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Code Issues 1 Releases Wiki Activity

Work on serialization. Move clibs into core.

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This commit is contained in:
Calvin Rose 2017-03-20 23:06:38 -04:00
parent 4c35ee0a2c
commit f6e26d9893
9 changed files with 660 additions and 406 deletions
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21
Makefile
View File

@ -7,9 +7,8 @@ CFLAGS=-std=c99 -Wall -Wextra -Wpedantic -g -I./include
PREFIX=/usr/local
GST_TARGET=client/gst
GST_CORELIB=core/libgst.a
GST_AUXLIB=clibs/libgstaux.a
GST_HEADERS=$(addprefix include/gst/,\
vm.h ds.h value.h datatypes.h gc.h util.h gst.h stl.h thread.h)
vm.h ds.h value.h datatypes.h gc.h util.h gst.h stl.h thread.h serialize.h)
all: $(GST_TARGET)
@ -17,27 +16,19 @@ all: $(GST_TARGET)
##### The core vm and runtime #####
###################################
GST_CORE_SOURCES=$(addprefix core/,\
value.c vm.c ds.c gc.c thread.c)
compile.c disasm.c parse.c stl.c\
value.c vm.c ds.c gc.c thread.c serialize.c)
GST_CORE_OBJECTS=$(patsubst %.c,%.o,$(GST_CORE_SOURCES))
$(GST_CORELIB): $(GST_CORE_OBJECTS) $(GST_HEADERS)
ar rcs $(GST_CORELIB) $(GST_CORE_OBJECTS)
#################################
##### The auxiliary library #####
#################################
GST_AUX_SOURCES=$(addprefix clibs/,\
compile.c disasm.c parse.c stl.c)
GST_AUX_OBJECTS=$(patsubst %.c,%.o,$(GST_AUX_SOURCES))
$(GST_AUXLIB): $(GST_AUX_OBJECTS) $(GST_HEADERS)
ar rcs $(GST_AUXLIB) $(GST_AUX_OBJECTS)
##############################
##### The example client #####
##############################
GST_CLIENT_SOURCES=client/main.c
GST_CLIENT_OBJECTS=$(patsubst %.c,%.o,$(GST_CLIENT_SOURCES))
$(GST_TARGET): $(GST_CLIENT_OBJECTS) $(GST_HEADERS) $(GST_AUXLIB) $(GST_CORELIB)
$(CC) $(CFLAGS) -o $(GST_TARGET) $(GST_CLIENT_OBJECTS) $(GST_CORELIB) $(GST_AUXLIB)
$(GST_TARGET): $(GST_CLIENT_OBJECTS) $(GST_HEADERS) $(GST_CORELIB)
$(CC) $(CFLAGS) -o $(GST_TARGET) $(GST_CLIENT_OBJECTS) $(GST_CORELIB)
# Compile all .c to .o
%.o : %.c $(GST_HEADERS)
@ -55,9 +46,7 @@ valgrind: $(GST_TARGET)
clean:
rm $(GST_TARGET) || true
rm $(GST_CORELIB) || true
rm $(GST_AUXLIB) || true
rm $(GST_CORE_OBJECTS) || true
rm $(GST_AUX_OBJECTS) || true
rm $(GST_CLIENT_OBJECTS) || true
.PHONY: clean install run debug valgrind

21
clibs/compile.c → core/compile.c
View File

@ -597,6 +597,7 @@ MAKE_SPECIAL(gte, 1, 1, GST_OP_LTE, -1, OP_0_BOOLEAN | OP_1_BOOLEAN | OP_REVERSE
MAKE_SPECIAL(not, -1, GST_OP_NOT, -1, -1, 0)
MAKE_SPECIAL(get, -1, -1, GST_OP_GET, -1, 0)
MAKE_SPECIAL(make_tuple, -1, -1, -1, GST_OP_TUP, 0)
MAKE_SPECIAL(length, -1, GST_OP_LEN, -1, -1, 0)
#undef MAKE_SPECIAL
@ -1030,6 +1031,7 @@ static SpecialFormHelper get_special(GstValue *form) {
case '>': return compile_gt;
case '<': return compile_lt;
case '=': return compile_equals;
case ':': return compile_var;
default:
break;
}
@ -1094,6 +1096,17 @@ static SpecialFormHelper get_special(GstValue *form) {
}
}
break;
case 'l':
{
if (gst_string_length(name) == 6 &&
name[1] == 'e' &&
name[2] == 'n' &&
name[3] == 'g' &&
name[4] == 't' &&
name[5] == 'h') {
return compile_length;
}
}
case 'n':
{
if (gst_string_length(name) == 3 &&
@ -1148,14 +1161,6 @@ static SpecialFormHelper get_special(GstValue *form) {
}
}
break;
case ':':
{
if (gst_string_length(name) == 2 &&
name[1] == '=') {
return compile_var;
}
}
break;
default:
break;
}

