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<h1>antlr/InputBuffer.hpp</h1> </div>
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<a href="InputBuffer_8hpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef INC_InputBuffer_hpp__</span>
<a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define INC_InputBuffer_hpp__</span>
<a name="l00003"></a>00003 <span class="preprocessor"></span>
<a name="l00004"></a>00004 <span class="comment">/* ANTLR Translator Generator</span>
<a name="l00005"></a>00005 <span class="comment"> * Project led by Terence Parr at http://www.jGuru.com</span>
<a name="l00006"></a>00006 <span class="comment"> * Software rights: http://www.antlr.org/license.html</span>
<a name="l00007"></a>00007 <span class="comment"> *</span>
<a name="l00008"></a>00008 <span class="comment"> * $Id: //depot/code/org.antlr/release/antlr-2.7.7/lib/cpp/antlr/InputBuffer.hpp#2 $</span>
<a name="l00009"></a>00009 <span class="comment"> */</span>
<a name="l00010"></a>00010
<a name="l00011"></a>00011 <span class="preprocessor">#include <antlr/config.hpp></span>
<a name="l00012"></a>00012 <span class="preprocessor">#include <antlr/CircularQueue.hpp></span>
<a name="l00013"></a>00013 <span class="preprocessor">#include <string></span>
<a name="l00014"></a>00014
<a name="l00015"></a>00015 <span class="preprocessor">#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE</span>
<a name="l00016"></a>00016 <span class="preprocessor"></span><span class="keyword">namespace </span>antlr {
<a name="l00017"></a>00017 <span class="preprocessor">#endif</span>
<a name="l00018"></a>00018 <span class="preprocessor"></span>
<a name="l00031"></a><a class="code" href="classInputBuffer.html">00031</a> <span class="keyword">class </span><a class="code" href="config_8hpp.html#ad583892c7af76867441115e41aa1ce52">ANTLR_API</a> <a class="code" href="classInputBuffer.html">InputBuffer</a> {
<a name="l00032"></a>00032 <span class="keyword">public</span>:
<a name="l00034"></a><a class="code" href="classInputBuffer.html#a539e007478e6a19dd2c933e2fe6f6b5c">00034</a> <a class="code" href="classInputBuffer.html">InputBuffer</a>()
<a name="l00035"></a>00035 : nMarkers(0)
<a name="l00036"></a>00036 , markerOffset(0)
<a name="l00037"></a>00037 , numToConsume(0)
<a name="l00038"></a>00038 {
<a name="l00039"></a>00039 }
<a name="l00040"></a>00040
<a name="l00041"></a><a class="code" href="classInputBuffer.html#ac8e553cdc4097665450a7b83b797475c">00041</a> <span class="keyword">virtual</span> ~<a class="code" href="classInputBuffer.html">InputBuffer</a>()
<a name="l00042"></a>00042 {
<a name="l00043"></a>00043 }
<a name="l00044"></a>00044
<a name="l00046"></a><a class="code" href="classInputBuffer.html#a8775d70258996e18e59b5224ee5b3193">00046</a> <span class="keyword">virtual</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> reset( <span class="keywordtype">void</span> )
<a name="l00047"></a>00047 {
<a name="l00048"></a>00048 nMarkers = 0;
<a name="l00049"></a>00049 markerOffset = 0;
<a name="l00050"></a>00050 numToConsume = 0;
<a name="l00051"></a>00051 queue.clear();
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053
<a name="l00060"></a><a class="code" href="classInputBuffer.html#aeeb2f071b0846b297e0883988c5b4e30">00060</a> <span class="keyword">inline</span> <span class="keywordtype">void</span> commit( <span class="keywordtype">void</span> )
<a name="l00061"></a>00061 {
<a name="l00062"></a>00062 nMarkers--;
<a name="l00063"></a>00063 }
<a name="l00064"></a>00064
<a name="l00066"></a><a class="code" href="classInputBuffer.html#a7fc02531cd092b4be5db785129357c90">00066</a> <span class="keyword">virtual</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> consume()
<a name="l00067"></a>00067 {
<a name="l00068"></a>00068 numToConsume++;
<a name="l00069"></a>00069 }
<a name="l00070"></a>00070
<a name="l00072"></a>00072 <span class="keyword">virtual</span> <span class="keywordtype">void</span> fill(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> amount);
<a name="l00073"></a>00073
<a name="l00075"></a>00075 <span class="keyword">virtual</span> <span class="keywordtype">int</span> getChar()=0;
<a name="l00076"></a>00076
<a name="l00078"></a><a class="code" href="classInputBuffer.html#a9131f6a5044231af073cb0aeb31668a8">00078</a> <span class="keyword">virtual</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> LA(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> i)
<a name="l00079"></a>00079 {
<a name="l00080"></a>00080 fill(i);
<a name="l00081"></a>00081 <span class="keywordflow">return</span> queue.elementAt(markerOffset + i - 1);
