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<div class="title">reference.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) 2003 Apple Computer, Inc</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * This library is free software; you can redistribute it and/or</span>
<a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the GNU Library General Public</span>
<a name="l00008"></a>00008 <span class="comment"> * License as published by the Free Software Foundation; either</span>
<a name="l00009"></a>00009 <span class="comment"> * version 2 of the License, or (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * This library is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00014"></a>00014 <span class="comment"> * Library General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * You should have received a copy of the GNU Library General Public License</span>
<a name="l00017"></a>00017 <span class="comment"> * along with this library; see the file COPYING.LIB. If not, write to</span>
<a name="l00018"></a>00018 <span class="comment"> * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,</span>
<a name="l00019"></a>00019 <span class="comment"> * 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 "reference.h"</span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "internal.h"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "context.h"</span>
<a name="l00026"></a>00026
<a name="l00027"></a>00027 <span class="preprocessor">#include <assert.h></span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="keyword">using namespace </span>KJS;
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="comment">// ------------------------------ Reference ------------------------------------</span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 Reference::Reference(<span class="keyword">const</span> <a class="code" href="classKJS_1_1Object.html" title="Represents an Object.">Object</a>& b, <span class="keyword">const</span> <a class="code" href="classKJS_1_1Identifier.html" title="Represents an Identifier for a Javascript object.">Identifier</a>& p)
<a name="l00034"></a>00034 : base(b),
<a name="l00035"></a>00035 baseIsValue(false),
<a name="l00036"></a>00036 propertyNameIsNumber(false),
<a name="l00037"></a>00037 prop(p)
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 }
<a name="l00040"></a>00040
<a name="l00041"></a>00041 Reference::Reference(<span class="keyword">const</span> <a class="code" href="classKJS_1_1Object.html" title="Represents an Object.">Object</a>& b, <span class="keywordtype">unsigned</span> p)
<a name="l00042"></a>00042 : base(b),
<a name="l00043"></a>00043 propertyNameAsNumber(p),
<a name="l00044"></a>00044 baseIsValue(false),
<a name="l00045"></a>00045 propertyNameIsNumber(true)
<a name="l00046"></a>00046 {
<a name="l00047"></a>00047 }
<a name="l00048"></a>00048
<a name="l00049"></a>00049 Reference::Reference(ObjectImp *b, <span class="keyword">const</span> <a class="code" href="classKJS_1_1Identifier.html" title="Represents an Identifier for a Javascript object.">Identifier</a>& p)
<a name="l00050"></a>00050 : base(b),
<a name="l00051"></a>00051 baseIsValue(false),
<a name="l00052"></a>00052 propertyNameIsNumber(false),
<a name="l00053"></a>00053 prop(p)
<a name="l00054"></a>00054 {
<a name="l00055"></a>00055 }
<a name="l00056"></a>00056
<a name="l00057"></a>00057 Reference::Reference(ObjectImp *b, <span class="keywordtype">unsigned</span> p)
<a name="l00058"></a>00058 : base(b),
<a name="l00059"></a>00059 propertyNameAsNumber(p),
<a name="l00060"></a>00060 baseIsValue(false),
<a name="l00061"></a>00061 propertyNameIsNumber(true)
<a name="l00062"></a>00062 {
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064
<a name="l00065"></a>00065 Reference::Reference(<span class="keyword">const</span> <a class="code" href="classKJS_1_1Null.html" title="Represents an primitive Null value.">Null</a>& b, <span class="keyword">const</span> <a class="code" href="classKJS_1_1Identifier.html" title="Represents an Identifier for a Javascript object.">Identifier</a>& p)
<a name="l00066"></a>00066 : base(b),
<a name="l00067"></a>00067 baseIsValue(false),
<a name="l00068"></a>00068 propertyNameIsNumber(false),
<a name="l00069"></a>00069 prop(p)
