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Merge pull request #6 from CPunch/chunk-loading

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Chunk loading
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cpunk 2023-05-28 20:59:10 -05:00 committed by GitHub
commit 788911130d
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GPG Key ID: 4AEE18F83AFDEB23
10 changed files with 629 additions and 38 deletions
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4
Makefile
View File

@ -19,6 +19,8 @@ CHDR=\
src/cvm.h\
src/cobj.h\
src/cbaselib.h\
src/cdump.h\
src/cundump.h\
CSRC=\
src/cchunk.c\
@ -33,6 +35,8 @@ CSRC=\
src/cvm.c\
src/cobj.c\
src/cbaselib.c\
src/cdump.c\
src/cundump.c\
main.c\
COBJ=$(CSRC:.c=.o)

169
main.c
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@ -1,21 +1,29 @@
#include "cosmo.h"
#include "cbaselib.h"
#include "cchunk.h"
#include "cdebug.h"
#include "cvm.h"
#include "cparse.h"
#include "cbaselib.h"
#include "cdump.h"
#include "cmem.h"
#include "cosmo.h"
#include "cparse.h"
#include "cundump.h"
#include "cvm.h"
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
static bool _ACTIVE = false;
int cosmoB_quitRepl(CState *state, int nargs, CValue *args) {
int cosmoB_quitRepl(CState *state, int nargs, CValue *args)
{
_ACTIVE = false;
return 0; // we don't return anything
}
int cosmoB_input(CState *state, int nargs, CValue *args) {
int cosmoB_input(CState *state, int nargs, CValue *args)
{
// input() accepts the same params as print()!
for (int i = 0; i < nargs; i++) {
CObjString *str = cosmoV_toString(state, args[i]);
@ -26,16 +34,18 @@ int cosmoB_input(CState *state, int nargs, CValue *args) {
char line[1024];
fgets(line, sizeof(line), stdin);
cosmoV_pushRef(state, (CObj*)cosmoO_copyString(state, line, strlen(line)-1)); // -1 for the \n
cosmoV_pushRef(state,
(CObj *)cosmoO_copyString(state, line, strlen(line) - 1)); // -1 for the \n
return 1; // 1 return value
}
static bool interpret(CState *state, const char *script, const char *mod) {
static bool interpret(CState *state, const char *script, const char *mod)
{
bool ret;
// cosmoV_compileString pushes the result onto the stack (COBJ_ERROR or COBJ_CLOSURE)
if (cosmoV_compileString(state, script, mod)) {
if (cosmoV_compileString(state, script, mod)) {
COSMOVMRESULT res = cosmoV_call(state, 0, 0); // 0 args being passed, 0 results expected
if (res == COSMOVM_RUNTIME_ERR)
@ -50,15 +60,11 @@ static bool interpret(CState *state, const char *script, const char *mod) {
return !ret;
}
static void repl() {
static void repl(CState *state)
{
char line[1024];
_ACTIVE = true;
CState *state = cosmoV_newState();
cosmoB_loadLibrary(state);
cosmoB_loadOSLib(state);
cosmoB_loadVM(state);
// add our custom REPL functions
cosmoV_pushString(state, "quit");
cosmoV_pushCFunction(state, cosmoB_quitRepl);
@ -78,12 +84,11 @@ static void repl() {
interpret(state, line, "REPL");
}
cosmoV_freeState(state);
}
static char *readFile(const char* path) {
FILE* file = fopen(path, "rb");
static char *readFile(const char *path)
{
FILE *file = fopen(path, "rb");
if (file == NULL) {
fprintf(stderr, "Could not open file \"%s\".\n", path);
exit(74);
@ -94,7 +99,7 @@ static char *readFile(const char* path) {
size_t fileSize = ftell(file);
rewind(file);
char *buffer = (char*)malloc(fileSize + 1); // make room for the null byte
char *buffer = (char *)malloc(fileSize + 1); // make room for the null byte
if (buffer == NULL) {
