mirror of https://github.com/janet-lang/janet
241 lines
7.1 KiB
C
241 lines
7.1 KiB
C
/*
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* Copyright (c) 2017 Calvin Rose
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to
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* deal in the Software without restriction, including without limitation the
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* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*/
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#ifndef JANET_COMPILE_H
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#define JANET_COMPILE_H
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#include <janet/janet.h>
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#include "regalloc.h"
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/* Tags for some functions for the prepared inliner */
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#define JANET_FUN_DEBUG 1
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#define JANET_FUN_ERROR 2
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#define JANET_FUN_APPLY 3
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#define JANET_FUN_YIELD 4
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#define JANET_FUN_RESUME 5
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#define JANET_FUN_GET 6
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#define JANET_FUN_PUT 7
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#define JANET_FUN_LENGTH 8
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#define JANET_FUN_ADD 9
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#define JANET_FUN_SUBTRACT 10
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#define JANET_FUN_MULTIPLY 11
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#define JANET_FUN_DIVIDE 12
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#define JANET_FUN_BAND 13
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#define JANET_FUN_BOR 14
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#define JANET_FUN_BXOR 15
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#define JANET_FUN_LSHIFT 16
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#define JANET_FUN_RSHIFT 17
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#define JANET_FUN_RSHIFTU 18
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#define JANET_FUN_BNOT 19
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#define JANET_FUN_ORDER_GT 20
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#define JANET_FUN_ORDER_LT 21
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#define JANET_FUN_ORDER_GTE 22
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#define JANET_FUN_ORDER_LTE 23
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#define JANET_FUN_ORDER_EQ 24
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#define JANET_FUN_ORDER_NEQ 25
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#define JANET_FUN_GT 26
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#define JANET_FUN_LT 27
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#define JANET_FUN_GTE 28
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#define JANET_FUN_LTE 29
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#define JANET_FUN_EQ 30
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#define JANET_FUN_NEQ 31
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/* Compiler typedefs */
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typedef struct JanetCompiler JanetCompiler;
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typedef struct FormOptions FormOptions;
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typedef struct SlotTracker SlotTracker;
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typedef struct JanetScope JanetScope;
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typedef struct JanetSlot JanetSlot;
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typedef struct JanetFopts JanetFopts;
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typedef struct JanetFunOptimizer JanetFunOptimizer;
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typedef struct JanetSpecial JanetSpecial;
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#define JANET_SLOT_CONSTANT 0x10000
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#define JANET_SLOT_NAMED 0x20000
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#define JANET_SLOT_MUTABLE 0x40000
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#define JANET_SLOT_REF 0x80000
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#define JANET_SLOT_RETURNED 0x100000
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/* Needed for handling single element arrays as global vars. */
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#define JANET_SLOTTYPE_ANY 0xFFFF
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/* A stack slot */
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struct JanetSlot {
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Janet constant; /* If the slot has a constant value */
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int32_t index;
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int32_t envindex; /* 0 is local, positive number is an upvalue */
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uint32_t flags;
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};
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#define JANET_SCOPE_FUNCTION 1
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#define JANET_SCOPE_ENV 2
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#define JANET_SCOPE_TOP 4
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#define JANET_SCOPE_UNUSED 8
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#define JANET_SCOPE_CLOSURE 16
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/* A symbol and slot pair */
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typedef struct SymPair {
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JanetSlot slot;
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const uint8_t *sym;
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int keep;
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} SymPair;
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/* A lexical scope during compilation */
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struct JanetScope {
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/* For debugging */
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const char *name;
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/* Scopes are doubly linked list */
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JanetScope *parent;
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JanetScope *child;
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/* Constants for this funcdef */
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Janet *consts;
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/* Map of symbols to slots. Use a simple linear scan for symbols. */
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SymPair *syms;
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/* FuncDefs */
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JanetFuncDef **defs;
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/* Regsiter allocator */
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JanetcRegisterAllocator ra;
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/* Referenced closure environents. The values at each index correspond
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* to which index to get the environment from in the parent. The environment
