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333ae7c4f8
janet/src/core/corelib.c
Calvin Rose 333ae7c4f8 Make amalgamtion the default when building. 
This way we can support fewer build configurations. Also, remove
all undefined behavior due to use of memcpy with NULL pointers. GCC
was exploiting this to remove NULL checks in some builds.
2020-01-28 23:38:52 -06:00

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/*
* Copyright (c) 2020 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 "features.h"
#include <janet.h>
#include <math.h>
#include "compile.h"
#include "state.h"
#include "util.h"
#endif
/* Generated bytes */
#ifndef JANET_BOOTSTRAP
extern const unsigned char *janet_core_image;
extern size_t janet_core_image_size;
#endif
/* Use LoadLibrary on windows or dlopen on posix to load dynamic libaries
* with native code. */
#if defined(JANET_NO_DYNAMIC_MODULES)
typedef int Clib;
#define load_clib(name) ((void) name, 0)
#define symbol_clib(lib, sym) ((void) lib, (void) sym, NULL)
#define error_clib() "dynamic libraries not supported"
#elif defined(JANET_WINDOWS)
#include <windows.h>
typedef HINSTANCE Clib;
#define load_clib(name) LoadLibrary((name))
#define symbol_clib(lib, sym) GetProcAddress((lib), (sym))
static char error_clib_buf[256];
static char *error_clib(void) {
FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
error_clib_buf, sizeof(error_clib_buf), NULL);
error_clib_buf[strlen(error_clib_buf) - 1] = '\0';
return error_clib_buf;
}
#else
#include <dlfcn.h>
typedef void *Clib;
#define load_clib(name) dlopen((name), RTLD_NOW)
#define symbol_clib(lib, sym) dlsym((lib), (sym))
#define error_clib() dlerror()
#endif
JanetModule janet_native(const char *name, const uint8_t **error) {
Clib lib = load_clib(name);
JanetModule init;
JanetModconf getter;
if (!lib) {
*error = janet_cstring(error_clib());
return NULL;
}
init = (JanetModule) symbol_clib(lib, "_janet_init");
if (!init) {
*error = janet_cstring("could not find the _janet_init symbol");
return NULL;
}
getter = (JanetModconf) symbol_clib(lib, "_janet_mod_config");
if (!getter) {
*error = janet_cstring("could not find the _janet_mod_config symbol");
return NULL;
}
JanetBuildConfig modconf = getter();
JanetBuildConfig host = janet_config_current();
if (host.major != modconf.major ||
host.minor < modconf.minor ||
host.bits != modconf.bits) {
char errbuf[128];
sprintf(errbuf, "config mismatch - host %d.%.d.%d(%.4x) vs. module %d.%d.%d(%.4x)",
host.major,
host.minor,
host.patch,
host.bits,
modconf.major,
modconf.minor,
modconf.patch,
modconf.bits);
*error = janet_cstring(errbuf);
return NULL;
}
return init;
}
static const char *janet_dyncstring(const char *name, const char *dflt) {
Janet x = janet_dyn(name);
if (janet_checktype(x, JANET_NIL)) return dflt;
if (!janet_checktype(x, JANET_STRING)) {
janet_panicf("expected string, got %v", x);
}
const uint8_t *jstr = janet_unwrap_string(x);
const char *cstr = (const char *)jstr;
if (strlen(cstr) != (size_t) janet_string_length(jstr)) {
janet_panicf("string %v contains embedded 0s");
}
return cstr;
}
static int is_path_sep(char c) {
#ifdef JANET_WINDOWS
if (c == '\\') return 1;
#endif
return c == '/';
}
/* Used for module system. */
static Janet janet_core_expand_path(int32_t argc, Janet *argv) {
janet_fixarity(argc, 2);
const char *input = janet_getcstring(argv, 0);
const char *template = janet_getcstring(argv, 1);
const char *curfile = janet_dyncstring("current-file", "");
const char *syspath = janet_dyncstring("syspath", "");
JanetBuffer *out = janet_buffer(0);
size_t tlen = strlen(template);
/* Calculate name */
const char *name = input + strlen(input);
while (name > input) {
if (is_path_sep(*(name - 1))) break;
name--;
}
/* Calculate dirpath from current file */
const char *curname = curfile + strlen(curfile);
while (curname > curfile) {
if (is_path_sep(*curname)) break;
curname--;
}
const char *curdir;
int32_t curlen;
if (curname == curfile) {
/* Current file has one or zero path segments, so
* we are in the . directory. */
curdir = ".";
curlen = 1;
} else {
