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Code Issues 1 Releases Wiki Activity

Rename everything to be prefixed with gst. No particluar meaning

Browse Source 
or reason for that name, but its available and it irked me to see
non prefixed c code for something that is supposed to be emeddable.
This commit is contained in:
Calvin Rose 2017-02-15 21:02:00 -05:00
parent 8cdc0610e3
commit 6677dff337
14 changed files with 1407 additions and 1422 deletions
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826
compile.c
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File diff suppressed because it is too large Load Diff

10
compile.h
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@ -4,21 +4,21 @@
#include "datatypes.h"
/* Initialize the Compiler */
void CompilerInit(Compiler * c, VM * vm);
void gst_compiler(GstCompiler *c, Gst *vm);
/* Register a global for the compilation environment. */
void CompilerAddGlobal(Compiler * c, const char * name, Value x);
void gst_compiler_add_global(GstCompiler *c, const char *name, GstValue x);
/* Register a global c function for the compilation environment. */
void CompilerAddGlobalCFunc(Compiler * c, const char * name, CFunction f);
void gst_compiler_add_global_cfunction(GstCompiler *c, const char *name, GstCFunction f);
/* Compile a function that evaluates the given form. */
Func * CompilerCompile(Compiler * c, Value form);
GstFunction *gst_compiler_compile(GstCompiler *c, GstValue form);
/* Macro expansion. Macro expansion happens prior to the compilation process
* and is completely separate. This allows the compilation to not have to worry
* about garbage collection and other issues that would complicate both the
* runtime and the compilation. */
int CompileMacroExpand(VM * vm, Value x, Dictionary * macros, Value * out);
int gst_macro_expand(Gst *vm, GstValue x, GstObject *macros, GstValue *out);
#endif /* end of include guard: COMPILE_H_9VXF71HY */

313
datatypes.h
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@ -4,227 +4,234 @@
#include <stdint.h>
#include <setjmp.h>
typedef enum Type {
TYPE_NIL = 0,
TYPE_NUMBER,
TYPE_BOOLEAN,
TYPE_STRING,
TYPE_ARRAY,
TYPE_THREAD,
TYPE_BYTEBUFFER,
TYPE_FUNCTION,
TYPE_CFUNCTION,
TYPE_DICTIONARY
} Type;
typedef enum GstType {
GST_NIL = 0,
GST_NUMBER,
GST_BOOLEAN,
GST_STRING,
GST_ARRAY,
GST_THREAD,
GST_BYTEBUFFER,
GST_FUNCTION,
GST_CFUNCTION,
GST_OBJECT
} GstType;
typedef double Number;
typedef uint8_t Boolean;
typedef struct VM VM;
typedef struct Value Value;
typedef Value (*CFunction)(VM * vm);
typedef struct Func Func;
typedef struct FuncDef FuncDef;
typedef struct FuncEnv FuncEnv;
typedef union ValueData ValueData;
typedef struct DictBucket DictBucket;
typedef struct Array Array;
typedef struct Buffer Buffer;
typedef struct Dictionary Dictionary;
typedef struct DictionaryIterator DictionaryIterator;
typedef struct Parser Parser;
typedef struct ParseState ParseState;
typedef struct Scope Scope;
typedef struct Compiler Compiler;
typedef struct Thread Thread;
typedef struct StackFrame StackFrame;
/* The state of the virtual machine */
typedef struct Gst Gst;
union ValueData {
Boolean boolean;
Number number;
uint8_t * string;
Array * array;
Buffer * buffer;
Dictionary * dict;
Func * func;
Thread * thread;
void * pointer;
CFunction cfunction;
uint16_t u16[4];
uint8_t u8[8];
} data;
/* A general gst value type */
typedef struct GstValue GstValue;
struct Value {
Type type;
ValueData data;
/* All of the gst types */
typedef double GstNumber;
typedef uint8_t GstBoolean;
typedef struct GstFunction GstFunction;
typedef struct GstArray GstArray;
typedef struct GstBuffer GstBuffer;
typedef struct GstObject GstObject;
typedef struct GstThread GstThread;
typedef GstValue (*GstCFunction)(Gst * vm);
/* Implementation details */
typedef struct GstParser GstParser;
typedef struct GstCompiler GstCompiler;
typedef struct GstFuncDef GstFuncDef;
typedef struct GstFuncEnv GstFuncEnv;
/* Definitely implementation details */
typedef struct GstStackFrame GstStackFrame;
typedef struct GstParseState GstParseState;
typedef struct GstBucket GstBucket;
typedef struct GstScope GstScope;
/* The general gst value type. Contains a large union and
* the type information of the value */
struct GstValue {
GstType type;
union {
/* The various types */
GstBoolean boolean;
GstNumber number;
GstArray *array;
GstBuffer *buffer;
GstObject *object;
GstThread *thread;
GstCFunction cfunction;
GstFunction *function;
uint8_t *string;
void *pointer;
} data;
};
struct Thread {
/* A lightweight thread in gst. Does not correspond to
* operating system threads. Used in coroutines. */
struct GstThread {
uint32_t count;
uint32_t capacity;
Value * data;
GstValue *data;
enum {
THREAD_PENDING = 0,
THREAD_ALIVE,
TRHEAD_DEAD
GST_THREAD_PENDING = 0,
GST_THREAD_ALIVE,
GST_TRHEAD_DEAD
} status;
};
struct Array {
/* A dynamic array type */
struct GstArray {
uint32_t count;
uint32_t capacity;
Value * data;
GstValue *data;
uint32_t flags;
};
struct Buffer {
/* A bytebuffer type. Used as a mutable string or string builder. */
struct GstBuffer {
uint32_t count;
uint32_t capacity;
uint8_t * data;
uint8_t *data;
uint32_t flags;
};
struct Dictionary {
/* The main Gst type, an obect. Objects are just hashtables with some meta
* information attached in the meta value */
struct GstObject {
uint32_t count;
uint32_t capacity;
DictBucket ** buckets;
GstBucket **buckets;
uint32_t flags;
Value meta;
GstValue meta;
};
struct DictionaryIterator {
Dictionary * dict;
uint32_t index;
DictBucket * bucket;
};
struct FuncDef {
/* A function defintion. Contains information need to instatiate closures. */
struct GstFuncDef {
uint32_t locals;
uint32_t arity;
uint32_t literalsLen;
uint32_t byteCodeLen;
Value * literals; /* Contains strings, FuncDefs, etc. */
uint16_t * byteCode;
GstValue *literals; /* Contains strings, FuncDefs, etc. */
uint16_t *byteCode;
};
struct FuncEnv {
Thread * thread; /* When nil, index the local values */
/* A fuction environment */
struct GstFuncEnv {
GstThread *thread; /* When nil, index the local values */
uint32_t stackOffset; /* Used as environment size when off stack */
Value * values;
GstValue *values;
};
struct Func {
FuncDef * def;
FuncEnv * env;
Func * parent;
/* A function */
struct GstFunction {
GstFuncDef *def;
GstFuncEnv *env;
GstFunction *parent;
};
struct DictBucket {
Value key;
Value value;
DictBucket * next;
/* A hash table bucket in an object */
struct GstBucket {
GstValue key;
GstValue value;
GstBucket *next;
};
struct StackFrame {
Value callee;
/* A stack frame in the VM */
struct GstStackFrame {
GstValue callee;
uint16_t size;
uint16_t prevSize;
uint16_t ret;
FuncEnv * env;
uint16_t * pc;
GstFuncEnv *env;
uint16_t *pc;
};
struct VM {
/* The VM state */
struct Gst {
/* Garbage collection */
void * blocks;
void *blocks;
uint32_t memoryInterval;
uint32_t nextCollection;
uint32_t black : 1;
uint32_t lock : 31;
/* Thread */
uint16_t * pc;
Thread * thread;
Value * base;
StackFrame * frame;
uint16_t *pc;
GstThread *thread;
GstValue *base;
GstStackFrame *frame;
/* Return state */
const char * error;
const char *error;
jmp_buf jump;
Value ret; /* Returned value from VMStart */
GstValue ret; /* Returned value from VMStart */
/* Object definitions */
Value metas[TYPE_DICTIONARY];
GstValue metas[GST_OBJECT];
};
/* Parsing */
struct Parser {
VM * vm;
const char * error;
ParseState * data;
Value value;
struct GstParser {
Gst *vm;
const char *error;
GstParseState *data;
GstValue value;
uint32_t count;
uint32_t cap;
uint32_t index;
enum {
PARSER_PENDING = 0,
PARSER_FULL,
PARSER_ERROR
GST_PARSER_PENDING = 0,
GST_PARSER_FULL,
GST_PARSER_ERROR
} status;
};
/* Compiling */
struct Compiler {
VM * vm;
const char * error;
/* Compilation state */
struct GstCompiler {
Gst *vm;
const char *error;
jmp_buf onError;
Scope * tail;
Array * env;
Buffer * buffer;
GstScope *tail;
GstArray *env;
GstBuffer *buffer;
};
/* String utils */
#define VStringRaw(s) ((uint32_t *)(s) - 2)
#define VStringSize(v) (VStringRaw(v)[0])
#define VStringHash(v) (VStringRaw(v)[1])
#define gst_string_raw(s) ((uint32_t *)(s) - 2)
#define gst_string_length(v) (gst_string_raw(v)[0])
#define gst_string_hash(v) (gst_string_raw(v)[1])
/* Bytecode */
enum OpCode {
VM_OP_ADD = 0, /* 0x0000 */
VM_OP_SUB, /* 0x0001 */
VM_OP_MUL, /* 0x0002 */
VM_OP_DIV, /* 0x0003 */
VM_OP_NOT, /* 0x0004 */
VM_OP_LD0, /* 0x0005 */
VM_OP_LD1, /* 0x0006 */
VM_OP_FLS, /* 0x0007 */
VM_OP_TRU, /* 0x0008 */
VM_OP_NIL, /* 0x0009 */
VM_OP_I16, /* 0x000a */
VM_OP_UPV, /* 0x000b */
VM_OP_JIF, /* 0x000c */
VM_OP_JMP, /* 0x000d */
VM_OP_CAL, /* 0x000e */
VM_OP_RET, /* 0x000f */
VM_OP_SUV, /* 0x0010 */
VM_OP_CST, /* 0x0011 */
VM_OP_I32, /* 0x0012 */
VM_OP_F64, /* 0x0013 */
VM_OP_MOV, /* 0x0014 */
VM_OP_CLN, /* 0x0015 */
VM_OP_EQL, /* 0x0016 */
VM_OP_LTN, /* 0x0017 */
VM_OP_LTE, /* 0x0018 */
VM_OP_ARR, /* 0x0019 */
VM_OP_DIC, /* 0x001a */
VM_OP_TCL, /* 0x001b */
VM_OP_ADM, /* 0x001c */
VM_OP_SBM, /* 0x001d */
VM_OP_MUM, /* 0x001e */
VM_OP_DVM, /* 0x001f */
VM_OP_RTN, /* 0x0020 */
VM_OP_SET, /* 0x0021 */
VM_OP_GET /* 0x0022 */
enum GstOpCode {
GST_OP_ADD = 0, /* 0x0000 */
GST_OP_SUB, /* 0x0001 */
GST_OP_MUL, /* 0x0002 */
GST_OP_DIV, /* 0x0003 */
GST_OP_NOT, /* 0x0004 */
GST_OP_LD0, /* 0x0005 */
GST_OP_LD1, /* 0x0006 */
GST_OP_FLS, /* 0x0007 */
GST_OP_TRU, /* 0x0008 */
GST_OP_NIL, /* 0x0009 */
GST_OP_I16, /* 0x000a */
GST_OP_UPV, /* 0x000b */
GST_OP_JIF, /* 0x000c */
GST_OP_JMP, /* 0x000d */
GST_OP_CAL, /* 0x000e */
GST_OP_RET, /* 0x000f */
GST_OP_SUV, /* 0x0010 */
GST_OP_CST, /* 0x0011 */
GST_OP_I32, /* 0x0012 */
GST_OP_F64, /* 0x0013 */
GST_OP_MOV, /* 0x0014 */
GST_OP_CLN, /* 0x0015 */
GST_OP_EQL, /* 0x0016 */
GST_OP_LTN, /* 0x0017 */
GST_OP_LTE, /* 0x0018 */
GST_OP_ARR, /* 0x0019 */
GST_OP_DIC, /* 0x001a */
GST_OP_TCL, /* 0x001b */
GST_OP_ADM, /* 0x001c */
GST_OP_SBM, /* 0x001d */
GST_OP_MUM, /* 0x001e */
GST_OP_DVM, /* 0x001f */
GST_OP_RTN, /* 0x0020 */
GST_OP_SET, /* 0x0021 */
GST_OP_GET /* 0x0022 */
};
#endif