fprintf(stderr, "failed to allocate!");
exit(1);
@ -106,7 +111,7 @@ static char *readFile(const char* path) {
printf("failed to read file \"%s\"!\n", path);
exit(74);
}
buffer[bytesRead] = '\0'; // place our null terminator
// close the file handler and return the script buffer
@ -114,12 +119,10 @@ static char *readFile(const char* path) {
return buffer;
}
static bool runFile(const char* fileName) {
static bool runFile(CState *state, const char *fileName)
{
bool ret;
char* script = readFile(fileName);
CState *state = cosmoV_newState();
cosmoB_loadLibrary(state);
cosmoB_loadOSLib(state);
char *script = readFile(fileName);
// add our input() function to the global table
cosmoV_pushString(state, "input");
@ -129,21 +132,119 @@ static bool runFile(const char* fileName) {
ret = interpret(state, script, fileName);
cosmoV_freeState(state);
free(script);
return ret; // let the caller know if the script failed
}
int main(int argc, const char *argv[]) {
if (argc == 1) {
repl();
} else if (argc >= 2) { // they passed a file (or more lol)
for (int i = 1; i < argc; i++) {
if (!runFile(argv[i])) {
int fileWriter(CState *state, const void *data, size_t size, const void *ud)
{
return !fwrite(data, size, 1, (FILE *)ud);
}
int fileReader(CState *state, void *data, size_t size, const void *ud)
{
return fread(data, size, 1, (FILE *)ud) != 1;
}
void compileScript(CState *state, const char *in, const char *out)
{
char *script = readFile(in);
FILE *fout = fopen(out, "wb");
if (cosmoV_compileString(state, script, in)) {
CObjFunction *func = cosmoV_readClosure(*cosmoV_getTop(state, 0))->function;
cosmoD_dump(state, func, fileWriter, (void *)fout);
} else {
cosmoV_pop(state); // pop the error off the stack
cosmoV_printError(state, state->error);
}
free(script);
fclose(fout);
printf("[!] compiled %s to %s successfully!\n", in, out);
}
void loadScript(CState *state, const char *in)
{
FILE *file;
file = fopen(in, "rb");
if (!cosmoV_undump(state, fileReader, file)) {
cosmoV_pop(state); // pop the error off the stack
cosmoV_printError(state, state->error);
return;
};
printf("[!] loaded %s!\n", in);
COSMOVMRESULT res = cosmoV_call(state, 0, 0); // 0 args being passed, 0 results expected
if (res == COSMOVM_RUNTIME_ERR)
cosmoV_printError(state, state->error);
fclose(file);
}
void printUsage(const char *name)
{
printf("Usage: %s [-clsr] [args]\n\n", name);
printf("available options are:\n"
"-c <in> <out>\tcompile <in> and dump to <out>\n"
"-l <in>\t\tload dump from <in>\n"
"-s <in...>\tcompile and run <in...> script(s)\n"
"-r\t\tstart the repl\n\n");
}
int main(int argc, char *const argv[])
{
CState *state = cosmoV_newState();
cosmoB_loadLibrary(state);
cosmoB_loadOSLib(state);
cosmoB_loadVM(state);
int opt;
bool isValid = false;
while ((opt = getopt(argc, argv, "clsr")) != -1) {
switch (opt) {
case 'c':
if (optind >= argc - 1) {
printf("Usage: %s -c <in> <out>\n", argv[0]);
exit(EXIT_FAILURE);
} else {
compileScript(state, argv[optind], argv[optind + 1]);
}
isValid = true;
break;
case 'l':
if (optind >= argc) {
printf("Usage: %s -l <in>\n", argv[0]);
exit(EXIT_FAILURE);
} else {
loadScript(state, argv[optind]);
}
isValid = true;
break;
case 's':
for (int i = optind; i < argc; i++) {
if (!runFile(state, argv[i])) {
printf("failed to run %s!\n", argv[i]);
exit(EXIT_FAILURE);
}
}
isValid = true;
break;
case 'r':
repl(state);
isValid = true;
break;
}
}
if (!isValid) {
printUsage(argv[0]);
}
cosmoV_freeState(state);
return 0;
}