/* Current file has 2 or more segments, so we
* can cut off the last segment. */
curdir = curfile;
curlen = (int32_t)(curname - curfile);
}
for (size_t i = 0; i < tlen; i++) {
if (template[i] == ':') {
if (strncmp(template + i, ":all:", 5) == 0) {
janet_buffer_push_cstring(out, input);
i += 4;
} else if (strncmp(template + i, ":cur:", 5) == 0) {
janet_buffer_push_bytes(out, (const uint8_t *)curdir, curlen);
i += 4;
} else if (strncmp(template + i, ":dir:", 5) == 0) {
janet_buffer_push_bytes(out, (const uint8_t *)input,
(int32_t)(name - input));
i += 4;
} else if (strncmp(template + i, ":sys:", 5) == 0) {
janet_buffer_push_cstring(out, syspath);
i += 4;
} 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]);
}
} else {
janet_buffer_push_u8(out, (uint8_t) template[i]);
}
}
/* Normalize */
uint8_t *scan = out->data;
uint8_t *print = scan;
uint8_t *scanend = scan + out->count;
int normal_section_count = 0;
int dot_count = 0;
while (scan < scanend) {
if (*scan == '.') {
if (dot_count >= 0) {
dot_count++;
} else {
*print++ = '.';
}
} else if (is_path_sep(*scan)) {
if (dot_count == 1) {
;
} else if (dot_count == 2) {
if (normal_section_count > 0) {
/* unprint last separator */
print--;
/* unprint last section */
while (print > out->data && !is_path_sep(*(print - 1)))
print--;
normal_section_count--;
} else {
*print++ = '.';
*print++ = '.';
*print++ = '/';
}
} else if (scan == out->data || dot_count != 0) {
while (dot_count > 0) {
--dot_count;
*print++ = '.';
}
if (scan > out->data) {
normal_section_count++;
}
*print++ = '/';
}
dot_count = 0;
} else {
while (dot_count > 0) {
--dot_count;
*print++ = '.';
}
dot_count = -1;
*print++ = *scan;
}
scan++;
}
out->count = (int32_t)(print - out->data);
return janet_wrap_buffer(out);
}
static Janet janet_core_dyn(int32_t argc, Janet *argv) {
janet_arity(argc, 1, 2);
Janet value;
if (janet_vm_fiber->env) {
value = janet_table_get(janet_vm_fiber->env, argv[0]);
} else {
value = janet_wrap_nil();
}
if (argc == 2 && janet_checktype(value, JANET_NIL)) {
return argv[1];
}
return value;
}
static Janet janet_core_setdyn(int32_t argc, Janet *argv) {
janet_fixarity(argc, 2);
if (!janet_vm_fiber->env) {
janet_vm_fiber->env = janet_table(2);
}
janet_table_put(janet_vm_fiber->env, argv[0], argv[1]);
return argv[1];
}
static Janet janet_core_native(int32_t argc, Janet *argv) {
JanetModule init;
janet_arity(argc, 1, 2);
const uint8_t *path = janet_getstring(argv, 0);
const uint8_t *error = NULL;
JanetTable *env;
if (argc == 2) {
env = janet_gettable(argv, 1);
} else {
env = janet_table(0);
}
init = janet_native((const char *)path, &error);
if (!init) {
janet_panicf("could not load native %S: %S", path, error);
}
init(env);
janet_table_put(env, janet_ckeywordv("native"), argv[0]);
return janet_wrap_table(env);
}
static Janet janet_core_describe(int32_t argc, Janet *argv) {
JanetBuffer *b = janet_buffer(0);
for (int32_t i = 0; i < argc; ++i)
janet_description_b(b, argv[i]);
return janet_stringv(b->data, b->count);
}
static Janet janet_core_string(int32_t argc, Janet *argv) {
JanetBuffer *b = janet_buffer(0);
for (int32_t i = 0; i < argc; ++i)
janet_to_string_b(b, argv[i]);
return janet_stringv(b->data, b->count);
}
static Janet janet_core_symbol(int32_t argc, Janet *argv) {
JanetBuffer *b = janet_buffer(0);
for (int32_t i = 0; i < argc; ++i)
janet_to_string_b(b, argv[i]);
return janet_symbolv(b->data, b->count);
}
static Janet janet_core_keyword(int32_t argc, Janet *argv) {
JanetBuffer *b = janet_buffer(0);
for (int32_t i = 0; i < argc; ++i)
janet_to_string_b(b, argv[i]);
return janet_keywordv(b->data, b->count);
}
static Janet janet_core_buffer(int32_t argc, Janet *argv) {
JanetBuffer *b = janet_buffer(0);
for (int32_t i = 0; i < argc; ++i)
janet_to_string_b(b, argv[i]);
return janet_wrap_buffer(b);
}
static Janet janet_core_is_abstract(int32_t argc, Janet *argv) {
janet_fixarity(argc, 1);
return janet_wrap_boolean(janet_checktype(argv[0], JANET_ABSTRACT));
}
static Janet janet_core_scannumber(int32_t argc, Janet *argv) {
double number;
janet_fixarity(argc, 1);