212
disasm.c
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@ -4,17 +4,17 @@
#define OP_WIDTH 20
/* Print various register and arguments to instructions */
static void dasmPrintSlot(FILE * out, uint16_t index) { fprintf(out, "%d ", index); }
static void dasmPrintI16(FILE * out, int16_t number) { fprintf(out, "#%d ", number); }
static void dasmPrintI32(FILE * out, int32_t number) { fprintf(out, "#%d ", number); }
static void dasmPrintF64(FILE * out, double number) { fprintf(out, "#%f ", number); }
static void dasmPrintLiteral(FILE * out, uint16_t index) { fprintf(out, "(%d) ", index); }
static void dasmPrintUpValue(FILE * out, uint16_t level, uint16_t index) {
static void dasm_print_slot(FILE * out, uint16_t index) { fprintf(out, "%d ", index); }
static void dasm_print_i16(FILE * out, int16_t number) { fprintf(out, "#%d ", number); }
static void dasm_print_i32(FILE * out, int32_t number) { fprintf(out, "#%d ", number); }
static void dasm_print_f64(FILE * out, double number) { fprintf(out, "#%f ", number); }
static void dasm_print_literal(FILE * out, uint16_t index) { fprintf(out, "(%d) ", index); }
static void dasm_print_upvalue(FILE * out, uint16_t level, uint16_t index) {
fprintf(out, "<%d, %d> ", level, index);
}
/* Print the name of the argument but pad it */
static void dasmPrintArg(FILE * out, const char * name) {
static void dasm_print_arg(FILE * out, const char * name) {
uint32_t i = 0;
char c;
while ((c = *name++)) {
@ -26,44 +26,44 @@ static void dasmPrintArg(FILE * out, const char * name) {
}
/* Print instructions that take a fixed number of arguments */
static uint32_t dasmPrintFixedOp(FILE * out, const uint16_t * current,
static uint32_t dasm_fixed_op(FILE * out, const uint16_t * current,
const char * name, uint32_t size) {
uint32_t i;
dasmPrintArg(out, name);
dasm_print_arg(out, name);
for (i = 1; i <= size; ++i) {
dasmPrintSlot(out, current[i]);
dasm_print_slot(out, current[i]);
}
return size + 1;
}
/* Print instructions that take a variable number of arguments */
static uint32_t dasmPrintVarArgOp(FILE * out, const uint16_t * current,
static uint32_t dasm_varg_op(FILE * out, const uint16_t * current,
const char * name, uint32_t extra) {
uint32_t i, argCount;
dasmPrintArg(out, name);
dasm_print_arg(out, name);
for (i = 0; i < extra; ++i) {
dasmPrintSlot(out, current[i + 1]);
dasm_print_slot(out, current[i + 1]);
}
argCount = current[extra + 1];
fprintf(out, ": "); /* Argument separator */
for (i = 0; i < argCount; ++i) {
dasmPrintSlot(out, current[i + extra + 2]);
dasm_print_slot(out, current[i + extra + 2]);
}
return argCount + extra + 2;
}
/* Print the disassembly for a function definition */
void dasmFuncDef(FILE * out, FuncDef * def) {
dasm(out, def->byteCode, def->byteCodeLen);
void gst_dasm_funcdef(FILE * out, GstFuncDef * def) {
gst_dasm(out, def->byteCode, def->byteCodeLen);
}
/* Print the disassembly for a function */
void dasmFunc(FILE * out, Func * f) {
dasm(out, f->def->byteCode, f->def->byteCodeLen);
void gst_dasm_function(FILE * out, GstFunction * f) {
gst_dasm(out, f->def->byteCode, f->def->byteCodeLen);
}
/* Disassemble some bytecode and display it as opcode + arguments assembly */
void dasm(FILE * out, uint16_t *byteCode, uint32_t len) {
void gst_dasm(FILE * out, uint16_t *byteCode, uint32_t len) {
uint16_t *current = byteCode;
uint16_t *end = byteCode + len;
@ -71,136 +71,136 @@ void dasm(FILE * out, uint16_t *byteCode, uint32_t len) {
while (current < end) {
switch (*current) {
case VM_OP_ADD:
current += dasmPrintFixedOp(out, current, "add", 3);
case GST_OP_ADD:
current += dasm_fixed_op(out, current, "add", 3);
break;
case VM_OP_SUB:
current += dasmPrintFixedOp(out, current, "sub", 3);
case GST_OP_SUB:
current += dasm_fixed_op(out, current, "sub", 3);
break;
case VM_OP_MUL:
current += dasmPrintFixedOp(out, current, "mul", 3);
case GST_OP_MUL:
current += dasm_fixed_op(out, current, "mul", 3);
break;
case VM_OP_DIV:
current += dasmPrintFixedOp(out, current, "div", 3);
case GST_OP_DIV:
current += dasm_fixed_op(out, current, "div", 3);
break;
case VM_OP_NOT:
current += dasmPrintFixedOp(out, current, "not", 2);
case GST_OP_NOT:
current += dasm_fixed_op(out, current, "not", 2);
break;
case VM_OP_LD0:
current += dasmPrintFixedOp(out, current, "load0", 1);
case GST_OP_LD0:
current += dasm_fixed_op(out, current, "load0", 1);
break;
case VM_OP_LD1:
current += dasmPrintFixedOp(out, current, "load1", 1);
case GST_OP_LD1:
current += dasm_fixed_op(out, current, "load1", 1);
break;
case VM_OP_FLS:
current += dasmPrintFixedOp(out, current, "loadFalse", 1);
case GST_OP_FLS:
current += dasm_fixed_op(out, current, "loadFalse", 1);
break;
case VM_OP_TRU:
current += dasmPrintFixedOp(out, current, "loadTrue", 1);
case GST_OP_TRU:
current += dasm_fixed_op(out, current, "loadTrue", 1);
break;
case VM_OP_NIL:
current += dasmPrintFixedOp(out, current, "loadNil", 1);
case GST_OP_NIL:
current += dasm_fixed_op(out, current, "loadNil", 1);
break;
case VM_OP_I16:
dasmPrintArg(out, "loadInt16");
dasmPrintSlot(out, current[1]);
dasmPrintI16(out, ((int16_t *)current)[2]);
case GST_OP_I16:
dasm_print_arg(out, "loadInt16");
dasm_print_slot(out, current[1]);
dasm_print_i16(out, ((int16_t *)current)[2]);
current += 3;
break;
case VM_OP_UPV:
dasmPrintArg(out, "loadUpValue");
dasmPrintSlot(out, current[1]);
dasmPrintUpValue(out, current[2], current[3]);
case GST_OP_UPV:
dasm_print_arg(out, "loadUpValue");
dasm_print_slot(out, current[1]);
dasm_print_upvalue(out, current[2], current[3]);
current += 4;
break;
case VM_OP_JIF:
dasmPrintArg(out, "jumpIf");
dasmPrintSlot(out, current[1]);
dasmPrintI32(out, ((int32_t *)(current + 2))[0]);
case GST_OP_JIF:
dasm_print_arg(out, "jumpIf");
dasm_print_slot(out, current[1]);
dasm_print_i32(out, ((int32_t *)(current + 2))[0]);
current += 4;
break;
case VM_OP_JMP:
dasmPrintArg(out, "jump");
dasmPrintI32(out, ((int32_t *)(current + 1))[0]);
case GST_OP_JMP:
dasm_print_arg(out, "jump");
dasm_print_i32(out, ((int32_t *)(current + 1))[0]);
current += 3;
break;
case VM_OP_CAL:
current += dasmPrintVarArgOp(out, current, "call", 2);
case GST_OP_CAL:
current += dasm_varg_op(out, current, "call", 2);
break;
case VM_OP_RET:
current += dasmPrintFixedOp(out, current, "return", 1);
case GST_OP_RET:
current += dasm_fixed_op(out, current, "return", 1);
break;
case VM_OP_SUV:
dasmPrintArg(out, "setUpValue");
dasmPrintSlot(out, current[1]);
dasmPrintUpValue(out, current[2], current[3]);
case GST_OP_SUV:
dasm_print_arg(out, "setUpValue");
dasm_print_slot(out, current[1]);
dasm_print_upvalue(out, current[2], current[3]);
current += 4;
break;
case VM_OP_CST:
dasmPrintArg(out, "loadLiteral");
dasmPrintSlot(out, current[1]);
dasmPrintLiteral(out, current[2]);
case GST_OP_CST:
dasm_print_arg(out, "loadLiteral");
dasm_print_slot(out, current[1]);
dasm_print_literal(out, current[2]);
current += 3;
break;
case VM_OP_I32:
dasmPrintArg(out, "loadInt32");
dasmPrintSlot(out, current[1]);
dasmPrintI32(out, ((int32_t *)(current + 2))[0]);
case GST_OP_I32:
dasm_print_arg(out, "loadInt32");
dasm_print_slot(out, current[1]);
dasm_print_i32(out, ((int32_t *)(current + 2))[0]);
current += 4;
break;
case VM_OP_F64:
dasmPrintArg(out, "loadFloat64");
dasmPrintSlot(out, current[1]);
dasmPrintF64(out, ((double *)(current + 2))[0]);
case GST_OP_F64:
dasm_print_arg(out, "loadFloat64");
dasm_print_slot(out, current[1]);
dasm_print_f64(out, ((double *)(current + 2))[0]);
current += 6;
break;
case VM_OP_MOV:
current += dasmPrintFixedOp(out, current, "move", 2);
case GST_OP_MOV:
current += dasm_fixed_op(out, current, "move", 2);
break;
case VM_OP_CLN:
dasmPrintArg(out, "makeClosure");
dasmPrintSlot(out, current[1]);
dasmPrintLiteral(out, current[2]);
case GST_OP_CLN:
dasm_print_arg(out, "makeClosure");
dasm_print_slot(out, current[1]);
dasm_print_literal(out, current[2]);
current += 3;
break;
case VM_OP_EQL:
current += dasmPrintFixedOp(out, current, "equals", 3);
case GST_OP_EQL:
current += dasm_fixed_op(out, current, "equals", 3);
break;
case VM_OP_LTN:
current += dasmPrintFixedOp(out, current, "lessThan", 3);
case GST_OP_LTN:
current += dasm_fixed_op(out, current, "lessThan", 3);
break;
case VM_OP_LTE:
current += dasmPrintFixedOp(out, current, "lessThanEquals", 3);
case GST_OP_LTE:
current += dasm_fixed_op(out, current, "lessThanEquals", 3);
break;
case VM_OP_ARR:
current += dasmPrintVarArgOp(out, current, "array", 1);
case GST_OP_ARR:
current += dasm_varg_op(out, current, "array", 1);
break;
case VM_OP_DIC:
current += dasmPrintVarArgOp(out, current, "dictionary", 1);
case GST_OP_DIC:
current += dasm_varg_op(out, current, "dictionary", 1);
break;
case VM_OP_TCL:
current += dasmPrintVarArgOp(out, current, "tailCall", 1);
case GST_OP_TCL:
current += dasm_varg_op(out, current, "tailCall", 1);
break;
case VM_OP_ADM:
current += dasmPrintVarArgOp(out, current, "addMultiple", 1);
case GST_OP_ADM:
current += dasm_varg_op(out, current, "addMultiple", 1);
break;
case VM_OP_SBM:
current += dasmPrintVarArgOp(out, current, "subMultiple", 1);
case GST_OP_SBM:
current += dasm_varg_op(out, current, "subMultiple", 1);
break;
case VM_OP_MUM:
current += dasmPrintVarArgOp(out, current, "mulMultiple", 1);
case GST_OP_MUM:
current += dasm_varg_op(out, current, "mulMultiple", 1);
break;
case VM_OP_DVM:
current += dasmPrintVarArgOp(out, current, "divMultiple", 1);
case GST_OP_DVM:
current += dasm_varg_op(out, current, "divMultiple", 1);
break;
case VM_OP_RTN:
current += dasmPrintFixedOp(out, current, "returnNil", 0);
case GST_OP_RTN:
current += dasm_fixed_op(out, current, "returnNil", 0);
break;
case VM_OP_GET:
current += dasmPrintFixedOp(out, current, "get", 3);
case GST_OP_GET:
current += dasm_fixed_op(out, current, "get", 3);
break;
case VM_OP_SET:
current += dasmPrintFixedOp(out, current, "set", 3);
case GST_OP_SET:
current += dasm_fixed_op(out, current, "set", 3);
break;
}
fprintf(out, "\n");

