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<div class="title">number_object.cpp</div> </div>
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<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// -*- c-basic-offset: 2 -*-</span>
<a name="l00002"></a>00002 <span class="comment">/*</span>
<a name="l00003"></a>00003 <span class="comment"> * This file is part of the KDE libraries</span>
<a name="l00004"></a>00004 <span class="comment"> * Copyright (C) 1999-2000 Harri Porten (porten@kde.org)</span>
<a name="l00005"></a>00005 <span class="comment"> * Copyright (C) 2003 Peter Kelly (pmk@post.com)</span>
<a name="l00006"></a>00006 <span class="comment"> *</span>
<a name="l00007"></a>00007 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
<a name="l00008"></a>00008 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00009"></a>00009 <span class="comment"> * License as published by the Free Software Foundation; either</span>
<a name="l00010"></a>00010 <span class="comment"> * version 2 of the License, or (at your option) any later version.</span>
<a name="l00011"></a>00011 <span class="comment"> *</span>
<a name="l00012"></a>00012 <span class="comment"> * This library is distributed in the hope that it will be useful,</span>
<a name="l00013"></a>00013 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00014"></a>00014 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00015"></a>00015 <span class="comment"> * Lesser General Public License for more details.</span>
<a name="l00016"></a>00016 <span class="comment"> *</span>
<a name="l00017"></a>00017 <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span>
<a name="l00018"></a>00018 <span class="comment"> * License along with this library; if not, write to the Free Software</span>
<a name="l00019"></a>00019 <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00020"></a>00020 <span class="comment"> *</span>
<a name="l00021"></a>00021 <span class="comment"> */</span>
<a name="l00022"></a>00022
<a name="l00023"></a>00023 <span class="preprocessor">#include "value.h"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "object.h"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "types.h"</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include "interpreter.h"</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include "operations.h"</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include "number_object.h"</span>
<a name="l00029"></a>00029 <span class="preprocessor">#include "error_object.h"</span>
<a name="l00030"></a>00030 <span class="preprocessor">#include "dtoa.h"</span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="preprocessor">#include "number_object.lut.h"</span>
<a name="l00033"></a>00033
<a name="l00034"></a>00034 <span class="preprocessor">#include <assert.h></span>
<a name="l00035"></a>00035 <span class="preprocessor">#include <math.h></span>
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="keyword">using namespace </span>KJS;
<a name="l00038"></a>00038
<a name="l00039"></a>00039 <span class="comment">// ------------------------------ NumberInstanceImp ----------------------------</span>
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="keyword">const</span> <a class="code" href="structKJS_1_1ClassInfo.html" title="Class Information.">ClassInfo</a> NumberInstanceImp::info = {<span class="stringliteral">"Number"</span>, 0, 0, 0};
<a name="l00042"></a>00042
<a name="l00043"></a>00043 NumberInstanceImp::NumberInstanceImp(ObjectImp *proto)
<a name="l00044"></a>00044 : ObjectImp(proto)
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046 }
<a name="l00047"></a>00047 <span class="comment">// ------------------------------ NumberPrototypeImp ---------------------------</span>
<a name="l00048"></a>00048
<a name="l00049"></a>00049 <span class="comment">// ECMA 15.7.4</span>
<a name="l00050"></a>00050
<a name="l00051"></a>00051 NumberPrototypeImp::NumberPrototypeImp(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> *exec,
<a name="l00052"></a>00052 ObjectPrototypeImp *objProto,
<a name="l00053"></a>00053 <a class="code" href="classKJS_1_1FunctionPrototypeImp.html" title="The initial value of Function.prototype (and thus all objects created with the Function constructor)...">FunctionPrototypeImp</a> *funcProto)
<a name="l00054"></a>00054 : NumberInstanceImp(objProto)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> protect(<span class="keyword">this</span>);
<a name="l00057"></a>00057 setInternalValue(NumberImp::zero());
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="comment">// The constructor will be added later, after NumberObjectImp has been constructed</span>
<a name="l00060"></a>00060
<a name="l00061"></a>00061 putDirect(toStringPropertyName,<span class="keyword">new</span> NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToString,
<a name="l00062"></a>00062 1,toStringPropertyName),DontEnum);
<a name="l00063"></a>00063 putDirect(toLocaleStringPropertyName,<span class="keyword">new</span> NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToLocaleString,
<a name="l00064"></a>00064 0,toLocaleStringPropertyName),DontEnum);
<a name="l00065"></a>00065 putDirect(valueOfPropertyName,<span class="keyword">new</span> NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ValueOf,
<a name="l00066"></a>00066 0,valueOfPropertyName),DontEnum);
<a name="l00067"></a>00067 putDirect(<span class="stringliteral">"toFixed"</span>, <span class="keyword">new</span> NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToFixed,