2
src/cbaselib.c
View File

@ -980,6 +980,4 @@ void cosmoB_loadVM(CState *state)
// register "vm" to the global table
cosmoV_register(state, 1);
printf("[WARNING] the vm.* library has been loaded!\n");
}

204
src/cdump.c Normal file
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@ -0,0 +1,204 @@
#include "cdump.h"
#include "cdebug.h"
#include "cmem.h"
#include "cobj.h"
#include "cvalue.h"
#include "cvm.h"
typedef struct
{
CState *state;
const void *userData;
cosmo_Writer writer;
int writerStatus;
} DumpState;
static bool writeCValue(DumpState *dstate, CValue val);
#define check(e) \
if (!e) { \
return false; \
}
static void initDumpState(CState *state, DumpState *dstate, cosmo_Writer writer,
const void *userData)
{
dstate->state = state;
dstate->userData = userData;
dstate->writer = writer;
dstate->writerStatus = 0;
}
static bool writeBlock(DumpState *dstate, const void *data, size_t size)
{
if (dstate->writerStatus == 0) {
dstate->writerStatus = dstate->writer(dstate->state, data, size, dstate->userData);
}
return dstate->writerStatus == 0;
}
static bool writeu8(DumpState *dstate, uint8_t d)
{
return writeBlock(dstate, &d, sizeof(uint8_t));
}
static bool writeu32(DumpState *dstate, uint32_t d)
{
return writeBlock(dstate, &d, sizeof(uint32_t));
}
static bool writeSize(DumpState *dstate, size_t d)
{
return writeBlock(dstate, &d, sizeof(size_t));
}
static bool writeVector(DumpState *dstate, const void *data, size_t size, size_t count)
{
check(writeSize(dstate, count));
check(writeBlock(dstate, data, size * count));
return true;
}
static bool writeHeader(DumpState *dstate)
{
check(writeBlock(dstate, COSMO_MAGIC, COSMO_MAGIC_LEN));
/* after the magic, we write some platform information */
check(writeu8(dstate, cosmoD_isBigEndian()));
check(writeu8(dstate, sizeof(cosmo_Number)));
check(writeu8(dstate, sizeof(size_t)));
check(writeu8(dstate, sizeof(int)));
return true;
}
static bool writeCObjString(DumpState *dstate, CObjString *obj)
{
if (obj == NULL) { /* this is in case cobjfunction's name or module strings are null */
check(writeu32(dstate, 0));
return true;
}
/* write string length */
check(writeu32(dstate, obj->length));
/* write string data */
check(writeBlock(dstate, obj->str, obj->length));
return true;
}
static bool writeCObjFunction(DumpState *dstate, CObjFunction *obj)
{
check(writeCObjString(dstate, obj->name));
check(writeCObjString(dstate, obj->module));
check(writeu32(dstate, obj->args));
check(writeu32(dstate, obj->upvals));
check(writeu8(dstate, obj->variadic));
/* write chunk info */
check(writeVector(dstate, obj->chunk.buf, sizeof(uint8_t), obj->chunk.count));
/* write line info */
check(writeVector(dstate, obj->chunk.lineInfo, sizeof(int), obj->chunk.count));
/* write constants */
check(writeSize(dstate, obj->chunk.constants.count));
for (int i = 0; i < obj->chunk.constants.count; i++) {
check(writeCValue(dstate, obj->chunk.constants.values[i]));
}
return true;
}
static bool writeCObj(DumpState *dstate, CObj *obj)
{
/*
we can kind of cheat here since our parser only emits a few very limited CObjs...
CChunks will only ever have the following CObj's in their constant table:
- COBJ_STRING
- COBJ_FUNCTION
the rest of the objects are created during runtime. yay!
*/
CObjType t = cosmoO_readType(obj);
/* write cobj type */
writeu8(dstate, t);
/* write object payload/body */
switch (t) {
case COBJ_STRING:
check(writeCObjString(dstate, (CObjString *)obj));
break;
case COBJ_FUNCTION:
check(writeCObjFunction(dstate, (CObjFunction *)obj));
break;
default:
cosmoV_error(dstate->state, "invalid cobj type: %d", t);
return false;
}
return true;
}
#define WRITE_VAR(dstate, type, expression) \
{ \
type _tmp = expression; \
check(writeBlock(dstate, &_tmp, sizeof(_tmp))); \
break; \
}
static bool writeCValue(DumpState *dstate, CValue val)
{
CosmoType t = GET_TYPE(val);
/* write value type */
writeu8(dstate, t);
/* write value payload/body */
switch (t) {
case COSMO_TNUMBER:
WRITE_VAR(dstate, cosmo_Number, cosmoV_readNumber(val))
case COSMO_TBOOLEAN:
WRITE_VAR(dstate, bool, cosmoV_readBoolean(val))
case COSMO_TREF:
check(writeCObj(dstate, cosmoV_readRef(val)));
break;
case COSMO_TNIL: /* no body */
break;
default:
cosmoV_error(dstate->state, "invalid value type: %d", t);
return false;
}
return true;
}
#undef WRITE_VAR
bool cosmoD_isBigEndian()
{
union
{
uint32_t i;
uint8_t c[4];
} _indxint = {0xDEADB33F};
return _indxint.c[0] == 0xDE;
}
int cosmoD_dump(CState *state, CObjFunction *func, cosmo_Writer writer, const void *userData)
{
DumpState dstate;
initDumpState(state, &dstate, writer, userData);
check(writeHeader(&dstate));
check(writeCObjFunction(&dstate, func));
return dstate.writerStatus;
}

