Version bump to 1.6.0.

This should make version updates simpler. Also
try an make installer write to ProgramFiles instead
of ProgramFiles (x86) for 64 bit build.

.gitattributes

@@ -1,2 +0,0 @@
-# Use an approximate language for syntax highlighting (clojure is pretty close)
-*.janet linguist-language=clojure

.gitignore

@@ -13,6 +13,9 @@ janet
 janet-*.tar.gz
 dist
 
+# Kakoune (fzf via fd)
+.fdignore
+
 # VSCode
 .vscode
 

CHANGELOG.md

@@ -1,6 +1,123 @@
 # Changelog
 All notable changes to this project will be documented in this file.
 
+### 1.6.0 - 2019-12-22
+- Add `thread/` module to the core.
+- Allow seeding RNGs with any sequence of bytes. This provides
+  a wider key space for the RNG. Exposed in C as `janet_rng_longseed`.
+- Fix issue in `resume` and similar functions that could cause breakpoints to be skipped.
+- Add a number of new math functions.
+- Improve debugger experience and capabilities. See examples/debugger.janet
+  for what an interactive debugger could look like.
+- Add `debug/step` (janet\_step in the C API) for single stepping Janet bytecode.
+- The built in repl now can enter the debugger on any signal (errors, yields,
+  user signals, and debug signals). To enable this, type (setdyn :debug true)
+  in the repl environment.
+- When exiting the debugger, the fiber being debugged is resumed with the exit value
+  of the debug session (the value returned by `(quit return-value)`, or nil if user typed Ctrl-D).
+- `(quit)` can take an optional argument that is the return value. If a module
+  contains `(quit some-value)`, the value of that module returned to `(require "somemod")`
+  is the return value. This lets module writers completely customize a module without writing
+  a loader.
+- Add nested quasiquotation.
+- Add `os/cryptorand`
+- Add `prinf` and `eprinf` to be have like `printf` and `eprintf`. The latter two functions
+  now including a trailing newline, like the other print functions.
+- Add nan?
+- Add `janet_in` to C API.
+- Add `truthy?`
+- Add `os/environ`
+- Add `buffer/fill` and `array/fill`
+- Add `array/new-filled`
+- Use `(doc)` with no arguments to see available bindings and dynamic bindings.
+- `jpm` will use `CC` and `AR` environment variables when compiling programs.
+- Add `comptime` macro for compile time evaluation.
+- Run `main` functions in scripts if they exist, just like jpm standalone binaries.
+- Add `protect` macro.
+- Add `root-env` to get the root environment table.
+- Change marshalling protocol with regard to abstract types.
+- Add `show-paths` to `jpm`.
+- Add several default patterns, like `:d` and `:s+`, to PEGs.
+- Update `jpm` path settings to make using `jpm` easier on non-global module trees.
+- Numerous small bug fixes and usability improvements.
+
+### 1.5.1 - 2019-11-16
+- Fix bug when printing buffer to self in some edge cases.
+- Fix bug with `jpm` on windows.
+- Fix `update` return value.
+
+## 1.5.0 - 2019-11-10
+- `os/date` now defaults to UTC.
+- Add `--test` flag to jpm to test libraries on installation.
+- Add `math/rng`, `math/rng-int`, and `math/rng-uniform`.
+- Add `in` function to index in a stricter manner. Conversely, `get` will
+  now not throw errors on bad keys.
+- Indexed types and byte sequences will now error when indexed out of range or
+  with bad keys.
+- Add rng functions to Janet. This also replaces the RNG behind `math/random`
+  and `math/seedrandom` with a consistent, platform independent RNG.
+- Add `with-vars` macro.
+- Add the `quickbin` command to jpm.
+- Create shell.c when making the amalgamated source. This can be compiled with
+  janet.c to make the janet interpreter.
+- Add `cli-main` function to the core, which invokes Janet's CLI interface.
+  This basically moves what was init.janet into boot.janet.
+- Improve flychecking, and fix flychecking bugs introduced in 1.4.0.
+- Add `prin`, `eprint`, `eprintf` and `eprin` functions. The
+  functions prefix with e print to `(dyn :err stderr)`
+- Print family of functions can now also print to buffers
+  (before, they could only print to files.) Output can also
+  be completely disabled with `(setdyn :out false)`.
+- `printf` is now a c function for optimizations in the case
+  of printing to buffers.
+
+## 1.4.0 - 2019-10-14
+- Add `quit` function to exit from a repl, but not always exit the entire
+  application.
+- Add `update-pkgs` to jpm.
+- Integrate jpm with https://github.com/janet-lang/pkgs.git. jpm can now
+  install packages based on their short names in the package listing, which
+  can be customized via an env variable.
+- Add `varfn` macro
+- Add compile time arity checking when function in function call is known.
+- Added `slice` to the core library.
+- The `*/slice` family of functions now can take nil as start or end to get
+  the same behavior as the defaults (0 and -1) for those parameters.
+- `string/` functions that take a pattern to search for will throw an error
+  when receiving the empty string.
+- Replace (start:end) style stacktrace source position information with
+  line, column. This should be more readable for humans. Also, range information
+  can be recovered by re-parsing source.
+
+## 1.3.1 - 2019-09-21
+- Fix some linking issues when creating executables with native dependencies.
+- jpm now runs each test script in a new interpreter.
+- Fix an issue that prevent some valid programs from compiling.
+- Add `mean` to core.
+- Abstract types that implement the `:+`, `:-`, `:*`, `:/`, `:>`, `:==`, `:<`,
+  `:<=`, and `:>=` methods will work with the corresponding built-in
+  arithmetic functions. This means built-in integer types can now be used as
+  normal number values in many contexts.
+- Allow (length x) on typed arrays an other abstract types that implement
+  the :length method.
+
+## 1.3.0 - 2019-09-05
+- Add `get-in`, `put-in`, `update-in`, and `freeze` to core.
+- Add `jpm run rule` and `jpm rules` to jpm to improve utility and discoverability of jpm.
+- Remove `cook` module and move `path` module to https://github.com/janet-lang/path.git.
+  The functionality in `cook` is now bundled directly in the `jpm` script.
+- Add `buffer/format` and `string/format` format flags `Q` and `q` to print colored and
+  non-colored single-line values, similar to `P` and `p`.
+- Change default repl to print long sequences on one line and color stacktraces if color is enabled.
+- Add `backmatch` pattern for PEGs.
+- jpm detects if not in a Developer Command prompt on windows for a better error message.
+- jpm install git submodules in dependencies
+- Change default fiber stack limit to the maximum value of a 32 bit signed integer.
+- Some bug fixes with `jpm`
+- Fix bugs with pegs.
+- Add `os/arch` to get ISA that janet was compiled for
+- Add color to stacktraces via `(dyn :err-color)`
+
 ## 1.2.0 - 2019-08-08
 - Add `take` and `drop` functions that are easier to use compared to the
   existing slice functions.

Makefile

@@ -24,32 +24,37 @@
 
 PREFIX?=/usr/local
 
-INCLUDEDIR=$(PREFIX)/include
-BINDIR=$(PREFIX)/bin
-LIBDIR=$(PREFIX)/lib
-JANET_BUILD?="\"$(shell git log --pretty=format:'%h' -n 1)\""
-CLIBS=-lm
+INCLUDEDIR?=$(PREFIX)/include
+BINDIR?=$(PREFIX)/bin
+LIBDIR?=$(PREFIX)/lib
+JANET_BUILD?="\"$(shell git log --pretty=format:'%h' -n 1 || 'local')\""
+CLIBS=-lm -lpthread
 JANET_TARGET=build/janet
 JANET_LIBRARY=build/libjanet.so
 JANET_STATIC_LIBRARY=build/libjanet.a
-JANET_PATH?=$(PREFIX)/lib/janet
+JANET_PATH?=$(LIBDIR)/janet
 MANPATH?=$(PREFIX)/share/man/man1/
-PKG_CONFIG_PATH?=$(PREFIX)/lib/pkgconfig
+PKG_CONFIG_PATH?=$(LIBDIR)/pkgconfig
 DEBUGGER=gdb
 
-CFLAGS=-std=c99 -Wall -Wextra -Isrc/include -Isrc/conf -fpic -O2 -fvisibility=hidden \
+CFLAGS=-std=c99 -Wall -Wextra -Isrc/include -Isrc/conf -fPIC -O2 -fvisibility=hidden \
 	   -DJANET_BUILD=$(JANET_BUILD)
 LDFLAGS=-rdynamic
 
+# For installation
+LDCONFIG:=ldconfig "$(LIBDIR)"
+
 # Check OS
 UNAME:=$(shell uname -s)
 ifeq ($(UNAME), Darwin)
 	CLIBS:=$(CLIBS) -ldl
+	LDCONFIG:=
 else ifeq ($(UNAME), Linux)
 	CLIBS:=$(CLIBS) -lrt -ldl
 endif
 # For other unix likes, add flags here!
-ifeq ($(UNAME),Haiku)
+ifeq ($(UNAME), Haiku)
+	LDCONFIG:=
 	LDFLAGS=-Wl,--export-dynamic
 endif
 
@@ -101,6 +106,7 @@ JANET_CORE_SOURCES=src/core/abstract.c \
 				   src/core/struct.c \
 				   src/core/symcache.c \
 				   src/core/table.c \
+				   src/core/thread.c \
 				   src/core/tuple.c \
 				   src/core/typedarray.c \
 				   src/core/util.c \
@@ -135,14 +141,14 @@ build/janet_boot: $(JANET_BOOT_OBJECTS)
 
 # Now the reason we bootstrap in the first place
 build/core_image.c: build/janet_boot
-	build/janet_boot $@ JANET_PATH $(JANET_PATH) JANET_HEADERPATH $(INCLUDEDIR)/janet
+	build/janet_boot $@ JANET_PATH '$(JANET_PATH)' JANET_HEADERPATH '$(INCLUDEDIR)/janet'
 
 ##########################################################
 ##### The main interpreter program and shared object #####
 ##########################################################
 
 JANET_CORE_OBJECTS=$(patsubst src/%.c,build/%.o,$(JANET_CORE_SOURCES)) build/core_image.o
-JANET_MAINCLIENT_OBJECTS=$(patsubst src/%.c,build/%.o,$(JANET_MAINCLIENT_SOURCES)) build/init.gen.o
+JANET_MAINCLIENT_OBJECTS=$(patsubst src/%.c,build/%.o,$(JANET_MAINCLIENT_SOURCES))
 
 # Compile the core image generated by the bootstrap build
 build/core_image.o: build/core_image.c $(JANET_HEADERS) $(JANET_LOCAL_HEADERS)
@@ -199,8 +205,6 @@ emscripten: $(JANET_EMTARGET)
 build/xxd: tools/xxd.c
 	$(CC) $< -o $@
 
-build/init.gen.c: src/mainclient/init.janet build/xxd
-	build/xxd $< $@ janet_gen_init
 build/webinit.gen.c: src/webclient/webinit.janet build/xxd
 	build/xxd $< $@ janet_gen_webinit
 build/boot.gen.c: src/boot/boot.janet build/xxd
@@ -210,15 +214,22 @@ build/boot.gen.c: src/boot/boot.janet build/xxd
 ##### Amalgamation #####
 ########################
 
-amalg: build/janet.c build/janet.h build/core_image.c
+amalg: build/shell.c build/janet.c build/janet.h build/core_image.c build/janetconf.h
 
 AMALG_SOURCE=$(JANET_LOCAL_HEADERS) $(JANET_CORE_SOURCES) build/core_image.c
 build/janet.c: $(AMALG_SOURCE) tools/amalg.janet $(JANET_TARGET)
 	$(JANET_TARGET) tools/amalg.janet $(AMALG_SOURCE) > $@
 
+AMALG_SHELL_SOURCE=src/mainclient/line.h src/mainclient/line.c src/mainclient/main.c
+build/shell.c: $(JANET_TARGET) tools/amalg.janet $(AMALG_SHELL_SOURCE)
+	$(JANET_TARGET) tools/amalg.janet $(AMALG_SHELL_SOURCE) > $@
+
 build/janet.h: src/include/janet.h
 	cp $< $@
 
+build/janetconf.h: src/conf/janetconf.h
+	cp $< $@
+
 ###################
 ##### Testing #####
 ###################
@@ -238,9 +249,13 @@ valgrind: $(JANET_TARGET)
 
 test: $(JANET_TARGET) $(TEST_PROGRAMS)
 	for f in test/suite*.janet; do ./$(JANET_TARGET) "$$f" || exit; done
+	for f in examples/*.janet; do ./$(JANET_TARGET) -k "$$f"; done
+	./$(JANET_TARGET) -k auxbin/jpm
 
 valtest: $(JANET_TARGET) $(TEST_PROGRAMS)
 	for f in test/suite*.janet; do $(VALGRIND_COMMAND) ./$(JANET_TARGET) "$$f" || exit; done
+	for f in examples/*.janet; do ./$(JANET_TARGET) -k "$$f"; done
+	$(VALGRIND_COMMAND) ./$(JANET_TARGET) -k auxbin/jpm
 
 callgrind: $(JANET_TARGET)
 	for f in test/suite*.janet; do valgrind --tool=callgrind ./$(JANET_TARGET) "$$f" || exit; done
@@ -253,9 +268,12 @@ dist: build/janet-dist.tar.gz
 
 build/janet-%.tar.gz: $(JANET_TARGET) \
 	src/include/janet.h src/conf/janetconf.h \
-	janet.1 LICENSE CONTRIBUTING.md $(JANET_LIBRARY) $(JANET_STATIC_LIBRARY) \
-	build/doc.html README.md build/janet.c
-	tar -czvf $@ $^
+	jpm.1 janet.1 LICENSE CONTRIBUTING.md $(JANET_LIBRARY) $(JANET_STATIC_LIBRARY) \
+	build/doc.html README.md build/janet.c build/shell.c auxbin/jpm
+	$(eval JANET_DIST_DIR = "janet-$(shell basename $*)")
+	mkdir -p build/$(JANET_DIST_DIR)
+	cp -r $^ build/$(JANET_DIST_DIR)/
+	cd build && tar -czvf ../$@ $(JANET_DIST_DIR)
 
 #########################
 ##### Documentation #####
@@ -272,9 +290,8 @@ build/doc.html: $(JANET_TARGET) tools/gendoc.janet
 
 SONAME=libjanet.so.1
 
-.PHONY: $(PKG_CONFIG_PATH)/janet.pc
-$(PKG_CONFIG_PATH)/janet.pc: $(JANET_TARGET)
-	mkdir -p $(PKG_CONFIG_PATH)
+.PHONY: build/janet.pc
+build/janet.pc: $(JANET_TARGET)
 	echo 'prefix=$(PREFIX)' > $@
 	echo 'exec_prefix=$${prefix}' >> $@
 	echo 'includedir=$(INCLUDEDIR)/janet' >> $@
@@ -288,31 +305,34 @@ $(PKG_CONFIG_PATH)/janet.pc: $(JANET_TARGET)
 	echo 'Libs: -L$${libdir} -ljanet $(LDFLAGS)' >> $@
 	echo 'Libs.private: $(CLIBS)' >> $@
 
-install: $(JANET_TARGET) $(PKG_CONFIG_PATH)/janet.pc
-	mkdir -p $(BINDIR)
-	cp $(JANET_TARGET) $(BINDIR)/janet
-	mkdir -p $(INCLUDEDIR)/janet
-	cp -rf $(JANET_HEADERS) $(INCLUDEDIR)/janet
-	mkdir -p $(JANET_PATH)
-	mkdir -p $(LIBDIR)
-	cp $(JANET_LIBRARY) $(LIBDIR)/libjanet.so.$(shell $(JANET_TARGET) -e '(print janet/version)')
-	cp $(JANET_STATIC_LIBRARY) $(LIBDIR)/libjanet.a
-	ln -sf $(SONAME) $(LIBDIR)/libjanet.so
+install: $(JANET_TARGET) build/janet.pc
+	mkdir -p '$(BINDIR)'
+	cp $(JANET_TARGET) '$(BINDIR)/janet'
+	mkdir -p '$(INCLUDEDIR)/janet'
+	cp -rf $(JANET_HEADERS) '$(INCLUDEDIR)/janet'
+	mkdir -p '$(JANET_PATH)'
+	mkdir -p '$(LIBDIR)'
+	cp $(JANET_LIBRARY) '$(LIBDIR)/libjanet.so.$(shell $(JANET_TARGET) -e '(print janet/version)')'
+	cp $(JANET_STATIC_LIBRARY) '$(LIBDIR)/libjanet.a'
+	ln -sf $(SONAME) '$(LIBDIR)/libjanet.so'
 	ln -sf libjanet.so.$(shell $(JANET_TARGET) -e '(print janet/version)') $(LIBDIR)/$(SONAME)
-	cp -rf auxlib/* $(JANET_PATH)
-	cp -rf auxbin/* $(BINDIR)
-	mkdir -p $(MANPATH)
-	cp janet.1 $(MANPATH)
-	-ldconfig $(LIBDIR)
+	cp -rf auxbin/* '$(BINDIR)'
+	mkdir -p '$(MANPATH)'
+	cp janet.1 '$(MANPATH)'
+	cp jpm.1 '$(MANPATH)'
+	mkdir -p '$(PKG_CONFIG_PATH)'
+	cp build/janet.pc '$(PKG_CONFIG_PATH)/janet.pc'
+	-$(LDCONFIG)
 
 uninstall:
-	-rm $(BINDIR)/janet
-	-rm $(BINDIR)/jpm
-	-rm -rf $(INCLUDEDIR)/janet
-	-rm -rf $(LIBDIR)/libjanet.*
-	-rm $(PKG_CONFIG_PATH)/janet.pc
-	-rm $(MANPATH)/janet.1
-	# -rm -rf $(JANET_PATH)/* - err on the side of correctness here
+	-rm '$(BINDIR)/janet'
+	-rm '$(BINDIR)/jpm'
+	-rm -rf '$(INCLUDEDIR)/janet'
+	-rm -rf '$(LIBDIR)'/libjanet.*
+	-rm '$(PKG_CONFIG_PATH)/janet.pc'
+	-rm '$(MANPATH)/janet.1'
+	-rm '$(MANPATH)/jpm.1'
+	# -rm -rf '$(JANET_PATH)'/* - err on the side of correctness here
 
 #################
 ##### Other #####
@@ -329,8 +349,17 @@ clean:
 	-rm -rf build vgcore.* callgrind.*
 
 test-install:
-	cd test/install && rm -rf build .cache .manifests && jpm --verbose build && jpm --verbose test \
-		&& build/testexec
+	cd test/install \
+		&& rm -rf build .cache .manifests \
+		&& jpm --verbose build \
+		&& jpm --verbose test \
+		&& build/testexec \
+		&& jpm --verbose quickbin testexec.janet build/testexec2 \
+		&& build/testexec2 \
+		&& jpm --verbose --testdeps --modpath=. install https://github.com/janet-lang/json.git
+	cd test/install && jpm --verbose --test --modpath=. install https://github.com/janet-lang/jhydro.git
+	cd test/install && jpm --verbose --test --modpath=. install https://github.com/janet-lang/path.git
+	cd test/install && jpm --verbose --test --modpath=. install https://github.com/janet-lang/argparse.git
 
 build/embed_janet.o: build/janet.c $(JANET_HEADERS)
 	$(CC) $(CFLAGS) -c $< -o $@

README.md

@@ -4,7 +4,6 @@
 [![Build Status](https://travis-ci.org/janet-lang/janet.svg?branch=master)](https://travis-ci.org/janet-lang/janet)
 [![builds.sr.ht status](https://builds.sr.ht/~bakpakin/janet/.freebsd.yaml.svg)](https://builds.sr.ht/~bakpakin/janet/.freebsd.yaml?)
 [![builds.sr.ht status](https://builds.sr.ht/~bakpakin/janet/.openbsd.yaml.svg)](https://builds.sr.ht/~bakpakin/janet/.openbsd.yaml?)
-<noscript><a href="https://liberapay.com/Janet-Language/donate"><img alt="Donate using Liberapay" src="https://liberapay.com/assets/widgets/donate.svg"></a></noscript>
 
 <img src="https://raw.githubusercontent.com/janet-lang/janet/master/assets/janet-w200.png" alt="Janet logo" width=200 align="left">
 
@@ -62,7 +61,7 @@ documentation for symbols in the core library. For example,
 Shows documentation for the doc macro.
 
 To get a list of all bindings in the default
-environment, use the `(all-symbols)` function.
+environment, use the `(all-bindings)` function.
 
 ## Source
 
@@ -132,12 +131,32 @@ is maybe more convenient and flexible for integrating into existing pipelines.
 Meson also provides much better IDE integration than Make or batch files, as well as support
 for cross compilation.
 
+For the impatient, building with Meson is as simple as follows. The options provided to
+`meson setup` below emulate Janet's Makefile.
+
+```sh
+git clone https://github.com/janet-lang/janet.git
+cd janet
+meson setup build \
+          --buildtype release \
+          --optimization 2 \
+          -Dgit_hash=$(git log --pretty=format:'%h' -n 1)
+ninja -C build
+
+# Run the binary
+build/janet
+
+# Installation
+ninja -C build install
+```
+
 ## Development
 
 Janet can be hacked on with pretty much any environment you like, but for IDE
 lovers, [Gnome Builder](https://wiki.gnome.org/Apps/Builder) is probably the
 best option, as it has excellent meson integration. It also offers code completion
-for Janet's C API right out of the box, which is very useful for exploring.
+for Janet's C API right out of the box, which is very useful for exploring. VSCode, Vim,
+Emacs, and Atom will have syntax packages for the Janet language, though.
 
 ## Installation
 

appveyor.yml

@@ -7,6 +7,7 @@ configuration:
 - Debug
 platform:
 - x64
+- x86
 environment:
   matrix:
   - arch: Win64
@@ -15,9 +16,10 @@ matrix:
 
 # skip unsupported combinations
 init:
-- call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars32.bat"
+    - call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" %platform%
 
 install:
+    - set JANET_BUILD=%appveyor_repo_commit:~0,7%
     - choco install nsis -y -pre
     # Replace makensis.exe and files with special long string build. This should
     # prevent issues when setting PATH during installation.
@@ -25,18 +27,30 @@ install:
     - build_win all
     - refreshenv
     # We need to reload vcvars after refreshing
-    - call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvars32.bat"
+    - call "C:\Program Files (x86)\Microsoft Visual Studio\2019\Community\VC\Auxiliary\Build\vcvarsall.bat" %platform%
     - build_win test-install
+    - set janet_outname=%appveyor_repo_tag_name%
+    - if "%janet_outname%"=="" set janet_outname=v1.6.0
 build: off
 
-only_commits:
-  files:
-    - appveyor.yml
-    - src/
-
 artifacts:
-    - path: janet-v1.2.0-windows-installer.exe
-      name: janet-v1.2.0-windows-installer.exe
+    - name: janet.c
+      path: dist\janet.c
+      type: File
+    - name: janet.h
+      path: dist\janet.h
+      type: File
+    - name: janetconf.h
+      path: dist\janetconf.h
+      type: File
+    - name: shell.c
+      path: dist\shell.c
+      type: File
+    - name: "janet-$(janet_outname)-windows-%platform%"
+      path: dist
+      type: Zip
+    - path: "janet-$(janet_outname)-windows-installer.exe"
+      name: "janet-$(janet_outname)-windows-%platform%-installer.exe"
       type: File
 
 deploy:
@@ -44,7 +58,7 @@ deploy:
   provider: GitHub
   auth_token:
     secure: lwEXy09qhj2jSH9s1C/KvCkAUqJSma8phFR+0kbsfUc3rVxpNK5uD3z9Md0SjYRx
-  artifact: janet-windows
+  artifact: /(janet|shell).*/
   draft: true
   on:
       APPVEYOR_REPO_TAG: true

auxlib/cook.janet

@@ -1,747 +0,0 @@
-### cook.janet
-###
-### Library to help build janet natives and other
-### build artifacts.
-###
-### Copyright 2019 © Calvin Rose
-
-#
-# Basic Path Settings
-#
-
-# Windows is the OS outlier
-(def- is-win (= (os/which) :windows))
-(def- is-mac (= (os/which) :macos))
-(def- sep (if is-win "\\" "/"))
-(def- objext (if is-win ".obj" ".o"))
-(def- modext (if is-win ".dll" ".so"))
-(def- statext (if is-win ".static.lib" ".a"))
-(def- absprefix (if is-win "C:\\" "/"))
-
-#
-# Rule Engine
-#
-
-(defn- getrules []
-  (if-let [rules (dyn :rules)] rules (setdyn :rules @{})))
-
-(defn- gettarget [target]
-  (def item ((getrules) target))
-  (unless item (error (string "No rule for target " target)))
-  item)
-
-(defn- rule-impl
-  [target deps thunk &opt phony]
-  (put (getrules) target @[(array/slice deps) thunk phony]))
-
-(defmacro rule
-  "Add a rule to the rule graph."
-  [target deps & body]
-  ~(,rule-impl ,target ,deps (fn [] nil ,;body)))
-
-(defmacro phony
-  "Add a phony rule to the rule graph. A phony rule will run every time
-  (it is always considered out of date). Phony rules are good for defining
-  user facing tasks."
-  [target deps & body]
-  ~(,rule-impl ,target ,deps (fn [] nil ,;body) true))
-
-(defn add-dep
-  "Add a dependency to an existing rule. Useful for extending phony
-  rules or extending the dependency graph of existing rules."
-  [target dep]
-  (def [deps] (gettarget target))
-  (array/push deps dep))
-
-(defn- add-thunk
-  [target more]
-  (def item (gettarget target))
-  (def [_ thunk] item)
-  (put item 1 (fn [] (more) (thunk))))
-
-(defmacro add-body
-  "Add recipe code to an existing rule. This makes existing rules do more but
-  does not modify the dependency graph."
-  [target & body]
-  ~(,add-thunk ,target (fn [] ,;body)))
-
-(defn- needs-build
-  [dest src]
-  (let [mod-dest (os/stat dest :modified)
-        mod-src (os/stat src :modified)]
-    (< mod-dest mod-src)))
-
-(defn- needs-build-some
-  [dest sources]
-  (def f (file/open dest))
-  (if (not f) (break true))
-  (file/close f)
-  (some (partial needs-build dest) sources))
-
-(defn do-rule
-  "Evaluate a given rule."
-  [target]
-  (def item ((getrules) target))
-  (unless item
-    (if (os/stat target :mode)
-      (break target)
-      (error (string "No rule for file " target " found."))))
-  (def [deps thunk phony] item)
-  (def realdeps (seq [dep :in deps :let [x (do-rule dep)] :when x] x))
-  (when (or phony (needs-build-some target realdeps))
-    (thunk))
-  (unless phony target))
-
-#
-# Configuration
-#
-
-(def JANET_MODPATH (or (os/getenv "JANET_MODPATH") (dyn :syspath)))
-(def JANET_HEADERPATH (or (os/getenv "JANET_HEADERPATH")
-                          (if-let [j JANET_MODPATH]
-                            (string j "/../../include/janet"))))
-(def JANET_BINPATH (or (os/getenv "JANET_BINPATH")
-                       (if-let [j JANET_MODPATH]
-                         (string j "/../../bin"))))
-(def JANET_LIBPATH (or (os/getenv "JANET_LIBPATH")
-                       (if-let [j JANET_MODPATH]
-                         (string j "/.."))))
-
-#
-# Compilation Defaults
-#
-
-(def default-compiler (if is-win "cl" "cc"))
-(def default-linker (if is-win "link" "cc"))
-(def default-archiver (if is-win "lib" "ar"))
-
-# Default flags for natives, but not required
-(def default-lflags (if is-win ["/nologo"] []))
-(def default-cflags
-  (if is-win
-    ["/nologo"]
-    ["-std=c99" "-Wall" "-Wextra"]))
-
-# Required flags for dynamic libraries. These
-# are used no matter what for dynamic libraries.
-(def- dynamic-cflags
-  (if is-win
-    []
-    ["-fpic"]))
-(def- dynamic-lflags
-    (if is-win
-      ["/DLL"]
-      (if is-mac
-        ["-shared" "-undefined" "dynamic_lookup"]
-        ["-shared"])))
-
-(defn- opt
-  "Get an option, allowing overrides via dynamic bindings AND some
-  default value dflt if no dynamic binding is set."
-  [opts key dflt]
-  (def ret (or (opts key) (dyn key dflt)))
-  (if (= nil ret)
-    (error (string "option :" key " not set")))
-  ret)
-
-#
-# Importing a file
-#
-
-(def- _env (fiber/getenv (fiber/current)))
-
-(defn- proto-flatten
-  [into x]
-  (when x
-    (proto-flatten into (table/getproto x))
-    (loop [k :keys x]
-      (put into k (x k))))
-  into)
-
-(defn import-rules
-  "Import another file that defines more cook rules. This ruleset
-  is merged into the current ruleset."
-  [path]
-  (def env (make-env))
-  (unless (os/stat path :mode)
-    (error (string "cannot open " path)))
-  (loop [k :keys _env :when (symbol? k)]
-     (unless ((_env k) :private) (put env k (_env k))))
-  (def currenv (proto-flatten @{} (fiber/getenv (fiber/current))))
-  (loop [k :keys currenv :when (keyword? k)]
-    (put env k (currenv k)))
-  (dofile path :env env :exit true)
-  (when-let [rules (env :rules)] (merge-into (getrules) rules)))
-
-#
-# OS and shell helpers
-#
-
-(def- filepath-replacer
-  "Convert url with potential bad characters into a file path element."
-  (peg/compile ~(% (any (+ (/ '(set "<>:\"/\\|?*") "_") '1)))))
-
-(defn filepath-replace
-  "Remove special characters from a string or path
-  to make it into a path segment."
-  [repo]
-  (get (peg/match filepath-replacer repo) 0))
-
-(defn shell
-  "Do a shell command"
-  [& args]
-  (if (dyn :verbose)
-    (print ;(interpose " " args)))
-  (def res (os/execute args :p))
-  (unless (zero? res)
-    (error (string "command exited with status " res))))
-
-(defn rm
-  "Remove a directory and all sub directories."
-  [path]
-  (if (= (os/stat path :mode) :directory)
-    (do
-      (each subpath (os/dir path)
-        (rm (string path sep subpath)))
-      (os/rmdir path))
-    (os/rm path)))
-
-(defn copy
-  "Copy a file or directory recursively from one location to another."
-  [src dest]
-  (print "copying " src " to " dest "...")
-  (if is-win
-    (shell "xcopy" src dest "/y" "/e")
-    (shell "cp" "-rf" src dest)))
-
-#
-# C Compilation
-#
-
-(defn- embed-name
-  "Rename a janet symbol for embedding."
-  [path]
-  (->> path
-       (string/replace-all sep "___")
-       (string/replace-all ".janet" "")))
-
-(defn- out-path
-  "Take a source file path and convert it to an output path."
-  [path from-ext to-ext]
-  (->> path
-       (string/replace-all sep "___")
-       (string/replace-all from-ext to-ext)
-       (string "build" sep)))
-
-(defn- make-define
-  "Generate strings for adding custom defines to the compiler."
-  [define value]
-  (if value
-    (string (if is-win "/D" "-D") define "=" value)
-    (string (if is-win "/D" "-D") define)))
-
-(defn- make-defines
-  "Generate many defines. Takes a dictionary of defines. If a value is
-  true, generates -DNAME (/DNAME on windows), otherwise -DNAME=value."
-  [defines]
-  (seq [[d v] :pairs defines] (make-define d (if (not= v true) v))))
-
-(defn- getcflags
-  "Generate the c flags from the input options."
-  [opts]
-  @[;(opt opts :cflags default-cflags)
-    (string (if is-win "/I" "-I") (dyn :headerpath JANET_HEADERPATH))
-    (string (if is-win "/O" "-O") (opt opts :optimize 2))])
-
-(defn- entry-name
-  "Name of symbol that enters static compilation of a module."
-  [name]
-  (string "janet_module_entry_" (filepath-replace name)))
-
-(defn- compile-c
-  "Compile a C file into an object file."
-  [opts src dest &opt static?]
-  (def cc (opt opts :compiler default-compiler))
-  (def cflags [;(getcflags opts) ;(if static? [] dynamic-cflags)])
-  (def entry-defines (if-let [n (opts :entry-name)]
-                       [(make-define "JANET_ENTRY_NAME" n)]
-                       []))
-  (def defines [;(make-defines (opt opts :defines {})) ;entry-defines])
-  (def headers (or (opts :headers) []))
-  (rule dest [src ;headers]
-        (print "compiling " dest "...")
-        (if is-win
-          (shell cc ;defines "/c" ;cflags (string "/Fo" dest) src)
-          (shell cc "-c" src ;defines ;cflags "-o" dest))))
-
-(defn- libjanet
-  "Find libjanet.a (or libjanet.lib on windows) at compile time"
-  []
-  (def libpath (dyn :libpath JANET_LIBPATH))
-  (unless libpath
-    (error "cannot find libpath: provide --libpath or JANET_LIBPATH"))
-  (string (dyn :libpath JANET_LIBPATH)
-          sep
-          (if is-win "libjanet.lib" "libjanet.a")))
-
-(defn- win-import-library
-  "On windows, an import library is needed to link to a dll statically."
-  []
-  (def hpath (dyn :headerpath JANET_HEADERPATH))
-  (unless hpath
-    (error "cannot find headerpath: provide --headerpath or JANET_HEADERPATH"))
-  (string hpath `\\janet.lib`))
-
-(defn- link-c
-  "Link object files together to make a native module."
-  [opts target & objects]
-  (def ld (opt opts :linker default-linker))
-  (def cflags (getcflags opts))
-  (def lflags [;(opt opts :lflags default-lflags)
-               ;(if (opts :static) [] dynamic-lflags)])
-  (rule target objects
-        (print "linking " target "...")
-        (if is-win
-          (shell ld ;lflags (string "/OUT:" target) ;objects (win-import-library))
-          (shell ld ;cflags `-o` target ;objects ;lflags))))
-
-(defn- archive-c
-  "Link object files together to make a static library."
-  [opts target & objects]
-  (def ar (opt opts :archiver default-archiver))
-  (rule target objects
-        (print "creating static library " target "...")
-        (if is-win
-          (shell ar "/nologo" (string "/out:" target) ;objects)
-          (shell ar "rcs" target ;objects))))
-
-(defn- create-buffer-c-impl
-  [bytes dest name]
-  (def out (file/open dest :w))
-  (def chunks (seq [b :in bytes] (string b)))
-  (file/write out
-              "#include <janet.h>\n"
-              "static const unsigned char bytes[] = {"
-              ;(interpose ", " chunks)
-              "};\n\n"
-              "const unsigned char *" name "_embed = bytes;\n"
-              "size_t " name "_embed_size = sizeof(bytes);\n")
-  (file/close out))
-
-(defn- create-buffer-c
-  "Inline raw byte file as a c file."
-  [source dest name]
-  (rule dest [source]
-        (print "generating " dest "...")
-        (with [f (file/open source :r)]
-          (create-buffer-c-impl (:read f :all) dest name))))
-
-(def- root-env (table/getproto (fiber/getenv (fiber/current))))
-
-(defn- modpath-to-meta
-  "Get the meta file path (.meta.janet) corresponding to a native module path (.so)."
-  [path]
-  (string (string/slice path 0 (- (length modext))) "meta.janet"))
-
-(defn- modpath-to-static
-  "Get the static library (.a) path corresponding to a native module path (.so)."
-  [path]
-  (string (string/slice path 0 (- -1 (length modext))) statext))
-
-(defn- create-executable
-  "Links an image with libjanet.a (or .lib) to produce an
-  executable. Also will try to link native modules into the
-  final executable as well."
-  [opts source dest]
-
-  # Create executable's janet image
-  (def cimage_dest (string dest ".c"))
-  (rule dest [source]
-        (print "generating executable c source...")
-        # Load entry environment and get main function.
-        (def entry-env (dofile source))
-        (def main ((entry-env 'main) :value))
-
-        # Create marshalling dictionary
-        (def mdict (invert (env-lookup root-env)))
-        # Load all native modules
-        (def prefixes @{})
-        (def static-libs @[])
-        (loop [[name m] :pairs module/cache
-               :let [n (m :native)]
-               :when n
-               :let [prefix (gensym)]]
-          (print "found native " n "...")
-          (put prefixes prefix n)
-          (array/push static-libs (modpath-to-static n))
-          (def oldproto (table/getproto m))
-          (table/setproto m nil)
-          (loop [[sym value] :pairs (env-lookup m)]
-            (put mdict value (symbol prefix sym)))
-          (table/setproto m oldproto))
-
-        # Find static modules
-        (def declarations @"")
-        (def lookup-into-invocations @"")
-        (loop [[prefix name] :pairs prefixes]
-          (def meta (eval-string (slurp (modpath-to-meta name))))
-          (buffer/push-string lookup-into-invocations
-                              "    temptab = janet_table(0);\n"
-                              "    temptab->proto = env;\n"
-                              "    " (meta :static-entry) "(temptab);\n"
-                              "    janet_env_lookup_into(lookup, temptab, \""
-                              prefix
-                              "\", 0);\n\n")
-          (buffer/push-string declarations
-                              "extern void "
-                              (meta :static-entry)
-                              "(JanetTable *);\n"))
-
-
-        # Build image
-        (def image (marshal main mdict))
-        # Make image byte buffer
-        (create-buffer-c-impl image cimage_dest "janet_payload_image")
-        # Append main function
-        (spit cimage_dest (string
-                            "\n"
-                            declarations
-```
-
-int main(int argc, const char **argv) {
-    janet_init();
-
-    /* Get core env */
-    JanetTable *env = janet_core_env(NULL);
-    JanetTable *lookup = janet_env_lookup(env);
-    JanetTable *temptab;
-    int handle = janet_gclock();
-
-    /* Load natives into unmarshalling dictionary */
-
-```
-                            lookup-into-invocations
-```
-    /* Unmarshal bytecode */
-    Janet marsh_out = janet_unmarshal(
-      janet_payload_image_embed,
-      janet_payload_image_embed_size,
-      0,
-      lookup,
-      NULL);
-
-    /* Verify the marshalled object is a function */
-    if (!janet_checktype(marsh_out, JANET_FUNCTION)) {
-      fprintf(stderr, "invalid bytecode image - expected function.");
-      return 1;
-    }
-
-    /* Collect command line arguments */
-    JanetArray *args = janet_array(argc);
-    for (int i = 0; i < argc; i++) {
-      janet_array_push(args, janet_cstringv(argv[i]));
-    }
-
-    /* Create enviornment */
-    JanetTable *runtimeEnv = janet_table(0);
-    runtimeEnv->proto = env;
-    janet_table_put(runtimeEnv, janet_ckeywordv("args"), janet_wrap_array(args));
-    janet_gcroot(janet_wrap_table(runtimeEnv));
-
-    /* Unlock GC */
-    janet_gcunlock(handle);
-
-    /* Run everything */
-    JanetFiber *fiber = janet_fiber(janet_unwrap_function(marsh_out), 64, argc, args->data);
-    fiber->env = runtimeEnv;
-    Janet out;
-    JanetSignal result = janet_continue(fiber, janet_wrap_nil(), &out);
-    if (result) {
-      janet_stacktrace(fiber, out);
-      janet_deinit();
-      return result;
-    }
-    janet_deinit();
-    return 0;
-}
-
-```) :ab)
-
-# Compile and link final exectable
-(do
-  (def extra-lflags (case (os/which)
-                      :macos ["-ldl" "-lm"]
-                      :windows []
-                      :linux ["-lm" "-ldl" "-lrt"]
-                      #default
-                      ["-lm"]))
-  (def cc (opt opts :compiler default-compiler))
-  (def lflags [;(opt opts :lflags default-lflags) ;extra-lflags])
-  (def cflags (getcflags opts))
-  (def defines (make-defines (opt opts :defines {})))
-  (print "compiling and linking " dest "...")
-  (if is-win
-    (shell cc ;cflags (string "/OUT:" dest) cimage_dest ;static-libs (libjanet) ;lflags)
-    (shell cc ;cflags `-o` dest cimage_dest ;static-libs (libjanet) ;lflags)))))
-
-(defn- abspath
-  "Create an absolute path. Does not resolve . and .. (useful for
-  generating entries in install manifest file)."
-  [path]
-  (if (string/has-prefix? absprefix)
-    path
-    (string (os/cwd) sep path)))
-
-#
-# Public utilities
-#
-
-(defn find-manifest-dir
-  "Get the path to the directory containing manifests for installed
-  packages."
-  []
-  (string (dyn :modpath JANET_MODPATH) sep ".manifests"))
-
-(defn find-manifest
-  "Get the full path of a manifest file given a package name."
-  [name]
-  (string (find-manifest-dir) sep name ".txt"))
-
-(defn find-cache
-  "Return the path to the global cache."
-  []
-  (def path (dyn :modpath JANET_MODPATH))
-  (string path sep ".cache"))
-
-(defn uninstall
-  "Uninstall bundle named name"
-  [name]
-  (def manifest (find-manifest name))
-  (def f (file/open manifest :r))
-  (unless f (print manifest " does not exist") (break))
-  (loop [line :iterate (:read f :line)]
-    (def path ((string/split "\n" line) 0))
-    (print "removing " path)
-    (try (rm path) ([err]
-                    (unless (= err "No such file or directory")
-                      (error err)))))
-  (:close f)
-  (print "removing " manifest)
-  (rm manifest)
-  (print "Uninstalled."))
-
-(defn clear-cache
-  "Clear the global git cache."
-  []
-  (def cache (find-cache))
-  (print "clearing " cache "...")
-  (if is-win
-    # Git for windows decided that .git should be hidden and everything in it read-only.
-    # This means we can't delete things easily.
-    (os/shell (string `rmdir /S /Q "` cache `"`))
-    (rm cache)))
-
-(defn install-git
-  "Install a bundle from git. If the bundle is already installed, the bundle
-  is reinistalled (but not rebuilt if artifacts are cached)."
-  [repo]
-  (def cache (find-cache))
-  (os/mkdir cache)
-  (def id (filepath-replace repo))
-  (def module-dir (string cache sep id))
-  (when (os/mkdir module-dir)
-    (os/execute ["git" "clone" repo module-dir] :p))
-  (def olddir (os/cwd))
-  (os/cd module-dir)
-  (try
-    (with-dyns [:rules @{}]
-      (import-rules "./project.janet")
-      (do-rule "install-deps")
-      (do-rule "build")
-      (do-rule "install"))
-    ([err] nil))
-  (os/cd olddir))
-
-(defn install-rule
-  "Add install and uninstall rule for moving file from src into destdir."
-  [src destdir]
-  (def parts (string/split sep src))
-  (def name (last parts))
-  (def path (string destdir sep name))
-  (array/push (dyn :installed-files) path)
-  (add-body "install"
-            (try (os/mkdir destdir) ([err] nil))
-            (copy src destdir)))
-
-#
-# Declaring Artifacts - used in project.janet, targets specifically
-# tailored for janet.
-#
-
-(defn declare-native
-  "Declare a native module. This is a shared library that can be loaded
-  dynamically by a janet runtime. This also builds a static libary that
-  can be used to bundle janet code and native into a single executable."
-  [&keys opts]
-  (def sources (opts :source))
-  (def name (opts :name))
-  (def path (dyn :modpath JANET_MODPATH))
-
-  # Make dynamic module
-  (def lname (string "build" sep name modext))
-  (loop [src :in sources]
-    (compile-c opts src (out-path src ".c" objext)))
-  (def objects (map (fn [path] (out-path path ".c" objext)) sources))
-  (when-let [embedded (opts :embedded)]
-            (loop [src :in embedded]
-              (def c-src (out-path src ".janet" ".janet.c"))
-              (def o-src (out-path src ".janet" (if is-win ".janet.obj" ".janet.o")))
-              (array/push objects o-src)
-              (create-buffer-c src c-src (embed-name src))
-              (compile-c opts c-src o-src)))
-  (link-c opts lname ;objects)
-  (add-dep "build" lname)
-  (install-rule lname path)
-
-  # Add meta file
-  (def metaname (modpath-to-meta lname))
-  (def ename (entry-name name))
-  (rule metaname []
-        (print "generating meta file " metaname "...")
-        (spit metaname (string/format
-                         "# Metadata for static library %s\n\n%.20p"
-                         (string name statext)
-                         {:static-entry ename
-                          :lflags (opts :lflags)})))
-  (add-dep "build" metaname)
-  (install-rule metaname path)
-
-  # Make static module
-  (unless (dyn :nostatic)
-    (def sname (string "build" sep name statext))
-    (def opts (merge @{:entry-name ename} opts))
-    (def sobjext (string ".static" objext))
-    (def sjobjext (string ".janet" sobjext))
-    (loop [src :in sources]
-      (compile-c opts src (out-path src ".c" sobjext) true))
-    (def sobjects (map (fn [path] (out-path path ".c" sobjext)) sources))
-    (when-let [embedded (opts :embedded)]
-              (loop [src :in embedded]
-                (def c-src (out-path src ".janet" ".janet.c"))
-                (def o-src (out-path src ".janet" sjobjext))
-                (array/push sobjects o-src)
-                # Buffer c-src is already declared by dynamic module
-                (compile-c opts c-src o-src true)))
-    (archive-c opts sname ;sobjects)
-    (add-dep "build" sname)
-    (install-rule sname path)))
-
-(defn declare-source
-  "Create a Janet modules. This does not actually build the module(s),
-  but registers it for packaging and installation."
-  [&keys {:source sources}]
-  (def path (dyn :modpath JANET_MODPATH))
-  (if (bytes? sources)
-    (install-rule sources path)
-    (each s sources
-      (install-rule s path))))
-
-(defn declare-bin
-  "Declare a generic file to be installed as an executable."
-  [&keys {:main main}]
-  (install-rule main (dyn :binpath JANET_BINPATH)))
-
-(defn declare-executable
-  "Declare a janet file to be the entry of a standalone executable program. The entry
-  file is evaluated and a main function is looked for in the entry file. This function
-  is marshalled into bytecode which is then embedded in a final executable for distribution.\n\n
-  This executable can be installed as well to the --binpath given."
-  [&keys {:install install :name name :entry entry}]
-  (def name (if is-win (string name ".exe") name))
-  (def dest (string "build" sep name))
-  (create-executable @{} entry dest)
-  (add-dep "build" dest)
-  (when install
-    (install-rule dest (dyn :binpath JANET_BINPATH))))
-
-(defn declare-binscript
-  "Declare a janet file to be installed as an executable script. Creates
-  a shim on windows."
-  [&keys opts]
-  (def main (opts :main))
-  (def binpath (dyn :binpath JANET_BINPATH))
-  (install-rule main binpath)
-  # Create a dud batch file when on windows.
-  (when is-win
-    (def name (last (string/split sep main)))
-    (def bat (string "@echo off\r\njanet %~dp0\\" name "%*"))
-    (def newname (string binpath sep name ".bat"))
-    (add-body "install"
-              (spit newname bat))
-    (add-body "uninstall"
-              (os/rm newname))))
-
-(defn declare-archive
-  "Build a janet archive. This is a file that bundles together many janet
-  scripts into a janet image. This file can the be moved to any machine with
-  a janet vm and the required dependencies and run there."
-  [&keys opts]
-  (def entry (opts :entry))
-  (def name (opts :name))
-  (def iname (string "build" sep name ".jimage"))
-  (rule iname (or (opts :deps) [])
-        (spit iname (make-image (require entry))))
-  (def path (dyn :modpath JANET_MODPATH))
-  (add-dep "build" iname)
-  (install-rule iname path))
-
-(defn declare-project
-  "Define your project metadata. This should
-  be the first declaration in a project.janet file.
-  Also sets up basic phony targets like clean, build, test, etc."
-  [&keys meta]
-  (setdyn :project meta)
-
-  (def installed-files @[])
-  (def manifests (find-manifest-dir))
-  (def manifest (find-manifest (meta :name)))
-  (setdyn :manifest manifest)
-  (setdyn :manifest-dir manifests)
-  (setdyn :installed-files installed-files)
-
-  (rule "./build" [] (os/mkdir "build"))
-  (phony "build" ["./build"])
-
-  (phony "manifest" []
-         (print "generating " manifest "...")
-         (os/mkdir manifests)
-         (spit manifest (string (string/join installed-files "\n") "\n")))
-  (phony "install" ["uninstall" "build" "manifest"]
-         (print "Installed as '" (meta :name) "'."))
-
-  (phony "install-deps" []
-         (if-let [deps (meta :dependencies)]
-           (each dep deps
-             (install-git dep))
-           (print "no dependencies found")))
-
-  (phony "uninstall" []
-         (uninstall (meta :name)))
-
-  (phony "clean" []
-         (when (os/stat "./build" :mode)
-           (rm "build")
-           (print "Deleted build directory.")))
-
-  (phony "test" ["build"]
-         (defn dodir
-           [dir]
-           (each sub (os/dir dir)
-             (def ndir (string dir sep sub))
-             (case (os/stat ndir :mode)
-               :file (when (string/has-suffix? ".janet" ndir)
-                       (print "running " ndir " ...")
-                       (dofile ndir :exit true))
-               :directory (dodir ndir))))
-         (dodir "test")
-         (print "All tests passed.")))

