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<li class="level1"><a href="#public-functions">Public Functions</a></li>
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<h1 class="title">Q3AsciiDict Class Reference</h1>
<!-- $$$Q3AsciiDict-brief -->
<p>The Q3AsciiDict class is a template class that provides a dictionary based on char* keys. <a href="#details">More...</a></p>
<!-- @@@Q3AsciiDict -->
<pre class="cpp"> <span class="preprocessor">#include <Q3AsciiDict></span></pre><p><b>This class is part of the Qt 3 support library.</b> It is provided to keep old source code working. We strongly advise against using it in new code. See <a href="porting4.html">Porting to Qt 4</a> for more information.</p>
<p><b>Inherits: </b><a href="q3ptrcollection.html">Q3PtrCollection</a>.</p>
<ul>
<li><a href="q3asciidict-members.html">List of all members, including inherited members</a></li>
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<a name="public-functions"></a>
<h2>Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#Q3AsciiDict">Q3AsciiDict</a></b> ( int <i>size</i> = 17, bool <i>caseSensitive</i> = true, bool <i>copyKeys</i> = true )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#Q3AsciiDict-2">Q3AsciiDict</a></b> ( const Q3AsciiDict<type> & <i>dict</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#dtor.Q3AsciiDict">~Q3AsciiDict</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> type * </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#find">find</a></b> ( const char * <i>key</i> ) const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#insert">insert</a></b> ( const char * <i>key</i>, const type * <i>item</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#isEmpty">isEmpty</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> bool </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#remove">remove</a></b> ( const char * <i>key</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#replace">replace</a></b> ( const char * <i>key</i>, const type * <i>item</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#resize">resize</a></b> ( uint <i>newsize</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> uint </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#size">size</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> void </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#statistics">statistics</a></b> () const</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> type * </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#take">take</a></b> ( const char * <i>key</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> Q3AsciiDict<type> & </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#operator-eq">operator=</a></b> ( const Q3AsciiDict<type> & <i>dict</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> type * </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#operator-5b-5d">operator[]</a></b> ( const char * <i>key</i> ) const</td></tr>
</table>
<a name="reimplemented-public-functions"></a>
<h2>Reimplemented Public Functions</h2>
<table class="alignedsummary">
<tr><td class="memItemLeft rightAlign topAlign"> virtual void </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#clear">clear</a></b> ()</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual uint </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#count">count</a></b> () const</td></tr>
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<li class="fn">4 public functions inherited from <a href="q3ptrcollection.html#public-functions">Q3PtrCollection</a></li>
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<a name="protected-functions"></a>
<h2>Protected Functions</h2>
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<tr><td class="memItemLeft rightAlign topAlign"> virtual QDataStream & </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#read">read</a></b> ( QDataStream & <i>s</i>, Q3PtrCollection::Item & <i>item</i> )</td></tr>
<tr><td class="memItemLeft rightAlign topAlign"> virtual QDataStream & </td><td class="memItemRight bottomAlign"><b><a href="q3asciidict.html#write">write</a></b> ( QDataStream & <i>s</i>, Q3PtrCollection::Item <i>item</i> ) const</td></tr>
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<li class="fn">2 protected functions inherited from <a href="q3ptrcollection.html#protected-functions">Q3PtrCollection</a></li>
