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https://github.com/CPunch/Cosmo.git
synced 2024-11-05 00:00:10 +00:00
Added cosmoV_pushFString(), and cosmoO_pushVFString().
cosmoV_error now pushes the error string onto the stack, as well as uses cosmoO_VFString to format strings. cosmoV_concat is now entirely self contained, and is now stack based. Push the CValues you want to concat into strings onto the stack and call cosmoV_concat with the # of values you pushed.
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de3a89ad4f
commit
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40
src/cobj.c
40
src/cobj.c
@ -224,6 +224,46 @@ CObjString *cosmoO_allocateString(CState *state, const char *str, size_t sz, uin
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return strObj;
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}
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CObjString *cosmoO_pushVFString(CState *state, const char *format, va_list args) {
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StkPtr start = state->top;
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while (true) {
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const char *end = strchr(format, '%'); // grab the next occurrence of '%'
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if (end == NULL) // the end, no '%' found
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break;
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// push the string before '%'
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cosmoV_pushLString(state, format, (end - format));
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char c = *(end+1); // the character right after '%'
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switch (c) {
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case 'd': { // int
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cosmoV_pushNumber(state, va_arg(args, int));
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break;
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}
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case 'f': { // double
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cosmoV_pushNumber(state, va_arg(args, double));
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break;
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}
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case 's': { // const char *
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cosmoV_pushString(state, va_arg(args, char *));
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break;
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}
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default: {
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char temp[2];
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temp[0] = '%';
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temp[1] = c;
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cosmoV_pushLString(state, temp, 2);
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}
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}
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format = end + 2; // + 2 because of % and the following character
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}
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cosmoV_pushString(state, format); // push the rest of the string
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cosmoV_concat(state, state->top - start); // use cosmoV_concat to concat all the strings on the stack
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return cosmoV_readString(*start); // start should be state->top - 1
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}
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bool cosmoO_getObject(CState *state, CObjObject *object, CValue key, CValue *val) {
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if (!cosmoT_get(&object->tbl, key, val)) { // if the field doesn't exist in the object, check the proto
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if (cosmoO_getIString(state, object, ISTRING_GETTER, val) && IS_OBJECT(*val) && cosmoO_getObject(state, cosmoV_readObject(*val), key, val)) {
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@ -154,6 +154,15 @@ CObjString *cosmoO_takeString(CState *state, char *str, size_t sz);
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// allocates a CObjStruct pointing directly to *str
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CObjString *cosmoO_allocateString(CState *state, const char *str, size_t sz, uint32_t hash);
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/*
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formats strings to push onto the VM stack, formatting supported:
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'%d' - decimal numbers [int]
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'%f' - floating point [double]
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'%s' - strings [const char*]
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*/
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CObjString *cosmoO_pushVFString(CState *state, const char *format, va_list args);
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COSMO_API void printObject(CObj *o);
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const char *cosmoO_typeStr(CObj* obj);
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62
src/cvm.c
62
src/cvm.c
@ -6,6 +6,13 @@
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#include <stdarg.h>
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#include <string.h>
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COSMO_API void cosmoV_pushFString(CState *state, const char *format, ...) {
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va_list args;
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va_start(args, format);
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cosmoO_pushVFString(state, format, args);
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va_end(args);
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}
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void cosmoV_error(CState *state, const char *format, ...) {
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if (state->panic)
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return;
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@ -37,14 +44,12 @@ void cosmoV_error(CState *state, const char *format, ...) {
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va_list args;
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va_start(args, format);
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vfprintf(stderr, format, args);
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CObjString *errString = cosmoO_pushVFString(state, format, args);
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va_end(args);
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fputs("\n", stderr);
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// TODO: push error onto the stack :P
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state->panic = true;
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printf("%.*s\n", errString->length, errString->str);
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cosmoV_printStack(state);
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state->panic = true;
