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added foreach()

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This commit is contained in:
CPunch 2020-12-12 18:16:31 -06:00
parent 219a87c79c
commit ec8f5e7e4f
3 changed files with 42 additions and 0 deletions
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36
src/cbaselib.c
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@ -7,6 +7,7 @@
void cosmoB_loadLibrary(CState *state) {
cosmoM_freezeGC(state);
cosmoV_register(state, "print", cosmoV_newObj(cosmoO_newCFunction(state, cosmoB_print)));
cosmoV_register(state, "foreach", cosmoV_newObj(cosmoO_newCFunction(state, cosmoB_foreach)));
cosmoM_unfreezeGC(state);
}
@ -20,6 +21,41 @@ CValue cosmoB_print(CState *state, int nargs, CValue *args) {
return cosmoV_newNil(); // print doesn't return any args
}
CValue cosmoB_foreach(CState *state, int nargs, CValue *args) {
if (nargs != 2) {
cosmoV_error(state, "foreach() expected 2 parameters, got %d!", nargs);
return cosmoV_newNil();
}
if (!IS_DICT(args[0])) {
cosmoV_error(state, "foreach() expected first parameter to be <dictionary>, got %s!", cosmoV_typeStr(args[0]));
return cosmoV_newNil();
}
if (!IS_CALLABLE(args[1])) {
cosmoV_error(state, "foreach() expected second parameter to be callable, got %s!", cosmoV_typeStr(args[1]));
return cosmoV_newNil();
}
// loop through dictonary table, calling args[1] on active entries
CObjDict *dict = (CObjDict*)cosmoV_readObj(args[0]);
for (int i = 0; i < dict->tbl.capacity; i++) {
CTableEntry *entry = &dict->tbl.table[i];
if (!IS_NIL(entry->key)) {
// push key & value, then call args[1]
cosmoV_pushValue(state, args[1]);
cosmoV_pushValue(state, entry->key);
cosmoV_pushValue(state, entry->val);
cosmoV_call(state, 2);
cosmoV_pop(state); // throw away the return value
}
}
return cosmoV_newNil();
}
CValue cosmoB_dsetProto(CState *state, int nargs, CValue *args) {
if (nargs == 2) {
CObjObject *obj = cosmoV_readObject(args[0]); // object to set proto too

1
src/cbaselib.h
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@ -7,5 +7,6 @@
COSMO_API void cosmoB_loadLibrary(CState *state);
COSMO_API void cosmoB_loadDebug(CState *state);
COSMO_API CValue cosmoB_print(CState *state, int nargs, CValue *args);
COSMO_API CValue cosmoB_foreach(CState *state, int nargs, CValue *args);
#endif

5
src/cobj.h
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@ -111,6 +111,11 @@ static inline bool isObjType(CValue val, CObjType type) {
return IS_OBJ(val) && cosmoV_readObj(val)->type == type;
}
// just protects against macro expansion
static inline bool IS_CALLABLE(CValue val) {
return IS_CLOSURE(val) || IS_CFUNCTION(val);
}
CObj *cosmoO_allocateBase(CState *state, size_t sz, CObjType type);
void cosmoO_free(CState *state, CObj* obj);