auxlib/path.janet

@@ -1,149 +0,0 @@
-### path.janet
-###
-### A library for path manipulation.
-###
-### Copyright 2019 © Calvin Rose
-
-#
-# Common
-#
-
-(def- ext-peg
-  (peg/compile ~{:back (> -1 (+ (* ($) (set "\\/.")) :back))
-                 :main :back}))
-
-(defn ext
-  "Get the file extension for a path."
-  [path]
-  (if-let [m (peg/match ext-peg path (length path))]
-    (let [i (m 0)]
-      (if (= (path i) 46)
-        (string/slice path (m 0) -1)))))
-
-(defn- redef
-  "Redef a value, keeping all metadata."
-  [from to]
-  (setdyn (symbol to) (dyn (symbol from))))
-
-#
-# Generating Macros
-#
-
-(defmacro- decl-sep [pre sep] ~(def ,(symbol pre "/sep") ,sep))
-(defmacro- decl-delim [pre d] ~(def ,(symbol pre "/delim") ,d))
-
-(defmacro- decl-last-sep
-  [pre sep]
-  ~(def- ,(symbol pre "/last-sep-peg")
-    (peg/compile ~{:back (> -1 (+ (* ,sep ($)) :back))
-                   :main :back})))
-
-(defmacro- decl-basename
-  [pre]
-  ~(defn ,(symbol pre "/basename")
-    "Gets the base file name of a path."
-    [path]
-    (if-let [m (peg/match
-                 ,(symbol pre "/last-sep-peg")
-                 path
-                 (length path))]
-      (let [[p] m]
-        (string/slice path p -1))
-      path)))
-
-(defmacro- decl-parts
-  [pre sep]
-  ~(defn ,(symbol pre "/parts")
-     "Split a path into its parts."
-     [path]
-     (string/split ,sep path)))
-
-(defmacro- decl-normalize
-  [pre sep lead]
-  ~(defn ,(symbol pre "/normalize")
-     "Normalize a path. This removes . and .. in the
-     path, as well as empty path elements."
-     [path]
-     (def els (string/split ,sep path))
-     (def newparts @[])
-     (if (,(symbol pre "/abspath?") path) (array/push newparts ,lead))
-     (each part els
-       (case part
-         "" nil
-         "." nil
-         ".." (array/pop newparts)
-         (array/push newparts part)))
-     (string/join newparts ,sep)))
-
-(defmacro- decl-join
-  [pre sep]
-  ~(defn ,(symbol pre "/join")
-     "Join path elements together."
-     [& els]
-     (,(symbol pre "/normalize") (string/join els ,sep))))
-
-(defmacro- decl-abspath
-  [pre]
-  ~(defn ,(symbol pre "/abspath")
-     "Coerce a path to be absolute."
-     [path]
-     (if (,(symbol pre "/abspath?") path)
-       path
-       (,(symbol pre "/join") (os/cwd) path))))
-
-#
-# Posix
-#
-
-(defn posix/abspath?
-  "Check if a path is absolute."
-  [path]
-  (string/has-prefix? "/" path))
-
-(redef "ext" "posix/ext")
-(decl-sep "posix" "/")
-(decl-delim "posix" ":")
-(decl-last-sep "posix" "/")
-(decl-basename "posix")
-(decl-parts "posix" "/")
-(decl-normalize "posix" "/" "")
-(decl-join "posix" "/")
-(decl-abspath "posix")
-
-#
-# Windows
-#
-
-(def- abs-peg (peg/compile '(* (range "AZ") ":\\")))
-(defn win32/abspath?
-  "Check if a path is absolute."
-  [path]
-  (peg/match abs-peg path))
-
-(redef "ext" "win32/ext")
-(decl-sep "win32" "\\")
-(decl-delim "win32" ";")
-(decl-last-sep "win32" "\\")
-(decl-basename "win32")
-(decl-parts "win32" "\\")
-(decl-normalize "win32" "\\" "C:")
-(decl-join "win32" "\\")
-(decl-abspath "win32")
-
-#
-# Specialize for current OS
-#
-
-(def- syms
-  ["ext"
-   "sep"
-   "delim"
-   "basename"
-   "abspath?"
-   "abspath"
-   "parts"
-   "normalize"
-   "join"])
-(let [pre (if (= :windows (os/which)) "win32" "posix")]
-  (each sym syms
-    (redef (string pre "/" sym) sym)))

build_win.bat

@@ -19,40 +19,41 @@
 
 @rem Set compile and link options here
 @setlocal
-@set JANET_COMPILE=cl /nologo /Isrc\include /Isrc\conf /c /O2 /W3 /D_CRT_SECURE_NO_WARNINGS
+@set JANET_COMPILE=cl /nologo /Isrc\include /Isrc\conf /c /O2 /W3 /D_CRT_SECURE_NO_WARNINGS /MD
 @set JANET_LINK=link /nologo
 @set JANET_LINK_STATIC=lib /nologo
 
+@rem Add janet build tag
+if not "%JANET_BUILD%" == "" (
+    @set JANET_COMPILE=%JANET_COMPILE% /DJANET_BUILD="\"%JANET_BUILD%\""
+)
+
 mkdir build
 mkdir build\core
 mkdir build\mainclient
 mkdir build\boot
 
 @rem Build the xxd tool for generating sources
-@cl /nologo /c tools/xxd.c /Fobuild\xxd.obj
+cl /nologo /c tools/xxd.c /Fobuild\xxd.obj
 @if errorlevel 1 goto :BUILDFAIL
-@link /nologo /out:build\xxd.exe build\xxd.obj
+link /nologo /out:build\xxd.exe build\xxd.obj
 @if errorlevel 1 goto :BUILDFAIL
 
 @rem Generate the embedded sources
-@build\xxd.exe src\mainclient\init.janet build\init.gen.c janet_gen_init
-@if errorlevel 1 goto :BUILDFAIL
-@build\xxd.exe src\boot\boot.janet build\boot.gen.c janet_gen_boot
+build\xxd.exe src\boot\boot.janet build\boot.gen.c janet_gen_boot
 @if errorlevel 1 goto :BUILDFAIL
 
 @rem Build the generated sources
-@%JANET_COMPILE% /Fobuild\mainclient\init.gen.obj build\init.gen.c
-@if errorlevel 1 goto :BUILDFAIL
-@%JANET_COMPILE% /Fobuild\boot\boot.gen.obj build\boot.gen.c
+%JANET_COMPILE% /Fobuild\boot\boot.gen.obj build\boot.gen.c
 @if errorlevel 1 goto :BUILDFAIL
 
 @rem Build the bootstrap interpreter
 for %%f in (src\core\*.c) do (
-    @%JANET_COMPILE% /DJANET_BOOTSTRAP /Fobuild\boot\%%~nf.obj %%f
+    %JANET_COMPILE% /DJANET_BOOTSTRAP /Fobuild\boot\%%~nf.obj %%f
     @if errorlevel 1 goto :BUILDFAIL
 )
 for %%f in (src\boot\*.c) do (
-    @%JANET_COMPILE% /DJANET_BOOTSTRAP /Fobuild\boot\%%~nf.obj %%f
+    %JANET_COMPILE% /DJANET_BOOTSTRAP /Fobuild\boot\%%~nf.obj %%f
     @if errorlevel 1 goto :BUILDFAIL
 )
 %JANET_LINK% /out:build\janet_boot.exe build\boot\*.obj
@@ -60,12 +61,12 @@ for %%f in (src\boot\*.c) do (
 build\janet_boot build\core_image.c
 
 @rem Build the core image
-@%JANET_COMPILE% /Fobuild\core_image.obj build\core_image.c
+%JANET_COMPILE% /Fobuild\core_image.obj build\core_image.c
 @if errorlevel 1 goto :BUILDFAIL
 
 @rem Build the sources
 for %%f in (src\core\*.c) do (
-    @%JANET_COMPILE% /Fobuild\core\%%~nf.obj %%f
+    %JANET_COMPILE% /Fobuild\core\%%~nf.obj %%f
     @if errorlevel 1 goto :BUILDFAIL
 )
 
@@ -74,7 +75,7 @@ rc /nologo /fobuild\janet_win.res janet_win.rc
 
 @rem Build the main client
 for %%f in (src\mainclient\*.c) do (
-    @%JANET_COMPILE% /Fobuild\mainclient\%%~nf.obj %%f
+    %JANET_COMPILE% /Fobuild\mainclient\%%~nf.obj %%f
     @if errorlevel 1 goto :BUILDFAIL
 )
 
@@ -93,6 +94,11 @@ for %%f in (src\core\*.c) do (
     set "amalg_files=!amalg_files! %%f"
 )
 janet.exe tools\amalg.janet src\core\util.h src\core\state.h src\core\gc.h src\core\vector.h src\core\fiber.h src\core\regalloc.h src\core\compile.h src\core\emit.h src\core\symcache.h %amalg_files% build\core_image.c > build\janet.c
+janet.exe tools\removecr.janet build\janet.c
+
+@rem Gen shell.c
+janet.exe tools\amalg.janet src\mainclient\line.h src\mainclient\line.c src\mainclient\main.c > build\shell.c
+janet.exe tools\removecr.janet build\shell.c
 
 echo === Successfully built janet.exe for Windows ===
 echo === Run 'build_win test' to run tests. ==
@@ -132,8 +138,10 @@ exit /b 0
 :DIST
 mkdir dist
 janet.exe tools\gendoc.janet > dist\doc.html
+janet.exe tools\removecr.janet dist\doc.html
 
 copy build\janet.c dist\janet.c
+copy build\shell.c dist\shell.c
 copy janet.exe dist\janet.exe
 copy LICENSE dist\LICENSE
 copy README.md dist\README.md
@@ -145,14 +153,16 @@ copy src\include\janet.h dist\janet.h
 copy src\conf\janetconf.h dist\janetconf.h
 copy build\libjanet.lib dist\libjanet.lib
 
-copy auxlib\cook.janet dist\cook.janet
-copy auxlib\path.janet dist\path.janet
-
 copy auxbin\jpm dist\jpm
 copy tools\jpm.bat dist\jpm.bat
 
 @rem Create installer
-"C:\Program Files (x86)\NSIS\makensis.exe" janet-installer.nsi
+janet.exe -e "(->> janet/version (peg/match ''(* :d+ `.` :d+ `.` :d+)) first print)" > build\version.txt
+janet.exe -e "(print (= (os/arch) :x64))" > build\64bit.txt
+set /p JANET_VERSION= < build\version.txt
+set /p SIXTYFOUR= < build\64bit.txt
+echo "JANET_VERSION is %JANET_VERSION%"
+"C:\Program Files (x86)\NSIS\makensis.exe" /DVERSION=%JANET_VERSION% /DSIXTYFOUR=%SIXTYFOUR% janet-installer.nsi 
 exit /b 0
 
 @rem Run the installer. (Installs to the local user with default settings)
@@ -167,12 +177,30 @@ exit /b 0
 :TESTINSTALL
 pushd test\install
 call jpm clean
-@if errorlevel 1 goto :TESTFAIL
+@if errorlevel 1 goto :TESTINSTALLFAIL
 call jpm test
-@if errorlevel 1 goto :TESTFAIL
+@if errorlevel 1 goto :TESTINSTALLFAIL
+call jpm --verbose --modpath=. install https://github.com/janet-lang/json.git
+@if errorlevel 1 goto :TESTINSTALLFAIL
+call build\testexec
+@if errorlevel 1 goto :TESTINSTALLFAIL
+call jpm --verbose quickbin testexec.janet build\testexec2.exe
+@if errorlevel 1 goto :TESTINSTALLFAIL
+call build\testexec2.exe
+@if errorlevel 1 goto :TESTINSTALLFAIL
+call jpm --verbose --test --modpath=. install https://github.com/janet-lang/jhydro.git
+@if errorlevel 1 goto :TESTINSTALLFAIL
+call jpm --verbose --test --modpath=. install https://github.com/janet-lang/path.git
+@if errorlevel 1 goto :TESTINSTALLFAIL
+call jpm --verbose --test --modpath=. install https://github.com/janet-lang/argparse.git
+@if errorlevel 1 goto :TESTINSTALLFAIL
 popd
 exit /b 0
 
+:TESTINSTALLFAIL
+popd
+goto :TESTFAIL
+
 @rem build, test, dist, install. Useful for local dev.
 :ALL
 call %0 build

examples/debug.janet

@@ -0,0 +1,11 @@
+# Load this file and run (myfn) to see the debugger
+
+(defn myfn
+  []
+  (debug)
+  (for i 0 10 (print i)))
+
+(debug/fbreak myfn 3)
+
+# Enable debugging in repl with
+# (setdyn :debug true)

examples/debugger.janet

@@ -0,0 +1,153 @@
+###
+### A useful debugger library for Janet. Should be used
+### inside a debug repl.
+###
+
+(defn .fiber
+  "Get the current fiber being debugged."
+  []
+  (if-let [entry (dyn '_fiber)]
+    (entry :value)
+    (dyn :fiber)))
+
+(defn .stack
+  "Print the current fiber stack"
+  []
+  (print)
+  (debug/stacktrace (.fiber) "")
+  (print))
+
+(defn .frame
+  "Show a stack frame"
+  [&opt n]
+  (def stack (debug/stack (.fiber)))
+  (in stack (or n 0)))
+
+(defn .fn
+  "Get the current function"
+  [&opt n]
+  (in (.frame n) :function))
+
+(defn .slots
+  "Get an array of slots in a stack frame"
+  [&opt n]
+  (in (.frame n) :slots))
+
+(defn .slot
+  "Get the value of the nth slot."
+  [&opt nth frame-idx]
+  (in (.slots frame-idx) (or nth 0)))
+
+(defn .quit
+  "Resume (dyn :fiber) with the value passed to it after exiting the debugger."
+  [&opt val]
+  (setdyn :exit true)
+  (setdyn :resume-value val)
+  nil)
+
+(defn .disasm
+  "Gets the assembly for the current function."
+  [&opt n]
+  (def frame (.frame n))
+  (def func (frame :function))
+  (disasm func))
+
+(defn .bytecode
+  "Get the bytecode for the current function."
+  [&opt n]
+  ((.disasm n) 'bytecode))
+
+(defn .ppasm
+  "Pretty prints the assembly for the current function"
+  [&opt n]
+  (def frame (.frame n))
+  (def func (frame :function))
+  (def dasm (disasm func))
+  (def bytecode (dasm 'bytecode))
+  (def pc (frame :pc))
+  (def sourcemap (dasm 'sourcemap))
+  (var last-loc [-2 -2])
+  (print "\n  function:   " (dasm 'name) " [" (in dasm 'source "") "]")
+  (when-let [constants (dasm 'constants)]
+    (printf "  constants:  %.4Q" constants))
+  (printf "  slots:      %.4Q\n" (frame :slots))
+  (def padding (string/repeat " " 20))
+  (loop [i :range [0 (length bytecode)]
+         :let [instr (bytecode i)]]
+    (prin (if (= (tuple/type instr) :brackets) "*" " "))
+    (prin (if (= i pc) "> " "  "))
+    (prinf "\e[33m%.20s\e[0m" (string (string/join (map string instr) " ") padding))
+    (when sourcemap
+      (let [[sl sc] (sourcemap i)
+            loc [sl sc]]
+        (when (not= loc last-loc)
+          (set last-loc loc)
+          (prin " # line " sl ", column " sc))))
+    (print))
+  (print))
+
+(defn .source
+  "Show the source code for the function being debugged."
+  [&opt n]
+  (def frame (.frame n))
+  (def s (frame :source))
+  (def all-source (slurp s))
+  (print "\n\e[33m" all-source "\e[0m\n"))
+
+(defn .breakall
+  "Set breakpoints on all instructions in the current function."
+  [&opt n]
+  (def fun (.fn n))
+  (def bytecode (.bytecode n))
+  (for i 0 (length bytecode)
+    (debug/fbreak fun i))
+  (print "Set " (length bytecode) " breakpoints in " fun))
+
+(defn .clearall
+  "Clear all breakpoints on the current function."
+  [&opt n]
+  (def fun (.fn n))
+  (def bytecode (.bytecode n))
+  (for i 0 (length bytecode)
+    (debug/unfbreak fun i))
+  (print "Cleared " (length bytecode) " breakpoints in " fun))
+
+(defn .break
+  "Set breakpoint at the current pc."
+  []
+  (def frame (.frame))
+  (def fun (frame :function))
+  (def pc (frame :pc))
+  (debug/fbreak fun pc)
+  (print "Set breakpoint in " fun " at pc=" pc))
+
+(defn .clear
+  "Clear the current breakpoint"
+  []
+  (def frame (.frame))
+  (def fun (frame :function))
+  (def pc (frame :pc))
+  (debug/unfbreak fun pc)
+  (print "Cleared breakpoint in " fun " at pc=" pc))
+
+(defn .next
+  "Go to the next breakpoint."
+  [&opt n]
+  (var res nil)
+  (for i 0 (or n 1)
+    (set res (resume (.fiber))))
+  res)
+
+(defn .nextc
+  "Go to the next breakpoint, clearing the current breakpoint."
+  [&opt n]
+  (.clear)
+  (.next n))
+
+(defn .step
+  "Execute the next n instructions."
+  [&opt n]
+  (var res nil)
+  (for i 0 (or n 1)
+    (set res (debug/step (.fiber))))
+  res)

examples/rtest.janet

@@ -0,0 +1,11 @@
+# How random is the RNG really?
+
+(def counts (seq [_ :range [0 100]] 0))
+
+(for i 0 1000000
+  (let [x (math/random)
+        intrange (math/floor (* 100 x))
+        oldcount (counts intrange)]
+    (put counts intrange (if oldcount (+ 1 oldcount) 1))))
+
+(pp counts)

examples/tarray.janet

@@ -1,7 +1,5 @@
 # naive matrix implementation for testing typed array
 
-(defmacro printf [& xs] ['print ['string/format (splice xs)]])
-
 (defn matrix [nrow ncol] {:nrow nrow :ncol ncol :array (tarray/new :float64 (* nrow ncol))})
 
 (defn matrix/row [mat i]
@@ -34,22 +32,21 @@
   ((matrix/row mat i) j))
 
 (defn matrix/get** [mat i j value]
-  ((matrix/column j) i))
+  ((matrix/column mat j) i))
 
 
-(defn tarray/print [array]
-  (def size (tarray/length array))
-  (def buf @"")
-  (buffer/format buf "[%2i]" size)
+(defn tarray/print [arr]
+  (def size (tarray/length arr))
+  (prinf "[%2i]" size)
   (for i 0 size
-       (buffer/format buf " %+6.3f " (array i)))
-  (print buf))
-       
+    (prinf " %+6.3f " (arr i)))
+  (print))
+
 (defn matrix/print [mat]
   (def {:nrow nrow :ncol ncol :array tarray} mat)
   (printf "matrix %iX%i %p" nrow ncol tarray)
   (for i 0 nrow
-       (tarray/print (matrix/row mat i))))
+    (tarray/print (matrix/row mat i))))
 
 
 (def nr 5)
@@ -57,27 +54,20 @@
 (def A (matrix nr nc))
 
 (loop (i :range (0 nr) j :range (0 nc)) 
-      (matrix/set A i j i))
+  (matrix/set A i j i))
 (matrix/print A)
 
 (loop (i :range (0 nr) j :range (0 nc)) 
-      (matrix/set* A i j i))
+  (matrix/set* A i j i))
 (matrix/print A)
 
 (loop (i :range (0 nr) j :range (0 nc)) 
-      (matrix/set** A i j i))
+  (matrix/set** A i j i))
 (matrix/print A)
 
 
 (printf "properties:\n%p" (tarray/properties (A :array)))
 (for i 0 nr  
-     (printf "row properties:[%i]\n%p" i (tarray/properties (matrix/row A i))))
+  (printf "row properties:[%i]\n%p" i (tarray/properties (matrix/row A i))))
 (for i 0 nc  
-     (printf "col properties:[%i]\n%p" i (tarray/properties (matrix/column A i))))
-
-
-
-
-
-
-
+  (printf "col properties:[%i]\n%p" i (tarray/properties (matrix/column A i))))

examples/threads.janet

@@ -0,0 +1,68 @@
+(defn worker-main
+  "Sends 11 messages back to parent"
+  [parent]
+  (def name (thread/receive))
+  (def interval (thread/receive))
+  (for i 0 10
+    (os/sleep interval)
+    (:send parent (string/format "thread %s wakeup no. %d" name i)))
+  (:send parent name))
+
+(defn make-worker
+  [name interval]
+  (-> (thread/new worker-main)
+      (:send name)
+      (:send interval)))
+
+(def bob (make-worker "bob" 0.02))
+(def joe (make-worker "joe" 0.03))
+(def sam (make-worker "sam" 0.05))
+
+# Receive out of order
+(for i 0 33
+  (print (thread/receive)))
+
+#
+# Recursive Thread Tree - should pause for a bit, and then print a cool zigzag.
+#
+
+(def rng (math/rng (os/cryptorand 16)))
+
+(defn choose [& xs]
+  (in xs (:int rng (length xs))))
+
+(defn worker-tree
+  [parent]
+  (def name (thread/receive))
+  (def depth (thread/receive))
+  (if (< depth 5)
+    (do
+    (defn subtree []
+      (-> (thread/new worker-tree)
+          (:send (string name "/" (choose "bob" "marley" "harry" "suki" "anna" "yu")))
+          (:send (inc depth))))
+    (let [l (subtree)
+          r (subtree)
+          lrep (thread/receive)
+          rrep (thread/receive)]
+      (:send parent [name ;lrep ;rrep])))
+    (do
+      (:send parent [name]))))
+
+(-> (thread/new worker-tree) (:send "adam") (:send 0))
+(def lines (thread/receive))
+(map print lines)
+
+#
+# Receive timeout
+#
+
+(def slow (make-worker "slow-loras" 0.5))
+(for i 0 50
+  (try
+    (let [msg (thread/receive 0.1)]
+      (print "\n" msg))
+    ([err] (prin ".") (:flush stdout))))
+
+(print "\ndone timing, timeouts ending.")
+(try (while true (print (thread/receive))) ([err] (print "done")))

janet-installer.nsi

@@ -1,5 +1,4 @@
 # Version
-!define VERSION "1.2.0"
 !define PRODUCT_VERSION "${VERSION}.0"
 VIProductVersion "${PRODUCT_VERSION}"
 VIFileVersion "${PRODUCT_VERSION}"
@@ -14,8 +13,9 @@ VIFileVersion "${PRODUCT_VERSION}"
 !define MULTIUSER_INSTALLMODE_INSTDIR_REGISTRY_VALUENAME ""
 !define MULTIUSER_INSTALLMODE_INSTDIR "Janet-${VERSION}"
 
-# For now, use 32 bit folder as build is 32 bit
-# !define MULTIUSER_USE_PROGRAMFILES64
+!if ${SIXTYFOUR} == "true"
+    !define MULTIUSER_USE_PROGRAMFILES64
+!endif
 
 # Includes
 !include "MultiUser.nsh"
@@ -25,7 +25,19 @@ VIFileVersion "${PRODUCT_VERSION}"
 
 # Basics
 Name "Janet"
-OutFile "janet-v${VERSION}-windows-installer.exe"
+
+# Do some NSIS-fu to figure out at compile time if we are in appveyor
+!define OUTNAME $%APPVEYOR_REPO_TAG_NAME%
+!define "CHECK_${OUTNAME}"
+!define DOLLAR "$"
+!ifdef CHECK_${DOLLAR}%APPVEYOR_REPO_TAG_NAME%
+    # We are not in the appveyor environment, use version name
+    !define OUTNAME_PART v${VERSION}
+!else
+    # We are in appveyor, use git tag name for installer
+    !define OUTNAME_PART ${OUTNAME}
+!endif
+OutFile "janet-${OUTNAME_PART}-windows-installer.exe"
 
 # Some Configuration
 !define APPNAME "Janet"
@@ -91,10 +103,6 @@ section "Janet" BfWSection
     file /oname=bin\jpm.janet auxbin\jpm
     file /oname=bin\jpm.bat tools\jpm.bat
 
-    # Modules
-    file /oname=Library\cook.janet auxlib\cook.janet
-    file /oname=Library\path.janet auxlib\path.janet
-
     # C headers and library files
     file /oname=C\janet.h dist\janet.h
     file /oname=C\janetconf.h dist\janetconf.h

jpm.1

@@ -0,0 +1,207 @@
+.TH JPM 1
+.SH NAME
+jpm \- the Janet Project Manager, a build tool for Janet 
+.SH SYNOPSIS
+.B jpm
+[\fB\-\-flag ...\fR]
+[\fB\-\-option=value ...\fR]
+.IR command
+.IR args ...
+.SH DESCRIPTION
+jpm is the build tool that ships with a standard Janet install. It is
+used for building Janet projects, installing dependencies, installing
+projects, building native modules, and exporting your Janet project to a
+standalone executable. Although not required for working with Janet, it
+removes much of the boilerplate with installing dependencies and
+building native modules. jpm requires only Janet to run, and uses git
+to install dependencies (jpm will work without git installed).
+.SH DOCUMENTATION
+
+jpm has several subcommands, each used for managing either a single Janet project or
+all Janet modules installed on the system. Global commands, those that manage modules
+at the system level, do things like install and uninstall packages, as well as clear the cache.
+More interesting are the local commands. For more information on jpm usage, see https://janet-lang.org/docs/index.html
+
+.SH FLAGS
+
+.TP
+.BR \-\-verbose
+Print detailed messages of what jpm is doing, including compilation commands and other shell commands.
+
+.TP
+.BR \-\-test
+If passed to jpm install, runs tests before installing. Will run tests recursively on dependencies.
+
+.SH OPTIONS
+
+.TP
+.BR \-\-modpath=/some/path
+Set the path to install modules to. Defaults to $JANET_MODPATH, $JANET_PATH, or (dyn :syspath) in that order. You most likely don't need this.
+
+.TP
+.BR \-\-headerpath=/some/path
+Set the path the jpm will include when building C source code. This lets
+you specify the location of janet.h and janetconf.h on your system. On a
+normal install, this option is not needed.
+
+.TP
+.BR \-\-binpath=/some/path
+Set the path that jpm will install scripts and standalone executables to. Executables
+defined via declare-execuatble or scripts declared via declare-binscript will be installed
+here when jpm install is run. Defaults to $JANET_BINPATH, or a reasonable default for the system.
+See JANET_BINPATH for more.
+
+.TP
+.BR \-\-libpath=/some/path
+Sets the path jpm will use to look for libjanet.a for building standalone executables. libjanet.so
+is \fBnot\fR used for building native modules or standalone executables, only
+for linking into applications that want to embed janet as a dynamic module.
+Linking statically might be a better idea, even in that case. Defaults to
+$JANET_LIBPATH, or a reasonable default. See JANET_LIBPATH for more.
+
+.TP
+.BR \-\-compiler=$CC
+Sets the compiler used for compiling native modules and standalone executables. Defaults
+to cc.
+
+.TP
+.BR \-\-linker
+Sets the linker used to create native modules and executables. Only used on windows, where
+it defaults to link.exe.
+
+.TP
+.BR \-\-pkglist=https://github.com/janet-lang/pkgs.git
+Sets the git repository for the package listing used to resolve shorthand package names.
+
+.TP
+.BR \-\-archiver=$AR
+Sets the command used for creating static libraries, use for linking into the standalone executable.
+Native modules are compiled twice, once a normal native module (shared object), and once as an
+archive. Defaults to ar.
+
+.SH COMMANDS
+.TP
+.BR help
+Shows the usage text and exits immediately.
+
+.TP
+.BR build
+Builds all artifacts specified in the project.janet file in the current directory. Artifacts will
+be created in the ./build/ directory.
+
+.TP
+.BR install\ [\fBrepo\fR]
+
+When run with no arguments, installs all installable artifacts in the current project to
+the current JANET_MODPATH for modules and JANET_BINPATH for executables and scripts. Can also
+take an optional git repository URL and will install all artifacts in that repository instead.
+When run with an argument, install does not need to be run from a jpm project directory.
+
+.TP
+.BR uninstall\ [\fBname\fR]
+Uninstall a project installed with install. uninstall expects the name of the project, not the
+repository url, path to installed file or executable name. The name of the project must be specified
+at the top of the project.janet file in the declare-project form. If no name is given, uninstalls
+the current project if installed.
+
+.TP
+.BR clean
+Remove all artifacts created by jpm. This just deletes the build folder.
+
+.TP
+.BR test
+Runs jpm tests. jpm will run all janet source files in the test directory as tests. A test
+is considered failing if it exits with a non-zero exit code.
+
+.TP
+.BR deps
+Install all dependencies that this project requires recursively. jpm does not
+resolve dependency issues, like conflicting versions of the same module are required, or
+different modules with the same name. Dependencies are installed with git, so deps requires
+git to be on the PATH.
+
+.TP
+.BR clear-cache
+jpm caches git repositories that are needed to install modules from a remote
+source in a global cache ($JANET_PATH/.cache). If these dependencies are out of
+date or too large, clear-cache will remove the cache and jpm will rebuild it
+when needed. clear-cache is a global command, so a project.janet is not
+required.
+
+.TP
+.BR run\ [\fBrule\fR]
+Run a given rule defined in project.janet. Project definitions files (project.janet) usually
+contain a few artifact declarations, which set up rules that jpm can then resolve, or execute.
+A project.janet can also create custom rules to create arbitrary files or run arbitrary code, much
+like make. run will run a single rule or build a single file.
+
+.TP
+.BR rules
+List all rules that can be run via run. This is useful for exploring rules in the project.
+
+.TP
+.BR show-paths
+Show all of the paths used when installing and building artifacts.
+
+.TP
+.BR update-pkgs
+Update the package listing by installing the 'pkgs' package. Same as jpm install pkgs
+
+.TP
+.BR quickbin [\fBentry\fR] [\fBexecutable\fR]
+Create a standalone, statically linked executable from a Janet source file that contains a main function.
+The main function is the entry point of the program and will receive command line arguments
+as function arguments. The entry file can import other modules, including native C modules, and
+jpm will attempt to include the dependencies into the generated executable.
+
+.SH ENVIRONMENT
+
+.B JANET_PATH
+.RS
+The location to look for Janet libraries. This is the only environment variable Janet needs to
+find native and source code modules. If no JANET_PATH is set, Janet will look in
+the default location set at compile time, which can be determined with (dyn :syspath)
+.RE
+
+.B JANET_MODPATH
+.RS
+The location that jpm will use to install libraries to. Defaults to JANET_PATH, but you could
+set this to a different directory if you want to. Doing so would let you import Janet modules
+on the normal system path (JANET_PATH or (dyn :syspath)), but install to a different directory. It is also a more reliable way to install
+This variable is overwritten by the --modpath=/some/path if it is provided.
+.RE
+
+.B JANET_HEADERPATH
+.RS
+The location that jpm will look for janet header files (janet.h and janetconf.h) that are used
+to build native modules and standalone executables. If janet.h and janetconf.h are available as
+default includes on your system, this value is not required. If not provided, will default to
+<jpm script location>/../include/janet. The --headerpath=/some/path option will override this
+variable.
+.RE
+
+.B JANET_LIBPATH
+.RS
+Similar to JANET_HEADERPATH, this path is where jpm will look for
+libjanet.a for creating standalong executables. This does not need to be
+set on a normal install. 
+If not provided, this will default to <jpm script location>/../lib.
+The --libpath=/some/path option will override this variable.
+.RE
+
+.B JANET_BINPATH
+.RS
+The directory where jpm will install binary scripts and executables to.
+Defaults to
+(dyn :syspath)/bin
+The --binpath=/some/path will override this variable.
+.RE
+
+.B JANET_PKGLIST
+.RS
+The git repository URL that contains a listing of packages. This allows installing packages with shortnames, which
+is mostly a convenience. However, package dependencies can use short names, package listings
+can be used to choose a particular set of dependency versions for a whole project.
+
+.SH AUTHOR
+Written by Calvin Rose <calsrose@gmail.com>

meson.build

@@ -20,7 +20,7 @@
 
 project('janet', 'c',
   default_options : ['c_std=c99', 'b_lundef=false', 'default_library=both'],
-  version : '1.2.0')
+  version : '1.6.0')
 
 # Global settings
 janet_path = join_paths(get_option('prefix'), get_option('libdir'), 'janet')
@@ -30,6 +30,7 @@ header_path = join_paths(get_option('prefix'), get_option('includedir'), 'janet'
 cc = meson.get_compiler('c')
 m_dep = cc.find_library('m', required : false)
 dl_dep = cc.find_library('dl', required : false)
+thread_dep = dependency('threads')
 
 # Link options
 if build_machine.system() != 'windows'
@@ -52,7 +53,7 @@ conf.set_quoted('JANET_VERSION', meson.project_version())
 # Use options
 conf.set_quoted('JANET_BUILD', get_option('git_hash'))
 conf.set('JANET_NO_NANBOX', not get_option('nanbox'))
-conf.set('JANET_SINGLE_THREADED', not get_option('single_threaded'))
+conf.set('JANET_SINGLE_THREADED', get_option('single_threaded'))
 conf.set('JANET_NO_DYNAMIC_MODULES', not get_option('dynamic_modules'))
 conf.set('JANET_NO_DOCSTRINGS', not get_option('docstrings'))
 conf.set('JANET_NO_SOURCEMAPS', not get_option('sourcemaps'))
@@ -65,6 +66,12 @@ conf.set('JANET_RECURSION_GUARD', get_option('recursion_guard'))
 conf.set('JANET_MAX_PROTO_DEPTH', get_option('max_proto_depth'))
 conf.set('JANET_MAX_MACRO_EXPAND', get_option('max_macro_expand'))
 conf.set('JANET_STACK_MAX', get_option('stack_max'))
+if get_option('os_name') != ''
+  conf.set('JANET_OS_NAME', get_option('os_name'))
+endif
+if get_option('arch_name') != ''
+  conf.set('JANET_ARCH_NAME', get_option('arch_name'))
+endif
 jconf = configure_file(output : 'janetconf.h',
   configuration : conf)
 
@@ -77,7 +84,6 @@ gen = generator(xxd,
   output : '@BASENAME@.gen.c',
   arguments : ['@INPUT@', '@OUTPUT@', '@EXTRA_ARGS@'])
 boot_gen = gen.process('src/boot/boot.janet', extra_args: 'janet_gen_boot')
-init_gen = gen.process('src/mainclient/init.janet', extra_args: 'janet_gen_init')
 
 # Order is important here, as some headers
 # depend on other headers for the amalg target
@@ -123,6 +129,7 @@ core_src = [
   'src/core/struct.c',
   'src/core/symcache.c',
   'src/core/table.c',
+  'src/core/thread.c',
   'src/core/tuple.c',
   'src/core/typedarray.c',
   'src/core/util.c',
@@ -150,7 +157,7 @@ mainclient_src = [
 janet_boot = executable('janet-boot', core_src, boot_src, boot_gen,
   include_directories : incdir,
   c_args : '-DJANET_BOOTSTRAP',
-  dependencies : [m_dep, dl_dep],
+  dependencies : [m_dep, dl_dep, thread_dep],
   native : true)
 
 # Build core image
@@ -161,18 +168,35 @@ core_image = custom_target('core_image',
 
 libjanet = library('janet', core_src, core_image,
   include_directories : incdir,
-  dependencies : [m_dep, dl_dep],
+  dependencies : [m_dep, dl_dep, thread_dep],
   install : true)
 
-janet_mainclient = executable('janet', core_src, core_image, init_gen, mainclient_src,
+# Extra c flags - adding -fvisibility=hidden matches the Makefile and
+# shaves off about 10k on linux x64, likely similar on other platforms.
+native_cc = meson.get_compiler('c', native: true)
+cross_cc = meson.get_compiler('c', native: false)
+if native_cc.has_argument('-fvisibility=hidden')
+  extra_native_cflags = ['-fvisibility=hidden']
+else
+  extra_native_cflags = []
+endif
+if cross_cc.has_argument('-fvisibility=hidden')
+  extra_cross_cflags = ['-fvisibility=hidden']
+else
+  extra_cross_cflags = []
+endif
+
+janet_mainclient = executable('janet', core_src, core_image, mainclient_src,
   include_directories : incdir,
-  dependencies : [m_dep, dl_dep],
+  dependencies : [m_dep, dl_dep, thread_dep],
+  c_args : extra_native_cflags,
   install : true)
 
 if meson.is_cross_build()
-  janet_nativeclient = executable('janet-native', core_src, core_image, init_gen, mainclient_src,
+  janet_nativeclient = executable('janet-native', core_src, core_image, mainclient_src,
     include_directories : incdir,
-    dependencies : [m_dep, dl_dep],
+    dependencies : [m_dep, dl_dep, thread_dep],
+    c_args : extra_cross_cflags,
     native : true)
 else
   janet_nativeclient = janet_mainclient
@@ -191,11 +215,17 @@ amalg = custom_target('amalg',
   output : ['janet.c'],
   capture : true,
   command : [janet_nativeclient, '@INPUT@'])
+amalg_shell = custom_target('amalg-shell',
+  input : ['tools/amalg.janet', 'src/mainclient/line.h',
+    'src/mainclient/line.c', 'src/mainclient/main.c'],
+  output : ['shell.c'],
+  capture : true,
+  command : [janet_nativeclient, '@INPUT@'])
 
 # Amalgamated client
-janet_amalgclient = executable('janet-amalg', amalg, init_gen, mainclient_src,
+janet_amalgclient = executable('janet-amalg', amalg, amalg_shell,
   include_directories : incdir,
-  dependencies : [m_dep, dl_dep],
+  dependencies : [m_dep, dl_dep, thread_dep],
   build_by_default : false)
 
 # Tests
@@ -222,13 +252,10 @@ janet_dep = declare_dependency(include_directories : incdir,
 
 # Installation
 install_man('janet.1')
+install_man('jpm.1')
 install_headers(['src/include/janet.h', jconf], subdir: 'janet')
-janet_libs = [
-  'auxlib/cook.janet',
-  'auxlib/path.janet'
-]
 janet_binscripts = [
   'auxbin/jpm'
 ]
-install_data(sources : janet_libs, install_dir : janet_path)
 install_data(sources : janet_binscripts, install_dir : 'bin')
+install_data(sources : ['tools/.keep'], install_dir : 'lib/janet')

meson_options.txt

@@ -14,4 +14,7 @@ option('int_types', type : 'boolean', value : true)
 option('recursion_guard', type : 'integer', min : 10, max : 8000, value : 1024)
 option('max_proto_depth', type : 'integer', min : 10, max : 8000, value : 200)
 option('max_macro_expand', type : 'integer', min : 1, max : 8000, value : 200)
-option('stack_max', type : 'integer', min : 8096, max : 1000000000, value : 16384)
+option('stack_max', type : 'integer', min : 8096, max : 0x7fffffff, value : 0x7fffffff)
+
+option('arch_name', type : 'string', value: '')
+option('os_name', type : 'string', value: '')

src/conf/janetconf.h

@@ -27,10 +27,10 @@
 #define JANETCONF_H
 
 #define JANET_VERSION_MAJOR 1
-#define JANET_VERSION_MINOR 2
+#define JANET_VERSION_MINOR 6
 #define JANET_VERSION_PATCH 0
 #define JANET_VERSION_EXTRA ""
-#define JANET_VERSION "1.2.0"
+#define JANET_VERSION "1.6.0"
 
 /* #define JANET_BUILD "local" */
 
@@ -56,5 +56,7 @@
 /* #define JANET_MAX_PROTO_DEPTH 200 */
 /* #define JANET_MAX_MACRO_EXPAND 200 */
 /* #define JANET_STACK_MAX 16384 */
+/* #define JANET_OS_NAME my-custom-os */
+/* #define JANET_ARCH_NAME pdp-8 */
 
 #endif /* end of include guard: JANETCONF_H */

src/core/array.c

@@ -64,7 +64,9 @@ void janet_array_ensure(JanetArray *array, int32_t capacity, int32_t growth) {
     Janet *newData;
     Janet *old = array->data;
     if (capacity <= array->capacity) return;
-    capacity *= growth;
+    int64_t new_capacity = ((int64_t) capacity) * growth;
+    if (new_capacity > INT32_MAX) new_capacity = INT32_MAX;
+    capacity = (int32_t) new_capacity;
     newData = realloc(old, capacity * sizeof(Janet));
     if (NULL == newData) {
         JANET_OUT_OF_MEMORY;
@@ -123,6 +125,28 @@ static Janet cfun_array_new(int32_t argc, Janet *argv) {
     return janet_wrap_array(array);
 }
 
+static Janet cfun_array_new_filled(int32_t argc, Janet *argv) {
+    janet_arity(argc, 1, 2);
+    int32_t count = janet_getinteger(argv, 0);
+    Janet x = (argc == 2) ? argv[1] : janet_wrap_nil();
+    JanetArray *array = janet_array(count);
+    for (int32_t i = 0; i < count; i++) {
+        array->data[i] = x;
+    }
+    array->count = count;
+    return janet_wrap_array(array);
+}
+
+static Janet cfun_array_fill(int32_t argc, Janet *argv) {
+    janet_arity(argc, 1, 2);
+    JanetArray *array = janet_getarray(argv, 0);
+    Janet x = (argc == 2) ? argv[1] : janet_wrap_nil();
+    for (int32_t i = 0; i < array->count; i++) {
+        array->data[i] = x;
+    }
+    return argv[0];
+}
+
 static Janet cfun_array_pop(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 1);
     JanetArray *array = janet_getarray(argv, 0);
@@ -156,8 +180,8 @@ static Janet cfun_array_ensure(int32_t argc, Janet *argv) {
 }
 
 static Janet cfun_array_slice(int32_t argc, Janet *argv) {
-    JanetRange range = janet_getslice(argc, argv);
     JanetView view = janet_getindexed(argv, 0);
+    JanetRange range = janet_getslice(argc, argv);
     JanetArray *array = janet_array(range.end - range.start);
     if (array->data)
         memcpy(array->data, view.items + range.start, sizeof(Janet) * (range.end - range.start));
@@ -241,6 +265,17 @@ static const JanetReg array_cfuns[] = {
              "Creates a new empty array with a pre-allocated capacity. The same as "
              "(array) but can be more efficient if the maximum size of an array is known.")
     },
+    {
+        "array/new-filled", cfun_array_new_filled,
+        JDOC("(array/new-filled count &opt value)\n\n"
+             "Creates a new array of count elements, all set to value, which defaults to nil. Returns the new array.")
+    },
+    {
+        "array/fill", cfun_array_fill,
+        JDOC("(array/fill arr &opt value)\n\n"
+             "Replace all elements of an array with value (defaulting to nil) without changing the length of the array. "
+             "Returns the modified array.")
+    },
     {
         "array/pop", cfun_array_pop,
         JDOC("(array/pop arr)\n\n"
@@ -259,11 +294,11 @@ static const JanetReg array_cfuns[] = {
     },
     {
         "array/ensure", cfun_array_ensure,
-        JDOC("(array/ensure arr capacity)\n\n"
+        JDOC("(array/ensure arr capacity growth)\n\n"
              "Ensures that the memory backing the array is large enough for capacity "
-             "items. Capacity must be an integer. If the backing capacity is already enough, "
-             "then this function does nothing. Otherwise, the backing memory will be reallocated "
-             "so that there is enough space.")
+             "items at the given rate of growth. Capacity and growth must be integers. "
+             "If the backing capacity is already enough, then this function does nothing. "
+             "Otherwise, the backing memory will be reallocated so that there is enough space.")
     },
     {
         "array/slice", cfun_array_slice,
@@ -271,7 +306,8 @@ static const JanetReg array_cfuns[] = {
              "Takes a slice of array or tuple from start to end. The range is half open, "
              "[start, end). Indexes can also be negative, indicating indexing from the end of the "
              "end of the array. By default, start is 0 and end is the length of the array. "
-             "Returns a new array.")
+             "Note that index -1 is synonymous with index (length arrtup) to allow a full "
+             "negative slice range. Returns a new array.")
     },
     {
         "array/concat", cfun_array_concat,

src/core/asm.c

@@ -85,6 +85,7 @@ static const JanetInstructionDef janet_ops[] = {
     {"gten", JOP_NUMERIC_GREATER_THAN_EQUAL},
     {"gtim", JOP_GREATER_THAN_IMMEDIATE},
     {"gtn", JOP_NUMERIC_GREATER_THAN},
+    {"in", JOP_IN},
     {"jmp", JOP_JUMP},
     {"jmpif", JOP_JUMP_IF},
     {"jmpno", JOP_JUMP_IF_NOT},
@@ -172,17 +173,25 @@ static void janet_asm_deinit(JanetAssembler *a) {
     janet_table_deinit(&a->defs);
 }
 
+static void janet_asm_longjmp(JanetAssembler *a) {
+#if defined(JANET_BSD) || defined(JANET_APPLE)
+    _longjmp(a->on_error, 1);
+#else
+    longjmp(a->on_error, 1);
+#endif
+}
+
 /* Throw some kind of assembly error */
 static void janet_asm_error(JanetAssembler *a, const char *message) {
     a->errmessage = janet_formatc("%s, instruction %d", message, a->errindex);
-    longjmp(a->on_error, 1);
+    janet_asm_longjmp(a);
 }
 #define janet_asm_assert(a, c, m) do { if (!(c)) janet_asm_error((a), (m)); } while (0)
 
 /* Throw some kind of assembly error */
 static void janet_asm_errorv(JanetAssembler *a, const uint8_t *m) {
     a->errmessage = m;
-    longjmp(a->on_error, 1);
+    janet_asm_longjmp(a);
 }
 
 /* Add a closure environment to the assembler. Sub funcdefs may need
@@ -500,10 +509,14 @@ static JanetAssembleResult janet_asm1(JanetAssembler *parent, Janet source, int
     janet_table_init(&a.defs, 0);
 
     /* Set error jump */
+#if defined(JANET_BSD) || defined(JANET_APPLE)
+    if (_setjmp(a.on_error)) {
+#else
     if (setjmp(a.on_error)) {
+#endif
         if (NULL != a.parent) {
             janet_asm_deinit(&a);
-            longjmp(a.parent->on_error, 1);
+            janet_asm_longjmp(a.parent);
         }
         result.funcdef = NULL;
         result.error = a.errmessage;
@@ -705,8 +718,8 @@ static JanetAssembleResult janet_asm1(JanetAssembler *parent, Janet source, int
             if (!janet_checkint(tup[1])) {
                 janet_asm_error(&a, "expected integer");
             }
-            mapping.start = janet_unwrap_integer(tup[0]);
-            mapping.end = janet_unwrap_integer(tup[1]);
+            mapping.line = janet_unwrap_integer(tup[0]);
+            mapping.column = janet_unwrap_integer(tup[1]);
             def->sourcemap[i] = mapping;
         }
     }
@@ -749,31 +762,31 @@ static const JanetInstructionDef *janet_asm_reverse_lookup(uint32_t instr) {
 }
 
 /* Create some constant sized tuples */
-static Janet tup1(Janet x) {
+static const Janet *tup1(Janet x) {
     Janet *tup = janet_tuple_begin(1);
     tup[0] = x;
-    return janet_wrap_tuple(janet_tuple_end(tup));
+    return janet_tuple_end(tup);
 }
-static Janet tup2(Janet x, Janet y) {
+static const Janet *tup2(Janet x, Janet y) {
     Janet *tup = janet_tuple_begin(2);
     tup[0] = x;
     tup[1] = y;
-    return janet_wrap_tuple(janet_tuple_end(tup));
+    return janet_tuple_end(tup);
 }
-static Janet tup3(Janet x, Janet y, Janet z) {
+static const Janet *tup3(Janet x, Janet y, Janet z) {
     Janet *tup = janet_tuple_begin(3);
     tup[0] = x;
     tup[1] = y;
     tup[2] = z;
-    return janet_wrap_tuple(janet_tuple_end(tup));
+    return janet_tuple_end(tup);
 }
-static Janet tup4(Janet w, Janet x, Janet y, Janet z) {
+static const Janet *tup4(Janet w, Janet x, Janet y, Janet z) {
     Janet *tup = janet_tuple_begin(4);
     tup[0] = w;
     tup[1] = x;
     tup[2] = y;
     tup[3] = z;
-    return janet_wrap_tuple(janet_tuple_end(tup));
+    return janet_tuple_end(tup);
 }
 