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<a name="details"></a>
<!-- $$$Q3AsciiDict-description -->
<div class="descr">
<h2>Detailed Description</h2>
<p>The Q3AsciiDict class is a template class that provides a dictionary based on char* keys.</p>
<p>Q3AsciiDict is implemented as a template class. Define a template instance Q3AsciiDict<X> to create a dictionary that operates on pointers to X (X*).</p>
<p>A dictionary is a collection of key-value pairs. The key is a char* used for insertion, removal and lookup. The value is a pointer. Dictionaries provide very fast insertion and lookup.</p>
<p>Q3AsciiDict cannot handle Unicode keys; use the <a href="q3dict.html">Q3Dict</a> template instead, which uses <a href="qstring.html">QString</a> keys. A <a href="q3dict.html">Q3Dict</a> has the same performace as a Q3AsciiDict.</p>
<p>Example:</p>
<pre class="cpp"> <span class="type">Q3AsciiDict</span><span class="operator"><</span><span class="type"><a href="qlineedit.html">QLineEdit</a></span><span class="operator">></span> fields; <span class="comment">// char* keys, QLineEdit* values</span>
fields<span class="operator">.</span><a href="q3asciidict.html#insert">insert</a>( <span class="string">"forename"</span><span class="operator">,</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>( <span class="keyword">this</span> ) );
fields<span class="operator">.</span><a href="q3asciidict.html#insert">insert</a>( <span class="string">"surname"</span><span class="operator">,</span> <span class="keyword">new</span> <span class="type"><a href="qlineedit.html">QLineEdit</a></span>( <span class="keyword">this</span> ) );
fields<span class="operator">[</span><span class="string">"forename"</span><span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setText( <span class="string">"Homer"</span> );
fields<span class="operator">[</span><span class="string">"surname"</span><span class="operator">]</span><span class="operator">-</span><span class="operator">></span>setText( <span class="string">"Simpson"</span> );
<span class="type"><a href="q3asciidictiterator.html">Q3AsciiDictIterator</a></span><span class="operator"><</span><span class="type"><a href="qlineedit.html">QLineEdit</a></span><span class="operator">></span> it( fields ); <span class="comment">// See Q3AsciiDictIterator</span>
<span class="keyword">for</span>( ; it<span class="operator">.</span>current(); <span class="operator">+</span><span class="operator">+</span>it )
cout <span class="operator"><</span><span class="operator"><</span> it<span class="operator">.</span>currentKey() <span class="operator"><</span><span class="operator"><</span> <span class="string">": "</span> <span class="operator"><</span><span class="operator"><</span> it<span class="operator">.</span>current()<span class="operator">-</span><span class="operator">></span>text() <span class="operator"><</span><span class="operator"><</span> endl;
cout <span class="operator"><</span><span class="operator"><</span> endl;
<span class="keyword">if</span> ( fields<span class="operator">[</span><span class="string">"forename"</span><span class="operator">]</span> <span class="operator">&</span><span class="operator">&</span> fields<span class="operator">[</span><span class="string">"surname"</span><span class="operator">]</span> )
cout <span class="operator"><</span><span class="operator"><</span> fields<span class="operator">[</span><span class="string">"forename"</span><span class="operator">]</span><span class="operator">-</span><span class="operator">></span>text() <span class="operator"><</span><span class="operator"><</span> <span class="string">" "</span>
<span class="operator"><</span><span class="operator"><</span> fields<span class="operator">[</span><span class="string">"surname"</span><span class="operator">]</span><span class="operator">-</span><span class="operator">></span>text() <span class="operator"><</span><span class="operator"><</span> endl; <span class="comment">// Prints "Homer Simpson"</span>
fields<span class="operator">.</span><a href="q3asciidict.html#remove">remove</a>( <span class="string">"forename"</span> ); <span class="comment">// Does not delete the line edit</span>
