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 throwOutOfMemoryError(ExecState* exec)
  45 {
  46     JSObject* error = Error::create(exec, GeneralError, "Out of memory");
  47     exec->setException(error);
  48     return error;
  49 }
  50
  51 NEVER_INLINE JSValue jsAddSlowCase(CallFrame* callFrame, JSValue v1, JSValue v2)
  52 {
  53     // exception for the Date exception in defaultValue()
  54     JSValue p1 = v1.toPrimitive(callFrame);
  55     JSValue p2 = v2.toPrimitive(callFrame);
  56
  57     if (p1.isString()) {
  58         return p2.isString()
  59             ? jsString(callFrame, asString(p1), asString(p2))
  60             : jsString(callFrame, asString(p1), p2.toString(callFrame));
  61     }
  62     if (p2.isString())
  63         return jsString(callFrame, p1.toString(callFrame), asString(p2));
  64
  65     return jsNumber(callFrame, p1.toNumber(callFrame) + p2.toNumber(callFrame));
  66 }
  67
  68 JSValue jsTypeStringForValue(CallFrame* callFrame, JSValue v)
  69 {
  70     if (v.isUndefined())
  71         return jsNontrivialString(callFrame, "undefined");
  72     if (v.isBoolean())
  73         return jsNontrivialString(callFrame, "boolean");
  74     if (v.isNumber())
  75         return jsNontrivialString(callFrame, "number");
  76     if (v.isString())
  77         return jsNontrivialString(callFrame, "string");
  78     if (v.isObject()) {
  79         // Return "undefined" for objects that should be treated
  80         // as null when doing comparisons.
  81         if (asObject(v)->structure()->typeInfo().masqueradesAsUndefined())
  82             return jsNontrivialString(callFrame, "undefined");
  83         CallData callData;
  84         if (asObject(v)->getCallData(callData) != CallTypeNone)
  85             return jsNontrivialString(callFrame, "function");
  86     }
  87     return jsNontrivialString(callFrame, "object");
  88 }
  89
  90 bool jsIsObjectType(JSValue v)
  91 {
  92     if (!v.isCell())
  93         return v.isNull();
  94
  95     JSType type = asCell(v)->structure()->typeInfo().type();
  96     if (type == NumberType || type == StringType)
  97         return false;
  98     if (type == ObjectType) {
  99         if (asObject(v)->structure()->typeInfo().masqueradesAsUndefined())
 100             return false;
 101         CallData callData;
 102         if (asObject(v)->getCallData(callData) != CallTypeNone)
 103             return false;
 104     }
 105     return true;
 106 }
 107
 108 bool jsIsFunctionType(JSValue v)
 109 {
 110     if (v.isObject()) {
 111         CallData callData;
 112         if (asObject(v)->getCallData(callData) != CallTypeNone)
 113             return true;
 114     }
 115     return false;
 116 }
 117
 118 } // namespace JSC