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a>00073 Reference::Reference(<span class="keyword">const</span> <a class="code" href="classKJS_1_1Null.html" title="Represents an primitive Null value.">Null</a>& b, <span class="keywordtype">unsigned</span> p)
<a name="l00074"></a>00074 : base(b),
<a name="l00075"></a>00075 propertyNameAsNumber(p),
<a name="l00076"></a>00076 baseIsValue(false),
<a name="l00077"></a>00077 propertyNameIsNumber(true)
<a name="l00078"></a>00078 {
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080
<a name="l00081"></a>00081 <a class="code" href="classKJS_1_1Reference.html" title="Defines a Javascript reference.">Reference</a> Reference::makeValueReference(<span class="keyword">const</span> <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)
<a name="l00082"></a>00082 {
<a name="l00083"></a>00083 <a class="code" href="classKJS_1_1Reference.html" title="Defines a Javascript reference.">Reference</a> valueRef;
<a name="l00084"></a>00084 valueRef.base = v;
<a name="l00085"></a>00085 valueRef.baseIsValue = <span class="keyword">true</span>;
<a name="l00086"></a>00086 <span class="keywordflow">return</span> valueRef;
<a name="l00087"></a>00087 }
<a name="l00088"></a>00088
<a name="l00089"></a>00089 Reference::Reference()
<a name="l00090"></a>00090 {
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
<a name="l00093"></a><a class="code" href="classKJS_1_1Reference.html#af070cb7ed41d232ffd418e47a29b07c2">00093</a> <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> <a class="code" href="classKJS_1_1Reference.html#af070cb7ed41d232ffd418e47a29b07c2" title="Performs the GetBase type conversion operation on this value (ECMA 8.7)">Reference::getBase</a>(<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 name="l00094"></a>00094 <span class="keyword"></span>{
<a name="l00095"></a>00095 <span class="keywordflow">if</span> (baseIsValue) {
<a name="l00096"></a>00096 <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, ReferenceError, I18N_NOOP(<span class="stringliteral">"Invalid reference base"</span>));
<a name="l00097"></a>00097 exec->setException(err);
<a name="l00098"></a>00098 <span class="keywordflow">return</span> err;
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keywordflow">return</span> base;
<a name="l00102"></a>00102 }
<a name="l00103"></a>00103
<a name="l00104"></a><a class="code" href="classKJS_1_1Reference.html#af93ee43d7fedeb3437a3b2f23f7ad3a9">00104</a> <a class="code" href="classKJS_1_1Identifier.html" title="Represents an Identifier for a Javascript object.">Identifier</a> <a class="code" href="classKJS_1_1Reference.html#af93ee43d7fedeb3437a3b2f23f7ad3a9" title="Performs the GetPropertyName type conversion operation on this value (ECMA 8.7)">Reference::getPropertyName</a>(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> * <span class="comment">/*exec*/</span>)<span class="keyword"> const</span>
<a name="l00105"></a>00105 <span class="keyword"></span>{
<a name="l00106"></a>00106 <span class="keywordflow">if</span> (baseIsValue) {
<a name="l00107"></a>00107 <span class="comment">// the spec wants a runtime error here. But getValue() and putValue()</span>
<a name="l00108"></a>00108 <span class="comment">// will catch this case on their own earlier. When returning a Null</span>
<a name="l00109"></a>00109 <span class="comment">// string we should be on the safe side.</span>
<a name="l00110"></a>00110 <span class="keywordflow">return</span> <a class="code" href="classKJS_1_1Identifier.html" title="Represents an Identifier for a Javascript object.">Identifier</a>();
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="keywordflow">if</span> (propertyNameIsNumber && prop.<a class="code" href="classKJS_1_1Identifier.html#a705aa70a7c5ef56ddfda2db508526bde" title="Returns the identfiers state of being unset.">isNull</a>())
<a name="l00114"></a>00114 prop = Identifier::from(propertyNameAsNumber);
<a name="l00115"></a>00115 <span class="keywordflow">return</span> prop;
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a><a class="code" href="classKJS_1_1Reference.html#a0b221dd9c9eb8681f49adf852402dfb0">00118</a> <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> <a class="code" href="classKJS_1_1Reference.html#a0b221dd9c9eb8681f49adf852402dfb0" title="Performs the GetValue type conversion operation on this value (ECMA 8.7.1)">Reference::getValue</a>(<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 name="l00119"></a>00119 <span class="keyword"></span>{