<a name="l00068"></a>00068 1,<span class="stringliteral">"toFixed"</span>),DontEnum);
<a name="l00069"></a>00069 putDirect(<span class="stringliteral">"toExponential"</span>,<span class="keyword">new</span> NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToExponential,
<a name="l00070"></a>00070 1,<span class="stringliteral">"toExponential"</span>),DontEnum);
<a name="l00071"></a>00071 putDirect(<span class="stringliteral">"toPrecision"</span>,<span class="keyword">new</span> NumberProtoFuncImp(exec,funcProto,NumberProtoFuncImp::ToPrecision,
<a name="l00072"></a>00072 1,<span class="stringliteral">"toPrecision"</span>),DontEnum);
<a name="l00073"></a>00073 }
<a name="l00074"></a>00074
<a name="l00075"></a>00075
<a name="l00076"></a>00076 <span class="comment">// ------------------------------ NumberProtoFuncImp ---------------------------</span>
<a name="l00077"></a>00077
<a name="l00078"></a>00078 NumberProtoFuncImp::NumberProtoFuncImp(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> * <span class="comment">/*exec*/</span>, <a class="code" href="classKJS_1_1FunctionPrototypeImp.html" title="The initial value of Function.prototype (and thus all objects created with the Function constructor)...">FunctionPrototypeImp</a> *funcProto,
<a name="l00079"></a>00079 <span class="keywordtype">int</span> i, <span class="keywordtype">int</span> len, <span class="keyword">const</span> <a class="code" href="classKJS_1_1Identifier.html" title="Represents an Identifier for a Javascript object.">Identifier</a> &_ident)
<a name="l00080"></a>00080 : <a class="code" href="classKJS_1_1InternalFunctionImp.html" title="Base class for all function objects.">InternalFunctionImp</a>(funcProto), id(i)
<a name="l00081"></a>00081 {
<a name="l00082"></a>00082 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> protect(<span class="keyword">this</span>);
<a name="l00083"></a>00083 putDirect(lengthPropertyName, len, DontDelete|ReadOnly|DontEnum);
<a name="l00084"></a>00084 ident = _ident;
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086
<a name="l00087"></a>00087
<a name="l00088"></a>00088 <span class="keywordtype">bool</span> NumberProtoFuncImp::implementsCall()<span class="keyword"> const</span>
<a name="l00089"></a>00089 <span class="keyword"></span>{
<a name="l00090"></a>00090 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="keyword">static</span> <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> integer_part_noexp(<span class="keywordtype">double</span> d)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095 <span class="keywordtype">int</span> decimalPoint;
<a name="l00096"></a>00096 <span class="keywordtype">int</span> signDummy;
<a name="l00097"></a>00097 <span class="keywordtype">char</span> *result = kjs_dtoa(d, 0, 0, &decimalPoint, &signDummy, NULL);
<a name="l00098"></a>00098 <span class="keywordtype">int</span> length = strlen(result);
<a name="l00099"></a>00099
<a name="l00100"></a>00100 <span class="comment">// sign for non-zero, negative numbers</span>
<a name="l00101"></a>00101 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> str = d < 0 ? <span class="stringliteral">"-"</span> : <span class="stringliteral">""</span>;
<a name="l00102"></a>00102 <span class="keywordflow">if</span> (decimalPoint == 9999) {
<a name="l00103"></a>00103 str += <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(result);
<a name="l00104"></a>00104 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (decimalPoint <= 0) {
<a name="l00105"></a>00105 str += <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(<span class="stringliteral">"0"</span>);
<a name="l00106"></a>00106 } <span class="keywordflow">else</span> {
<a name="l00107"></a>00107 <span class="keywordtype">char</span> *buf;
<a name="l00108"></a>00108
<a name="l00109"></a>00109 <span class="keywordflow">if</span> (length <= decimalPoint) {
<a name="l00110"></a>00110 buf = (<span class="keywordtype">char</span>*)malloc(decimalPoint+1);
<a name="l00111"></a>00111 strcpy(buf,result);
<a name="l00112"></a>00112 memset(buf+length,<span class="charliteral">'0'</span>,decimalPoint-length);
<a name="l00113"></a>00113 } <span class="keywordflow">else</span> {
<a name="l00114"></a>00114 buf = (<span class="keywordtype">char</span>*)malloc(decimalPoint+1);
<a name="l00115"></a>00115 strncpy(buf,result,decimalPoint);
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a>00118 buf[decimalPoint] = <span class="charliteral">'\0'</span>;
<a name="l00119"></a>00119 str += <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(buf);
<a name="l00120"></a>00120 free(buf);
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a>00123 kjs_freedtoa(result);
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="keywordflow">return</span> str;
<a name="l00126"></a>00126 }
<a name="l00127"></a>00127
<a name="l00128"></a>00128 <span class="keyword">static</span> <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> char_sequence(<span class="keywordtype">char</span> c, <span class="keywordtype">int</span> count)
<a name="l00129"></a>00129 {
<a name="l00130"></a>00130 <span class="keywordtype">char</span> *buf = (<span class="keywordtype">char</span>*)malloc(count+1);
<a name="l00131"></a>00131 memset(buf,c,count);
<a name="l00132"></a>00132 buf[count] = <span class="charliteral">'\0'</span>;
<a name="l00133"></a>00133 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> s(buf);
<a name="l00134"></a>00134 free(buf);
<a name="l00135"></a>00135 <span class="keywordflow">return</span> s;