 /* Given an argument, convert it to the appropriate integer or symbol */
@@ -784,41 +797,56 @@ Janet janet_asm_decode_instruction(uint32_t instr) {
         return janet_wrap_integer((int32_t)instr);
     }
     name = janet_csymbolv(def->name);
+    const Janet *ret = NULL;
 #define oparg(shift, mask) ((instr >> ((shift) << 3)) & (mask))
     switch (janet_instructions[def->opcode]) {
         case JINT_0:
-            return tup1(name);
+            ret = tup1(name);
+            break;
         case JINT_S:
-            return tup2(name, janet_wrap_integer(oparg(1, 0xFFFFFF)));
+            ret = tup2(name, janet_wrap_integer(oparg(1, 0xFFFFFF)));
+            break;
         case JINT_L:
-            return tup2(name, janet_wrap_integer((int32_t)instr >> 8));
+            ret = tup2(name, janet_wrap_integer((int32_t)instr >> 8));
+            break;
         case JINT_SS:
         case JINT_ST:
         case JINT_SC:
         case JINT_SU:
         case JINT_SD:
-            return tup3(name,
-                        janet_wrap_integer(oparg(1, 0xFF)),
-                        janet_wrap_integer(oparg(2, 0xFFFF)));
+            ret = tup3(name,
+                       janet_wrap_integer(oparg(1, 0xFF)),
+                       janet_wrap_integer(oparg(2, 0xFFFF)));
+            break;
         case JINT_SI:
         case JINT_SL:
-            return tup3(name,
+            ret =  tup3(name,
                         janet_wrap_integer(oparg(1, 0xFF)),
                         janet_wrap_integer((int32_t)instr >> 16));
+            break;
         case JINT_SSS:
         case JINT_SES:
         case JINT_SSU:
-            return tup4(name,
-                        janet_wrap_integer(oparg(1, 0xFF)),
-                        janet_wrap_integer(oparg(2, 0xFF)),
-                        janet_wrap_integer(oparg(3, 0xFF)));
+            ret = tup4(name,
+                       janet_wrap_integer(oparg(1, 0xFF)),
+                       janet_wrap_integer(oparg(2, 0xFF)),
+                       janet_wrap_integer(oparg(3, 0xFF)));
+            break;
         case JINT_SSI:
-            return tup4(name,
-                        janet_wrap_integer(oparg(1, 0xFF)),
-                        janet_wrap_integer(oparg(2, 0xFF)),
-                        janet_wrap_integer((int32_t)instr >> 24));
+            ret = tup4(name,
+                       janet_wrap_integer(oparg(1, 0xFF)),
+                       janet_wrap_integer(oparg(2, 0xFF)),
+                       janet_wrap_integer((int32_t)instr >> 24));
+            break;
     }
 #undef oparg
+    if (ret) {
+        /* Check if break point set */
+        if (instr & 0x80) {
+            janet_tuple_flag(ret) |= JANET_TUPLE_FLAG_BRACKETCTOR;
+        }
+        return janet_wrap_tuple(ret);
+    }
     return janet_wrap_nil();
 }
 
@@ -849,7 +877,7 @@ Janet janet_disasm(JanetFuncDef *def) {
             Janet src = def->constants[i];
             Janet dest;
             if (janet_checktype(src, JANET_TUPLE)) {
-                dest = tup2(janet_csymbolv("quote"), src);
+                dest = janet_wrap_tuple(tup2(janet_csymbolv("quote"), src));
             } else {
                 dest = src;
             }
@@ -870,8 +898,8 @@ Janet janet_disasm(JanetFuncDef *def) {
         for (i = 0; i < def->bytecode_length; i++) {
             Janet *t = janet_tuple_begin(2);
             JanetSourceMapping mapping = def->sourcemap[i];
-            t[0] = janet_wrap_integer(mapping.start);
-            t[1] = janet_wrap_integer(mapping.end);
+            t[0] = janet_wrap_integer(mapping.line);
+            t[1] = janet_wrap_integer(mapping.column);
             sourcemap->data[i] = janet_wrap_tuple(janet_tuple_end(t));
         }
         sourcemap->count = def->bytecode_length;

src/core/buffer.c

@@ -59,7 +59,7 @@ void janet_buffer_ensure(JanetBuffer *buffer, int32_t capacity, int32_t growth)
     uint8_t *new_data;
     uint8_t *old = buffer->data;
     if (capacity <= buffer->capacity) return;
-    int64_t big_capacity = capacity * growth;
+    int64_t big_capacity = ((int64_t) capacity) * growth;
     capacity = big_capacity > INT32_MAX ? INT32_MAX : (int32_t) big_capacity;
     janet_vm_next_collection += capacity - buffer->capacity;
     new_data = realloc(old, capacity * sizeof(uint8_t));
@@ -182,6 +182,19 @@ static Janet cfun_buffer_new_filled(int32_t argc, Janet *argv) {
     return janet_wrap_buffer(buffer);
 }
 
+static Janet cfun_buffer_fill(int32_t argc, Janet *argv) {
+    janet_arity(argc, 1, 2);
+    JanetBuffer *buffer = janet_getbuffer(argv, 0);
+    int32_t byte = 0;
+    if (argc == 2) {
+        byte = janet_getinteger(argv, 1) & 0xFF;
+    }
+    if (buffer->count) {
+        memset(buffer->data, byte, buffer->count);
+    }
+    return argv[0];
+}
+
 static Janet cfun_buffer_u8(int32_t argc, Janet *argv) {
     int32_t i;
     janet_arity(argc, 1, -1);
@@ -242,8 +255,8 @@ static Janet cfun_buffer_popn(int32_t argc, Janet *argv) {
 }
 
 static Janet cfun_buffer_slice(int32_t argc, Janet *argv) {
-    JanetRange range = janet_getslice(argc, argv);
     JanetByteView view = janet_getbytes(argv, 0);
+    JanetRange range = janet_getslice(argc, argv);
     JanetBuffer *buffer = janet_buffer(range.end - range.start);
     if (buffer->data)
         memcpy(buffer->data, view.bytes + range.start, range.end - range.start);
@@ -345,8 +358,8 @@ static const JanetReg buffer_cfuns[] = {
     {
         "buffer/new", cfun_buffer_new,
         JDOC("(buffer/new capacity)\n\n"
-             "Creates a new, empty buffer with enough memory for capacity bytes. "
-             "Returns a new buffer.")
+             "Creates a new, empty buffer with enough backing memory for capacity bytes. "
+             "Returns a new buffer of length 0.")
     },
     {
         "buffer/new-filled", cfun_buffer_new_filled,
@@ -354,6 +367,12 @@ static const JanetReg buffer_cfuns[] = {
              "Creates a new buffer of length count filled with byte. By default, byte is 0. "
              "Returns the new buffer.")
     },
+    {
+        "buffer/fill", cfun_buffer_fill,
+        JDOC("(buffer/fill buffer &opt byte)\n\n"
+             "Fill up a buffer with bytes, defaulting to 0s. Does not change the buffer's length. "
+             "Returns the modified buffer.")
+    },
     {
         "buffer/push-byte", cfun_buffer_u8,
         JDOC("(buffer/push-byte buffer x)\n\n"

src/core/bytecode.c

@@ -80,6 +80,7 @@ enum JanetInstructionType janet_instructions[JOP_INSTRUCTION_COUNT] = {
     JINT_SSS, /* JOP_RESUME, */
     JINT_SSU, /* JOP_SIGNAL, */
     JINT_SSS, /* JOP_PROPAGATE */
+    JINT_SSS, /* JOP_IN, */
     JINT_SSS, /* JOP_GET, */
     JINT_SSS, /* JOP_PUT, */
     JINT_SSU, /* JOP_GET_INDEX, */
@@ -203,7 +204,7 @@ int32_t janet_verify(JanetFuncDef *def) {
 
 /* Allocate an empty funcdef. This function may have added functionality
  * as commonalities between asm and compile arise. */
-JanetFuncDef *janet_funcdef_alloc() {
+JanetFuncDef *janet_funcdef_alloc(void) {
     JanetFuncDef *def = janet_gcalloc(JANET_MEMORY_FUNCDEF, sizeof(JanetFuncDef));
     def->environments = NULL;
     def->constants = NULL;

src/core/capi.c

@@ -29,7 +29,11 @@
 void janet_panicv(Janet message) {
     if (janet_vm_return_reg != NULL) {
         *janet_vm_return_reg = message;
+#if defined(JANET_BSD) || defined(JANET_APPLE)
+        _longjmp(*janet_vm_jmp_buf, 1);
+#else
         longjmp(*janet_vm_jmp_buf, 1);
+#endif
     } else {
         fputs((const char *)janet_formatc("janet top level panic - %v\n", message), stdout);
         exit(1);
@@ -51,19 +55,6 @@ void janet_panicf(const char *format, ...) {
     janet_panics(ret);
 }
 
-void janet_printf(const char *format, ...) {
-    va_list args;
-    JanetBuffer buffer;
-    int32_t len = 0;
-    while (format[len]) len++;
-    janet_buffer_init(&buffer, len);
-    va_start(args, format);
-    janet_formatb(&buffer, format, args);
-    va_end(args);
-    fwrite(buffer.data, buffer.count, 1, janet_dynfile("out", stdout));
-    janet_buffer_deinit(&buffer);
-}
-
 void janet_panic(const char *message) {
     janet_panicv(janet_cstringv(message));
 }
@@ -101,13 +92,30 @@ type janet_get##name(const Janet *argv, int32_t n) { \
     return janet_unwrap_##name(x); \
 }
 
-Janet janet_getmethod(const uint8_t *method, const JanetMethod *methods) {
+#define DEFINE_OPT(name, NAME, type) \
+type janet_opt##name(const Janet *argv, int32_t argc, int32_t n, type dflt) { \
+    if (n >= argc) return dflt; \
+    if (janet_checktype(argv[n], JANET_NIL)) return dflt; \
+    return janet_get##name(argv, n); \
+}
+
+#define DEFINE_OPTLEN(name, NAME, type) \
+type janet_opt##name(const Janet *argv, int32_t argc, int32_t n, int32_t dflt_len) { \
+    if (n >= argc || janet_checktype(argv[n], JANET_NIL)) {\
+        return janet_##name(dflt_len); \
+    }\
+    return janet_get##name(argv, n); \
+}
+
+int janet_getmethod(const uint8_t *method, const JanetMethod *methods, Janet *out) {
     while (methods->name) {
-        if (!janet_cstrcmp(method, methods->name))
-            return janet_wrap_cfunction(methods->cfun);
+        if (!janet_cstrcmp(method, methods->name)) {
+            *out = janet_wrap_cfunction(methods->cfun);
+            return 1;
+        }
         methods++;
     }
-    return janet_wrap_nil();
+    return 0;
 }
 
 DEFINE_GETTER(number, NUMBER, double)
@@ -125,6 +133,26 @@ DEFINE_GETTER(cfunction, CFUNCTION, JanetCFunction)
 DEFINE_GETTER(boolean, BOOLEAN, int)
 DEFINE_GETTER(pointer, POINTER, void *)
 
+DEFINE_OPT(number, NUMBER, double)
+DEFINE_OPT(tuple, TUPLE, const Janet *)
+DEFINE_OPT(struct, STRUCT, const JanetKV *)
+DEFINE_OPT(string, STRING, const uint8_t *)
+DEFINE_OPT(keyword, KEYWORD, const uint8_t *)
+DEFINE_OPT(symbol, SYMBOL, const uint8_t *)
+DEFINE_OPT(fiber, FIBER, JanetFiber *)
+DEFINE_OPT(function, FUNCTION, JanetFunction *)
+DEFINE_OPT(cfunction, CFUNCTION, JanetCFunction)
+DEFINE_OPT(boolean, BOOLEAN, int)
+DEFINE_OPT(pointer, POINTER, void *)
+
+DEFINE_OPTLEN(buffer, BUFFER, JanetBuffer *)
+DEFINE_OPTLEN(table, TABLE, JanetTable *)
+DEFINE_OPTLEN(array, ARRAY, JanetArray *)
+
+#undef DEFINE_GETTER
+#undef DEFINE_OPT
+#undef DEFINE_OPTLEN
+
 const char *janet_getcstring(const Janet *argv, int32_t n) {
     const uint8_t *jstr = janet_getstring(argv, n);
     const char *cstr = (const char *)jstr;
@@ -134,10 +162,44 @@ const char *janet_getcstring(const Janet *argv, int32_t n) {
     return cstr;
 }
 
+int32_t janet_getnat(const Janet *argv, int32_t n) {
+    Janet x = argv[n];
+    if (!janet_checkint(x)) goto bad;
+    int32_t ret = janet_unwrap_integer(x);
+    if (ret < 0) goto bad;
+    return ret;
+bad:
+    janet_panicf("bad slot #%d, expected non-negative 32 bit signed integer, got %v", n, x);
+}
+
+JanetAbstract janet_checkabstract(Janet x, const JanetAbstractType *at) {
+    if (!janet_checktype(x, JANET_ABSTRACT)) return NULL;
+    JanetAbstract a = janet_unwrap_abstract(x);
+    if (janet_abstract_type(a) != at) return NULL;
+    return a;
+}
+
+static int janet_strlike_cmp(JanetType type, Janet x, const char *cstring) {
+    if (janet_type(x) != type) return 0;
+    return !janet_cstrcmp(janet_unwrap_string(x), cstring);
+}
+
+int janet_keyeq(Janet x, const char *cstring) {
+    return janet_strlike_cmp(JANET_KEYWORD, x, cstring);
+}
+
+int janet_streq(Janet x, const char *cstring) {
+    return janet_strlike_cmp(JANET_STRING, x, cstring);
+}
+
+int janet_symeq(Janet x, const char *cstring) {
+    return janet_strlike_cmp(JANET_SYMBOL, x, cstring);
+}
+
 int32_t janet_getinteger(const Janet *argv, int32_t n) {
     Janet x = argv[n];
     if (!janet_checkint(x)) {
-        janet_panicf("bad slot #%d, expected integer, got %v", n, x);
+        janet_panicf("bad slot #%d, expected 32 bit signed integer, got %v", n, x);
     }
     return janet_unwrap_integer(x);
 }
@@ -145,7 +207,7 @@ int32_t janet_getinteger(const Janet *argv, int32_t n) {
 int64_t janet_getinteger64(const Janet *argv, int32_t n) {
     Janet x = argv[n];
     if (!janet_checkint64(x)) {
-        janet_panicf("bad slot #%d, expected 64 bit integer, got %v", n, x);
+        janet_panicf("bad slot #%d, expected 64 bit signed integer, got %v", n, x);
     }
     return (int64_t) janet_unwrap_number(x);
 }
@@ -221,11 +283,17 @@ JanetRange janet_getslice(int32_t argc, const Janet *argv) {
         range.start = 0;
         range.end = length;
     } else if (argc == 2) {
-        range.start = janet_gethalfrange(argv, 1, length, "start");
+        range.start = janet_checktype(argv[1], JANET_NIL)
+                      ? 0
+                      : janet_gethalfrange(argv, 1, length, "start");
         range.end = length;
     } else {
-        range.start = janet_gethalfrange(argv, 1, length, "start");
-        range.end = janet_gethalfrange(argv, 2, length, "end");
+        range.start = janet_checktype(argv[1], JANET_NIL)
+                      ? 0
+                      : janet_gethalfrange(argv, 1, length, "start");
+        range.end = janet_checktype(argv[2], JANET_NIL)
+                    ? length
+                    : janet_gethalfrange(argv, 2, length, "end");
         if (range.end < range.start)
             range.end = range.start;
     }
@@ -271,6 +339,36 @@ uint64_t janet_getflags(const Janet *argv, int32_t n, const char *flags) {
     return ret;
 }
 
+int32_t janet_optnat(const Janet *argv, int32_t argc, int32_t n, int32_t dflt) {
+    if (argc <= n) return dflt;
+    if (janet_checktype(argv[n], JANET_NIL)) return dflt;
+    return janet_getnat(argv, n);
+}
+
+int32_t janet_optinteger(const Janet *argv, int32_t argc, int32_t n, int32_t dflt) {
+    if (argc <= n) return dflt;
+    if (janet_checktype(argv[n], JANET_NIL)) return dflt;
+    return janet_getinteger(argv, n);
+}
+
+int64_t janet_optinteger64(const Janet *argv, int32_t argc, int32_t n, int64_t dflt) {
+    if (argc <= n) return dflt;
+    if (janet_checktype(argv[n], JANET_NIL)) return dflt;
+    return janet_getinteger64(argv, n);
+}
+
+size_t janet_optsize(const Janet *argv, int32_t argc, int32_t n, size_t dflt) {
+    if (argc <= n) return dflt;
+    if (janet_checktype(argv[n], JANET_NIL)) return dflt;
+    return janet_getsize(argv, n);
+}
+
+void *janet_optabstract(const Janet *argv, int32_t argc, int32_t n, const JanetAbstractType *at, void *dflt) {
+    if (argc <= n) return dflt;
+    if (janet_checktype(argv[n], JANET_NIL)) return dflt;
+    return janet_getabstract(argv, n, at);
+}
+
 /* Some definitions for function-like macros */
 
 JANET_API JanetStructHead *(janet_struct_head)(const JanetKV *st) {

src/core/cfuns.c

@@ -27,10 +27,6 @@
 #include "vector.h"
 #endif
 
-static int fixarity0(JanetFopts opts, JanetSlot *args) {
-    (void) opts;
-    return janet_v_count(args) == 0;
-}
 static int fixarity1(JanetFopts opts, JanetSlot *args) {
     (void) opts;
     return janet_v_count(args) == 1;
@@ -101,8 +97,16 @@ static JanetSlot do_error(JanetFopts opts, JanetSlot *args) {
 }
 static JanetSlot do_debug(JanetFopts opts, JanetSlot *args) {
     (void)args;
-    janetc_emit(opts.compiler, JOP_SIGNAL | (2 << 24));
-    return janetc_cslot(janet_wrap_nil());
+    int32_t len = janet_v_count(args);
+    JanetSlot t = janetc_gettarget(opts);
+    janetc_emit_ssu(opts.compiler, JOP_SIGNAL, t,
+                    (len == 1) ? args[0] : janetc_cslot(janet_wrap_nil()),
+                    JANET_SIGNAL_DEBUG,
+                    1);
+    return t;
+}
+static JanetSlot do_in(JanetFopts opts, JanetSlot *args) {
+    return opreduce(opts, args, JOP_IN, janet_wrap_nil());
 }
 static JanetSlot do_get(JanetFopts opts, JanetSlot *args) {
     return opreduce(opts, args, JOP_GET, janet_wrap_nil());
@@ -270,12 +274,12 @@ static JanetSlot do_neq(JanetFopts opts, JanetSlot *args) {
 
 /* Arranged by tag */
 static const JanetFunOptimizer optimizers[] = {
-    {fixarity0, do_debug},
+    {maxarity1, do_debug},
     {fixarity1, do_error},
     {minarity2, do_apply},
     {maxarity1, do_yield},
     {fixarity2, do_resume},
-    {fixarity2, do_get},
+    {fixarity2, do_in},
     {fixarity3, do_put},
     {fixarity1, do_length},
     {NULL, do_add},
@@ -301,7 +305,8 @@ static const JanetFunOptimizer optimizers[] = {
     {NULL, do_lte},
     {NULL, do_eq},
     {NULL, do_neq},
-    {fixarity2, do_propagate}
+    {fixarity2, do_propagate},
+    {fixarity2, do_get}
 };
 
 const JanetFunOptimizer *janetc_funopt(uint32_t flags) {

src/core/compile.c

@@ -320,33 +320,46 @@ JanetSlot *janetc_toslotskv(JanetCompiler *c, Janet ds) {
     return ret;
 }
 
-/* Push slots load via janetc_toslots. */
-void janetc_pushslots(JanetCompiler *c, JanetSlot *slots) {
+/* Push slots loaded via janetc_toslots. Return the minimum number of slots pushed,
+ * or -1 - min_arity if there is a splice. (if there is no splice, min_arity is also
+ * the maximum possible arity). */
+int32_t janetc_pushslots(JanetCompiler *c, JanetSlot *slots) {
     int32_t i;
     int32_t count = janet_v_count(slots);
+    int32_t min_arity = 0;
+    int has_splice = 0;
     for (i = 0; i < count;) {
         if (slots[i].flags & JANET_SLOT_SPLICED) {
             janetc_emit_s(c, JOP_PUSH_ARRAY, slots[i], 0);
             i++;
+            has_splice = 1;
         } else if (i + 1 == count) {
             janetc_emit_s(c, JOP_PUSH, slots[i], 0);
             i++;
+            min_arity++;
         } else if (slots[i + 1].flags & JANET_SLOT_SPLICED) {
             janetc_emit_s(c, JOP_PUSH, slots[i], 0);
             janetc_emit_s(c, JOP_PUSH_ARRAY, slots[i + 1], 0);
             i += 2;
+            min_arity++;
+            has_splice = 1;
         } else if (i + 2 == count) {
             janetc_emit_ss(c, JOP_PUSH_2, slots[i], slots[i + 1], 0);
             i += 2;
+            min_arity += 2;
         } else if (slots[i + 2].flags & JANET_SLOT_SPLICED) {
             janetc_emit_ss(c, JOP_PUSH_2, slots[i], slots[i + 1], 0);
             janetc_emit_s(c, JOP_PUSH_ARRAY, slots[i + 2], 0);
             i += 3;
+            min_arity += 2;
+            has_splice = 1;
         } else {
             janetc_emit_sss(c, JOP_PUSH_3, slots[i], slots[i + 1], slots[i + 2], 0);
             i += 3;
+            min_arity += 3;
         }
     }
+    return has_splice ? (-1 - min_arity) : min_arity;
 }
 
 /* Check if a list of slots has any spliced slots */
@@ -403,7 +416,67 @@ static JanetSlot janetc_call(JanetFopts opts, JanetSlot *slots, JanetSlot fun) {
         /* TODO janet function inlining (no c functions)*/
     }
     if (!specialized) {
-        janetc_pushslots(c, slots);
+        int32_t min_arity = janetc_pushslots(c, slots);
+        /* Check for provably incorrect function calls */
+        if (fun.flags & JANET_SLOT_CONSTANT) {
+
+            /* Check for bad arity type if fun is a constant */
+            switch (janet_type(fun.constant)) {
+                case JANET_FUNCTION: {
+                    JanetFunction *f = janet_unwrap_function(fun.constant);
+                    int32_t min = f->def->min_arity;
+                    int32_t max = f->def->max_arity;
+                    if (min_arity < 0) {
+                        /* Call has splices */
+                        min_arity = -1 - min_arity;
+                        if (min_arity > max && max >= 0) {
+                            const uint8_t *es = janet_formatc(
+                                                    "%v expects at most %d argument, got at least %d",
+                                                    fun.constant, max, min_arity);
+                            janetc_error(c, es);
+                        }
+                    } else {
+                        /* Call has no splices */
+                        if (min_arity > max && max >= 0) {
+                            const uint8_t *es = janet_formatc(
+                                                    "%v expects at most %d argument, got %d",
+                                                    fun.constant, max, min_arity);
+                            janetc_error(c, es);
+                        }
+                        if (min_arity < min) {
+                            const uint8_t *es = janet_formatc(
+                                                    "%v expects at least %d argument, got %d",
+                                                    fun.constant, min, min_arity);
+                            janetc_error(c, es);
+                        }
+                    }
+                }
+                break;
+                case JANET_CFUNCTION:
+                case JANET_ABSTRACT:
+                    break;
+                case JANET_KEYWORD:
+                    if (min_arity == 0) {
+                        const uint8_t *es = janet_formatc("%v expects at least 1 argument, got 0",
+                                                          fun.constant);
+                        janetc_error(c, es);
+                    }
+                    break;
+                default:
+                    if (min_arity > 1 || min_arity == 0) {
+                        const uint8_t *es = janet_formatc("%v expects 1 argument, got %d",
+                                                          fun.constant, min_arity);
+                        janetc_error(c, es);
+                    }
+                    if (min_arity < -2) {
+                        const uint8_t *es = janet_formatc("%v expects 1 argument, got at least %d",
+                                                          fun.constant, -1 - min_arity);
+                        janetc_error(c, es);
+                    }
+                    break;
+            }
+        }
+
         if ((opts.flags & JANET_FOPTS_TAIL) &&
                 /* Prevent top level tail calls for better errors */
                 !(c->scope->flags & JANET_SCOPE_TOP)) {
@@ -474,9 +547,9 @@ static int macroexpand1(
     if (janet_tuple_length(form) == 0)
         return 0;
     /* Source map - only set when we get a tuple */
-    if (janet_tuple_sm_start(form) >= 0) {
-        c->current_mapping.start = janet_tuple_sm_start(form);
-        c->current_mapping.end = janet_tuple_sm_end(form);
+    if (janet_tuple_sm_line(form) >= 0) {
+        c->current_mapping.line = janet_tuple_sm_line(form);
+        c->current_mapping.column = janet_tuple_sm_column(form);
     }
     /* Bracketed tuples are not specials or macros! */
     if (janet_tuple_flag(form) & JANET_TUPLE_FLAG_BRACKETCTOR)
@@ -496,15 +569,24 @@ static int macroexpand1(
         return 0;
 
     /* Evaluate macro */
-    JanetFiber *fiberp = NULL;
     JanetFunction *macro = janet_unwrap_function(macroval);
+    int32_t arity = janet_tuple_length(form) - 1;
+    JanetFiber *fiberp = janet_fiber(macro, 64, arity, form + 1);
+    if (NULL == fiberp) {
+        int32_t minar = macro->def->min_arity;
+        int32_t maxar = macro->def->max_arity;
+        const uint8_t *es = NULL;
+        if (minar >= 0 && arity < minar)
+            es = janet_formatc("macro arity mismatch, expected at least %d, got %d", minar, arity);
+        if (maxar >= 0 && arity > maxar)
+            es = janet_formatc("macro arity mismatch, expected at most %d, got %d", maxar, arity);
+        c->result.macrofiber = NULL;
+        janetc_error(c, es);
+    }
+    /* Set env */
+    fiberp->env = c->env;
     int lock = janet_gclock();
-    JanetSignal status = janet_pcall(
-                             macro,
-                             janet_tuple_length(form) - 1,
-                             form + 1,
-                             &x,
-                             &fiberp);
+    JanetSignal status = janet_continue(fiberp, janet_wrap_nil(), &x);
     janet_gcunlock(lock);
     if (status != JANET_SIGNAL_OK) {
         const uint8_t *es = janet_formatc("(macro) %V", x);
@@ -555,7 +637,7 @@ JanetSlot janetc_value(JanetFopts opts, Janet x) {
                 const Janet *tup = janet_unwrap_tuple(x);
                 /* Empty tuple is tuple literal */
                 if (janet_tuple_length(tup) == 0) {
-                    ret = janetc_cslot(x);
+                    ret = janetc_cslot(janet_wrap_tuple(janet_tuple_n(NULL, 0)));
                 } else if (janet_tuple_flag(tup) & JANET_TUPLE_FLAG_BRACKETCTOR) { /* [] tuples are not function call */
                     ret = janetc_tuple(opts, x);
                 } else {
@@ -664,15 +746,15 @@ static void janetc_init(JanetCompiler *c, JanetTable *env, const uint8_t *where)
     c->recursion_guard = JANET_RECURSION_GUARD;
     c->env = env;
     c->source = where;
-    c->current_mapping.start = -1;
-    c->current_mapping.end = -1;
+    c->current_mapping.line = -1;
+    c->current_mapping.column = -1;
     /* Init result */
     c->result.error = NULL;
     c->result.status = JANET_COMPILE_OK;
     c->result.funcdef = NULL;
     c->result.macrofiber = NULL;
-    c->result.error_mapping.start = -1;
-    c->result.error_mapping.end = -1;
+    c->result.error_mapping.line = -1;
+    c->result.error_mapping.column = -1;
 }
 
 /* Deinitialize a compiler struct */
@@ -733,8 +815,8 @@ static Janet cfun(int32_t argc, Janet *argv) {
     } else {
         JanetTable *t = janet_table(4);
         janet_table_put(t, janet_ckeywordv("error"), janet_wrap_string(res.error));
-        janet_table_put(t, janet_ckeywordv("start"), janet_wrap_integer(res.error_mapping.start));
-        janet_table_put(t, janet_ckeywordv("end"), janet_wrap_integer(res.error_mapping.end));
+        janet_table_put(t, janet_ckeywordv("line"), janet_wrap_integer(res.error_mapping.line));
+        janet_table_put(t, janet_ckeywordv("column"), janet_wrap_integer(res.error_mapping.column));
         if (res.macrofiber) {
             janet_table_put(t, janet_ckeywordv("fiber"), janet_wrap_fiber(res.macrofiber));
         }

src/core/compile.h

@@ -34,7 +34,7 @@
 #define JANET_FUN_APPLY 3
 #define JANET_FUN_YIELD 4
 #define JANET_FUN_RESUME 5
-#define JANET_FUN_GET 6
+#define JANET_FUN_IN 6
 #define JANET_FUN_PUT 7
 #define JANET_FUN_LENGTH 8
 #define JANET_FUN_ADD 9
@@ -61,6 +61,7 @@
 #define JANET_FUN_EQ 30
 #define JANET_FUN_NEQ 31
 #define JANET_FUN_PROP 32
+#define JANET_FUN_GET 33
 
 /* Compiler typedefs */
 typedef struct JanetCompiler JanetCompiler;
@@ -214,7 +215,7 @@ JanetSlot *janetc_toslots(JanetCompiler *c, const Janet *vals, int32_t len);
 JanetSlot *janetc_toslotskv(JanetCompiler *c, Janet ds);
 
 /* Push slots load via janetc_toslots. */
-void janetc_pushslots(JanetCompiler *c, JanetSlot *slots);
+int32_t janetc_pushslots(JanetCompiler *c, JanetSlot *slots);
 
 /* Free slots loaded via janetc_toslots */
 void janetc_freeslots(JanetCompiler *c, JanetSlot *slots);

src/core/corelib.c

@@ -177,6 +177,13 @@ static Janet janet_core_expand_path(int32_t argc, Janet *argv) {
             } else if (strncmp(template + i, ":name:", 6) == 0) {
                 janet_buffer_push_cstring(out, name);
                 i += 5;
+            } else if (strncmp(template + i, ":native:", 8) == 0) {
+#ifdef JANET_WINDOWS
+                janet_buffer_push_cstring(out, ".dll");
+#else
+                janet_buffer_push_cstring(out, ".so");
+#endif
+                i += 7;
             } else {
                 janet_buffer_push_u8(out, (uint8_t) template[i]);
             }
@@ -342,6 +349,21 @@ static Janet janet_core_array(int32_t argc, Janet *argv) {
     return janet_wrap_array(array);
 }
 
+static Janet janet_core_slice(int32_t argc, Janet *argv) {
+    JanetRange range;
+    JanetByteView bview;
+    JanetView iview;
+    if (janet_bytes_view(argv[0], &bview.bytes, &bview.len)) {
+        range = janet_getslice(argc, argv);
+        return janet_stringv(bview.bytes + range.start, range.end - range.start);
+    } else if (janet_indexed_view(argv[0], &iview.items, &iview.len)) {
+        range = janet_getslice(argc, argv);
+        return janet_wrap_tuple(janet_tuple_n(iview.items + range.start, range.end - range.start));
+    } else {
+        janet_panic_type(argv[0], 0, JANET_TFLAG_BYTES | JANET_TFLAG_INDEXED);
+    }
+}
+
 static Janet janet_core_table(int32_t argc, Janet *argv) {
     int32_t i;
     if (argc & 1)
@@ -576,7 +598,7 @@ static const JanetReg corelib_cfuns[] = {
         "gcsetinterval", janet_core_gcsetinterval,
         JDOC("(gcsetinterval interval)\n\n"
              "Set an integer number of bytes to allocate before running garbage collection. "
-             "Low valuesi for interval will be slower but use less memory. "
+             "Low values for interval will be slower but use less memory. "
              "High values will be faster but use more memory.")
     },
     {
@@ -653,7 +675,13 @@ static const JanetReg corelib_cfuns[] = {
              "Expands a path template as found in module/paths for module/find. "
              "This takes in a path (the argument to require) and a template string, template, "
              "to expand the path to a path that can be "
-             "used for importing files.")
+             "used for importing files. The replacements are as follows:\n\n"
+             "\t:all:\tthe value of path verbatim\n"
+             "\t:cur:\tthe current file, or (dyn :current-file)\n"
+             "\t:dir:\tthe directory containing the current file\n"
+             "\t:name:\tthe filename component of path, with extenion if given\n"
+             "\t:native:\tthe extension used to load natives, .so or .dll\n"
+             "\t:sys:\tthe system path, or (syn :syspath)")
     },
     {
         "int?", janet_core_check_int,
@@ -665,6 +693,11 @@ static const JanetReg corelib_cfuns[] = {
         JDOC("(nat? x)\n\n"
              "Check if x can be exactly represented as a non-negative 32 bit signed two's complement integer.")
     },
+    {
+        "slice", janet_core_slice,
+        JDOC("(slice x &opt start end)\n\n"
+             "Extract a sub-range of an indexed data strutrue or byte sequence.")
+    },
     {NULL, NULL, NULL}
 };
 
@@ -746,7 +779,7 @@ static void templatize_varop(
         SSI(JOP_GET_INDEX, 3, 0, 0), /* accum = args[0] */
         SI(JOP_LOAD_INTEGER, 5, 1), /* i = 1 */
         /* Main loop */
-        SSS(JOP_GET, 4, 0, 5), /* operand = args[i] */
+        SSS(JOP_IN, 4, 0, 5), /* operand = args[i] */
         SSS(op, 3, 3, 4), /* accum = accum op operand */
         SSI(JOP_ADD_IMMEDIATE, 5, 5, 1), /* i++ */
         SSI(JOP_EQUALS, 2, 5, 1), /* jump? = (i == argn) */
@@ -794,7 +827,7 @@ static void templatize_comparator(
         SI(JOP_LOAD_INTEGER, 5, 1), /* i = 1 */
 
         /* Main loop */
-        SSS(JOP_GET, 4, 0, 5), /* next = args[i] */
+        SSS(JOP_IN, 4, 0, 5), /* next = args[i] */
         SSS(op, 2, 3, 4), /* jump? = last compare next */
         SI(JOP_JUMP_IF_NOT, 2, 7), /* if not jump? goto fail (return false) */
         SSI(JOP_ADD_IMMEDIATE, 5, 5, 1), /* i++ */
@@ -841,7 +874,7 @@ static void make_apply(JanetTable *env) {
         SI(JOP_LOAD_INTEGER, 4, 0), /* i = 0 */
 
         /* Main loop */
-        SSS(JOP_GET, 5, 1, 4), /* x = args[i] */
+        SSS(JOP_IN, 5, 1, 4), /* x = args[i] */
         SSI(JOP_ADD_IMMEDIATE, 4, 4, 1), /* i++ */
         SSI(JOP_EQUALS, 3, 4, 2), /* jump? = (i == argn) */
         SI(JOP_JUMP_IF, 3, 3), /* if jump? go forward 3 */
@@ -870,7 +903,7 @@ static const uint32_t error_asm[] = {
 };
 static const uint32_t debug_asm[] = {
     JOP_SIGNAL | (2 << 24),
-    JOP_RETURN_NIL
+    JOP_RETURN
 };
 static const uint32_t yield_asm[] = {
     JOP_SIGNAL | (3 << 24),
@@ -880,6 +913,14 @@ static const uint32_t resume_asm[] = {
     JOP_RESUME | (1 << 24),
     JOP_RETURN
 };
+static const uint32_t in_asm[] = {
+    JOP_IN | (1 << 24),
+    JOP_LOAD_NIL | (3 << 8),
+    JOP_EQUALS | (3 << 8) | (3 << 24),
+    JOP_JUMP_IF | (3 << 8) | (2 << 16),
+    JOP_RETURN,
+    JOP_RETURN | (2 << 8)
+};
 static const uint32_t get_asm[] = {
     JOP_GET | (1 << 24),
     JOP_LOAD_NIL | (3 << 8),
@@ -904,13 +945,48 @@ static const uint32_t propagate_asm[] = {
     JOP_PROPAGATE | (1 << 24),
     JOP_RETURN
 };
-#endif /* ifndef JANET_NO_BOOTSTRAP */
+#endif /* ifdef JANET_BOOTSTRAP */
+
+/*
+ * Setup Environment
+ */
+
+static void janet_load_libs(JanetTable *env) {
+    janet_core_cfuns(env, NULL, corelib_cfuns);
+    janet_lib_io(env);
+    janet_lib_math(env);
+    janet_lib_array(env);
+    janet_lib_tuple(env);
+    janet_lib_buffer(env);
+    janet_lib_table(env);
+    janet_lib_fiber(env);
+    janet_lib_os(env);
+    janet_lib_parse(env);
+    janet_lib_compile(env);
+    janet_lib_debug(env);
+    janet_lib_string(env);
+    janet_lib_marsh(env);
+#ifdef JANET_PEG
+    janet_lib_peg(env);
+#endif
+#ifdef JANET_ASSEMBLER
+    janet_lib_asm(env);
+#endif
+#ifdef JANET_TYPED_ARRAY
+    janet_lib_typed_array(env);
+#endif
+#ifdef JANET_INT_TYPES
+    janet_lib_inttypes(env);
+#endif
+#ifdef JANET_THREADS
+    janet_lib_thread(env);
+#endif
+}
+
+#ifdef JANET_BOOTSTRAP
 
 JanetTable *janet_core_env(JanetTable *replacements) {
     JanetTable *env = (NULL != replacements) ? replacements : janet_table(0);
-    janet_core_cfuns(env, NULL, corelib_cfuns);
-
-#ifdef JANET_BOOTSTRAP
     janet_quick_asm(env, JANET_FUN_PROP,
                     "propagate", 2, 2, 2, 2, propagate_asm, sizeof(propagate_asm),
                     JDOC("(propagate x fiber)\n\n"
@@ -919,17 +995,17 @@ JanetTable *janet_core_env(JanetTable *replacements) {
                          "fiber is in a state that can be resumed, resuming the current fiber will "
                          "first resume fiber."));
     janet_quick_asm(env, JANET_FUN_DEBUG,
-                    "debug", 0, 0, 0, 1, debug_asm, sizeof(debug_asm),
-                    JDOC("(debug)\n\n"
+                    "debug", 1, 0, 1, 1, debug_asm, sizeof(debug_asm),
+                    JDOC("(debug &opt x)\n\n"
                          "Throws a debug signal that can be caught by a parent fiber and used to inspect "
-                         "the running state of the current fiber. Returns nil."));
+                         "the running state of the current fiber. Returns the value passed in by resume."));
     janet_quick_asm(env, JANET_FUN_ERROR,
                     "error", 1, 1, 1, 1, error_asm, sizeof(error_asm),
                     JDOC("(error e)\n\n"
                          "Throws an error e that can be caught and handled by a parent fiber."));
     janet_quick_asm(env, JANET_FUN_YIELD,
                     "yield", 1, 0, 1, 2, yield_asm, sizeof(yield_asm),
-                    JDOC("(yield x)\n\n"
+                    JDOC("(yield &opt x)\n\n"
                          "Yield a value to a parent fiber. When a fiber yields, its execution is paused until "
                          "another thread resumes it. The fiber will then resume, and the last yield call will "
                          "return the value that was passed to resume."));
@@ -940,15 +1016,20 @@ JanetTable *janet_core_env(JanetTable *replacements) {
                          "will be returned to the last yield in the case of a pending fiber, or the argument to "
                          "the dispatch function in the case of a new fiber. Returns either the return result of "
                          "the fiber's dispatch function, or the value from the next yield call in fiber."));
+    janet_quick_asm(env, JANET_FUN_IN,
+                    "in", 3, 2, 3, 4, in_asm, sizeof(in_asm),
+                    JDOC("(in ds key &opt dflt)\n\n"
+                         "Get value in ds at key, works on associative data structures. Arrays, tuples, tables, structs, "
+                         "strings, symbols, and buffers are all associative and can be used. Arrays, tuples, strings, buffers, "
+                         "and symbols must use integer keys that are in bounds or an error is raised. Structs and tables can "
+                         "take any value as a key except nil and will return nil or dflt if not found."));
     janet_quick_asm(env, JANET_FUN_GET,
-                    "get", 3, 2, 3, 4, get_asm, sizeof(get_asm),
+                    "get", 3, 2, 3, 4, get_asm, sizeof(in_asm),
                     JDOC("(get ds key &opt dflt)\n\n"
-                         "Get a value from any associative data structure. Arrays, tuples, tables, structs, strings, "
-                         "symbols, and buffers are all associative and can be used with get. Order structures, name "
-                         "arrays, tuples, strings, buffers, and symbols must use integer keys. Structs and tables can "
-                         "take any value as a key except nil and return a value except nil. Byte sequences will return "
-                         "integer representations of bytes as result of a get call. If no values is found, will return "
-                         "dflt or nil if no default is provided."));
+                         "Get the value mapped to key in data structure ds, and return dflt or nil if not found. "
+                         "Similar to in, but will not throw an error if the key is invalid for the data structure "
+                         "unless the data structure is an abstract type. In that case, the abstract type getter may throw "
+                         "an error."));
     janet_quick_asm(env, JANET_FUN_PUT,
                     "put", 3, 3, 3, 3, put_asm, sizeof(put_asm),
                     JDOC("(put ds key value)\n\n"
@@ -1062,48 +1143,50 @@ JanetTable *janet_core_env(JanetTable *replacements) {
     /* Allow references to the environment */
     janet_def(env, "_env", janet_wrap_table(env), JDOC("The environment table for the current scope."));
 
-    /* Set as gc root */
+    janet_load_libs(env);
     janet_gcroot(janet_wrap_table(env));
-#endif
+    return env;
+}
 
-    /* Load auxiliary envs */
-    janet_lib_io(env);
-    janet_lib_math(env);
-    janet_lib_array(env);
-    janet_lib_tuple(env);
-    janet_lib_buffer(env);
-    janet_lib_table(env);
-    janet_lib_fiber(env);
-    janet_lib_os(env);
-    janet_lib_parse(env);
-    janet_lib_compile(env);
-    janet_lib_debug(env);
-    janet_lib_string(env);
-    janet_lib_marsh(env);
-#ifdef JANET_PEG
-    janet_lib_peg(env);
-#endif
-#ifdef JANET_ASSEMBLER
-    janet_lib_asm(env);
-#endif
-#ifdef JANET_TYPED_ARRAY
-    janet_lib_typed_array(env);
-#endif
-#ifdef JANET_INT_TYPES
-    janet_lib_inttypes(env);
-#endif
+#else
 
-#ifndef JANET_BOOTSTRAP
-    /* Unmarshal from core image */
+JanetTable *janet_core_env(JanetTable *replacements) {
+    /* Memoize core env, ignoring replacements the second time around. */
+    if (NULL != janet_vm_core_env) {
+        return janet_vm_core_env;
+    }
+
+    /* Load core cfunctions (and some built in janet assembly functions) */
+    JanetTable *dict = janet_table(300);
+    janet_load_libs(dict);
+
+    /* Add replacements */
+    if (replacements != NULL) {
+        for (int32_t i = 0; i < replacements->capacity; i++) {
+            JanetKV kv = replacements->data[i];
+            if (!janet_checktype(kv.key, JANET_NIL)) {
+                janet_table_put(dict, kv.key, kv.value);
+                if (janet_checktype(kv.value, JANET_CFUNCTION)) {
+                    janet_table_put(janet_vm_registry, kv.value, kv.key);
+                }
+            }
+        }
+    }
+
+    /* Unmarshal bytecode */
     Janet marsh_out = janet_unmarshal(
                           janet_core_image,
                           janet_core_image_size,
                           0,
-                          env,
+                          dict,
                           NULL);
+
+    /* Memoize */
     janet_gcroot(marsh_out);
-    env = janet_unwrap_table(marsh_out);
-#endif
+    JanetTable *env = janet_unwrap_table(marsh_out);
+    janet_vm_core_env = env;
 
     return env;
 }
+
+#endif

src/core/debug.c

@@ -52,31 +52,35 @@ void janet_debug_unbreak(JanetFuncDef *def, int32_t pc) {
  */
 void janet_debug_find(
     JanetFuncDef **def_out, int32_t *pc_out,
-    const uint8_t *source, int32_t offset) {
+    const uint8_t *source, int32_t sourceLine, int32_t sourceColumn) {
     /* Scan the heap for right func def */
     JanetGCObject *current = janet_vm_blocks;
     /* Keep track of the best source mapping we have seen so far */
     int32_t besti = -1;
-    int32_t best_range = INT32_MAX;
+    int32_t best_line = -1;
+    int32_t best_column = -1;
     JanetFuncDef *best_def = NULL;
     while (NULL != current) {
         if ((current->flags & JANET_MEM_TYPEBITS) == JANET_MEMORY_FUNCDEF) {
-            JanetFuncDef *def = (JanetFuncDef *)(current + 1);
+            JanetFuncDef *def = (JanetFuncDef *)(current);
             if (def->sourcemap &&
                     def->source &&
                     !janet_string_compare(source, def->source)) {
                 /* Correct source file, check mappings. The chosen
-                 * pc index is the first match with the smallest range. */
+                 * pc index is the instruction closest to the given line column, but
+                 * not after. */
                 int32_t i;
                 for (i = 0; i < def->bytecode_length; i++) {
-                    int32_t start = def->sourcemap[i].start;
-                    int32_t end = def->sourcemap[i].end;
-                    if (end - start < best_range &&
-                            start <= offset &&
-                            end >= offset) {
-                        best_range = end - start;
-                        besti = i;
-                        best_def = def;
+                    int32_t line = def->sourcemap[i].line;
+                    int32_t column = def->sourcemap[i].column;
+                    if (line <= sourceLine && line >= best_line) {
+                        if (column <= sourceColumn &&
+                                (line > best_line || column > best_column)) {
+                            best_line = line;
+                            best_column = column;
+                            besti = i;
+                            best_def = def;
+                        }
                     }
                 }
             }
@@ -95,11 +99,13 @@ void janet_debug_find(
  * consitency with the top level code it is defined once. */
 void janet_stacktrace(JanetFiber *fiber, Janet err) {
     int32_t fi;
-    FILE *out = janet_dynfile("err", stderr);
     const char *errstr = (const char *)janet_to_string(err);
     JanetFiber **fibers = NULL;
     int wrote_error = 0;
 
+    int print_color = janet_truthy(janet_dyn("err-color"));
+    if (print_color) janet_eprintf("\x1b[31m");
+
     while (fiber) {
         janet_v_push(fibers, fiber);
         fiber = fiber->child;
@@ -117,46 +123,48 @@ void janet_stacktrace(JanetFiber *fiber, Janet err) {
             if (!wrote_error) {
                 JanetFiberStatus status = janet_fiber_status(fiber);
                 const char *prefix = status == JANET_STATUS_ERROR ? "" : "status ";
-                fprintf(out, "%s%s: %s\n",
-                        prefix,
-                        janet_status_names[status],
-                        errstr);
+                janet_eprintf("%s%s: %s\n",
+                              prefix,
+                              janet_status_names[status],
+                              errstr);
                 wrote_error = 1;
             }
 
-            fprintf(out, "  in");
+            janet_eprintf("  in");
 
             if (frame->func) {
                 def = frame->func->def;
-                fprintf(out, " %s", def->name ? (const char *)def->name : "<anonymous>");
+                janet_eprintf(" %s", def->name ? (const char *)def->name : "<anonymous>");
                 if (def->source) {
-                    fprintf(out, " [%s]", (const char *)def->source);
+                    janet_eprintf(" [%s]", (const char *)def->source);
                 }
             } else {
                 JanetCFunction cfun = (JanetCFunction)(frame->pc);
                 if (cfun) {
                     Janet name = janet_table_get(janet_vm_registry, janet_wrap_cfunction(cfun));
                     if (!janet_checktype(name, JANET_NIL))
-                        fprintf(out, " %s", (const char *)janet_to_string(name));
+                        janet_eprintf(" %s", (const char *)janet_to_string(name));
                     else
-                        fprintf(out, " <cfunction>");
+                        janet_eprintf(" <cfunction>");
                 }
             }
             if (frame->flags & JANET_STACKFRAME_TAILCALL)
-                fprintf(out, " (tailcall)");
+                janet_eprintf(" (tailcall)");
             if (frame->func && frame->pc) {
                 int32_t off = (int32_t)(frame->pc - def->bytecode);
                 if (def->sourcemap) {
                     JanetSourceMapping mapping = def->sourcemap[off];
-                    fprintf(out, " at (%d:%d)", mapping.start, mapping.end);
+                    janet_eprintf(" on line %d, column %d", mapping.line, mapping.column);
                 } else {
-                    fprintf(out, " pc=%d", off);
+                    janet_eprintf(" pc=%d", off);
                 }
             }
-            fprintf(out, "\n");
+            janet_eprintf("\n");
         }
     }
 