382
core/deserialize.c
View File

@ -1,382 +0,0 @@
#include <gst/datatypes.h>
#include <gst/vm.h>
#include <gst/values.h>
#include <gst/ds.h>
#include <gst/util.h>
/**
* Data format
* State is encoded as a string of unsigned bytes.
*
* Types:
*
* Byte 0 to 200: small integer byte - 100
* Byte 201: Nil
* Byte 202: True
* Byte 203: False
* Byte 204: Number - double format
* Byte 205: String - [u32 length]*[u8... characters]
* Byte 206: Symbol - [u32 length]*[u8... characters]
* Byte 207: Buffer - [u32 length]*[u8... characters]
* Byte 208: Array - [u32 length]*[value... elements]
* Byte 209: Tuple - [u32 length]*[value... elements]
* Byte 210: Thread - [u8 state][u32 frames]*[[value callee][value env]
* [u32 pcoffset][u32 erroffset][u16 ret][u16 errloc][u16 size]*[value ...stack]
* Byte 211: Object - [value meta][u32 length]*2*[value... kvs]
* Byte 212: FuncDef - [u32 locals][u32 arity][u32 flags][u32 literallen]*[value...
* literals][u32 bytecodelen]*[u16... bytecode]
* Byte 213: FunEnv - [value thread][u32 length]*[value ...upvalues]
* (upvalues is not read if thread is a thread object)
* Byte 214: Func - [value parent][value def][value env]
* (nil values indicate empty)
* Byte 215: LUdata - [value meta][u32 length]*[u8... bytes]
* Byte 216: CFunc - [u32 length]*[u8... idstring]
* Byte 217: Ref - [u32 id]
*/
/* Error at buffer end */
static const char UEB[] = "unexpected end of buffer";
/* Read 4 bytes as an unsigned integer */
static uint32_t bytes2u32(uint8_t bytes[4]) {
union {
uint8_t bytes[4];
uint32_t u32;
} u;
u.bytes = bytes;
return u.u32;
}
/* Read 2 bytes as unsigned short */
static uint16_t bytes2u16(uint8_t bytes[2]) {
union {
uint8_t bytes[2];
uint16_t u16;
} u;
u.bytes = bytes;
return u.u16;
}
/* Read 8 bytes as a double */
static uint32_t bytes2dbl(uint8_t bytes[8]) {
union {
uint8_t bytes[8];
double dbl;
} u;
u.bytes = bytes;
return u.dbl;
}
/* Read a string and turn it into a gst value */
static GstValue gst_deserialize_impl(
Gst *vm,
uint8_t *data,
uint8_t *end,
uint8_t **newData,
GstArray *visited) {
GstValue ret;
ret.type = GST_NIL;
GstValue *buffer;
uint32_t length, i;
/* Handle errors as needed */
#define deser_error(e) (exit(-1), NULL)
/* Assertions */
#define deser_assert(c, e) do{if(!(c))deser_error(e);}while(0)
/* Assert enough buffer */
#define deser_datacheck(len) (end - data < (len) ? deser_error(UEB) : data)
/* Check for enough space to read uint32_t */
#define read_u32() (deser_datacheck(4), bytes2u32(data))
/* Check for enough space to read uint16_t */
#define read_u16() (deser_datacheck(2), bytes2u16(data))
/* Check for enough space to read uint32_t */
#define read_dbl() (deser_datacheck(8), bytes2dbl(data))
/* Check enough buffer left to read one byte */
if (data >= end) deser_error(UEB);
/* Small integer */
if (*data < 201) {
ret.type = GST_NUMBER;
ret.data.number = *data - 100;
newData = data + 1;
return ret;
}
/* Main switch for types */
switch (*data++) {
case 201: /* Nil */
ret.type = GST_NIL;
*newData = data;
return ret;
case 202: /* True */
ret.type = GST_BOOLEAN;
ret.data.boolean = 1;
*newData = data;
return ret;
case 203: /* False */
ret.type = GST_BOOLEAN;
ret.data.boolean = 0;
*newData = data;
return ret;
case 204: /* Long number (double) */
ret.type = GST_NUMBER;
ret.data.number = read_dbl();
*newData = data + 8;
return ret;
case 205: /* String */
case 206: /* Symbol */
ret.type = data[-1] == 205 ? GST_STRING : GST_SYMBOL;
