cosmopolitan/third_party/quickjs/reflect.c

/*
 * QuickJS Javascript Engine
 *
 * Copyright (c) 2017-2021 Fabrice Bellard
 * Copyright (c) 2017-2021 Charlie Gordon
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */
#include "third_party/quickjs/internal.h"

asm(".ident\t\"\\n\\n\
QuickJS (MIT License)\\n\
Copyright (c) 2017-2021 Fabrice Bellard\\n\
Copyright (c) 2017-2021 Charlie Gordon\"");
asm(".include \"libc/disclaimer.inc\"");
/* clang-format off */

static JSValue js_reflect_apply(JSContext *ctx, JSValueConst this_val,
                                int argc, JSValueConst *argv)
{
    return js_function_apply(ctx, argv[0], max_int(0, argc - 1), argv + 1, 2);
}

static JSValue js_reflect_construct(JSContext *ctx, JSValueConst this_val,
                                    int argc, JSValueConst *argv)
{
    JSValueConst func, array_arg, new_target;
    JSValue *tab, ret;
    uint32_t len;
    func = argv[0];
    array_arg = argv[1];
    if (argc > 2) {
        new_target = argv[2];
        if (!JS_IsConstructor(ctx, new_target))
            return JS_ThrowTypeError(ctx, "not a constructor");
    } else {
        new_target = func;
    }
    tab = build_arg_list(ctx, &len, array_arg);
    if (!tab)
        return JS_EXCEPTION;
    ret = JS_CallConstructor2(ctx, func, new_target, len, (JSValueConst *)tab);
    free_arg_list(ctx, tab, len);
    return ret;
}

static JSValue js_reflect_deleteProperty(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    JSValueConst obj;
    JSAtom atom;
    int ret;
    obj = argv[0];
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    atom = JS_ValueToAtom(ctx, argv[1]);
    if (UNLIKELY(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    ret = JS_DeleteProperty(ctx, obj, atom, 0);
    JS_FreeAtom(ctx, atom);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_reflect_get(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    JSValueConst obj, prop, receiver;
    JSAtom atom;
    JSValue ret;
    obj = argv[0];
    prop = argv[1];
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    if (argc > 2)
        receiver = argv[2];
    else
        receiver = obj;
    atom = JS_ValueToAtom(ctx, prop);
    if (UNLIKELY(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    ret = JS_GetPropertyInternal(ctx, obj, atom, receiver, FALSE);
    JS_FreeAtom(ctx, atom);
    return ret;
}

static JSValue js_reflect_has(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    JSValueConst obj, prop;
    JSAtom atom;
    int ret;
    obj = argv[0];
    prop = argv[1];
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    atom = JS_ValueToAtom(ctx, prop);
    if (UNLIKELY(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    ret = JS_HasProperty(ctx, obj, atom);
    JS_FreeAtom(ctx, atom);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_reflect_set(JSContext *ctx, JSValueConst this_val,
                              int argc, JSValueConst *argv)
{
    JSValueConst obj, prop, val, receiver;
    int ret;
    JSAtom atom;
    obj = argv[0];
    prop = argv[1];
    val = argv[2];
    if (argc > 3)
        receiver = argv[3];
    else
        receiver = obj;
    if (JS_VALUE_GET_TAG(obj) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    atom = JS_ValueToAtom(ctx, prop);
    if (UNLIKELY(atom == JS_ATOM_NULL))
        return JS_EXCEPTION;
    ret = JS_SetPropertyGeneric(ctx, obj, atom,
                                JS_DupValue(ctx, val), receiver, 0);
    JS_FreeAtom(ctx, atom);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_reflect_setPrototypeOf(JSContext *ctx, JSValueConst this_val,
                                         int argc, JSValueConst *argv)
{
    int ret;
    ret = JS_SetPrototypeInternal(ctx, argv[0], argv[1], FALSE);
    if (ret < 0)
        return JS_EXCEPTION;
    else
        return JS_NewBool(ctx, ret);
}

static JSValue js_reflect_ownKeys(JSContext *ctx, JSValueConst this_val,
                                  int argc, JSValueConst *argv)
{
    if (JS_VALUE_GET_TAG(argv[0]) != JS_TAG_OBJECT)
        return JS_ThrowTypeErrorNotAnObject(ctx);
    return JS_GetOwnPropertyNames2(ctx, argv[0],
                                   JS_GPN_STRING_MASK | JS_GPN_SYMBOL_MASK,
                                   JS_ITERATOR_KIND_KEY);
}

static const JSCFunctionListEntry js_reflect_funcs[] = {
    JS_CFUNC_DEF("apply", 3, js_reflect_apply ),
    JS_CFUNC_DEF("construct", 2, js_reflect_construct ),
    JS_CFUNC_MAGIC_DEF("defineProperty", 3, js_object_defineProperty, 1 ),
    JS_CFUNC_DEF("deleteProperty", 2, js_reflect_deleteProperty ),
    JS_CFUNC_DEF("get", 2, js_reflect_get ),
    JS_CFUNC_MAGIC_DEF("getOwnPropertyDescriptor", 2, js_object_getOwnPropertyDescriptor, 1 ),
    JS_CFUNC_MAGIC_DEF("getPrototypeOf", 1, js_object_getPrototypeOf, 1 ),
    JS_CFUNC_DEF("has", 2, js_reflect_has ),
    JS_CFUNC_MAGIC_DEF("isExtensible", 1, js_object_isExtensible, 1 ),
    JS_CFUNC_DEF("ownKeys", 1, js_reflect_ownKeys ),
    JS_CFUNC_MAGIC_DEF("preventExtensions", 1, js_object_preventExtensions, 1 ),
    JS_CFUNC_DEF("set", 3, js_reflect_set ),
    JS_CFUNC_DEF("setPrototypeOf", 2, js_reflect_setPrototypeOf ),
    JS_PROP_STRING_DEF("[Symbol.toStringTag]", "Reflect", JS_PROP_CONFIGURABLE ),
};

static const JSCFunctionListEntry js_reflect_obj[] = {
    JS_OBJECT_DEF("Reflect", js_reflect_funcs, countof(js_reflect_funcs), JS_PROP_WRITABLE | JS_PROP_CONFIGURABLE ),
};

void JS_AddIntrinsicReflect(JSContext *ctx) {
    JS_SetPropertyFunctionList(ctx, ctx->global_obj, js_reflect_obj, countof(js_reflect_obj));
}