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* that corresponds to the direct parent's stack will always have value 0. */
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int32_t *envs;
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/* Where to add reference to self in constants */
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int32_t selfconst;
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int32_t bytecode_start;
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int flags;
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};
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/* Compilation state */
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struct JanetCompiler {
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/* Pointer to current scope */
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JanetScope *scope;
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uint32_t *buffer;
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JanetSourceMapping *mapbuffer;
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/* Hold the environment */
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JanetTable *env;
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/* Name of source to attach to generated functions */
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const uint8_t *source;
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/* The result of compilation */
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JanetCompileResult result;
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/* Keep track of where we are in the source */
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JanetSourceMapping current_mapping;
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/* Prevent unbounded recursion */
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int recursion_guard;
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};
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#define JANET_FOPTS_TAIL 0x10000
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#define JANET_FOPTS_HINT 0x20000
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#define JANET_FOPTS_DROP 0x40000
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/* Options for compiling a single form */
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struct JanetFopts {
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JanetCompiler *compiler;
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JanetSlot hint;
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uint32_t flags; /* bit set of accepted primitive types */
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};
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/* Get the default form options */
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JanetFopts janetc_fopts_default(JanetCompiler *c);
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/* For optimizing builtin normal functions. */
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struct JanetFunOptimizer {
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int (*can_optimize)(JanetFopts opts, JanetSlot *args);
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JanetSlot (*optimize)(JanetFopts opts, JanetSlot *args);
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};
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/* A grouping of a named special and the corresponding compiler fragment */
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struct JanetSpecial {
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const char *name;
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JanetSlot (*compile)(JanetFopts opts, int32_t argn, const Janet *argv);
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};
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/****************************************************/
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/* Get an optimizer if it exists, otherwise NULL */
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const JanetFunOptimizer *janetc_funopt(uint32_t flags);
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/* Get a special. Return NULL if none exists */
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const JanetSpecial *janetc_special(const uint8_t *name);
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void janetc_freeslot(JanetCompiler *c, JanetSlot s);
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void janetc_nameslot(JanetCompiler *c, const uint8_t *sym, JanetSlot s);
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JanetSlot janetc_farslot(JanetCompiler *c);
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/* Throw away some code after checking that it is well formed. */
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void janetc_throwaway(JanetFopts opts, Janet x);
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/* Get a target slot for emitting an instruction. Will always return
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* a local slot. */
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JanetSlot janetc_gettarget(JanetFopts opts);
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/* Get a bunch of slots for function arguments */
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JanetSlot *janetc_toslots(JanetCompiler *c, const Janet *vals, int32_t len);
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/* Get a bunch of slots for function arguments */
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JanetSlot *janetc_toslotskv(JanetCompiler *c, Janet ds);
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/* Push slots load via janetc_toslots. */
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void janetc_pushslots(JanetCompiler *c, JanetSlot *slots);
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/* Free slots loaded via janetc_toslots */
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void janetc_freeslots(JanetCompiler *c, JanetSlot *slots);
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/* Generate the return instruction for a slot. */
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JanetSlot janetc_return(JanetCompiler *c, JanetSlot s);
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/* Store an error */
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void janetc_error(JanetCompiler *c, const uint8_t *m);
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void janetc_cerror(JanetCompiler *c, const char *m);
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/* Dispatch to correct form compiler */
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JanetSlot janetc_value(JanetFopts opts, Janet x);
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/* Push and pop from the scope stack */
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void janetc_scope(JanetScope *s, JanetCompiler *c, int flags, const char *name);
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void janetc_popscope(JanetCompiler *c);
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void janetc_popscope_keepslot(JanetCompiler *c, JanetSlot retslot);
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JanetFuncDef *janetc_pop_funcdef(JanetCompiler *c);
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/* Create a destory slots */
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JanetSlot janetc_cslot(Janet x);
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/* Search for a symbol */
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JanetSlot janetc_resolve(JanetCompiler *c, const uint8_t *sym);
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#endif
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