6
disasm.h
View File

@ -5,13 +5,13 @@
#include <stdio.h>
/* Print disassembly for a given funciton */
void dasm(FILE * out, uint16_t * byteCode, uint32_t len);
void gst_dasm(FILE * out, uint16_t * byteCode, uint32_t len);
/* Print the disassembly for a function definition */
void dasmFuncDef(FILE * out, FuncDef * def);
void gst_dasm_funcdef(FILE * out, GstFuncDef * def);
/* Print the disassembly for a function */
void dasmFunc(FILE * out, Func * f);
void gst_dasm_function(FILE * out, GstFunction * f);
#endif // disasm_h_INCLUDED

203
ds.c
View File

@ -8,9 +8,9 @@
/****/
/* Create a new Buffer */
Buffer * BufferNew(VM * vm, uint32_t capacity) {
Buffer * buffer = VMAlloc(vm, sizeof(Buffer));
uint8_t * data = VMAlloc(vm, sizeof(uint8_t) * capacity);
GstBuffer *gst_buffer(Gst *vm, uint32_t capacity) {
GstBuffer *buffer = gst_alloc(vm, sizeof(GstBuffer));
uint8_t *data = gst_alloc(vm, sizeof(uint8_t) * capacity);
buffer->data = data;
buffer->count = 0;
buffer->capacity = capacity;
@ -19,17 +19,17 @@ Buffer * BufferNew(VM * vm, uint32_t capacity) {
}
/* Ensure that the buffer has enough internal capacity */
void BufferEnsure(VM * vm, Buffer * buffer, uint32_t capacity) {
void gst_buffer_ensure(Gst *vm, GstBuffer *buffer, uint32_t capacity) {
uint8_t * newData;
if (capacity <= buffer->capacity) return;
newData = VMAlloc(vm, capacity * sizeof(uint8_t));
newData = gst_alloc(vm, capacity * sizeof(uint8_t));
memcpy(newData, buffer->data, buffer->count * sizeof(uint8_t));
buffer->data = newData;
buffer->capacity = capacity;
}
/* Get a byte from an index in the buffer */
int32_t BufferGet(Buffer * buffer, uint32_t index) {
int gst_buffer_get(GstBuffer *buffer, uint32_t index) {
if (index < buffer->count) {
return buffer->data[index];
} else {
@ -38,29 +38,29 @@ int32_t BufferGet(Buffer * buffer, uint32_t index) {
}
/* Push a byte into the buffer */
void BufferPush(VM * vm, Buffer * buffer, uint8_t c) {
void gst_buffer_push(Gst *vm, GstBuffer * buffer, uint8_t c) {
if (buffer->count >= buffer->capacity) {
BufferEnsure(vm, buffer, 2 * buffer->count);
gst_buffer_ensure(vm, buffer, 2 * buffer->count);
}
buffer->data[buffer->count++] = c;
}
/* Push multiple bytes into the buffer */
void BufferAppendData(VM * vm, Buffer * buffer, uint8_t * string, uint32_t length) {
void gst_buffer_append(Gst *vm, GstBuffer *buffer, uint8_t *string, uint32_t length) {
uint32_t newSize = buffer->count + length;
if (newSize > buffer->capacity) {
BufferEnsure(vm, buffer, 2 * newSize);
gst_buffer_ensure(vm, buffer, 2 * newSize);
}
memcpy(buffer->data + buffer->count, string, length);
buffer->count = newSize;
}
/* Convert the buffer to a string */
uint8_t * BufferToString(VM * vm, Buffer * buffer) {
uint8_t * data = VMAlloc(vm, buffer->count + 2 * sizeof(uint32_t));
uint8_t *gst_buffer_to_string(Gst *vm, GstBuffer *buffer) {
uint8_t *data = gst_alloc(vm, buffer->count + 2 * sizeof(uint32_t));
data += 2 * sizeof(uint32_t);
VStringSize(data) = buffer->count;
VStringHash(data) = 0;
gst_string_length(data) = buffer->count;
gst_string_hash(data) = 0;
memcpy(data, buffer->data, buffer->count * sizeof(uint8_t));
return data;
}
@ -70,9 +70,9 @@ uint8_t * BufferToString(VM * vm, Buffer * buffer) {
/****/
/* Creates a new array */
Array * ArrayNew(VM * vm, uint32_t capacity) {
Array * array = VMAlloc(vm, sizeof(Array));
Value * data = VMAlloc(vm, capacity * sizeof(Value));
GstArray *gst_array(Gst * vm, uint32_t capacity) {
GstArray *array = gst_alloc(vm, sizeof(GstArray));
GstValue *data = gst_alloc(vm, capacity * sizeof(GstValue));
array->data = data;
array->count = 0;
array->capacity = capacity;
@ -81,30 +81,29 @@ Array * ArrayNew(VM * vm, uint32_t capacity) {
}
/* Ensure the array has enough capacity for capacity elements */
void ArrayEnsure(VM * vm, Array * array, uint32_t capacity) {
Value * newData;
void gst_array_ensure(Gst *vm, GstArray *array, uint32_t capacity) {
GstValue *newData;
if (capacity <= array->capacity) return;
newData = VMAlloc(vm, capacity * sizeof(Value));
memcpy(newData, array->data, array->capacity * sizeof(Value));
newData = gst_alloc(vm, capacity * sizeof(GstValue));
memcpy(newData, array->data, array->capacity * sizeof(GstValue));
array->data = newData;
array->capacity = capacity;
}
/* Get a value of an array with bounds checking. */
Value ArrayGet(Array * array, uint32_t index) {
GstValue gst_array_get(GstArray *array, uint32_t index) {
if (index < array->count) {
return array->data[index];
} else {
Value v;
v.type = TYPE_NIL;
v.data.boolean = 0;
GstValue v;
v.type = GST_NIL;
return v;
}
}
/* Try to set an index in the array. Return 1 if successful, 0
* on failiure */
int ArraySet(Array * array, uint32_t index, Value x) {
int gst_array_set(GstArray *array, uint32_t index, GstValue x) {
if (index < array->count) {
array->data[index] = x;
return 1;
@ -114,33 +113,31 @@ int ArraySet(Array * array, uint32_t index, Value x) {
}
/* Add an item to the end of the array */
void ArrayPush(VM * vm, Array * array, Value x) {
void gst_array_push(Gst *vm, GstArray *array, GstValue x) {
if (array->count >= array->capacity) {
ArrayEnsure(vm, array, 2 * array->count);
gst_array_ensure(vm, array, 2 * array->count);
}
array->data[array->count++] = x;
}
/* Remove the last item from the Array and return it */
Value ArrayPop(Array * array) {
GstValue gst_array_pop(GstArray *array) {
if (array->count) {
return array->data[--array->count];
} else {
Value v;
v.type = TYPE_NIL;
v.data.boolean = 0;
GstValue v;
v.type = GST_NIL;
return v;
}
}
/* Look at the last item in the Array */
Value ArrayPeek(Array * array) {
GstValue gst_array_peek(GstArray *array) {
if (array->count) {
return array->data[array->count - 1];
} else {
Value v;
v.type = TYPE_NIL;
v.data.boolean = 0;
GstValue v;
v.type = GST_NIL;
return v;
}
}
@ -150,76 +147,76 @@ Value ArrayPeek(Array * array) {
/****/
/* Create a new dictionary */
Dictionary * DictNew(VM * vm, uint32_t capacity) {
Dictionary * dict = VMAlloc(vm, sizeof(Dictionary));
DictBucket ** buckets = VMZalloc(vm, capacity * sizeof(DictBucket *));
dict->buckets = buckets;
dict->capacity = capacity;
dict->count = 0;
dict->flags = 0;
return dict;
GstObject* gst_object(Gst *vm, uint32_t capacity) {
GstObject *o = gst_alloc(vm, sizeof(GstObject));
GstBucket **buckets = gst_zalloc(vm, capacity * sizeof(GstBucket *));
o->buckets = buckets;
o->capacity = capacity;
o->count = 0;
o->flags = 0;
return o;
}
/* Resize the dictionary table. */
static void DictReHash(VM * vm, Dictionary * dict, uint32_t size) {
DictBucket ** newBuckets = VMZalloc(vm, size * sizeof(DictBucket *));
static void gst_object_rehash(Gst *vm, GstObject *o, uint32_t size) {
GstBucket **newBuckets = gst_zalloc(vm, size * sizeof(GstBucket *));
uint32_t i, count;
for (i = 0, count = dict->capacity; i < count; ++i) {
DictBucket * bucket = dict->buckets[i];
for (i = 0, count = o->capacity; i < count; ++i) {
GstBucket *bucket = o->buckets[i];
while (bucket) {
uint32_t index;
DictBucket * next = bucket->next;
index = ValueHash(bucket->key) % size;
GstBucket *next = bucket->next;
index = gst_hash(bucket->key) % size;
bucket->next = newBuckets[index];
newBuckets[index] = bucket;
bucket = next;
}
}
dict->buckets = newBuckets;
dict->capacity = size;
o->buckets = newBuckets;
o->capacity = size;
}
/* Find the bucket that contains the given key */
static DictBucket * DictFind(Dictionary * dict, Value key) {
uint32_t index = ValueHash(key) % dict->capacity;
DictBucket * bucket = dict->buckets[index];
static GstBucket *gst_object_find(GstObject *o, GstValue key) {
uint32_t index = gst_hash(key) % o->capacity;
GstBucket *bucket = o->buckets[index];
while (bucket) {
if (ValueEqual(bucket->key, key))
if (gst_equals(bucket->key, key))
return bucket;
bucket = bucket->next;
}
return (DictBucket *)0;
return (GstBucket *)0;
}
/* Get a value out of the dictionary */
Value DictGet(Dictionary * dict, Value key) {
DictBucket * bucket = DictFind(dict, key);
GstValue gst_object_get(GstObject *o, GstValue key) {
GstBucket *bucket = gst_object_find(o, key);
if (bucket) {
return bucket->value;
} else {
Value nil;
nil.type = TYPE_NIL;
GstValue nil;
nil.type = GST_NIL;
return nil;
}
}
/* Remove an entry from the dictionary */
Value DictRemove(VM * vm, Dictionary * dict, Value key) {
DictBucket * bucket, * previous;
uint32_t index = ValueHash(key) % dict->capacity;
bucket = dict->buckets[index];
previous = (DictBucket *)0;
GstValue gst_object_remove(Gst * vm, GstObject *o, GstValue key) {
GstBucket *bucket, *previous;
uint32_t index = gst_hash(key) % o->capacity;
bucket = o->buckets[index];
previous = (GstBucket *)0;
while (bucket) {
if (ValueEqual(bucket->key, key)) {
if (gst_equals(bucket->key, key)) {
if (previous) {
previous->next = bucket->next;
} else {
dict->buckets[index] = bucket->next;
o->buckets[index] = bucket->next;
}
if (dict->count < dict->capacity / 4) {
DictReHash(vm, dict, dict->capacity / 2);
if (o->count < o->capacity / 4) {
gst_object_rehash(vm, o, o->capacity / 2);
}
--dict->count;
--o->count;
return bucket->value;
}
previous = bucket;
@ -227,74 +224,52 @@ Value DictRemove(VM * vm, Dictionary * dict, Value key) {
}
/* Return nil if we found nothing */
{
Value nil;
nil.type = TYPE_NIL;
GstValue nil;
nil.type = GST_NIL;
return nil;
}
}
/* Put a value into the dictionary. Returns 1 if successful, 0 if out of memory.
* The VM pointer is needed for memory allocation. */
void DictPut(VM * vm, Dictionary * dict, Value key, Value value) {
DictBucket * bucket, * previous;
uint32_t index = ValueHash(key) % dict->capacity;
if (key.type == TYPE_NIL) return;
void gst_object_put(Gst *vm, GstObject *o, GstValue key, GstValue value) {
GstBucket *bucket, *previous;
uint32_t index = gst_hash(key) % o->capacity;
if (key.type == GST_NIL) return;
/* Do a removal if value is nil */
if (value.type == TYPE_NIL) {
bucket = dict->buckets[index];
previous = (DictBucket *)0;
if (value.type == GST_NIL) {
bucket = o->buckets[index];
previous = (GstBucket *)0;
while (bucket) {
if (ValueEqual(bucket->key, key)) {
if (gst_equals(bucket->key, key)) {
if (previous) {
previous->next = bucket->next;
} else {
dict->buckets[index] = bucket->next;
o->buckets[index] = bucket->next;
}
if (dict->count < dict->capacity / 4) {
DictReHash(vm, dict, dict->capacity / 2);
if (o->count < o->capacity / 4) {
gst_object_rehash(vm, o, o->capacity / 2);
}
--dict->count;
--o->count;
return;
}
previous = bucket;
bucket = bucket->next;
}
} else {
bucket = DictFind(dict, key);
bucket = gst_object_find(o, key);
if (bucket) {
bucket->value = value;
} else {
if (dict->count >= 2 * dict->capacity) {
DictReHash(vm, dict, 2 * dict->capacity);
if (o->count >= 2 * o->capacity) {
gst_object_rehash(vm, o, 2 * o->capacity);
}
bucket = VMAlloc(vm, sizeof(DictBucket));
bucket->next = dict->buckets[index];
bucket = gst_alloc(vm, sizeof(GstBucket));
bucket->next = o->buckets[index];
bucket->value = value;
bucket->key = key;
dict->buckets[index] = bucket;
++dict->count;
o->buckets[index] = bucket;
++o->count;
}
}
}
/* Begin iteration through a dictionary */
void DictIterate(Dictionary * dict, DictionaryIterator * iterator) {
iterator->index = 0;
iterator->dict = dict;
iterator->bucket = dict->buckets[0];
}
/* Provides a mechanism for iterating through a table. */
int DictIterateNext(DictionaryIterator * iterator, DictBucket ** bucket) {
Dictionary * dict = iterator->dict;
for (;;) {
if (iterator->bucket) {
*bucket = iterator->bucket;
iterator->bucket = iterator->bucket->next;
return 1;
}
if (++iterator->index >= dict->capacity) break;
iterator->bucket = dict->buckets[iterator->index];
}
return 0;
}

