runtime/Operations.cpp

   1 /*
   2  * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)
   3  * Copyright (C) 2008 Apple Inc. All Rights Reserved.
   4  *
   5  *  This library is free software; you can redistribute it and/or
   6  *  modify it under the terms of the GNU Library General Public
   7  *  License as published by the Free Software Foundation; either
   8  *  version 2 of the License, or (at your option) any later version.
   9  *
  10  *  This library is distributed in the hope that it will be useful,
  11  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  *  Library General Public License for more details.
  14  *
  15  *  You should have received a copy of the GNU Library General Public License
  16  *  along with this library; see the file COPYING.LIB.  If not, write to
  17  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  18  *  Boston, MA 02110-1301, USA.
  19  *
  20  */
  21
  22 #include "config.h"
  23 #include "Operations.h"
  24
  25 #include "Error.h"
  26 #include "JSObject.h"
  27 #include "JSString.h"
  28 #include <math.h>
  29 #include <stdio.h>
  30 #include <wtf/MathExtras.h>
  31
  32 namespace JSC {
  33
  34 bool JSValue::equalSlowCase(ExecState* exec, JSValue v1, JSValue v2)
  35 {
  36     return equalSlowCaseInline(exec, v1, v2);
  37 }
  38
  39 bool JSValue::strictEqualSlowCase(ExecState* exec, JSValue v1, JSValue v2)
  40 {
  41     return strictEqualSlowCaseInline(exec, v1, v2);
  42 }
  43
  44 NEVER_INLINE JSValue jsAddSlowCase(CallFrame* callFrame, JSValue v1, JSValue v2)
  45 {
  46     // exception for the Date exception in defaultValue()
  47     JSValue p1 = v1.toPrimitive(callFrame);
  48     JSValue p2 = v2.toPrimitive(callFrame);
  49
  50     if (p1.isString())
  51         return jsString(callFrame, asString(p1), p2.toString(callFrame));
  52
  53     if (p2.isString())
  54         return jsString(callFrame, p1.toString(callFrame), asString(p2));
  55
  56     return jsNumber(p1.toNumber(callFrame) + p2.toNumber(callFrame));
  57 }
  58
  59 JSValue jsTypeStringForValue(CallFrame* callFrame, JSValue v)
  60 {
  61     JSGlobalData& globalData = callFrame->globalData();
  62     if (v.isUndefined())
  63         return globalData.smallStrings.undefinedString(&globalData);
  64     if (v.isBoolean())
  65         return globalData.smallStrings.booleanString(&globalData);
  66     if (v.isNumber())
  67         return globalData.smallStrings.numberString(&globalData);
  68     if (v.isString())
  69         return globalData.smallStrings.stringString(&globalData);
  70     if (v.isObject()) {
  71         // Return "undefined" for objects that should be treated
  72         // as null when doing comparisons.
  73         if (asObject(v)->structure()->typeInfo().masqueradesAsUndefined())
  74             return globalData.smallStrings.undefinedString(&globalData);
  75         CallData callData;
  76         JSObject* object = asObject(v);
  77         if (object->methodTable()->getCallData(object, callData) != CallTypeNone)
  78             return globalData.smallStrings.functionString(&globalData);
  79     }
  80     return globalData.smallStrings.objectString(&globalData);
  81 }
  82
  83 bool jsIsObjectType(JSValue v)
  84 {
  85     if (!v.isCell())
  86         return v.isNull();
  87
  88     JSType type = v.asCell()->structure()->typeInfo().type();
  89     if (type == NumberType || type == StringType)
  90         return false;
  91     if (type >= ObjectType) {
  92         if (asObject(v)->structure()->typeInfo().masqueradesAsUndefined())
  93             return false;
  94         CallData callData;
  95         JSObject* object = asObject(v);
  96         if (object->methodTable()->getCallData(object, callData) != CallTypeNone)
  97             return false;
  98     }
  99     return true;
 100 }
 101
 102 bool jsIsFunctionType(JSValue v)
 103 {
 104     if (v.isObject()) {
 105         CallData callData;
 106         JSObject* object = asObject(v);
 107         if (object->methodTable()->getCallData(object, callData) != CallTypeNone)
 108             return true;
 109     }
 110     return false;
 111 }
 112
 113 } // namespace JSC