length = read_u32(); data += 4;
data = deser_datacheck(length);
ret.data.string =
gst_alloc(vm, 2 * sizeof(uint32_t) + length + 1) + 2 * sizeof(uint32_t);
gst_string_length(ret.data.string) = length;
gst_string_hash(ret.data.string) = 0;
gst_memcpy(ret.data.string, data, length);
ret.data.string[length] = 0;
*newData = data + length;
gst_array_push(vm, visited, ret);
return ret;
case 207: /* Buffer */
ret.type = GST_BUFFER;
length = read_u32(); data += 4;
data = deser_datacheck(length);
ret.data.buffer = gst_alloc(vm, sizeof(GstBuffer));
ret.data.buffer->data = gst_alloc(vm, length);
gst_memcpy(ret.data.string, data, length;
ret.data.buffer->count = length;
ret.data.buffer->capacity = length;
*newData = data + length;
gst_array_push(vm, visited, ret);
return ret;
case 208: /* Array */
ret.type = GST_ARRAY;
length = read_u32(); data += 4;
buffer = gst_alloc(vm, length * sizeof(GstValue));
for (i = 0; i < length; ++i)
buffer[i] = gst_deserialize_impl(vm, data, end, &data, visited);
ret.data.array = gst_alloc(vm, sizeof(GstArray));
ret.data.array->data = buffer;
ret.data.array->count = length;
ret.data.array->capacity = length;
*newData = data;
gst_array_push(vm, visited, ret);
return ret;
case 209: /* Tuple */
ret.type = GST_TUPLE;
length = read_u32(); data += 4;
buffer = gst_alloc(vm, length * sizeof(GstValue) + 2 * sizeof(uint32_t))
+ 2 * sizeof(uint32_t);
for (i = 0; i < length; ++i)
buffer[i] = gst_deserialize_impl(vm, data, end, &data, visited);
gst_tuple_hash(buffer) = 0;
gst_tuple_length(buffer) = length;
ret.data.tuple = buffer;
*newData = data;
gst_array_push(vm, visited, ret);
return ret;
case 210: /* Thread */
{
GstValue nil;
GstThread *t;
GstValue *stack;
uint16_t prevsize = 0;
uint8 statusbyte;
nil.type = GST_NIL;
t = gst_thread(vm, 64, nil);
ret.type = GST_THREAD;
ret.data.thread = t;
deser_assert(data < end, UEB);
statusbyte = *data++;
length = read_u32(); data += 4;
/* Check for empty thread */
if (length == 0) {
*newData = data;
return ret;
}
/* Set status */
if (statusbyte == 0) t->status = GST_THREAD_PENDING;
else if (statusbyte == 1) t->status = GST_THREAD_ALIVE;
else t->status = GST_THREAD_DEAD;
/* Add frames */
for (i = 0; i < length; ++i) {
GstValue callee, env;
uint32_t pcoffset, erroffset;
uint16_t ret, errloc, size, j;
/* Create a new frame */
if (i > 0)
gst_thread_beginframe(vm, t, nil, 0);
/* Read the stack */
callee = gst_deserialize_impl(vm, data, end, &data, visited);
env = gst_deserialize_impl(vm, data, end, &data, visited);
pcoffset = read_u32(); data += 4;
erroffset = read_u32(); data += 4;
ret = read_u16(); data += 2;
errloc = read_u16(); data += 2;
size = read_u16(); data += 2;
/* Set up the stack */
stack = gst_thread_stack(t);
if (callee.type = GST_FUNCTION) {
gst_frame_pc(stack) = callee.data.function->def->byteCode + pcoffset;
gst_frame_errjmp(stack) = callee.data.function->def->byteCode + erroffset;
if (env.type == GST_FUNCENV)
gst_frame_env(stack) = env.data.env;
}
gst_frame_ret(stack) = ret;
gst_frame_errloc(stack) = errloc;
gst_frame_size(stack) = size;
gst_frame_prevsize(stack) = prevsize;
prevsize = size;
/* Push stack args */
for (j = 0; j < size; ++j) {
GstValue temp = gst_deserialize_impl(vm, data, end, &data, visited);
gst_thread_push(vm, t, temp);
}
}
*newData = data;
}
return ret;
case 211: /* Object */
{
GstValue meta;
ret.type = GST_OBJECT;
ret.data.object = gst_object(vm, 10);