+    if (print_color) janet_eprintf("\x1b[0m");
+
     janet_v_free(fibers);
 }
 
@@ -167,10 +175,11 @@ void janet_stacktrace(JanetFiber *fiber, Janet err) {
 /* Helper to find funcdef and bytecode offset to insert or remove breakpoints.
  * Takes a source file name and byte offset. */
 static void helper_find(int32_t argc, Janet *argv, JanetFuncDef **def, int32_t *bytecode_offset) {
-    janet_fixarity(argc, 2);
+    janet_fixarity(argc, 3);
     const uint8_t *source = janet_getstring(argv, 0);
-    int32_t source_offset = janet_getinteger(argv, 1);
-    janet_debug_find(def, bytecode_offset, source, source_offset);
+    int32_t line = janet_getinteger(argv, 1);
+    int32_t col = janet_getinteger(argv, 2);
+    janet_debug_find(def, bytecode_offset, source, line, col);
 }
 
 /* Helper to find funcdef and bytecode offset to insert or remove breakpoints.
@@ -257,8 +266,8 @@ static Janet doframe(JanetStackFrame *frame) {
         janet_table_put(t, janet_ckeywordv("pc"), janet_wrap_integer(off));
         if (def->sourcemap) {
             JanetSourceMapping mapping = def->sourcemap[off];
-            janet_table_put(t, janet_ckeywordv("source-start"), janet_wrap_integer(mapping.start));
-            janet_table_put(t, janet_ckeywordv("source-end"), janet_wrap_integer(mapping.end));
+            janet_table_put(t, janet_ckeywordv("source-line"), janet_wrap_integer(mapping.line));
+            janet_table_put(t, janet_ckeywordv("source-column"), janet_wrap_integer(mapping.column));
         }
         if (def->source) {
             janet_table_put(t, janet_ckeywordv("source"), janet_wrap_string(def->source));
@@ -304,21 +313,29 @@ static Janet cfun_debug_argstack(int32_t argc, Janet *argv) {
     return janet_wrap_array(array);
 }
 
+static Janet cfun_debug_step(int32_t argc, Janet *argv) {
+    janet_arity(argc, 1, 2);
+    JanetFiber *fiber = janet_getfiber(argv, 0);
+    Janet out = janet_wrap_nil();
+    janet_step(fiber, argc == 1 ? janet_wrap_nil() : argv[1], &out);
+    return out;
+}
+
 static const JanetReg debug_cfuns[] = {
     {
         "debug/break", cfun_debug_break,
         JDOC("(debug/break source byte-offset)\n\n"
-             "Sets a breakpoint with source a key at a given byte offset. An offset "
-             "of 0 is the first byte in a file. Will throw an error if the breakpoint location "
+             "Sets a breakpoint with source a key at a given line and column. "
+             "Will throw an error if the breakpoint location "
              "cannot be found. For example\n\n"
              "\t(debug/break \"core.janet\" 1000)\n\n"
              "wil set a breakpoint at the 1000th byte of the file core.janet.")
     },
     {
         "debug/unbreak", cfun_debug_unbreak,
-        JDOC("(debug/unbreak source byte-offset)\n\n"
-             "Remove a breakpoint with a source key at a given byte offset. An offset "
-             "of 0 is the first byte in a file. Will throw an error if the breakpoint "
+        JDOC("(debug/unbreak source line column)\n\n"
+             "Remove a breakpoint with a source key at a given line and column. "
+             "Will throw an error if the breakpoint "
              "cannot be found.")
     },
     {
@@ -372,6 +389,13 @@ static const JanetReg debug_cfuns[] = {
              "the fiber handling the error can see which fiber raised the signal. This function should "
              "be used mostly for debugging purposes.")
     },
+    {
+        "debug/step", cfun_debug_step,
+        JDOC("(debug/step fiber &opt x)\n\n"
+             "Run a fiber for one virtual instruction of the Janet machine. Can optionally "
+             "pass in a value that will be passed as the resuming value. Returns the signal value, "
+             "which will usually be nil, as breakpoints raise nil signals.")
+    },
     {NULL, NULL, NULL}
 };
 

src/core/fiber.c

@@ -87,19 +87,27 @@ void janet_fiber_setcapacity(JanetFiber *fiber, int32_t n) {
     fiber->capacity = n;
 }
 
+/* Grow fiber if needed */
+static void janet_fiber_grow(JanetFiber *fiber, int32_t needed) {
+    int32_t cap = needed > (INT32_MAX / 2) ? INT32_MAX : 2 * needed;
+    janet_fiber_setcapacity(fiber, cap);
+}
+
 /* Push a value on the next stack frame */
 void janet_fiber_push(JanetFiber *fiber, Janet x) {
+    if (fiber->stacktop == INT32_MAX) janet_panic("stack overflow");
     if (fiber->stacktop >= fiber->capacity) {
-        janet_fiber_setcapacity(fiber, 2 * fiber->stacktop);
+        janet_fiber_grow(fiber, fiber->stacktop);
     }
     fiber->data[fiber->stacktop++] = x;
 }
 
 /* Push 2 values on the next stack frame */
 void janet_fiber_push2(JanetFiber *fiber, Janet x, Janet y) {
+    if (fiber->stacktop >= INT32_MAX - 1) janet_panic("stack overflow");
     int32_t newtop = fiber->stacktop + 2;
     if (newtop > fiber->capacity) {
-        janet_fiber_setcapacity(fiber, 2 * newtop);
+        janet_fiber_grow(fiber, newtop);
     }
     fiber->data[fiber->stacktop] = x;
     fiber->data[fiber->stacktop + 1] = y;
@@ -108,9 +116,10 @@ void janet_fiber_push2(JanetFiber *fiber, Janet x, Janet y) {
 
 /* Push 3 values on the next stack frame */
 void janet_fiber_push3(JanetFiber *fiber, Janet x, Janet y, Janet z) {
+    if (fiber->stacktop >= INT32_MAX - 2) janet_panic("stack overflow");
     int32_t newtop = fiber->stacktop + 3;
     if (newtop > fiber->capacity) {
-        janet_fiber_setcapacity(fiber, 2 * newtop);
+        janet_fiber_grow(fiber, newtop);
     }
     fiber->data[fiber->stacktop] = x;
     fiber->data[fiber->stacktop + 1] = y;
@@ -120,9 +129,10 @@ void janet_fiber_push3(JanetFiber *fiber, Janet x, Janet y, Janet z) {
 
 /* Push an array on the next stack frame */
 void janet_fiber_pushn(JanetFiber *fiber, const Janet *arr, int32_t n) {
+    if (fiber->stacktop > INT32_MAX - n) janet_panic("stack overflow");
     int32_t newtop = fiber->stacktop + n;
     if (newtop > fiber->capacity) {
-        janet_fiber_setcapacity(fiber, 2 * newtop);
+        janet_fiber_grow(fiber, newtop);
     }
     memcpy(fiber->data + fiber->stacktop, arr, n * sizeof(Janet));
     fiber->stacktop = newtop;

src/core/gc.c

@@ -40,6 +40,13 @@ JANET_THREAD_LOCAL uint32_t janet_vm_root_count;
 JANET_THREAD_LOCAL uint32_t janet_vm_root_capacity;
 
 /* Scratch Memory */
+#ifdef JANET_64
+#define SCRATCH_HDR_SIZE 16 /* smalloc must guarantee 16 byte alignment. */
+#elif JANET_32
+#define SCRATCH_HDR_SIZE 8  /* smalloc must guarantee 8 byte alignment. */
+#else
+#error "unknown scratch alignment"
+#endif
 JANET_THREAD_LOCAL void **janet_scratch_mem;
 JANET_THREAD_LOCAL size_t janet_scratch_cap;
 JANET_THREAD_LOCAL size_t janet_scratch_len;
@@ -347,10 +354,18 @@ void *janet_gcalloc(enum JanetMemoryType type, size_t size) {
     return (void *)mem;
 }
 
+static void free_one_scratch(void *mem) {
+    ScratchFinalizer finalize = *(ScratchFinalizer *)mem;
+    if (finalize)
+        finalize((char *)mem + SCRATCH_HDR_SIZE);
+    free(mem);
+}
+
 /* Free all allocated scratch memory */
 static void janet_free_all_scratch(void) {
-    for (size_t i = 0; i < janet_scratch_len; i++)
-        free(janet_scratch_mem[i]);
+    for (size_t i = 0; i < janet_scratch_len; i++) {
+        free_one_scratch(janet_scratch_mem[i]);
+    }
     janet_scratch_len = 0;
 }
 
@@ -457,10 +472,11 @@ void janet_gcunlock(int handle) {
 /* Scratch memory API */
 
 void *janet_smalloc(size_t size) {
-    void *mem = malloc(size);
+    void *mem = malloc(SCRATCH_HDR_SIZE + size);
     if (NULL == mem) {
         JANET_OUT_OF_MEMORY;
     }
+    *(ScratchFinalizer *)mem = NULL;
     if (janet_scratch_len == janet_scratch_cap) {
         size_t newcap = 2 * janet_scratch_cap + 2;
         void **newmem = (void **) realloc(janet_scratch_mem, newcap * sizeof(void *));
@@ -471,20 +487,21 @@ void *janet_smalloc(size_t size) {
         janet_scratch_mem = newmem;
     }
     janet_scratch_mem[janet_scratch_len++] = mem;
-    return mem;
+    return (char *)mem + SCRATCH_HDR_SIZE;
 }
 
 void *janet_srealloc(void *mem, size_t size) {
     if (NULL == mem) return janet_smalloc(size);
+    mem = (char *)mem - SCRATCH_HDR_SIZE;
     if (janet_scratch_len) {
         for (size_t i = janet_scratch_len - 1; ; i--) {
             if (janet_scratch_mem[i] == mem) {
-                void *newmem = realloc(mem, size);
+                void *newmem = realloc(mem, size + SCRATCH_HDR_SIZE);
                 if (NULL == newmem) {
                     JANET_OUT_OF_MEMORY;
                 }
                 janet_scratch_mem[i] = newmem;
-                return newmem;
+                return (char *)newmem + SCRATCH_HDR_SIZE;
             }
             if (i == 0) break;
         }
@@ -492,13 +509,19 @@ void *janet_srealloc(void *mem, size_t size) {
     janet_exit("invalid janet_srealloc");
 }
 
+void janet_sfinalizer(void *mem, ScratchFinalizer finalizer) {
+    mem = (char *)mem - SCRATCH_HDR_SIZE;
+    *(ScratchFinalizer *)mem = finalizer;
+}
+
 void janet_sfree(void *mem) {
     if (NULL == mem) return;
+    mem = (char *)mem - SCRATCH_HDR_SIZE;
     if (janet_scratch_len) {
         for (size_t i = janet_scratch_len - 1; ; i--) {
             if (janet_scratch_mem[i] == mem) {
                 janet_scratch_mem[i] = janet_scratch_mem[--janet_scratch_len];
-                free(mem);
+                free_one_scratch(mem);
                 return;
             }
             if (i == 0) break;

src/core/inttypes.c

@@ -36,26 +36,29 @@
 
 #define MAX_INT_IN_DBL 9007199254740992ULL /* 2^53 */
 
-static Janet it_s64_get(void *p, Janet key);
-static Janet it_u64_get(void *p, Janet key);
+static int it_s64_get(void *p, Janet key, Janet *out);
+static int it_u64_get(void *p, Janet key, Janet *out);
 
 static void int64_marshal(void *p, JanetMarshalContext *ctx) {
+    janet_marshal_abstract(ctx, p);
     janet_marshal_int64(ctx, *((int64_t *)p));
 }
 
-static void int64_unmarshal(void *p, JanetMarshalContext *ctx) {
-    *((int64_t *)p) = janet_unmarshal_int64(ctx);
+static void *int64_unmarshal(JanetMarshalContext *ctx) {
+    int64_t *p = janet_unmarshal_abstract(ctx, sizeof(int64_t));
+    p[0] = janet_unmarshal_int64(ctx);
+    return p;
 }
 
 static void it_s64_tostring(void *p, JanetBuffer *buffer) {
     char str[32];
-    sprintf(str, "<core/s64 %" PRId64 ">", *((int64_t *)p));
+    sprintf(str, "%" PRId64, *((int64_t *)p));
     janet_buffer_push_cstring(buffer, str);
 }
 
 static void it_u64_tostring(void *p, JanetBuffer *buffer) {
     char str[32];
-    sprintf(str, "<core/u64 %" PRIu64 ">", *((uint64_t *)p));
+    sprintf(str, "%" PRIu64, *((uint64_t *)p));
     janet_buffer_push_cstring(buffer, str);
 }
 
@@ -348,18 +351,18 @@ static JanetMethod it_u64_methods[] = {
     {NULL, NULL}
 };
 
-static Janet it_s64_get(void *p, Janet key) {
+static int it_s64_get(void *p, Janet key, Janet *out) {
     (void) p;
     if (!janet_checktype(key, JANET_KEYWORD))
-        janet_panicf("expected keyword, got %v", key);
-    return janet_getmethod(janet_unwrap_keyword(key), it_s64_methods);
+        return 0;
+    return janet_getmethod(janet_unwrap_keyword(key), it_s64_methods, out);
 }
 
-static Janet it_u64_get(void *p, Janet key) {
+static int it_u64_get(void *p, Janet key, Janet *out) {
     (void) p;
     if (!janet_checktype(key, JANET_KEYWORD))
-        janet_panicf("expected keyword, got %v", key);
-    return janet_getmethod(janet_unwrap_keyword(key), it_u64_methods);
+        return 0;
+    return janet_getmethod(janet_unwrap_keyword(key), it_u64_methods, out);
 }
 
 static const JanetReg it_cfuns[] = {

src/core/io.c

@@ -20,32 +20,18 @@
 * IN THE SOFTWARE.
 */
 
-/* Compiler feature test macros for things */
-#define _DEFAULT_SOURCE
-#define _BSD_SOURCE
-
-#include <stdio.h>
-#include <errno.h>
-
 #ifndef JANET_AMALG
 #include <janet.h>
 #include "util.h"
 #endif
 
+#include <stdio.h>
+#include <errno.h>
+
 #ifndef JANET_WINDOWS
 #include <sys/wait.h>
 #endif
 
-#define IO_WRITE 1
-#define IO_READ 2
-#define IO_APPEND 4
-#define IO_UPDATE 8
-#define IO_NOT_CLOSEABLE 16
-#define IO_CLOSED 32
-#define IO_BINARY 64
-#define IO_SERIALIZABLE 128
-#define IO_PIPED 256
-
 typedef struct IOFile IOFile;
 struct IOFile {
     FILE *file;
@@ -53,7 +39,7 @@ struct IOFile {
 };
 
 static int cfun_io_gc(void *p, size_t len);
-static Janet io_file_get(void *p, Janet);
+static int io_file_get(void *p, Janet key, Janet *out);
 
 JanetAbstractType cfun_io_filetype = {
     "core/file",
@@ -78,13 +64,13 @@ static int checkflags(const uint8_t *str) {
             janet_panicf("invalid flag %c, expected w, a, or r", *str);
             break;
         case 'w':
-            flags |= IO_WRITE;
+            flags |= JANET_FILE_WRITE;
             break;
         case 'a':
-            flags |= IO_APPEND;
+            flags |= JANET_FILE_APPEND;
             break;
         case 'r':
-            flags |= IO_READ;
+            flags |= JANET_FILE_READ;
             break;
     }
     for (i = 1; i < len; i++) {
@@ -93,12 +79,12 @@ static int checkflags(const uint8_t *str) {
                 janet_panicf("invalid flag %c, expected + or b", str[i]);
                 break;
             case '+':
-                if (flags & IO_UPDATE) return -1;
-                flags |= IO_UPDATE;
+                if (flags & JANET_FILE_UPDATE) return -1;
+                flags |= JANET_FILE_UPDATE;
                 break;
             case 'b':
-                if (flags & IO_BINARY) return -1;
-                flags |= IO_BINARY;
+                if (flags & JANET_FILE_BINARY) return -1;
+                flags |= JANET_FILE_BINARY;
                 break;
         }
     }
@@ -132,10 +118,10 @@ static Janet cfun_io_popen(int32_t argc, Janet *argv) {
                 !(fmode[0] == 'r' || fmode[0] == 'w')) {
             janet_panicf("invalid file mode :%S, expected :r or :w", fmode);
         }
-        flags = IO_PIPED | (fmode[0] == 'r' ? IO_READ : IO_WRITE);
+        flags = JANET_FILE_PIPED | (fmode[0] == 'r' ? JANET_FILE_READ : JANET_FILE_WRITE);
     } else {
         fmode = (const uint8_t *)"r";
-        flags = IO_PIPED | IO_READ;
+        flags = JANET_FILE_PIPED | JANET_FILE_READ;
     }
 #ifdef JANET_WINDOWS
 #define popen _popen
@@ -158,7 +144,7 @@ static Janet cfun_io_fopen(int32_t argc, Janet *argv) {
         flags = checkflags(fmode);
     } else {
         fmode = (const uint8_t *)"r";
-        flags = IO_READ;
+        flags = JANET_FILE_READ;
     }
     FILE *f = fopen((const char *)fname, (const char *)fmode);
     return f ? makef(f, flags) : janet_wrap_nil();
@@ -174,7 +160,7 @@ static Janet cfun_io_fdopen(int32_t argc, Janet *argv) {
         flags = checkflags(fmode);
     } else {
         fmode = (const uint8_t *)"r";
-        flags = IO_READ;
+        flags = JANET_FILE_READ;
     }
 #ifdef JANET_WINDOWS
 #define fdopen _fdopen
@@ -186,7 +172,7 @@ static Janet cfun_io_fdopen(int32_t argc, Janet *argv) {
 static Janet cfun_io_fileno(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 1);
     IOFile *iof = janet_getabstract(argv, 0, &cfun_io_filetype);
-    if (iof->flags & IO_CLOSED)
+    if (iof->flags & JANET_FILE_CLOSED)
         janet_panic("file is closed");
 #ifdef JANET_WINDOWS
 #define fileno _fileno
@@ -196,7 +182,7 @@ static Janet cfun_io_fileno(int32_t argc, Janet *argv) {
 
 /* Read up to n bytes into buffer. */
 static void read_chunk(IOFile *iof, JanetBuffer *buffer, int32_t nBytesMax) {
-    if (!(iof->flags & (IO_READ | IO_UPDATE)))
+    if (!(iof->flags & (JANET_FILE_READ | JANET_FILE_UPDATE)))
         janet_panic("file is not readable");
     janet_buffer_extra(buffer, nBytesMax);
     size_t ntoread = nBytesMax;
@@ -210,7 +196,7 @@ static void read_chunk(IOFile *iof, JanetBuffer *buffer, int32_t nBytesMax) {
 static Janet cfun_io_fread(int32_t argc, Janet *argv) {
     janet_arity(argc, 2, 3);
     IOFile *iof = janet_getabstract(argv, 0, &cfun_io_filetype);
-    if (iof->flags & IO_CLOSED) janet_panic("file is closed");
+    if (iof->flags & JANET_FILE_CLOSED) janet_panic("file is closed");
     JanetBuffer *buffer;
     if (argc == 2) {
         buffer = janet_buffer(0);
@@ -221,27 +207,11 @@ static Janet cfun_io_fread(int32_t argc, Janet *argv) {
     if (janet_checktype(argv[1], JANET_KEYWORD)) {
         const uint8_t *sym = janet_unwrap_keyword(argv[1]);
         if (!janet_cstrcmp(sym, "all")) {
-            /* Read whole file */
-            int status = fseek(iof->file, 0, SEEK_SET);
-            if (status) {
-                /* backwards fseek did not work (stream like popen) */
-                int32_t sizeBefore;
-                do {
-                    sizeBefore = buffer->count;
-                    read_chunk(iof, buffer, 1024);
-                } while (sizeBefore < buffer->count);
-            } else {
-                fseek(iof->file, 0, SEEK_END);
-                long fsize = ftell(iof->file);
-                if (fsize < 0) {
-                    janet_panicf("could not get file size of %v", argv[0]);
-                }
-                if (fsize > (INT32_MAX)) {
-                    janet_panic("file to large to read into buffer");
-                }
-                fseek(iof->file, 0, SEEK_SET);
-                read_chunk(iof, buffer, (int32_t) fsize);
-            }
+            int32_t sizeBefore;
+            do {
+                sizeBefore = buffer->count;
+                read_chunk(iof, buffer, 4096);
+            } while (sizeBefore < buffer->count);
             /* Never return nil for :all */
             return janet_wrap_buffer(buffer);
         } else if (!janet_cstrcmp(sym, "line")) {
@@ -266,9 +236,9 @@ static Janet cfun_io_fread(int32_t argc, Janet *argv) {
 static Janet cfun_io_fwrite(int32_t argc, Janet *argv) {
     janet_arity(argc, 1, -1);
     IOFile *iof = janet_getabstract(argv, 0, &cfun_io_filetype);
-    if (iof->flags & IO_CLOSED)
+    if (iof->flags & JANET_FILE_CLOSED)
         janet_panic("file is closed");
-    if (!(iof->flags & (IO_WRITE | IO_APPEND | IO_UPDATE)))
+    if (!(iof->flags & (JANET_FILE_WRITE | JANET_FILE_APPEND | JANET_FILE_UPDATE)))
         janet_panic("file is not writeable");
     int32_t i;
     /* Verify all arguments before writing to file */
@@ -289,9 +259,9 @@ static Janet cfun_io_fwrite(int32_t argc, Janet *argv) {
 static Janet cfun_io_fflush(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 1);
     IOFile *iof = janet_getabstract(argv, 0, &cfun_io_filetype);
-    if (iof->flags & IO_CLOSED)
+    if (iof->flags & JANET_FILE_CLOSED)
         janet_panic("file is closed");
-    if (!(iof->flags & (IO_WRITE | IO_APPEND | IO_UPDATE)))
+    if (!(iof->flags & (JANET_FILE_WRITE | JANET_FILE_APPEND | JANET_FILE_UPDATE)))
         janet_panic("file is not writeable");
     if (fflush(iof->file))
         janet_panic("could not flush file");
@@ -302,7 +272,7 @@ static Janet cfun_io_fflush(int32_t argc, Janet *argv) {
 static int cfun_io_gc(void *p, size_t len) {
     (void) len;
     IOFile *iof = (IOFile *)p;
-    if (!(iof->flags & (IO_NOT_CLOSEABLE | IO_CLOSED))) {
+    if (!(iof->flags & (JANET_FILE_NOT_CLOSEABLE | JANET_FILE_CLOSED))) {
         return fclose(iof->file);
     }
     return 0;
@@ -312,22 +282,22 @@ static int cfun_io_gc(void *p, size_t len) {
 static Janet cfun_io_fclose(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 1);
     IOFile *iof = janet_getabstract(argv, 0, &cfun_io_filetype);
-    if (iof->flags & IO_CLOSED)
+    if (iof->flags & JANET_FILE_CLOSED)
         janet_panic("file is closed");
-    if (iof->flags & (IO_NOT_CLOSEABLE))
+    if (iof->flags & (JANET_FILE_NOT_CLOSEABLE))
         janet_panic("file not closable");
-    if (iof->flags & IO_PIPED) {
+    if (iof->flags & JANET_FILE_PIPED) {
 #ifdef JANET_WINDOWS
 #define pclose _pclose
 #define WEXITSTATUS(x) x
 #endif
         int status = pclose(iof->file);
-        iof->flags |= IO_CLOSED;
+        iof->flags |= JANET_FILE_CLOSED;
         if (status == -1) janet_panic("could not close file");
         return janet_wrap_integer(WEXITSTATUS(status));
     } else {
         if (fclose(iof->file)) janet_panic("could not close file");
-        iof->flags |= IO_CLOSED;
+        iof->flags |= JANET_FILE_CLOSED;
         return janet_wrap_nil();
     }
 }
@@ -336,7 +306,7 @@ static Janet cfun_io_fclose(int32_t argc, Janet *argv) {
 static Janet cfun_io_fseek(int32_t argc, Janet *argv) {
     janet_arity(argc, 2, 3);
     IOFile *iof = janet_getabstract(argv, 0, &cfun_io_filetype);
-    if (iof->flags & IO_CLOSED)
+    if (iof->flags & JANET_FILE_CLOSED)
         janet_panic("file is closed");
     long int offset = 0;
     int whence = SEEK_CUR;
@@ -361,18 +331,19 @@ static Janet cfun_io_fseek(int32_t argc, Janet *argv) {
 
 static JanetMethod io_file_methods[] = {
     {"close", cfun_io_fclose},
-    {"read", cfun_io_fread},
-    {"write", cfun_io_fwrite},
+    {"fileno", cfun_io_fileno},
     {"flush", cfun_io_fflush},
+    {"read", cfun_io_fread},
     {"seek", cfun_io_fseek},
+    {"write", cfun_io_fwrite},
     {NULL, NULL}
 };
 
-static Janet io_file_get(void *p, Janet key) {
+static int io_file_get(void *p, Janet key, Janet *out) {
     (void) p;
     if (!janet_checktype(key, JANET_KEYWORD))
-        janet_panicf("expected keyword, got %v", key);
-    return janet_getmethod(janet_unwrap_keyword(key), io_file_methods);
+        return 0;
+    return janet_getmethod(janet_unwrap_keyword(key), io_file_methods, out);
 }
 
 FILE *janet_dynfile(const char *name, FILE *def) {
@@ -384,27 +355,215 @@ FILE *janet_dynfile(const char *name, FILE *def) {
     return iofile->file;
 }
 
-static Janet cfun_io_print(int32_t argc, Janet *argv) {
-    FILE *f = janet_dynfile("out", stdout);
-    for (int32_t i = 0; i < argc; ++i) {
-        int32_t j, len;
-        const uint8_t *vstr = janet_to_string(argv[i]);
-        len = janet_string_length(vstr);
-        for (j = 0; j < len; ++j) {
-            putc(vstr[j], f);
+static Janet cfun_io_print_impl(int32_t argc, Janet *argv,
+                                int newline, const char *name, FILE *dflt_file) {
+    FILE *f;
+    Janet x = janet_dyn(name);
+    switch (janet_type(x)) {
+        default:
+            /* Other values simply do nothing */
+            return janet_wrap_nil();
+        case JANET_BUFFER: {
+            /* Special case buffer */
+            JanetBuffer *buf = janet_unwrap_buffer(x);
+            for (int32_t i = 0; i < argc; ++i) {
+                janet_to_string_b(buf, argv[i]);
+            }
+            if (newline)
+                janet_buffer_push_u8(buf, '\n');
+            return janet_wrap_nil();
+        }
+        case JANET_NIL:
+            f = dflt_file;
+            break;
+        case JANET_ABSTRACT: {
+            void *abstract = janet_unwrap_abstract(x);
+            if (janet_abstract_type(abstract) != &cfun_io_filetype)
+                return janet_wrap_nil();
+            IOFile *iofile = abstract;
+            f = iofile->file;
+            break;
         }
     }
-    putc('\n', f);
+    for (int32_t i = 0; i < argc; ++i) {
+        int32_t len;
+        const uint8_t *vstr;
+        if (janet_checktype(argv[i], JANET_BUFFER)) {
+            JanetBuffer *b = janet_unwrap_buffer(argv[i]);
+            vstr = b->data;
+            len = b->count;
+        } else {
+            vstr = janet_to_string(argv[i]);
+            len = janet_string_length(vstr);
+        }
+        if (len) {
+            if (1 != fwrite(vstr, len, 1, f)) {
+                janet_panicf("could not print %d bytes to (dyn :%s)", len, name);
+            }
+        }
+    }
+    if (newline)
+        putc('\n', f);
     return janet_wrap_nil();
 }
 
+static Janet cfun_io_print(int32_t argc, Janet *argv) {
+    return cfun_io_print_impl(argc, argv, 1, "out", stdout);
+}
+
+static Janet cfun_io_prin(int32_t argc, Janet *argv) {
+    return cfun_io_print_impl(argc, argv, 0, "out", stdout);
+}
+
+static Janet cfun_io_eprint(int32_t argc, Janet *argv) {
+    return cfun_io_print_impl(argc, argv, 1, "err", stderr);
+}
+
+static Janet cfun_io_eprin(int32_t argc, Janet *argv) {
+    return cfun_io_print_impl(argc, argv, 0, "err", stderr);
+}
+
+static Janet cfun_io_printf_impl(int32_t argc, Janet *argv, int newline,
+                                 const char *name, FILE *dflt_file) {
+    FILE *f;
+    janet_arity(argc, 1, -1);
+    const char *fmt = janet_getcstring(argv, 0);
+    Janet x = janet_dyn(name);
+    switch (janet_type(x)) {
+        default:
+            /* Other values simply do nothing */
+            return janet_wrap_nil();
+        case JANET_BUFFER: {
+            /* Special case buffer */
+            JanetBuffer *buf = janet_unwrap_buffer(x);
+            janet_buffer_format(buf, fmt, 0, argc, argv);
+            if (newline) janet_buffer_push_u8(buf, '\n');
+            return janet_wrap_nil();
+        }
+        case JANET_NIL:
+            f = dflt_file;
+            break;
+        case JANET_ABSTRACT: {
+            void *abstract = janet_unwrap_abstract(x);
+            if (janet_abstract_type(abstract) != &cfun_io_filetype)
+                return janet_wrap_nil();
+            IOFile *iofile = abstract;
+            f = iofile->file;
+            break;
+        }
+    }
+    JanetBuffer *buf = janet_buffer(10);
+    janet_buffer_format(buf, fmt, 0, argc, argv);
+    if (newline) janet_buffer_push_u8(buf, '\n');
+    if (buf->count) {
+        if (1 != fwrite(buf->data, buf->count, 1, f)) {
+            janet_panicf("could not print %d bytes to file", buf->count, name);
+        }
+    }
+    /* Clear buffer to make things easier for GC */
+    buf->count = 0;
+    buf->capacity = 0;
+    free(buf->data);
+    buf->data = NULL;
+    return janet_wrap_nil();
+}
+
+static Janet cfun_io_printf(int32_t argc, Janet *argv) {
+    return cfun_io_printf_impl(argc, argv, 1, "out", stdout);
+}
+
+static Janet cfun_io_prinf(int32_t argc, Janet *argv) {
+    return cfun_io_printf_impl(argc, argv, 0, "out", stdout);
+}
+
+static Janet cfun_io_eprintf(int32_t argc, Janet *argv) {
+    return cfun_io_printf_impl(argc, argv, 1, "err", stderr);
+}
+
+static Janet cfun_io_eprinf(int32_t argc, Janet *argv) {
+    return cfun_io_printf_impl(argc, argv, 0, "err", stderr);
+}
+
+void janet_dynprintf(const char *name, FILE *dflt_file, const char *format, ...) {
+    va_list args;
+    va_start(args, format);
+    Janet x = janet_dyn(name);
+    JanetType xtype = janet_type(x);
+    switch (xtype) {
+        default:
+            /* Other values simply do nothing */
+            break;
+        case JANET_NIL:
+        case JANET_ABSTRACT: {
+            FILE *f = dflt_file;
+            JanetBuffer buffer;
+            int32_t len = 0;
+            while (format[len]) len++;
+            janet_buffer_init(&buffer, len);
+            janet_formatb(&buffer, format, args);
+            if (xtype == JANET_ABSTRACT) {
+                void *abstract = janet_unwrap_abstract(x);
+                if (janet_abstract_type(abstract) != &cfun_io_filetype)
+                    break;
+                IOFile *iofile = abstract;
+                f = iofile->file;
+            }
+            fwrite(buffer.data, buffer.count, 1, f);
+            janet_buffer_deinit(&buffer);
+            break;
+        }
+        case JANET_BUFFER:
+            janet_formatb(janet_unwrap_buffer(x), format, args);
+            break;
+    }
+    va_end(args);
+    return;
+}
+
 static const JanetReg io_cfuns[] = {
     {
         "print", cfun_io_print,
         JDOC("(print & xs)\n\n"
              "Print values to the console (standard out). Value are converted "
              "to strings if they are not already. After printing all values, a "
-             "newline character is printed. Returns nil.")
+             "newline character is printed. Use the value of (dyn :out stdout) to determine "
+             "what to push characters to. Expects (dyn :out stdout) to be either a core/file or "
+             "a buffer. Returns nil.")
+    },
+    {
+        "prin", cfun_io_prin,
+        JDOC("(prin & xs)\n\n"
+             "Same as print, but does not add trailing newline.")
+    },
+    {
+        "printf", cfun_io_printf,
+        JDOC("(printf fmt & xs)\n\n"
+             "Prints output formatted as if with (string/format fmt ;xs) to (dyn :out stdout) with a trailing newline.")
+    },
+    {
+        "prinf", cfun_io_prinf,
+        JDOC("(prinf fmt & xs)\n\n"
+             "Like printf but with no trailing newline.")
+    },
+    {
+        "eprin", cfun_io_eprin,
+        JDOC("(eprin & xs)\n\n"
+             "Same as prin, but uses (dyn :err stderr) instead of (dyn :out stdout).")
+    },
+    {
+        "eprint", cfun_io_eprint,
+        JDOC("(eprint & xs)\n\n"
+             "Same as print, but uses (dyn :err stderr) instead of (dyn :out stdout).")
+    },
+    {
+        "eprintf", cfun_io_eprintf,
+        JDOC("(eprintf fmt & xs)\n\n"
+             "Prints output formatted as if with (string/format fmt ;xs) to (dyn :err stderr) with a trailing newline.")
+    },
+    {
+        "eprinf", cfun_io_eprinf,
+        JDOC("(eprinf fmt & xs)\n\n"
+             "Like eprintf but with no trailing newline.")
     },
     {
         "file/open", cfun_io_fopen,
@@ -507,15 +666,15 @@ void janet_lib_io(JanetTable *env) {
 
     /* stdout */
     janet_core_def(env, "stdout",
-                   makef(stdout, IO_APPEND | IO_NOT_CLOSEABLE | IO_SERIALIZABLE),
+                   makef(stdout, JANET_FILE_APPEND | JANET_FILE_NOT_CLOSEABLE | JANET_FILE_SERIALIZABLE),
                    JDOC("The standard output file."));
     /* stderr */
     janet_core_def(env, "stderr",
-                   makef(stderr, IO_APPEND | IO_NOT_CLOSEABLE | IO_SERIALIZABLE),
+                   makef(stderr, JANET_FILE_APPEND | JANET_FILE_NOT_CLOSEABLE | JANET_FILE_SERIALIZABLE),
                    JDOC("The standard error file."));
     /* stdin */
     janet_core_def(env, "stdin",
-                   makef(stdin, IO_READ | IO_NOT_CLOSEABLE | IO_SERIALIZABLE),
+                   makef(stdin, JANET_FILE_READ | JANET_FILE_NOT_CLOSEABLE | JANET_FILE_SERIALIZABLE),
                    JDOC("The standard input file."));
 
 }

src/core/marsh.c

@@ -258,9 +258,9 @@ static void marshal_one_def(MarshalState *st, JanetFuncDef *def, int flags) {
         int32_t current = 0;
         for (int32_t i = 0; i < def->bytecode_length; i++) {
             JanetSourceMapping map = def->sourcemap[i];
-            pushint(st, map.start - current);
-            pushint(st, map.end - map.start);
-            current = map.end;
+            pushint(st, map.line - current);
+            pushint(st, map.column);
+            current = map.line;
         }
     }
 }
@@ -338,6 +338,13 @@ void janet_marshal_janet(JanetMarshalContext *ctx, Janet x) {
     marshal_one(st, x, ctx->flags + 1);
 }
 
+void janet_marshal_abstract(JanetMarshalContext *ctx, void *abstract) {
+    MarshalState *st = (MarshalState *)(ctx->m_state);
+    janet_table_put(&st->seen,
+                    janet_wrap_abstract(abstract),
+                    janet_wrap_integer(st->nextid++));
+}
+
 #define MARK_SEEN() \
     janet_table_put(&st->seen, x, janet_wrap_integer(st->nextid++))
 
@@ -345,11 +352,9 @@ static void marshal_one_abstract(MarshalState *st, Janet x, int flags) {
     void *abstract = janet_unwrap_abstract(x);
     const JanetAbstractType *at = janet_abstract_type(abstract);
     if (at->marshal) {
-        JanetMarshalContext context = {st, NULL, flags, NULL};
         pushbyte(st, LB_ABSTRACT);
         marshal_one(st, janet_csymbolv(at->name), flags + 1);
-        push64(st, (uint64_t) janet_abstract_size(abstract));
-        MARK_SEEN();
+        JanetMarshalContext context = {st, NULL, flags, NULL, at};
         at->marshal(abstract, &context);
     } else {
         janet_panicf("try to marshal unregistered abstract type, cannot marshal %p", x);
@@ -827,9 +832,8 @@ static const uint8_t *unmarshal_one_def(
             }
             for (int32_t i = 0; i < bytecode_length; i++) {
                 current += readint(st, &data);
-                def->sourcemap[i].start = current;
-                current += readint(st, &data);
-                def->sourcemap[i].end = current;
+                def->sourcemap[i].line = current;
+                def->sourcemap[i].column = readint(st, &data);
             }
         } else {
             def->sourcemap = NULL;
@@ -984,6 +988,11 @@ static const uint8_t *unmarshal_one_fiber(
     return data;
 }
 
+void janet_unmarshal_ensure(JanetMarshalContext *ctx, size_t size) {
+    UnmarshalState *st = (UnmarshalState *)(ctx->u_state);
+    MARSH_EOS(st, ctx->data + size);
+}
+
 int32_t janet_unmarshal_int(JanetMarshalContext *ctx) {
     UnmarshalState *st = (UnmarshalState *)(ctx->u_state);
     return readint(st, &(ctx->data));
@@ -1018,17 +1027,28 @@ Janet janet_unmarshal_janet(JanetMarshalContext *ctx) {
     return ret;
 }
 
+void *janet_unmarshal_abstract(JanetMarshalContext *ctx, size_t size) {
+    UnmarshalState *st = (UnmarshalState *)(ctx->u_state);
+    if (ctx->at == NULL) {
+        janet_panicf("janet_unmarshal_abstract called more than once");
+    }
+    void *p = janet_abstract(ctx->at, size);
+    janet_v_push(st->lookup, janet_wrap_abstract(p));
+    ctx->at = NULL;
+    return p;
+}
+
 static const uint8_t *unmarshal_one_abstract(UnmarshalState *st, const uint8_t *data, Janet *out, int flags) {
     Janet key;
     data = unmarshal_one(st, data, &key, flags + 1);
     const JanetAbstractType *at = janet_get_abstract_type(key);
     if (at == NULL) return NULL;
     if (at->unmarshal) {
-        void *p = janet_abstract(at, (size_t) read64(st, &data));
-        *out = janet_wrap_abstract(p);
-        JanetMarshalContext context = {NULL, st, flags, data};
-        janet_v_push(st->lookup, *out);
-        at->unmarshal(p, &context);
+        JanetMarshalContext context = {NULL, st, flags, data, at};
+        *out = janet_wrap_abstract(at->unmarshal(&context));
+        if (context.at != NULL) {
+            janet_panicf("janet_unmarshal_abstract not called");
+        }
         return context.data;
     }
     return NULL;

src/core/math.c

@@ -27,19 +27,198 @@
 #include "util.h"
 #endif
 
+static JANET_THREAD_LOCAL JanetRNG janet_vm_rng = {0, 0, 0, 0, 0};
+
+static int janet_rng_get(void *p, Janet key, Janet *out);
+
+static void janet_rng_marshal(void *p, JanetMarshalContext *ctx) {
+    JanetRNG *rng = (JanetRNG *)p;
+    janet_marshal_abstract(ctx, p);
+    janet_marshal_int(ctx, (int32_t) rng->a);
+    janet_marshal_int(ctx, (int32_t) rng->b);
+    janet_marshal_int(ctx, (int32_t) rng->c);
+    janet_marshal_int(ctx, (int32_t) rng->d);
+    janet_marshal_int(ctx, (int32_t) rng->counter);
+}
+
+static void *janet_rng_unmarshal(JanetMarshalContext *ctx) {
+    JanetRNG *rng = janet_unmarshal_abstract(ctx, sizeof(JanetRNG));
+    rng->a = (uint32_t) janet_unmarshal_int(ctx);
+    rng->b = (uint32_t) janet_unmarshal_int(ctx);
+    rng->c = (uint32_t) janet_unmarshal_int(ctx);
+    rng->d = (uint32_t) janet_unmarshal_int(ctx);
+    rng->counter = (uint32_t) janet_unmarshal_int(ctx);
+    return rng;
+}
+
+static JanetAbstractType JanetRNG_type = {
+    "core/rng",
+    NULL,
+    NULL,
+    janet_rng_get,
+    NULL,
+    janet_rng_marshal,
+    janet_rng_unmarshal,
+    NULL
+};
+
+JanetRNG *janet_default_rng(void) {
+    return &janet_vm_rng;
+}
+
+void janet_rng_seed(JanetRNG *rng, uint32_t seed) {
+    rng->a = seed;
+    rng->b = 0x97654321u;
+    rng->c = 123871873u;
+    rng->d = 0xf23f56c8u;
+    rng->counter = 0u;
+    /* First several numbers aren't that random. */
+    for (int i = 0; i < 16; i++) janet_rng_u32(rng);
+}
+
+void janet_rng_longseed(JanetRNG *rng, const uint8_t *bytes, int32_t len) {
+    uint8_t state[16] = {0};
+    for (int32_t i = 0; i < len; i++)
+        state[i & 0xF] ^= bytes[i];
+    rng->a = state[0] + (state[1] << 8) + (state[2] << 16) + (state[3] << 24);
+    rng->b = state[4] + (state[5] << 8) + (state[6] << 16) + (state[7] << 24);
+    rng->c = state[8] + (state[9] << 8) + (state[10] << 16) + (state[11] << 24);
+    rng->d = state[12] + (state[13] << 8) + (state[14] << 16) + (state[15] << 24);
+    rng->counter = 0u;
+    /* a, b, c, d can't all be 0 */
+    if (rng->a == 0) rng->a = 1u;
+    for (int i = 0; i < 16; i++) janet_rng_u32(rng);
+}
+
+uint32_t janet_rng_u32(JanetRNG *rng) {
+    /* Algorithm "xorwow" from p. 5 of Marsaglia, "Xorshift RNGs" */
+    uint32_t t = rng->d;
+    uint32_t const s = rng->a;
+    rng->d = rng->c;
+    rng->c = rng->b;
+    rng->b = s;
+    t ^= t >> 2;
+    t ^= t << 1;
+    t ^= s ^ (s << 4);
+    rng->a = t;
+    rng->counter += 362437;
+    return t + rng->counter;
+}
+
+double janet_rng_double(JanetRNG *rng) {
+    uint32_t hi = janet_rng_u32(rng);
+    uint32_t lo = janet_rng_u32(rng);
+    uint64_t big = (uint64_t)(lo) | (((uint64_t) hi) << 32);
+    return ldexp((double)(big >> (64 - 52)), -52);
+}
+
+static Janet cfun_rng_make(int32_t argc, Janet *argv) {
+    janet_arity(argc, 0, 1);
+    JanetRNG *rng = janet_abstract(&JanetRNG_type, sizeof(JanetRNG));
+    if (argc == 1) {
+        if (janet_checkint(argv[0])) {
+            uint32_t seed = (uint32_t)(janet_getinteger(argv, 0));
+            janet_rng_seed(rng, seed);
+        } else {
+            JanetByteView bytes = janet_getbytes(argv, 0);
+            janet_rng_longseed(rng, bytes.bytes, bytes.len);
+        }
+    } else {
+        janet_rng_seed(rng, 0);
+    }
+    return janet_wrap_abstract(rng);
+}
+
+static Janet cfun_rng_uniform(int32_t argc, Janet *argv) {
+    janet_fixarity(argc, 1);
+    JanetRNG *rng = janet_getabstract(argv, 0, &JanetRNG_type);
+    return janet_wrap_number(janet_rng_double(rng));
+}
+
+static Janet cfun_rng_int(int32_t argc, Janet *argv) {
+    janet_arity(argc, 1, 2);
+    JanetRNG *rng = janet_getabstract(argv, 0, &JanetRNG_type);
+    if (argc == 1) {
+        uint32_t word = janet_rng_u32(rng) >> 1;
+        return janet_wrap_integer(word);
+    } else {
+        int32_t max = janet_optnat(argv, argc, 1, INT32_MAX);
+        if (max == 0) return janet_wrap_number(0.0);
+        uint32_t modulo = (uint32_t) max;
+        uint32_t maxgen = INT32_MAX;
+        uint32_t maxword = maxgen - (maxgen % modulo);
+        uint32_t word;
+        do {
+            word = janet_rng_u32(rng) >> 1;
+        } while (word > maxword);
+        return janet_wrap_integer(word % modulo);
+    }
+}
+
+static void rng_get_4bytes(JanetRNG *rng, uint8_t *buf) {
+    uint32_t word = janet_rng_u32(rng);
+    buf[0] = word & 0xFF;
+    buf[1] = (word >> 8) & 0xFF;
+    buf[2] = (word >> 16) & 0xFF;
+    buf[3] = (word >> 24) & 0xFF;
+}
+
+static Janet cfun_rng_buffer(int32_t argc, Janet *argv) {
+    janet_arity(argc, 2, 3);
+    JanetRNG *rng = janet_getabstract(argv, 0, &JanetRNG_type);
+    int32_t n = janet_getnat(argv, 1);
+    JanetBuffer *buffer = janet_optbuffer(argv, argc, 2, n);
+
+    /* Split into first part (that is divisible by 4), and rest */
+    int32_t first_part = n & ~3;
+    int32_t second_part = n - first_part;
+
+    /* Get first part in chunks of 4 bytes */
+    janet_buffer_extra(buffer, n);
+    uint8_t *buf = buffer->data + buffer->count;
+    for (int32_t i = 0; i < first_part; i += 4) rng_get_4bytes(rng, buf + i);
+    buffer->count += first_part;
+
+    /* Get remaining 0 - 3 bytes */
+    if (second_part) {
+        uint8_t wordbuf[4] = {0};
+        rng_get_4bytes(rng, wordbuf);
+        janet_buffer_push_bytes(buffer, wordbuf, second_part);
+    }
+
+    return janet_wrap_buffer(buffer);
+}
+
+static const JanetMethod rng_methods[] = {
+    {"uniform", cfun_rng_uniform},
+    {"int", cfun_rng_int},
+    {"buffer", cfun_rng_buffer},
+    {NULL, NULL}
+};
+
+static int janet_rng_get(void *p, Janet key, Janet *out) {
+    (void) p;
+    if (!janet_checktype(key, JANET_KEYWORD)) return 0;
+    return janet_getmethod(janet_unwrap_keyword(key), rng_methods, out);
+}
+
 /* Get a random number */
 static Janet janet_rand(int32_t argc, Janet *argv) {
     (void) argv;
     janet_fixarity(argc, 0);
-    double r = (rand() % RAND_MAX) / ((double) RAND_MAX);
-    return janet_wrap_number(r);
+    return janet_wrap_number(janet_rng_double(&janet_vm_rng));
 }
 
 /* Seed the random number generator */
 static Janet janet_srand(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 1);
-    int32_t x = janet_getinteger(argv, 0);
-    srand((unsigned) x);
+    if (janet_checkint(argv[0])) {
+        uint32_t seed = (uint32_t)(janet_getinteger(argv, 0));
+        janet_rng_seed(&janet_vm_rng, seed);
+    } else {
+        JanetByteView bytes = janet_getbytes(argv, 0);
+        janet_rng_longseed(&janet_vm_rng, bytes.bytes, bytes.len);
+    }
     return janet_wrap_nil();
 }
 
@@ -62,17 +241,26 @@ JANET_DEFINE_MATHOP(asin, asin)
 JANET_DEFINE_MATHOP(atan, atan)
 JANET_DEFINE_MATHOP(cos, cos)
 JANET_DEFINE_MATHOP(cosh, cosh)
+JANET_DEFINE_MATHOP(acosh, acosh)
 JANET_DEFINE_MATHOP(sin, sin)
 JANET_DEFINE_MATHOP(sinh, sinh)
+JANET_DEFINE_MATHOP(asinh, asinh)
 JANET_DEFINE_MATHOP(tan, tan)
 JANET_DEFINE_MATHOP(tanh, tanh)
+JANET_DEFINE_MATHOP(atanh, atanh)
 JANET_DEFINE_MATHOP(exp, exp)
+JANET_DEFINE_MATHOP(exp2, exp2)
+JANET_DEFINE_MATHOP(expm1, expm1)
 JANET_DEFINE_MATHOP(log, log)
 JANET_DEFINE_MATHOP(log10, log10)
+JANET_DEFINE_MATHOP(log2, log2)
 JANET_DEFINE_MATHOP(sqrt, sqrt)
+JANET_DEFINE_MATHOP(cbrt, cbrt)
 JANET_DEFINE_MATHOP(ceil, ceil)
 JANET_DEFINE_MATHOP(fabs, fabs)
 JANET_DEFINE_MATHOP(floor, floor)
+JANET_DEFINE_MATHOP(trunc, trunc)
+JANET_DEFINE_MATHOP(round, round)
 