52
ds.h
View File

@ -6,35 +6,35 @@
/*
* Data type flags
*/
#define DS_LOCKED 0x01
#define GST_DS_LOCKED 0x01
/****/
/* Buffer functions */
/****/
/* Create a new buffer */
Buffer * BufferNew(VM * vm, uint32_t capacity);
GstBuffer *gst_buffer(Gst *vm, uint32_t capacity);
/* Ensure the buffer has enough capacity */
void BufferEnsure(VM * vm, Buffer * buffer, uint32_t capacity);
void gst_buffer_ensure(Gst *vm, GstBuffer *buffer, uint32_t capacity);
/* Get a value from the buffer */
int32_t BufferGet(Buffer * buffer, uint32_t index);
int gst_buffer_get(GstBuffer *buffer, uint32_t index);
/* Push a value to the buffer */
void BufferPush(VM * vm, Buffer * buffer, uint8_t c);
void gst_buffer_push(Gst *vm, GstBuffer *buffer, uint8_t c);
/* Append a piece of memory to the buffer */
void BufferAppendData(VM * vm, Buffer * buffer, uint8_t * string, uint32_t length);
void gst_buffer_append(Gst *vm, GstBuffer *buffer, uint8_t *string, uint32_t length);
/* Convert the buffer to a string */
uint8_t * BufferToString(VM * vm, Buffer * buffer);
uint8_t *gst_buffer_to_string(Gst * vm, GstBuffer * buffer);
/* Define a push function for pushing a certain type to the buffer */
#define BufferDefine(name, type) \
static void BufferPush##name (VM * vm, Buffer * buffer, type x) { \
#define BUFFER_DEFINE(name, type) \
static void gst_buffer_push_##name(Gst * vm, GstBuffer * buffer, type x) { \
union { type t; uint8_t bytes[sizeof(type)]; } u; \
u.t = x; BufferAppendData(vm, buffer, u.bytes, sizeof(type)); \
u.t = x; gst_buffer_append(vm, buffer, u.bytes, sizeof(type)); \
}
/****/
@ -42,51 +42,45 @@ static void BufferPush##name (VM * vm, Buffer * buffer, type x) { \
/****/
/* Create a new Array */
Array * ArrayNew(VM * vm, uint32_t capacity);
GstArray *gst_array(Gst *vm, uint32_t capacity);
/* Get a value of an array with bounds checking. Returns nil if
* outside bounds. */
Value ArrayGet(Array * array, uint32_t index);
GstValue gst_array_get(GstArray *array, uint32_t index);
/* Set a value in the array. Does bounds checking but will not grow
* or shrink the array */
int ArraySet(Array * array, uint32_t index, Value x);
int gst_array_set(GstArray *array, uint32_t index, GstValue x);
/* Ensure that the internal memory hash enough space for capacity items */
void ArrayEnsure(VM * vm, Array * array, uint32_t capacity);
void gst_array_ensure(Gst *vm, GstArray *array, uint32_t capacity);
/* Set a value in an array. Will also append to the array if the index is
* greater than the current max index. */
void ArrayPush(VM * vm, Array * array, Value x);
void gst_array_push(Gst *vm, GstArray *array, GstValue x);
/* Pop the last item in the array, or return NIL if empty */
Value ArrayPop(Array * array);
GstValue gst_array_pop(GstArray *array);
/* Look at the top most item of an Array */
Value ArrayPeek(Array * array);
GstValue ArrayPeek(GstArray *array);
/****/
/* Dictionary functions */
/* Object functions */
/****/
/* Create a new dictionary */
Dictionary * DictNew(VM * vm, uint32_t capacity);
/* Create a new object */
GstObject *gst_object(Gst *vm, uint32_t capacity);
/* Get a value out of the dictionary */
Value DictGet(Dictionary * dict, Value key);
GstValue gst_object_get(GstObject *obj, GstValue key);
/* Get a Value from the dictionary, but remove it at the same
* time. */
Value DictRemove(VM * vm, Dictionary * dict, Value key);
GstValue gst_object_remove(Gst *vm, GstObject *obj, GstValue key);
/* Put a value into the dictionary. Returns 1 if successful, 0 if out of memory.
* The VM pointer is needed for memory allocation. */
void DictPut(VM * vm, Dictionary * dict, Value key, Value value);
/* Begin iteration through a dictionary */
void DictIterate(Dictionary * dict, DictionaryIterator * iterator);
/* Provides a mechanism for iterating through a table. */
int DictIterateNext(DictionaryIterator * iterator, DictBucket ** bucket);
void gst_object_put(Gst *vm, GstObject *obj, GstValue key, GstValue value);
#endif // ds_h_INCLUDED

46
main.c
View File

@ -7,24 +7,23 @@
#include "value.h"
#include "disasm.h"
void StringPut(uint8_t * string) {
void string_put(uint8_t * string) {
uint32_t i;
uint32_t len = VStringSize(string);
uint32_t len = gst_string_length(string);
for (i = 0; i < len; ++i)
fputc(string[i], stdout);
}
/* Test c function */
Value print(VM * vm) {
GstValue print(Gst *vm) {
uint32_t j, count;
Value nil;
count = VMCountArgs(vm);
GstValue nil;
count = gst_count_args(vm);
for (j = 0; j < count; ++j) {
uint8_t * string = ValueToString(vm, VMGetArg(vm, j));
StringPut(string);
string_put(gst_to_string(vm, gst_arg(vm, j)));
fputc('\n', stdout);
}
nil.type = TYPE_NIL;
nil.type = GST_NIL;
return nil;
}
@ -32,20 +31,20 @@ Value print(VM * vm) {
void debugRepl() {
char buffer[1024] = {0};
const char * reader = buffer;
Value func;
VM vm;
Parser p;
Compiler c;
GstValue func;
Gst vm;
GstParser p;
GstCompiler c;
VMInit(&vm);
gst_init(&vm);
for (;;) {
/* Reset state */
ParserInit(&p, &vm);
gst_parser(&p, &vm);
/* Get and parse input until we have a full form */
while (p.status == PARSER_PENDING) {
while (p.status == GST_PARSER_PENDING) {
/* Get some input if we are done */
if (*reader == '\0') {
printf(">> ");
@ -55,7 +54,7 @@ void debugRepl() {
p.index = 0;
reader = buffer;
}
reader += ParserParseCString(&p, reader);
reader += gst_parse_cstring(&p, reader);
}
/* Check for parsing errors */
@ -74,10 +73,10 @@ void debugRepl() {
}
/* Try to compile generated AST */
CompilerInit(&c, &vm);
CompilerAddGlobalCFunc(&c, "print", print);
func.type = TYPE_FUNCTION;
func.data.func = CompilerCompile(&c, p.value);
gst_compiler(&c, &vm);
gst_compiler_add_global_cfunction(&c, "print", print);
func.type = GST_FUNCTION;
func.data.function = gst_compiler_compile(&c, p.value);
/* Check for compilation errors */
if (c.error) {
@ -93,15 +92,14 @@ void debugRepl() {
//printf("\n");
/* Execute function */
VMLoad(&vm, func);
if (VMStart(&vm)) {
gst_load(&vm, func);
if (gst_start(&vm)) {
printf("VM error: %s\n", vm.error);
reader = buffer;
buffer[0] = 0;
continue;
} else {
uint8_t * string = ValueToString(&vm, vm.ret);
StringPut(string);
string_put(gst_to_string(&vm, vm.ret));
printf("\n");
}
}