<span class="keyword">if</span> ( <span class="operator">!</span> fields<span class="operator">[</span><span class="string">"forename"</span><span class="operator">]</span> )
cout <span class="operator"><</span><span class="operator"><</span> <span class="string">"forename is not in the dictionary"</span> <span class="operator"><</span><span class="operator"><</span> endl;</pre>
<p>In this example we use a dictionary to keep track of the line edits we're using. We insert each line edit into the dictionary with a unique name and then access the line edits via the dictionary. See <a href="q3ptrdict.html">Q3PtrDict</a>, <a href="q3intdict.html">Q3IntDict</a> and <a href="q3dict.html">Q3Dict</a>.</p>
<p>See <a href="q3dict.html">Q3Dict</a> for full details, including the choice of dictionary size, and how deletions are handled.</p>
</div>
<p><b>See also </b><a href="q3asciidictiterator.html">Q3AsciiDictIterator</a>, <a href="q3dict.html">Q3Dict</a>, <a href="q3intdict.html">Q3IntDict</a>, and <a href="q3ptrdict.html">Q3PtrDict</a>.</p>
<!-- @@@Q3AsciiDict -->
<div class="func">
<h2>Member Function Documentation</h2>
<!-- $$$Q3AsciiDict[overload1]$$$Q3AsciiDictintboolbool -->
<h3 class="fn"><a name="Q3AsciiDict"></a>Q3AsciiDict::<span class="name">Q3AsciiDict</span> ( <span class="type">int</span> <i>size</i> = 17, <span class="type">bool</span> <i>caseSensitive</i> = true, <span class="type">bool</span> <i>copyKeys</i> = true )</h3>
<p>Constructs a dictionary optimized for less than <i>size</i> entries.</p>
<p>We recommend setting <i>size</i> to a suitably large prime number (a bit larger than the expected number of entries). This makes the hash distribution better and will improve lookup performance.</p>
<p>When <i>caseSensitive</i> is TRUE (the default) <a href="q3asciidict.html" class="compat">Q3AsciiDict</a> treats "abc" and "Abc" as different keys; when it is FALSE "abc" and "Abc" are the same. Case-insensitive comparison only considers the 26 letters in US-ASCII.</p>
<p>If <i>copyKeys</i> is TRUE (the default), the dictionary copies keys using strcpy(); if it is FALSE, the dictionary just copies the pointers.</p>
<!-- @@@Q3AsciiDict -->
<!-- $$$Q3AsciiDict$$$Q3AsciiDictconstQ3AsciiDict<type>& -->
<h3 class="fn"><a name="Q3AsciiDict-2"></a>Q3AsciiDict::<span class="name">Q3AsciiDict</span> ( const <span class="type">Q3AsciiDict</span><<span class="type">type</span>> & <i>dict</i> )</h3>
<p>Constructs a copy of <i>dict</i>.</p>
<p>Each item in <i>dict</i> is inserted into this dictionary. Only the pointers are copied (shallow copy).</p>
<!-- @@@Q3AsciiDict -->
<!-- $$$~Q3AsciiDict[overload1]$$$~Q3AsciiDict -->
<h3 class="fn"><a name="dtor.Q3AsciiDict"></a>Q3AsciiDict::<span class="name">~Q3AsciiDict</span> ()</h3>
<p>Removes all items from the dictionary and destroys it.</p>
<p>The items are deleted if auto-delete is enabled.</p>
<p>All iterators that access this dictionary will be reset.</p>
<p><b>See also </b><a href="q3ptrcollection.html#setAutoDelete">setAutoDelete</a>().</p>
<!-- @@@~Q3AsciiDict -->
<!-- $$$clear[overload1]$$$clear -->
<h3 class="fn"><a name="clear"></a><span class="type">void</span> Q3AsciiDict::<span class="name">clear</span> ()<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="q3ptrcollection.html#clear">Q3PtrCollection::clear</a>().</p>
<p>Removes all items from the dictionary.</p>
<p>The removed items are deleted if <a href="q3ptrcollection.html#setAutoDelete">auto-deletion</a> is enabled.</p>
<p>All dictionary iterators that operate on dictionary are reset.</p>
<p><b>See also </b><a href="q3asciidict.html#remove">remove</a>(), <a href="q3asciidict.html#take">take</a>(), and <a href="q3ptrcollection.html#setAutoDelete">setAutoDelete</a>().</p>
<!-- @@@clear -->
<!-- $$$count[overload1]$$$count -->
<h3 class="fn"><a name="count"></a><span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> Q3AsciiDict::<span class="name">count</span> () const<tt> [virtual]</tt></h3>
<p>Reimplemented from <a href="q3ptrcollection.html#count">Q3PtrCollection::count</a>().</p>
<p>Returns the number of items in the dictionary.</p>
<p><b>See also </b><a href="q3asciidict.html#isEmpty">isEmpty</a>().</p>
<!-- @@@count -->
<!-- $$$find[overload1]$$$findconstchar* -->