meta = gst_deserialize_impl(vm, data, end, &data, visited);
length = read_u32(); data += 4;
for (i = 0; i < length; i += 2) {
GstValue key, value;
key = gst_deserialize_impl(vm, data, end, &data, visited);
value = gst_deserialize_impl(vm, data, end, &data, visited);
gst_object_put(vm, ret.data.object, key, value);
}
if (meta.type == GST_OBJECT) {
ret.data.object->meta = meta.data.object;
}
*newData = data;
gst_array_push(vm, visited, ret);
}
return ret;
case 212: /* Funcdef */
{
GstFuncDef *def;
uint32_t locals, arity, literalsLen, byteCodeLen, flags;
locals = read_u32(); data += 4;
arity = read_u32(); data += 4;
flags = read_u32(); data += 4;
literalsLen = read_u32(); data += 4;
def = gst_alloc(vm, sizeof(GstFuncDef));
ret.type = GST_FUNCDEF;
ret.data.def = def;
def->locals = locals;
def->arity = arity;
def->flags = flags;
def->literalsLen = literalsLen;
if (literalsLen > 0) {
def->literals = gst_alloc(vm, literalsLen * sizeof(GstValue));
}
for (i = 0; i < literalsLen; ++i) {
def->literals[i] = gst_deserialize_impl(vm, data, end, &data, visited);
}
byteCodeLen = read_u32(); data += 4;
deser_datacheck(byteCodeLen);
def->byteCode = vm_alloc(vm, byteCodeLen * sizeof(uint16_t));
def->byteCodeLen = byteCodeLen;
for (i = 0; i < byteCodeLen; ++i) {
def->byteCode[i] = read_u16();
data += 2;
}
*newData = data;
gst_array_push(vm, visited, ret);
}
return ret;
case 213: /* Funcenv */
{
GstValue thread = gst_deserialize_impl(vm, deata, &data, visited);
length = read_u32(); data += 4;
ret.type = GST_FUNCENV;
ret.data.env = gst_alloc(vm, sizeof(GstFuncEnv));
ret.data.env->stackOffset = length;
if (thread.type == GST_THREAD) {
ret.data.env->thread = thread.data.thread;
} else {
ret.data.env->thread = NULL;
ret.data.env->values = vm_alloc(vm, sizeof(GstValue) * length);
for (i = 0; i < length; ++i) {
GstValue item = gst_deserialize_impl(vm, data, end, &data, visited);
ret.data.env->values[i] = item;
}
}
*newData = data;
gst_array_push(vm, visited, ret);
}
return ret;
case 214: /* Function */
{
GstValue parent, def, env;
parent = gst_deserialize_impl(vm, data, end, &data, visited);
def = gst_deserialize_impl(vm, data, end, &data, visited);
env = gst_deserialize_impl(vm, data, end, &data, visited);
ret.type = GST_FUNCTION;
ret.data.function = gst_alloc(vm, sizeof(GstFunction));
if (parent->type == GST_NIL) {
ret.data.function->parent = NULL;
} else if (parent->type == GST_FUNCTION) {
ret.data.function->parent = parent.data.function;
} else {
deser_error("expected function");
}
gst_assert(def->type == GST_FUNCDEF, "expected funcdef");
gst_assert(env->type == GST_FUNCENV, "expected funcenv");
ret.data.function->env = env.data.env;
ret.data.function->def = env.data.def;
*newData = data;
gst_array_push(vm, visited, ret);
}
return ret;
case 215: /* LUdata */
{
GstValue meta;
ret.type = GST_USERDATA;
meta = gst_deserialize_impl(vm, data, end, &data, visited);
deser_assert(meta.type == GST_OBJECT, "userdata requires valid meta");
length = read_u32(); data += 4;
data = deser_datacheck(length);
ret.data.pointer = gst_userdata(vm, length, meta.data.object);
gst_memcpy(ret.data.pointer, data, length);
*newData = data + length;
gst_array_push(vm, visited, ret);
}
return ret;
case 216: /* C function */
return ret;
case 217: /* Reference */
length = read_u32(); data += 4;
deser_assert(visited->count > length, "invalid reference");
*newData = data;
return visited->data[length];
}
}