199
parse.c
View File

@ -19,15 +19,15 @@ typedef enum ParseType {
} ParseType;
/* Contain a parse state that goes on the parse stack */
struct ParseState {
struct GstParseState {
ParseType type;
union {
struct {
uint8_t endDelimiter;
Array * array;
GstArray * array;
} form;
struct {
Buffer * buffer;
GstBuffer * buffer;
enum {
STRING_STATE_BASE,
STRING_STATE_ESCAPE,
@ -39,37 +39,37 @@ struct ParseState {
};
/* Handle error in parsing */
#define PError(p, e) ((p)->error = (e), (p)->status = PARSER_ERROR)
#define p_error(p, e) ((p)->error = (e), (p)->status = GST_PARSER_ERROR)
/* Get the top ParseState in the parse stack */
static ParseState * ParserPeek(Parser * p) {
static GstParseState *parser_peek(GstParser *p) {
if (!p->count) {
PError(p, "Parser stack underflow. (Peek)");
p_error(p, "Parser stack underflow. (Peek)");
return NULL;
}
return p->data + p->count - 1;
}
/* Remove the top state from the ParseStack */
static ParseState * ParserPop(Parser * p) {
static GstParseState *parser_pop(GstParser * p) {
if (!p->count) {
PError(p, "Parser stack underflow. (Pop)");
p_error(p, "Parser stack underflow. (Pop)");
return NULL;
}
return p->data + --p->count;
}
/* Add a new, empty ParseState to the ParseStack. */
static void ParserPush(Parser *p, ParseType type, uint8_t character) {
ParseState * top;
static void parser_push(GstParser *p, ParseType type, uint8_t character) {
GstParseState *top;
if (p->count >= p->cap) {
uint32_t newCap = 2 * p->count;
ParseState * data = VMAlloc(p->vm, newCap);
GstParseState *data = gst_alloc(p->vm, newCap);
p->data = data;
p->cap = newCap;
}
++p->count;
top = ParserPeek(p);
top = parser_peek(p);
if (!top) return;
top->type = type;
switch (type) {
@ -78,48 +78,48 @@ static void ParserPush(Parser *p, ParseType type, uint8_t character) {
case PTYPE_STRING:
top->buf.string.state = STRING_STATE_BASE;
case PTYPE_TOKEN:
top->buf.string.buffer = BufferNew(p->vm, 10);
top->buf.string.buffer = gst_buffer(p->vm, 10);
break;
case PTYPE_FORM:
top->buf.form.array = ArrayNew(p->vm, 10);
top->buf.form.array = gst_array(p->vm, 10);
if (character == '(') top->buf.form.endDelimiter = ')';
if (character == '[') {
top->buf.form.endDelimiter = ']';
ArrayPush(p->vm, top->buf.form.array, ValueLoadCString(p->vm, "array"));
gst_array_push(p->vm, top->buf.form.array, gst_load_cstring(p->vm, "array"));
}
if (character == '{') {
top->buf.form.endDelimiter = '}';
ArrayPush(p->vm, top->buf.form.array, ValueLoadCString(p->vm, "dict"));
gst_array_push(p->vm, top->buf.form.array, gst_load_cstring(p->vm, "dict"));
}
break;
}
}
/* Append a value to the top-most state in the Parser's stack. */
static void ParserTopAppend(Parser * p, Value x) {
ParseState * top = ParserPeek(p);
static void parser_append(GstParser *p, GstValue x) {
GstParseState *top = parser_peek(p);
if (!top) return;
switch (top->type) {
case PTYPE_ROOT:
p->value = x;
p->status = PARSER_FULL;
p->status = GST_PARSER_FULL;
break;
case PTYPE_FORM:
ArrayPush(p->vm, top->buf.form.array, x);
gst_array_push(p->vm, top->buf.form.array, x);
break;
default:
PError(p, "Expected container type.");
p_error(p, "Expected container type.");
break;
}
}
/* Check if a character is whitespace */
static int isWhitespace(uint8_t c) {
static int is_whitespace(uint8_t c) {
return c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\0' || c == ',';
}
/* Check if a character is a valid symbol character */
static int isSymbolChar(uint8_t c) {
static int is_symbol_char(uint8_t c) {
if (c >= 'a' && c <= 'z') return 1;
if (c >= 'A' && c <= 'Z') return 1;
if (c >= '0' && c <= ':') return 1;
@ -148,10 +148,13 @@ static double exp10(int power) {
}
}
/* Read a number from a string */
static int ParseReadNumber(const uint8_t * string, const uint8_t * end, double * ret, int forceInt) {
/* Read a number from a string. Returns if successfuly
* parsed a number from the enitre input string.
* If returned 1, output is int ret.*/
static int read_number(const uint8_t *string, const uint8_t *end, double *ret, int forceInt) {
int sign = 1, x = 0;
double accum = 0, exp = 1, place = 1;
/* Check the sign */
if (*string == '-') {
sign = -1;
++string;
@ -163,8 +166,10 @@ static int ParseReadNumber(const uint8_t * string, const uint8_t * end, double *
if (*string == '.' && !forceInt) {
place = 0.1;
} else if (!forceInt && (*string == 'e' || *string == 'E')) {
/* Read the exponent */
++string;
if (!ParseReadNumber(string, end, &exp, 1))
if (string >= end) return 0;
if (!read_number(string, end, &exp, 1))
return 0;
exp = exp10(exp);
break;
@ -187,7 +192,7 @@ static int ParseReadNumber(const uint8_t * string, const uint8_t * end, double *
}
/* Checks if a string slice is equal to a string constant */
static int checkStrConst(const char * ref, const uint8_t * start, const uint8_t * end) {
static int check_str_const(const char *ref, const uint8_t *start, const uint8_t *end) {
while (*ref && start < end) {
if (*ref != *(char *)start) return 0;
++ref;
@ -197,72 +202,72 @@ static int checkStrConst(const char * ref, const uint8_t * start, const uint8_t
}
/* Build from the token buffer */
static Value ParserBuildTokenBuffer(Parser * p, Buffer * buf) {
Value x;
Number number;
static GstValue build_token(GstParser *p, GstBuffer *buf) {
GstValue x;
GstNumber number;
uint8_t * data = buf->data;
uint8_t * back = data + buf->count;
if (ParseReadNumber(data, back, &number, 0)) {
x.type = TYPE_NUMBER;
if (read_number(data, back, &number, 0)) {
x.type = GST_NUMBER;
x.data.number = number;
} else if (checkStrConst("nil", data, back)) {
x.type = TYPE_NIL;
} else if (check_str_const("nil", data, back)) {
x.type = GST_NIL;
x.data.boolean = 0;
} else if (checkStrConst("false", data, back)) {
x.type = TYPE_BOOLEAN;
} else if (check_str_const("false", data, back)) {
x.type = GST_BOOLEAN;
x.data.boolean = 0;
} else if (checkStrConst("true", data, back)) {
x.type = TYPE_BOOLEAN;
} else if (check_str_const("true", data, back)) {
x.type = GST_BOOLEAN;
x.data.boolean = 1;
} else {
if (buf->data[0] >= '0' && buf->data[0] <= '9') {
PError(p, "Symbols cannot start with digits.");
x.type = TYPE_NIL;
p_error(p, "Symbols cannot start with digits.");
x.type = GST_NIL;
} else {
x.type = TYPE_STRING;
x.data.string = BufferToString(p->vm, buf);
x.type = GST_STRING;
x.data.string = gst_buffer_to_string(p->vm, buf);
}
}
return x;
}
/* Handle parsing a token */
static int ParserTokenState(Parser * p, uint8_t c) {
ParseState * top = ParserPeek(p);
Buffer * buf = top->buf.string.buffer;
if (isWhitespace(c) || c == ')' || c == ']' || c == '}') {
ParserPop(p);
ParserTopAppend(p, ParserBuildTokenBuffer(p, buf));
static int token_state(GstParser *p, uint8_t c) {
GstParseState *top = parser_peek(p);
GstBuffer *buf = top->buf.string.buffer;
if (is_whitespace(c) || c == ')' || c == ']' || c == '}') {
parser_pop(p);
parser_append(p, build_token(p, buf));
return !(c == ')' || c == ']' || c == '}');
} else if (isSymbolChar(c)) {
BufferPush(p->vm, buf, c);
} else if (is_symbol_char(c)) {
gst_buffer_push(p->vm, buf, c);
return 1;
} else {
PError(p, "Expected symbol character.");
p_error(p, "Expected symbol character.");
return 1;
}
}
/* Handle parsing a string literal */
static int ParserStringState(Parser * p, uint8_t c) {
ParseState * top = ParserPeek(p);
static int string_state(GstParser *p, uint8_t c) {
GstParseState *top = parser_peek(p);
switch (top->buf.string.state) {
case STRING_STATE_BASE:
if (c == '\\') {
top->buf.string.state = STRING_STATE_ESCAPE;
} else if (c == '"') {
/* Load a quote form to get the string literal */
Value x, array;
x.type = TYPE_STRING;
x.data.string = BufferToString(p->vm, top->buf.string.buffer);
array.type = TYPE_ARRAY;
array.data.array = ArrayNew(p->vm, 2);
ArrayPush(p->vm, array.data.array, ValueLoadCString(p->vm, "quote"));
ArrayPush(p->vm, array.data.array, x);
ParserPop(p);
ParserTopAppend(p, array);
GstValue x, array;
x.type = GST_STRING;
x.data.string = gst_buffer_to_string(p->vm, top->buf.string.buffer);
array.type = GST_ARRAY;
array.data.array = gst_array(p->vm, 2);
gst_array_push(p->vm, array.data.array, gst_load_cstring(p->vm, "quote"));
gst_array_push(p->vm, array.data.array, x);
parser_pop(p);
parser_append(p, array);
} else {
BufferPush(p->vm, top->buf.string.buffer, c);
gst_buffer_push(p->vm, top->buf.string.buffer, c);
}
break;
case STRING_STATE_ESCAPE:
@ -278,10 +283,10 @@ static int ParserStringState(Parser * p, uint8_t c) {
case '\'': next = '\''; break;
case 'z': next = '\0'; break;
default:
PError(p, "Unknown string escape sequence.");
p_error(p, "Unknown string escape sequence.");
return 1;
}
BufferPush(p->vm, top->buf.string.buffer, next);
gst_buffer_push(p->vm, top->buf.string.buffer, next);
top->buf.string.state = STRING_STATE_BASE;
}
break;
@ -294,60 +299,60 @@ static int ParserStringState(Parser * p, uint8_t c) {
}
/* Root state of the parser */
static int ParserRootState(Parser * p, uint8_t c) {
static int root_state(GstParser *p, uint8_t c) {
if (c == ']' || c == ')' || c == '}') {
PError(p, UNEXPECTED_CLOSING_DELIM);
p_error(p, UNEXPECTED_CLOSING_DELIM);
return 1;
}
if (c == '(' || c == '[' || c == '{') {
ParserPush(p, PTYPE_FORM, c);
parser_push(p, PTYPE_FORM, c);
return 1;
}
if (c == '"') {
ParserPush(p, PTYPE_STRING, c);
parser_push(p, PTYPE_STRING, c);
return 1;
}
if (isWhitespace(c)) return 1;
if (isSymbolChar(c)) {
ParserPush(p, PTYPE_TOKEN, c);
if (is_whitespace(c)) return 1;
if (is_symbol_char(c)) {
parser_push(p, PTYPE_TOKEN, c);
return 0;
}
PError(p, "Unexpected character.");
p_error(p, "Unexpected character.");
return 1;
}
/* Handle parsing a form */
static int ParserFormState(Parser * p, uint8_t c) {
ParseState * top = ParserPeek(p);
static int form_state(GstParser *p, uint8_t c) {
GstParseState *top = parser_peek(p);
if (c == top->buf.form.endDelimiter) {
Array * array = top->buf.form.array;
Value x;
x.type = TYPE_ARRAY;
GstArray *array = top->buf.form.array;
GstValue x;
x.type = GST_ARRAY;
x.data.array = array;
ParserPop(p);
ParserTopAppend(p, x);
parser_pop(p);
parser_append(p, x);
return 1;
}
return ParserRootState(p, c);
return root_state(p, c);
}
/* Handle a character */
static int ParserDispatchChar(Parser * p, uint8_t c) {
static int dispatch_char(GstParser *p, uint8_t c) {
int done = 0;
while (!done && p->status == PARSER_PENDING) {
ParseState * top = ParserPeek(p);
while (!done && p->status == GST_PARSER_PENDING) {
GstParseState *top = parser_peek(p);
switch (top->type) {
case PTYPE_ROOT:
done = ParserRootState(p, c);
done = root_state(p, c);
break;
case PTYPE_TOKEN:
done = ParserTokenState(p, c);
done = token_state(p, c);
break;
case PTYPE_FORM:
done = ParserFormState(p, c);
done = form_state(p, c);
break;
case PTYPE_STRING:
done = ParserStringState(p, c);
done = string_state(p, c);
break;
}
}
@ -360,25 +365,25 @@ static int ParserDispatchChar(Parser * p, uint8_t c) {
* was not read. Returns 1 if any values were read, otherwise returns 0.
* Returns the number of bytes read.
*/
int ParserParseCString(Parser * p, const char * string) {
int gst_parse_cstring(GstParser *p, const char *string) {
int bytesRead = 0;
p->status = PARSER_PENDING;
while ((p->status == PARSER_PENDING) && (string[bytesRead] != '\0')) {
ParserDispatchChar(p, string[bytesRead++]);
p->status = GST_PARSER_PENDING;
while ((p->status == GST_PARSER_PENDING) && (string[bytesRead] != '\0')) {
dispatch_char(p, string[bytesRead++]);
}
return bytesRead;
}
/* Parser initialization (memory allocation) */
void ParserInit(Parser * p, VM * vm) {
void gst_parser(GstParser *p, Gst *vm) {
p->vm = vm;
ParseState * data = VMAlloc(vm, sizeof(ParseState) * 10);
GstParseState *data = gst_alloc(vm, sizeof(GstParseState) * 10);
p->data = data;
p->count = 0;
p->cap = 10;
p->index = 0;
p->error = NULL;
p->status = PARSER_PENDING;
p->value.type = TYPE_NIL;
ParserPush(p, PTYPE_ROOT, ' ');
p->status = GST_PARSER_PENDING;
p->value.type = GST_NIL;
parser_push(p, PTYPE_ROOT, ' ');
}

