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ant/src/modules/reflect.c
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reflect.c
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#include <stdlib.h>
#include <string.h>
#include "ant.h"
#include "runtime.h"
#include "modules/reflect.h"
#include "modules/symbol.h"
static jsval_t reflect_get(struct js *js, jsval_t *args, int nargs) {
if (nargs < 2) return js_mkundef();
jsval_t target = args[0];
jsval_t key = args[1];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) return js_mkundef();
if (js_type(key) != JS_STR) return js_mkundef();
char *key_str = js_getstr(js, key, NULL);
if (!key_str) return js_mkundef();
return js_get(js, target, key_str);
}
static jsval_t reflect_set(struct js *js, jsval_t *args, int nargs) {
if (nargs < 3) return js_mkfalse();
jsval_t target = args[0];
jsval_t key = args[1];
jsval_t value = args[2];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) return js_mkfalse();
if (js_type(key) != JS_STR) return js_mkfalse();
char *key_str = js_getstr(js, key, NULL);
if (!key_str) return js_mkfalse();
js_set(js, target, key_str, value);
return js_mktrue();
}
static jsval_t reflect_has(struct js *js, jsval_t *args, int nargs) {
if (nargs < 2) return js_mkfalse();
jsval_t target = args[0];
jsval_t key = args[1];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) return js_mkfalse();
if (js_type(key) != JS_STR) return js_mkfalse();
char *key_str = js_getstr(js, key, NULL);
if (!key_str) return js_mkfalse();
jsval_t val = js_get(js, target, key_str);
return js_type(val) != JS_UNDEF ? js_mktrue() : js_mkfalse();
}
static jsval_t reflect_delete_property(struct js *js, jsval_t *args, int nargs) {
if (nargs < 2) return js_mkfalse();
jsval_t target = args[0];
jsval_t key = args[1];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) return js_mkfalse();
if (js_type(key) != JS_STR) return js_mkfalse();
size_t key_len;
char *key_str = js_getstr(js, key, &key_len);
if (!key_str) return js_mkfalse();
jsval_t result = js_setprop(js, target, key, js_mkundef());
(void)result;
return js_mktrue();
}
static jsval_t reflect_own_keys(struct js *js, jsval_t *args, int nargs) {
if (nargs < 1) return js_mkarr(js);
jsval_t target = args[0];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) {
return js_mkerr(js, "Reflect.ownKeys called on non-object");
}
jsval_t temp_keys[256];
int count = 0;
js_prop_iter_t iter = js_prop_iter_begin(js, target);
const char *key;
size_t key_len;
jsval_t value;
while (js_prop_iter_next(&iter, &key, &key_len, &value) && count < 256) {
if (key_len >= 9 && memcmp(key, STR_PROTO, STR_PROTO_LEN) == 0) continue;
if (key_len >= 2 && key[0] == '_' && key[1] == '_') continue;
temp_keys[count++] = js_mkstr(js, key, key_len);
}
js_prop_iter_end(&iter);
jsval_t keys_arr = js_mkarr(js);
for (int i = count - 1; i >= 0; i--) {
js_arr_push(js, keys_arr, temp_keys[i]);
}
return keys_arr;
}
static jsval_t reflect_construct(struct js *js, jsval_t *args, int nargs) {
if (nargs < 2) {
return js_mkerr(js, "Reflect.construct requires at least 2 arguments");
}
jsval_t target = args[0];
jsval_t args_arr = args[1];
if (js_type(target) != JS_FUNC) {
return js_mkerr(js, "Reflect.construct: first argument must be a constructor");
}
jsval_t length_val = js_get(js, args_arr, "length");
int arg_count = 0;
if (js_type(length_val) == JS_NUM) {
arg_count = (int)js_getnum(length_val);
}
jsval_t *call_args = NULL;
if (arg_count > 0) {
call_args = malloc(arg_count * sizeof(jsval_t));
if (!call_args) return js_mkerr(js, "Out of memory");
for (int i = 0; i < arg_count; i++) {
char idx[16];
snprintf(idx, sizeof(idx), "%d", i);
call_args[i] = js_get(js, args_arr, idx);
}
}
jsval_t new_obj = js_mkobj(js);
jsval_t result = js_call_with_this(js, target, new_obj, call_args, arg_count);
if (call_args) free(call_args);
if (js_type(result) == JS_OBJ || js_type(result) == JS_FUNC) {
return result;
}
return new_obj;
}
static jsval_t reflect_apply(struct js *js, jsval_t *args, int nargs) {
if (nargs < 3) {
return js_mkerr(js, "Reflect.apply requires 3 arguments");
}
jsval_t target = args[0];
jsval_t this_arg = args[1];
jsval_t args_arr = args[2];
if (js_type(target) != JS_FUNC) {
return js_mkerr(js, "Reflect.apply: first argument must be a function");
}
jsval_t length_val = js_get(js, args_arr, "length");
int arg_count = 0;
if (js_type(length_val) == JS_NUM) {
arg_count = (int)js_getnum(length_val);