JanetByteView view = janet_getbytes(argv, 0);
if (janet_scan_number(view.bytes, view.len, &number))
return janet_wrap_nil();
return janet_wrap_number(number);
}
static Janet janet_core_tuple(int32_t argc, Janet *argv) {
return janet_wrap_tuple(janet_tuple_n(argv, argc));
}
static Janet janet_core_array(int32_t argc, Janet *argv) {
JanetArray *array = janet_array(argc);
array->count = argc;
safe_memcpy(array->data, argv, argc * sizeof(Janet));
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)
janet_panic("expected even number of arguments");
JanetTable *table = janet_table(argc >> 1);
for (i = 0; i < argc; i += 2) {
janet_table_put(table, argv[i], argv[i + 1]);
}
return janet_wrap_table(table);
}
static Janet janet_core_struct(int32_t argc, Janet *argv) {
int32_t i;
if (argc & 1)
janet_panic("expected even number of arguments");
JanetKV *st = janet_struct_begin(argc >> 1);
for (i = 0; i < argc; i += 2) {
janet_struct_put(st, argv[i], argv[i + 1]);
}
return janet_wrap_struct(janet_struct_end(st));
}
static Janet janet_core_gensym(int32_t argc, Janet *argv) {
(void) argv;
janet_fixarity(argc, 0);
return janet_wrap_symbol(janet_symbol_gen());
}
static Janet janet_core_gccollect(int32_t argc, Janet *argv) {
(void) argv;
(void) argc;
janet_collect();
return janet_wrap_nil();
}
static Janet janet_core_gcsetinterval(int32_t argc, Janet *argv) {
janet_fixarity(argc, 1);
size_t s = janet_getsize(argv, 0);
/* limit interval to 48 bits */
if (s > 0xFFFFFFFFFFFFUl) {
janet_panic("interval too large");
}
janet_vm_gc_interval = s;
return janet_wrap_nil();
}
static Janet janet_core_gcinterval(int32_t argc, Janet *argv) {
(void) argv;
janet_fixarity(argc, 0);
return janet_wrap_number((double) janet_vm_gc_interval);
}
static Janet janet_core_type(int32_t argc, Janet *argv) {
janet_fixarity(argc, 1);
JanetType t = janet_type(argv[0]);
if (t == JANET_ABSTRACT) {
return janet_ckeywordv(janet_abstract_type(janet_unwrap_abstract(argv[0]))->name);
} else {
return janet_ckeywordv(janet_type_names[t]);
}
}
static Janet janet_core_hash(int32_t argc, Janet *argv) {
janet_fixarity(argc, 1);
return janet_wrap_number(janet_hash(argv[0]));
}
static Janet janet_core_getline(int32_t argc, Janet *argv) {
FILE *in = janet_dynfile("in", stdin);
FILE *out = janet_dynfile("out", stdout);
janet_arity(argc, 0, 2);
JanetBuffer *buf = (argc >= 2) ? janet_getbuffer(argv, 1) : janet_buffer(10);
if (argc >= 1) {
const char *prompt = (const char *) janet_getstring(argv, 0);
fprintf(out, "%s", prompt);
fflush(out);
}
{
buf->count = 0;
int c;
for (;;) {
c = fgetc(in);
if (feof(in) || c < 0) {
break;
}
janet_buffer_push_u8(buf, (uint8_t) c);
if (c == '\n') break;
}
}
return janet_wrap_buffer(buf);
}
static Janet janet_core_trace(int32_t argc, Janet *argv) {
janet_fixarity(argc, 1);
JanetFunction *func = janet_getfunction(argv, 0);
func->gc.flags |= JANET_FUNCFLAG_TRACE;
return argv[0];
}
static Janet janet_core_untrace(int32_t argc, Janet *argv) {
janet_fixarity(argc, 1);
JanetFunction *func = janet_getfunction(argv, 0);
func->gc.flags &= ~JANET_FUNCFLAG_TRACE;
return argv[0];
}
static Janet janet_core_check_int(int32_t argc, Janet *argv) {
janet_fixarity(argc, 1);
if (!janet_checktype(argv[0], JANET_NUMBER)) goto ret_false;
double num = janet_unwrap_number(argv[0]);
return janet_wrap_boolean(num == (double)((int32_t)num));
ret_false:
return janet_wrap_false();
}
static Janet janet_core_check_nat(int32_t argc, Janet *argv) {
janet_fixarity(argc, 1);
if (!janet_checktype(argv[0], JANET_NUMBER)) goto ret_false;
double num = janet_unwrap_number(argv[0]);
return janet_wrap_boolean(num >= 0 && (num == (double)((int32_t)num)));
ret_false:
return janet_wrap_false();
}
static const JanetReg corelib_cfuns[] = {
{
"native", janet_core_native,
JDOC("(native path &opt env)\n\n"
"Load a native module from the given path. The path "
"must be an absolute or relative path on the file system, and is "
"usually a .so file on Unix systems, and a .dll file on Windows. "
"Returns an environment table that contains functions and other values "
"from the native module.")