17
src/cdump.h Normal file
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@ -0,0 +1,17 @@
#ifndef COSMO_DUMP_H
#define COSMO_DUMP_H
#include "cobj.h"
#include "cosmo.h"
#include <stdio.h>
#define COSMO_MAGIC "COS\x12"
#define COSMO_MAGIC_LEN 4
bool cosmoD_isBigEndian();
/* returns non-zero on error */
int cosmoD_dump(CState *state, CObjFunction *func, cosmo_Writer writer, const void *userData);
#endif

3
src/cosmo.h
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@ -45,6 +45,9 @@ typedef struct CObjClosure CObjClosure;
typedef uint8_t INSTRUCTION;
typedef int (*cosmo_Reader)(CState *state, void *data, size_t size, const void *ud);
typedef int (*cosmo_Writer)(CState *state, const void *data, size_t size, const void *ud);
#define COSMOMAX_UPVALS 80
#define FRAME_MAX 64
#define STACK_MAX (256 * FRAME_MAX)

219
src/cundump.c Normal file
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@ -0,0 +1,219 @@
#include "cundump.h"
#include "cchunk.h"
#include "cdump.h"
#include "cmem.h"
#include "cvm.h"
typedef struct
{
CState *state;
const void *userData;
cosmo_Reader reader;
int readerStatus;
} UndumpState;
static bool readCValue(UndumpState *udstate, CValue *val);
#define check(e) \
if (!e) { \
return false; \
}
static void initUndumpState(CState *state, UndumpState *udstate, cosmo_Reader reader,
const void *userData)
{
udstate->state = state;
udstate->userData = userData;
udstate->reader = reader;
udstate->readerStatus = 0;
}
static bool readBlock(UndumpState *udstate, void *data, size_t size)
{
if (udstate->readerStatus == 0) {
/* if reader returns 1, we expect an error was thrown */
udstate->readerStatus = udstate->reader(udstate->state, data, size, udstate->userData);
}
return udstate->readerStatus == 0;
}
static bool readu8(UndumpState *udstate, uint8_t *d)
{
return readBlock(udstate, d, sizeof(uint8_t));
}
static bool readu32(UndumpState *udstate, uint32_t *d)
{
return readBlock(udstate, d, sizeof(uint32_t));
}
static bool readSize(UndumpState *udstate, size_t *d)
{
return readBlock(udstate, d, sizeof(size_t));
}
static bool readVector(UndumpState *udstate, void **data, size_t size, size_t *count)
{
check(readSize(udstate, count));
*data = cosmoM_xmalloc(udstate->state, (*count) * size);
return readBlock(udstate, *data, (*count) * size);
}
#define checku8(udstate, d, tmp) \
check(readu8(udstate, &tmp)); \
if (d != tmp) { \
cosmoV_error(udstate->state, "bad header!"); \
return false; \
}
static bool checkHeader(UndumpState *udstate)
{
char magic[COSMO_MAGIC_LEN];
uint8_t tmp;
/* check header */
check(readBlock(udstate, magic, COSMO_MAGIC_LEN));
if (memcmp(magic, COSMO_MAGIC, COSMO_MAGIC_LEN) != 0) {
cosmoV_error(udstate->state, "bad header!");
return false;
}
/* after the magic, we read some platform information */
checku8(udstate, cosmoD_isBigEndian(), tmp);
checku8(udstate, sizeof(cosmo_Number), tmp);
checku8(udstate, sizeof(size_t), tmp);