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}
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CObjUpval *captureUpvalue(CState *state, CValue *local) {
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@ -97,15 +102,30 @@ void popCallFrame(CState *state, int offset) {
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state->frameCount--;
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}
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CObjString *cosmoV_concat(CState *state, CObjString *strA, CObjString *strB) {
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size_t sz = strA->length + strB->length;
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char *buf = cosmoM_xmalloc(state, sz + 1); // +1 for null terminator
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memcpy(buf, strA->str, strA->length);
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memcpy(buf + strA->length, strB->str, strB->length);
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buf[sz] = '\0';
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void cosmoV_concat(CState *state, int vals) {
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StkPtr start = state->top - vals;
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StkPtr end = cosmoV_getTop(state, 0);
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return cosmoO_takeString(state, buf, sz);
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CObjString *result = cosmoV_toString(state, *start);
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for (StkPtr current = start + 1; current <= end; current++) {
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cosmoV_pushValue(state, cosmoV_newObj(result)); // so our GC can find our current result string
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CObjString *otherStr = cosmoV_toString(state, *current);
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cosmoV_pushValue(state, cosmoV_newObj(otherStr)); // also so our GC won't free otherStr
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// concat the two strings together
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size_t sz = result->length + otherStr->length;
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char *buf = cosmoM_xmalloc(state, sz + 1); // +1 for null terminator
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memcpy(buf, result->str, result->length);
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memcpy(buf + result->length, otherStr->str, otherStr->length);
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buf[sz] = '\0';
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result = cosmoO_takeString(state, buf, sz);
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cosmoV_setTop(state, 2); // pop result & otherStr off the stack
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}
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state->top = start;
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cosmoV_pushValue(state, cosmoV_newObj(result));
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}
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int cosmoV_execute(CState *state);
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@ -726,21 +746,7 @@ int cosmoV_execute(CState *state) {
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}
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case OP_CONCAT: {
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uint8_t vals = READBYTE();
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StkPtr start = state->top - vals;
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StkPtr end = cosmoV_getTop(state, 0);
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CObjString *result = cosmoV_toString(state, *start);
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for (StkPtr current = start + 1; current <= end; current++) {
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cosmoV_pushValue(state, cosmoV_newObj(result)); // so our GC can find our current result string
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CObjString *otherStr = cosmoV_toString(state, *current);
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cosmoV_pushValue(state, cosmoV_newObj(otherStr)); // also so our GC won't free otherStr
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result = cosmoV_concat(state, result, otherStr);
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cosmoV_setTop(state, 2); // pop result & otherStr off the stack
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}
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state->top = start;
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cosmoV_pushValue(state, cosmoV_newObj(result));
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cosmoV_concat(state, vals);
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break;
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}
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case OP_INCLOCAL: { // this leaves the value on the stack
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@ -17,6 +17,8 @@ COSMO_API COSMOVMRESULT cosmoV_call(CState *state, int args, int nresults);
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COSMO_API void cosmoV_makeObject(CState *state, int pairs);
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COSMO_API void cosmoV_makeDictionary(CState *state, int pairs);
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COSMO_API bool cosmoV_getObject(CState *state, CObjObject *object, CValue key, CValue *val);
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COSMO_API void cosmoV_concat(CState *state, int vals);
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COSMO_API void cosmoV_pushFString(CState *state, const char *format, ...);
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COSMO_API void cosmoV_error(CState *state, const char *format, ...);
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// nice to have wrappers
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@ -52,6 +52,7 @@ static void repl() {
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cosmoB_loadLibrary(state);
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cosmoB_loadDebug(state);
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// add our custom REPL functions
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cosmoV_pushString(state, "quit");
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cosmoV_pushCFunction(state, cosmoB_quitRepl);
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@ -111,6 +112,12 @@ static void runFile(const char* fileName) {
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CState *state = cosmoV_newState();
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cosmoB_loadLibrary(state);
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// add our input() function to the global table
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cosmoV_pushString(state, "input");
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cosmoV_pushCFunction(state, cosmoB_input);
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cosmoV_register(state, 1);
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interpret(state, script, fileName);
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cosmoV_freeState(state);
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