0
clibs/disasm.c → core/disasm.c
View File

0
clibs/parse.c → core/parse.c
View File

535
core/serialize.c Normal file
View File

@ -0,0 +1,535 @@
#include <gst/serialize.h>
#include <gst/datatypes.h>
#include <gst/vm.h>
#include <gst/value.h>
#include <gst/ds.h>
#include <gst/util.h>
#include <gst/thread.h>
/**
* Data format
* State is encoded as a string of unsigned bytes.
*
* Types:
*
* Byte 0 to 200: small integer byte - 100
* Byte 201: Nil
* Byte 202: True
* Byte 203: False
* Byte 204: Number - double format
* Byte 205: String - [u32 length]*[u8... characters]
* Byte 206: Symbol - [u32 length]*[u8... characters]
* Byte 207: Buffer - [u32 length]*[u8... characters]
* Byte 208: Array - [u32 length]*[value... elements]
* Byte 209: Tuple - [u32 length]*[value... elements]
* Byte 210: Thread - [u8 state][u32 frames]*[[value callee][value env]
* [u32 pcoffset][u32 erroffset][u16 ret][u16 errloc][u16 size]*[value ...stack]
* Byte 211: Object - [value meta][u32 length]*2*[value... kvs]
* Byte 212: FuncDef - [u32 locals][u32 arity][u32 flags][u32 literallen]*[value...
* literals][u32 bytecodelen]*[u16... bytecode]
* Byte 213: FunEnv - [value thread][u32 length]*[value ...upvalues]
* (upvalues is not read if thread is a thread object)
* Byte 214: Func - [value parent][value def][value env]
* (nil values indicate empty)
* Byte 215: LUdata - [value meta][u32 length]*[u8... bytes]
* Byte 216: CFunc - [u32 length]*[u8... idstring]
* Byte 217: Ref - [u32 id]
*/
/* Error at buffer end */
static const char UEB[] = "unexpected end of buffer";
/* Read 4 bytes as an unsigned integer */
static uint32_t bytes2u32(uint8_t *bytes) {
union {
uint8_t bytes[4];
uint32_t u32;
} u;
gst_memcpy(u.bytes, bytes, 4 * sizeof(uint8_t));
return u.u32;
}
/* Read 2 bytes as unsigned short */
static uint16_t bytes2u16(uint8_t *bytes) {
union {
uint8_t bytes[2];
uint16_t u16;
} u;
gst_memcpy(u.bytes, bytes, 2 * sizeof(uint8_t));
return u.u16;
}
/* Read 8 bytes as a double */
static uint32_t bytes2dbl(uint8_t *bytes) {
union {
uint8_t bytes[8];
double dbl;
} u;
gst_memcpy(u.bytes, bytes, 8 * sizeof(uint8_t));
return u.dbl;
}
/* Read a string and turn it into a gst value. Returns
* an error message if there is an error message during
* deserialization. If successful, the resulting value is
* passed by reference. */
static const char *gst_deserialize_impl(
Gst *vm,
uint8_t *data,
uint8_t *end,
uint8_t **newData,
GstArray *visited,
GstValue *out) {
GstValue ret;
ret.type = GST_NIL;
GstValue *buffer;
uint8_t *bytebuf;
uint32_t length, i;
const char *err;
/* Handle errors as needed */
#define deser_error(e) return (e)
/* Assertions */
#define deser_assert(c, e) do{if(!(c))deser_error(e);}while(0)
/* Assert enough buffer */
#define deser_datacheck(len) do{if (end - data < (len)) deser_error(UEB);}while(0)
/* Check for enough space to read uint32_t */
#define read_u32(out) do{deser_datacheck(4); (out)=bytes2u32(data); data += 4; }while(0)
#define read_u16(out) do{deser_datacheck(2); (out)=bytes2u16(data); data += 2; }while(0)
#define read_dbl(out) do{deser_datacheck(8); (out)=bytes2dbl(data); data += 8; }while(0)
/* Check enough buffer left to read one byte */
if (data >= end) deser_error(UEB);
/* Small integer */
if (*data < 201) {
ret.type = GST_NUMBER;
ret.data.number = *data - 100;
*newData = data + 1;
*out = ret;
return NULL;
}
/* Main switch for types */
switch (*data++) {
case 201: /* Nil */
ret.type = GST_NIL;
break;
case 202: /* True */
ret.type = GST_BOOLEAN;
ret.data.boolean = 1;
break;
case 203: /* False */
ret.type = GST_BOOLEAN;
ret.data.boolean = 0;
break;
case 204: /* Long number (double) */
ret.type = GST_NUMBER;
read_dbl(ret.data.number);
break;
case 205: /* String */
case 206: /* Symbol */
ret.type = data[-1] == 205 ? GST_STRING : GST_SYMBOL;
read_u32(length);
deser_datacheck(length);
ret.data.string = gst_alloc(vm, 2 * sizeof(uint32_t) + length + 1);
ret.data.string += 2 * sizeof(uint32_t);
gst_string_length(ret.data.string) = length;
gst_string_hash(ret.data.string) = 0;
gst_memcpy(ret.data.string, data, length);
ret.data.string[length] = 0;
data += length;
gst_array_push(vm, visited, ret);
break;
case 207: /* Buffer */
ret.type = GST_BYTEBUFFER;
read_u32(length);
deser_datacheck(length);
ret.data.buffer = gst_alloc(vm, sizeof(GstBuffer));
ret.data.buffer->data = gst_alloc(vm, length);
gst_memcpy(ret.data.string, data, length);
ret.data.buffer->count = length;
ret.data.buffer->capacity = length;
data += length;
gst_array_push(vm, visited, ret);
break;
case 208: /* Array */
ret.type = GST_ARRAY;
read_u32(length);
buffer = gst_alloc(vm, length * sizeof(GstValue));