checku8(udstate, sizeof(int), tmp);
return true;
}
#undef checku8
static bool readCObjString(UndumpState *udstate, CObjString **str)
{
uint32_t size;
char *data;
check(readu32(udstate, (uint32_t *)&size));
if (size == 0) { /* empty string */
*str = NULL;
return true;
}
data = cosmoM_xmalloc(udstate->state, size + 1);
check(readBlock(udstate, (void *)data, size));
data[size] = '\0'; /* add NULL-terminator */
*str = cosmoO_takeString(udstate->state, data, size);
return true;
}
static bool readCObjFunction(UndumpState *udstate, CObjFunction **func)
{
size_t constants;
CValue val;
*func = cosmoO_newFunction(udstate->state);
/* make sure our GC can see that we're currently using this function (and the values it uses) */
cosmoV_pushRef(udstate->state, (CObj *)*func);
check(readCObjString(udstate, &(*func)->name));
check(readCObjString(udstate, &(*func)->module));
check(readu32(udstate, (uint32_t *)&(*func)->args));
check(readu32(udstate, (uint32_t *)&(*func)->upvals));
check(readu8(udstate, (uint8_t *)&(*func)->variadic));
/* read chunk info */
check(
readVector(udstate, (void **)&(*func)->chunk.buf, sizeof(uint8_t), &(*func)->chunk.count));
check(
readVector(udstate, (void **)&(*func)->chunk.lineInfo, sizeof(int), &(*func)->chunk.count));
/* read constants */
check(readSize(udstate, &constants));
for (int i = 0; i < constants; i++) {
check(readCValue(udstate, &val));
addConstant(udstate->state, &(*func)->chunk, val);
}
/* pop function off stack */
cosmoV_pop(udstate->state);
return true;
}
static bool readCObj(UndumpState *udstate, CObj **obj)
{
uint8_t type;
check(readu8(udstate, &type));
switch (type) {
case COBJ_STRING:
return readCObjString(udstate, (CObjString **)obj);
case COBJ_FUNCTION:
return readCObjFunction(udstate, (CObjFunction **)obj);
default:
cosmoV_error(udstate->state, "unknown object type!");
return false;
}
return true;
}
#define READ_VAR(udstate, val, type, creator) \
{ \
type _tmp; \
check(readBlock(udstate, &_tmp, sizeof(type))); \
*val = creator(_tmp); \
break; \
}
static bool readCValue(UndumpState *udstate, CValue *val)
{
uint8_t t;
check(readu8(udstate, &t));
switch (t) {
case COSMO_TNUMBER:
READ_VAR(udstate, val, cosmo_Number, cosmoV_newNumber)
case COSMO_TBOOLEAN:
READ_VAR(udstate, val, bool, cosmoV_newBoolean)
case COSMO_TREF: {
CObj *obj;
check(readCObj(udstate, (CObj **)&obj));
*val = cosmoV_newRef(obj);
break;
}
case COSMO_TNIL:
*val = cosmoV_newNil();
break;
default:
cosmoV_error(udstate->state, "invalid value type: %d", t);
return false;
}
return true;
}
#undef READ_VAR
#undef check
int cosmoD_undump(CState *state, cosmo_Reader reader, const void *userData, CObjFunction **func)
{
UndumpState udstate;
initUndumpState(state, &udstate, reader, userData);
if (!checkHeader(&udstate)) {
return 1;
}
if (!readCObjFunction(&udstate, func)) {
return 1;
}
cosmoV_pushRef(state, (CObj *)*func);
return udstate.readerStatus;
}