<a name="l00082"></a>00082 }
<a name="l00083"></a>00083
<a name="l00087"></a>00087 <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> mark();
<a name="l00089"></a><a class="code" href="classInputBuffer.html#a5baaa73c4ac1cc17765918f4b1cc8426">00089</a> <span class="keyword">virtual</span> <span class="keyword">inline</span> <span class="keywordtype">bool</span> isMarked()<span class="keyword"> const</span>
<a name="l00090"></a>00090 <span class="keyword"> </span>{
<a name="l00091"></a>00091 <span class="keywordflow">return</span> (nMarkers != 0);
<a name="l00092"></a>00092 }
<a name="l00096"></a>00096 <span class="keyword">virtual</span> <span class="keywordtype">void</span> rewind(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> mark);
<a name="l00097"></a>00097
<a name="l00100"></a>00100 <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> entries() <span class="keyword">const</span>;
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <a class="code" href="config_8hpp.html#ad1e4025d0db4046e6e85a46c92b7ff77">ANTLR_USE_NAMESPACE</a>(std)string getLAChars() const;
<a name="l00103"></a>00103
<a name="l00104"></a>00104 <a class="code" href="config_8hpp.html#ad1e4025d0db4046e6e85a46c92b7ff77">ANTLR_USE_NAMESPACE</a>(std)<span class="keywordtype">string</span> getMarkedChars() const;
<a name="l00105"></a>00105
<a name="l00106"></a>00106 protected:
<a name="l00107"></a>00107 <span class="comment">// char source</span>
<a name="l00108"></a>00108 <span class="comment">// leave to subclasses</span>
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="comment">// Number of active markers</span>
<a name="l00111"></a><a class="code" href="classInputBuffer.html#a5697a1f8c161d84728169492db14d61b">00111</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nMarkers; <span class="comment">// = 0;</span>
<a name="l00112"></a>00112
<a name="l00113"></a>00113 <span class="comment">// Additional offset used when markers are active</span>
<a name="l00114"></a><a class="code" href="classInputBuffer.html#a248eb1b09530c9c6aad7566ea80cc0c9">00114</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> markerOffset; <span class="comment">// = 0;</span>
<a name="l00115"></a>00115
<a name="l00116"></a>00116 <span class="comment">// Number of calls to consume() since last LA() or LT() call</span>
<a name="l00117"></a><a class="code" href="classInputBuffer.html#a8061c7a999bfdc9c68f47f0946bb5ad2">00117</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> numToConsume; <span class="comment">// = 0;</span>
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="comment">// Circular queue</span>
<a name="l00120"></a><a class="code" href="classInputBuffer.html#ab7f62cafe5cbd85489ed13d994336d60">00120</a> <a class="code" href="classCircularQueue.html">CircularQueue</a><<span class="keywordtype">int</span>> queue;
<a name="l00121"></a>00121
<a name="l00123"></a>00123 <span class="keywordtype">void</span> syncConsume();
<a name="l00124"></a>00124
<a name="l00125"></a>00125 private:
<a name="l00126"></a>00126 <a class="code" href="classInputBuffer.html">InputBuffer</a>(const <a class="code" href="classInputBuffer.html">InputBuffer</a>& other);
<a name="l00127"></a>00127 <a class="code" href="classInputBuffer.html">InputBuffer</a>& operator=(const <a class="code" href="classInputBuffer.html">InputBuffer</a>& other);
<a name="l00128"></a>00128 };
<a name="l00129"></a>00129
<a name="l00131"></a><a class="code" href="classInputBuffer.html#a77e530c53e5e18862d06bedf2af94c81">00131</a> inline <span class="keywordtype">void</span> <a class="code" href="classInputBuffer.html">InputBuffer</a>::syncConsume() {
<a name="l00132"></a>00132 <span class="keywordflow">if</span> (numToConsume > 0)
<a name="l00133"></a>00133 {
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (nMarkers > 0)
<a name="l00135"></a>00135 markerOffset += numToConsume;
<a name="l00136"></a>00136 <span class="keywordflow">else</span>
<a name="l00137"></a>00137 queue.removeItems( numToConsume );
<a name="l00138"></a>00138 numToConsume = 0;
<a name="l00139"></a>00139 }
<a name="l00140"></a>00140 }
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="preprocessor">#ifdef ANTLR_CXX_SUPPORTS_NAMESPACE</span>
<a name="l00143"></a>00143 <span class="preprocessor"></span>}
<a name="l00144"></a>00144 <span class="preprocessor">#endif</span>
<a name="l00145"></a>00145 <span class="preprocessor"></span>
<a name="l00146"></a>00146 <span class="preprocessor">#endif //INC_InputBuffer_hpp__</span>
</pre></div></div>
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