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/*
* Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
* Copyright (C) 2002, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public License
* along with this library; see the file COPYING.LIB. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA 02110-1301, USA.
*
*/
#ifndef Operations_h
#define Operations_h
#include "JSImmediate.h"
#include "JSNumberCell.h"
#include "JSString.h"
namespace JSC {
// ECMA 11.9.3
bool equal(ExecState*, JSValuePtr, JSValuePtr);
bool equalSlowCase(ExecState*, JSValuePtr, JSValuePtr);
ALWAYS_INLINE bool equalSlowCaseInline(ExecState* exec, JSValuePtr v1, JSValuePtr v2)
{
ASSERT(!JSImmediate::areBothImmediateNumbers(v1, v2));
do {
if (v1->isNumber() && v2->isNumber())
return v1->uncheckedGetNumber() == v2->uncheckedGetNumber();
bool s1 = v1->isString();
bool s2 = v2->isString();
if (s1 && s2)
return asString(v1)->value() == asString(v2)->value();
if (v1->isUndefinedOrNull()) {
if (v2->isUndefinedOrNull())
return true;
if (JSImmediate::isImmediate(v2))
return false;
return v2->asCell()->structure()->typeInfo().masqueradesAsUndefined();
}
if (v2->isUndefinedOrNull()) {
if (JSImmediate::isImmediate(v1))
return false;
return v1->asCell()->structure()->typeInfo().masqueradesAsUndefined();
}
if (v1->isObject()) {
if (v2->isObject())
return v1 == v2;
JSValuePtr p1 = v1->toPrimitive(exec);
if (exec->hadException())
return false;
v1 = p1;
if (JSImmediate::areBothImmediateNumbers(v1, v2))
return v1 == v2;
continue;
}
if (v2->isObject()) {
JSValuePtr p2 = v2->toPrimitive(exec);
if (exec->hadException())
return false;
v2 = p2;
if (JSImmediate::areBothImmediateNumbers(v1, v2))
return v1 == v2;
continue;
}
if (s1 || s2) {
double d1 = v1->toNumber(exec);
double d2 = v2->toNumber(exec);
return d1 == d2;
}
if (v1->isBoolean()) {
if (v2->isNumber())
return static_cast<double>(v1->getBoolean()) == v2->uncheckedGetNumber();
} else if (v2->isBoolean()) {
if (v1->isNumber())
return v1->uncheckedGetNumber() == static_cast<double>(v2->getBoolean());
}
return v1 == v2;
} while (true);
}
bool strictEqual(JSValuePtr, JSValuePtr);
bool strictEqualSlowCase(JSValuePtr, JSValuePtr);
inline bool strictEqualSlowCaseInline(JSValuePtr v1, JSValuePtr v2)
{
ASSERT(!JSImmediate::areBothImmediate(v1, v2));
if (JSImmediate::isEitherImmediate(v1, v2)) {
ASSERT(v1 == JSImmediate::zeroImmediate() || v2 == JSImmediate::zeroImmediate());
ASSERT(v1 != v2);
// The reason we can't just return false here is that 0 === -0,
// and while the former is an immediate number, the latter is not.
if (v1 == JSImmediate::zeroImmediate())
return asCell(v2)->isNumber() && asNumberCell(v2)->value() == 0;
return asCell(v1)->isNumber() && asNumberCell(v1)->value() == 0;
}
if (asCell(v1)->isNumber()) {
return asCell(v2)->isNumber()
&& asNumberCell(v1)->value() == asNumberCell(v2)->value();
}
if (asCell(v1)->isString()) {
return asCell(v2)->isString()
&& asString(v1)->value() == asString(v2)->value();
}
return v1 == v2;
}
JSValuePtr throwOutOfMemoryError(ExecState*);
}
#endif
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