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1 /* |
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2 * This file is part of the KDE libraries |
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3 * Copyright (C) 1999-2001 Harri Porten (porten@kde.org) |
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4 * Copyright (C) 2001 Peter Kelly (pmk@post.com) |
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5 * Copyright (C) 2003 Apple Computer, Inc. |
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6 * |
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7 * This library is free software; you can redistribute it and/or |
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8 * modify it under the terms of the GNU Library General Public |
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9 * License as published by the Free Software Foundation; either |
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10 * version 2 of the License, or (at your option) any later version. |
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11 * |
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12 * This library is distributed in the hope that it will be useful, |
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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15 * Library General Public License for more details. |
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16 * |
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17 * You should have received a copy of the GNU Library General Public License |
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18 * along with this library; see the file COPYING.LIB. If not, write to |
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19 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
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20 * Boston, MA 02110-1301, USA. |
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21 * |
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22 */ |
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23 |
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24 #include "config.h" |
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25 #include "value.h" |
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26 |
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27 #include "error_object.h" |
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28 #include "nodes.h" |
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29 #include "operations.h" |
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30 #include <stdio.h> |
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31 #include <string.h> |
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32 #include <wtf/MathExtras.h> |
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33 |
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34 namespace KJS { |
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35 |
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36 static const double D16 = 65536.0; |
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37 static const double D32 = 4294967296.0; |
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38 |
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39 EXPORT |
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40 void *JSCell::operator new(size_t size) |
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41 { |
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42 return Collector::allocate(size); |
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43 } |
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44 |
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45 EXPORT |
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46 bool JSCell::getUInt32(unsigned&) const |
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47 { |
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48 return false; |
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49 } |
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50 |
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51 // ECMA 9.4 |
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52 double JSValue::toInteger(ExecState *exec) const |
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53 { |
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54 uint32_t i; |
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55 if (getUInt32(i)) |
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56 return i; |
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57 return roundValue(exec, const_cast<JSValue*>(this)); |
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58 } |
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59 |
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60 EXPORT |
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61 int32_t JSValue::toInt32(ExecState* exec) const |
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62 { |
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63 bool ok; |
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64 return toInt32(exec, ok); |
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65 } |
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66 |
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67 EXPORT |
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68 int32_t JSValue::toInt32(ExecState* exec, bool& ok) const |
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69 { |
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70 ok = true; |
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71 |
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72 uint32_t i; |
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73 if (getUInt32(i)) |
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74 return i; |
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75 |
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76 double d = roundValue(exec, const_cast<JSValue*>(this)); |
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77 if (isNaN(d) || isInf(d)) { |
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78 ok = false; |
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79 return 0; |
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80 } |
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81 double d32 = fmod(d, D32); |
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82 |
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83 if (d32 >= D32 / 2) |
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84 d32 -= D32; |
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85 else if (d32 < -D32 / 2) |
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86 d32 += D32; |
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87 |
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88 return static_cast<int32_t>(d32); |
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89 } |
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90 |
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91 EXPORT |
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92 uint32_t JSValue::toUInt32(ExecState* exec) const |
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93 { |
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94 bool ok; |
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95 return toUInt32(exec, ok); |
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96 } |
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97 |
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98 EXPORT |
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99 uint32_t JSValue::toUInt32(ExecState* exec, bool& ok) const |
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100 { |
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101 ok = true; |
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102 |
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103 uint32_t i; |
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104 if (getUInt32(i)) |
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105 return i; |
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106 |
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107 double d = roundValue(exec, const_cast<JSValue*>(this)); |
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108 if (isNaN(d) || isInf(d)) { |
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109 ok = false; |
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110 return 0; |
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111 } |
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112 double d32 = fmod(d, D32); |
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113 |
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114 if (d32 < 0) |
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115 d32 += D32; |
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116 |
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117 return static_cast<uint32_t>(d32); |
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118 } |
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119 |
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120 uint16_t JSValue::toUInt16(ExecState *exec) const |
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121 { |
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122 uint32_t i; |
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123 if (getUInt32(i)) |
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124 return static_cast<uint16_t>(i); |
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125 |
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126 double d = roundValue(exec, const_cast<JSValue*>(this)); |
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127 if (isNaN(d) || isInf(d)) |
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128 return 0; |
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129 double d16 = fmod(d, D16); |
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130 |
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131 if (d16 < 0) |
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132 d16 += D16; |
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133 |
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134 return static_cast<uint16_t>(d16); |
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135 } |
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136 |
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137 EXPORT |
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138 float JSValue::toFloat(ExecState* exec) const |
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139 { |
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140 return static_cast<float>(toNumber(exec)); |
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141 } |
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142 |
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143 bool JSCell::getNumber(double &numericValue) const |
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144 { |
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145 if (!isNumber()) |
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146 return false; |
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147 numericValue = static_cast<const NumberImp *>(this)->value(); |
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148 return true; |
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149 } |
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150 |
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151 EXPORT |
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152 double JSCell::getNumber() const |
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153 { |
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154 return isNumber() ? static_cast<const NumberImp *>(this)->value() : NaN; |
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155 } |
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156 |
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157 EXPORT |
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158 bool JSCell::getString(UString &stringValue) const |
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159 { |
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160 if (!isString()) |
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161 return false; |
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162 stringValue = static_cast<const StringImp *>(this)->value(); |
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163 return true; |
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164 } |
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165 |
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166 UString JSCell::getString() const |
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167 { |
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168 return isString() ? static_cast<const StringImp *>(this)->value() : UString(); |
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169 } |
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170 |
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171 EXPORT |
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172 JSObject *JSCell::getObject() |
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173 { |
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174 return isObject() ? static_cast<JSObject *>(this) : 0; |
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175 } |
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176 |
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177 const JSObject *JSCell::getObject() const |
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178 { |
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179 return isObject() ? static_cast<const JSObject *>(this) : 0; |
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180 } |
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181 |
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182 EXPORT |
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183 JSCell* jsString(const char* s) |
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184 { |
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185 return new StringImp(s ? s : ""); |
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186 } |
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187 |
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188 EXPORT |
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189 JSCell* jsString(const UString& s) |
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190 { |
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191 return s.isNull() ? new StringImp("") : new StringImp(s); |
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192 } |
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193 |
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194 EXPORT |
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195 JSCell* jsOwnedString(const UString& s) |
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196 { |
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197 return s.isNull() ? new StringImp("", StringImp::HasOtherOwner) : new StringImp(s, StringImp::HasOtherOwner); |
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198 } |
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199 |
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200 // This method includes a PIC branch to set up the NumberImp's vtable, so we quarantine |
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201 // it in a separate function to keep the normal case speedy. |
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202 EXPORT |
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203 JSValue *jsNumberCell(double d) |
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204 { |
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205 return new NumberImp(d); |
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206 } |
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207 |
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208 } // namespace KJS |