| 1 | /*
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| 2 | * Copyright (C) 1999-2000 Harri Porten ([email protected])
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| 3 | * Copyright (C) 2008 Apple Inc. All Rights Reserved.
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| 4 | *
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| 5 | * This library is free software; you can redistribute it and/or
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| 6 | * modify it under the terms of the GNU Library General Public
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| 7 | * License as published by the Free Software Foundation; either
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| 8 | * version 2 of the License, or (at your option) any later version.
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| 9 | *
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| 10 | * This library is distributed in the hope that it will be useful,
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| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 13 | * Library General Public License for more details.
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| 14 | *
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| 15 | * You should have received a copy of the GNU Library General Public License
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| 16 | * along with this library; see the file COPYING.LIB. If not, write to
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| 17 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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| 18 | * Boston, MA 02110-1301, USA.
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| 19 | *
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| 20 | */
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| 21 |
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| 22 | #include "config.h"
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| 23 | #include "operations.h"
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| 24 |
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| 25 | #include "Error.h"
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| 26 | #include "JSObject.h"
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| 27 | #include "JSString.h"
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| 28 | #include <math.h>
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| 29 | #include <stdio.h>
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| 30 | #include <wtf/MathExtras.h>
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| 31 |
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| 32 | #if HAVE(FLOAT_H)
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| 33 | #include <float.h>
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| 34 | #endif
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| 35 |
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| 36 | namespace KJS {
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| 37 |
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| 38 | // ECMA 11.9.3
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| 39 | bool equal(ExecState* exec, JSValue* v1, JSValue* v2)
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| 40 | {
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| 41 | startOver:
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| 42 | if (JSImmediate::areBothImmediateNumbers(v1, v2))
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| 43 | return v1 == v2;
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| 44 |
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| 45 | if (v1->isNumber() && v2->isNumber())
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| 46 | return v1->uncheckedGetNumber() == v2->uncheckedGetNumber();
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| 47 |
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| 48 | bool s1 = v1->isString();
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| 49 | bool s2 = v2->isString();
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| 50 | if (s1 && s2)
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| 51 | return static_cast<JSString*>(v1)->value() == static_cast<JSString*>(v2)->value();
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| 52 |
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| 53 | if (v1->isUndefinedOrNull()) {
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| 54 | if (v2->isUndefinedOrNull())
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| 55 | return true;
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| 56 | if (!v2->isObject())
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| 57 | return false;
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| 58 | return static_cast<JSObject*>(v2)->masqueradeAsUndefined();
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| 59 | }
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| 60 |
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| 61 | if (v2->isUndefinedOrNull()) {
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| 62 | if (!v1->isObject())
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| 63 | return false;
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| 64 | return static_cast<JSObject*>(v1)->masqueradeAsUndefined();
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| 65 | }
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| 66 |
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| 67 | if (v1->isObject()) {
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| 68 | if (v2->isObject())
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| 69 | return v1 == v2;
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| 70 | JSValue* p1 = v1->toPrimitive(exec);
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| 71 | if (exec->hadException())
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| 72 | return false;
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| 73 | v1 = p1;
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| 74 | goto startOver;
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| 75 | }
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| 76 |
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| 77 | if (v2->isObject()) {
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| 78 | JSValue* p2 = v2->toPrimitive(exec);
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| 79 | if (exec->hadException())
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| 80 | return false;
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| 81 | v2 = p2;
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| 82 | goto startOver;
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| 83 | }
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| 84 |
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| 85 | if (s1 || s2) {
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| 86 | double d1 = v1->toNumber(exec);
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| 87 | double d2 = v2->toNumber(exec);
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| 88 | return d1 == d2;
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| 89 | }
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| 90 |
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| 91 | if (v1->isBoolean()) {
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| 92 | if (v2->isNumber())
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| 93 | return static_cast<double>(v1->getBoolean()) == v2->uncheckedGetNumber();
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| 94 | } else if (v2->isBoolean()) {
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| 95 | if (v1->isNumber())
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| 96 | return v1->uncheckedGetNumber() == static_cast<double>(v2->getBoolean());
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| 97 | }
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| 98 |
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| 99 | return v1 == v2;
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| 100 | }
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| 101 |
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| 102 | bool strictEqual(JSValue* v1, JSValue* v2)
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| 103 | {
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| 104 | if (JSImmediate::isEitherImmediate(v1, v2)) {
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| 105 | if (v1 == v2)
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| 106 | return true;
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| 107 |
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| 108 | // The reason we can't just return false here is that 0 === -0,
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| 109 | // and while the former is an immediate number, the latter is not.
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| 110 | if (v1 == JSImmediate::from(0))
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| 111 | return !JSImmediate::isImmediate(v2)
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| 112 | && static_cast<JSCell*>(v2)->isNumber()
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| 113 | && static_cast<JSNumberCell*>(v2)->value() == 0;
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| 114 | return v2 == JSImmediate::from(0)
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| 115 | && !JSImmediate::isImmediate(v1)
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| 116 | && static_cast<JSCell*>(v1)->isNumber()
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| 117 | && static_cast<JSNumberCell*>(v1)->value() == 0;
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| 118 | }
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| 119 |
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| 120 | if (static_cast<JSCell*>(v1)->isNumber())
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| 121 | return static_cast<JSCell*>(v2)->isNumber()
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| 122 | && static_cast<JSNumberCell*>(v1)->value() == static_cast<JSNumberCell*>(v2)->value();
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| 123 |
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| 124 | if (static_cast<JSCell*>(v1)->isString())
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| 125 | return static_cast<JSCell*>(v2)->isString()
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| 126 | && static_cast<JSString*>(v1)->value() == static_cast<JSString*>(v2)->value();
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| 127 |
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| 128 | return v1 == v2;
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| 129 | }
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| 130 |
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| 131 | JSValue* throwOutOfMemoryError(ExecState* exec)
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| 132 | {
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| 133 | JSObject* error = Error::create(exec, GeneralError, "Out of memory");
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| 134 | exec->setException(error);
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| 135 | return error;
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| 136 | }
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| 137 |
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| 138 | } // namespace KJS
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