10
parse.h
View File

@ -3,12 +3,10 @@
#include "datatypes.h"
#define PARSE_ERROR -1
#define PARSE_VALUE_READ 1
#define PARSE_VALUE_PENDING 0
/* Initialize a parser */
void gst_parser(GstParser *p, Gst *vm);
void ParserInit(Parser * p, VM * vm);
int ParserParseCString(Parser * p, const char * string);
/* Parse a c style string. Returns true if successful */
int gst_parse_cstring(GstParser *p, const char *string);
#endif /* end of include guard: PARSE_H_ONYWMADW */

251
value.c
View File

@ -5,44 +5,44 @@
#include "ds.h"
#include "vm.h"
static uint8_t * LoadCString(VM * vm, const char * string, uint32_t len) {
uint8_t * data = VMAlloc(vm, len + 2 * sizeof(uint32_t));
static uint8_t * load_cstring(Gst *vm, const char *string, uint32_t len) {
uint8_t *data = gst_alloc(vm, len + 2 * sizeof(uint32_t));
data += 2 * sizeof(uint32_t);
VStringHash(data) = 0;
VStringSize(data) = len;
gst_string_hash(data) = 0;
gst_string_length(data) = len;
memcpy(data, string, len);
return data;
}
Value ValueLoadCString(VM * vm, const char * string) {
Value ret;
ret.type = TYPE_STRING;
ret.data.string = LoadCString(vm, string, strlen(string));
GstValue gst_load_cstring(Gst *vm, const char *string) {
GstValue ret;
ret.type = GST_STRING;
ret.data.string = load_cstring(vm, string, strlen(string));
return ret;
}
static uint8_t * NumberToString(VM * vm, Number x) {
static uint8_t * number_to_string(Gst *vm, GstNumber x) {
static const uint32_t SIZE = 20;
uint8_t * data = VMAlloc(vm, SIZE + 2 * sizeof(uint32_t));
uint8_t *data = gst_alloc(vm, SIZE + 2 * sizeof(uint32_t));
data += 2 * sizeof(uint32_t);
snprintf((char *) data, SIZE, "%.17g", x);
VStringHash(data) = 0;
VStringSize(data) = strlen((char *) data);
gst_string_hash(data) = 0;
gst_string_length(data) = strlen((char *) data);
return data;
}
static const char * HEX_CHARACTERS = "0123456789abcdef";
static const char *HEX_CHARACTERS = "0123456789abcdef";
#define HEX(i) (((uint8_t *) HEX_CHARACTERS)[(i)])
/* Returns a string description for a pointer */
static uint8_t * StringDescription(VM * vm, const char * title, uint32_t titlelen, void * pointer) {
static uint8_t *string_description(Gst *vm, const char *title, uint32_t titlelen, void *pointer) {
uint32_t len = 5 + titlelen + sizeof(void *) * 2;
uint32_t i;
uint8_t * data = VMAlloc(vm, len + 2 * sizeof(uint32_t));
uint8_t * c;
uint8_t *data = gst_alloc(vm, len + 2 * sizeof(uint32_t));
uint8_t *c;
union {
uint8_t bytes[sizeof(void *)];
void * p;
void *p;
} buf;
buf.p = pointer;
data += 2 * sizeof(uint32_t);
@ -61,58 +61,57 @@ static uint8_t * StringDescription(VM * vm, const char * title, uint32_t titlele
*c++ = HEX(byte & 0xF);
}
*c++ = '>';
VStringHash(data) = 0;
VStringSize(data) = c - data;
gst_string_hash(data) = 0;
gst_string_length(data) = c - data;
return data;
}
/* Returns a string pointer or NULL if could not allocate memory. */
uint8_t * ValueToString(VM * vm, Value x) {
uint8_t *gst_to_string(Gst *vm, GstValue x) {
switch (x.type) {
case TYPE_NIL:
return LoadCString(vm, "nil", 3);
case TYPE_BOOLEAN:
case GST_NIL:
return load_cstring(vm, "nil", 3);
case GST_BOOLEAN:
if (x.data.boolean) {
return LoadCString(vm, "true", 4);
return load_cstring(vm, "true", 4);
} else {
return LoadCString(vm, "false", 5);
return load_cstring(vm, "false", 5);
}
case TYPE_NUMBER:
return NumberToString(vm, x.data.number);
case TYPE_ARRAY:
case GST_NUMBER:
return number_to_string(vm, x.data.number);
case GST_ARRAY:
{
uint32_t i;
Buffer * b = BufferNew(vm, 40);
BufferPush(vm, b, '(');
GstBuffer * b = gst_buffer(vm, 40);
gst_buffer_push(vm, b, '(');
for (i = 0; i < x.data.array->count; ++i) {
uint8_t * substr = ValueToString(vm, x.data.array->data[i]);
BufferAppendData(vm, b, substr, VStringSize(substr));
uint8_t * substr = gst_to_string(vm, x.data.array->data[i]);
gst_buffer_append(vm, b, substr, gst_string_length(substr));
if (i < x.data.array->count - 1)
BufferPush(vm, b, ' ');
gst_buffer_push(vm, b, ' ');
}
BufferPush(vm, b, ')');
return BufferToString(vm, b);
gst_buffer_push(vm, b, ')');
return gst_buffer_to_string(vm, b);
}
return StringDescription(vm, "array", 5, x.data.pointer);
case TYPE_STRING:
case GST_STRING:
return x.data.string;
case TYPE_BYTEBUFFER:
return StringDescription(vm, "buffer", 6, x.data.pointer);
case TYPE_CFUNCTION:
return StringDescription(vm, "cfunction", 9, x.data.pointer);
case TYPE_FUNCTION:
return StringDescription(vm, "function", 8, x.data.pointer);
case TYPE_DICTIONARY:
return StringDescription(vm, "dictionary", 10, x.data.pointer);
case TYPE_THREAD:
return StringDescription(vm, "thread", 6, x.data.pointer);
case GST_BYTEBUFFER:
return string_description(vm, "buffer", 6, x.data.pointer);
case GST_CFUNCTION:
return string_description(vm, "cfunction", 9, x.data.pointer);
case GST_FUNCTION:
return string_description(vm, "function", 8, x.data.pointer);
case GST_OBJECT:
return string_description(vm, "object", 6, x.data.pointer);
case GST_THREAD:
return string_description(vm, "thread", 6, x.data.pointer);
}
return NULL;
}
/* Simple hash function */
uint32_t djb2(const uint8_t * str) {
const uint8_t * end = str + VStringSize(str);
const uint8_t * end = str + gst_string_length(str);
uint32_t hash = 5381;
while (str < end)
hash = (hash << 5) + hash + *str++;
@ -120,45 +119,45 @@ uint32_t djb2(const uint8_t * str) {
}
/* Check if two values are equal. This is strict equality with no conversion. */
int ValueEqual(Value x, Value y) {
int gst_equals(GstValue x, GstValue y) {
int result = 0;
if (x.type != y.type) {
result = 0;
} else {
switch (x.type) {
case TYPE_NIL:
case GST_NIL:
result = 1;
break;
case TYPE_BOOLEAN:
case GST_BOOLEAN:
result = (x.data.boolean == y.data.boolean);
break;
case TYPE_NUMBER:
case GST_NUMBER:
result = (x.data.number == y.data.number);
break;
/* Assume that when strings are created, equal strings
* are set to the same string */
case TYPE_STRING:
case GST_STRING:
if (x.data.string == y.data.string) {
result = 1;
break;
}
if (ValueHash(x) != ValueHash(y) ||
VStringSize(x.data.string) != VStringSize(y.data.string)) {
if (gst_hash(x) != gst_hash(y) ||
gst_string_length(x.data.string) != gst_string_length(y.data.string)) {
result = 0;
break;
}
if (!strncmp((char *) x.data.string, (char *) y.data.string, VStringSize(x.data.string))) {
if (!strncmp((char *) x.data.string, (char *) y.data.string, gst_string_length(x.data.string))) {
result = 1;
break;
}
result = 0;
break;
case TYPE_ARRAY:
case TYPE_BYTEBUFFER:
case TYPE_CFUNCTION:
case TYPE_DICTIONARY:
case TYPE_FUNCTION:
case TYPE_THREAD:
case GST_ARRAY:
case GST_BYTEBUFFER:
case GST_CFUNCTION:
case GST_OBJECT:
case GST_FUNCTION:
case GST_THREAD:
/* compare pointers */
result = (x.data.array == y.data.array);
break;
@ -168,39 +167,39 @@ int ValueEqual(Value x, Value y) {
}
/* Computes a hash value for a function */
uint32_t ValueHash(Value x) {
uint32_t gst_hash(GstValue x) {
uint32_t hash = 0;
switch (x.type) {
case TYPE_NIL:
case GST_NIL:
hash = 0;
break;
case TYPE_BOOLEAN:
case GST_BOOLEAN:
hash = x.data.boolean;
break;
case TYPE_NUMBER:
case GST_NUMBER:
{
union {
uint32_t hash;
Number number;
GstNumber number;
} u;
u.number = x.data.number;
hash = u.hash;
}
break;
/* String hashes */
case TYPE_STRING:
case GST_STRING:
/* Assume 0 is not hashed. */
if (VStringHash(x.data.string))
hash = VStringHash(x.data.string);
if (gst_string_hash(x.data.string))
hash = gst_string_hash(x.data.string);
else
hash = VStringHash(x.data.string) = djb2(x.data.string);
hash = gst_string_hash(x.data.string) = djb2(x.data.string);
break;
case TYPE_ARRAY:
case TYPE_BYTEBUFFER:
case TYPE_CFUNCTION:
case TYPE_DICTIONARY:
case TYPE_FUNCTION:
case TYPE_THREAD:
case GST_ARRAY:
case GST_BYTEBUFFER:
case GST_CFUNCTION:
case GST_OBJECT:
case GST_FUNCTION:
case GST_THREAD:
/* Cast the pointer */
{
union {
@ -218,30 +217,30 @@ uint32_t ValueHash(Value x) {
/* Compares x to y. If they are equal retuns 0. If x is less, returns -1.
* If y is less, returns 1. All types are comparable
* and should have strict ordering. */
int ValueCompare(Value x, Value y) {
int gst_compare(GstValue x, GstValue y) {
if (x.type == y.type) {
switch (x.type) {
case TYPE_NIL:
case GST_NIL:
return 0;
case TYPE_BOOLEAN:
case GST_BOOLEAN:
if (x.data.boolean == y.data.boolean) {
return 0;
} else {
return x.data.boolean ? 1 : -1;
}
case TYPE_NUMBER:
case GST_NUMBER:
/* TODO: define behavior for NaN and infinties. */
if (x.data.number == y.data.number) {
return 0;
} else {
return x.data.number > y.data.number ? 1 : -1;
}
case TYPE_STRING:
case GST_STRING:
if (x.data.string == y.data.string) {
return 0;
} else {
uint32_t xlen = VStringSize(x.data.string);
uint32_t ylen = VStringSize(y.data.string);
uint32_t xlen = gst_string_length(x.data.string);
uint32_t ylen = gst_string_length(y.data.string);
uint32_t len = xlen > ylen ? ylen : xlen;
uint32_t i;
for (i = 0; i < len; ++i) {
@ -259,12 +258,12 @@ int ValueCompare(Value x, Value y) {
return xlen < ylen ? -1 : 1;
}
}
case TYPE_ARRAY:
case TYPE_BYTEBUFFER:
case TYPE_CFUNCTION:
case TYPE_FUNCTION:
case TYPE_DICTIONARY:
case TYPE_THREAD:
case GST_ARRAY:
case GST_BYTEBUFFER:
case GST_CFUNCTION:
case GST_FUNCTION:
case GST_OBJECT:
case GST_THREAD:
if (x.data.string == y.data.string) {
return 0;
} else {
@ -280,9 +279,9 @@ int ValueCompare(Value x, Value y) {
/* Allow negative indexing to get from end of array like structure */
/* This probably isn't very fast - look at Lua conversion function.
* I would like to keep this standard C for as long as possible, though. */
static int32_t ToIndex(Number raw, int64_t len) {
static int32_t to_index(GstNumber raw, int64_t len) {
int32_t toInt = raw;
if ((Number) toInt == raw) {
if ((GstNumber) toInt == raw) {
/* We were able to convert */
if (toInt < 0) {
/* Index from end */
@ -299,65 +298,65 @@ static int32_t ToIndex(Number raw, int64_t len) {
}
/* Convert a number into a byte. */
static uint8_t NumberToByte(Number raw) {
static uint8_t to_byte(GstNumber raw) {
if (raw > 255) return 255;
if (raw < 0) return 0;
return (uint8_t) raw;
}
/* Get a value out af an associated data structure. Can throw VM error. */
Value ValueGet(VM * vm, Value ds, Value key) {
GstValue gst_get(Gst *vm, GstValue ds, GstValue key) {
int32_t index;
Value ret;
GstValue ret;
switch (ds.type) {
case TYPE_ARRAY:
VMAssertType(vm, key, TYPE_NUMBER);
index = ToIndex(key.data.number, ds.data.array->count);
if (index == -1) VMError(vm, "Invalid array access");
case GST_ARRAY:
gst_assert_type(vm, key, GST_NUMBER);
index = to_index(key.data.number, ds.data.array->count);
if (index == -1) gst_error(vm, "Invalid array access");
return ds.data.array->data[index];
case TYPE_BYTEBUFFER:
VMAssertType(vm, key, TYPE_NUMBER);
index = ToIndex(key.data.number, ds.data.buffer->count);
if (index == -1) VMError(vm, "Invalid buffer access");
ret.type = TYPE_NUMBER;
case GST_BYTEBUFFER:
gst_assert_type(vm, key, GST_NUMBER);
index = to_index(key.data.number, ds.data.buffer->count);
if (index == -1) gst_error(vm, "Invalid buffer access");
ret.type = GST_NUMBER;
ret.data.number = ds.data.buffer->data[index];
break;
case TYPE_STRING:
VMAssertType(vm, key, TYPE_NUMBER);
index = ToIndex(key.data.number, VStringSize(ds.data.string));
if (index == -1) VMError(vm, "Invalid string access");
ret.type = TYPE_NUMBER;
case GST_STRING:
gst_assert_type(vm, key, GST_NUMBER);
index = to_index(key.data.number, gst_string_length(ds.data.string));
if (index == -1) gst_error(vm, "Invalid string access");
ret.type = GST_NUMBER;
ret.data.number = ds.data.string[index];
break;
case TYPE_DICTIONARY:
return DictGet(ds.data.dict, key);
case GST_OBJECT:
return gst_object_get(ds.data.object, key);
default:
VMError(vm, "Cannot get.");
gst_error(vm, "Cannot get.");
}
return ret;
}
/* Set a value in an associative data structure. Can throw VM error. */
void ValueSet(VM * vm, Value ds, Value key, Value value) {
void gst_set(Gst *vm, GstValue ds, GstValue key, GstValue value) {
int32_t index;
switch (ds.type) {
case TYPE_ARRAY:
VMAssertType(vm, key, TYPE_NUMBER);
index = ToIndex(key.data.number, ds.data.array->count);
if (index == -1) VMError(vm, "Invalid array access");
case GST_ARRAY:
gst_assert_type(vm, key, GST_NUMBER);
index = to_index(key.data.number, ds.data.array->count);
if (index == -1) gst_error(vm, "Invalid array access");
ds.data.array->data[index] = value;
break;
case TYPE_BYTEBUFFER:
VMAssertType(vm, key, TYPE_NUMBER);
VMAssertType(vm, value, TYPE_NUMBER);
index = ToIndex(key.data.number, ds.data.buffer->count);
if (index == -1) VMError(vm, "Invalid buffer access");
ds.data.buffer->data[index] = NumberToByte(value.data.number);
case GST_BYTEBUFFER:
gst_assert_type(vm, key, GST_NUMBER);
gst_assert_type(vm, value, GST_NUMBER);
index = to_index(key.data.number, ds.data.buffer->count);
if (index == -1) gst_error(vm, "Invalid buffer access");
ds.data.buffer->data[index] = to_byte(value.data.number);
break;
case TYPE_DICTIONARY:
DictPut(vm, ds.data.dict, key, value);
case GST_OBJECT:
gst_object_put(vm, ds.data.object, key, value);
break;
default:
VMError(vm, "Cannot set.");
gst_error(vm, "Cannot set.");
}
}

