runtime/JSNumberCell.cpp

   1 /*
   2  *  Copyright (C) 1999-2002 Harri Porten (porten@kde.org)
   3  *  Copyright (C) 2001 Peter Kelly (pmk@post.com)
   4  *  Copyright (C) 2004, 2007, 2008 Apple Inc. All rights reserved.
   5  *
   6  *  This library is free software; you can redistribute it and/or
   7  *  modify it under the terms of the GNU Library General Public
   8  *  License as published by the Free Software Foundation; either
   9  *  version 2 of the License, or (at your option) any later version.
  10  *
  11  *  This library is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  *  Library General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU Library General Public License
  17  *  along with this library; see the file COPYING.LIB.  If not, write to
  18  *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  *  Boston, MA 02110-1301, USA.
  20  *
  21  */
  22
  23 #include "config.h"
  24 #include "JSNumberCell.h"
  25
  26 #include "NumberObject.h"
  27 #include "UString.h"
  28
  29 namespace JSC {
  30
  31 #if !USE(ALTERNATE_JSIMMEDIATE)
  32
  33 JSValuePtr JSNumberCell::toPrimitive(ExecState*, PreferredPrimitiveType) const
  34 {
  35     return const_cast<JSNumberCell*>(this);
  36 }
  37
  38 bool JSNumberCell::getPrimitiveNumber(ExecState*, double& number, JSValuePtr& value)
  39 {
  40     number = m_value;
  41     value = this;
  42     return true;
  43 }
  44
  45 bool JSNumberCell::toBoolean(ExecState*) const
  46 {
  47     return m_value < 0.0 || m_value > 0.0; // false for NaN
  48 }
  49
  50 double JSNumberCell::toNumber(ExecState*) const
  51 {
  52   return m_value;
  53 }
  54
  55 UString JSNumberCell::toString(ExecState*) const
  56 {
  57     if (m_value == 0.0) // +0.0 or -0.0
  58         return "0";
  59     return UString::from(m_value);
  60 }
  61
  62 UString JSNumberCell::toThisString(ExecState*) const
  63 {
  64     if (m_value == 0.0) // +0.0 or -0.0
  65         return "0";
  66     return UString::from(m_value);
  67 }
  68
  69 JSObject* JSNumberCell::toObject(ExecState* exec) const
  70 {
  71     return constructNumber(exec, const_cast<JSNumberCell*>(this));
  72 }
  73
  74 JSObject* JSNumberCell::toThisObject(ExecState* exec) const
  75 {
  76     return constructNumber(exec, const_cast<JSNumberCell*>(this));
  77 }
  78
  79 bool JSNumberCell::getUInt32(uint32_t& uint32) const
  80 {
  81     uint32 = static_cast<uint32_t>(m_value);
  82     return uint32 == m_value;
  83 }
  84
  85 bool JSNumberCell::getTruncatedInt32(int32_t& int32) const
  86 {
  87     if (!(m_value >= -2147483648.0 && m_value < 2147483648.0))
  88         return false;
  89     int32 = static_cast<int32_t>(m_value);
  90     return true;
  91 }
  92
  93 bool JSNumberCell::getTruncatedUInt32(uint32_t& uint32) const
  94 {
  95     if (!(m_value >= 0.0 && m_value < 4294967296.0))
  96         return false;
  97     uint32 = static_cast<uint32_t>(m_value);
  98     return true;
  99 }
 100
 101 JSValuePtr JSNumberCell::getJSNumber()
 102 {
 103     return this;
 104 }
 105
 106 JSValuePtr jsNumberCell(ExecState* exec, double d)
 107 {
 108     return new (exec) JSNumberCell(exec, d);
 109 }
 110
 111 JSValuePtr jsNumberCell(JSGlobalData* globalData, double d)
 112 {
 113     return new (globalData) JSNumberCell(globalData, d);
 114 }
 115
 116 #else
 117
 118 JSValuePtr jsNumberCell(ExecState*, double)
 119 {
 120     ASSERT_NOT_REACHED();
 121     return noValue();
 122 }
 123
 124 #endif
 125
 126 } // namespace JSC