},
{
"describe", janet_core_describe,
JDOC("(describe x)\n\n"
"Returns a string that is a human readable description of a value x.")
},
{
"string", janet_core_string,
JDOC("(string & parts)\n\n"
"Creates a string by concatenating values together. Values are "
"converted to bytes via describe if they are not byte sequences. "
"Returns the new string.")
},
{
"symbol", janet_core_symbol,
JDOC("(symbol & xs)\n\n"
"Creates a symbol by concatenating values together. Values are "
"converted to bytes via describe if they are not byte sequences. Returns "
"the new symbol.")
},
{
"keyword", janet_core_keyword,
JDOC("(keyword & xs)\n\n"
"Creates a keyword by concatenating values together. Values are "
"converted to bytes via describe if they are not byte sequences. Returns "
"the new keyword.")
},
{
"buffer", janet_core_buffer,
JDOC("(buffer & xs)\n\n"
"Creates a new buffer by concatenating values together. Values are "
"converted to bytes via describe if they are not byte sequences. Returns "
"the new buffer.")
},
{
"abstract?", janet_core_is_abstract,
JDOC("(abstract? x)\n\n"
"Check if x is an abstract type.")
},
{
"table", janet_core_table,
JDOC("(table & kvs)\n\n"
"Creates a new table from a variadic number of keys and values. "
"kvs is a sequence k1, v1, k2, v2, k3, v3, ... If kvs has "
"an odd number of elements, an error will be thrown. Returns the "
"new table.")
},
{
"array", janet_core_array,
JDOC("(array & items)\n\n"
"Create a new array that contains items. Returns the new array.")
},
{
"scan-number", janet_core_scannumber,
JDOC("(scan-number str)\n\n"
"Parse a number from a byte sequence an return that number, either and integer "
"or a real. The number "
"must be in the same format as numbers in janet source code. Will return nil "
"on an invalid number.")
},
{
"tuple", janet_core_tuple,
JDOC("(tuple & items)\n\n"
"Creates a new tuple that contains items. Returns the new tuple.")
},
{
"struct", janet_core_struct,
JDOC("(struct & kvs)\n\n"
"Create a new struct from a sequence of key value pairs. "
"kvs is a sequence k1, v1, k2, v2, k3, v3, ... If kvs has "
"an odd number of elements, an error will be thrown. Returns the "
"new struct.")
},
{
"gensym", janet_core_gensym,
JDOC("(gensym)\n\n"
"Returns a new symbol that is unique across the runtime. This means it "
"will not collide with any already created symbols during compilation, so "
"it can be used in macros to generate automatic bindings.")
},
{
"gccollect", janet_core_gccollect,
JDOC("(gccollect)\n\n"
"Run garbage collection. You should probably not call this manually.")
},
{
"gcsetinterval", janet_core_gcsetinterval,
JDOC("(gcsetinterval interval)\n\n"
"Set an integer number of bytes to allocate before running garbage collection. "
"Low values for interval will be slower but use less memory. "
"High values will be faster but use more memory.")
},
{
"gcinterval", janet_core_gcinterval,
JDOC("(gcinterval)\n\n"
"Returns the integer number of bytes to allocate before running an iteration "
"of garbage collection.")