}
jsval_t *call_args = NULL;
if (arg_count > 0) {
call_args = malloc(arg_count * sizeof(jsval_t));
if (!call_args) return js_mkerr(js, "Out of memory");
for (int i = 0; i < arg_count; i++) {
char idx[16];
snprintf(idx, sizeof(idx), "%d", i);
call_args[i] = js_get(js, args_arr, idx);
}
}
jsval_t result = js_call_with_this(js, target, this_arg, call_args, arg_count);
if (call_args) free(call_args);
return result;
}
static jsval_t reflect_get_own_property_descriptor(struct js *js, jsval_t *args, int nargs) {
if (nargs < 2) return js_mkundef();
jsval_t target = args[0];
jsval_t key = args[1];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) return js_mkundef();
if (js_type(key) != JS_STR) return js_mkundef();
char *key_str = js_getstr(js, key, NULL);
if (!key_str) return js_mkundef();
jsval_t value = js_get(js, target, key_str);
if (js_type(value) == JS_UNDEF) return js_mkundef();
jsval_t desc = js_mkobj(js);
js_set(js, desc, "value", value);
js_set(js, desc, "writable", js_mktrue());
js_set(js, desc, "enumerable", js_mktrue());
js_set(js, desc, "configurable", js_mktrue());
return desc;
}
static jsval_t reflect_define_property(struct js *js, jsval_t *args, int nargs) {
if (nargs < 3) return js_mkfalse();
jsval_t target = args[0];
jsval_t key = args[1];
jsval_t descriptor = args[2];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) return js_mkfalse();
if (js_type(key) != JS_STR) return js_mkfalse();
if (js_type(descriptor) != JS_OBJ) return js_mkfalse();
char *key_str = js_getstr(js, key, NULL);
if (!key_str) return js_mkfalse();
jsval_t value = js_get(js, descriptor, "value");
js_set(js, target, key_str, value);
return js_mktrue();
}
static jsval_t reflect_get_prototype_of(struct js *js, jsval_t *args, int nargs) {
if (nargs < 1) {
return js_mkerr(js, "Reflect.getPrototypeOf requires an argument");
}
jsval_t target = args[0];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) {
return js_mkerr(js, "Reflect.getPrototypeOf: argument must be an object");
}
return js_get_proto(js, target);
}
static jsval_t reflect_set_prototype_of(struct js *js, jsval_t *args, int nargs) {
if (nargs < 2) return js_mkfalse();
jsval_t target = args[0];
jsval_t proto = args[1];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) return js_mkfalse();
int pt = js_type(proto);
if (pt != JS_OBJ && pt != JS_FUNC && pt != JS_NULL) return js_mkfalse();
js_set_proto(js, target, proto);
return js_mktrue();
}
static jsval_t reflect_is_extensible(struct js *js, jsval_t *args, int nargs) {
if (nargs < 1) return js_mkfalse();
jsval_t target = args[0];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) return js_mkfalse();
jsval_t frozen = js_get_slot(js, target, SLOT_FROZEN);
if (js_type(frozen) == JS_TRUE) return js_mkfalse();
jsval_t sealed = js_get_slot(js, target, SLOT_SEALED);
if (js_type(sealed) == JS_TRUE) return js_mkfalse();
return js_mktrue();
}
static jsval_t reflect_prevent_extensions(struct js *js, jsval_t *args, int nargs) {
if (nargs < 1) return js_mkfalse();
jsval_t target = args[0];
int t = js_type(target);
if (t != JS_OBJ && t != JS_FUNC) return js_mkfalse();
js_set_slot(js, target, SLOT_EXTENSIBLE, js_mkfalse());
return js_mktrue();
}
void init_reflect_module(void) {
struct js *js = rt->js;
jsval_t reflect_obj = js_mkobj(js);
js_set(js, reflect_obj, "get", js_mkfun(reflect_get));
js_set(js, reflect_obj, "set", js_mkfun(reflect_set));
js_set(js, reflect_obj, "has", js_mkfun(reflect_has));
js_set(js, reflect_obj, "deleteProperty", js_mkfun(reflect_delete_property));
js_set(js, reflect_obj, "ownKeys", js_mkfun(reflect_own_keys));
js_set(js, reflect_obj, "construct", js_mkfun(reflect_construct));
js_set(js, reflect_obj, "apply", js_mkfun(reflect_apply));
js_set(js, reflect_obj, "getOwnPropertyDescriptor", js_mkfun(reflect_get_own_property_descriptor));
js_set(js, reflect_obj, "defineProperty", js_mkfun(reflect_define_property));
js_set(js, reflect_obj, "getPrototypeOf", js_mkfun(reflect_get_prototype_of));
js_set(js, reflect_obj, "setPrototypeOf", js_mkfun(reflect_set_prototype_of));
js_set(js, reflect_obj, "isExtensible", js_mkfun(reflect_is_extensible));
js_set(js, reflect_obj, "preventExtensions", js_mkfun(reflect_prevent_extensions));
js_set(js, reflect_obj, get_toStringTag_sym_key(), js_mkstr(js, "Reflect", 7));
js_set(js, js_glob(js), "Reflect", reflect_obj);
}

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