<a name="l00136"></a>00136 }
<a name="l00137"></a>00137
<a name="l00138"></a>00138 <span class="comment">// ECMA 15.7.4.2 - 15.7.4.7</span>
<a name="l00139"></a>00139 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> NumberProtoFuncImp::call(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> *exec, <a class="code" href="classKJS_1_1Object.html" title="Represents an Object.">Object</a> &thisObj, <span class="keyword">const</span> <a class="code" href="classKJS_1_1List.html" title="Native list type.">List</a> &args)
<a name="l00140"></a>00140 {
<a name="l00141"></a>00141 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> result;
<a name="l00142"></a>00142
<a name="l00143"></a>00143 <span class="comment">// no generic function. "this" has to be a Number object</span>
<a name="l00144"></a>00144 KJS_CHECK_THIS( NumberInstanceImp, thisObj );
<a name="l00145"></a>00145
<a name="l00146"></a>00146 <span class="comment">// execute "toString()" or "valueOf()", respectively</span>
<a name="l00147"></a>00147 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> v = thisObj.<a class="code" href="classKJS_1_1Object.html#ae57ce80e0db9939378bdf4ce7d68b4bb" title="Returns the internal value of the object.">internalValue</a>();
<a name="l00148"></a>00148 <span class="keywordflow">switch</span> (<span class="keywordtype">id</span>) {
<a name="l00149"></a>00149 <span class="keywordflow">case</span> ToString: {
<a name="l00150"></a>00150 <span class="keywordtype">int</span> radix = 10;
<a name="l00151"></a>00151 <span class="keywordflow">if</span> (!args.<a class="code" href="classKJS_1_1List.html#a6356629da9e2c8cff0e0cbe9f7f61bac">isEmpty</a>() && args[0].type() != UndefinedType)
<a name="l00152"></a>00152 radix = args[0].toInteger(exec);
<a name="l00153"></a>00153 <span class="keywordflow">if</span> (radix < 2 || radix > 36 || radix == 10)
<a name="l00154"></a>00154 result = <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(v.<a class="code" href="classKJS_1_1Value.html#a8611b80d868cebf8dd4af2f966810874" title="Performs the ToString type conversion operation on this value (ECMA 9.8)">toString</a>(exec));
<a name="l00155"></a>00155 <span class="keywordflow">else</span> {
<a name="l00156"></a>00156 <span class="keyword">const</span> <span class="keywordtype">char</span> digits[] = <span class="stringliteral">"0123456789abcdefghijklmnopqrstuvwxyz"</span>;
<a name="l00157"></a>00157 <span class="comment">// INT_MAX results in 1024 characters left of the dot with radix 2</span>
<a name="l00158"></a>00158 <span class="comment">// give the same space on the right side. safety checks are in place</span>
<a name="l00159"></a>00159 <span class="comment">// unless someone finds a precise rule.</span>
<a name="l00160"></a>00160 <span class="keywordtype">char</span> s[2048 + 3];
<a name="l00161"></a>00161 <span class="keywordtype">double</span> x = v.<a class="code" href="classKJS_1_1Value.html#abc006ad65a05568bbebe2c63604766b8" title="Performs the ToNumber type conversion operation on this value (ECMA 9.3)">toNumber</a>(exec);
<a name="l00162"></a>00162 <span class="keywordflow">if</span> (isNaN(x) || isInf(x))
<a name="l00163"></a>00163 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(<a class="code" href="classKJS_1_1UString.html#afa4fb189e0a0a6094b54516833eb0257" title="Constructs a string from an int.">UString::from</a>(x));
<a name="l00164"></a>00164 <span class="comment">// apply algorithm on absolute value. add sign later.</span>
<a name="l00165"></a>00165 <span class="keywordtype">bool</span> neg = <span class="keyword">false</span>;
<a name="l00166"></a>00166 <span class="keywordflow">if</span> (x < 0.0) {
<a name="l00167"></a>00167 neg = <span class="keyword">true</span>;
<a name="l00168"></a>00168 x = -x;
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170 <span class="comment">// convert integer portion</span>
<a name="l00171"></a>00171 <span class="keywordtype">double</span> f = floor(x);
<a name="l00172"></a>00172 <span class="keywordtype">double</span> d = f;
<a name="l00173"></a>00173 <span class="keywordtype">char</span> *dot = s + <span class="keyword">sizeof</span>(s) / 2;
<a name="l00174"></a>00174 <span class="keywordtype">char</span> *p = dot;
<a name="l00175"></a>00175 *p = <span class="charliteral">'\0'</span>;
<a name="l00176"></a>00176 <span class="keywordflow">do</span> {
<a name="l00177"></a>00177 *--p = digits[int(fmod(d, <span class="keywordtype">double</span>(radix)))];
<a name="l00178"></a>00178 d /= radix;
<a name="l00179"></a>00179 } <span class="keywordflow">while</span> ((d <= -1.0 || d >= 1.0) && p > s);
<a name="l00180"></a>00180 <span class="comment">// any decimal fraction ?</span>
<a name="l00181"></a>00181 d = x - f;
<a name="l00182"></a>00182 <span class="keyword">const</span> <span class="keywordtype">double</span> eps = 0.001; <span class="comment">// TODO: guessed. base on radix ?</span>
<a name="l00183"></a>00183 <span class="keywordflow">if</span> (d < -eps || d > eps) {
<a name="l00184"></a>00184 *dot++ = <span class="charliteral">'.'</span>;
<a name="l00185"></a>00185 <span class="keywordflow">do</span> {
<a name="l00186"></a>00186 d *= radix;
<a name="l00187"></a>00187 *dot++ = digits[int(d)];
<a name="l00188"></a>00188 d -= int(d);
<a name="l00189"></a>00189 } <span class="keywordflow">while</span> ((d < -eps || d > eps) && dot - s < <span class="keywordtype">int</span>(<span class="keyword">sizeof</span>(s)) - 1);
<a name="l00190"></a>00190 *dot = <span class="charliteral">'\0'</span>;