23
value.h
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@ -3,18 +3,27 @@
#include "datatypes.h"
int ValueCompare(Value x, Value y);
/* Compare two gst values. All gst values are comparable and strictly
* ordered by default. Return 0 if equal, -1 if x is less than y, and
* 1 and x is greater than y. */
int gst_compare(GstValue x, GstValue y);
int ValueEqual(Value x, Value y);
/* Returns if two values are equal. */
int gst_equals(GstValue x, GstValue y);
Value ValueGet(VM * vm, Value ds, Value key);
/* Get a value from an associative gst object. Can throw errors. */
GstValue gst_get(Gst *vm, GstValue ds, GstValue key);
void ValueSet(VM * vm, Value ds, Value key, Value value);
/* Set a value in an associative gst object. Can throw errors. */
void gst_set(Gst *vm, GstValue ds, GstValue key, GstValue value);
Value ValueLoadCString(VM * vm, const char * string);
/* Load a c style string into a gst value (copies data) */
GstValue gst_load_cstring(Gst *vm, const char *string);
uint8_t * ValueToString(VM * vm, Value x);
/* Convert any gst value into a string */
uint8_t *gst_to_string(Gst *vm, GstValue x);
uint32_t ValueHash(Value x);
/* Generate a hash value for a gst object */
uint32_t gst_hash(GstValue x);
#endif /* end of include guard: VALUE_H_1RJPQKFM */

642
vm.c
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File diff suppressed because it is too large Load Diff

36
vm.h
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@ -4,54 +4,54 @@
#include "datatypes.h"
/* Exit from the VM normally */
#define VMExit(vm, r) ((vm)->ret = (r), longjmp((vm)->jump, 1))
#define gst_exit(vm, r) ((vm)->ret = (r), longjmp((vm)->jump, 1))
/* Bail from the VM with an error. */
#define VMError(vm, e) ((vm)->error = (e), longjmp((vm)->jump, 2))
#define gst_error(vm, e) ((vm)->error = (e), longjmp((vm)->jump, 2))
/* Crash. Not catchable, unlike error. */
#define VMCrash(vm, e) ((vm)->error = (e), longjmp((vm)->jump, 3))
#define gst_crash(vm, e) ((vm)->error = (e), longjmp((vm)->jump, 3))
/* Error if the condition is false */
#define VMAssert(vm, cond, e) do \
{ if (!(cond)) { VMError((vm), (e)); } } while (0)
#define gst_assert(vm, cond, e) do \
{ if (!(cond)) { gst_error((vm), (e)); } } while (0)
/* Type assertion */
#define VMAssertType(vm, f, t) \
VMAssert((vm), (f).type == (t), "Expected type,")
#define gst_assert_type(vm, f, t) \
gst_assert((vm), (f).type == (t), "Expected a different type.")
/* Initialize the VM */
void VMInit(VM * vm);
void gst_init(Gst * vm);
/* Deinitialize the VM */
void VMDeinit(VM * vm);
void gst_deinit(Gst * vm);
/* Load a function to be run on the VM */
void VMLoad(VM * vm, Value func);
void gst_load(Gst * vm, GstValue func);
/* Start running the VM */
int VMStart(VM * vm);
int gst_start(Gst * vm);
/* Run garbage collection */
void VMCollect(VM * vm);
void gst_collect(Gst * vm);
/* Collect garbage if enough memory has been allocated since
* the previous collection */
void VMMaybeCollect(VM * vm);
void gst_maybe_collect(Gst * vm);
/* Allocate memory */
void * VMAlloc(VM * vm, uint32_t amount);
void * gst_alloc(Gst * vm, uint32_t amount);
/* Allocate zeroed memory */
void * VMZalloc(VM * vm, uint32_t amount);
void * gst_zalloc(Gst * vm, uint32_t amount);
/* Get an argument from the stack */
Value VMGetArg(VM * vm, uint16_t index);
GstValue gst_arg(Gst * vm, uint16_t index);
/* Put a value on the stack */
void VMSetArg(VM * vm, uint16_t index, Value x);
void gst_set_arg(Gst * vm, uint16_t index, GstValue x);
/* Get the number of arguments on the stack */
uint16_t VMCountArgs(VM * vm);
uint16_t gst_count_args(Gst * vm);
#endif /* end of include guard: VM_H_C4OZU8CQ */