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#include <stdio.h>
#include <string.h>
#include "val.h"
#include "mem.h"
#include "ht.h"
static ObjString *objstring_create(State*, char*, size_t, uint32_t);
ObjString *objstring_copy(State *S, char *src, size_t len) {
uint32_t hash = hash_string(src, len);
ObjString *interned = ht_findstring(S, &S->strings, src, len, hash);
if (interned != NULL) return interned;
char *d = NEW_ARR(S, char, 1+len);
memcpy(d, src, len);
d[len] = '\0';
return objstring_create(S, d, len, hash);
}
ObjString *objstring_copy_cstr(State *S, char *str) {
size_t len = strlen(str);
return objstring_copy(S, str, len);
}
ObjString *objstring_take(State *S, char *src, size_t len) {
uint32_t hash = hash_string(src, len);
ObjString *interned = ht_findstring(S, &S->strings, src, len, hash);
if (interned != NULL) {
FREE_ARR(S, src, char, len+1);
return interned;
};
return objstring_create(S, src, len, hash);
}
static ObjString *objstring_create(State *S, char *src, size_t len, uint32_t hash) {
// assumes already deduplicated
// and data is already owned
ObjString *o = NEW_OBJ(S, ObjString, OTY_STRING);
o->len = len;
o->d = src;
o->hash = hash;
ht_put(S, &S->strings, o, VAL_TRUE);
return o;
}
void print_val(Val v) {
switch (v.ty) {
case TY_NIL:
printf("nil");
break;
case TY_NUM:
printf("%g",AS_NUM(v));
break;
case TY_BOOL:
printf("%s",AS_BOOL(v) ? "true" : "false");
break;
case TY_OBJ:
switch (AS_OBJ(v)->oty) {
case OTY_STRING:
printf("%s", AS_CSTRING(v));
break;
case OTY_FUNC:
printf("[function Function]");
break;
}
break;
}
}
void println_val(Val v) {
print_val(v);
putchar('\n');
}
bool is_truthy(Val v) {
if (IS_BOOL(v)) return AS_BOOL(v);
if (IS_NIL(v)) return false;
return true;
}
bool val_equal(Val a, Val b) {
if (a.ty != b.ty) return false;
switch (a.ty) {
case TY_NIL: return true;
case TY_NUM: return AS_NUM(a) == AS_NUM(b);
case TY_BOOL: return AS_BOOL(a) == AS_BOOL(b);
case TY_OBJ: return AS_OBJ(a) == AS_OBJ(b);
default: return false;
}
}
const char *typename_str(Val v) {
switch(v.ty) {
case TY_NIL: return "nil";
case TY_NUM: return "num";
case TY_BOOL: return "bool";
case TY_OBJ:
switch (AS_OBJ(v)->oty) {
case OTY_STRING: return "String";
case OTY_FUNC: return "Func";
}
break;
}
return "???";
}
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