<a name="l00191"></a>00191 }
<a name="l00192"></a>00192 <span class="comment">// add sign if negative</span>
<a name="l00193"></a>00193 <span class="keywordflow">if</span> (neg)
<a name="l00194"></a>00194 *--p = <span class="charliteral">'-'</span>;
<a name="l00195"></a>00195 result = <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(p);
<a name="l00196"></a>00196 }
<a name="l00197"></a>00197 <span class="keywordflow">break</span>;
<a name="l00198"></a>00198 }
<a name="l00199"></a>00199 <span class="keywordflow">case</span> ToLocaleString: <span class="comment">/* TODO */</span>
<a name="l00200"></a>00200 result = <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(v.<a class="code" href="classKJS_1_1Value.html#a8611b80d868cebf8dd4af2f966810874" title="Performs the ToString type conversion operation on this value (ECMA 9.8)">toString</a>(exec));
<a name="l00201"></a>00201 <span class="keywordflow">break</span>;
<a name="l00202"></a>00202 <span class="keywordflow">case</span> ValueOf:
<a name="l00203"></a>00203 result = <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a>(v.<a class="code" href="classKJS_1_1Value.html#abc006ad65a05568bbebe2c63604766b8" title="Performs the ToNumber type conversion operation on this value (ECMA 9.3)">toNumber</a>(exec));
<a name="l00204"></a>00204 <span class="keywordflow">break</span>;
<a name="l00205"></a>00205 <span class="keywordflow">case</span> ToFixed:
<a name="l00206"></a>00206 {
<a name="l00207"></a>00207 <span class="comment">// FIXME: firefox works for all values, not just 0..20. This includes</span>
<a name="l00208"></a>00208 <span class="comment">// NaN, infinity, undefined, etc. This is just a hack to pass our regression</span>
<a name="l00209"></a>00209 <span class="comment">// suite.</span>
<a name="l00210"></a>00210 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> fractionDigits = args[0];
<a name="l00211"></a>00211 <span class="keywordtype">int</span> f = -1;
<a name="l00212"></a>00212 <span class="keywordtype">double</span> fd = fractionDigits.<a class="code" href="classKJS_1_1Value.html#abc006ad65a05568bbebe2c63604766b8" title="Performs the ToNumber type conversion operation on this value (ECMA 9.3)">toNumber</a>(exec);
<a name="l00213"></a>00213 <span class="keywordflow">if</span> (isNaN(fd)) {
<a name="l00214"></a>00214 f = 0;
<a name="l00215"></a>00215 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!isInf(fd)) {
<a name="l00216"></a>00216 f = int(fd);
<a name="l00217"></a>00217 }
<a name="l00218"></a>00218 <span class="keywordflow">if</span> (f < 0 || f > 20) {
<a name="l00219"></a>00219 <a class="code" href="classKJS_1_1Object.html" title="Represents an Object.">Object</a> err = <a class="code" href="classKJS_1_1Error.html#ad90381467b6e9fbae92c0975852048f2" title="Factory method for error objects.">Error::create</a>(exec,RangeError);
<a name="l00220"></a>00220 exec->setException(err);
<a name="l00221"></a>00221 <span class="keywordflow">return</span> err;
<a name="l00222"></a>00222 }
<a name="l00223"></a>00223
<a name="l00224"></a>00224 <span class="keywordtype">double</span> x = v.<a class="code" href="classKJS_1_1Value.html#abc006ad65a05568bbebe2c63604766b8" title="Performs the ToNumber type conversion operation on this value (ECMA 9.3)">toNumber</a>(exec);
<a name="l00225"></a>00225 <span class="keywordflow">if</span> (isNaN(x))
<a name="l00226"></a>00226 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(<span class="stringliteral">"NaN"</span>);
<a name="l00227"></a>00227
<a name="l00228"></a>00228 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> s = <span class="stringliteral">""</span>;
<a name="l00229"></a>00229 <span class="keywordflow">if</span> (x < 0) {
<a name="l00230"></a>00230 s += <span class="stringliteral">"-"</span>;
<a name="l00231"></a>00231 x = -x;
<a name="l00232"></a>00232 }
<a name="l00233"></a>00233
<a name="l00234"></a>00234 <span class="keywordflow">if</span> (x >= 1e21)
<a name="l00235"></a>00235 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(s+<a class="code" href="classKJS_1_1UString.html#afa4fb189e0a0a6094b54516833eb0257" title="Constructs a string from an int.">UString::from</a>(x));
<a name="l00236"></a>00236
<a name="l00237"></a>00237 <span class="keywordtype">double</span> n = floor(x*pow(10.0,f));
<a name="l00238"></a>00238 <span class="keywordflow">if</span> (fabs(n/pow(10.0,f)-x) > fabs((n+1)/pow(10.0,f)-x))
<a name="l00239"></a>00239 n++;
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> m = integer_part_noexp(n);
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="keywordtype">int</span> k = m.<a class="code" href="classKJS_1_1UString.html#a43b493879fd9d2d8e13039d1610cb3b9">size</a>();
<a name="l00244"></a>00244 <span class="keywordflow">if</span> (k <= f) {
<a name="l00245"></a>00245 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> z = <span class="stringliteral">""</span>;
<a name="l00246"></a>00246 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < f+1-k; i++)
<a name="l00247"></a>00247 z += <span class="stringliteral">"0"</span>;
<a name="l00248"></a>00248 m = z + m;
<a name="l00249"></a>00249 k = f + 1;
<a name="l00250"></a>00250 assert(k == m.size());
<a name="l00251"></a>00251 }
<a name="l00252"></a>00252 <span class="keywordflow">if</span> (k-f < m.size())
<a name="l00253"></a>00253 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(s+m.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>(0,k-f)+<span class="stringliteral">"."</span>+m.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>(k-f));