},
{
"type", janet_core_type,
JDOC("(type x)\n\n"
"Returns the type of x as a keyword symbol. x is one of\n"
"\t:nil\n"
"\t:boolean\n"
"\t:integer\n"
"\t:real\n"
"\t:array\n"
"\t:tuple\n"
"\t:table\n"
"\t:struct\n"
"\t:string\n"
"\t:buffer\n"
"\t:symbol\n"
"\t:keyword\n"
"\t:function\n"
"\t:cfunction\n\n"
"or another symbol for an abstract type.")
},
{
"hash", janet_core_hash,
JDOC("(hash value)\n\n"
"Gets a hash value for any janet value. The hash is an integer can be used "
"as a cheap hash function for all janet objects. If two values are strictly equal, "
"then they will have the same hash value.")
},
{
"getline", janet_core_getline,
JDOC("(getline &opt prompt buf env)\n\n"
"Reads a line of input into a buffer, including the newline character, using a prompt. "
"An optional environment table can be provided for autocomplete. "
"Returns the modified buffer. "
"Use this function to implement a simple interface for a terminal program.")
},
{
"dyn", janet_core_dyn,
JDOC("(dyn key &opt default)\n\n"
"Get a dynamic binding. Returns the default value (or nil) if no binding found.")
},
{
"setdyn", janet_core_setdyn,
JDOC("(setdyn key value)\n\n"
"Set a dynamic binding. Returns value.")
},
{
"trace", janet_core_trace,
JDOC("(trace func)\n\n"
"Enable tracing on a function. Returns the function.")
},
{
"untrace", janet_core_untrace,
JDOC("(untrace func)\n\n"
"Disables tracing on a function. Returns the function.")
},
{
"module/expand-path", janet_core_expand_path,
JDOC("(module/expand-path path template)\n\n"
"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. 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,
JDOC("(int? x)\n\n"
"Check if x can be exactly represented as a 32 bit signed two's complement integer.")
},
{
"nat?", janet_core_check_nat,
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}
};
#ifdef JANET_BOOTSTRAP
/* Utility for inline assembly */
static void janet_quick_asm(
JanetTable *env,
int32_t flags,
const char *name,
int32_t arity,
int32_t min_arity,
int32_t max_arity,
int32_t slots,
const uint32_t *bytecode,
size_t bytecode_size,
const char *doc) {
JanetFuncDef *def = janet_funcdef_alloc();
def->arity = arity;
def->min_arity = min_arity;
def->max_arity = max_arity;
def->flags = flags;
def->slotcount = slots;
def->bytecode = malloc(bytecode_size);
def->bytecode_length = (int32_t)(bytecode_size / sizeof(uint32_t));
def->name = janet_cstring(name);
if (!def->bytecode) {
JANET_OUT_OF_MEMORY;
}
memcpy(def->bytecode, bytecode, bytecode_size);
janet_def(env, name, janet_wrap_function(janet_thunk(def)), doc);
}
/* Macros for easier inline janet assembly */
#define SSS(op, a, b, c) ((op) | ((a) << 8) | ((b) << 16) | ((c) << 24))
#define SS(op, a, b) ((op) | ((a) << 8) | ((b) << 16))
#define SSI(op, a, b, I) ((op) | ((a) << 8) | ((b) << 16) | ((uint32_t)(I) << 24))
#define S(op, a) ((op) | ((a) << 8))
#define SI(op, a, I) ((op) | ((a) << 8) | ((uint32_t)(I) << 16))
/* Templatize a varop */
static void templatize_varop(
JanetTable *env,
int32_t flags,
const char *name,
int32_t nullary,
int32_t unary,
uint32_t op,
const char *doc) {
/* Variadic operator assembly. Must be templatized for each different opcode. */
/* Reg 0: Argument tuple (args) */
/* Reg 1: Argument count (argn) */
/* Reg 2: Jump flag (jump?) */
/* Reg 3: Accumulator (accum) */
/* Reg 4: Next operand (operand) */
/* Reg 5: Loop iterator (i) */
uint32_t varop_asm[] = {
SS(JOP_LENGTH, 1, 0), /* Put number of arguments in register 1 -> argn = count(args) */
/* Check nullary */
SSS(JOP_EQUALS_IMMEDIATE, 2, 1, 0), /* Check if numargs equal to 0 */
SI(JOP_JUMP_IF_NOT, 2, 3), /* If not 0, jump to next check */
/* Nullary */
SI(JOP_LOAD_INTEGER, 3, nullary), /* accum = nullary value */
