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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=UTF-8"><title>Crypto++: zdeflate.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"><link href="tabs.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.5.2 --><div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a href="namespaces.html"><span>Namespaces</span></a></li> <li><a href="classes.html"><span>Classes</span></a></li> <li class="current"><a href="files.html"><span>Files</span></a></li> </ul></div><div class="tabs"> <ul> <li><a href="files.html"><span>File List</span></a></li> <li><a href="globals.html"><span>File Members</span></a></li> </ul></div><h1>zdeflate.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef CRYPTOPP_ZDEFLATE_H</span><a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define CRYPTOPP_ZDEFLATE_H</span><a name="l00003"></a>00003 <span class="preprocessor"></span><a name="l00004"></a>00004 <span class="preprocessor">#include "filters.h"</span><a name="l00005"></a>00005 <span class="preprocessor">#include "misc.h"</span><a name="l00006"></a>00006 <a name="l00007"></a>00007 NAMESPACE_BEGIN(CryptoPP)<a name="l00008"></a>00008 <a name="l00009"></a>00009 <span class="comment">//! _</span><a name="l00010"></a><a class="code" href="class_low_first_bit_writer.html">00010</a> <span class="comment"></span>class <a class="code" href="class_low_first_bit_writer.html" title="_">LowFirstBitWriter</a> : public <a class="code" href="class_filter.html" title="provides an implementation of BufferedTransformation's attachment interface">Filter</a><a name="l00011"></a>00011 {<a name="l00012"></a>00012 <span class="keyword">public</span>:<a name="l00013"></a>00013 <a class="code" href="class_low_first_bit_writer.html" title="_">LowFirstBitWriter</a>(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> *attachment);<a name="l00014"></a>00014 <span class="keywordtype">void</span> PutBits(<span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> value, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);<a name="l00015"></a>00015 <span class="keywordtype">void</span> FlushBitBuffer();<a name="l00016"></a>00016 <span class="keywordtype">void</span> ClearBitBuffer();<a name="l00017"></a>00017 <a name="l00018"></a>00018 <span class="keywordtype">void</span> StartCounting();<a name="l00019"></a>00019 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> FinishCounting();<a name="l00020"></a>00020 <a name="l00021"></a>00021 <span class="keyword">protected</span>:<a name="l00022"></a><a class="code" href="class_low_first_bit_writer.html#58294b1ee6610ff1ac6ead1beb31bace">00022</a> <span class="keywordtype">bool</span> m_counting;<a name="l00023"></a><a class="code" href="class_low_first_bit_writer.html#98734af15461d4d8783b822efb1af291">00023</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> m_bitCount;<a name="l00024"></a><a class="code" href="class_low_first_bit_writer.html#0df2a5478042587afd61c8f2c0c04b59">00024</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> m_buffer;<a name="l00025"></a><a class="code" href="class_low_first_bit_writer.html#75a39e9548b284609320ab615289040d">00025</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_bitsBuffered, m_bytesBuffered;<a name="l00026"></a><a class="code" href="class_low_first_bit_writer.html#ff9c2060798e6c750768b3112721b522">00026</a> <a class="code" href="class_fixed_size_sec_block.html" title="a SecBlock with fixed size, allocated statically">FixedSizeSecBlock<byte, 256></a> m_outputBuffer;<a name="l00027"></a>00027 };<a name="l00028"></a>00028 <span class="comment"></span><a name="l00029"></a>00029 <span class="comment">//! Huffman Encoder</span><a name="l00030"></a><a class="code" href="class_huffman_encoder.html">00030</a> <span class="comment"></span><span class="keyword">class </span><a class="code" href="class_huffman_encoder.html" title="Huffman Encoder.">HuffmanEncoder</a><a name="l00031"></a>00031 {<a name="l00032"></a>00032 <span class="keyword">public</span>:<a name="l00033"></a><a class="code" href="class_huffman_encoder.html#61375c364cc2b5f0d3b877afe8762606">00033</a> <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_huffman_encoder.html#61375c364cc2b5f0d3b877afe8762606">code_t</a>;<a name="l00034"></a><a class="code" href="class_huffman_encoder.html#434191dc5346a9c25a2365bc7da564ad">00034</a> <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_huffman_encoder.html#434191dc5346a9c25a2365bc7da564ad">value_t</a>;<a name="l00035"></a>00035 <a name="l00036"></a><a class="code" href="class_huffman_encoder.html#f2b441522d45cf1e1935673e27d09b30">00036</a> <a class="code" href="class_huffman_encoder.html#f2b441522d45cf1e1935673e27d09b30">HuffmanEncoder</a>() {}<a name="l00037"></a>00037 <a class="code" href="class_huffman_encoder.html#f2b441522d45cf1e1935673e27d09b30">HuffmanEncoder</a>(<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *codeBits, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nCodes);<a name="l00038"></a>00038 <span class="keywordtype">void</span> <a class="code" href="class_huffman_encoder.html#58cdf24aadeaea994f01164e7dea0a3d">Initialize</a>(<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *codeBits, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nCodes);<a name="l00039"></a>00039 <a name="l00040"></a>00040 <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="class_huffman_encoder.html#3067c6ca4d90a282925ce2f2e15b014d">GenerateCodeLengths</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *codeBits, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> maxCodeBits, <span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *codeCounts, <span class="keywordtype">size_t</span> nCodes);<a name="l00041"></a>00041 <a name="l00042"></a>00042 <span class="keywordtype">void</span> <a class="code" href="class_huffman_encoder.html#32d5acf1928d57fcd5bdb1b7f7a76f29">Encode</a>(<a class="code" href="class_low_first_bit_writer.html" title="_">LowFirstBitWriter</a> &writer, <a class="code" href="class_huffman_encoder.html#434191dc5346a9c25a2365bc7da564ad">value_t</a> value) <span class="keyword">const</span>;<a name="l00043"></a>00043 <a name="l00044"></a><a class="code" href="struct_huffman_encoder_1_1_code.html">00044</a> <span class="keyword">struct </span><a class="code" href="struct_huffman_encoder_1_1_code.html">Code</a><a name="l00045"></a>00045 {<a name="l00046"></a><a class="code" href="struct_huffman_encoder_1_1_code.html#824793f1532f9e42159512b3b8f5d0dc">00046</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="struct_huffman_encoder_1_1_code.html#824793f1532f9e42159512b3b8f5d0dc">code</a>;<a name="l00047"></a><a class="code" href="struct_huffman_encoder_1_1_code.html#a258e9ba11dd8c4a76bf5896559f49d4">00047</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="struct_huffman_encoder_1_1_code.html#a258e9ba11dd8c4a76bf5896559f49d4">len</a>;<a name="l00048"></a>00048 };<a name="l00049"></a>00049 <a name="l00050"></a><a class="code" href="class_huffman_encoder.html#100511c8332005139f009b63f828d19e">00050</a> <a class="code" href="class_sec_block.html" title="a block of memory allocated using A">SecBlock<Code></a> <a class="code" href="class_huffman_encoder.html#100511c8332005139f009b63f828d19e">m_valueToCode</a>;<a name="l00051"></a>00051 };<a name="l00052"></a>00052 <span class="comment"></span><a name="l00053"></a>00053 <span class="comment">//! DEFLATE (RFC 1951) compressor</span>⌨️ 快捷键说明
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