<a name="l00254"></a>00254 <span class="keywordflow">else</span>
<a name="l00255"></a>00255 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(s+m.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>(0,k-f));
<a name="l00256"></a>00256 }
<a name="l00257"></a>00257 <span class="keywordflow">case</span> ToExponential: {
<a name="l00258"></a>00258 <span class="keywordtype">double</span> x = v.<a class="code" href="classKJS_1_1Value.html#abc006ad65a05568bbebe2c63604766b8" title="Performs the ToNumber type conversion operation on this value (ECMA 9.3)">toNumber</a>(exec);
<a name="l00259"></a>00259
<a name="l00260"></a>00260 <span class="keywordflow">if</span> (isNaN(x) || isInf(x))
<a name="l00261"></a>00261 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(<a class="code" href="classKJS_1_1UString.html#afa4fb189e0a0a6094b54516833eb0257" title="Constructs a string from an int.">UString::from</a>(x));
<a name="l00262"></a>00262
<a name="l00263"></a>00263 <span class="keywordtype">int</span> f = 1;
<a name="l00264"></a>00264 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> fractionDigits = args[0];
<a name="l00265"></a>00265 <span class="keywordflow">if</span> (args.<a class="code" href="classKJS_1_1List.html#a69835b1e6671235343b0a17923b92c43">size</a>() > 0) {
<a name="l00266"></a>00266 f = fractionDigits.<a class="code" href="classKJS_1_1Value.html#ac08ef408068ef1a9018559079ad3022e" title="Performs the ToInteger type conversion operation on this value (ECMA 9.4)">toInteger</a>(exec);
<a name="l00267"></a>00267 <span class="keywordflow">if</span> (f < 0 || f > 20) {
<a name="l00268"></a>00268 <a class="code" href="classKJS_1_1Object.html" title="Represents an Object.">Object</a> err = <a class="code" href="classKJS_1_1Error.html#ad90381467b6e9fbae92c0975852048f2" title="Factory method for error objects.">Error::create</a>(exec,RangeError);
<a name="l00269"></a>00269 exec->setException(err);
<a name="l00270"></a>00270 <span class="keywordflow">return</span> err;
<a name="l00271"></a>00271 }
<a name="l00272"></a>00272 }
<a name="l00273"></a>00273
<a name="l00274"></a>00274 <span class="keywordtype">int</span> decimalAdjust = 0;
<a name="l00275"></a>00275 <span class="keywordflow">if</span> (!fractionDigits.<a class="code" href="classKJS_1_1Value.html#a1704785fc8140c274b0e7ec03eb0dfe2" title="Checks whether or not the value is of a particular tpye.">isA</a>(UndefinedType)) {
<a name="l00276"></a>00276 <span class="keywordtype">double</span> logx = floor(log10(fabs(x)));
<a name="l00277"></a>00277 x /= pow(10.0,logx);
<a name="l00278"></a>00278 <span class="keywordtype">double</span> fx = floor(x*pow(10.0,f))/pow(10.0,f);
<a name="l00279"></a>00279 <span class="keywordtype">double</span> cx = ceil(x*pow(10.0,f))/pow(10.0,f);
<a name="l00280"></a>00280
<a name="l00281"></a>00281 <span class="keywordflow">if</span> (fabs(fx-x) < fabs(cx-x))
<a name="l00282"></a>00282 x = fx;
<a name="l00283"></a>00283 <span class="keywordflow">else</span>
<a name="l00284"></a>00284 x = cx;
<a name="l00285"></a>00285
<a name="l00286"></a>00286 decimalAdjust = int(logx);
<a name="l00287"></a>00287 }
<a name="l00288"></a>00288
<a name="l00289"></a>00289 <span class="keywordtype">char</span> buf[80];
<a name="l00290"></a>00290 <span class="keywordtype">int</span> decimalPoint;
<a name="l00291"></a>00291 <span class="keywordtype">int</span> sign;
<a name="l00292"></a>00292
<a name="l00293"></a>00293 <span class="keywordflow">if</span> (isNaN(x))
<a name="l00294"></a>00294 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(<span class="stringliteral">"NaN"</span>);
<a name="l00295"></a>00295
<a name="l00296"></a>00296 <span class="keywordtype">char</span> *result = kjs_dtoa(x, 0, 0, &decimalPoint, &sign, NULL);
<a name="l00297"></a>00297 <span class="keywordtype">int</span> length = strlen(result);
<a name="l00298"></a>00298 decimalPoint += decimalAdjust;
<a name="l00299"></a>00299
<a name="l00300"></a>00300 <span class="keywordtype">int</span> i = 0;
<a name="l00301"></a>00301 <span class="keywordflow">if</span> (sign) {
<a name="l00302"></a>00302 buf[i++] = <span class="charliteral">'-'</span>;
<a name="l00303"></a>00303 }
<a name="l00304"></a>00304
<a name="l00305"></a>00305 <span class="keywordflow">if</span> (decimalPoint == 999) {
<a name="l00306"></a>00306 strcpy(buf + i, result);
<a name="l00307"></a>00307 } <span class="keywordflow">else</span> {
<a name="l00308"></a>00308 buf[i++] = result[0];
<a name="l00309"></a>00309
<a name="l00310"></a>00310 <span class="keywordflow">if</span> (fractionDigits.<a class="code" href="classKJS_1_1Value.html#a1704785fc8140c274b0e7ec03eb0dfe2" title="Checks whether or not the value is of a particular tpye.">isA</a>(UndefinedType))
<a name="l00311"></a>00311 f = length-1;
<a name="l00312"></a>00312
<a name="l00313"></a>00313 <span class="keywordflow">if</span> (length > 1 && f > 0) {
<a name="l00314"></a>00314 buf[i++] = <span class="charliteral">'.'</span>;
<a name="l00315"></a>00315 <span class="keywordtype">int</span> haveFDigits = length-1;
<a name="l00316"></a>00316 <span class="keywordflow">if</span> (f < haveFDigits) {
<a name="l00317"></a>00317 strncpy(buf+i,result+1, f);
<a name="l00318"></a>00318 i += f;
<a name="l00319"></a>00319 }
<a name="l00320"></a>00320 <span class="keywordflow">else</span> {
<a name="l00321"></a>00321 strcpy(buf+i,result+1);
<a name="l00322"></a>00322 i += length-1;