for (i = 0; i < length; ++i)
if ((err = gst_deserialize_impl(vm, data, end, &data, visited, buffer + i)))
return err;
ret.data.array = gst_alloc(vm, sizeof(GstArray));
ret.data.array->data = buffer;
ret.data.array->count = length;
ret.data.array->capacity = length;
gst_array_push(vm, visited, ret);
break;
case 209: /* Tuple */
ret.type = GST_TUPLE;
read_u32(length);
bytebuf = gst_alloc(vm, length * sizeof(GstValue) + 2 * sizeof(uint32_t));
buffer = (GstValue *)(bytebuf + 2 * sizeof(uint32_t));
for (i = 0; i < length; ++i)
if ((err = gst_deserialize_impl(vm, data, end, &data, visited, buffer + i)))
return err;
gst_tuple_hash(buffer) = 0;
gst_tuple_length(buffer) = length;
ret.data.tuple = buffer;
gst_array_push(vm, visited, ret);
break;
case 210: /* Thread */
{
GstValue nil;
GstThread *t;
GstValue *stack;
uint16_t prevsize = 0;
uint8_t statusbyte;
nil.type = GST_NIL;
t = gst_thread(vm, nil, 64);
ret.type = GST_THREAD;
ret.data.thread = t;
deser_assert(data < end, UEB);
statusbyte = *data++;
read_u32(length);
/* Check for empty thread - TODO check for valid state */
if (length == 0)
break;
/* Set status */
if (statusbyte == 0) t->status = GST_THREAD_PENDING;
else if (statusbyte == 1) t->status = GST_THREAD_ALIVE;
else t->status = GST_THREAD_DEAD;
/* Add frames */
for (i = 0; i < length; ++i) {
GstValue callee, env;
uint32_t pcoffset, erroffset;
uint16_t ret, errloc, size, j;
/* Create a new frame */
if (i > 0)
gst_thread_beginframe(vm, t, nil, 0);
/* Read the stack */
err = gst_deserialize_impl(vm, data, end, &data, visited, &callee);
if (err != NULL) return err;
err = gst_deserialize_impl(vm, data, end, &data, visited, &env);
if (err != NULL) return err;
read_u32(pcoffset);
read_u32(erroffset);
read_u16(ret);
read_u16(errloc);
read_u16(size);
/* Set up the stack */
stack = gst_thread_stack(t);
if (callee.type == GST_FUNCTION) {
gst_frame_pc(stack) = callee.data.function->def->byteCode + pcoffset;
gst_frame_errjmp(stack) = callee.data.function->def->byteCode + erroffset;
if (env.type == GST_FUNCENV)
gst_frame_env(stack) = env.data.env;
}
gst_frame_ret(stack) = ret;
gst_frame_errloc(stack) = errloc;
gst_frame_size(stack) = size;
gst_frame_prevsize(stack) = prevsize;
prevsize = size;
/* Push stack args */
for (j = 0; j < size; ++j) {
GstValue temp;
err = gst_deserialize_impl(vm, data, end, &data, visited, &temp);
gst_thread_push(vm, t, temp);
}
}
}
break;
case 211: /* Object */
{
GstValue meta;
ret.type = GST_OBJECT;
ret.data.object = gst_object(vm, 10);
err = gst_deserialize_impl(vm, data, end, &data, visited, &meta);
if (err != NULL) return err;
read_u32(length);
for (i = 0; i < length; i += 2) {
GstValue key, value;
err = gst_deserialize_impl(vm, data, end, &data, visited, &key);
if (err != NULL) return err;
err = gst_deserialize_impl(vm, data, end, &data, visited, &value);
if (err != NULL) return err;
gst_object_put(vm, ret.data.object, key, value);
}
if (meta.type == GST_OBJECT)
ret.data.object->meta = meta.data.object;
gst_array_push(vm, visited, ret);
}
break;
case 212: /* Funcdef */
{
GstFuncDef *def;
uint32_t locals, arity, literalsLen, byteCodeLen, flags;
read_u32(locals);
read_u32(arity);
read_u32(flags);
read_u32(literalsLen);
def = gst_alloc(vm, sizeof(GstFuncDef));
ret.type = GST_FUNCDEF;
ret.data.def = def;
def->locals = locals;
def->arity = arity;
def->flags = flags;
def->literalsLen = literalsLen;
if (literalsLen > 0) {
def->literals = gst_alloc(vm, literalsLen * sizeof(GstValue));
}
for (i = 0; i < literalsLen; ++i) {
err = gst_deserialize_impl(vm, data, end, &data, visited, def->literals + i);
if (err != NULL) return err;
}
read_u32(byteCodeLen);
deser_datacheck(byteCodeLen);
def->byteCode = gst_alloc(vm, byteCodeLen * sizeof(uint16_t));
def->byteCodeLen = byteCodeLen;
for (i = 0; i < byteCodeLen; ++i) {
read_u16(def->byteCode[i]);
}
gst_array_push(vm, visited, ret);
}
break;
case 213: /* Funcenv */
{
GstValue thread;
err = gst_deserialize_impl(vm, data, end, &data, visited, &thread);
if (err != NULL) return err;
read_u32(length);
ret.type = GST_FUNCENV;
ret.data.env = gst_alloc(vm, sizeof(GstFuncEnv));
ret.data.env->stackOffset = length;
if (thread.type == GST_THREAD) {
ret.data.env->thread = thread.data.thread;
} else {
ret.data.env->thread = NULL;
ret.data.env->values = gst_alloc(vm, sizeof(GstValue) * length);
for (i = 0; i < length; ++i) {
GstValue item;
err = gst_deserialize_impl(vm, data, end, &data, visited, &item);
if (err != NULL) return err;
ret.data.env->values[i] = item;
}
}
gst_array_push(vm, visited, ret);
}
break;
case 214: /* Function */
{
GstValue parent, def, env;