<h3 class="fn"><a name="find"></a><span class="type">type</span> * Q3AsciiDict::<span class="name">find</span> ( const <span class="type">char</span> * <i>key</i> ) const</h3>
<p>Returns the item associated with <i>key</i>, or 0 if the key does not exist in the dictionary.</p>
<p>This function uses an internal hashing algorithm to optimize lookup.</p>
<p>If there are two or more items with equal keys, then the item that was most recently inserted will be found.</p>
<p>Equivalent to the [] operator.</p>
<p><b>See also </b><a href="q3asciidict.html#operator-5b-5d">operator[]</a>().</p>
<!-- @@@find -->
<!-- $$$insert[overload1]$$$insertconstchar*consttype* -->
<h3 class="fn"><a name="insert"></a><span class="type">void</span> Q3AsciiDict::<span class="name">insert</span> ( const <span class="type">char</span> * <i>key</i>, const <span class="type">type</span> * <i>item</i> )</h3>
<p>Inserts the <i>key</i> with the <i>item</i> into the dictionary.</p>
<p>Multiple items can have the same key, in which case only the last item will be accessible using <a href="q3asciidict.html#operator-5b-5d">operator[]</a>().</p>
<p><i>item</i> may not be 0.</p>
<p><b>See also </b><a href="q3asciidict.html#replace">replace</a>().</p>
<!-- @@@insert -->
<!-- $$$isEmpty[overload1]$$$isEmpty -->
<h3 class="fn"><a name="isEmpty"></a><span class="type">bool</span> Q3AsciiDict::<span class="name">isEmpty</span> () const</h3>
<p>Returns TRUE if the dictionary is empty, i.e. <a href="q3asciidict.html#count">count</a>() == 0; otherwise it returns FALSE.</p>
<p><b>See also </b><a href="q3asciidict.html#count">count</a>().</p>
<!-- @@@isEmpty -->
<!-- $$$read[overload1]$$$readQDataStream&Q3PtrCollection::Item& -->
<h3 class="fn"><a name="read"></a><span class="type"><a href="qdatastream.html">QDataStream</a></span> & Q3AsciiDict::<span class="name">read</span> ( <span class="type"><a href="qdatastream.html">QDataStream</a></span> & <i>s</i>, <span class="type"><a href="q3ptrcollection.html#Item-typedef">Q3PtrCollection::Item</a></span> & <i>item</i> )<tt> [virtual protected]</tt></h3>
<p>Reads a dictionary item from the stream <i>s</i> and returns a reference to the stream.</p>
<p>The default implementation sets <i>item</i> to 0.</p>
<p><b>See also </b><a href="q3asciidict.html#write">write</a>().</p>
<!-- @@@read -->
<!-- $$$remove[overload1]$$$removeconstchar* -->
<h3 class="fn"><a name="remove"></a><span class="type">bool</span> Q3AsciiDict::<span class="name">remove</span> ( const <span class="type">char</span> * <i>key</i> )</h3>
<p>Removes the item associated with <i>key</i> from the dictionary. Returns TRUE if successful, i.e. if the key existed in the dictionary; otherwise returns FALSE.</p>
<p>If there are two or more items with equal keys, then the most recently inserted item will be removed.</p>
<p>The removed item is deleted if <a href="q3ptrcollection.html#setAutoDelete">auto-deletion</a> is enabled.</p>
<p>All dictionary iterators that refer to the removed item will be set to point to the next item in the dictionary traversal order.</p>
<p><b>See also </b><a href="q3asciidict.html#take">take</a>(), <a href="q3asciidict.html#clear">clear</a>(), and <a href="q3ptrcollection.html#setAutoDelete">setAutoDelete</a>().</p>
<!-- @@@remove -->
<!-- $$$replace[overload1]$$$replaceconstchar*consttype* -->
<h3 class="fn"><a name="replace"></a><span class="type">void</span> Q3AsciiDict::<span class="name">replace</span> ( const <span class="type">char</span> * <i>key</i>, const <span class="type">type</span> * <i>item</i> )</h3>
<p>Replaces an item that has a key equal to <i>key</i> with <i>item</i>.</p>
<p>If the item does not already exist, it will be inserted.</p>
<p><i>item</i> may not be 0.</p>
<p>Equivalent to:</p>
<pre class="cpp"> <span class="type"><a href="q3asciidict.html">Q3AsciiDict</a></span><span class="operator"><</span><span class="type">char</span><span class="operator">></span> dict;
<span class="operator">.</span><span class="operator">.</span><span class="operator">.</span>
<span class="keyword">if</span> ( dict<span class="operator">.</span>find(key) )
dict<span class="operator">.</span><a href="q3asciidict.html#remove">remove</a>( key );
dict<span class="operator">.</span><a href="q3asciidict.html#insert">insert</a>( key<span class="operator">,</span> item );</pre>