<a name="l00323"></a>00323 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < f-haveFDigits; j++)
<a name="l00324"></a>00324 buf[i++] = <span class="charliteral">'0'</span>;
<a name="l00325"></a>00325 }
<a name="l00326"></a>00326 }
<a name="l00327"></a>00327
<a name="l00328"></a>00328 buf[i++] = <span class="charliteral">'e'</span>;
<a name="l00329"></a>00329 buf[i++] = (decimalPoint >= 0) ? <span class="charliteral">'+'</span> : <span class="charliteral">'-'</span>;
<a name="l00330"></a>00330 <span class="comment">// decimalPoint can't be more than 3 digits decimal given the</span>
<a name="l00331"></a>00331 <span class="comment">// nature of float representation</span>
<a name="l00332"></a>00332 <span class="keywordtype">int</span> exponential = decimalPoint - 1;
<a name="l00333"></a>00333 <span class="keywordflow">if</span> (exponential < 0) {
<a name="l00334"></a>00334 exponential = exponential * -1;
<a name="l00335"></a>00335 }
<a name="l00336"></a>00336 <span class="keywordflow">if</span> (exponential >= 100) {
<a name="l00337"></a>00337 buf[i++] = <span class="charliteral">'0'</span> + exponential / 100;
<a name="l00338"></a>00338 }
<a name="l00339"></a>00339 <span class="keywordflow">if</span> (exponential >= 10) {
<a name="l00340"></a>00340 buf[i++] = <span class="charliteral">'0'</span> + (exponential % 100) / 10;
<a name="l00341"></a>00341 }
<a name="l00342"></a>00342 buf[i++] = <span class="charliteral">'0'</span> + exponential % 10;
<a name="l00343"></a>00343 buf[i++] = <span class="charliteral">'\0'</span>;
<a name="l00344"></a>00344 }
<a name="l00345"></a>00345
<a name="l00346"></a>00346 assert(i <= 80);
<a name="l00347"></a>00347
<a name="l00348"></a>00348 kjs_freedtoa(result);
<a name="l00349"></a>00349
<a name="l00350"></a>00350 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(<a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(buf));
<a name="l00351"></a>00351 }
<a name="l00352"></a>00352 <span class="keywordflow">case</span> ToPrecision:
<a name="l00353"></a>00353 {
<a name="l00354"></a>00354 <span class="keywordtype">int</span> e = 0;
<a name="l00355"></a>00355 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> m;
<a name="l00356"></a>00356
<a name="l00357"></a>00357 <span class="keywordtype">int</span> p = args[0].toInteger(exec);
<a name="l00358"></a>00358 <span class="keywordtype">double</span> x = v.<a class="code" href="classKJS_1_1Value.html#abc006ad65a05568bbebe2c63604766b8" title="Performs the ToNumber type conversion operation on this value (ECMA 9.3)">toNumber</a>(exec);
<a name="l00359"></a>00359 <span class="keywordflow">if</span> (args[0].isA(UndefinedType) || isNaN(x) || isInf(x))
<a name="l00360"></a>00360 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(v.<a class="code" href="classKJS_1_1Value.html#a8611b80d868cebf8dd4af2f966810874" title="Performs the ToString type conversion operation on this value (ECMA 9.8)">toString</a>(exec));
<a name="l00361"></a>00361
<a name="l00362"></a>00362 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> s = <span class="stringliteral">""</span>;
<a name="l00363"></a>00363 <span class="keywordflow">if</span> (x < 0) {
<a name="l00364"></a>00364 s = <span class="stringliteral">"-"</span>;
<a name="l00365"></a>00365 x = -x;
<a name="l00366"></a>00366 }
<a name="l00367"></a>00367
<a name="l00368"></a>00368 <span class="keywordflow">if</span> (p < 1 || p > 21) {
<a name="l00369"></a>00369 <a class="code" href="classKJS_1_1Object.html" title="Represents an Object.">Object</a> err = <a class="code" href="classKJS_1_1Error.html#ad90381467b6e9fbae92c0975852048f2" title="Factory method for error objects.">Error::create</a>(exec, RangeError,
<a name="l00370"></a>00370 <span class="stringliteral">"toPrecision() argument must be between 1 and 21"</span>);
<a name="l00371"></a>00371 exec->setException(err);
<a name="l00372"></a>00372 <span class="keywordflow">return</span> err;
<a name="l00373"></a>00373 }
<a name="l00374"></a>00374
<a name="l00375"></a>00375 <span class="keywordflow">if</span> (x != 0) {
<a name="l00376"></a>00376 <span class="comment">// suggestions for a better algorithm welcome!</span>
<a name="l00377"></a>00377 e = int(log10(x));
<a name="l00378"></a>00378 <span class="keywordtype">double</span> n = floor(x/pow(10.0,e-p+1));
<a name="l00379"></a>00379 <span class="keywordflow">if</span> (n < pow(10.0,p-1)) {
<a name="l00380"></a>00380 <span class="comment">// first guess was not good</span>
<a name="l00381"></a>00381 e = e - 1;
<a name="l00382"></a>00382 n = floor(x/pow(10.0,e-p+1));
<a name="l00383"></a>00383 <span class="keywordflow">if</span> (n >= pow(10.0,p)) {
<a name="l00384"></a>00384 <span class="comment">// violated constraint. try something else.</span>
<a name="l00385"></a>00385 n = pow(10.0,p-1);
<a name="l00386"></a>00386 e = int(log10(x/n)) + p - 1;
<a name="l00387"></a>00387 }
<a name="l00388"></a>00388 }
<a name="l00389"></a>00389
<a name="l00390"></a>00390 <span class="keywordflow">if</span> (fabs((n+1)*pow(10.0,e-p+1)-x) < fabs(n*pow(10.0,e-p+1)-x))
<a name="l00391"></a>00391 n++;
<a name="l00392"></a>00392 assert(pow(10.0,p-1) <= n);
<a name="l00393"></a>00393 assert(n < pow(10.0,p));
<a name="l00394"></a>00394
<a name="l00395"></a>00395 m = integer_part_noexp(n);
<a name="l00396"></a>00396 <span class="keywordflow">if</span> (e < -6 || e >= p) {
<a name="l00397"></a>00397 <span class="keywordflow">if</span> (m.<a class="code" href="classKJS_1_1UString.html#a43b493879fd9d2d8e13039d1610cb3b9">size</a>() > 1)