S(JOP_RETURN, 3), /* return accum */
/* Check unary */
SSI(JOP_EQUALS_IMMEDIATE, 2, 1, 1), /* Check if numargs equal to 1 */
SI(JOP_JUMP_IF_NOT, 2, 5), /* If not 1, jump to next check */
/* Unary */
SI(JOP_LOAD_INTEGER, 3, unary), /* accum = unary value */
SSI(JOP_GET_INDEX, 4, 0, 0), /* operand = args[0] */
SSS(op, 3, 3, 4), /* accum = accum op operand */
S(JOP_RETURN, 3), /* return accum */
/* Mutli (2 or more) arity */
/* Prime loop */
SSI(JOP_GET_INDEX, 3, 0, 0), /* accum = args[0] */
SI(JOP_LOAD_INTEGER, 5, 1), /* i = 1 */
/* Main loop */
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) */
SI(JOP_JUMP_IF_NOT, 2, -4), /* if not jump? go back 4 */
/* Done, do last and return accumulator */
S(JOP_RETURN, 3) /* return accum */
};
janet_quick_asm(
env,
flags | JANET_FUNCDEF_FLAG_VARARG,
name,
0,
0,
INT32_MAX,
6,
varop_asm,
sizeof(varop_asm),
doc);
}
/* Templatize variadic comparators */
static void templatize_comparator(
JanetTable *env,
int32_t flags,
const char *name,
int invert,
uint32_t op,
const char *doc) {
/* Reg 0: Argument tuple (args) */
/* Reg 1: Argument count (argn) */
/* Reg 2: Jump flag (jump?) */
/* Reg 3: Last value (last) */
/* Reg 4: Next operand (next) */
/* Reg 5: Loop iterator (i) */
uint32_t comparator_asm[] = {
SS(JOP_LENGTH, 1, 0), /* Put number of arguments in register 1 -> argn = count(args) */
SSS(JOP_LESS_THAN_IMMEDIATE, 2, 1, 2), /* Check if numargs less than 2 */
SI(JOP_JUMP_IF, 2, 10), /* If numargs < 2, jump to done */
/* Prime loop */
SSI(JOP_GET_INDEX, 3, 0, 0), /* last = args[0] */
SI(JOP_LOAD_INTEGER, 5, 1), /* i = 1 */
/* Main loop */
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++ */
SS(JOP_MOVE_NEAR, 3, 4), /* last = next */
SSI(JOP_EQUALS, 2, 5, 1), /* jump? = (i == argn) */
SI(JOP_JUMP_IF_NOT, 2, -6), /* if not jump? go back 6 */
/* Done, return true */
S(invert ? JOP_LOAD_FALSE : JOP_LOAD_TRUE, 3),
S(JOP_RETURN, 3),
/* Failed, return false */
S(invert ? JOP_LOAD_TRUE : JOP_LOAD_FALSE, 3),
S(JOP_RETURN, 3)
};
janet_quick_asm(
env,
flags | JANET_FUNCDEF_FLAG_VARARG,
name,
0,
0,
INT32_MAX,
6,
comparator_asm,
sizeof(comparator_asm),
doc);
}
/* Make the apply function */
static void make_apply(JanetTable *env) {
/* Reg 0: Function (fun) */
/* Reg 1: Argument tuple (args) */
/* Reg 2: Argument count (argn) */
/* Reg 3: Jump flag (jump?) */
/* Reg 4: Loop iterator (i) */
/* Reg 5: Loop values (x) */
uint32_t apply_asm[] = {
SS(JOP_LENGTH, 2, 1),
SSS(JOP_EQUALS_IMMEDIATE, 3, 2, 0), /* Immediate tail call if no args */
SI(JOP_JUMP_IF, 3, 9),
/* Prime loop */
SI(JOP_LOAD_INTEGER, 4, 0), /* i = 0 */
/* Main loop */
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 */
S(JOP_PUSH, 5),
(JOP_JUMP | ((uint32_t)(-5) << 8)),
/* Push the array */
S(JOP_PUSH_ARRAY, 5),
/* Call the funciton */
S(JOP_TAILCALL, 0)
};
janet_quick_asm(env, JANET_FUN_APPLY | JANET_FUNCDEF_FLAG_VARARG,
"apply", 1, 1, INT32_MAX, 6, apply_asm, sizeof(apply_asm),
JDOC("(apply f & args)\n\n"
"Applies a function to a variable number of arguments. Each element in args "
"is used as an argument to f, except the last element in args, which is expected to "
"be an array-like. Each element in this last argument is then also pushed as an argument to "
"f. For example:\n\n"
"\t(apply + 1000 (range 10))\n\n"
"sums the first 10 integers and 1000."));
}
static const uint32_t error_asm[] = {
JOP_ERROR
};
static const uint32_t debug_asm[] = {
JOP_SIGNAL | (2 << 24),
JOP_RETURN
};
static const uint32_t yield_asm[] = {
JOP_SIGNAL | (3 << 24),
JOP_RETURN
};
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),
JOP_EQUALS | (3 << 8) | (3 << 24),
JOP_JUMP_IF | (3 << 8) | (2 << 16),
JOP_RETURN,
JOP_RETURN | (2 << 8)
};
static const uint32_t put_asm[] = {
JOP_PUT | (1 << 16) | (2 << 24),