 #define JANET_DEFINE_MATH2OP(name, fop)\
 static Janet janet_##name(int32_t argc, Janet *argv) {\
@@ -84,6 +272,7 @@ static Janet janet_##name(int32_t argc, Janet *argv) {\
 
 JANET_DEFINE_MATH2OP(atan2, atan2)
 JANET_DEFINE_MATH2OP(pow, pow)
+JANET_DEFINE_MATH2OP(hypot, hypot)
 
 static Janet janet_not(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 1);
@@ -108,8 +297,8 @@ static const JanetReg math_cfuns[] = {
     {
         "math/seedrandom", janet_srand,
         JDOC("(math/seedrandom seed)\n\n"
-             "Set the seed for the random number generator. 'seed' should be an "
-             "an integer.")
+             "Set the seed for the random number generator. seed should be "
+             "an integer or a buffer.")
     },
     {
         "math/cos", janet_cos,
@@ -156,11 +345,21 @@ static const JanetReg math_cfuns[] = {
         JDOC("(math/log10 x)\n\n"
              "Returns log base 10 of x.")
     },
+    {
+        "math/log2", janet_log2,
+        JDOC("(math/log2 x)\n\n"
+             "Returns log base 2 of x.")
+    },
     {
         "math/sqrt", janet_sqrt,
         JDOC("(math/sqrt x)\n\n"
              "Returns the square root of x.")
     },
+    {
+        "math/cbrt", janet_cbrt,
+        JDOC("(math/cbrt x)\n\n"
+             "Returns the cube root of x.")
+    },
     {
         "math/floor", janet_floor,
         JDOC("(math/floor x)\n\n"
@@ -196,17 +395,82 @@ static const JanetReg math_cfuns[] = {
         JDOC("(math/tanh x)\n\n"
              "Return the hyperbolic tangent of x.")
     },
+    {
+        "math/atanh", janet_atanh,
+        JDOC("(math/atanh x)\n\n"
+             "Return the hyperbolic arctangent of x.")
+    },
+    {
+        "math/asinh", janet_asinh,
+        JDOC("(math/asinh x)\n\n"
+             "Return the hyperbolic arcsine of x.")
+    },
+    {
+        "math/acosh", janet_acosh,
+        JDOC("(math/acosh x)\n\n"
+             "Return the hyperbolic arccosine of x.")
+    },
     {
         "math/atan2", janet_atan2,
         JDOC("(math/atan2 y x)\n\n"
              "Return the arctangent of y/x. Works even when x is 0.")
     },
+    {
+        "math/rng", cfun_rng_make,
+        JDOC("(math/rng &opt seed)\n\n"
+             "Creates a Psuedo-Random number generator, with an optional seed. "
+             "The seed should be an unsigned 32 bit integer. "
+             "Do not use this for cryptography. Returns a core/rng abstract type.")
+    },
+    {
+        "math/rng-uniform", cfun_rng_uniform,
+        JDOC("(math/rng-seed rng seed)\n\n"
+             "Extract a random number in the range [0, 1) from the RNG.")
+    },
+    {
+        "math/rng-int", cfun_rng_int,
+        JDOC("(math/rng-int rng &opt max)\n\n"
+             "Extract a random random integer in the range [0, max] from the RNG. If "
+             "no max is given, the default is 2^31 - 1.")
+    },
+    {
+        "math/rng-buffer", cfun_rng_buffer,
+        JDOC("(math/rng-buffer rng n &opt buf)\n\n"
+             "Get n random bytes and put them in a buffer. Creates a new buffer if no buffer is "
+             "provided, otherwise appends to the given buffer. Returns the buffer.")
+    },
+    {
+        "math/hypot", janet_hypot,
+        JDOC("(math/hypot a b)\n\n"
+             "Returns the c from the equation c^2 = a^2 + b^2")
+    },
+    {
+        "math/exp2", janet_exp2,
+        JDOC("(math/exp2 x)\n\n"
+             "Returns 2 to the power of x.")
+    },
+    {
+        "math/expm1", janet_expm1,
+        JDOC("(math/expm1 x)\n\n"
+             "Returns e to the power of x minus 1.")
+    },
+    {
+        "math/trunc", janet_trunc,
+        JDOC("(math/trunc x)\n\n"
+             "Returns the integer between x and 0 nearest to x.")
+    },
+    {
+        "math/round", janet_round,
+        JDOC("(math/round x)\n\n"
+             "Returns the integer nearest to x.")
+    },
     {NULL, NULL, NULL}
 };
 
 /* Module entry point */
 void janet_lib_math(JanetTable *env) {
     janet_core_cfuns(env, NULL, math_cfuns);
+    janet_register_abstract_type(&JanetRNG_type);
 #ifdef JANET_BOOTSTRAP
     janet_def(env, "math/pi", janet_wrap_number(3.1415926535897931),
               JDOC("The value pi."));
@@ -214,5 +478,7 @@ void janet_lib_math(JanetTable *env) {
               JDOC("The base of the natural log."));
     janet_def(env, "math/inf", janet_wrap_number(INFINITY),
               JDOC("The number representing positive infinity"));
+    janet_def(env, "math/-inf", janet_wrap_number(-INFINITY),
+              JDOC("The number representing negative infinity"));
 #endif
 }

src/core/os.c

@@ -25,10 +25,9 @@
 #include "util.h"
 #endif
 
-#include <stdlib.h>
-
 #ifndef JANET_REDUCED_OS
 
+#include <stdlib.h>
 #include <time.h>
 #include <fcntl.h>
 #include <errno.h>
@@ -36,6 +35,8 @@
 #include <string.h>
 #include <sys/stat.h>
 
+#define RETRY_EINTR(RC, CALL) do { (RC) = CALL; } while((RC) < 0 && errno == EINTR)
+
 #ifdef JANET_WINDOWS
 #include <windows.h>
 #include <direct.h>
@@ -58,22 +59,33 @@ extern char **environ;
 #include <mach/mach.h>
 #endif
 
+/* Setting C99 standard makes this not available, but it should
+ * work/link properly if we detect a BSD */
+#if defined(JANET_BSD) || defined(JANET_APPLE)
+void arc4random_buf(void *buf, size_t nbytes);
+#endif
+
 #endif /* JANET_REDCUED_OS */
 
 /* Core OS functions */
 
 /* Full OS functions */
 
+#define janet_stringify1(x) #x
+#define janet_stringify(x) janet_stringify1(x)
+
 static Janet os_which(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 0);
     (void) argv;
-#ifdef JANET_WINDOWS
+#if defined(JANET_OS_NAME)
+    return janet_ckeywordv(janet_stringify(JANET_OS_NAME));
+#elif defined(JANET_WINDOWS)
     return janet_ckeywordv("windows");
-#elif __APPLE__
+#elif defined(JANET_APPLE)
     return janet_ckeywordv("macos");
 #elif defined(__EMSCRIPTEN__)
     return janet_ckeywordv("web");
-#elif defined(__linux__)
+#elif defined(JANET_LINUX)
     return janet_ckeywordv("linux");
 #elif defined(__FreeBSD__)
     return janet_ckeywordv("freebsd");
@@ -81,11 +93,40 @@ static Janet os_which(int32_t argc, Janet *argv) {
     return janet_ckeywordv("netbsd");
 #elif defined(__OpenBSD__)
     return janet_ckeywordv("openbsd");
+#elif defined(JANET_BSD)
+    return janet_ckeywordv("bsd");
 #else
     return janet_ckeywordv("posix");
 #endif
 }
 
+/* Detect the ISA we are compiled for */
+static Janet os_arch(int32_t argc, Janet *argv) {
+    janet_fixarity(argc, 0);
+    (void) argv;
+    /* Check 64-bit vs 32-bit */
+#if defined(JANET_ARCH_NAME)
+    return janet_ckeywordv(janet_stringify(JANET_ARCH_NAME));
+#elif defined(__EMSCRIPTEN__)
+    return janet_ckeywordv("wasm");
+#elif (defined(__x86_64__) || defined(_M_X64))
+    return janet_ckeywordv("x64");
+#elif defined(__i386) || defined(_M_IX86)
+    return janet_ckeywordv("x86");
+#elif defined(_M_ARM64) || defined(__aarch64__)
+    return janet_ckeywordv("aarch64");
+#elif defined(_M_ARM) || defined(__arm__)
+    return janet_ckeywordv("arm");
+#elif (defined(__sparc__))
+    return janet_ckeywordv("sparc");
+#else
+    return janet_ckeywordv("unknown");
+#endif
+}
+
+#undef janet_stringify1
+#undef janet_stringify
+
 static Janet os_exit(int32_t argc, Janet *argv) {
     janet_arity(argc, 0, 1);
     if (argc == 0) {
@@ -263,7 +304,7 @@ static Janet os_execute(int32_t argc, Janet *argv) {
 #ifdef JANET_WINDOWS
 
     JanetBuffer *buf = os_exec_escape(exargs);
-    if (buf->count > 1025) {
+    if (buf->count > 8191) {
         janet_panic("command line string too long");
     }
     const char *path = (const char *) janet_unwrap_string(exargs.items[0]);
@@ -290,7 +331,7 @@ static Janet os_execute(int32_t argc, Janet *argv) {
 
     /* Check error */
     if (-1 == status) {
-        janet_panic(strerror(errno));
+        janet_panicf("%p: %s", argv[0], strerror(errno));
     }
 
     return janet_wrap_integer(status);
@@ -319,7 +360,7 @@ static Janet os_execute(int32_t argc, Janet *argv) {
     /* Wait for child */
     if (status) {
         os_execute_cleanup(envp, child_argv);
-        janet_panic(strerror(status));
+        janet_panicf("%p: %s", argv[0], strerror(errno));
     } else {
         waitpid(pid, &status, 0);
     }
@@ -340,6 +381,30 @@ static Janet os_shell(int32_t argc, Janet *argv) {
            : janet_wrap_boolean(stat);
 }
 
+static Janet os_environ(int32_t argc, Janet *argv) {
+    (void) argv;
+    janet_fixarity(argc, 0);
+    int32_t nenv = 0;
+    char **env = environ;
+    while (*env++)
+        nenv += 1;
+    JanetTable *t = janet_table(nenv);
+    for (int32_t i = 0; i < nenv; i++) {
+        char *e = environ[i];
+        char *eq = strchr(e, '=');
+        if (!eq) janet_panic("no '=' in environ");
+        char *v = eq + 1;
+        int32_t full_len = (int32_t) strlen(e);
+        int32_t val_len = (int32_t) strlen(v);
+        janet_table_put(
+            t,
+            janet_stringv((const uint8_t *)e, full_len - val_len - 1),
+            janet_stringv((const uint8_t *)v, val_len)
+        );
+    }
+    return janet_wrap_table(t);
+}
+
 static Janet os_getenv(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 1);
     const char *cstr = janet_getcstring(argv, 0);
@@ -377,9 +442,10 @@ static Janet os_time(int32_t argc, Janet *argv) {
 /* Clock shims */
 #ifdef JANET_WINDOWS
 static int gettime(struct timespec *spec) {
-    int64_t wintime = 0LL;
-    GetSystemTimeAsFileTime((FILETIME *)&wintime);
-    /* Windows epoch is January 1, 1601 apparently*/
+    FILETIME ftime;
+    GetSystemTimeAsFileTime(&ftime);
+    int64_t wintime = (int64_t)(ftime.dwLowDateTime) | ((int64_t)(ftime.dwHighDateTime) << 32);
+    /* Windows epoch is January 1, 1601 apparently */
     wintime -= 116444736000000000LL;
     spec->tv_sec  = wintime / 10000000LL;
     /* Resolution is 100 nanoseconds. */
@@ -417,12 +483,13 @@ static Janet os_sleep(int32_t argc, Janet *argv) {
 #ifdef JANET_WINDOWS
     Sleep((DWORD)(delay * 1000));
 #else
+    int rc;
     struct timespec ts;
     ts.tv_sec = (time_t) delay;
     ts.tv_nsec = (delay <= UINT32_MAX)
                  ? (long)((delay - ((uint32_t)delay)) * 1000000000)
                  : 0;
-    nanosleep(&ts, NULL);
+    RETRY_EINTR(rc, nanosleep(&ts, &ts));
 #endif
     return janet_wrap_nil();
 }
@@ -441,17 +508,95 @@ static Janet os_cwd(int32_t argc, Janet *argv) {
     return janet_cstringv(ptr);
 }
 
+static Janet os_cryptorand(int32_t argc, Janet *argv) {
+    JanetBuffer *buffer;
+    const char *genericerr = "unable to get sufficient random data";
+    janet_arity(argc, 1, 2);
+    int32_t offset;
+    int32_t n = janet_getinteger(argv, 0);
+    if (n < 0) janet_panic("expected positive integer");
+    if (argc == 2) {
+        buffer = janet_getbuffer(argv, 1);
+        offset = buffer->count;
+    } else {
+        offset = 0;
+        buffer = janet_buffer(n);
+    }
+    /* We could optimize here by adding setcount_uninit */
+    janet_buffer_setcount(buffer, offset + n);
+
+#ifdef JANET_WINDOWS
+    for (int32_t i = offset; i < buffer->count; i += sizeof(unsigned int)) {
+        unsigned int v;
+        if (rand_s(&v))
+            janet_panic(genericerr);
+        for (int32_t j = 0; (j < sizeof(unsigned int)) && (i + j < buffer->count); j++) {
+            buffer->data[i + j] = v & 0xff;
+            v = v >> 8;
+        }
+    }
+#elif defined(JANET_LINUX)
+    /* We should be able to call getrandom on linux, but it doesn't seem
+       to be uniformly supported on linux distros.
+       In both cases, use this fallback path for now... */
+    int rc;
+    int randfd;
+    RETRY_EINTR(randfd, open("/dev/urandom", O_RDONLY));
+    if (randfd < 0)
+        janet_panic(genericerr);
+    while (n > 0) {
+        ssize_t nread;
+        RETRY_EINTR(nread, read(randfd, buffer->data + offset, n));
+        if (nread <= 0) {
+            RETRY_EINTR(rc, close(randfd));
+            janet_panic(genericerr);
+        }
+        offset += nread;
+        n -= nread;
+    }
+    RETRY_EINTR(rc, close(randfd));
+#elif defined(JANET_BSD) || defined(JANET_APPLE)
+    (void) genericerr;
+    arc4random_buf(buffer->data + offset, n);
+#else
+    (void) genericerr;
+    janet_panic("cryptorand currently unsupported on this platform");
+#endif
+    return janet_wrap_buffer(buffer);
+}
+
 static Janet os_date(int32_t argc, Janet *argv) {
-    janet_arity(argc, 0, 1);
+    janet_arity(argc, 0, 2);
     (void) argv;
     time_t t;
-    struct tm *t_info;
+    struct tm t_infos;
+    struct tm *t_info = NULL;
     if (argc) {
-        t = (time_t) janet_getinteger64(argv, 0);
+        int64_t integer = janet_getinteger64(argv, 0);
+        if (integer < 0)
+            janet_panicf("expected non-negative 64 bit signed integer, got %v", argv[0]);
+        t = (time_t) integer;
     } else {
         time(&t);
     }
-    t_info = localtime(&t);
+    if (argc >= 2 && janet_truthy(argv[2])) {
+        /* local time */
+#ifdef JANET_WINDOWS
+        localtime_s(&t_infos, &t);
+        t_info = &t_infos;
+#else
+        tzset();
+        t_info = localtime_r(&t, &t_infos);
+#endif
+    } else {
+        /* utc time */
+#ifdef JANET_WINDOWS
+        gmtime_s(&t_infos, &t);
+        t_info = &t_infos;
+#else
+        t_info = gmtime_r(&t, &t_infos);
+#endif
+    }
     JanetKV *st = janet_struct_begin(9);
     janet_struct_put(st, janet_ckeywordv("seconds"), janet_wrap_number(t_info->tm_sec));
     janet_struct_put(st, janet_ckeywordv("minutes"), janet_wrap_number(t_info->tm_min));
@@ -476,7 +621,7 @@ static Janet os_link(int32_t argc, Janet *argv) {
     const char *oldpath = janet_getcstring(argv, 0);
     const char *newpath = janet_getcstring(argv, 1);
     int res = ((argc == 3 && janet_getboolean(argv, 2)) ? symlink : link)(oldpath, newpath);
-    if (res == -1) janet_panic(strerror(errno));
+    if (-1 == res) janet_panicf("%s: %s -> %s", strerror(errno), oldpath, newpath);
     return janet_wrap_integer(res);
 #endif
 }
@@ -500,7 +645,7 @@ static Janet os_rmdir(int32_t argc, Janet *argv) {
 #else
     int res = rmdir(path);
 #endif
-    if (res == -1) janet_panic(strerror(errno));
+    if (-1 == res) janet_panicf("%s: %s", strerror(errno), path);
     return janet_wrap_nil();
 }
 
@@ -512,7 +657,7 @@ static Janet os_cd(int32_t argc, Janet *argv) {
 #else
     int res = chdir(path);
 #endif
-    if (res == -1) janet_panic(strerror(errno));
+    if (-1 == res) janet_panicf("%s: %s", strerror(errno), path);
     return janet_wrap_nil();
 }
 
@@ -540,7 +685,7 @@ static Janet os_remove(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 1);
     const char *path = janet_getcstring(argv, 0);
     int status = remove(path);
-    if (-1 == status) janet_panic(strerror(errno));
+    if (-1 == status) janet_panicf("%s: %s", strerror(errno), path);
     return janet_wrap_nil();
 }
 
@@ -783,7 +928,24 @@ static const JanetReg os_cfuns[] = {
         JDOC("(os/getenv variable)\n\n"
              "Get the string value of an environment variable.")
     },
+    {
+        "os/arch", os_arch,
+        JDOC("(os/arch)\n\n"
+             "Check the ISA that janet was compiled for. Returns one of:\n\n"
+             "\t:x86\n"
+             "\t:x86-64\n"
+             "\t:arm\n"
+             "\t:aarch64\n"
+             "\t:sparc\n"
+             "\t:wasm\n"
+             "\t:unknown\n")
+    },
 #ifndef JANET_REDUCED_OS
+    {
+        "os/environ", os_environ,
+        JDOC("(os/environ)\n\n"
+             "Get a copy of the os environment table.")
+    },
     {
         "os/dir", os_dir,
         JDOC("(os/dir dir &opt array)\n\n"
@@ -887,11 +1049,18 @@ static const JanetReg os_cfuns[] = {
         JDOC("(os/cwd)\n\n"
              "Returns the current working directory.")
     },
+    {
+        "os/cryptorand", os_cryptorand,
+        JDOC("(os/cryptorand n &opt buf)\n\n"
+             "Get or append n bytes of good quality random data provided by the os. Returns a new buffer or buf.")
+    },
     {
         "os/date", os_date,
-        JDOC("(os/date &opt time)\n\n"
+        JDOC("(os/date &opt time local)\n\n"
              "Returns the given time as a date struct, or the current time if no time is given. "
-             "Returns a struct with following key values. Note that all numbers are 0-indexed.\n\n"
+             "Returns a struct with following key values. Note that all numbers are 0-indexed. "
+             "Date is given in UTC unless local is truthy, in which case the date is formated for "
+             "the local timezone.\n\n"
              "\t:seconds - number of seconds [0-61]\n"
              "\t:minutes - number of minutes [0-59]\n"
              "\t:hours - number of hours [0-23]\n"

src/core/parse.c

@@ -38,7 +38,7 @@ static int is_whitespace(uint8_t c) {
 
 /* Code generated by tools/symcharsgen.c.
  * The table contains 256 bits, where each bit is 1
- * if the corresponding ascci code is a symbol char, and 0
+ * if the corresponding ascii code is a symbol char, and 0
  * if not. The upper characters are also considered symbol
  * chars and are then checked for utf-8 compliance. */
 static const uint32_t symchars[8] = {
@@ -106,7 +106,8 @@ struct JanetParseState {
     int32_t counter;
     int32_t argn;
     int flags;
-    size_t start;
+    size_t line;
+    size_t column;
     Consumer consumer;
 };
 
@@ -153,7 +154,8 @@ static void pushstate(JanetParser *p, Consumer consumer, int flags) {
     s.argn = 0;
     s.flags = flags;
     s.consumer = consumer;
-    s.start = p->offset;
+    s.line = p->line;
+    s.column = p->column;
     _pushstate(p, s);
 }
 
@@ -164,8 +166,8 @@ static void popstate(JanetParser *p, Janet val) {
         if (newtop->flags & PFLAG_CONTAINER) {
             /* Source mapping info */
             if (janet_checktype(val, JANET_TUPLE)) {
-                janet_tuple_sm_start(janet_unwrap_tuple(val)) = (int32_t) top.start;
-                janet_tuple_sm_end(janet_unwrap_tuple(val)) = (int32_t) p->offset;
+                janet_tuple_sm_line(janet_unwrap_tuple(val)) = (int32_t) top.line;
+                janet_tuple_sm_column(janet_unwrap_tuple(val)) = (int32_t) top.column;
             }
             newtop->argn++;
             /* Keep track of number of values in the root state */
@@ -184,8 +186,8 @@ static void popstate(JanetParser *p, Janet val) {
             t[0] = janet_csymbolv(which);
             t[1] = val;
             /* Quote source mapping info */
-            janet_tuple_sm_start(t) = (int32_t) newtop->start;
-            janet_tuple_sm_end(t) = (int32_t) p->offset;
+            janet_tuple_sm_line(t) = (int32_t) newtop->line;
+            janet_tuple_sm_column(t) = (int32_t) newtop->column;
             val = janet_wrap_tuple(janet_tuple_end(t));
         } else {
             return;
@@ -231,7 +233,7 @@ static int escapeh(JanetParser *p, JanetParseState *state, uint8_t c) {
         p->error = "invalid hex digit in hex escape";
         return 1;
     }
-    state->argn = (state->argn << 4) + digit;;
+    state->argn = (state->argn << 4) + digit;
     state->counter--;
     if (!state->counter) {
         push_buf(p, (state->argn & 0xFF));
@@ -327,6 +329,12 @@ static int tokenchar(JanetParser *p, JanetParseState *state, uint8_t c) {
     int start_dig = p->buf[0] >= '0' && p->buf[0] <= '9';
     int start_num = start_dig || p->buf[0] == '-' || p->buf[0] == '+' || p->buf[0] == '.';
     if (p->buf[0] == ':') {
+        /* Don't do full utf-8 check unless we have seen non ascii characters. */
+        int valid = (!state->argn) || valid_utf8(p->buf + 1, blen - 1);
+        if (!valid) {
+            p->error = "invalid utf-8 in keyword";
+            return 0;
+        }
         ret = janet_keywordv(p->buf + 1, blen - 1);
     } else if (start_num && !janet_scan_number(p->buf, blen, &numval)) {
         ret = janet_wrap_number(numval);
@@ -336,7 +344,7 @@ static int tokenchar(JanetParser *p, JanetParseState *state, uint8_t c) {
         ret = janet_wrap_false();
     } else if (!check_str_const("true", p->buf, blen)) {
         ret = janet_wrap_true();
-    } else if (p->buf) {
+    } else {
         if (start_dig) {
             p->error = "symbol literal cannot start with a digit";
             return 0;
@@ -349,9 +357,6 @@ static int tokenchar(JanetParser *p, JanetParseState *state, uint8_t c) {
             }
             ret = janet_symbolv(p->buf, blen);
         }
-    } else {
-        p->error = "empty symbol invalid";
-        return 0;
     }
     p->bufcount = 0;
     popstate(p, ret);
@@ -562,7 +567,16 @@ static void janet_parser_checkdead(JanetParser *parser) {
 void janet_parser_consume(JanetParser *parser, uint8_t c) {
     int consumed = 0;
     janet_parser_checkdead(parser);
-    parser->offset++;
+    if (c == '\r') {
+        parser->line++;
+        parser->column = 0;
+    } else if (c == '\n') {
+        parser->column = 0;
+        if (parser->lookback != '\r')
+            parser->line++;
+    } else {
+        parser->column++;
+    }
     while (!consumed && !parser->error) {
         JanetParseState *state = parser->states + parser->statecount - 1;
         consumed = state->consumer(parser, state, c);
@@ -572,11 +586,14 @@ void janet_parser_consume(JanetParser *parser, uint8_t c) {
 
 void janet_parser_eof(JanetParser *parser) {
     janet_parser_checkdead(parser);
+    size_t oldcolumn = parser->column;
+    size_t oldline = parser->line;
     janet_parser_consume(parser, '\n');
     if (parser->statecount > 1) {
         parser->error = "unexpected end of source";
     }
-    parser->offset--;
+    parser->line = oldline;
+    parser->column = oldcolumn;
     parser->flag = 1;
 }
 
@@ -630,7 +647,8 @@ void janet_parser_init(JanetParser *parser) {
     parser->statecap = 0;
     parser->error = NULL;
     parser->lookback = -1;
-    parser->offset = 0;
+    parser->line = 1;
+    parser->column = 0;
     parser->pending = 0;
     parser->flag = 0;
 
@@ -648,7 +666,8 @@ void janet_parser_clone(const JanetParser *src, JanetParser *dest) {
     dest->flag = src->flag;
     dest->pending = src->pending;
     dest->lookback = src->lookback;
-    dest->offset = src->offset;
+    dest->line = src->line;
+    dest->column = src->column;
     dest->error = src->error;
 
     /* Keep counts */
@@ -711,7 +730,7 @@ static int parsergc(void *p, size_t size) {
     return 0;
 }
 
-static Janet parserget(void *p, Janet key);
+static int parserget(void *p, Janet key, Janet *out);
 
 static JanetAbstractType janet_parse_parsertype = {
     "core/parser",
@@ -771,7 +790,7 @@ static Janet cfun_parse_insert(int32_t argc, Janet *argv) {
     JanetParseState *s = p->states + p->statecount - 1;
     if (s->consumer == tokenchar) {
         janet_parser_consume(p, ' ');
-        p->offset--;
+        p->column--;
         s = p->states + p->statecount - 1;
     }
     if (s->flags & PFLAG_CONTAINER) {
@@ -855,15 +874,12 @@ static Janet cfun_parse_flush(int32_t argc, Janet *argv) {
 }
 
 static Janet cfun_parse_where(int32_t argc, Janet *argv) {
-    janet_arity(argc, 1, 2);
+    janet_fixarity(argc, 1);
     JanetParser *p = janet_getabstract(argv, 0, &janet_parse_parsertype);
-    if (argc > 1) {
-        int32_t offset = janet_getinteger(argv, 1);
-        p->offset = offset;
-        return argv[0];
-    } else {
-        return janet_wrap_integer(p->offset);
-    }
+    Janet *tup = janet_tuple_begin(2);
+    tup[0] = janet_wrap_integer(p->line);
+    tup[1] = janet_wrap_integer(p->column);
+    return janet_wrap_tuple(janet_tuple_end(tup));
 }
 
 static Janet janet_wrap_parse_state(JanetParseState *s, Janet *args,
@@ -928,8 +944,8 @@ static Janet janet_wrap_parse_state(JanetParseState *s, Janet *args,
         janet_table_put(state, janet_ckeywordv("buffer"), janet_wrap_string(buffer));
     }
 
-    janet_table_put(state, janet_ckeywordv("start"),
-                    janet_wrap_integer(s->start));
+    janet_table_put(state, janet_ckeywordv("line"), janet_wrap_integer(s->line));
+    janet_table_put(state, janet_ckeywordv("column"), janet_wrap_integer(s->column));
     return janet_wrap_table(state);
 }
 
@@ -1039,10 +1055,10 @@ static const JanetMethod parser_methods[] = {
     {NULL, NULL}
 };
 
-static Janet parserget(void *p, Janet key) {
+static int parserget(void *p, Janet key, Janet *out) {
     (void) p;
-    if (!janet_checktype(key, JANET_KEYWORD)) janet_panicf("expected keyword method");
-    return janet_getmethod(janet_unwrap_keyword(key), parser_methods);
+    if (!janet_checktype(key, JANET_KEYWORD)) return 0;
+    return janet_getmethod(janet_unwrap_keyword(key), parser_methods, out);
 }
 
 static const JanetReg parse_cfuns[] = {
@@ -1121,10 +1137,8 @@ static const JanetReg parse_cfuns[] = {
     },
     {
         "parser/where", cfun_parse_where,
-        JDOC("(parser/where parser &opt offset)\n\n"
-             "Returns the current line number and column number of the parser's location "
-             "in the byte stream as an index, counted from 0. "
-             "If offset is supplied, then the byte offset is updated to that new value.")
+        JDOC("(parser/where parser)\n\n"
+             "Returns the current line number and column of the parser's internal state.")
     },
     {
         "parser/eof", cfun_parse_eof,

src/core/peg.c

@@ -59,6 +59,7 @@ typedef enum {
     RULE_MATCHTIME,    /* [rule, constant, tag] */
     RULE_ERROR,        /* [rule] */
     RULE_DROP,         /* [rule] */
+    RULE_BACKMATCH,    /* [tag] */
 } Opcode;
 
 /* Hold captured patterns and match state */
@@ -417,6 +418,24 @@ tail:
             }
             return NULL;
         }
+
+        case RULE_BACKMATCH: {
+            uint32_t search = rule[1];
+            for (int32_t i = s->tags->count - 1; i >= 0; i--) {
+                if (s->tags->data[i] == search) {
+                    Janet capture = s->captures->data[i];
+                    if (!janet_checktype(capture, JANET_STRING))
+                        return NULL;
+                    const uint8_t *bytes = janet_unwrap_string(capture);
+                    int32_t len = janet_string_length(bytes);
+                    if (text + len > s->text_end)
+                        return NULL;
+                    return memcmp(text, bytes, len) ? NULL : text + len;
+                }
+            }
+            return NULL;
+        }
+
     }
 }
 
@@ -426,7 +445,7 @@ tail:
 
 typedef struct {
     JanetTable *grammar;
-    JanetTable *memoized;
+    JanetTable *default_grammar;
     JanetTable *tags;
     Janet *constants;
     uint32_t *bytecode;
@@ -754,12 +773,20 @@ static void spec_reference(Builder *b, int32_t argc, const Janet *argv) {
     emit_2(r, RULE_GETTAG, search, tag);
 }
 
-static void spec_position(Builder *b, int32_t argc, const Janet *argv) {
+static void spec_tag1(Builder *b, int32_t argc, const Janet *argv, uint32_t op) {
     peg_arity(b, argc, 0, 1);
     Reserve r = reserve(b, 2);
     uint32_t tag = (argc) ? emit_tag(b, argv[0]) : 0;
     (void) argv;
-    emit_1(r, RULE_POSITION, tag);
+    emit_1(r, op, tag);
+}
+
+static void spec_position(Builder *b, int32_t argc, const Janet *argv) {
+    spec_tag1(b, argc, argv, RULE_POSITION);
+}
+
+static void spec_backmatch(Builder *b, int32_t argc, const Janet *argv) {
+    spec_tag1(b, argc, argv, RULE_BACKMATCH);
 }
 
 static void spec_argument(Builder *b, int32_t argc, const Janet *argv) {
@@ -824,6 +851,7 @@ static const SpecialPair peg_specials[] = {
     {"argument", spec_argument},
     {"at-least", spec_atleast},
     {"at-most", spec_atmost},
+    {"backmatch", spec_backmatch},
     {"backref", spec_reference},
     {"between", spec_between},
     {"capture", spec_capture},
@@ -850,27 +878,59 @@ static const SpecialPair peg_specials[] = {
 /* Compile a janet value into a rule and return the rule index. */
 static uint32_t peg_compile1(Builder *b, Janet peg) {
 
-    /* Check for already compiled rules */
-    Janet check = janet_table_get(b->memoized, peg);
-    if (!janet_checktype(check, JANET_NIL)) {
-        uint32_t rule = (uint32_t) janet_unwrap_number(check);
-        return rule;
-    }
-
     /* Keep track of the form being compiled for error purposes */
     Janet old_form = b->form;
+    JanetTable *old_grammar = b->grammar;
     b->form = peg;
 
-    /* Check depth */
-    if (b->depth-- == 0) {
-        peg_panic(b, "peg grammar recursed too deeply");
+    /* Resolve keyword references */
+    int i = JANET_RECURSION_GUARD;
+    JanetTable *grammar = old_grammar;
+    for (; i > 0 && janet_checktype(peg, JANET_KEYWORD); --i) {
+        Janet nextPeg = janet_table_get_ex(grammar, peg, &grammar);
+        if (!grammar || janet_checktype(nextPeg, JANET_NIL)) {
+            nextPeg = janet_table_get(b->default_grammar, peg);
+            if (janet_checktype(nextPeg, JANET_NIL)) {
+                peg_panic(b, "unknown rule");
+            }
+        }
+        peg = nextPeg;
+        b->form = peg;
+        b->grammar = grammar;
     }
+    if (i == 0)
+        peg_panic(b, "reference chain too deep");
+
+    /* Check cache - for tuples we check only the local cache, as
+     * in a different grammar, the same tuple can compile to a different
+     * rule - for example, (+ :a :b) depends on whatever :a and :b are bound to. */
+    Janet check = janet_checktype(peg, JANET_TUPLE)
+                  ? janet_table_rawget(grammar, peg)
+                  : janet_table_get(grammar, peg);
+    if (!janet_checktype(check, JANET_NIL)) {
+        b->form = old_form;
+        b->grammar = old_grammar;
+        return (uint32_t) janet_unwrap_number(check);
+    }
+
+    /* Check depth */
+    if (b->depth-- == 0)
+        peg_panic(b, "peg grammar recursed too deeply");
 
     /* The final rule to return */
     uint32_t rule = janet_v_count(b->bytecode);
-    if (!janet_checktype(peg, JANET_KEYWORD) &&
-            !janet_checktype(peg, JANET_STRUCT)) {
-        janet_table_put(b->memoized, peg, janet_wrap_number(rule));
+
+    /* Add to cache. Do not cache structs, as we don't yet know
+     * what rule they will return! We can just as effectively cache
+     * the structs main rule. */
+    if (!janet_checktype(peg, JANET_STRUCT)) {
+        JanetTable *which_grammar = grammar;
+        /* If we are a primitive pattern, add to the global cache (root grammar table) */
+        if (!janet_checktype(peg, JANET_TUPLE)) {
+            while (which_grammar->proto)
+                which_grammar = which_grammar->proto;
+        }
+        janet_table_put(which_grammar, peg, janet_wrap_number(rule));
     }
 
     switch (janet_type(peg)) {
@@ -893,22 +953,22 @@ static uint32_t peg_compile1(Builder *b, Janet peg) {
             emit_bytes(b, RULE_LITERAL, len, str);
             break;
         }
-        case JANET_KEYWORD: {
-            Janet check = janet_table_get(b->grammar, peg);
-            if (janet_checktype(check, JANET_NIL))
-                peg_panic(b, "unknown rule");
-            rule = peg_compile1(b, check);
-            break;
-        }
         case JANET_STRUCT: {
-            JanetTable *grammar = janet_struct_to_table(janet_unwrap_struct(peg));
-            grammar->proto = b->grammar;
-            b->grammar = grammar;
-            Janet main_rule = janet_table_get(grammar, janet_ckeywordv("main"));
+            /* Build grammar table */
+            const JanetKV *st = janet_unwrap_struct(peg);
+            JanetTable *new_grammar = janet_table(2 * janet_struct_capacity(st));
+            for (int32_t i = 0; i < janet_struct_capacity(st); i++) {
+                if (janet_checktype(st[i].key, JANET_KEYWORD)) {
+                    janet_table_put(new_grammar, st[i].key, st[i].value);
+                }
+            }
+            new_grammar->proto = grammar;
+            b->grammar = grammar = new_grammar;
+            /* Run the main rule */
+            Janet main_rule = janet_table_rawget(grammar, janet_ckeywordv("main"));
             if (janet_checktype(main_rule, JANET_NIL))
                 peg_panic(b, "grammar requires :main rule");
             rule = peg_compile1(b, main_rule);
-            b->grammar = grammar->proto;
             break;
         }
         case JANET_TUPLE: {
@@ -935,6 +995,7 @@ static uint32_t peg_compile1(Builder *b, Janet peg) {
     /* Increase depth again */
     b->depth++;
     b->form = old_form;
+    b->grammar = old_grammar;
     return rule;
 }
 
@@ -962,6 +1023,7 @@ static void peg_marshal(void *p, JanetMarshalContext *ctx) {
     Peg *peg = (Peg *)p;
     janet_marshal_size(ctx, peg->bytecode_len);
     janet_marshal_int(ctx, (int32_t)peg->num_constants);
+    janet_marshal_abstract(ctx, p);
     for (size_t i = 0; i < peg->bytecode_len; i++)
         janet_marshal_int(ctx, (int32_t) peg->bytecode[i]);
     for (uint32_t j = 0; j < peg->num_constants; j++)
@@ -975,25 +1037,28 @@ static size_t size_padded(size_t offset, size_t size) {
     return x - (x % size);
 }
 
-static void peg_unmarshal(void *p, JanetMarshalContext *ctx) {
-    char *mem = p;
-    Peg *peg = (Peg *)p;
-    peg->bytecode_len = janet_unmarshal_size(ctx);
-    peg->num_constants = (uint32_t) janet_unmarshal_int(ctx);
+static void *peg_unmarshal(JanetMarshalContext *ctx) {
+    size_t bytecode_len = janet_unmarshal_size(ctx);
+    uint32_t num_constants = (uint32_t) janet_unmarshal_int(ctx);
 
     /* Calculate offsets. Should match those in make_peg */
     size_t bytecode_start = size_padded(sizeof(Peg), sizeof(uint32_t));
-    size_t bytecode_size = peg->bytecode_len * sizeof(uint32_t);
+    size_t bytecode_size = bytecode_len * sizeof(uint32_t);
     size_t constants_start = size_padded(bytecode_start + bytecode_size, sizeof(Janet));
+    size_t total_size = constants_start + sizeof(Janet) * num_constants;
+
+    /* DOS prevention? I.E. we could read bytecode and constants before
+     * hand so we don't allocated a ton of memory on bad, short input */
+
+    /* Allocate PEG */
+    char *mem = janet_unmarshal_abstract(ctx, total_size);
+    Peg *peg = (Peg *)mem;
     uint32_t *bytecode = (uint32_t *)(mem + bytecode_start);
     Janet *constants = (Janet *)(mem + constants_start);
     peg->bytecode = NULL;
     peg->constants = NULL;
-
-    /* Ensure not too large */
-    if (constants_start + sizeof(Janet) * peg->num_constants > janet_abstract_size(p)) {
-        janet_panic("size mismatch");
-    }
+    peg->bytecode_len = bytecode_len;
+    peg->num_constants = num_constants;
 
     for (size_t i = 0; i < peg->bytecode_len; i++)
         bytecode[i] = (uint32_t) janet_unmarshal_int(ctx);
@@ -1029,6 +1094,7 @@ static void peg_unmarshal(void *p, JanetMarshalContext *ctx) {
             case RULE_NOTNCHAR:
             case RULE_RANGE:
             case RULE_POSITION:
+            case RULE_BACKMATCH:
                 /* [1 word] */
                 i += 2;
                 break;
@@ -1120,18 +1186,20 @@ static void peg_unmarshal(void *p, JanetMarshalContext *ctx) {
     peg->bytecode = bytecode;
     peg->constants = constants;
     free(op_flags);
-    return;
+    return peg;
 
 bad:
     free(op_flags);
     janet_panic("invalid peg bytecode");
 }
 
+static int cfun_peg_getter(JanetAbstract a, Janet key, Janet *out);
+
 static const JanetAbstractType peg_type = {
     "core/peg",
     NULL,
     peg_mark,
-    NULL,
+    cfun_peg_getter,
     NULL,
     peg_marshal,
     peg_unmarshal,
@@ -1160,7 +1228,7 @@ static Peg *make_peg(Builder *b) {
 static Peg *compile_peg(Janet x) {
     Builder builder;
     builder.grammar = janet_table(0);
-    builder.memoized = janet_table(0);
+    builder.default_grammar = janet_get_core_table("default-peg-grammar");
     builder.tags = janet_table(0);
     builder.constants = NULL;
     builder.bytecode = NULL;
@@ -1217,6 +1285,15 @@ static Janet cfun_peg_match(int32_t argc, Janet *argv) {
     return result ? janet_wrap_array(s.captures) : janet_wrap_nil();
 }
 
+static int cfun_peg_getter(JanetAbstract a, Janet key, Janet *out) {
+    (void) a;
+    if (janet_keyeq(key, "match")) {
+        *out = janet_wrap_cfunction(cfun_peg_match);
+        return 1;
+    }
+    return 0;
+}
+
 static const JanetReg peg_cfuns[] = {
     {
         "peg/compile", cfun_peg_compile,

src/core/pp.c

@@ -27,17 +27,23 @@
 #include <janet.h>
 #include "util.h"
 #include "state.h"
+#include <math.h>
 #endif
 
 /* Implements a pretty printer for Janet. The pretty printer
- * is farily simple and not that flexible, but fast. */
+ * is simple and not that flexible, but fast. */
 
 /* Temporary buffer size */
 #define BUFSIZE 64
 
 static void number_to_string_b(JanetBuffer *buffer, double x) {
     janet_buffer_ensure(buffer, buffer->count + BUFSIZE, 2);
-    int count = snprintf((char *) buffer->data + buffer->count, BUFSIZE, "%g", x);
+    /* Use int32_t range for valid integers because that is the
+     * range most integer-expecting functions in the C api use. */
+    const char *fmt = (x == floor(x) &&
+                       x <= ((double) INT32_MAX) &&
+                       x >= ((double) INT32_MIN)) ? "%.0f" : "%g";
+    int count = snprintf((char *) buffer->data + buffer->count, BUFSIZE, fmt, x);
     buffer->count += count;
 }
 
@@ -253,11 +259,13 @@ void janet_to_string_b(JanetBuffer *buffer, Janet x) {
         default:
             janet_description_b(buffer, x);
             break;
-        case JANET_BUFFER:
-            janet_buffer_push_bytes(buffer,
-                                    janet_unwrap_buffer(x)->data,
-                                    janet_unwrap_buffer(x)->count);
+        case JANET_BUFFER: {
+            JanetBuffer *to = janet_unwrap_buffer(x);
+            /* Prevent resizing buffer while appending */
+            if (buffer == to) janet_buffer_extra(buffer, to->count);
+            janet_buffer_push_bytes(buffer, to->data, to->count);
             break;
+        }
         case JANET_STRING:
         case JANET_SYMBOL:
         case JANET_KEYWORD:
@@ -310,7 +318,7 @@ struct pretty {
 
 static void print_newline(struct pretty *S, int just_a_space) {
     int i;
-    if (just_a_space) {
+    if (just_a_space || (S->flags & JANET_PRETTY_ONELINE)) {
         janet_buffer_push_u8(S->buffer, ' ');
         return;
     }
@@ -406,7 +414,7 @@ static void janet_pretty_one(struct pretty *S, Janet x, int is_dict_value) {
             if (S->depth == 0) {
                 janet_buffer_push_cstring(S->buffer, "...");
             } else {
-                if (!isarray && len >= JANET_PRETTY_IND_ONELINE)
+                if (!isarray && !(S->flags & JANET_PRETTY_ONELINE) && len >= JANET_PRETTY_IND_ONELINE)
                     janet_buffer_push_u8(S->buffer, ' ');
                 if (is_dict_value && len >= JANET_PRETTY_IND_ONELINE) print_newline(S, 0);
                 for (i = 0; i < len; i++) {
@@ -725,12 +733,20 @@ void janet_buffer_format(
                     janet_description_b(b, argv[arg]);
                     break;
                 }
+                case 'Q':
+                case 'q':
                 case 'P':
                 case 'p': { /* janet pretty , precision = depth */
                     int depth = atoi(precision);
                     if (depth < 1)
                         depth = 4;
-                    janet_pretty_(b, depth, (strfrmt[-1] == 'P') ? JANET_PRETTY_COLOR : 0, argv[arg], startlen);
+                    char c = strfrmt[-1];
+                    int has_color = (c == 'P') || (c == 'Q');
+                    int has_oneline = (c == 'Q') || (c == 'q');
+                    int flags = 0;
+                    flags |= has_color ? JANET_PRETTY_COLOR : 0;
+                    flags |= has_oneline ? JANET_PRETTY_ONELINE : 0;
+                    janet_pretty_(b, depth, flags, argv[arg], startlen);
                     break;
                 }
                 default: {

src/core/run.c

@@ -28,7 +28,6 @@
 /* Run a string */
 int janet_dobytes(JanetTable *env, const uint8_t *bytes, int32_t len, const char *sourcePath, Janet *out) {
     JanetParser parser;
-    FILE *errf = janet_dynfile("err", stderr);
     int errflags = 0, done = 0;
     int32_t index = 0;
     Janet ret = janet_wrap_nil();
@@ -56,8 +55,13 @@ int janet_dobytes(JanetTable *env, const uint8_t *bytes, int32_t len, const char
                     done = 1;
                 }
             } else {
-                fprintf(errf, "compile error in %s: %s\n", sourcePath,
-                        (const char *)cres.error);
+                if (cres.macrofiber) {
+                    janet_eprintf("compile error in %s: ", sourcePath);
+                    janet_stacktrace(cres.macrofiber, janet_wrap_string(cres.error));
+                } else {
+                    janet_eprintf("compile error in %s: %s\n", sourcePath,
+                                  (const char *)cres.error);
+                }
                 errflags |= 0x02;
                 done = 1;
             }
@@ -70,8 +74,8 @@ int janet_dobytes(JanetTable *env, const uint8_t *bytes, int32_t len, const char
                 break;
             case JANET_PARSE_ERROR:
                 errflags |= 0x04;
-                fprintf(errf, "parse error in %s: %s\n",
-                        sourcePath, janet_parser_error(&parser));
+                janet_eprintf("parse error in %s: %s\n",
+                              sourcePath, janet_parser_error(&parser));
                 done = 1;
                 break;
             case JANET_PARSE_PENDING:

src/core/specials.c

@@ -55,7 +55,11 @@ static JanetSlot qq_slots(JanetFopts opts, JanetSlot *slots, int makeop) {
     return target;
 }
 