<p>If there are two or more items with equal keys, then the most recently inserted item will be replaced.</p>
<p><b>See also </b><a href="q3asciidict.html#insert">insert</a>().</p>
<!-- @@@replace -->
<!-- $$$resize[overload1]$$$resizeuint -->
<h3 class="fn"><a name="resize"></a><span class="type">void</span> Q3AsciiDict::<span class="name">resize</span> ( <span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> <i>newsize</i> )</h3>
<p>Changes the size of the hashtable to <i>newsize</i>. The contents of the dictionary are preserved but all iterators on the dictionary become invalid.</p>
<!-- @@@resize -->
<!-- $$$size[overload1]$$$size -->
<h3 class="fn"><a name="size"></a><span class="type"><a href="qtglobal.html#uint-typedef">uint</a></span> Q3AsciiDict::<span class="name">size</span> () const</h3>
<p>Returns the size of the internal hash array (as specified in the constructor).</p>
<p><b>See also </b><a href="q3asciidict.html#count">count</a>().</p>
<!-- @@@size -->
<!-- $$$statistics[overload1]$$$statistics -->
<h3 class="fn"><a name="statistics"></a><span class="type">void</span> Q3AsciiDict::<span class="name">statistics</span> () const</h3>
<p>Debugging-only function that prints out the dictionary distribution using <a href="qtglobal.html#qDebug">qDebug</a>().</p>
<!-- @@@statistics -->
<!-- $$$take[overload1]$$$takeconstchar* -->
<h3 class="fn"><a name="take"></a><span class="type">type</span> * Q3AsciiDict::<span class="name">take</span> ( const <span class="type">char</span> * <i>key</i> )</h3>
<p>Takes the item associated with <i>key</i> out of the dictionary without deleting it (even if <a href="q3ptrcollection.html#setAutoDelete">auto-deletion</a> is enabled).</p>
<p>If there are two or more items with equal keys, then the most recently inserted item will be taken.</p>
<p>Returns a pointer to the item taken out, or 0 if the key does not exist in the dictionary.</p>
<p>All dictionary iterators that refer to the taken item will be set to point to the next item in the dictionary traversal order.</p>
<p><b>See also </b><a href="q3asciidict.html#remove">remove</a>(), <a href="q3asciidict.html#clear">clear</a>(), and <a href="q3ptrcollection.html#setAutoDelete">setAutoDelete</a>().</p>
<!-- @@@take -->
<!-- $$$write[overload1]$$$writeQDataStream&Q3PtrCollection::Item -->
<h3 class="fn"><a name="write"></a><span class="type"><a href="qdatastream.html">QDataStream</a></span> & Q3AsciiDict::<span class="name">write</span> ( <span class="type"><a href="qdatastream.html">QDataStream</a></span> & <i>s</i>, <span class="type"><a href="q3ptrcollection.html#Item-typedef">Q3PtrCollection::Item</a></span> <i>item</i> ) const<tt> [virtual protected]</tt></h3>
<p>Writes a dictionary <i>item</i> to the stream <i>s</i> and returns a reference to the stream.</p>
<p><b>See also </b><a href="q3asciidict.html#read">read</a>().</p>
<!-- @@@write -->
<!-- $$$operator=[overload1]$$$operator=constQ3AsciiDict<type>& -->
<h3 class="fn"><a name="operator-eq"></a><span class="type">Q3AsciiDict</span><<span class="type">type</span>> & Q3AsciiDict::<span class="name">operator=</span> ( const <span class="type">Q3AsciiDict</span><<span class="type">type</span>> & <i>dict</i> )</h3>
<p>Assigns <i>dict</i> to this dictionary and returns a reference to this dictionary.</p>
<p>This dictionary is first cleared and then each item in <i>dict</i> is inserted into this dictionary. Only the pointers are copied (shallow copy) unless <a href="q3ptrcollection.html#newItem">newItem</a>() has been reimplemented().</p>
<!-- @@@operator= -->
<!-- $$$operator[][overload1]$$$operator[]constchar* -->
<h3 class="fn"><a name="operator-5b-5d"></a><span class="type">type</span> * Q3AsciiDict::<span class="name">operator[]</span> ( const <span class="type">char</span> * <i>key</i> ) const</h3>
<p>Returns the item associated with <i>key</i>, or 0 if the key does not exist in the dictionary.</p>
<p>This function uses an internal hashing algorithm to optimize lookup.</p>
<p>If there are two or more items with equal keys, then the item that was most recently inserted will be found.</p>
<p>Equivalent to the <a href="q3asciidict.html#find">find</a>() function.</p>
<p><b>See also </b><a href="q3asciidict.html#find">find</a>().</p>
<!-- @@@operator[] -->
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