<a name="l00120"></a>00120 <span class="keywordflow">if</span> (baseIsValue) {
<a name="l00121"></a>00121 <span class="keywordflow">return</span> base;
<a name="l00122"></a>00122 }
<a name="l00123"></a>00123
<a name="l00124"></a>00124 <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> o = <a class="code" href="classKJS_1_1Reference.html#af070cb7ed41d232ffd418e47a29b07c2" title="Performs the GetBase type conversion operation on this value (ECMA 8.7)">getBase</a>(exec);
<a name="l00125"></a>00125
<a name="l00126"></a>00126 <span class="keywordflow">if</span> (!o.<a class="code" href="classKJS_1_1Value.html#acd8509ab6b7622c16fdf021803fdd2cb" title="Returns whether or not this is a valid value.">isValid</a>() || o.<a class="code" href="classKJS_1_1Value.html#ae452f07da93d3888448158e634d71657" title="Returns the type of value.">type</a>() == NullType) {
<a name="l00127"></a>00127 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> m = I18N_NOOP(<span class="stringliteral">"Can't find variable: "</span>) + <a class="code" href="classKJS_1_1Reference.html#af93ee43d7fedeb3437a3b2f23f7ad3a9" title="Performs the GetPropertyName type conversion operation on this value (ECMA 8.7)">getPropertyName</a>(exec).<a class="code" href="classKJS_1_1Identifier.html#a60e1a5523bb219a8e427733682ad7955" title="returns a UString of the identifier">ustring</a>();
<a name="l00128"></a>00128 <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, ReferenceError, m.<a class="code" href="classKJS_1_1UString.html#a2ac3d2b62d65d075f2d99bf7ed2ec366" title="Convert the Unicode string to plain ASCII chars chopping of any higher bytes.">ascii</a>());
<a name="l00129"></a>00129 exec->setException(err);
<a name="l00130"></a>00130 <span class="keywordflow">return</span> err;
<a name="l00131"></a>00131 }
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <span class="keywordflow">if</span> (o.<a class="code" href="classKJS_1_1Value.html#ae452f07da93d3888448158e634d71657" title="Returns the type of value.">type</a>() != ObjectType) {
<a name="l00134"></a>00134 <a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a> m = I18N_NOOP(<span class="stringliteral">"Base is not an object"</span>);
<a name="l00135"></a>00135 <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, ReferenceError, m.<a class="code" href="classKJS_1_1UString.html#a2ac3d2b62d65d075f2d99bf7ed2ec366" title="Convert the Unicode string to plain ASCII chars chopping of any higher bytes.">ascii</a>());
<a name="l00136"></a>00136 exec->setException(err);
<a name="l00137"></a>00137 <span class="keywordflow">return</span> err;
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139
<a name="l00140"></a>00140 ObjectImp *oimp = <span class="keyword">static_cast<</span>ObjectImp*<span class="keyword">></span>(o.imp());
<a name="l00141"></a>00141 <span class="keywordflow">if</span> (propertyNameIsNumber)
<a name="l00142"></a>00142 <span class="keywordflow">return</span> oimp->getPropertyByIndex(exec, propertyNameAsNumber);
<a name="l00143"></a>00143 <span class="keywordflow">return</span> oimp-><a class="code" href="classKJS_1_1Object.html#a394b5e197af70d97568c5e17fe61b19f" title="Retrieves the specified property from the object.">get</a>(exec, prop);
<a name="l00144"></a>00144 }
<a name="l00145"></a>00145
<a name="l00146"></a><a class="code" href="classKJS_1_1Reference.html#a9a7b40644137d1a2a98a3f682c951735">00146</a> <span class="keywordtype">void</span> <a class="code" href="classKJS_1_1Reference.html#a9a7b40644137d1a2a98a3f682c951735" title="Performs the PutValue type conversion operation on this value (ECMA 8.7.1)">Reference::putValue</a>(<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_1Value.html" title="Value objects are act as wrappers ("smart pointers") around ValueImp objects and their descendents...">Value</a> &w)
<a name="l00147"></a>00147 {
<a name="l00148"></a>00148 <span class="keywordflow">if</span> (baseIsValue) {
<a name="l00149"></a>00149 <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,ReferenceError);
<a name="l00150"></a>00150 exec->setException(err);