<a name="l00398"></a>00398 m = m.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>(0,1)+<span class="stringliteral">"."</span>+m.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>(1);
<a name="l00399"></a>00399 <span class="keywordflow">if</span> (e >= 0)
<a name="l00400"></a>00400 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(s+m+<span class="stringliteral">"e+"</span>+<a class="code" href="classKJS_1_1UString.html#afa4fb189e0a0a6094b54516833eb0257" title="Constructs a string from an int.">UString::from</a>(e));
<a name="l00401"></a>00401 <span class="keywordflow">else</span>
<a name="l00402"></a>00402 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(s+m+<span class="stringliteral">"e-"</span>+<a class="code" href="classKJS_1_1UString.html#afa4fb189e0a0a6094b54516833eb0257" title="Constructs a string from an int.">UString::from</a>(-e));
<a name="l00403"></a>00403 }
<a name="l00404"></a>00404 }
<a name="l00405"></a>00405 <span class="keywordflow">else</span> {
<a name="l00406"></a>00406 m = char_sequence(<span class="charliteral">'0'</span>,p);
<a name="l00407"></a>00407 e = 0;
<a name="l00408"></a>00408 }
<a name="l00409"></a>00409
<a name="l00410"></a>00410 <span class="keywordflow">if</span> (e == p-1) {
<a name="l00411"></a>00411 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(s+m);
<a name="l00412"></a>00412 }
<a name="l00413"></a>00413 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (e >= 0) {
<a name="l00414"></a>00414 <span class="keywordflow">if</span> (e+1 < m.<a class="code" href="classKJS_1_1UString.html#a43b493879fd9d2d8e13039d1610cb3b9">size</a>())
<a name="l00415"></a>00415 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(s+m.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>(0,e+1)+<span class="stringliteral">"."</span>+m.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>(e+1));
<a name="l00416"></a>00416 <span class="keywordflow">else</span>
<a name="l00417"></a>00417 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(s+m.<a class="code" href="classKJS_1_1UString.html#a9803bb317f9ad51ce189c2f688cf1941">substr</a>(0,e+1));
<a name="l00418"></a>00418 }
<a name="l00419"></a>00419 <span class="keywordflow">else</span> {
<a name="l00420"></a>00420 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1String.html" title="Represents an primitive String value.">String</a>(s+<span class="stringliteral">"0."</span>+char_sequence(<span class="charliteral">'0'</span>,-(e+1))+m);
<a name="l00421"></a>00421 }
<a name="l00422"></a>00422 }
<a name="l00423"></a>00423 }
<a name="l00424"></a>00424
<a name="l00425"></a>00425 <span class="keywordflow">return</span> result;
<a name="l00426"></a>00426 }
<a name="l00427"></a>00427
<a name="l00428"></a>00428 <span class="comment">// ------------------------------ NumberObjectImp ------------------------------</span>
<a name="l00429"></a>00429
<a name="l00430"></a>00430 <span class="keyword">const</span> <a class="code" href="structKJS_1_1ClassInfo.html" title="Class Information.">ClassInfo</a> NumberObjectImp::info = {<span class="stringliteral">"Function"</span>, &InternalFunctionImp::info, &numberTable, 0};
<a name="l00431"></a>00431
<a name="l00432"></a>00432 <span class="comment">/* Source for number_object.lut.h</span>
<a name="l00433"></a>00433 <span class="comment">@begin numberTable 5</span>
<a name="l00434"></a>00434 <span class="comment"> NaN NumberObjectImp::NaNValue DontEnum|DontDelete|ReadOnly</span>
<a name="l00435"></a>00435 <span class="comment"> NEGATIVE_INFINITY NumberObjectImp::NegInfinity DontEnum|DontDelete|ReadOnly</span>
<a name="l00436"></a>00436 <span class="comment"> POSITIVE_INFINITY NumberObjectImp::PosInfinity DontEnum|DontDelete|ReadOnly</span>
<a name="l00437"></a>00437 <span class="comment"> MAX_VALUE NumberObjectImp::MaxValue DontEnum|DontDelete|ReadOnly</span>
<a name="l00438"></a>00438 <span class="comment"> MIN_VALUE NumberObjectImp::MinValue DontEnum|DontDelete|ReadOnly</span>
<a name="l00439"></a>00439 <span class="comment">@end</span>
<a name="l00440"></a>00440 <span class="comment">*/</span>
<a name="l00441"></a>00441 NumberObjectImp::NumberObjectImp(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> * <span class="comment">/*exec*/</span>,
<a name="l00442"></a>00442 <a class="code" href="classKJS_1_1FunctionPrototypeImp.html" title="The initial value of Function.prototype (and thus all objects created with the Function constructor)...">FunctionPrototypeImp</a> *funcProto,
<a name="l00443"></a>00443 NumberPrototypeImp *numberProto)
<a name="l00444"></a>00444 : <a class="code" href="classKJS_1_1InternalFunctionImp.html" title="Base class for all function objects.">InternalFunctionImp</a>(funcProto)
<a name="l00445"></a>00445 {
<a name="l00446"></a>00446 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> protect(<span class="keyword">this</span>);
<a name="l00447"></a>00447 <span class="comment">// Number.Prototype</span>
<a name="l00448"></a>00448 putDirect(prototypePropertyName, numberProto, DontEnum|DontDelete|ReadOnly);
<a name="l00449"></a>00449
<a name="l00450"></a>00450 <span class="comment">// no. of arguments for constructor</span>
<a name="l00451"></a>00451 putDirect(lengthPropertyName, NumberImp::one(), ReadOnly|DontDelete|DontEnum);
<a name="l00452"></a>00452 }
<a name="l00453"></a>00453
<a name="l00454"></a>00454 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> NumberObjectImp::get(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> *exec, <span class="keyword">const</span> <a class="code" href="classKJS_1_1Identifier.html" title="Represents an Identifier for a Javascript object.">Identifier</a> &propertyName)<span class="keyword"> const</span>