JOP_RETURN
};
static const uint32_t length_asm[] = {
JOP_LENGTH,
JOP_RETURN
};
static const uint32_t bnot_asm[] = {
JOP_BNOT,
JOP_RETURN
};
static const uint32_t propagate_asm[] = {
JOP_PROPAGATE | (1 << 24),
JOP_RETURN
};
static const uint32_t next_asm[] = {
JOP_NEXT | (1 << 24),
JOP_RETURN
};
static const uint32_t modulo_asm[] = {
JOP_MODULO | (1 << 24),
JOP_RETURN
};
static const uint32_t remainder_asm[] = {
JOP_REMAINDER | (1 << 24),
JOP_RETURN
};
#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_quick_asm(env, JANET_FUN_MODULO,
"mod", 2, 2, 2, 2, modulo_asm, sizeof(modulo_asm),
JDOC("(mod dividend divisor)\n\n"
"Returns the modulo of dividend / divisor."));
janet_quick_asm(env, JANET_FUN_REMAINDER,
"%", 2, 2, 2, 2, remainder_asm, sizeof(remainder_asm),
JDOC("(% dividend divisor)\n\n"
"Returns the remainder of dividend / divisor."));
janet_quick_asm(env, JANET_FUN_NEXT,
"next", 2, 2, 2, 2, next_asm, sizeof(next_asm),
JDOC("(next ds &opt key)\n\n"
"Gets the next key in a datastructure. Can be used to iterate through "
"the keys of a data structure in an unspecified order. Keys are guaranteed "
"to be seen only once per iteration if they data structure is not mutated "
"during iteration. If key is nil, next returns the first key. If next "
"returns nil, there are no more keys to iterate through."));
janet_quick_asm(env, JANET_FUN_PROP,
"propagate", 2, 2, 2, 2, propagate_asm, sizeof(propagate_asm),
JDOC("(propagate x fiber)\n\n"
"Propagate a signal from a fiber to the current fiber. The resulting "
"stack trace from the current fiber will include frames from fiber. If "
"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", 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 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 &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."));
janet_quick_asm(env, JANET_FUN_RESUME,
"resume", 2, 1, 2, 2, resume_asm, sizeof(resume_asm),
JDOC("(resume fiber &opt x)\n\n"
"Resume a new or suspended fiber and optionally pass in a value to the fiber that "
"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(in_asm),
JDOC("(get ds key &opt dflt)\n\n"
"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"
"Associate a key with a value in any mutable associative data structure. Indexed data structures "
"(arrays and buffers) only accept non-negative integer keys, and will expand if an out of bounds "
"value is provided. In an array, extra space will be filled with nils, and in a buffer, extra "
"space will be filled with 0 bytes. In a table, putting a key that is contained in the table prototype "
"will hide the association defined by the prototype, but will not mutate the prototype table. Putting "
"a value nil into a table will remove the key from the table. Returns the data structure ds."));
janet_quick_asm(env, JANET_FUN_LENGTH,
"length", 1, 1, 1, 1, length_asm, sizeof(length_asm),
JDOC("(length ds)\n\n"
"Returns the length or count of a data structure in constant time as an integer. For "
"structs and tables, returns the number of key-value pairs in the data structure."));
janet_quick_asm(env, JANET_FUN_BNOT,
"bnot", 1, 1, 1, 1, bnot_asm, sizeof(bnot_asm),
JDOC("(bnot x)\n\nReturns the bit-wise inverse of integer x."));
make_apply(env);
/* Variadic ops */
templatize_varop(env, JANET_FUN_ADD, "+", 0, 0, JOP_ADD,
JDOC("(+ & xs)\n\n"
"Returns the sum of all xs. xs must be integers or real numbers only. If xs is empty, return 0."));
templatize_varop(env, JANET_FUN_SUBTRACT, "-", 0, 0, JOP_SUBTRACT,
JDOC("(- & xs)\n\n"
"Returns the difference of xs. If xs is empty, returns 0. If xs has one element, returns the "
"negative value of that element. Otherwise, returns the first element in xs minus the sum of "