-static JanetSlot quasiquote(JanetFopts opts, Janet x) {
+static JanetSlot quasiquote(JanetFopts opts, Janet x, int depth, int level) {
+    if (depth == 0) {
+        janetc_cerror(opts.compiler, "quasiquote too deeply nested");
+        return janetc_cslot(janet_wrap_nil());
+    }
     JanetSlot *slots = NULL;
     switch (janet_type(x)) {
         default:
@@ -66,11 +70,18 @@ static JanetSlot quasiquote(JanetFopts opts, Janet x) {
             len = janet_tuple_length(tup);
             if (len > 1 && janet_checktype(tup[0], JANET_SYMBOL)) {
                 const uint8_t *head = janet_unwrap_symbol(tup[0]);
-                if (!janet_cstrcmp(head, "unquote"))
-                    return janetc_value(janetc_fopts_default(opts.compiler), tup[1]);
+                if (!janet_cstrcmp(head, "unquote")) {
+                    if (level == 0) {
+                        return janetc_value(janetc_fopts_default(opts.compiler), tup[1]);
+                    } else {
+                        level--;
+                    }
+                } else if (!janet_cstrcmp(head, "quasiquote")) {
+                    level++;
+                }
             }
             for (i = 0; i < len; i++)
-                janet_v_push(slots, quasiquote(opts, tup[i]));
+                janet_v_push(slots, quasiquote(opts, tup[i], depth - 1, level));
             return qq_slots(opts, slots, (janet_tuple_flag(tup) & JANET_TUPLE_FLAG_BRACKETCTOR)
                             ? JOP_MAKE_BRACKET_TUPLE
                             : JOP_MAKE_TUPLE);
@@ -79,7 +90,7 @@ static JanetSlot quasiquote(JanetFopts opts, Janet x) {
             int32_t i;
             JanetArray *array = janet_unwrap_array(x);
             for (i = 0; i < array->count; i++)
-                janet_v_push(slots, quasiquote(opts, array->data[i]));
+                janet_v_push(slots, quasiquote(opts, array->data[i], depth - 1, level));
             return qq_slots(opts, slots, JOP_MAKE_ARRAY);
         }
         case JANET_TABLE:
@@ -88,8 +99,8 @@ static JanetSlot quasiquote(JanetFopts opts, Janet x) {
             int32_t len, cap = 0;
             janet_dictionary_view(x, &kvs, &len, &cap);
             while ((kv = janet_dictionary_next(kvs, cap, kv))) {
-                JanetSlot key = quasiquote(opts, kv->key);
-                JanetSlot value =  quasiquote(opts, kv->value);
+                JanetSlot key = quasiquote(opts, kv->key, depth - 1, level);
+                JanetSlot value =  quasiquote(opts, kv->value, depth - 1, level);
                 key.flags &= ~JANET_SLOT_SPLICED;
                 value.flags &= ~JANET_SLOT_SPLICED;
                 janet_v_push(slots, key);
@@ -106,7 +117,7 @@ static JanetSlot janetc_quasiquote(JanetFopts opts, int32_t argn, const Janet *a
         janetc_cerror(opts.compiler, "expected 1 argument");
         return janetc_cslot(janet_wrap_nil());
     }
-    return quasiquote(opts, argv[0]);
+    return quasiquote(opts, argv[0], JANET_RECURSION_GUARD, 0);
 }
 
 static JanetSlot janetc_unquote(JanetFopts opts, int32_t argn, const Janet *argv) {
@@ -146,7 +157,7 @@ static int destructure(JanetCompiler *c,
                     janetc_emit_ssu(c, JOP_GET_INDEX, nextright, right, (uint8_t) i, 1);
                 } else {
                     JanetSlot k = janetc_cslot(janet_wrap_integer(i));
-                    janetc_emit_sss(c, JOP_GET, nextright, right, k, 1);
+                    janetc_emit_sss(c, JOP_IN, nextright, right, k, 1);
                 }
                 if (destructure(c, subval, nextright, leaf, attr))
                     janetc_freeslot(c, nextright);
@@ -162,7 +173,7 @@ static int destructure(JanetCompiler *c,
                 if (janet_checktype(kvs[i].key, JANET_NIL)) continue;
                 JanetSlot nextright = janetc_farslot(c);
                 JanetSlot k = janetc_value(janetc_fopts_default(c), kvs[i].key);
-                janetc_emit_sss(c, JOP_GET, nextright, right, k, 1);
+                janetc_emit_sss(c, JOP_IN, nextright, right, k, 1);
                 if (destructure(c, kvs[i].value, nextright, leaf, attr))
                     janetc_freeslot(c, nextright);
             }
@@ -175,8 +186,8 @@ static int destructure(JanetCompiler *c,
 static const Janet *janetc_make_sourcemap(JanetCompiler *c) {
     Janet *tup = janet_tuple_begin(3);
     tup[0] = c->source ? janet_wrap_string(c->source) : janet_wrap_nil();
-    tup[1] = janet_wrap_integer(c->current_mapping.start);
-    tup[2] = janet_wrap_integer(c->current_mapping.end);
+    tup[1] = janet_wrap_integer(c->current_mapping.line);
+    tup[2] = janet_wrap_integer(c->current_mapping.column);
     return janet_tuple_end(tup);
 }
 
@@ -602,6 +613,7 @@ static JanetSlot janetc_while(JanetFopts opts, int32_t argn, const Janet *argv)
         int32_t tempself = janetc_regalloc_temp(&tempscope.ra, JANETC_REGTEMP_0);
         janetc_emit(c, JOP_LOAD_SELF | (tempself << 8));
         janetc_emit(c, JOP_TAILCALL | (tempself << 8));
+        janetc_regalloc_freetemp(&c->scope->ra, tempself, JANETC_REGTEMP_0);
         /* Compile function */
         JanetFuncDef *def = janetc_pop_funcdef(c);
         def->name = janet_cstring("_while");
@@ -610,7 +622,7 @@ static JanetSlot janetc_while(JanetFopts opts, int32_t argn, const Janet *argv)
         int32_t cloreg = janetc_regalloc_temp(&c->scope->ra, JANETC_REGTEMP_0);
         janetc_emit(c, JOP_CLOSURE | (cloreg << 8) | (defindex << 16));
         janetc_emit(c, JOP_CALL | (cloreg << 8) | (cloreg << 16));
-        janetc_regalloc_free(&c->scope->ra, cloreg);
+        janetc_regalloc_freetemp(&c->scope->ra, cloreg, JANETC_REGTEMP_0);
         c->scope->flags |= JANET_SCOPE_CLOSURE;
         return janetc_cslot(janet_wrap_nil());
     }
@@ -660,8 +672,8 @@ static JanetSlot janetc_fn(JanetFopts opts, int32_t argn, const Janet *argv) {
     c->scope->flags |= JANET_SCOPE_CLOSURE;
     janetc_scope(&fnscope, c, JANET_SCOPE_FUNCTION, "function");
 
-    if (argn < 2) {
-        errmsg = "expected at least 2 arguments to function literal";
+    if (argn == 0) {
+        errmsg = "expected at least 1 argument to function literal";
         goto error;
     }
 

src/core/state.h

@@ -32,6 +32,9 @@
  * be in it. However, thread local global variables for interpreter
  * state should allow easy multi-threading. */
 
+/* Cache the core environment */
+extern JANET_THREAD_LOCAL JanetTable *janet_vm_core_env;
+
 /* How many VM stacks have been entered */
 extern JANET_THREAD_LOCAL int janet_vm_stackn;
 
@@ -70,4 +73,10 @@ extern JANET_THREAD_LOCAL void **janet_scratch_mem;
 extern JANET_THREAD_LOCAL size_t janet_scratch_cap;
 extern JANET_THREAD_LOCAL size_t janet_scratch_len;
 
+/* Setup / teardown */
+#ifdef JANET_THREADS
+void janet_threads_init(void);
+void janet_threads_deinit(void);
+#endif
+
 #endif /* JANET_STATE_H_defined */

src/core/string.c

@@ -104,6 +104,9 @@ static void kmp_init(
     struct kmp_state *s,
     const uint8_t *text, int32_t textlen,
     const uint8_t *pat, int32_t patlen) {
+    if (patlen == 0) {
+        janet_panic("expected non-empty pattern");
+    }
     int32_t *lookup = calloc(patlen, sizeof(int32_t));
     if (!lookup) {
         JANET_OUT_OF_MEMORY;
@@ -167,8 +170,8 @@ static int32_t kmp_next(struct kmp_state *state) {
 /* CFuns */
 
 static Janet cfun_string_slice(int32_t argc, Janet *argv) {
-    JanetRange range = janet_getslice(argc, argv);
     JanetByteView view = janet_getbytes(argv, 0);
+    JanetRange range = janet_getslice(argc, argv);
     return janet_stringv(view.bytes + range.start, range.end - range.start);
 }
 
@@ -378,15 +381,13 @@ static Janet cfun_string_split(int32_t argc, Janet *argv) {
     }
     findsetup(argc, argv, &state, 1);
     array = janet_array(0);
-    while ((result = kmp_next(&state)) >= 0 && limit--) {
+    while ((result = kmp_next(&state)) >= 0 && --limit) {
         const uint8_t *slice = janet_string(state.text + lastindex, result - lastindex);
         janet_array_push(array, janet_wrap_string(slice));
         lastindex = result + state.patlen;
     }
-    {
-        const uint8_t *slice = janet_string(state.text + lastindex, state.textlen - lastindex);
-        janet_array_push(array, janet_wrap_string(slice));
-    }
+    const uint8_t *slice = janet_string(state.text + lastindex, state.textlen - lastindex);
+    janet_array_push(array, janet_wrap_string(slice));
     kmp_deinit(&state);
     return janet_wrap_array(array);
 }
@@ -403,7 +404,6 @@ static Janet cfun_string_checkset(int32_t argc, Janet *argv) {
         bitset[index] |= mask;
     }
     /* Check set */
-    if (str.len == 0) return janet_wrap_false();
     for (int32_t i = 0; i < str.len; i++) {
         int index = str.bytes[i] >> 5;
         uint32_t mask = 1 << (str.bytes[i] & 0x1F);
@@ -499,6 +499,8 @@ static Janet cfun_string_trim(int32_t argc, Janet *argv) {
     trim_help_args(argc, argv, &str, &set);
     int32_t left_edge = trim_help_leftedge(str, set);
     int32_t right_edge = trim_help_rightedge(str, set);
+    if (right_edge < left_edge)
+        return janet_stringv(NULL, 0);
     return janet_stringv(str.bytes + left_edge, right_edge - left_edge);
 }
 
@@ -523,7 +525,8 @@ static const JanetReg string_cfuns[] = {
              "Returns a substring from a byte sequence. The substring is from "
              "index start inclusive to index end exclusive. All indexing "
              "is from 0. 'start' and 'end' can also be negative to indicate indexing "
-             "from the end of the string.")
+             "from the end of the string. Note that index -1 is synonymous with "
+             "index (length bytes) to allow a full negative slice range. ")
     },
     {
         "string/repeat", cfun_string_repeat,
@@ -600,16 +603,19 @@ static const JanetReg string_cfuns[] = {
     },
     {
         "string/split", cfun_string_split,
-        JDOC("(string/split delim str)\n\n"
+        JDOC("(string/split delim str &opt start limit)\n\n"
              "Splits a string str with delimiter delim and returns an array of "
              "substrings. The substrings will not contain the delimiter delim. If delim "
-             "is not found, the returned array will have one element.")
+             "is not found, the returned array will have one element. Will start searching "
+             "for delim at the index start (if provided), and return up to a maximum "
+             "of limit results (if provided).")
     },
     {
         "string/check-set", cfun_string_checkset,
         JDOC("(string/check-set set str)\n\n"
-             "Checks if any of the bytes in the string set appear in the string str. "
-             "Returns true if some bytes in set do appear in str, false if no bytes do.")
+             "Checks that the string str only contains bytes that appear in the string set. "
+             "Returns true if all bytes in str appear in set, false if some bytes in str do "
+             "not appear in set.")
     },
     {
         "string/join", cfun_string_join,

src/core/strtod.c

@@ -196,7 +196,7 @@ static double bignat_extract(struct BigNat *mant, int32_t exponent2) {
 
 /* Read in a mantissa and exponent of a certain base, and give
  * back the double value. Should properly handle 0s, infinities, and
- * denormalized numbers. (When the exponent values are too large) */
+ * denormalized numbers. (When the exponent values are too large or small) */
 static double convert(
     int negative,
     struct BigNat *mant,
@@ -205,11 +205,20 @@ static double convert(
 
     int32_t exponent2 = 0;
 
-    /* Short circuit zero and huge numbers */
+    /* Approximate exponent in base 2 of mant and exponent. This should get us a good estimate of the final size of the
+     * number, within * 2^32 or so. */
+    int32_t mant_exp2_approx = mant->n * 32 + 16;
+    int32_t exp_exp2_approx = (int32_t)(floor(log2(base) * exponent));
+    int32_t exp2_approx = mant_exp2_approx + exp_exp2_approx;
+
+    /* Short circuit zero, huge, and small numbers. We use the exponent range of valid IEEE754 doubles (-1022, 1023)
+     * with a healthy buffer to allow for inaccuracies in the approximation and denormailzed numbers. */
     if (mant->n == 0 && mant->first_digit == 0)
         return negative ? -0.0 : 0.0;
-    if (exponent > 1023)
+    if (exp2_approx > 1176)
         return negative ? -INFINITY : INFINITY;
+    if (exp2_approx < -1175)
+        return negative ? -0.0 : 0.0;
 
     /* Final value is X = mant * base ^ exponent * 2 ^ exponent2
      * Get exponent to zero while holding X constant. */
@@ -326,7 +335,7 @@ int janet_scan_number(
     /* Read exponent */
     if (str < end && foundexp) {
         int eneg = 0;
-        int ee = 0;
+        int32_t ee = 0;
         seenadigit = 0;
         str++;
         if (str >= end) goto error;
@@ -341,10 +350,12 @@ int janet_scan_number(
             str++;
             seenadigit = 1;
         }
-        while (str < end && ee < (INT32_MAX / 40)) {
+        while (str < end) {
             int digit = digit_lookup[*str & 0x7F];
             if (*str > 127 || digit >= base) goto error;
-            ee = base * ee + digit;
+            if (ee < (INT32_MAX / 40)) {
+                ee = base * ee + digit;
+            }
             str++;
             seenadigit = 1;
         }

src/core/table.c

@@ -137,6 +137,27 @@ Janet janet_table_get(JanetTable *t, Janet key) {
     return janet_wrap_nil();
 }
 
+/* Get a value out of the table, and record which prototype it was from. */
+Janet janet_table_get_ex(JanetTable *t, Janet key, JanetTable **which) {
+    JanetKV *bucket = janet_table_find(t, key);
+    if (NULL != bucket && !janet_checktype(bucket->key, JANET_NIL)) {
+        *which = t;
+        return bucket->value;
+    }
+    /* Check prototypes */
+    {
+        int i;
+        for (i = JANET_MAX_PROTO_DEPTH, t = t->proto; t && i; t = t->proto, --i) {
+            bucket = janet_table_find(t, key);
+            if (NULL != bucket && !janet_checktype(bucket->key, JANET_NIL)) {
+                *which = t;
+                return bucket->value;
+            }
+        }
+    }
+    return janet_wrap_nil();
+}
+
 /* Get a value out of the table. Don't check prototype tables. */
 Janet janet_table_rawget(JanetTable *t, Janet key) {
     JanetKV *bucket = janet_table_find(t, key);

src/core/thread.c

@@ -0,0 +1,650 @@
+/*
+* Copyright (c) 2019 Calvin Rose
+*
+* Permission is hereby granted, free of charge, to any person obtaining a copy
+* of this software and associated documentation files (the "Software"), to
+* deal in the Software without restriction, including without limitation the
+* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+* sell copies of the Software, and to permit persons to whom the Software is
+* furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included in
+* all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+* IN THE SOFTWARE.
+*/
+
+#ifndef JANET_AMALG
+#include <janet.h>
+#include "gc.h"
+#include "util.h"
+#include "state.h"
+#endif
+
+#ifdef JANET_THREADS
+
+#include <math.h>
+#ifdef JANET_WINDOWS
+#include <windows.h>
+#else
+#include <setjmp.h>
+#include <time.h>
+#include <pthread.h>
+#endif
+
+/* typedefed in janet.h */
+struct JanetMailbox {
+
+    /* Synchronization */
+#ifdef JANET_WINDOWS
+    CRITICAL_SECTION lock;
+    CONDITION_VARIABLE cond;
+#else
+    pthread_mutex_t lock;
+    pthread_cond_t cond;
+#endif
+
+    /* Receiving messages - (only by owner thread)  */
+    JanetTable *decode;
+
+    /* Setup procedure - requires a parent mailbox
+     * to receive thunk from */
+    JanetMailbox *parent;
+
+    /* Memory management - reference counting */
+    int refCount;
+    int closed;
+
+    /* Store messages */
+    uint16_t messageCapacity;
+    uint16_t messageCount;
+    uint16_t messageFirst;
+    uint16_t messageNext;
+
+    /* Buffers to store messages. These buffers are manually allocated, so
+     * are not owned by any thread's GC. */
+    JanetBuffer messages[];
+};
+
+static JANET_THREAD_LOCAL JanetMailbox *janet_vm_mailbox = NULL;
+static JANET_THREAD_LOCAL JanetThread *janet_vm_thread_current = NULL;
+
+static JanetMailbox *janet_mailbox_create(JanetMailbox *parent, int refCount, uint16_t capacity) {
+    JanetMailbox *mailbox = malloc(sizeof(JanetMailbox) + sizeof(JanetBuffer) * capacity);
+    if (NULL == mailbox) {
+        JANET_OUT_OF_MEMORY;
+    }
+#ifdef JANET_WINDOWS
+    InitializeCriticalSection(&mailbox->lock);
+    InitializeConditionVariable(&mailbox->cond);
+#else
+    pthread_mutex_init(&mailbox->lock, NULL);
+    pthread_cond_init(&mailbox->cond, NULL);
+#endif
+    mailbox->refCount = refCount;
+    mailbox->closed = 0;
+    mailbox->parent = parent;
+    mailbox->messageCount = 0;
+    mailbox->messageCapacity = capacity;
+    mailbox->messageFirst = 0;
+    mailbox->messageNext = 0;
+    for (uint16_t i = 0; i < capacity; i++) {
+        janet_buffer_init(mailbox->messages + i, 0);
+    }
+    return mailbox;
+}
+
+static void janet_mailbox_destroy(JanetMailbox *mailbox) {
+#ifdef JANET_WINDOWS
+    DeleteCriticalSection(&mailbox->lock);
+#else
+    pthread_mutex_destroy(&mailbox->lock);
+    pthread_cond_destroy(&mailbox->cond);
+#endif
+    for (uint16_t i = 0; i < mailbox->messageCapacity; i++) {
+        janet_buffer_deinit(mailbox->messages + i);
+    }
+    free(mailbox);
+}
+
+static void janet_mailbox_lock(JanetMailbox *mailbox) {
+#ifdef JANET_WINDOWS
+    EnterCriticalSection(&mailbox->lock);
+#else
+    pthread_mutex_lock(&mailbox->lock);
+#endif
+}
+
+static void janet_mailbox_unlock(JanetMailbox *mailbox) {
+#ifdef JANET_WINDOWS
+    LeaveCriticalSection(&mailbox->lock);
+#else
+    pthread_mutex_unlock(&mailbox->lock);
+#endif
+}
+
+/* Assumes you have the mailbox lock already */
+static void janet_mailbox_ref_with_lock(JanetMailbox *mailbox, int delta) {
+    mailbox->refCount += delta;
+    if (mailbox->refCount <= 0) {
+        janet_mailbox_unlock(mailbox);
+        janet_mailbox_destroy(mailbox);
+    } else {
+        janet_mailbox_unlock(mailbox);
+    }
+}
+
+static void janet_mailbox_ref(JanetMailbox *mailbox, int delta) {
+    janet_mailbox_lock(mailbox);
+    janet_mailbox_ref_with_lock(mailbox, delta);
+}
+
+static void janet_close_thread(JanetThread *thread) {
+    if (thread->mailbox) {
+        janet_mailbox_ref(thread->mailbox, -1);
+        thread->mailbox = NULL;
+    }
+}
+
+static int thread_gc(void *p, size_t size) {
+    (void) size;
+    JanetThread *thread = (JanetThread *)p;
+    janet_close_thread(thread);
+    return 0;
+}
+
+static int thread_mark(void *p, size_t size) {
+    (void) size;
+    JanetThread *thread = (JanetThread *)p;
+    if (thread->encode) {
+        janet_mark(janet_wrap_table(thread->encode));
+    }
+    return 0;
+}
+
+/* Abstract waiting for timeout across windows/posix */
+typedef struct {
+    int timedwait;
+    int nowait;
+#ifdef JANET_WINDOWS
+    DWORD interval;
+    DWORD ticksLeft;
+#else
+    struct timespec ts;
+#endif
+} JanetWaiter;
+
+static void janet_waiter_init(JanetWaiter *waiter, double sec) {
+    waiter->timedwait = 0;
+    waiter->nowait = 0;
+
+    if (sec <= 0.0 || isnan(sec)) {
+        waiter->nowait = 1;
+        return;
+    }
+    waiter->timedwait = sec > 0.0 && !isinf(sec);
+
+    /* Set maximum wait time to 30 days */
+    if (sec > (60.0 * 60.0 * 24.0 * 30.0)) {
+        sec = 60.0 * 60.0 * 24.0 * 30.0;
+    }
+
+#ifdef JANET_WINDOWS
+    if (waiter->timedwait) {
+        waiter->ticksLeft = waiter->interval = (DWORD) floor(1000.0 * sec);
+    }
+#else
+    if (waiter->timedwait) {
+        /* N seconds -> timespec of (now + sec) */
+        struct timespec now;
+        clock_gettime(CLOCK_REALTIME, &now);
+        time_t tvsec = (time_t) floor(sec);
+        long tvnsec = (long) floor(1000000000.0 * (sec - ((double) tvsec)));
+        tvsec += now.tv_sec;
+        tvnsec += now.tv_nsec;
+        if (tvnsec >= 1000000000L) {
+            tvnsec -= 1000000000L;
+            tvsec += 1;
+        }
+        waiter->ts.tv_sec = tvsec;
+        waiter->ts.tv_nsec = tvnsec;
+    }
+#endif
+}
+
+static int janet_waiter_wait(JanetWaiter *wait, JanetMailbox *mailbox) {
+    if (wait->nowait) return 1;
+#ifdef JANET_WINDOWS
+    if (wait->timedwait) {
+        if (wait->ticksLeft == 0) return 1;
+        DWORD startTime = GetTickCount();
+        int status = !SleepConditionVariableCS(&mailbox->cond, &mailbox->lock, wait->ticksLeft);
+        DWORD dTick = GetTickCount() - startTime;
+        /* Be careful about underflow */
+        wait->ticksLeft = dTick > wait->ticksLeft ? 0 : dTick;
+        return status;
+    } else {
+        SleepConditionVariableCS(&mailbox->cond, &mailbox->lock, INFINITE);
+        return 0;
+    }
+#else
+    if (wait->timedwait) {
+        return pthread_cond_timedwait(&mailbox->cond, &mailbox->lock, &wait->ts);
+    } else {
+        pthread_cond_wait(&mailbox->cond, &mailbox->lock);
+        return 0;
+    }
+#endif
+}
+
+static void janet_mailbox_wakeup(JanetMailbox *mailbox) {
+#ifdef JANET_WINDOWS
+    WakeConditionVariable(&mailbox->cond);
+#else
+    pthread_cond_signal(&mailbox->cond);
+#endif
+}
+
+static int mailbox_at_capacity(JanetMailbox *mailbox) {
+    return mailbox->messageCount >= mailbox->messageCapacity;
+}
+
+/* Returns 1 if could not send (encode error or timeout), 2 for mailbox closed, and
+ * 0 otherwise. Will not panic.  */
+int janet_thread_send(JanetThread *thread, Janet msg, double timeout) {
+
+    /* Ensure mailbox is not closed. */
+    JanetMailbox *mailbox = thread->mailbox;
+    if (NULL == mailbox) return 2;
+    janet_mailbox_lock(mailbox);
+    if (mailbox->closed) {
+        janet_mailbox_ref_with_lock(mailbox, -1);
+        thread->mailbox = NULL;
+        return 2;
+    }
+
+    /* Back pressure */
+    if (mailbox_at_capacity(mailbox)) {
+        JanetWaiter wait;
+        janet_waiter_init(&wait, timeout);
+
+        if (wait.nowait) {
+            janet_mailbox_unlock(mailbox);
+            return 1;
+        }
+
+        /* Retry loop, as there can be multiple writers */
+        while (mailbox_at_capacity(mailbox)) {
+            if (janet_waiter_wait(&wait, mailbox)) {
+                janet_mailbox_unlock(mailbox);
+                janet_mailbox_wakeup(mailbox);
+                return 1;
+            }
+        }
+    }
+
+    /* Hack to capture all panics from marshalling. This works because
+     * we know janet_marshal won't mess with other essential global state. */
+    jmp_buf buf;
+    jmp_buf *old_buf = janet_vm_jmp_buf;
+    janet_vm_jmp_buf = &buf;
+    int32_t oldmcount = mailbox->messageCount;
+
+    int ret = 0;
+    if (setjmp(buf)) {
+        ret = 1;
+        mailbox->messageCount = oldmcount;
+    } else {
+        JanetBuffer *msgbuf = mailbox->messages + mailbox->messageNext;
+        msgbuf->count = 0;
+
+        /* Start panic zone */
+        janet_marshal(msgbuf, msg, thread->encode, 0);
+        /* End panic zone */
+
+        mailbox->messageNext = (mailbox->messageNext + 1) % mailbox->messageCapacity;
+        mailbox->messageCount++;
+    }
+
+    /* Cleanup */
+    janet_vm_jmp_buf = old_buf;
+    janet_mailbox_unlock(mailbox);
+
+    /* Potentially wake up a blocked thread */
+    janet_mailbox_wakeup(mailbox);
+
+    return ret;
+}
+
+/* Returns 0 on successful message. Returns 1 if timedout */
+int janet_thread_receive(Janet *msg_out, double timeout) {
+    JanetMailbox *mailbox = janet_vm_mailbox;
+    janet_mailbox_lock(mailbox);
+
+    /* For timeouts */
+    JanetWaiter wait;
+    janet_waiter_init(&wait, timeout);
+
+    for (;;) {
+
+        /* Check for messages waiting for us */
+        if (mailbox->messageCount > 0) {
+
+            /* Hack to capture all panics from marshalling. This works because
+             * we know janet_marshal won't mess with other essential global state. */
+            jmp_buf buf;
+            jmp_buf *old_buf = janet_vm_jmp_buf;
+            janet_vm_jmp_buf = &buf;
+
+            /* Handle errors */
+            if (setjmp(buf)) {
+                /* Cleanup jmp_buf, keep lock */
+                janet_vm_jmp_buf = old_buf;
+            } else {
+                JanetBuffer *msgbuf = mailbox->messages + mailbox->messageFirst;
+                mailbox->messageCount--;
+                mailbox->messageFirst = (mailbox->messageFirst + 1) % mailbox->messageCapacity;
+
+                /* Read from beginning of channel */
+                const uint8_t *nextItem = NULL;
+                Janet item = janet_unmarshal(
+                                 msgbuf->data, msgbuf->count,
+                                 0, mailbox->decode, &nextItem);
+                *msg_out = item;
+
+                /* Cleanup */
+                janet_vm_jmp_buf = old_buf;
+                janet_mailbox_unlock(mailbox);
+
+                /* Potentially wake up pending threads */
+                janet_mailbox_wakeup(mailbox);
+
+                return 0;
+            }
+        }
+
+        if (wait.nowait) {
+            janet_mailbox_unlock(mailbox);
+            return 1;
+        }
+
+        /* Wait for next message */
+        if (janet_waiter_wait(&wait, mailbox)) {
+            janet_mailbox_unlock(mailbox);
+            return 1;
+        }
+    }
+
+}
+
+static int janet_thread_getter(void *p, Janet key, Janet *out);
+
+static JanetAbstractType Thread_AT = {
+    "core/thread",
+    thread_gc,
+    thread_mark,
+    janet_thread_getter,
+    NULL,
+    NULL,
+    NULL,
+    NULL
+};
+
+static JanetThread *janet_make_thread(JanetMailbox *mailbox, JanetTable *encode) {
+    JanetThread *thread = janet_abstract(&Thread_AT, sizeof(JanetThread));
+    thread->mailbox = mailbox;
+    thread->encode = encode;
+    return thread;
+}
+
+JanetThread *janet_getthread(const Janet *argv, int32_t n) {
+    return (JanetThread *) janet_getabstract(argv, n, &Thread_AT);
+}
+
+/* Runs in new thread */
+static int thread_worker(JanetMailbox *mailbox) {
+    JanetFiber *fiber = NULL;
+    Janet out;
+
+    /* Use the mailbox we were given */
+    janet_vm_mailbox = mailbox;
+
+    /* Init VM */
+    janet_init();
+
+    /* Get dictionaries for default encode/decode */
+    JanetTable *encode = janet_get_core_table("make-image-dict");
+    mailbox->decode = janet_get_core_table("load-image-dict");
+
+    /* Create parent thread */
+    JanetThread *parent = janet_make_thread(mailbox->parent, encode);
+    janet_mailbox_ref(mailbox->parent, -1);
+    mailbox->parent = NULL; /* only used to create the thread */
+    Janet parentv = janet_wrap_abstract(parent);
+
+    /* Unmarshal the function */
+    Janet funcv;
+    int status = janet_thread_receive(&funcv, INFINITY);
+
+    if (status) goto error;
+    if (!janet_checktype(funcv, JANET_FUNCTION)) goto error;
+    JanetFunction *func = janet_unwrap_function(funcv);
+
+    /* Arity check */
+    if (func->def->min_arity > 1 || func->def->max_arity < 1) {
+        goto error;
+    }
+
+    /* Call function */
+    Janet argv[1] = { parentv };
+    fiber = janet_fiber(func, 64, 1, argv);
+    JanetSignal sig = janet_continue(fiber, janet_wrap_nil(), &out);
+    if (sig != JANET_SIGNAL_OK) {
+        janet_eprintf("in thread %v: ", janet_wrap_abstract(janet_make_thread(mailbox, encode)));
+        janet_stacktrace(fiber, out);
+    }
+
+    /* Normal exit */
+    janet_deinit();
+    return 0;
+
+    /* Fail to set something up */
+error:
+    janet_eprintf("\nthread failed to start\n");
+    janet_deinit();
+    return 1;
+}
+
+#ifdef JANET_WINDOWS
+
+static DWORD WINAPI janet_create_thread_wrapper(LPVOID param) {
+    thread_worker((JanetMailbox *)param);
+    return 0;
+}
+
+static int janet_thread_start_child(JanetThread *thread) {
+    HANDLE handle = CreateThread(NULL, 0, janet_create_thread_wrapper, thread->mailbox, 0, NULL);
+    int ret = NULL == handle;
+    /* Does not kill thread, simply detatches */
+    if (!ret) CloseHandle(handle);
+    return ret;
+}
+
+#else
+
+static void *janet_pthread_wrapper(void *param) {
+    thread_worker((JanetMailbox *)param);
+    return NULL;
+}
+
+static int janet_thread_start_child(JanetThread *thread) {
+    pthread_t handle;
+    int error = pthread_create(&handle, NULL, janet_pthread_wrapper, thread->mailbox);
+    if (error) {
+        return 1;
+    } else {
+        pthread_detach(handle);
+        return 0;
+    }
+}
+
+#endif
+
+/*
+ * Setup/Teardown
+ */
+
+void janet_threads_init(void) {
+    if (NULL == janet_vm_mailbox) {
+        janet_vm_mailbox = janet_mailbox_create(NULL, 1, 10);
+    }
+}
+
+void janet_threads_deinit(void) {
+    janet_mailbox_lock(janet_vm_mailbox);
+    janet_vm_mailbox->closed = 1;
+    janet_mailbox_ref_with_lock(janet_vm_mailbox, -1);
+    janet_vm_mailbox = NULL;
+    janet_vm_thread_current = NULL;
+}
+
+/*
+ * Cfuns
+ */
+
+static Janet cfun_thread_current(int32_t argc, Janet *argv) {
+    (void) argv;
+    janet_fixarity(argc, 0);
+    if (NULL == janet_vm_thread_current) {
+        janet_vm_thread_current = janet_make_thread(janet_vm_mailbox, janet_get_core_table("make-image-dict"));
+        janet_mailbox_ref(janet_vm_mailbox, 1);
+        janet_gcroot(janet_wrap_abstract(janet_vm_thread_current));
+    }
+    return janet_wrap_abstract(janet_vm_thread_current);
+}
+
+static Janet cfun_thread_new(int32_t argc, Janet *argv) {
+    janet_arity(argc, 1, 2);
+    /* Just type checking */
+    janet_getfunction(argv, 0);
+    int32_t cap = janet_optinteger(argv, argc, 1, 10);
+    if (cap < 1 || cap > UINT16_MAX) {
+        janet_panicf("bad slot #1, expected integer in range [1, 65535], got %d", cap);
+    }
+    JanetTable *encode = janet_get_core_table("make-image-dict");
+    JanetMailbox *mailbox = janet_mailbox_create(janet_vm_mailbox, 2, (uint16_t) cap);
+
+    /* one for created thread, one for ->parent reference in new mailbox */
+    janet_mailbox_ref(janet_vm_mailbox, 2);
+
+    JanetThread *thread = janet_make_thread(mailbox, encode);
+    if (janet_thread_start_child(thread)) {
+        janet_mailbox_ref(mailbox, -1); /* mailbox reference */
+        janet_mailbox_ref(janet_vm_mailbox, -1); /* ->parent reference */
+        janet_panic("could not start thread");
+    }
+
+    /* If thread started, send the worker function. */
+    if (janet_thread_send(thread, argv[0], INFINITY)) {
+        janet_panicf("could not send worker function %v to thread", argv[0]);
+    }
+
+    return janet_wrap_abstract(thread);
+}
+
+static Janet cfun_thread_send(int32_t argc, Janet *argv) {
+    janet_arity(argc, 2, 3);
+    JanetThread *thread = janet_getthread(argv, 0);
+    int status = janet_thread_send(thread, argv[1], janet_optnumber(argv, argc, 2, 1.0));
+    switch (status) {
+        default:
+            break;
+        case 1:
+            janet_panicf("failed to send message %v", argv[1]);
+        case 2:
+            janet_panic("thread mailbox is closed");
+    }
+    return argv[0];
+}
+
+static Janet cfun_thread_receive(int32_t argc, Janet *argv) {
+    janet_arity(argc, 0, 1);
+    double wait = janet_optnumber(argv, argc, 0, 1.0);
+    Janet out;
+    int status = janet_thread_receive(&out, wait);
+    switch (status) {
+        default:
+            break;
+        case 1:
+            janet_panicf("timeout after %f seconds", wait);
+    }
+    return out;
+}
+
+static Janet cfun_thread_close(int32_t argc, Janet *argv) {
+    janet_fixarity(argc, 1);
+    JanetThread *thread = janet_getthread(argv, 0);
+    janet_close_thread(thread);
+    return janet_wrap_nil();
+}
+
+static const JanetMethod janet_thread_methods[] = {
+    {"send", cfun_thread_send},
+    {"close", cfun_thread_close},
+    {NULL, NULL}
+};
+
+static int janet_thread_getter(void *p, Janet key, Janet *out) {
+    (void) p;
+    if (!janet_checktype(key, JANET_KEYWORD)) return 0;
+    return janet_getmethod(janet_unwrap_keyword(key), janet_thread_methods, out);
+}
+
+static const JanetReg threadlib_cfuns[] = {
+    {
+        "thread/current", cfun_thread_current,
+        JDOC("(thread/current)\n\n"
+             "Get the current running thread.")
+    },
+    {
+        "thread/new", cfun_thread_new,
+        JDOC("(thread/new func &opt capacity)\n\n"
+             "Start a new thread that will start immediately. "
+             "If capacity is provided, that is how many messages can be stored in the thread's mailbox before blocking senders. "
+             "The capacity must be between 1 and 65535 inclusive, and defaults to 10. "
+             "Returns a handle to the new thread.")
+    },
+    {
+        "thread/send", cfun_thread_send,
+        JDOC("(thread/send thread msg)\n\n"
+             "Send a message to the thread. This will never block and returns thread immediately. "
+             "Will throw an error if there is a problem sending the message.")
+    },
+    {
+        "thread/receive", cfun_thread_receive,
+        JDOC("(thread/receive &opt timeout)\n\n"
+             "Get a message sent to this thread. If timeout is provided, an error will be thrown after the timeout has elapsed but "
+             "no messages are received.")
+    },
+    {
+        "thread/close", cfun_thread_close,
+        JDOC("(thread/close thread)\n\n"
+             "Close a thread, unblocking it and ending communication with it. Note that closing "
+             "a thread is idempotent and does not cancel the thread's operation. Returns nil.")
+    },
+    {NULL, NULL, NULL}
+};
+
+/* Module entry point */
+void janet_lib_thread(JanetTable *env) {
+    janet_core_cfuns(env, NULL, threadlib_cfuns);
+    janet_register_abstract_type(&Thread_AT);
+}
+
+#endif

src/core/tuple.c

@@ -33,8 +33,8 @@
 Janet *janet_tuple_begin(int32_t length) {
     size_t size = sizeof(JanetTupleHead) + (length * sizeof(Janet));
     JanetTupleHead *head = janet_gcalloc(JANET_MEMORY_TUPLE, size);
-    head->sm_start = -1;
-    head->sm_end = -1;
+    head->sm_line = -1;
+    head->sm_column = -1;
     head->length = length;
     return (Janet *)(head->data);
 }
@@ -100,8 +100,8 @@ static Janet cfun_tuple_brackets(int32_t argc, Janet *argv) {
 }
 
 static Janet cfun_tuple_slice(int32_t argc, Janet *argv) {
-    JanetRange range = janet_getslice(argc, argv);
     JanetView view = janet_getindexed(argv, 0);
+    JanetRange range = janet_getslice(argc, argv);
     return janet_wrap_tuple(janet_tuple_n(view.items + range.start, range.end - range.start));
 }
 
@@ -119,16 +119,16 @@ static Janet cfun_tuple_sourcemap(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 1);
     const Janet *tup = janet_gettuple(argv, 0);
     Janet contents[2];
-    contents[0] = janet_wrap_integer(janet_tuple_head(tup)->sm_start);
-    contents[1] = janet_wrap_integer(janet_tuple_head(tup)->sm_end);
+    contents[0] = janet_wrap_integer(janet_tuple_head(tup)->sm_line);
+    contents[1] = janet_wrap_integer(janet_tuple_head(tup)->sm_column);
     return janet_wrap_tuple(janet_tuple_n(contents, 2));
 }
 
 static Janet cfun_tuple_setmap(int32_t argc, Janet *argv) {
     janet_fixarity(argc, 3);
     const Janet *tup = janet_gettuple(argv, 0);
-    janet_tuple_head(tup)->sm_start = janet_getinteger(argv, 1);
-    janet_tuple_head(tup)->sm_end = janet_getinteger(argv, 2);
+    janet_tuple_head(tup)->sm_line = janet_getinteger(argv, 1);
+    janet_tuple_head(tup)->sm_column = janet_getinteger(argv, 2);
     return argv[0];
 }
 
@@ -143,7 +143,10 @@ static const JanetReg tuple_cfuns[] = {
         JDOC("(tuple/slice arrtup [,start=0 [,end=(length arrtup)]])\n\n"
              "Take a sub sequence of an array or tuple from index start "
              "inclusive to index end exclusive. If start or end are not provided, "
-             "they default to 0 and the length of arrtup respectively."
+             "they default to 0 and the length of arrtup respectively. "
+             "'start' and 'end' can also be negative to indicate indexing "
+             "from the end of the input. Note that index -1 is synonymous with "
+             "index '(length arrtup)' to allow a full negative slice range. "
              "Returns the new tuple.")
     },
     {
@@ -158,16 +161,14 @@ static const JanetReg tuple_cfuns[] = {
     {
         "tuple/sourcemap", cfun_tuple_sourcemap,
         JDOC("(tuple/sourcemap tup)\n\n"
-             "Returns the sourcemap metadata attached to a tuple. "
-             "The mapping is represented by a pair of byte offsets into the "
-             "the source code representing the start and end byte indices where "
-             "the tuple is. ")
+             "Returns the sourcemap metadata attached to a tuple, "
+             " which is another tuple (line, column).")
     },
     {
         "tuple/setmap", cfun_tuple_setmap,
-        JDOC("(tuple/setmap tup start end)\n\n"
-             "Set the sourcemap metadata on a tuple. start and end should "
-             "be integers representing byte offsets into the file. Returns tup.")
+        JDOC("(tuple/setmap tup line column)\n\n"
+             "Set the sourcemap metadata on a tuple. line and column indicate "
+             "should be integers.")
     },
     {NULL, NULL, NULL}
 };

src/core/typedarray.c

@@ -94,17 +94,20 @@ static int ta_buffer_gc(void *p, size_t s) {
 
 static void ta_buffer_marshal(void *p, JanetMarshalContext *ctx) {
     JanetTArrayBuffer *buf = (JanetTArrayBuffer *)p;
+    janet_marshal_abstract(ctx, p);
     janet_marshal_size(ctx, buf->size);
     janet_marshal_int(ctx, buf->flags);
     janet_marshal_bytes(ctx, buf->data, buf->size);
 }
 
-static void ta_buffer_unmarshal(void *p, JanetMarshalContext *ctx) {
-    JanetTArrayBuffer *buf = (JanetTArrayBuffer *)p;
+static void *ta_buffer_unmarshal(JanetMarshalContext *ctx) {
+    JanetTArrayBuffer *buf = janet_unmarshal_abstract(ctx, sizeof(JanetTArrayBuffer));
     size_t size = janet_unmarshal_size(ctx);
+    int32_t flags = janet_unmarshal_int(ctx);
     ta_buffer_init(buf, size);
-    buf->flags = janet_unmarshal_int(ctx);
+    buf->flags = flags;
     janet_unmarshal_bytes(ctx, buf->data, size);
+    return buf;
 }
 
 static const JanetAbstractType ta_buffer_type = {
@@ -128,6 +131,7 @@ static int ta_mark(void *p, size_t s) {
 static void ta_view_marshal(void *p, JanetMarshalContext *ctx) {
     JanetTArrayView *view = (JanetTArrayView *)p;
     size_t offset = (view->buffer->data - view->as.u8);
+    janet_marshal_abstract(ctx, p);
     janet_marshal_size(ctx, view->size);
     janet_marshal_size(ctx, view->stride);
     janet_marshal_int(ctx, view->type);
@@ -135,11 +139,11 @@ static void ta_view_marshal(void *p, JanetMarshalContext *ctx) {
     janet_marshal_janet(ctx, janet_wrap_abstract(view->buffer));
 }
 
-static void ta_view_unmarshal(void *p, JanetMarshalContext *ctx) {
-    JanetTArrayView *view = (JanetTArrayView *)p;
+static void *ta_view_unmarshal(JanetMarshalContext *ctx) {
     size_t offset;
     int32_t atype;
     Janet buffer;
+    JanetTArrayView *view = janet_unmarshal_abstract(ctx, sizeof(JanetTArrayView));
     view->size = janet_unmarshal_size(ctx);
     view->stride = janet_unmarshal_size(ctx);
     atype = janet_unmarshal_int(ctx);
@@ -157,54 +161,55 @@ static void ta_view_unmarshal(void *p, JanetMarshalContext *ctx) {
     if (view->buffer->size < buf_need_size)
         janet_panic("bad typed array offset in marshalled data");
     view->as.u8 = view->buffer->data + offset;
+    return view;
 }
 
 static JanetMethod tarray_view_methods[6];
 
-static Janet ta_getter(void *p, Janet key) {
-    Janet value;
+static int ta_getter(void *p, Janet key, Janet *out) {
     size_t index, i;
     JanetTArrayView *array = p;
-    if (janet_checktype(key, JANET_KEYWORD))
-        return janet_getmethod(janet_unwrap_keyword(key), tarray_view_methods);
+    if (janet_checktype(key, JANET_KEYWORD)) {
+        return janet_getmethod(janet_unwrap_keyword(key), tarray_view_methods, out);
+    }
     if (!janet_checksize(key)) janet_panic("expected size as key");
     index = (size_t) janet_unwrap_number(key);
     i = index * array->stride;
     if (index >= array->size) {
-        value = janet_wrap_nil();
+        return 0;
     } else {
         switch (array->type) {
             case JANET_TARRAY_TYPE_U8:
-                value = janet_wrap_number(array->as.u8[i]);
+                *out = janet_wrap_number(array->as.u8[i]);
                 break;
             case JANET_TARRAY_TYPE_S8:
-                value = janet_wrap_number(array->as.s8[i]);
+                *out = janet_wrap_number(array->as.s8[i]);
                 break;
             case JANET_TARRAY_TYPE_U16:
-                value = janet_wrap_number(array->as.u16[i]);
+                *out = janet_wrap_number(array->as.u16[i]);
                 break;
             case JANET_TARRAY_TYPE_S16:
-                value = janet_wrap_number(array->as.s16[i]);
+                *out = janet_wrap_number(array->as.s16[i]);
                 break;
             case JANET_TARRAY_TYPE_U32:
-                value = janet_wrap_number(array->as.u32[i]);
+                *out = janet_wrap_number(array->as.u32[i]);
                 break;
             case JANET_TARRAY_TYPE_S32:
-                value = janet_wrap_number(array->as.s32[i]);
+                *out = janet_wrap_number(array->as.s32[i]);
                 break;
 #ifdef JANET_INT_TYPES
             case JANET_TARRAY_TYPE_U64:
-                value = janet_wrap_u64(array->as.u64[i]);
+                *out = janet_wrap_u64(array->as.u64[i]);
                 break;
             case JANET_TARRAY_TYPE_S64:
-                value = janet_wrap_s64(array->as.s64[i]);
+                *out = janet_wrap_s64(array->as.s64[i]);
                 break;
 #endif
             case JANET_TARRAY_TYPE_F32:
-                value = janet_wrap_number_safe(array->as.f32[i]);
+                *out = janet_wrap_number_safe(array->as.f32[i]);
                 break;
             case JANET_TARRAY_TYPE_F64:
-                value = janet_wrap_number_safe(array->as.f64[i]);
+                *out = janet_wrap_number_safe(array->as.f64[i]);
                 break;
             default:
                 janet_panicf("cannot get from typed array of type %s",
@@ -212,7 +217,7 @@ static Janet ta_getter(void *p, Janet key) {
                 break;
         }
     }
-    return value;
+    return 1;
 }
 
 static void ta_setter(void *p, Janet key, Janet value) {
@@ -445,7 +450,8 @@ static Janet cfun_typed_array_slice(int32_t argc, Janet *argv) {
     JanetArray *array = janet_array(range.end - range.start);
     if (array->data) {
         for (int32_t i = range.start; i < range.end; i++) {
-            array->data[i - range.start] = ta_getter(src, janet_wrap_number(i));
+            if (!ta_getter(src, janet_wrap_number(i), &array->data[i - range.start]))
+                array->data[i - range.start] = janet_wrap_nil();
         }
     }
     array->count = range.end - range.start;

src/core/util.c

@@ -331,18 +331,9 @@ const JanetAbstractType *janet_get_abstract_type(Janet key) {
 void janet_core_def(JanetTable *env, const char *name, Janet x, const void *p) {
     (void) p;
     Janet key = janet_csymbolv(name);
-    Janet value;
-    /* During init, allow replacing core library cfunctions with values from
-     * the env. */
-    Janet check = janet_table_get(env, key);
-    if (janet_checktype(check, JANET_NIL)) {
-        value = x;
-    } else {
-        value = check;
-    }
-    janet_table_put(env, key, value);
-    if (janet_checktype(value, JANET_CFUNCTION)) {
-        janet_table_put(janet_vm_registry, value, key);
+    janet_table_put(env, key, x);
+    if (janet_checktype(x, JANET_CFUNCTION)) {
+        janet_table_put(janet_vm_registry, x, key);
     }
 }
 
@@ -379,6 +370,14 @@ JanetBindingType janet_resolve(JanetTable *env, const uint8_t *sym, Janet *out)
     return JANET_BINDING_DEF;
 }
 
+/* Resolve a symbol in the core environment. */
+Janet janet_resolve_core(const char *name) {
+    JanetTable *env = janet_core_env(NULL);
+    Janet out = janet_wrap_nil();
+    janet_resolve(env, janet_csymbol(name), &out);
+    return out;
+}
+
 /* Read both tuples and arrays as c pointers + int32_t length. Return 1 if the
  * view can be constructed, 0 if an invalid type. */
 int janet_indexed_view(Janet seq, const Janet **data, int32_t *len) {
@@ -449,3 +448,12 @@ int janet_checksize(Janet x) {
     return dval == (double)((size_t) dval) &&
            dval <= SIZE_MAX;
 }
+
+JanetTable *janet_get_core_table(const char *name) {
+    JanetTable *env = janet_core_env(NULL);
+    Janet out = janet_wrap_nil();
+    JanetBindingType bt = janet_resolve(env, janet_csymbol(name), &out);
+    if (bt == JANET_BINDING_NONE) return NULL;
+    if (!janet_checktype(out, JANET_TABLE)) return NULL;
+    return janet_unwrap_table(out);
+}

src/core/util.h

@@ -72,6 +72,7 @@ const JanetKV *janet_dict_find(const JanetKV *buckets, int32_t cap, Janet key);
 Janet janet_dict_get(const JanetKV *buckets, int32_t cap, Janet key);
 void janet_memempty(JanetKV *mem, int32_t count);
 void *janet_memalloc_empty(int32_t count);
+JanetTable *janet_get_core_table(const char *name);
 const void *janet_strbinsearch(
     const void *tab,
     size_t tabcount,
@@ -120,5 +121,8 @@ void janet_lib_typed_array(JanetTable *env);
 #ifdef JANET_INT_TYPES
 void janet_lib_inttypes(JanetTable *env);
 #endif
+#ifdef JANET_THREADS
+void janet_lib_thread(JanetTable *env);
+#endif
 
 #endif

src/core/value.c

@@ -145,8 +145,18 @@ int janet_compare(Janet x, Janet y) {
     return (janet_type(x) < janet_type(y)) ? -1 : 1;
 }
 