12
src/cundump.h Normal file
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@ -0,0 +1,12 @@
#ifndef COSMO_UNDUMP_H
#define COSMO_UNDUMP_H
#include "cobj.h"
#include "cosmo.h"
#include <stdio.h>
/* returns non-zero on error */
int cosmoD_undump(CState *state, cosmo_Reader reader, const void *userData, CObjFunction **func);
#endif

25
src/cvm.c
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@ -4,6 +4,7 @@
#include "cmem.h"
#include "cparse.h"
#include "cstate.h"
#include "cundump.h"
#include <math.h>
#include <stdarg.h>
@ -30,6 +31,28 @@ COSMO_API void cosmo_insert(CState *state, int indx, CValue val)
state->top++;
}
COSMO_API bool cosmoV_undump(CState *state, cosmo_Reader reader, const void *ud)
{
CObjFunction *func;
if (cosmoD_undump(state, reader, ud, &func)) {
// fail recovery
state->panic = false;
cosmoV_pushRef(state, (CObj *)state->error);
return false;
};
#ifdef VM_DEBUG
disasmChunk(&func->chunk, func->name ? func->name->str : UNNAMEDCHUNK, 0);
#endif
// push function onto the stack so it doesn't it cleaned up by the GC, at the same stack
// location put our closure
cosmoV_pushRef(state, (CObj *)func);
*(cosmoV_getTop(state, 0)) = cosmoV_newRef(cosmoO_newClosure(state, func));
return true;
}
COSMO_API bool cosmoV_compileString(CState *state, const char *src, const char *name)
{
CObjFunction *func;
@ -46,7 +69,7 @@ COSMO_API bool cosmoV_compileString(CState *state, const char *src, const char *
return true;
}
// fail
// fail recovery
state->panic = false;
cosmoV_pushRef(state, (CObj *)state->error);
return false;

12
src/cvm.h
View File

@ -38,7 +38,7 @@ COSMO_API void cosmo_insert(CState *state, int indx, CValue val);
COSMO_API bool cosmoV_registerProtoObject(CState *state, CObjType objType, CObjObject *obj);
/*
compiles string into a <closure>, if successful, <closure> will be pushed onto the stack
compiles string into a <closure>. if successful, <closure> will be pushed onto the stack
otherwise the <error> will be pushed.
returns:
@ -47,6 +47,16 @@ COSMO_API bool cosmoV_registerProtoObject(CState *state, CObjType objType, CObjO
*/
COSMO_API bool cosmoV_compileString(CState *state, const char *src, const char *name);
/*
loads a <closure> from a dump. if successful, <closure> will be pushed onto the stack
otherwise the <error> will be pushed.
returns:
false : <error> is at the top of the stack
true : <closure> is at the top of the stack
*/
COSMO_API bool cosmoV_undump(CState *state, cosmo_Reader reader, const void *ud);
/*
expects object to be pushed, then the key.