"the rest of the elements."));
templatize_varop(env, JANET_FUN_MULTIPLY, "*", 1, 1, JOP_MULTIPLY,
JDOC("(* & xs)\n\n"
"Returns the product of all elements in xs. If xs is empty, returns 1."));
templatize_varop(env, JANET_FUN_DIVIDE, "/", 1, 1, JOP_DIVIDE,
JDOC("(/ & xs)\n\n"
"Returns the quotient of xs. If xs is empty, returns 1. If xs has one value x, returns "
"the reciprocal of x. Otherwise return the first value of xs repeatedly divided by the remaining "
"values. Division by two integers uses truncating division."));
templatize_varop(env, JANET_FUN_BAND, "band", -1, -1, JOP_BAND,
JDOC("(band & xs)\n\n"
"Returns the bit-wise and of all values in xs. Each x in xs must be an integer."));
templatize_varop(env, JANET_FUN_BOR, "bor", 0, 0, JOP_BOR,
JDOC("(bor & xs)\n\n"
"Returns the bit-wise or of all values in xs. Each x in xs must be an integer."));
templatize_varop(env, JANET_FUN_BXOR, "bxor", 0, 0, JOP_BXOR,
JDOC("(bxor & xs)\n\n"
"Returns the bit-wise xor of all values in xs. Each in xs must be an integer."));
templatize_varop(env, JANET_FUN_LSHIFT, "blshift", 1, 1, JOP_SHIFT_LEFT,
JDOC("(blshift x & shifts)\n\n"
"Returns the value of x bit shifted left by the sum of all values in shifts. x "
"and each element in shift must be an integer."));
templatize_varop(env, JANET_FUN_RSHIFT, "brshift", 1, 1, JOP_SHIFT_RIGHT,
JDOC("(brshift x & shifts)\n\n"
"Returns the value of x bit shifted right by the sum of all values in shifts. x "
"and each element in shift must be an integer."));
templatize_varop(env, JANET_FUN_RSHIFTU, "brushift", 1, 1, JOP_SHIFT_RIGHT_UNSIGNED,
JDOC("(brushift x & shifts)\n\n"
"Returns the value of x bit shifted right by the sum of all values in shifts. x "
"and each element in shift must be an integer. The sign of x is not preserved, so "
"for positive shifts the return value will always be positive."));
/* Variadic comparators */
templatize_comparator(env, JANET_FUN_GT, ">", 0, JOP_GREATER_THAN,
JDOC("(> & xs)\n\n"
"Check if xs is in descending order. Returns a boolean."));
templatize_comparator(env, JANET_FUN_LT, "<", 0, JOP_LESS_THAN,
JDOC("(< & xs)\n\n"
"Check if xs is in ascending order. Returns a boolean."));
templatize_comparator(env, JANET_FUN_GTE, ">=", 0, JOP_GREATER_THAN_EQUAL,
JDOC("(>= & xs)\n\n"
"Check if xs is in non-ascending order. Returns a boolean."));
templatize_comparator(env, JANET_FUN_LTE, "<=", 0, JOP_LESS_THAN_EQUAL,
JDOC("(<= & xs)\n\n"
"Check if xs is in non-descending order. Returns a boolean."));
templatize_comparator(env, JANET_FUN_EQ, "=", 0, JOP_EQUALS,
JDOC("(= & xs)\n\n"
"Check if all values in xs are equal. Returns a boolean."));
templatize_comparator(env, JANET_FUN_NEQ, "not=", 1, JOP_EQUALS,
JDOC("(not= & xs)\n\n"
"Check if any values in xs are not equal. Returns a boolean."));
/* Platform detection */
janet_def(env, "janet/version", janet_cstringv(JANET_VERSION),
JDOC("The version number of the running janet program."));
janet_def(env, "janet/build", janet_cstringv(JANET_BUILD),
JDOC("The build identifier of the running janet program."));
janet_def(env, "janet/config-bits", janet_wrap_integer(JANET_CURRENT_CONFIG_BITS),
JDOC("The flag set of config options from janetconf.h which is used to check "
"if native modules are compatible with the host program."));
/* Allow references to the environment */
janet_def(env, "_env", janet_wrap_table(env), JDOC("The environment table for the current scope."));
janet_load_libs(env);
janet_gcroot(janet_wrap_table(env));
return env;
}
#else
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,
dict,
NULL);
/* Memoize */
janet_gcroot(marsh_out);
JanetTable *env = janet_unwrap_table(marsh_out);
janet_vm_core_env = env;
return env;
}
#endif
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