+static int32_t getter_checkint(Janet key, int32_t max) {
+    if (!janet_checkint(key)) goto bad;
+    int32_t ret = janet_unwrap_integer(key);
+    if (ret < 0) goto bad;
+    if (ret >= max) goto bad;
+    return ret;
+bad:
+    janet_panicf("expected integer key in range [0, %d), got %v", max, key);
+}
+
 /* Gets a value and returns. Can panic. */
-Janet janet_get(Janet ds, Janet key) {
+Janet janet_in(Janet ds, Janet key) {
     Janet value;
     switch (janet_type(ds)) {
         default:
@@ -160,62 +170,35 @@ Janet janet_get(Janet ds, Janet key) {
             break;
         case JANET_ARRAY: {
             JanetArray *array = janet_unwrap_array(ds);
-            int32_t index;
-            if (!janet_checkint(key))
-                janet_panic("expected integer key");
-            index = janet_unwrap_integer(key);
-            if (index < 0 || index >= array->count) {
-                value = janet_wrap_nil();
-            } else {
-                value = array->data[index];
-            }
+            int32_t index = getter_checkint(key, array->count);
+            value = array->data[index];
             break;
         }
         case JANET_TUPLE: {
             const Janet *tuple = janet_unwrap_tuple(ds);
-            int32_t index;
-            if (!janet_checkint(key))
-                janet_panic("expected integer key");
-            index = janet_unwrap_integer(key);
-            if (index < 0 || index >= janet_tuple_length(tuple)) {
-                value = janet_wrap_nil();
-            } else {
-                value = tuple[index];
-            }
+            int32_t len = janet_tuple_length(tuple);
+            value = tuple[getter_checkint(key, len)];
             break;
         }
         case JANET_BUFFER: {
             JanetBuffer *buffer = janet_unwrap_buffer(ds);
-            int32_t index;
-            if (!janet_checkint(key))
-                janet_panic("expected integer key");
-            index = janet_unwrap_integer(key);
-            if (index < 0 || index >= buffer->count) {
-                value = janet_wrap_nil();
-            } else {
-                value = janet_wrap_integer(buffer->data[index]);
-            }
+            int32_t index = getter_checkint(key, buffer->count);
+            value = janet_wrap_integer(buffer->data[index]);
             break;
         }
         case JANET_STRING:
         case JANET_SYMBOL:
         case JANET_KEYWORD: {
             const uint8_t *str = janet_unwrap_string(ds);
-            int32_t index;
-            if (!janet_checkint(key))
-                janet_panic("expected integer key");
-            index = janet_unwrap_integer(key);
-            if (index < 0 || index >= janet_string_length(str)) {
-                value = janet_wrap_nil();
-            } else {
-                value = janet_wrap_integer(str[index]);
-            }
+            int32_t index = getter_checkint(key, janet_string_length(str));
+            value = janet_wrap_integer(str[index]);
             break;
         }
         case JANET_ABSTRACT: {
             JanetAbstractType *type = (JanetAbstractType *)janet_abstract_type(janet_unwrap_abstract(ds));
             if (type->get) {
-                value = (type->get)(janet_unwrap_abstract(ds), key);
+                if (!(type->get)(janet_unwrap_abstract(ds), key, &value))
+                    janet_panicf("key %v not found in %v ", key, ds);
             } else {
                 janet_panicf("no getter for %v ", ds);
             }
@@ -225,6 +208,60 @@ Janet janet_get(Janet ds, Janet key) {
     return value;
 }
 
+Janet janet_get(Janet ds, Janet key) {
+    JanetType t = janet_type(ds);
+    switch (t) {
+        default:
+            return janet_wrap_nil();
+        case JANET_STRING:
+        case JANET_SYMBOL:
+        case JANET_KEYWORD: {
+            if (!janet_checkint(key)) return janet_wrap_nil();
+            int32_t index = janet_unwrap_integer(key);
+            if (index < 0) return janet_wrap_nil();
+            const uint8_t *str = janet_unwrap_string(ds);
+            if (index >= janet_string_length(str)) return janet_wrap_nil();
+            return janet_wrap_integer(str[index]);
+        }
+        case JANET_ABSTRACT: {
+            Janet value;
+            void *abst = janet_unwrap_abstract(ds);
+            JanetAbstractType *type = (JanetAbstractType *)janet_abstract_type(abst);
+            if (!type->get) return janet_wrap_nil();
+            if ((type->get)(abst, key, &value))
+                return value;
+            return janet_wrap_nil();
+        }
+        case JANET_ARRAY:
+        case JANET_TUPLE:
+        case JANET_BUFFER: {
+            if (!janet_checkint(key)) return janet_wrap_nil();
+            int32_t index = janet_unwrap_integer(key);
+            if (index < 0) return janet_wrap_nil();
+            if (t == JANET_ARRAY) {
+                JanetArray *a = janet_unwrap_array(ds);
+                if (index >= a->count) return janet_wrap_nil();
+                return a->data[index];
+            } else if (t == JANET_BUFFER) {
+                JanetBuffer *b = janet_unwrap_buffer(ds);
+                if (index >= b->count) return janet_wrap_nil();
+                return janet_wrap_integer(b->data[index]);
+            } else {
+                const Janet *t = janet_unwrap_tuple(ds);
+                if (index >= janet_tuple_length(t)) return janet_wrap_nil();
+                return t[index];
+            }
+        }
+        case JANET_TABLE: {
+            return janet_table_get(janet_unwrap_table(ds), key);
+        }
+        case JANET_STRUCT: {
+            const JanetKV *st = janet_unwrap_struct(ds);
+            return janet_struct_get(st, key);
+        }
+    }
+}
+
 Janet janet_getindex(Janet ds, int32_t index) {
     Janet value;
     if (index < 0) janet_panic("expected non-negative index");
@@ -271,7 +308,8 @@ Janet janet_getindex(Janet ds, int32_t index) {
         case JANET_ABSTRACT: {
             JanetAbstractType *type = (JanetAbstractType *)janet_abstract_type(janet_unwrap_abstract(ds));
             if (type->get) {
-                value = (type->get)(janet_unwrap_abstract(ds), janet_wrap_integer(index));
+                if (!(type->get)(janet_unwrap_abstract(ds), janet_wrap_integer(index), &value))
+                    value = janet_wrap_nil();
             } else {
                 janet_panicf("no getter for %v ", ds);
             }
@@ -299,6 +337,38 @@ int32_t janet_length(Janet x) {
             return janet_struct_length(janet_unwrap_struct(x));
         case JANET_TABLE:
             return janet_unwrap_table(x)->count;
+        case JANET_ABSTRACT: {
+            Janet argv[1] = { x };
+            Janet len = janet_mcall("length", 1, argv);
+            if (!janet_checkint(len))
+                janet_panicf("invalid integer length %v", len);
+            return janet_unwrap_integer(len);
+        }
+    }
+}
+
+Janet janet_lengthv(Janet x) {
+    switch (janet_type(x)) {
+        default:
+            janet_panicf("expected %T, got %v", JANET_TFLAG_LENGTHABLE, x);
+        case JANET_STRING:
+        case JANET_SYMBOL:
+        case JANET_KEYWORD:
+            return janet_wrap_integer(janet_string_length(janet_unwrap_string(x)));
+        case JANET_ARRAY:
+            return janet_wrap_integer(janet_unwrap_array(x)->count);
+        case JANET_BUFFER:
+            return janet_wrap_integer(janet_unwrap_buffer(x)->count);
+        case JANET_TUPLE:
+            return janet_wrap_integer(janet_tuple_length(janet_unwrap_tuple(x)));
+        case JANET_STRUCT:
+            return janet_wrap_integer(janet_struct_length(janet_unwrap_struct(x)));
+        case JANET_TABLE:
+            return janet_wrap_integer(janet_unwrap_table(x)->count);
+        case JANET_ABSTRACT: {
+            Janet argv[1] = { x };
+            return janet_mcall("length", 1, argv);
+        }
     }
 }
 
@@ -324,7 +394,7 @@ void janet_putindex(Janet ds, int32_t index, Janet value) {
                 janet_buffer_ensure(buffer, index + 1, 2);
                 buffer->count = index + 1;
             }
-            buffer->data[index] = janet_unwrap_integer(value);
+            buffer->data[index] = (uint8_t)(janet_unwrap_integer(value) & 0xFF);
             break;
         }
         case JANET_TABLE: {
@@ -350,11 +420,8 @@ void janet_put(Janet ds, Janet key, Janet value) {
             janet_panicf("expected %T, got %v",
                          JANET_TFLAG_ARRAY | JANET_TFLAG_BUFFER | JANET_TFLAG_TABLE, ds);
         case JANET_ARRAY: {
-            int32_t index;
             JanetArray *array = janet_unwrap_array(ds);
-            if (!janet_checkint(key)) janet_panicf("expected integer key, got %v", key);
-            index = janet_unwrap_integer(key);
-            if (index < 0 || index == INT32_MAX) janet_panicf("bad integer key, got %v", key);
+            int32_t index = getter_checkint(key, INT32_MAX - 1);
             if (index >= array->count) {
                 janet_array_setcount(array, index + 1);
             }
@@ -362,11 +429,8 @@ void janet_put(Janet ds, Janet key, Janet value) {
             break;
         }
         case JANET_BUFFER: {
-            int32_t index;
             JanetBuffer *buffer = janet_unwrap_buffer(ds);
-            if (!janet_checkint(key)) janet_panicf("expected integer key, got %v", key);
-            index = janet_unwrap_integer(key);
-            if (index < 0 || index == INT32_MAX) janet_panicf("bad integer key, got %v", key);
+            int32_t index = getter_checkint(key, INT32_MAX - 1);
             if (!janet_checkint(value))
                 janet_panicf("can only put integers in buffers, got %v", value);
             if (index >= buffer->count) {

src/core/vector.c

@@ -30,7 +30,8 @@ void *janet_v_grow(void *v, int32_t increment, int32_t itemsize) {
     int32_t dbl_cur = (NULL != v) ? 2 * janet_v__cap(v) : 0;
     int32_t min_needed = janet_v_count(v) + increment;
     int32_t m = dbl_cur > min_needed ? dbl_cur : min_needed;
-    int32_t *p = (int32_t *) janet_srealloc(v ? janet_v__raw(v) : 0, itemsize * m + sizeof(int32_t) * 2);
+    size_t newsize = ((size_t) itemsize) * m + sizeof(int32_t) * 2;
+    int32_t *p = (int32_t *) janet_srealloc(v ? janet_v__raw(v) : 0, newsize);
     if (!v) p[1] = 0;
     p[0] = m;
     return p + 2;

src/core/vm.c

@@ -30,6 +30,7 @@
 #endif
 
 /* VM state */
+JANET_THREAD_LOCAL JanetTable *janet_vm_core_env;
 JANET_THREAD_LOCAL JanetTable *janet_vm_registry;
 JANET_THREAD_LOCAL int janet_vm_stackn = 0;
 JANET_THREAD_LOCAL JanetFiber *janet_vm_fiber = NULL;
@@ -117,9 +118,16 @@ JANET_THREAD_LOCAL jmp_buf *janet_vm_jmp_buf = NULL;
     {\
         Janet op1 = stack[B];\
         vm_assert_type(op1, JANET_NUMBER);\
-        double x1 = janet_unwrap_number(op1);\
-        stack[A] = janet_wrap_number(x1 op CS);\
-        vm_pcnext();\
+        if (!janet_checktype(op1, JANET_NUMBER)) {\
+            vm_commit();\
+            Janet _argv[2] = { op1, janet_wrap_number(CS) };\
+            stack[A] = janet_mcall(#op, 2, _argv);\
+            vm_pcnext();\
+        } else {\
+            double x1 = janet_unwrap_number(op1);\
+            stack[A] = janet_wrap_number(x1 op CS);\
+            vm_pcnext();\
+        }\
     }
 #define _vm_bitop_immediate(op, type1)\
     {\
@@ -135,12 +143,19 @@ JANET_THREAD_LOCAL jmp_buf *janet_vm_jmp_buf = NULL;
     {\
         Janet op1 = stack[B];\
         Janet op2 = stack[C];\
-        vm_assert_type(op1, JANET_NUMBER);\
-        vm_assert_type(op2, JANET_NUMBER);\
-        double x1 = janet_unwrap_number(op1);\
-        double x2 = janet_unwrap_number(op2);\
-        stack[A] = wrap(x1 op x2);\
-        vm_pcnext();\
+        if (!janet_checktype(op1, JANET_NUMBER)) {\
+            vm_commit();\
+            Janet _argv[2] = { op1, op2 };\
+            stack[A] = janet_mcall(#op, 2, _argv);\
+            vm_pcnext();\
+        } else {\
+            vm_assert_type(op1, JANET_NUMBER);\
+            vm_assert_type(op2, JANET_NUMBER);\
+            double x1 = janet_unwrap_number(op1);\
+            double x2 = janet_unwrap_number(op2);\
+            stack[A] = wrap(x1 op x2);\
+            vm_pcnext();\
+        }\
     }
 #define vm_binop(op) _vm_binop(op, janet_wrap_number)
 #define vm_numcomp(op) _vm_binop(op, janet_wrap_boolean)
@@ -179,7 +194,7 @@ static void vm_do_trace(JanetFunction *func) {
 static Janet call_nonfn(JanetFiber *fiber, Janet callee) {
     int32_t argn = fiber->stacktop - fiber->stackstart;
     Janet ds, key;
-    if (argn != 1) janet_panicf("%v called with arity %d, expected 1", callee, argn);
+    if (argn != 1) janet_panicf("%v called with %d arguments, possibly expected 1", callee, argn);
     if (janet_checktypes(callee, JANET_TFLAG_INDEXED | JANET_TFLAG_DICTIONARY |
                          JANET_TFLAG_STRING | JANET_TFLAG_BUFFER | JANET_TFLAG_ABSTRACT)) {
         ds = callee;
@@ -189,13 +204,13 @@ static Janet call_nonfn(JanetFiber *fiber, Janet callee) {
         key = callee;
     }
     fiber->stacktop = fiber->stackstart;
-    return janet_get(ds, key);
+    return janet_in(ds, key);
 }
 
 /* Get a callable from a keyword method name and check ensure that it is valid. */
 static Janet resolve_method(Janet name, JanetFiber *fiber) {
     int32_t argc = fiber->stacktop - fiber->stackstart;
-    if (argc < 1) janet_panicf("method call takes at least 1 argument, got %d", argc);
+    if (argc < 1) janet_panicf("method call (%v) takes at least 1 argument, got 0", name);
     Janet callee = janet_get(fiber->data[fiber->stackstart], name);
     if (janet_checktype(callee, JANET_NIL))
         janet_panicf("unknown method %v invoked on %v", name, fiber->data[fiber->stackstart]);
@@ -260,6 +275,7 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
         &&label_JOP_RESUME,
         &&label_JOP_SIGNAL,
         &&label_JOP_PROPAGATE,
+        &&label_JOP_IN,
         &&label_JOP_GET,
         &&label_JOP_PUT,
         &&label_JOP_GET_INDEX,
@@ -277,6 +293,190 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
         &&label_JOP_NUMERIC_GREATER_THAN,
         &&label_JOP_NUMERIC_GREATER_THAN_EQUAL,
         &&label_JOP_NUMERIC_EQUAL,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
+        &&label_unknown_op,
         &&label_unknown_op
     };
 #endif
@@ -291,21 +491,20 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
      * waiting to be resumed. In those cases, use input and increment pc. We
      * DO NOT use input when resuming a fiber that has been interrupted at a
      * breakpoint. */
+    uint8_t first_opcode;
     if (status != JANET_STATUS_NEW &&
             ((*pc & 0xFF) == JOP_SIGNAL ||
              (*pc & 0xFF) == JOP_PROPAGATE ||
              (*pc & 0xFF) == JOP_RESUME)) {
         stack[A] = in;
         pc++;
+        first_opcode = *pc & 0xFF;
+    } else if (status == JANET_STATUS_DEBUG) {
+        first_opcode = *pc & 0x7F;
+    } else {
+        first_opcode = *pc & 0xFF;
     }
 
-    /* The first opcode to execute. If the first opcode has
-     * the breakpoint bit set and we were in the debug state, skip
-     * that first breakpoint. */
-    uint8_t first_opcode = (status == JANET_STATUS_DEBUG)
-                           ? (*pc & 0x7F)
-                           : (*pc & 0xFF);
-
     /* Main interpreter loop. Semantically is a switch on
      * (*pc & 0xFF) inside of an infinite loop. */
     VM_START();
@@ -628,6 +827,9 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
 
     VM_OP(JOP_TAILCALL) {
         Janet callee = stack[D];
+        if (fiber->stacktop > fiber->maxstack) {
+            vm_throw("stack overflow");
+        }
         if (janet_checktype(callee, JANET_KEYWORD)) {
             vm_commit();
             callee = resolve_method(callee, fiber);
@@ -690,12 +892,14 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
         Janet fv = stack[C];
         vm_assert_type(fv, JANET_FIBER);
         JanetFiber *f = janet_unwrap_fiber(fv);
-        JanetFiberStatus status = janet_fiber_status(f);
-        if (status > JANET_STATUS_USER9) {
-            vm_throw("cannot propagate from new or alive fiber");
+        JanetFiberStatus sub_status = janet_fiber_status(f);
+        if (sub_status > JANET_STATUS_USER9) {
+            vm_commit();
+            janet_panicf("cannot propagate from fiber with status :%s",
+                         janet_status_names[sub_status]);
         }
         janet_vm_fiber->child = f;
-        vm_return((int) status, stack[B]);
+        vm_return((int) sub_status, stack[B]);
     }
 
     VM_OP(JOP_PUT)
@@ -708,6 +912,11 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
     janet_putindex(stack[A], C, stack[B]);
     vm_checkgc_pcnext();
 
+    VM_OP(JOP_IN)
+    vm_commit();
+    stack[A] = janet_in(stack[B], stack[C]);
+    vm_pcnext();
+
     VM_OP(JOP_GET)
     vm_commit();
     stack[A] = janet_get(stack[B], stack[C]);
@@ -720,7 +929,7 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
 
     VM_OP(JOP_LENGTH)
     vm_commit();
-    stack[A] = janet_wrap_integer(janet_length(stack[E]));
+    stack[A] = janet_lengthv(stack[E]);
     vm_pcnext();
 
     VM_OP(JOP_MAKE_ARRAY) {
@@ -747,8 +956,10 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
     VM_OP(JOP_MAKE_TABLE) {
         int32_t count = fiber->stacktop - fiber->stackstart;
         Janet *mem = fiber->data + fiber->stackstart;
-        if (count & 1)
-            vm_throw("expected even number of arguments to table constructor");
+        if (count & 1) {
+            vm_commit();
+            janet_panicf("expected even number of arguments to table constructor, got %d", count);
+        }
         JanetTable *table = janet_table(count / 2);
         for (int32_t i = 0; i < count; i += 2)
             janet_table_put(table, mem[i], mem[i + 1]);
@@ -760,8 +971,10 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
     VM_OP(JOP_MAKE_STRUCT) {
         int32_t count = fiber->stacktop - fiber->stackstart;
         Janet *mem = fiber->data + fiber->stackstart;
-        if (count & 1)
-            vm_throw("expected even number of arguments to struct constructor");
+        if (count & 1) {
+            vm_commit();
+            janet_panicf("expected even number of arguments to struct constructor, got %d", count);
+        }
         JanetKV *st = janet_struct_begin(count / 2);
         for (int32_t i = 0; i < count; i += 2)
             janet_struct_put(st, mem[i], mem[i + 1]);
@@ -797,6 +1010,68 @@ static JanetSignal run_vm(JanetFiber *fiber, Janet in, JanetFiberStatus status)
     VM_END()
 }
 
+/*
+ * Execute a single instruction in the fiber. Does this by inspecting
+ * the fiber, setting a breakpoint at the next instruction, executing, and
+ * reseting breakpoints to how they were prior. Yes, it's a bit hacky.
+ */
+JanetSignal janet_step(JanetFiber *fiber, Janet in, Janet *out) {
+    /* No finished or currently alive fibers. */
+    JanetFiberStatus status = janet_fiber_status(fiber);
+    if (status == JANET_STATUS_ALIVE ||
+            status == JANET_STATUS_DEAD ||
+            status == JANET_STATUS_ERROR) {
+        janet_panicf("cannot step fiber with status :%s", janet_status_names[status]);
+    }
+
+    /* Get PC for setting breakpoints */
+    uint32_t *pc = janet_stack_frame(fiber->data + fiber->frame)->pc;
+
+    /* Check current opcode (sans debug flag). This tells us where the next or next two candidate
+     * instructions will be. Usually it's the next instruction in memory,
+     * but for branching instructions it is also the target of the branch. */
+    uint32_t *nexta = NULL, *nextb = NULL, olda = 0, oldb = 0;
+
+    /* Set temporary breakpoints */
+    switch (*pc & 0x7F) {
+        default:
+            nexta = pc + 1;
+            break;
+        /* These we just ignore for now. Supporting them means
+         * we could step into and out of functions (including JOP_CALL). */
+        case JOP_RETURN_NIL:
+        case JOP_RETURN:
+        case JOP_ERROR:
+        case JOP_TAILCALL:
+            break;
+        case JOP_JUMP:
+            nexta = pc + DS;
+            break;
+        case JOP_JUMP_IF:
+        case JOP_JUMP_IF_NOT:
+            nexta = pc + 1;
+            nextb = pc + ES;
+            break;
+    }
+    if (nexta) {
+        olda = *nexta;
+        *nexta |= 0x80;
+    }
+    if (nextb) {
+        oldb = *nextb;
+        *nextb |= 0x80;
+    }
+
+    /* Go */
+    JanetSignal signal = janet_continue(fiber, in, out);
+
+    /* Restore */
+    if (nexta) *nexta = olda;
+    if (nextb) *nextb = oldb;
+
+    return signal;
+}
+
 Janet janet_call(JanetFunction *fun, int32_t argc, const Janet *argv) {
     /* Check entry conditions */
     if (!janet_vm_fiber)
@@ -843,7 +1118,9 @@ JanetSignal janet_continue(JanetFiber *fiber, Janet in, Janet *out) {
     if (old_status == JANET_STATUS_ALIVE ||
             old_status == JANET_STATUS_DEAD ||
             old_status == JANET_STATUS_ERROR) {
-        *out = janet_cstringv("cannot resume alive, dead, or errored fiber");
+        const uint8_t *str = janet_formatc("cannot resume fiber with status :%s",
+                                           janet_status_names[old_status]);
+        *out = janet_wrap_string(str);
         return JANET_SIGNAL_ERROR;
     }
 
@@ -876,7 +1153,11 @@ JanetSignal janet_continue(JanetFiber *fiber, Janet in, Janet *out) {
 
     /* Run loop */
     JanetSignal signal;
+#if defined(JANET_BSD) || defined(JANET_APPLE)
+    if (_setjmp(buf)) {
+#else
     if (setjmp(buf)) {
+#endif
         signal = JANET_SIGNAL_ERROR;
     } else {
         signal = run_vm(fiber, in, old_status);
@@ -916,6 +1197,36 @@ JanetSignal janet_pcall(
     return janet_continue(fiber, janet_wrap_nil(), out);
 }
 
+Janet janet_mcall(const char *name, int32_t argc, Janet *argv) {
+    /* At least 1 argument */
+    if (argc < 1) janet_panicf("method :%s expected at least 1 argument");
+    /* Find method */
+    Janet method;
+    if (janet_checktype(argv[0], JANET_ABSTRACT)) {
+        void *abst = janet_unwrap_abstract(argv[0]);
+        JanetAbstractType *type = (JanetAbstractType *)janet_abstract_type(abst);
+        if (!type->get || !(type->get)(abst, janet_ckeywordv(name), &method))
+            janet_panicf("abstract value %v does not implement :%s", argv[0], name);
+    } else if (janet_checktype(argv[0], JANET_TABLE)) {
+        JanetTable *table = janet_unwrap_table(argv[0]);
+        method = janet_table_get(table, janet_ckeywordv(name));
+    } else if (janet_checktype(argv[0], JANET_STRUCT)) {
+        const JanetKV *st = janet_unwrap_struct(argv[0]);
+        method = janet_struct_get(st, janet_ckeywordv(name));
+    } else {
+        janet_panicf("could not find method :%s for %v", name, argv[0]);
+    }
+    /* Invoke method */
+    if (janet_checktype(method, JANET_CFUNCTION)) {
+        return (janet_unwrap_cfunction(method))(argc, argv);
+    } else if (janet_checktype(method, JANET_FUNCTION)) {
+        JanetFunction *fun = janet_unwrap_function(method);
+        return janet_call(fun, argc, argv);
+    } else {
+        janet_panicf("method %s has unexpected value %v", name, method);
+    }
+}
+
 /* Setup VM */
 int janet_init(void) {
     /* Garbage collection */
@@ -938,6 +1249,14 @@ int janet_init(void) {
     /* Initialize registry */
     janet_vm_registry = janet_table(0);
     janet_gcroot(janet_wrap_table(janet_vm_registry));
+    /* Core env */
+    janet_vm_core_env = NULL;
+    /* Seed RNG */
+    janet_rng_seed(janet_default_rng(), 0);
+    /* Threads */
+#ifdef JANET_THREADS
+    janet_threads_init();
+#endif
     return 0;
 }
 
@@ -950,4 +1269,8 @@ void janet_deinit(void) {
     janet_vm_root_count = 0;
     janet_vm_root_capacity = 0;
     janet_vm_registry = NULL;
+    janet_vm_core_env = NULL;
+#ifdef JANET_THREADS
+    janet_threads_deinit();
+#endif
 }

src/include/janet.h

@@ -45,6 +45,23 @@ extern "C" {
  * detection for unsupported platforms
  */
 
+/* Check for any flavor of BSD (except apple) */
+#if defined(__FreeBSD__) || defined(__DragonFly__) || \
+    defined(__NetBSD__) || defined(__OpenBSD__)
+#define JANET_BSD 1
+#define _BSD_SOURCE 1
+#endif
+
+/* Check for Mac */
+#ifdef __APPLE__
+#define JANET_APPLE 1
+#endif
+
+/* Check for Linux */
+#ifdef __linux__
+#define JANET_LINUX 1
+#endif
+
 /* Check Unix */
 #if defined(_AIX) \
     || defined(__APPLE__) /* Darwin */ \
@@ -58,11 +75,8 @@ extern "C" {
     || defined(__QNXNTO__) \
     || defined(sun) || defined(__sun) /* Solaris */ \
     || defined(unix) || defined(__unix) || defined(__unix__)
-#define JANET_UNIX 1
-/* Enable certain posix features */
-#ifndef _POSIX_C_SOURCE
+#define JANET_POSIX 1
 #define _POSIX_C_SOURCE 200112L
-#endif
 #elif defined(__EMSCRIPTEN__)
 #define JANET_WEB 1
 #elif defined(WIN32) || defined(_WIN32)
@@ -71,7 +85,7 @@ extern "C" {
 
 /* Check 64-bit vs 32-bit */
 #if ((defined(__x86_64__) || defined(_M_X64)) \
-     && (defined(JANET_UNIX) || defined(JANET_WINDOWS))) \
+     && (defined(JANET_POSIX) || defined(JANET_WINDOWS))) \
     || (defined(_WIN64)) /* Windows 64 bit */ \
     || (defined(__ia64__) && defined(__LP64__)) /* Itanium in LP64 mode */ \
     || defined(__alpha__) /* DEC Alpha */ \
@@ -112,8 +126,10 @@ extern "C" {
 #define JANET_THREAD_LOCAL
 #elif defined(__GNUC__)
 #define JANET_THREAD_LOCAL __thread
+#define JANET_THREADS
 #elif defined(_MSC_BUILD)
 #define JANET_THREAD_LOCAL __declspec(thread)
+#define JANET_THREADS
 #else
 #define JANET_THREAD_LOCAL
 #endif
@@ -171,11 +187,10 @@ extern "C" {
 /* Maximum depth to follow table prototypes before giving up and returning nil. */
 #define JANET_MAX_MACRO_EXPAND 200
 
-/* Define max stack size for stacks before raising a stack overflow error.
- * If this is not defined, fiber stacks can grow without limit (until memory
- * runs out) */
+/* Define default max stack size for stacks before raising a stack overflow error.
+ * This can also be set on a per fiber basis. */
 #ifndef JANET_STACK_MAX
-#define JANET_STACK_MAX 16384
+#define JANET_STACK_MAX 0x7fffffff
 #endif
 
 /* Use nanboxed values - uses 8 bytes per value instead of 12 or 16.
@@ -229,9 +244,13 @@ typedef struct {
 
 /***** START SECTION TYPES *****/
 
+#ifdef JANET_WINDOWS
+// Must be defined before including stdlib.h
+#define _CRT_RAND_S
+#endif
+#include <stdlib.h>
 #include <stdint.h>
 #include <string.h>
-#include <stdlib.h>
 #include <stdarg.h>
 #include <setjmp.h>
 #include <stddef.h>
@@ -317,8 +336,17 @@ typedef struct JanetView JanetView;
 typedef struct JanetByteView JanetByteView;
 typedef struct JanetDictView JanetDictView;
 typedef struct JanetRange JanetRange;
+typedef struct JanetRNG JanetRNG;
 typedef Janet(*JanetCFunction)(int32_t argc, Janet *argv);
 
+/* String and other aliased pointer types */
+typedef const uint8_t *JanetString;
+typedef const uint8_t *JanetSymbol;
+typedef const uint8_t *JanetKeyword;
+typedef const Janet *JanetTuple;
+typedef const JanetKV *JanetStruct;
+typedef void *JanetAbstract;
+
 /* Basic types for all Janet Values */
 typedef enum JanetType {
     JANET_NUMBER,
@@ -649,6 +677,7 @@ struct Janet {
 JANET_API int janet_checkint(Janet x);
 JANET_API int janet_checkint64(Janet x);
 JANET_API int janet_checksize(Janet x);
+JANET_API JanetAbstract janet_checkabstract(Janet x, const JanetAbstractType *at);
 #define janet_checkintrange(x) ((x) == (int32_t)(x))
 #define janet_checkint64range(x) ((x) == (int64_t)(x))
 #define janet_unwrap_integer(x) ((int32_t) janet_unwrap_number(x))
@@ -756,8 +785,8 @@ struct JanetTupleHead {
     JanetGCObject gc;
     int32_t length;
     int32_t hash;
-    int32_t sm_start;
-    int32_t sm_end;
+    int32_t sm_line;
+    int32_t sm_column;
     const Janet data[];
 };
 
@@ -799,8 +828,8 @@ struct JanetAbstractHead {
 
 /* Source mapping structure for a bytecode instruction */
 struct JanetSourceMapping {
-    int32_t start;
-    int32_t end;
+    int32_t line;
+    int32_t column;
 };
 
 /* A function definition. Contains information needed to instantiate closures. */
@@ -813,8 +842,8 @@ struct JanetFuncDef {
 
     /* Various debug information */
     JanetSourceMapping *sourcemap;
-    const uint8_t *source;
-    const uint8_t *name;
+    JanetString source;
+    JanetString name;
 
     int32_t flags;
     int32_t slotcount; /* The amount of stack space required for the function */
@@ -870,7 +899,8 @@ struct JanetParser {
     size_t statecap;
     size_t bufcount;
     size_t bufcap;
-    size_t offset;
+    size_t line;
+    size_t column;
     size_t pending;
     int lookback;
     int flag;
@@ -881,6 +911,7 @@ typedef struct {
     void *u_state;
     int flags;
     const uint8_t *data;
+    const JanetAbstractType *at;
 } JanetMarshalContext;
 
 /* Defines an abstract type */
@@ -888,10 +919,10 @@ struct JanetAbstractType {
     const char *name;
     int (*gc)(void *data, size_t len);
     int (*gcmark)(void *data, size_t len);
-    Janet(*get)(void *data, Janet key);
+    int (*get)(void *data, Janet key, Janet *out);
     void (*put)(void *data, Janet key, Janet value);
     void (*marshal)(void *p, JanetMarshalContext *ctx);
-    void (*unmarshal)(void *p, JanetMarshalContext *ctx);
+    void *(*unmarshal)(JanetMarshalContext *ctx);
     void (*tostring)(void *p, JanetBuffer *buffer);
 };
 
@@ -927,6 +958,22 @@ struct JanetRange {
     int32_t end;
 };
 
+struct JanetRNG {
+    uint32_t a, b, c, d;
+    uint32_t counter;
+};
+
+/* Thread types */
+#ifdef JANET_THREADS
+typedef struct JanetThread JanetThread;
+typedef struct JanetMailbox JanetMailbox;
+struct JanetThread {
+    JanetMailbox *mailbox;
+    JanetTable *encode;
+};
+#endif
+
+
 /***** END SECTION TYPES *****/
 
 /***** START SECTION OPCODES *****/
@@ -1015,6 +1062,7 @@ enum JanetOpCode {
     JOP_RESUME,
     JOP_SIGNAL,
     JOP_PROPAGATE,
+    JOP_IN,
     JOP_GET,
     JOP_PUT,
     JOP_GET_INDEX,
@@ -1062,7 +1110,7 @@ enum JanetAssembleStatus {
 };
 struct JanetAssembleResult {
     JanetFuncDef *funcdef;
-    const uint8_t *error;
+    JanetString error;
     enum JanetAssembleStatus status;
 };
 JANET_API JanetAssembleResult janet_asm(Janet source, int flags);
@@ -1078,12 +1126,12 @@ enum JanetCompileStatus {
 };
 struct JanetCompileResult {
     JanetFuncDef *funcdef;
-    const uint8_t *error;
+    JanetString error;
     JanetFiber *macrofiber;
     JanetSourceMapping error_mapping;
     enum JanetCompileStatus status;
 };
-JANET_API JanetCompileResult janet_compile(Janet source, JanetTable *env, const uint8_t *where);
+JANET_API JanetCompileResult janet_compile(Janet source, JanetTable *env, JanetString where);
 
 /* Get the default environment for janet */
 JANET_API JanetTable *janet_core_env(JanetTable *replacements);
@@ -1101,7 +1149,13 @@ JANET_API void janet_debug_break(JanetFuncDef *def, int32_t pc);
 JANET_API void janet_debug_unbreak(JanetFuncDef *def, int32_t pc);
 JANET_API void janet_debug_find(
     JanetFuncDef **def_out, int32_t *pc_out,
-    const uint8_t *source, int32_t offset);
+    JanetString source, int32_t line, int32_t column);
+
+/* RNG */
+JANET_API JanetRNG *janet_default_rng(void);
+JANET_API void janet_rng_seed(JanetRNG *rng, uint32_t seed);
+JANET_API void janet_rng_longseed(JanetRNG *rng, const uint8_t *bytes, int32_t len);
+JANET_API uint32_t janet_rng_u32(JanetRNG *rng);
 
 /* Array functions */
 JANET_API JanetArray *janet_array(int32_t capacity);
@@ -1120,7 +1174,7 @@ JANET_API void janet_buffer_ensure(JanetBuffer *buffer, int32_t capacity, int32_
 JANET_API void janet_buffer_setcount(JanetBuffer *buffer, int32_t count);
 JANET_API void janet_buffer_extra(JanetBuffer *buffer, int32_t n);
 JANET_API void janet_buffer_push_bytes(JanetBuffer *buffer, const uint8_t *string, int32_t len);
-JANET_API void janet_buffer_push_string(JanetBuffer *buffer, const uint8_t *string);
+JANET_API void janet_buffer_push_string(JanetBuffer *buffer, JanetString string);
 JANET_API void janet_buffer_push_cstring(JanetBuffer *buffer, const char *cstring);
 JANET_API void janet_buffer_push_u8(JanetBuffer *buffer, uint8_t x);
 JANET_API void janet_buffer_push_u16(JanetBuffer *buffer, uint16_t x);
@@ -1134,39 +1188,39 @@ JANET_API void janet_buffer_push_u64(JanetBuffer *buffer, uint64_t x);
 #define janet_tuple_head(t) ((JanetTupleHead *)((char *)t - offsetof(JanetTupleHead, data)))
 #define janet_tuple_length(t) (janet_tuple_head(t)->length)
 #define janet_tuple_hash(t) (janet_tuple_head(t)->hash)
-#define janet_tuple_sm_start(t) (janet_tuple_head(t)->sm_start)
-#define janet_tuple_sm_end(t) (janet_tuple_head(t)->sm_end)
+#define janet_tuple_sm_line(t) (janet_tuple_head(t)->sm_line)
+#define janet_tuple_sm_column(t) (janet_tuple_head(t)->sm_column)
 #define janet_tuple_flag(t) (janet_tuple_head(t)->gc.flags)
 JANET_API Janet *janet_tuple_begin(int32_t length);
-JANET_API const Janet *janet_tuple_end(Janet *tuple);
-JANET_API const Janet *janet_tuple_n(const Janet *values, int32_t n);
-JANET_API int janet_tuple_equal(const Janet *lhs, const Janet *rhs);
-JANET_API int janet_tuple_compare(const Janet *lhs, const Janet *rhs);
+JANET_API JanetTuple janet_tuple_end(Janet *tuple);
+JANET_API JanetTuple janet_tuple_n(const Janet *values, int32_t n);
+JANET_API int janet_tuple_equal(JanetTuple lhs, JanetTuple rhs);
+JANET_API int janet_tuple_compare(JanetTuple lhs, JanetTuple rhs);
 
 /* String/Symbol functions */
 #define janet_string_head(s) ((JanetStringHead *)((char *)s - offsetof(JanetStringHead, data)))
 #define janet_string_length(s) (janet_string_head(s)->length)
 #define janet_string_hash(s) (janet_string_head(s)->hash)
 JANET_API uint8_t *janet_string_begin(int32_t length);
-JANET_API const uint8_t *janet_string_end(uint8_t *str);
-JANET_API const uint8_t *janet_string(const uint8_t *buf, int32_t len);
-JANET_API const uint8_t *janet_cstring(const char *cstring);
-JANET_API int janet_string_compare(const uint8_t *lhs, const uint8_t *rhs);
-JANET_API int janet_string_equal(const uint8_t *lhs, const uint8_t *rhs);
-JANET_API int janet_string_equalconst(const uint8_t *lhs, const uint8_t *rhs, int32_t rlen, int32_t rhash);
-JANET_API const uint8_t *janet_description(Janet x);
-JANET_API const uint8_t *janet_to_string(Janet x);
+JANET_API JanetString janet_string_end(uint8_t *str);
+JANET_API JanetString janet_string(const uint8_t *buf, int32_t len);
+JANET_API JanetString janet_cstring(const char *cstring);
+JANET_API int janet_string_compare(JanetString lhs, JanetString rhs);
+JANET_API int janet_string_equal(JanetString lhs, JanetString rhs);
+JANET_API int janet_string_equalconst(JanetString lhs, const uint8_t *rhs, int32_t rlen, int32_t rhash);
+JANET_API JanetString janet_description(Janet x);
+JANET_API JanetString janet_to_string(Janet x);
 JANET_API void janet_to_string_b(JanetBuffer *buffer, Janet x);
 JANET_API void janet_description_b(JanetBuffer *buffer, Janet x);
 #define janet_cstringv(cstr) janet_wrap_string(janet_cstring(cstr))
 #define janet_stringv(str, len) janet_wrap_string(janet_string((str), (len)))
-JANET_API const uint8_t *janet_formatc(const char *format, ...);
+JANET_API JanetString janet_formatc(const char *format, ...);
 JANET_API void janet_formatb(JanetBuffer *bufp, const char *format, va_list args);
 
 /* Symbol functions */
-JANET_API const uint8_t *janet_symbol(const uint8_t *str, int32_t len);
-JANET_API const uint8_t *janet_csymbol(const char *str);
-JANET_API const uint8_t *janet_symbol_gen(void);
+JANET_API JanetSymbol janet_symbol(const uint8_t *str, int32_t len);
+JANET_API JanetSymbol janet_csymbol(const char *str);
+JANET_API JanetSymbol janet_symbol_gen(void);
 #define janet_symbolv(str, len) janet_wrap_symbol(janet_symbol((str), (len)))
 #define janet_csymbolv(cstr) janet_wrap_symbol(janet_csymbol(cstr))
 
@@ -1183,24 +1237,25 @@ JANET_API const uint8_t *janet_symbol_gen(void);
 #define janet_struct_hash(t) (janet_struct_head(t)->hash)
 JANET_API JanetKV *janet_struct_begin(int32_t count);
 JANET_API void janet_struct_put(JanetKV *st, Janet key, Janet value);
-JANET_API const JanetKV *janet_struct_end(JanetKV *st);
-JANET_API Janet janet_struct_get(const JanetKV *st, Janet key);
-JANET_API JanetTable *janet_struct_to_table(const JanetKV *st);
-JANET_API int janet_struct_equal(const JanetKV *lhs, const JanetKV *rhs);
-JANET_API int janet_struct_compare(const JanetKV *lhs, const JanetKV *rhs);
-JANET_API const JanetKV *janet_struct_find(const JanetKV *st, Janet key);
+JANET_API JanetStruct janet_struct_end(JanetKV *st);
+JANET_API Janet janet_struct_get(JanetStruct st, Janet key);
+JANET_API JanetTable *janet_struct_to_table(JanetStruct st);
+JANET_API int janet_struct_equal(JanetStruct lhs, JanetStruct rhs);
+JANET_API int janet_struct_compare(JanetStruct lhs, JanetStruct rhs);
+JANET_API const JanetKV *janet_struct_find(JanetStruct st, Janet key);
 
 /* Table functions */
 JANET_API JanetTable *janet_table(int32_t capacity);
 JANET_API JanetTable *janet_table_init(JanetTable *table, int32_t capacity);
 JANET_API void janet_table_deinit(JanetTable *table);
 JANET_API Janet janet_table_get(JanetTable *t, Janet key);
+JANET_API Janet janet_table_get_ex(JanetTable *t, Janet key, JanetTable **which);
 JANET_API Janet janet_table_rawget(JanetTable *t, Janet key);
 JANET_API Janet janet_table_remove(JanetTable *t, Janet key);
 JANET_API void janet_table_put(JanetTable *t, Janet key, Janet value);
-JANET_API const JanetKV *janet_table_to_struct(JanetTable *t);
+JANET_API JanetStruct janet_table_to_struct(JanetTable *t);
 JANET_API void janet_table_merge_table(JanetTable *table, JanetTable *other);
-JANET_API void janet_table_merge_struct(JanetTable *table, const JanetKV *other);
+JANET_API void janet_table_merge_struct(JanetTable *table, JanetStruct other);
 JANET_API JanetKV *janet_table_find(JanetTable *t, Janet key);
 JANET_API JanetTable *janet_table_clone(JanetTable *table);
 
@@ -1222,13 +1277,13 @@ JANET_API const JanetKV *janet_dictionary_next(const JanetKV *kvs, int32_t cap,
 #define janet_abstract_type(u) (janet_abstract_head(u)->type)
 #define janet_abstract_size(u) (janet_abstract_head(u)->size)
 JANET_API void *janet_abstract_begin(const JanetAbstractType *type, size_t size);
-JANET_API void *janet_abstract_end(void *);
-JANET_API void *janet_abstract(const JanetAbstractType *type, size_t size); /* begin and end in one call */
+JANET_API JanetAbstract janet_abstract_end(void *abstractTemplate);
+JANET_API JanetAbstract janet_abstract(const JanetAbstractType *type, size_t size); /* begin and end in one call */
 
 /* Native */
 typedef void (*JanetModule)(JanetTable *);
 typedef JanetBuildConfig(*JanetModconf)(void);
-JANET_API JanetModule janet_native(const char *name, const uint8_t **error);
+JANET_API JanetModule janet_native(const char *name, JanetString *error);
 
 /* Marshaling */
 JANET_API void janet_marshal(
@@ -1263,33 +1318,42 @@ JANET_API int janet_verify(JanetFuncDef *def);
 
 /* Pretty printing */
 #define JANET_PRETTY_COLOR 1
+#define JANET_PRETTY_ONELINE 2
 JANET_API JanetBuffer *janet_pretty(JanetBuffer *buffer, int depth, int flags, Janet x);
 
 /* Misc */
 JANET_API int janet_equals(Janet x, Janet y);
 JANET_API int32_t janet_hash(Janet x);
 JANET_API int janet_compare(Janet x, Janet y);
-JANET_API int janet_cstrcmp(const uint8_t *str, const char *other);
+JANET_API int janet_cstrcmp(JanetString str, const char *other);
+JANET_API Janet janet_in(Janet ds, Janet key);
 JANET_API Janet janet_get(Janet ds, Janet key);
 JANET_API Janet janet_getindex(Janet ds, int32_t index);
 JANET_API int32_t janet_length(Janet x);
+JANET_API Janet janet_lengthv(Janet x);
 JANET_API void janet_put(Janet ds, Janet key, Janet value);
 JANET_API void janet_putindex(Janet ds, int32_t index, Janet value);
-JANET_API uint64_t janet_getflags(const Janet *argv, int32_t n, const char *flags);
 #define janet_flag_at(F, I) ((F) & ((1ULL) << (I)))
 JANET_API Janet janet_wrap_number_safe(double x);
+JANET_API int janet_keyeq(Janet x, const char *cstring);
+JANET_API int janet_streq(Janet x, const char *cstring);
+JANET_API int janet_symeq(Janet x, const char *cstring);
 
 /* VM functions */
 JANET_API int janet_init(void);
 JANET_API void janet_deinit(void);
 JANET_API JanetSignal janet_continue(JanetFiber *fiber, Janet in, Janet *out);
 JANET_API JanetSignal janet_pcall(JanetFunction *fun, int32_t argn, const Janet *argv, Janet *out, JanetFiber **f);
+JANET_API JanetSignal janet_step(JanetFiber *fiber, Janet in, Janet *out);
 JANET_API Janet janet_call(JanetFunction *fun, int32_t argc, const Janet *argv);
+JANET_API Janet janet_mcall(const char *name, int32_t argc, Janet *argv);
 JANET_API void janet_stacktrace(JanetFiber *fiber, Janet err);
 
 /* Scratch Memory API */
+typedef void (*ScratchFinalizer)(void *);
 JANET_API void *janet_smalloc(size_t size);
 JANET_API void *janet_srealloc(void *mem, size_t size);
+JANET_API void janet_sfinalizer(void *mem, ScratchFinalizer finalizer);
 JANET_API void janet_sfree(void *mem);
 
 /* C Library helpers */
@@ -1302,9 +1366,12 @@ typedef enum {
 JANET_API void janet_def(JanetTable *env, const char *name, Janet val, const char *documentation);
 JANET_API void janet_var(JanetTable *env, const char *name, Janet val, const char *documentation);
 JANET_API void janet_cfuns(JanetTable *env, const char *regprefix, const JanetReg *cfuns);
-JANET_API JanetBindingType janet_resolve(JanetTable *env, const uint8_t *sym, Janet *out);
+JANET_API JanetBindingType janet_resolve(JanetTable *env, JanetSymbol sym, Janet *out);
 JANET_API void janet_register(const char *name, JanetCFunction cfun);
 
+/* Get values from the core environment. */
+JANET_API Janet janet_resolve_core(const char *name);
+
 /* New C API */
 
 /* Allow setting entry name for static libraries */
@@ -1320,24 +1387,27 @@ JANET_API void janet_register(const char *name, JanetCFunction cfun);
 
 JANET_NO_RETURN JANET_API void janet_panicv(Janet message);
 JANET_NO_RETURN JANET_API void janet_panic(const char *message);
-JANET_NO_RETURN JANET_API void janet_panics(const uint8_t *message);
+JANET_NO_RETURN JANET_API void janet_panics(JanetString message);
 JANET_NO_RETURN JANET_API void janet_panicf(const char *format, ...);
-JANET_API void janet_printf(const char *format, ...);
+JANET_API void janet_dynprintf(const char *name, FILE *dflt_file, const char *format, ...);
+#define janet_printf(...) janet_dynprintf("out", stdout, __VA_ARGS__)
+#define janet_eprintf(...) janet_dynprintf("err", stderr, __VA_ARGS__)
 JANET_NO_RETURN JANET_API void janet_panic_type(Janet x, int32_t n, int expected);
 JANET_NO_RETURN JANET_API void janet_panic_abstract(Janet x, int32_t n, const JanetAbstractType *at);
 JANET_API void janet_arity(int32_t arity, int32_t min, int32_t max);
 JANET_API void janet_fixarity(int32_t arity, int32_t fix);
 