err = gst_deserialize_impl(vm, data, end, &data, visited, &parent);
if (err != NULL) return err;
err = gst_deserialize_impl(vm, data, end, &data, visited, &def);
if (err != NULL) return err;
err = gst_deserialize_impl(vm, data, end, &data, visited, &env);
if (err != NULL) return err;
ret.type = GST_FUNCTION;
ret.data.function = gst_alloc(vm, sizeof(GstFunction));
if (parent.type == GST_NIL) {
ret.data.function->parent = NULL;
} else if (parent.type == GST_FUNCTION) {
ret.data.function->parent = parent.data.function;
} else {
deser_error("expected function");
}
deser_assert(def.type == GST_FUNCDEF, "expected funcdef");
deser_assert(env.type == GST_FUNCENV, "expected funcenv");
ret.data.function->env = env.data.env;
ret.data.function->def = env.data.def;
gst_array_push(vm, visited, ret);
}
break;
case 215: /* LUdata */
{
GstValue meta;
ret.type = GST_USERDATA;
err = gst_deserialize_impl(vm, data, end, &data, visited, &meta);
if (err != NULL) return err;
deser_assert(meta.type == GST_OBJECT, "userdata requires valid meta");
read_u32(length);
deser_datacheck(length);
ret.data.pointer = gst_userdata(vm, length, meta.data.object);
gst_memcpy(ret.data.pointer, data, length);
gst_array_push(vm, visited, ret);
}
break;
case 216: /* C function */
/* TODO - add registry for c functions */
read_u32(length);
ret.type = GST_NIL;
break;
case 217: /* Reference */
read_u32(length);
deser_assert(visited->count > length, "invalid reference");
ret = visited->data[length];
break;
}
/* Handle a successful return */
*out = ret;
*newData = data;
return NULL;
}
/* Load a value from data */
const char *gst_deserialize(
Gst *vm,
uint8_t *data,
uint32_t len,
GstValue *out,
uint8_t *nextData) {
GstValue ret;
const char *err;
GstArray *visited = gst_array(vm, 10);
err = gst_deserialize_impl(vm, data, data + len, &nextData, visited, &ret);
if (err != NULL) return err;
*out = ret;
return NULL;
}
/* Allow appending other types to buffers */
BUFFER_DEFINE(number, GstNumber)
/*BUFFER_DEFINE(u16, uint16_t)*/
BUFFER_DEFINE(u32, uint32_t)
/* Serialize a value and write to a buffer. Returns possible
* error messages. */
const char *gst_serialize_impl(
Gst *vm,
GstBuffer *buffer,
GstObject *visited,
uint32_t *nextId,
GstValue x) {
uint32_t i, count;
const char *err;
GstValue check;
#define write_byte(b) gst_buffer_push(vm, buffer, (b))
#define write_u32(b) gst_buffer_push_u32(vm, buffer, (b))
#define write_u16(b) gst_buffer_push_u16(vm, buffer, (b))
#define write_dbl(b) gst_buffer_push_number(vm, buffer, (b))
/* Check non reference types - if successful, return NULL */
switch (x.type) {
case GST_NIL:
write_byte(201);
return NULL;
case GST_BOOLEAN:
write_byte(x.data.boolean ? 202 : 203);
return NULL;
case GST_NUMBER:
{
GstNumber number = x.data.number;
int32_t int32Num = (int32_t) number;
if (number == (GstNumber) int32Num &&
int32Num <= 100 && int32Num >= -100) {
write_byte(int32Num + 100);
} else {
write_byte(204);
write_dbl(number);
}
}
return NULL;
case GST_CFUNCTION:
/* TODO */
break;
default:
break;
}
/* Check if already seen - if so, use reference */
check = gst_object_get(visited, x);
if (check.type == GST_NUMBER) {
write_byte(217);
write_u32((uint32_t) check.data.number);
return NULL;
}
/* Check reference types */
switch (x.type) {
default:
return "unable to serialize type";
case GST_STRING:
case GST_SYMBOL:
write_byte(x.type == GST_STRING ? 205 : 206);
count = gst_string_length(x.data.string);
write_u32(count);
for (i = 0; i < count; ++i) {
write_byte(x.data.string[i]);
}
break;
case GST_BYTEBUFFER:
write_byte(207);
count = x.data.buffer->count;
write_u32(count);
for (i = 0; i < count; ++i) {
write_byte(x.data.buffer->data[i]);
}
break;
case GST_ARRAY:
write_byte(208);
count = x.data.array->count;
write_u32(count);
for (i = 0; i < count; ++i) {
err = gst_serialize_impl(vm, buffer, visited, nextId, x.data.array->data[i]);
if (err != NULL) return err;
}
break;
case GST_TUPLE:
write_byte(209);
count = gst_tuple_length(x.data.tuple);
write_u32(count);
for (i = 0; i < count; ++i) {
err = gst_serialize_impl(vm, buffer, visited, nextId, x.data.tuple[i]);
if (err != NULL) return err;
}
break;
/*case GST_THREAD:*/
/*break;*/
}
/* Record reference */
check.type = GST_NUMBER;
check.data.number = *nextId++;
gst_object_put(vm, visited, x, check);
/* Return success */
return NULL;
}
/* Serialize an object */
const char *gst_serialize(Gst *vm, GstBuffer *buffer, GstValue x) {
uint32_t nextId = 0;
uint32_t oldCount = buffer->count;
const char *err;
GstObject *visited = gst_object(vm, 10);
err = gst_serialize_impl(vm, buffer, visited, &nextId, x);
if (err != NULL) {
buffer->count = oldCount;
}
return err;
}