<a name="l00455"></a>00455 <span class="keyword"></span>{
<a name="l00456"></a>00456 <span class="keywordflow">return</span> lookupGetValue<NumberObjectImp, InternalFunctionImp>( exec, propertyName, &numberTable, this );
<a name="l00457"></a>00457 }
<a name="l00458"></a>00458
<a name="l00459"></a>00459 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> NumberObjectImp::getValueProperty(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> *, <span class="keywordtype">int</span> token)<span class="keyword"> const</span>
<a name="l00460"></a>00460 <span class="keyword"></span>{
<a name="l00461"></a>00461 <span class="comment">// ECMA 15.7.3</span>
<a name="l00462"></a>00462 <span class="keywordflow">switch</span>(token) {
<a name="l00463"></a>00463 <span class="keywordflow">case</span> NaNValue:
<a name="l00464"></a>00464 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a>(NaN);
<a name="l00465"></a>00465 <span class="keywordflow">case</span> NegInfinity:
<a name="l00466"></a>00466 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a>(-Inf);
<a name="l00467"></a>00467 <span class="keywordflow">case</span> PosInfinity:
<a name="l00468"></a>00468 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a>(Inf);
<a name="l00469"></a>00469 <span class="keywordflow">case</span> MaxValue:
<a name="l00470"></a>00470 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a>(1.7976931348623157E+308);
<a name="l00471"></a>00471 <span class="keywordflow">case</span> MinValue:
<a name="l00472"></a>00472 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a>(5E-324);
<a name="l00473"></a>00473 }
<a name="l00474"></a>00474 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1Null.html" title="Represents an primitive Null value.">Null</a>();
<a name="l00475"></a>00475 }
<a name="l00476"></a>00476
<a name="l00477"></a>00477 <span class="keywordtype">bool</span> NumberObjectImp::implementsConstruct()<span class="keyword"> const</span>
<a name="l00478"></a>00478 <span class="keyword"></span>{
<a name="l00479"></a>00479 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00480"></a>00480 }
<a name="l00481"></a>00481
<a name="l00482"></a>00482
<a name="l00483"></a>00483 <span class="comment">// ECMA 15.7.1</span>
<a name="l00484"></a>00484 <a class="code" href="classKJS_1_1Object.html" title="Represents an Object.">Object</a> NumberObjectImp::construct(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> *exec, <span class="keyword">const</span> <a class="code" href="classKJS_1_1List.html" title="Native list type.">List</a> &args)
<a name="l00485"></a>00485 {
<a name="l00486"></a>00486 ObjectImp *proto = exec-><a class="code" href="classKJS_1_1ExecState.html#af210e5fad440d91a939e71ccb2bf6be7" title="Returns the interpreter associated with the current scope's global object.">lexicalInterpreter</a>()-><a class="code" href="classKJS_1_1Interpreter.html#abe07b8e3809048976edae972183e4e87" title="Returns the builtin "Number.prototype" object.">builtinNumberPrototype</a>().imp();
<a name="l00487"></a>00487 <a class="code" href="classKJS_1_1Object.html" title="Represents an Object.">Object</a> obj(<span class="keyword">new</span> NumberInstanceImp(proto));
<a name="l00488"></a>00488
<a name="l00489"></a>00489 <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a> n;
<a name="l00490"></a>00490 <span class="keywordflow">if</span> (args.<a class="code" href="classKJS_1_1List.html#a6356629da9e2c8cff0e0cbe9f7f61bac">isEmpty</a>())
<a name="l00491"></a>00491 n = <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a>(0);
<a name="l00492"></a>00492 <span class="keywordflow">else</span>
<a name="l00493"></a>00493 n = args[0].toNumber(exec);
<a name="l00494"></a>00494
<a name="l00495"></a>00495 obj.setInternalValue(n);
<a name="l00496"></a>00496
<a name="l00497"></a>00497 <span class="keywordflow">return</span> obj;
<a name="l00498"></a>00498 }
<a name="l00499"></a>00499
<a name="l00500"></a>00500 <span class="keywordtype">bool</span> NumberObjectImp::implementsCall()<span class="keyword"> const</span>
<a name="l00501"></a>00501 <span class="keyword"></span>{
<a name="l00502"></a>00502 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00503"></a>00503 }
<a name="l00504"></a>00504
<a name="l00505"></a>00505 <span class="comment">// ECMA 15.7.2</span>
<a name="l00506"></a>00506 <a class="code" href="classKJS_1_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> NumberObjectImp::call(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> *exec, <a class="code" href="classKJS_1_1Object.html" title="Represents an Object.">Object</a> &<span class="comment">/*thisObj*/</span>, <span class="keyword">const</span> <a class="code" href="classKJS_1_1List.html" title="Native list type.">List</a> &args)
<a name="l00507"></a>00507 {
<a name="l00508"></a>00508 <span class="keywordflow">if</span> (args.<a class="code" href="classKJS_1_1List.html#a6356629da9e2c8cff0e0cbe9f7f61bac">isEmpty</a>())
<a name="l00509"></a>00509 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a>(0);
<a name="l00510"></a>00510 <span class="keywordflow">else</span>
<a name="l00511"></a>00511 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1Number.html" title="Represents an primitive Number value.">Number</a>(args[0].toNumber(exec));
<a name="l00512"></a>00512 }
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