-JANET_API Janet janet_getmethod(const uint8_t *method, const JanetMethod *methods);
+JANET_API int janet_getmethod(JanetKeyword method, const JanetMethod *methods, Janet *out);
+
 JANET_API double janet_getnumber(const Janet *argv, int32_t n);
 JANET_API JanetArray *janet_getarray(const Janet *argv, int32_t n);
-JANET_API const Janet *janet_gettuple(const Janet *argv, int32_t n);
+JANET_API JanetTuple janet_gettuple(const Janet *argv, int32_t n);
 JANET_API JanetTable *janet_gettable(const Janet *argv, int32_t n);
-JANET_API const JanetKV *janet_getstruct(const Janet *argv, int32_t n);
-JANET_API const uint8_t *janet_getstring(const Janet *argv, int32_t n);
+JANET_API JanetStruct janet_getstruct(const Janet *argv, int32_t n);
+JANET_API JanetString janet_getstring(const Janet *argv, int32_t n);
 JANET_API const char *janet_getcstring(const Janet *argv, int32_t n);
-JANET_API const uint8_t *janet_getsymbol(const Janet *argv, int32_t n);
-JANET_API const uint8_t *janet_getkeyword(const Janet *argv, int32_t n);
+JANET_API JanetSymbol janet_getsymbol(const Janet *argv, int32_t n);
+JANET_API JanetKeyword janet_getkeyword(const Janet *argv, int32_t n);
 JANET_API JanetBuffer *janet_getbuffer(const Janet *argv, int32_t n);
 JANET_API JanetFiber *janet_getfiber(const Janet *argv, int32_t n);
 JANET_API JanetFunction *janet_getfunction(const Janet *argv, int32_t n);
@@ -1345,6 +1415,7 @@ JANET_API JanetCFunction janet_getcfunction(const Janet *argv, int32_t n);
 JANET_API int janet_getboolean(const Janet *argv, int32_t n);
 JANET_API void *janet_getpointer(const Janet *argv, int32_t n);
 
+JANET_API int32_t janet_getnat(const Janet *argv, int32_t n);
 JANET_API int32_t janet_getinteger(const Janet *argv, int32_t n);
 JANET_API int64_t janet_getinteger64(const Janet *argv, int32_t n);
 JANET_API size_t janet_getsize(const Janet *argv, int32_t n);
@@ -1355,10 +1426,45 @@ JANET_API void *janet_getabstract(const Janet *argv, int32_t n, const JanetAbstr
 JANET_API JanetRange janet_getslice(int32_t argc, const Janet *argv);
 JANET_API int32_t janet_gethalfrange(const Janet *argv, int32_t n, int32_t length, const char *which);
 JANET_API int32_t janet_getargindex(const Janet *argv, int32_t n, int32_t length, const char *which);
+JANET_API uint64_t janet_getflags(const Janet *argv, int32_t n, const char *flags);
+
+/* Optionals */
+JANET_API double janet_optnumber(const Janet *argv, int32_t argc, int32_t n, double dflt);
+JANET_API JanetTuple janet_opttuple(const Janet *argv, int32_t argc, int32_t n, JanetTuple dflt);
+JANET_API JanetStruct janet_optstruct(const Janet *argv, int32_t argc, int32_t n, JanetStruct dflt);
+JANET_API JanetString janet_optstring(const Janet *argv, int32_t argc, int32_t n, JanetString dflt);
+JANET_API const char *janet_optcstring(const Janet *argv, int32_t argc, int32_t n, const char *dflt);
+JANET_API JanetSymbol janet_optsymbol(const Janet *argv, int32_t argc, int32_t n, JanetString dflt);
+JANET_API JanetKeyword janet_optkeyword(const Janet *argv, int32_t argc, int32_t n, JanetString dflt);
+JANET_API JanetFiber *janet_optfiber(const Janet *argv, int32_t argc, int32_t n, JanetFiber *dflt);
+JANET_API JanetFunction *janet_optfunction(const Janet *argv, int32_t argc, int32_t n, JanetFunction *dflt);
+JANET_API JanetCFunction janet_optcfunction(const Janet *argv, int32_t argc, int32_t n, JanetCFunction dflt);
+JANET_API int janet_optboolean(const Janet *argv, int32_t argc, int32_t n, int dflt);
+JANET_API void *janet_optpointer(const Janet *argv, int32_t argc, int32_t n, void *dflt);
+JANET_API int32_t janet_optnat(const Janet *argv, int32_t argc, int32_t n, int32_t dflt);
+JANET_API int32_t janet_optinteger(const Janet *argv, int32_t argc, int32_t n, int32_t dflt);
+JANET_API int64_t janet_optinteger64(const Janet *argv, int32_t argc, int32_t n, int64_t dflt);
+JANET_API size_t janet_optsize(const Janet *argv, int32_t argc, int32_t n, size_t dflt);
+JANET_API JanetAbstract janet_optabstract(const Janet *argv, int32_t argc, int32_t n, const JanetAbstractType *at, JanetAbstract dflt);
+
+/* Mutable optional types specify a size default, and construct a new value if none is provided */
+JANET_API JanetBuffer *janet_optbuffer(const Janet *argv, int32_t argc, int32_t n, int32_t dflt_len);
+JANET_API JanetTable *janet_opttable(const Janet *argv, int32_t argc, int32_t n, int32_t dflt_len);
+JANET_API JanetArray *janet_optarray(const Janet *argv, int32_t argc, int32_t n, int32_t dflt_len);
 
 JANET_API Janet janet_dyn(const char *name);
 JANET_API void janet_setdyn(const char *name, Janet value);
 
+#define JANET_FILE_WRITE 1
+#define JANET_FILE_READ 2
+#define JANET_FILE_APPEND 4
+#define JANET_FILE_UPDATE 8
+#define JANET_FILE_NOT_CLOSEABLE 16
+#define JANET_FILE_CLOSED 32
+#define JANET_FILE_BINARY 64
+#define JANET_FILE_SERIALIZABLE 128
+#define JANET_FILE_PIPED 256
+
 JANET_API FILE *janet_getfile(const Janet *argv, int32_t n, int *flags);
 JANET_API FILE *janet_dynfile(const char *name, FILE *def);
 
@@ -1369,13 +1475,16 @@ JANET_API void janet_marshal_int64(JanetMarshalContext *ctx, int64_t value);
 JANET_API void janet_marshal_byte(JanetMarshalContext *ctx, uint8_t value);
 JANET_API void janet_marshal_bytes(JanetMarshalContext *ctx, const uint8_t *bytes, size_t len);
 JANET_API void janet_marshal_janet(JanetMarshalContext *ctx, Janet x);
+JANET_API void janet_marshal_abstract(JanetMarshalContext *ctx, JanetAbstract abstract);
 
+JANET_API void janet_unmarshal_ensure(JanetMarshalContext *ctx, size_t size);
 JANET_API size_t janet_unmarshal_size(JanetMarshalContext *ctx);
 JANET_API int32_t janet_unmarshal_int(JanetMarshalContext *ctx);
 JANET_API int64_t janet_unmarshal_int64(JanetMarshalContext *ctx);
 JANET_API uint8_t janet_unmarshal_byte(JanetMarshalContext *ctx);
 JANET_API void janet_unmarshal_bytes(JanetMarshalContext *ctx, uint8_t *dest, size_t len);
 JANET_API Janet janet_unmarshal_janet(JanetMarshalContext *ctx);
+JANET_API JanetAbstract janet_unmarshal_abstract(JanetMarshalContext *ctx, size_t size);
 
 JANET_API void janet_register_abstract_type(const JanetAbstractType *at);
 JANET_API const JanetAbstractType *janet_get_abstract_type(Janet key);

src/mainclient/init.janet

@@ -1,95 +0,0 @@
-# Copyright 2017-2019 (C) Calvin Rose
-
-(do
-
-  (var *should-repl* false)
-  (var *no-file* true)
-  (var *quiet* false)
-  (var *raw-stdin* false)
-  (var *handleopts* true)
-  (var *exit-on-error* true)
-  (var *colorize* true)
-  (var *compile-only* false)
-
-  (if-let [jp (os/getenv "JANET_PATH")] (setdyn :syspath jp))
-  (if-let [jp (os/getenv "JANET_HEADERPATH")] (setdyn :headerpath jp))
-  (def args (dyn :args))
-
-  # Flag handlers
-  (def handlers :private
-    {"h" (fn [&]
-           (print "usage: " (get args 0) " [options] script args...")
-           (print
-             `Options are:
-  -h : Show this help
-  -v : Print the version string
-  -s : Use raw stdin instead of getline like functionality
-  -e code : Execute a string of janet
-  -r : Enter the repl after running all scripts
-  -p : Keep on executing if there is a top level error (persistent)
-  -q : Hide prompt, logo, and repl output (quiet)
-  -k : Compile scripts but do not execute
-  -m syspath : Set system path for loading global modules
-  -c source output : Compile janet source code into an image
-  -n : Disable ANSI color output in the repl
-  -l path : Execute code in a file before running the main script
-  -- : Stop handling options`)
-           (os/exit 0)
-           1)
-     "v" (fn [&] (print janet/version "-" janet/build) (os/exit 0) 1)
-     "s" (fn [&] (set *raw-stdin* true) (set *should-repl* true) 1)
-     "r" (fn [&] (set *should-repl* true) 1)
-     "p" (fn [&] (set *exit-on-error* false) 1)
-     "q" (fn [&] (set *quiet* true) 1)
-     "k" (fn [&] (set *compile-only* true) (set *exit-on-error* false) 1)
-     "n" (fn [&] (set *colorize* false) 1)
-     "m" (fn [i &] (setdyn :syspath (get args (+ i 1))) 2)
-     "c" (fn [i &]
-           (def e (dofile (get args (+ i 1))))
-           (spit (get args (+ i 2)) (make-image e))
-           (set *no-file* false)
-           3)
-     "-" (fn [&] (set *handleopts* false) 1)
-     "l" (fn [i &]
-           (import* (get args (+ i 1))
-                    :prefix "" :exit *exit-on-error*)
-           2)
-     "e" (fn [i &]
-           (set *no-file* false)
-           (eval-string (get args (+ i 1)))
-           2)})
-
-  (defn- dohandler [n i &]
-    (def h (get handlers n))
-    (if h (h i) (do (print "unknown flag -" n) ((get handlers "h")))))
-
-  # Process arguments
-  (var i 0)
-  (def lenargs (length args))
-  (while (< i lenargs)
-    (def arg (get args i))
-    (if (and *handleopts* (= "-" (string/slice arg 0 1)))
-      (+= i (dohandler (string/slice arg 1 2) i))
-      (do
-        (set *no-file* false)
-        (dofile arg :prefix "" :exit *exit-on-error* :compile-only *compile-only*)
-        (set i lenargs))))
-
-  (when (and (not *compile-only*) (or *should-repl* *no-file*))
-    (if-not *quiet*
-      (print "Janet " janet/version "-" janet/build "  Copyright (C) 2017-2019 Calvin Rose"))
-    (defn noprompt [_] "")
-    (defn getprompt [p]
-      (def offset (parser/where p))
-      (string "janet:" offset ":" (parser/state p :delimiters) "> "))
-    (def prompter (if *quiet* noprompt getprompt))
-    (defn getstdin [prompt buf]
-      (file/write stdout prompt)
-      (file/flush stdout)
-      (file/read stdin :line buf))
-    (def getter (if *raw-stdin* getstdin getline))
-    (defn getchunk [buf p]
-      (getter (prompter p) buf))
-    (def onsig (if *quiet* (fn [x &] x) nil))
-    (setdyn :pretty-format (if *colorize* "%.20P" "%.20p"))
-    (repl getchunk onsig)))

src/mainclient/line.c

@@ -20,7 +20,9 @@
 * IN THE SOFTWARE.
 */
 
+#ifndef JANET_AMALG
 #include "line.h"
+#endif
 
 /* Common */
 Janet janet_line_getter(int32_t argc, Janet *argv) {
@@ -87,18 +89,18 @@ https://github.com/antirez/linenoise/blob/master/linenoise.c
 /* static state */
 #define JANET_LINE_MAX 1024
 #define JANET_HISTORY_MAX 100
-static int israwmode = 0;
-static const char *prompt = "> ";
-static int plen = 2;
-static char buf[JANET_LINE_MAX];
-static int len = 0;
-static int pos = 0;
-static int cols = 80;
-static char *history[JANET_HISTORY_MAX];
-static int history_count = 0;
-static int historyi = 0;
-static int sigint_flag = 0;
-static struct termios termios_start;
+static JANET_THREAD_LOCAL int gbl_israwmode = 0;
+static JANET_THREAD_LOCAL const char *gbl_prompt = "> ";
+static JANET_THREAD_LOCAL int gbl_plen = 2;
+static JANET_THREAD_LOCAL char gbl_buf[JANET_LINE_MAX];
+static JANET_THREAD_LOCAL int gbl_len = 0;
+static JANET_THREAD_LOCAL int gbl_pos = 0;
+static JANET_THREAD_LOCAL int gbl_cols = 80;
+static JANET_THREAD_LOCAL char *gbl_history[JANET_HISTORY_MAX];
+static JANET_THREAD_LOCAL int gbl_history_count = 0;
+static JANET_THREAD_LOCAL int gbl_historyi = 0;
+static JANET_THREAD_LOCAL int gbl_sigint_flag = 0;
+static JANET_THREAD_LOCAL struct termios gbl_termios_start;
 
 /* Unsupported terminal list from linenoise */
 static const char *badterms[] = {
@@ -121,16 +123,15 @@ static char *sdup(const char *s) {
 static int rawmode() {
     struct termios t;
     if (!isatty(STDIN_FILENO)) goto fatal;
-    if (tcgetattr(STDIN_FILENO, &termios_start) == -1) goto fatal;
-    t = termios_start;
+    if (tcgetattr(STDIN_FILENO, &gbl_termios_start) == -1) goto fatal;
+    t = gbl_termios_start;
     t.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
-    t.c_oflag &= ~(OPOST);
     t.c_cflag |= (CS8);
     t.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
     t.c_cc[VMIN] = 1;
     t.c_cc[VTIME] = 0;
     if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &t) < 0) goto fatal;
-    israwmode = 1;
+    gbl_israwmode = 1;
     return 0;
 fatal:
     errno = ENOTTY;
@@ -139,8 +140,8 @@ fatal:
 
 /* Disable raw mode */
 static void norawmode() {
-    if (israwmode && tcsetattr(STDIN_FILENO, TCSAFLUSH, &termios_start) != -1)
-        israwmode = 0;
+    if (gbl_israwmode && tcsetattr(STDIN_FILENO, TCSAFLUSH, &gbl_termios_start) != -1)
+        gbl_israwmode = 0;
 }
 
 static int curpos() {
@@ -171,7 +172,9 @@ static int getcols() {
         if (cols > start) {
             char seq[32];
             snprintf(seq, 32, "\x1b[%dD", cols - start);
-            if (write(STDOUT_FILENO, seq, strlen(seq)) == -1) {}
+            if (write(STDOUT_FILENO, seq, strlen(seq)) == -1) {
+                exit(1);
+            }
         }
         return cols;
     } else {
@@ -182,7 +185,9 @@ failed:
 }
 
 static void clear() {
-    if (write(STDOUT_FILENO, "\x1b[H\x1b[2J", 7) <= 0) {}
+    if (write(STDOUT_FILENO, "\x1b[H\x1b[2J", 7) <= 0) {
+        exit(1);
+    }
 }
 
 static void refresh() {
@@ -190,38 +195,40 @@ static void refresh() {
     JanetBuffer b;
 
     /* Keep cursor position on screen */
-    char *_buf = buf;
-    int _len = len;
-    int _pos = pos;
-    while ((plen + _pos) >= cols) {
+    char *_buf = gbl_buf;
+    int _len = gbl_len;
+    int _pos = gbl_pos;
+    while ((gbl_plen + _pos) >= gbl_cols) {
         _buf++;
         _len--;
         _pos--;
     }
-    while ((plen + _len) > cols) {
+    while ((gbl_plen + _len) > gbl_cols) {
         _len--;
     }
 
     janet_buffer_init(&b, 0);
-    /* Cursor to left edge, prompt and buffer */
+    /* Cursor to left edge, gbl_prompt and buffer */
     janet_buffer_push_u8(&b, '\r');
-    janet_buffer_push_cstring(&b, prompt);
+    janet_buffer_push_cstring(&b, gbl_prompt);
     janet_buffer_push_bytes(&b, (uint8_t *) _buf, _len);
     /* Erase to right */
     janet_buffer_push_cstring(&b, "\x1b[0K");
     /* Move cursor to original position. */
-    snprintf(seq, 64, "\r\x1b[%dC", (int)(_pos + plen));
+    snprintf(seq, 64, "\r\x1b[%dC", (int)(_pos + gbl_plen));
     janet_buffer_push_cstring(&b, seq);
-    if (write(STDOUT_FILENO, b.data, b.count) == -1) {}
+    if (write(STDOUT_FILENO, b.data, b.count) == -1) {
+        exit(1);
+    }
     janet_buffer_deinit(&b);
 }
 
 static int insert(char c) {
-    if (len < JANET_LINE_MAX - 1) {
-        if (len == pos) {
-            buf[pos++] = c;
-            buf[++len] = '\0';
-            if (plen + len < cols) {
+    if (gbl_len < JANET_LINE_MAX - 1) {
+        if (gbl_len == gbl_pos) {
+            gbl_buf[gbl_pos++] = c;
+            gbl_buf[++gbl_len] = '\0';
+            if (gbl_plen + gbl_len < gbl_cols) {
                 /* Avoid a full update of the line in the
                  * trivial case. */
                 if (write(STDOUT_FILENO, &c, 1) == -1) return -1;
@@ -229,9 +236,9 @@ static int insert(char c) {
                 refresh();
             }
         } else {
-            memmove(buf + pos + 1, buf + pos, len - pos);
-            buf[pos++] = c;
-            buf[++len] = '\0';
+            memmove(gbl_buf + gbl_pos + 1, gbl_buf + gbl_pos, gbl_len - gbl_pos);
+            gbl_buf[gbl_pos++] = c;
+            gbl_buf[++gbl_len] = '\0';
             refresh();
         }
     }
@@ -239,21 +246,21 @@ static int insert(char c) {
 }
 
 static void historymove(int delta) {
-    if (history_count > 1) {
-        free(history[historyi]);
-        history[historyi] = sdup(buf);
+    if (gbl_history_count > 1) {
+        free(gbl_history[gbl_historyi]);
+        gbl_history[gbl_historyi] = sdup(gbl_buf);
 
-        historyi += delta;
-        if (historyi < 0) {
-            historyi = 0;
+        gbl_historyi += delta;
+        if (gbl_historyi < 0) {
+            gbl_historyi = 0;
             return;
-        } else if (historyi >= history_count) {
-            historyi = history_count - 1;
+        } else if (gbl_historyi >= gbl_history_count) {
+            gbl_historyi = gbl_history_count - 1;
             return;
         }
-        strncpy(buf, history[historyi], JANET_LINE_MAX - 1);
-        pos = len = strlen(buf);
-        buf[len] = '\0';
+        strncpy(gbl_buf, gbl_history[gbl_historyi], JANET_LINE_MAX - 1);
+        gbl_pos = gbl_len = strlen(gbl_buf);
+        gbl_buf[gbl_len] = '\0';
 
         refresh();
     }
@@ -261,62 +268,70 @@ static void historymove(int delta) {
 
 static void addhistory() {
     int i, len;
-    char *newline = sdup(buf);
+    char *newline = sdup(gbl_buf);
     if (!newline) return;
-    len = history_count;
+    len = gbl_history_count;
     if (len < JANET_HISTORY_MAX) {
-        history[history_count++] = newline;
+        gbl_history[gbl_history_count++] = newline;
         len++;
     } else {
-        free(history[JANET_HISTORY_MAX - 1]);
+        free(gbl_history[JANET_HISTORY_MAX - 1]);
     }
     for (i = len - 1; i > 0; i--) {
-        history[i] = history[i - 1];
+        gbl_history[i] = gbl_history[i - 1];
     }
-    history[0] = newline;
+    gbl_history[0] = newline;
 }
 
 static void replacehistory() {
-    char *newline = sdup(buf);
+    char *newline = sdup(gbl_buf);
     if (!newline) return;
-    free(history[0]);
-    history[0] = newline;
+    free(gbl_history[0]);
+    gbl_history[0] = newline;
 }
 
 static void kleft() {
-    if (pos > 0) {
-        pos--;
+    if (gbl_pos > 0) {
+        gbl_pos--;
         refresh();
     }
 }
 
 static void kright() {
-    if (pos != len) {
-        pos++;
+    if (gbl_pos != gbl_len) {
+        gbl_pos++;
         refresh();
     }
 }
 
 static void kbackspace() {
-    if (pos > 0) {
-        memmove(buf + pos - 1, buf + pos, len - pos);
-        pos--;
-        buf[--len] = '\0';
+    if (gbl_pos > 0) {
+        memmove(gbl_buf + gbl_pos - 1, gbl_buf + gbl_pos, gbl_len - gbl_pos);
+        gbl_pos--;
+        gbl_buf[--gbl_len] = '\0';
+        refresh();
+    }
+}
+
+static void kdelete() {
+    if (gbl_pos != gbl_len) {
+        memmove(gbl_buf + gbl_pos, gbl_buf + gbl_pos + 1, gbl_len - gbl_pos);
+        gbl_buf[--gbl_len] = '\0';
         refresh();
     }
 }
 
 static int line() {
-    cols = getcols();
-    plen = 0;
-    len = 0;
-    pos = 0;
-    while (prompt[plen]) plen++;
-    buf[0] = '\0';
+    gbl_cols = getcols();
+    gbl_plen = 0;
+    gbl_len = 0;
+    gbl_pos = 0;
+    while (gbl_prompt[gbl_plen]) gbl_plen++;
+    gbl_buf[0] = '\0';
 
     addhistory();
 
-    if (write(STDOUT_FILENO, prompt, plen) == -1) return -1;
+    if (write(STDOUT_FILENO, gbl_prompt, gbl_plen) == -1) return -1;
     for (;;) {
         char c;
         int nread;
@@ -337,7 +352,7 @@ static int line() {
                 return 0;
             case 3:     /* ctrl-c */
                 errno = EAGAIN;
-                sigint_flag = 1;
+                gbl_sigint_flag = 1;
                 return -1;
             case 127:   /* backspace */
             case 8:     /* ctrl-h */
@@ -352,8 +367,8 @@ static int line() {
                 kright();
                 break;
             case 21:
-                buf[0] = '\0';
-                pos = len = 0;
+                gbl_buf[0] = '\0';
+                gbl_pos = gbl_len = 0;
                 refresh();
                 break;
             case 26: /* ctrl-z */
@@ -378,6 +393,9 @@ static int line() {
                         if (read(STDIN_FILENO, seq + 2, 1) == -1) break;
                         if (seq[2] == '~') {
                             switch (seq[1]) {
+                                case '3': /* delete */
+                                    kdelete();
+                                    break;
                                 default:
                                     break;
                             }
@@ -399,11 +417,11 @@ static int line() {
                                 kleft();
                                 break;
                             case 'H':
-                                pos = 0;
+                                gbl_pos = 0;
                                 refresh();
                                 break;
                             case 'F':
-                                pos = len;
+                                gbl_pos = gbl_len;
                                 refresh();
                                 break;
                         }
@@ -413,11 +431,11 @@ static int line() {
                         default:
                             break;
                         case 'H':
-                            pos = 0;
+                            gbl_pos = 0;
                             refresh();
                             break;
                         case 'F':
-                            pos = len;
+                            gbl_pos = gbl_len;
                             refresh();
                             break;
                     }
@@ -435,9 +453,9 @@ void janet_line_init() {
 void janet_line_deinit() {
     int i;
     norawmode();
-    for (i = 0; i < history_count; i++)
-        free(history[i]);
-    historyi = 0;
+    for (i = 0; i < gbl_history_count; i++)
+        free(gbl_history[i]);
+    gbl_historyi = 0;
 }
 
 static int checktermsupport() {
@@ -450,9 +468,9 @@ static int checktermsupport() {
 }
 
 void janet_line_get(const char *p, JanetBuffer *buffer) {
-    prompt = p;
+    gbl_prompt = p;
     buffer->count = 0;
-    historyi = 0;
+    gbl_historyi = 0;
     FILE *out = janet_dynfile("out", stdout);
     if (!isatty(STDIN_FILENO) || !checktermsupport()) {
         simpleline(buffer);
@@ -464,19 +482,20 @@ void janet_line_get(const char *p, JanetBuffer *buffer) {
     }
     if (line()) {
         norawmode();
-        if (sigint_flag) {
+        if (gbl_sigint_flag) {
             raise(SIGINT);
         } else {
             fputc('\n', out);
         }
         return;
     }
+    fflush(stdin);
     norawmode();
     fputc('\n', out);
-    janet_buffer_ensure(buffer, len + 1, 2);
-    memcpy(buffer->data, buf, len);
-    buffer->data[len] = '\n';
-    buffer->count = len + 1;
+    janet_buffer_ensure(buffer, gbl_len + 1, 2);
+    memcpy(buffer->data, gbl_buf, gbl_len);
+    buffer->data[gbl_len] = '\n';
+    buffer->count = gbl_len + 1;
     replacehistory();
 }
 

src/mainclient/line.h

@@ -23,7 +23,9 @@
 #ifndef JANET_LINE_H_defined
 #define JANET_LINE_H_defined
 
+#ifndef JANET_AMALG
 #include <janet.h>
+#endif
 
 void janet_line_init();
 void janet_line_deinit();

src/mainclient/main.c

@@ -20,8 +20,10 @@
 * IN THE SOFTWARE.
 */
 
+#ifndef JANET_AMALG
 #include <janet.h>
 #include "line.h"
+#endif
 
 #ifdef _WIN32
 #include <windows.h>
@@ -31,9 +33,6 @@
 #endif
 #endif
 
-extern const unsigned char *janet_gen_init;
-extern int32_t janet_gen_init_size;
-
 int main(int argc, char **argv) {
     int i, status;
     JanetArray *args;
@@ -47,25 +46,6 @@ int main(int argc, char **argv) {
     dwMode |= ENABLE_VIRTUAL_TERMINAL_PROCESSING;
     SetConsoleMode(hOut, dwMode);
     SetConsoleOutputCP(65001);
-
-    /* Add directory containing janet.exe as DLL search path for
-    dynamic modules on windows. This is needed because dynamic modules reference
-    janet.exe for symbols. Otherwise, janet.exe would have to be in the current directory
-    to load natives correctly. */
-#ifndef JANET_NO_DYNAMIC_MODULES
-    {
-        SetDefaultDllDirectories(LOAD_LIBRARY_SEARCH_USER_DIRS);
-        HMODULE hModule = GetModuleHandleW(NULL);
-        wchar_t path[MAX_PATH];
-        GetModuleFileNameW(hModule, path, MAX_PATH);
-        size_t i = wcsnlen(path, MAX_PATH);
-        while (i > 0 && path[i] != '\\')
-            path[i--] = '\0';
-        if (i) AddDllDirectory(path);
-        GetCurrentDirectoryW(MAX_PATH, path);
-        AddDllDirectory(path);
-    }
-#endif
 #endif
 
     /* Set up VM */
@@ -83,13 +63,20 @@ int main(int argc, char **argv) {
     args = janet_array(argc);
     for (i = 1; i < argc; i++)
         janet_array_push(args, janet_cstringv(argv[i]));
-    janet_table_put(env, janet_ckeywordv("args"), janet_wrap_array(args));
 
     /* Save current executable path to (dyn :executable) */
     janet_table_put(env, janet_ckeywordv("executable"), janet_cstringv(argv[0]));
 
     /* Run startup script */
-    status = janet_dobytes(env, janet_gen_init, janet_gen_init_size, "init.janet", NULL);
+    Janet mainfun, out;
+    janet_resolve(env, janet_csymbol("cli-main"), &mainfun);
+    Janet mainargs[1] = { janet_wrap_array(args) };
+    JanetFiber *fiber = janet_fiber(janet_unwrap_function(mainfun), 64, 1, mainargs);
+    fiber->env = env;
+    status = janet_continue(fiber, janet_wrap_nil(), &out);
+    if (status != JANET_SIGNAL_OK) {
+        janet_stacktrace(fiber, out);
+    }
 
     /* Deinitialize vm */
     janet_deinit();

src/webclient/webinit.janet

@@ -5,7 +5,7 @@
 (fiber/new (fn webrepl []
              (setdyn :pretty-format "%.20P")
              (repl (fn get-line [buf p]
-                     (def offset (parser/where p))
+                     (def [offset] (parser/where p))
                      (def prompt (string "janet:" offset ":" (parser/state p :delimiters) "> "))
                      (repl-yield prompt buf)
                      (yield)

test/helper.janet

@@ -4,22 +4,23 @@
 (var num-tests-run 0)
 (var suite-num 0)
 (var numchecks 0)
+(var start-time 0)
 
 (defn assert [x e]
- (++ num-tests-run)
- (when x (++ num-tests-passed))
- (if x
-   (do
-     (when (= numchecks 25)
-       (set numchecks 0)
-       (print))
-     (++ numchecks)
-     (file/write stdout "\e[32m✔\e[0m"))
-   (do
-     (file/write stdout "\n\e[31m✘\e[0m  ")
-     (set numchecks 0)
-     (print e)))
- x)
+  (++ num-tests-run)
+  (when x (++ num-tests-passed))
+  (if x
+    (do
+      (when (= numchecks 25)
+        (set numchecks 0)
+        (print))
+      (++ numchecks)
+      (file/write stdout "\e[32m✔\e[0m"))
+    (do
+      (file/write stdout "\n\e[31m✘\e[0m  ")
+      (set numchecks 0)
+      (print e)))
+  x)
 
 (defmacro assert-error
   [msg & forms]
@@ -32,10 +33,12 @@
   ~(assert (not= ,errsym (try (do ,;forms) ([_] ,errsym))) ,msg))
 
 (defn start-suite [x]
- (set suite-num x)
- (print "\nRunning test suite " x " tests...\n  "))
+  (set suite-num x)
+  (set start-time (os/clock))
+  (print "\nRunning test suite " x " tests...\n  "))
 
 (defn end-suite []
- (print "\n\nTest suite " suite-num " finished.")
- (print num-tests-passed " of " num-tests-run " tests passed.\n")
- (if (not= num-tests-passed num-tests-run) (os/exit 1)))
+  (def delta (- (os/clock) start-time))
+  (printf "\n\nTest suite %d finished in %.3f seconds" suite-num delta)
+  (print num-tests-passed " of " num-tests-run " tests passed.\n")
+  (if (not= num-tests-passed num-tests-run) (os/exit 1)))

test/install/.gitignore

@@ -1,4 +1,9 @@
 /build
 .cache
-.manifest
+.manifests
 json.*
+jhydro.*
+circlet.*
+argparse.*
+sqlite3.*
+path.*

test/install/test/test1.janet

@@ -1,8 +1,3 @@
 (import build/testmod :as testmod)
 
 (if (not= 5 (testmod/get5)) (error "testmod/get5 failed"))
-
-(import cook)
-
-(with-dyns [:modpath (os/cwd)]
-  (cook/install-git "https://github.com/janet-lang/json.git"))

test/suite0.janet

@@ -55,6 +55,8 @@
 (assert (= (get @{} 1) nil) "get nil from empty table")
 (assert (= (get {:boop :bap} :boop) :bap) "get non nil from struct")
 (assert (= (get @{:boop :bap} :boop) :bap) "get non nil from table")
+(assert (= (get @"\0" 0) 0) "get non nil from buffer")
+(assert (= (get @"\0" 1) nil) "get nil from buffer oob")
 (assert (put @{} :boop :bap) "can add to empty table")
 (assert (put @{1 3} :boop :bap) "can add to non-empty table")
 
@@ -314,5 +316,8 @@
 (assert (= y 1) "regression #137 (5)")
 (assert (= z 2) "regression #137 (6)")
 
+(assert (= true ;(map truthy? [0 "" true @{} {} [] '()])) "truthy values")
+(assert (= false ;(map truthy? [nil false])) "non-truthy values")
+
 (end-suite)
 

test/suite2.janet

@@ -62,8 +62,7 @@
 
 # String functions
 (assert (= 3 (string/find "abc" "   abcdefghijklmnop")) "string/find 1")
-(assert (= nil (string/find "" "")) "string/find 2")
-(assert (= 0 (string/find "A" "A")) "string/find 3")
+(assert (= 0 (string/find "A" "A")) "string/find 2")
 (assert (string/has-prefix? "" "foo") "string/has-prefix? 1")
 (assert (string/has-prefix? "fo" "foo") "string/has-prefix? 2")
 (assert (not (string/has-prefix? "o" "foo")) "string/has-prefix? 3")
@@ -98,6 +97,12 @@
 (assert (deep= (string/find-all "e" "onetwothree") @[2 9 10]) "string/find-all 1")
 (assert (deep= (string/find-all "," "onetwothree") @[]) "string/find-all 2")
 
+(assert-error "string/find error 1" (string/find "" "abcd"))
+(assert-error "string/split error 1" (string/split "" "abcd"))
+(assert-error "string/replace error 1" (string/replace "" "." "abcd"))
+(assert-error "string/replace-all error 1" (string/replace-all "" "." "abcdabcd"))
+(assert-error "string/find-all error 1" (string/find-all "" "abcd"))
+
 # Check if abstract test works
 (assert (abstract? stdout) "abstract? stdout")
 (assert (abstract? stdin) "abstract? stdin")

test/suite3.janet

@@ -78,11 +78,15 @@
 
 # Another regression test - no segfaults
 (defn afn [x] x)
-(assert (= 1 (try (afn) ([err] 1))) "bad arity 1")
+(var afn-var afn)
+(var identity-var identity)
+(var map-var map)
+(var not-var not)
+(assert (= 1 (try (afn-var) ([err] 1))) "bad arity 1")
 (assert (= 4 (try ((fn [x y] (+ x y)) 1) ([_] 4))) "bad arity 2")
-(assert (= 1 (try (identity) ([err] 1))) "bad arity 3")
-(assert (= 1 (try (map) ([err] 1))) "bad arity 4")
-(assert (= 1 (try (not) ([err] 1))) "bad arity 5")
+(assert (= 1 (try (identity-var) ([err] 1))) "bad arity 3")
+(assert (= 1 (try (map-var) ([err] 1))) "bad arity 4")
+(assert (= 1 (try (not-var) ([err] 1))) "bad arity 5")
 
 # Assembly test
 # Fibonacci sequence, implemented with naive recursion.
@@ -113,9 +117,9 @@
 
 (assert (= 1 ({:ok 1} :ok)) "calling struct")
 (assert (= 2 (@{:ok 2} :ok)) "calling table")
-(assert (= :bad (try (@{:ok 2} :ok :no) ([err] :bad))) "calling table too many arguments")
-(assert (= :bad (try (:ok @{:ok 2} :no) ([err] :bad))) "calling keyword too many arguments")
-(assert (= :oops (try (1 1) ([err] :oops))) "calling number fails")
+(assert (= :bad (try ((identity @{:ok 2}) :ok :no) ([err] :bad))) "calling table too many arguments")
+(assert (= :bad (try ((identity :ok) @{:ok 2} :no) ([err] :bad))) "calling keyword too many arguments")
+(assert (= :oops (try ((+ 2 -1) 1) ([err] :oops))) "calling number fails")
 
 # Method test
 
@@ -356,6 +360,38 @@
 (check-match janet-longstring "``` `` ```" true)
 (check-match janet-longstring "``  ```" false)
 
+# Backmatch
+
+(def backmatcher-1 '(* (capture (any "x") :1) "y" (backmatch :1) -1))
+
+(check-match backmatcher-1 "y" true)
+(check-match backmatcher-1 "xyx" true)
+(check-match backmatcher-1 "xxxxxxxyxxxxxxx" true)
+(check-match backmatcher-1 "xyxx" false)
+(check-match backmatcher-1 "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxy" false)
+(check-match backmatcher-1 (string (string/repeat "x" 10000) "y") false)
+(check-match backmatcher-1 (string (string/repeat "x" 10000) "y" (string/repeat "x" 10000)) true)
+
+(def backmatcher-2 '(* '(any "x") "y" (backmatch) -1))
+
+(check-match backmatcher-2 "y" true)
+(check-match backmatcher-2 "xyx" true)
+(check-match backmatcher-2 "xxxxxxxyxxxxxxx" true)
+(check-match backmatcher-2 "xyxx" false)
+(check-match backmatcher-2 "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxy" false)
+(check-match backmatcher-2 (string (string/repeat "x" 10000) "y") false)
+(check-match backmatcher-2 (string (string/repeat "x" 10000) "y" (string/repeat "x" 10000)) true)
+
+(def longstring-2 '(* '(some "`") (some (if-not (backmatch) 1)) (backmatch) -1))
+
+(check-match longstring-2 "`john" false)
+(check-match longstring-2 "abc" false)
+(check-match longstring-2 "` `" true)
+(check-match longstring-2 "`  `" true)
+(check-match longstring-2 "``  ``" true)
+(check-match longstring-2 "``` `` ```" true)
+(check-match longstring-2 "``  ```" false)
+
 # Optional
 
 (check-match '(* (opt "hi") -1) "" true)
@@ -389,4 +425,22 @@
 (assert (= (tuple/type (-> '(1 2 3) marshal unmarshal)) :parens) "normal tuple marshalled/unmarshalled")
 (assert (= (tuple/type (-> '[1 2 3] marshal unmarshal)) :brackets) "normal tuple marshalled/unmarshalled")
 
+# Check for bad memoization (+ :a) should mean different things in different contexts.
+(def redef-a
+  ~{:a "abc"
+    :c (+ :a)
+    :main (* :c {:a "def" :main (+ :a)} -1)})
+
+(check-match redef-a "abcdef" true)
+(check-match redef-a "abcabc" false)
+(check-match redef-a "defdef" false)
+
+(def redef-b
+  ~{:pork {:pork "beef" :main (+ -1 (* 1 :pork))}
+    :main :pork})
+
+(check-match redef-b "abeef" true)
+(check-match redef-b "aabeef" false)
+(check-match redef-b "aaaaaa" false)
+
 (end-suite)

test/suite5.janet

@@ -54,6 +54,7 @@
 (assert (= (a 2) (b 1) ) "tarray views pointing same buffer")
 (assert (= ((tarray/slice b) 3) (b 3) (a 6) 6) "tarray slice")
 (assert (= ((tarray/slice b 1) 2) (b 3) (a 6) 6) "tarray slice")
+(assert (= (:length a) (length a)) "length method and function")
 
 (assert (= ((unmarshal (marshal b)) 3) (b 3)) "marshal")
 

test/suite6.janet

@@ -65,6 +65,9 @@
 (assert (:== (:/ (u64 "0xffff_ffff_ffff_ffff") 8 2) "0xfffffffffffffff") "bigint operations")
 (assert (let [a (u64 0xff)] (:== (:+ a a a a) (:* a 2 2))) "bigint operations")
 
+(assert (= (string (i64 -123)) "-123") "i64 prints reasonably")
+(assert (= (string (u64 123)) "123") "u64 prints reasonably")
+
 (assert-error
  "trap INT64_MIN / -1"
  (:/ (int/s64 "-0x8000_0000_0000_0000") -1))
@@ -118,12 +121,23 @@
 (assert (deep= (parser/status p) (parser/status p2)) "parser 2")
 (assert (deep= (parser/state p) (parser/state p2)) "parser 3")
 
+# Parser errors
+(defn parse-error [input]
+  (def p (parser/new))
+  (parser/consume p input)
+  (parser/error p))
+
+# Invalid utf-8 sequences
+(assert (not= nil (parse-error @"\xc3\x28")) "reject invalid utf-8 symbol")
+(assert (not= nil (parse-error @":\xc3\x28")) "reject invalid utf-8 keyword")
+
 # String check-set
 (assert (string/check-set "abc" "a") "string/check-set 1")
 (assert (not (string/check-set "abc" "z")) "string/check-set 2")
 (assert (string/check-set "abc" "abc") "string/check-set 3")
-(assert (not (string/check-set "abc" "")) "string/check-set 4")
+(assert (string/check-set "abc" "") "string/check-set 4")
 (assert (not (string/check-set "" "aabc")) "string/check-set 5")
+(assert (not (string/check-set "abc" "abcdefg")) "string/check-set 6")
 
 # Marshal and unmarshal pegs
 (def p (-> "abcd" peg/compile marshal unmarshal))

test/suite7.janet

@@ -128,7 +128,7 @@
 
 # Make sure Carriage Returns don't end up in doc strings.
 
-(assert (not (string/find "\r" (get ((fiber/getenv (fiber/current)) 'cond) :doc))) "no \\r in doc strings")
+(assert (not (string/find "\r" (get ((fiber/getenv (fiber/current)) 'cond) :doc ""))) "no \\r in doc strings")
 
 # module/expand-path regression
 (with-dyns [:syspath ".janet/.janet"]
@@ -154,6 +154,127 @@
 (assert (= (((|||4))) 4) "function shorthand 7")
 (assert (= (|(+ $1 $1 $1 $1) 2 4) 16) "function shorthand 8")
 (assert (= (|(+ $0 $1 $3 $2 $6) 0 1 2 3 4 5 6) 12) "function shorthand 9")
+(assert (= (|(+ $0 $99) ;(range 100)) 99) "function shorthand 10")
 
+# Simple function break
+(debug/fbreak map 1)
+(def f (fiber/new (fn [] (map inc [1 2 3])) :a))
+(resume f)
+(assert (= :debug (fiber/status f)) "debug/fbreak")
+(debug/unfbreak map 1)
+(map inc [1 2 3])
+
+(defn idx= [x y] (= (tuple/slice x) (tuple/slice y)))
+
+# Simple take, drop, etc. tests.
+(assert (idx= (take 10 (range 100)) (range 10)) "take 10")
+(assert (idx= (drop 10 (range 100)) (range 10 100)) "drop 10")
+
+# Printing to buffers
+(def out-buf @"")
+(def err-buf @"")
+(with-dyns [:out out-buf :err err-buf]
+  (print "Hello")
+  (prin "hi")
+  (eprint "Sup")
+  (eprin "not much."))
+
+(assert (= (string out-buf) "Hello\nhi") "print and prin to buffer 1")
+(assert (= (string err-buf) "Sup\nnot much.") "eprint and eprin to buffer 1")
+
+(assert (= (string '()) (string [])) "empty bracket tuple literal")
+
+# with-vars
+(var abc 123)
+(assert (= 356 (with-vars [abc 456] (- abc 100))) "with-vars 1")
+(assert-error "with-vars 2" (with-vars [abc 456] (error :oops)))
+(assert (= abc 123) "with-vars 3")
+
+# Trim empty string
+(assert (= "" (string/trim " ")) "string/trim regression")
+
+# RNGs
+
+(defn test-rng
+  [rng]
+  (assert (all identity (seq [i :range [0 1000]]
+                             (<= (math/rng-int rng i) i))) "math/rng-int test")
+  (assert (all identity (seq [i :range [0 1000]]
+    (def x (math/rng-uniform rng))
+    (and (>= x 0) (< x 1))))
+          "math/rng-uniform test"))
+
+(def seedrng (math/rng 123))
+(for i 0 75
+  (test-rng (math/rng (:int seedrng))))
+
+(assert (deep-not= (-> 123 math/rng (:buffer 16))
+                   (-> 456 math/rng (:buffer 16))) "math/rng-buffer 1")
+
+(assert-no-error "math/rng-buffer 2" (math/seedrandom "abcdefg"))
+
+# OS Date test
+
+(assert (deep= {:year-day 0
+                :minutes 30
+                :month 0
+                :dst false
+                :seconds 0
+                :year 2014
+                :month-day 0
+                :hours 20 
+                :week-day 3}
+               (os/date 1388608200)) "os/date")
+
+# Appending buffer to self
+
+(with-dyns [:out @""]
+  (prin "abcd")
+  (prin (dyn :out))
+  (prin (dyn :out))
+  (assert (deep= (dyn :out) @"abcdabcdabcdabcd") "print buffer to self"))
+
+(os/setenv "TESTENV1" "v1")
+(os/setenv "TESTENV2" "v2")
+(assert (= (os/getenv "TESTENV1") "v1") "getenv works")
+(def environ (os/environ))
+(assert (= [(environ "TESTENV1") (environ "TESTENV2")] ["v1" "v2"]) "environ works")
+
+# Issue #183 - just parse it :)
+1e-4000000000000000000000
+
+# Ensure randomness puts n of pred into our buffer eventually
+(defn cryptorand-check
+  [n pred]
+  (def max-attempts 10000)
+  (var attempts 0)
+  (while (not= attempts max-attempts)
+    (def cryptobuf (os/cryptorand 10))
+    (when (= n (count pred cryptobuf))
+      (break))
+    (++ attempts))
+  (not= attempts max-attempts))
+
+(def v (math/rng-int (math/rng (os/time)) 100))
+(assert (cryptorand-check 0 |(= $ v)) "cryptorand skips value sometimes")
+(assert (cryptorand-check 1 |(= $ v)) "cryptorand has value sometimes")
+
+(do 
+  (def buf (buffer/new-filled 1))
+  (os/cryptorand 1 buf)
+  (assert (= (in buf 0) 0) "cryptorand doesn't overwrite buffer")
+  (assert (= (length buf) 2) "cryptorand appends to buffer"))
+
+# Nested quasiquotation
+
+(def nested ~(a ~(b ,(+ 1 2) ,(foo ,(+ 1 3) d) e) f))
+(assert (deep= nested '(a ~(b ,(+ 1 2) ,(foo 4 d) e) f)) "nested quasiquote")
+
+# Top level unquote
+(defn constantly
+  []
+  (comptime (math/random)))
+
+(assert (= (constantly) (constantly)) "comptime 1")
 
 (end-suite)

tools/afl/README.md

@@ -0,0 +1,14 @@
+# AFL Fuzzing scripts
+
+To use these, you need to install afl (of course), and xterm. A tiling window manager helps manage
+many concurrent fuzzer instances.
+
+## Fuzz the parser
+```
+$ sh ./tools/afl/prepare_to_fuzz.sh
+export NFUZZ=1
+$ sh ./tools/afl/fuzz.sh parser
+Ctrl+C when done to close all fuzzer terminals.
+$ sh ./tools/afl/aggregate_cases.sh parser
+$ ls ./fuzz_out/parser_aggregated/
+```

tools/afl/aggregate_cases.sh

@@ -0,0 +1,13 @@
+set -eux
+
+n=0
+for tc in $(echo ./fuzz_out/$1/*/hangs/* ./fuzz_out/$1/*/crashes/*)
+do
+  if ! test -e $tc
+  then
+    continue
+  fi
+  mkdir -p ./fuzz_out/$1_aggregated/
+  cp "$tc" $(printf "./fuzz_out/$1_aggregated/$1-%04d.test" $n)
+  n=$((n + 1))
+done

tools/afl/fuzz.sh

@@ -0,0 +1,36 @@
+set -eux
+
+NFUZZ=${NFUZZ:-1}
+children=""
+
+function finish {
+  for pid in $children
+  do
+    set +e
+    kill -s INT $pid
+  done
+  wait
+}
+trap finish EXIT
+
+test -e ./tools/afl/$1_testcases
+test -e ./tools/afl/$1_runner.janet
+
+echo "running fuzz master..."
+xterm -e \
+  "afl-fuzz -i ./tools/afl/$1_testcases -o ./fuzz_out/$1 -M Fuzz$1_0 -- ./build/janet ./tools/afl/$1_runner.janet @@" &
+children="$! $children"
+echo "waiting for afl to get started before starting secondary fuzzers"
+sleep 10
+
+NFUZZ=$((NFUZZ - 1))
+
+for N in $(seq $NFUZZ)
+do
+  xterm -e \
+    "afl-fuzz -i ./tools/afl/$1_testcases -o ./fuzz_out/$1 -S Fuzz$1_$N -- ./build/janet ./tools/afl/$1_runner.janet @@" &
+  children="$! $children"
+done
+
+echo "waiting for child terminals to exit."
+wait

tools/afl/parser_runner.janet

@@ -0,0 +1,4 @@
+(def p (parser/new))
+(parser/consume p (slurp ((dyn :args) 1)))
+(while (parser/has-more p)
+  (pp (parser/produce p)))

tools/afl/parser_testcases/simple.janet

@@ -0,0 +1,15 @@
+0
+123.653
+true
+:true
+{}
+`
+   hello
+`
+|()
+,()
+@{:hello "world"}
+@[1 "hello"]
+nil
+(foo 2 3)
+([{} @{:k ([""])}])

tools/afl/prepare_to_fuzz.sh

@@ -0,0 +1,6 @@
+set -eux
+
+export CC=afl-clang
+make clean
+make -j $(nproc) all
+mkdir -p "./fuzz_out"

tools/amalg.janet

@@ -9,4 +9,8 @@
 
 # Body
 (each path (tuple/slice (dyn :args) 1)
+  (print "\n/* " path " */\n")
   (print (slurp path)))
+
+# maybe will help
+(:flush stdout)

tools/format.sh

@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/usr/bin/env bash
 
 # Format all code with astyle
 

tools/removecr.janet

@@ -0,0 +1,7 @@
+# Remove carriage returns from file. Since piping things on 
+# windows may add bad line endings, we can just force removal
+# with this script.
+(def fname ((dyn :args) 1))
+(def source (slurp fname))
+(def new-source (string/replace-all "\r" "" source))
+(spit fname new-source :wb)