53
clibs/stl.c → core/stl.c
View File

@ -2,6 +2,7 @@
* will eventually be ported over to gst if possible */
#include <gst/stl.h>
#include <gst/gst.h>
#include <gst/serialize.h>
/****/
/* Core */
@ -53,6 +54,29 @@ int gst_stl_callforeach(Gst *vm) {
}
}
/* Create a buffer */
int gst_stl_make_buffer(Gst *vm) {
uint32_t i, count;
GstValue buf;
buf.type = GST_BYTEBUFFER;
buf.data.buffer = gst_buffer(vm, 10);
count = gst_count_args(vm);
for (i = 0; i < count; ++i) {
uint8_t *string = gst_to_string(vm, gst_arg(vm, i));
gst_buffer_append(vm, buf.data.buffer, string, gst_string_length(string));
}
gst_c_return(vm, buf);
}
/* To string */
int gst_stl_tostring(Gst *vm) {
GstValue ret;
uint8_t *string = gst_to_string(vm, gst_arg(vm, 0));
ret.type = GST_STRING;
ret.data.string = string;
gst_c_return(vm, ret);
}
/* Exit */
int gst_stl_exit(Gst *vm) {
int ret;
@ -68,6 +92,8 @@ void gst_stl_load_core(GstCompiler *c) {
gst_compiler_add_global_cfunction(c, "get-class", gst_stl_getclass);
gst_compiler_add_global_cfunction(c, "set-class", gst_stl_setclass);
gst_compiler_add_global_cfunction(c, "call-for-each", gst_stl_callforeach);
gst_compiler_add_global_cfunction(c, "make-buffer", gst_stl_make_buffer);
gst_compiler_add_global_cfunction(c, "tostring", gst_stl_tostring);
gst_compiler_add_global_cfunction(c, "exit", gst_stl_exit);
}
@ -130,6 +156,32 @@ void gst_stl_load_compile(GstCompiler *c) {
gst_compiler_add_global_cfunction(c, "compile", gst_stl_compile);
}
/****/
/* Serialization */
/****/
/* Serialize data into buffer */
int gst_stl_serialize(Gst *vm) {
const char *err;
uint32_t i;
GstValue buffer = gst_arg(vm, 0);
if (buffer.type != GST_BYTEBUFFER)
gst_c_throwc(vm, "expected buffer");
for (i = 1; i < gst_count_args(vm); ++i) {
err = gst_serialize(vm, buffer.data.buffer, gst_arg(vm, i));
if (err != NULL)
gst_c_throwc(vm, err);
}
gst_c_return(vm, buffer);
}
/* Load serilization */
void gst_stl_load_serialization(GstCompiler *c) {
gst_compiler_add_global_cfunction(c, "serialize", gst_stl_serialize);
}
/* Read data from a linear sequence of memory */
/****/
/* IO */
/****/
@ -145,4 +197,5 @@ void gst_stl_load(GstCompiler *c) {
gst_stl_load_core(c);
gst_stl_load_parse(c);
gst_stl_load_compile(c);
gst_stl_load_serialization(c);
}

41
core/value.c
View File

@ -477,3 +477,44 @@ const char *gst_set_class(GstValue x, GstValue class) {
return NULL;
}
/* Get the length of an object. Returns errors for invalid types */
int gst_length(Gst *vm, GstValue x, GstValue *len) {
uint32_t length;
switch (x.type) {
default:
vm->ret = gst_load_cstring(vm, "cannot get length");
return GST_RETURN_ERROR;
case GST_STRING:
case GST_SYMBOL:
length = gst_string_length(x.data.string);
break;
case GST_ARRAY:
length = x.data.array->count;
break;
case GST_BYTEBUFFER:
length = x.data.buffer->count;
break;
case GST_TUPLE:
length = gst_tuple_length(x.data.tuple);
break;
case GST_OBJECT:
/* TODO - Check for class override */
if (x.data.object->meta != NULL) {
GstValue check = gst_object_get_cstring(
x.data.object->meta, "length");
if (check.type != GST_NIL) {
int status = gst_call(vm, check, 1, &x);
if (status == GST_RETURN_OK)
*len = vm->ret;
return status;
}
}
length = x.data.object->count;
break;
}
/* Normal numeric return */
len->type = GST_NUMBER;
len->data.number = (GstNumber) length;
return GST_RETURN_OK;
}

13
core/vm.c
View File

@ -107,6 +107,17 @@ static int gst_continue_size(Gst *vm, uint32_t stackBase) {
pc += 3;
continue;
case GST_OP_LEN: /* Length */
{
int status = gst_length(vm, stack[pc[2]], &v1);
if (status == GST_RETURN_OK)
stack[pc[1]] = v1;
else
goto vm_error;
pc += 3;
}
continue;
case GST_OP_FLS: /* Load False */
temp.type = GST_BOOLEAN;
temp.data.boolean = 0;
@ -420,6 +431,8 @@ static int gst_continue_size(Gst *vm, uint32_t stackBase) {
/* Handle errors from c functions and vm opcodes */
vm_error:
if (stack == NULL)
return GST_RETURN_ERROR;
while (gst_frame_errjmp(stack) == NULL) {
stack = gst_thread_popframe(vm, &thread);
if (thread.count < stackBase)