<a name="l00151"></a>00151 <span class="keywordflow">return</span>;
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153
<a name="l00154"></a>00154 <span class="preprocessor">#ifdef KJS_VERBOSE</span>
<a name="l00155"></a>00155 <span class="preprocessor"></span> printInfo(exec,(<a class="code" href="classKJS_1_1UString.html" title="Unicode string class.">UString</a>(<span class="stringliteral">"setting property "</span>)+<a class="code" href="classKJS_1_1Reference.html#af93ee43d7fedeb3437a3b2f23f7ad3a9" title="Performs the GetPropertyName type conversion operation on this value (ECMA 8.7)">getPropertyName</a>(exec).ustring()).cstring().c_str(),w);
<a name="l00156"></a>00156 <span class="preprocessor">#endif</span>
<a name="l00157"></a>00157 <span class="preprocessor"></span> <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> o = <a class="code" href="classKJS_1_1Reference.html#af070cb7ed41d232ffd418e47a29b07c2" title="Performs the GetBase type conversion operation on this value (ECMA 8.7)">getBase</a>(exec);
<a name="l00158"></a>00158 <span class="keywordflow">if</span> (o.<a class="code" href="classKJS_1_1Value.html#ae452f07da93d3888448158e634d71657" title="Returns the type of value.">type</a>() == NullType)
<a name="l00159"></a>00159 o = <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>(exec-><a class="code" href="classKJS_1_1ExecState.html#aa2835385776b40626e4cf06887c0550e" title="Returns the execution context associated with this execution state.">context</a>().imp()->scopeChain().bottom());
<a name="l00160"></a>00160
<a name="l00161"></a>00161 ObjectImp *oimp = <span class="keyword">static_cast<</span>ObjectImp*<span class="keyword">></span>(o.imp());
<a name="l00162"></a>00162 <span class="keywordflow">if</span> (propertyNameIsNumber)
<a name="l00163"></a>00163 oimp->putPropertyByIndex(exec, propertyNameAsNumber, w);
<a name="l00164"></a>00164 <span class="keywordflow">else</span>
<a name="l00165"></a>00165 oimp->put(exec, prop, w);
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="keywordtype">bool</span> Reference::deleteValue(<a class="code" href="classKJS_1_1ExecState.html" title="Represents the current state of script execution.">ExecState</a> *exec)
<a name="l00169"></a>00169 {
<a name="l00170"></a>00170 <span class="keywordflow">if</span> (baseIsValue) {
<a name="l00171"></a>00171 <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,ReferenceError);
<a name="l00172"></a>00172 exec->setException(err);
<a name="l00173"></a>00173 <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00174"></a>00174 }
<a name="l00175"></a>00175
<a name="l00176"></a>00176 <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> b = <a class="code" href="classKJS_1_1Reference.html#af070cb7ed41d232ffd418e47a29b07c2" title="Performs the GetBase type conversion operation on this value (ECMA 8.7)">getBase</a>(exec);
<a name="l00177"></a>00177
<a name="l00178"></a>00178 <span class="comment">// The spec doesn't mention what to do if the base is null... just return true</span>
<a name="l00179"></a>00179 <span class="keywordflow">if</span> (b.<a class="code" href="classKJS_1_1Value.html#ae452f07da93d3888448158e634d71657" title="Returns the type of value.">type</a>() != ObjectType) {
<a name="l00180"></a>00180 assert(b.<a class="code" href="classKJS_1_1Value.html#ae452f07da93d3888448158e634d71657" title="Returns the type of value.">type</a>() == NullType);
<a name="l00181"></a>00181 <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183
<a name="l00184"></a>00184 ObjectImp *bimp = <span class="keyword">static_cast<</span>ObjectImp*<span class="keyword">></span>(b.imp());
<a name="l00185"></a>00185 <span class="keywordflow">if</span> (propertyNameIsNumber)
<a name="l00186"></a>00186 <span class="keywordflow">return</span> bimp->deletePropertyByIndex(exec, propertyNameAsNumber);
<a name="l00187"></a>00187 <span class="keywordflow">return</span> bimp->deleteProperty(exec, prop);
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189
<a name="l00190"></a>00190 <span class="keywordtype">bool</span> Reference::isMutable()
<a name="l00191"></a>00191 {
<a name="l00192"></a>00192 <span class="keywordflow">return</span> !baseIsValue;
<a name="l00193"></a>00193 }
</pre></div></div>
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