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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++: zinflate.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>zinflate.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef CRYPTOPP_ZINFLATE_H</span><a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define CRYPTOPP_ZINFLATE_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 <vector></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_reader.html">00010</a> <span class="comment"></span>class <a class="code" href="class_low_first_bit_reader.html" title="_">LowFirstBitReader</a><a name="l00011"></a>00011 {<a name="l00012"></a>00012 <span class="keyword">public</span>:<a name="l00013"></a><a class="code" href="class_low_first_bit_reader.html#41003d6dad1fa5c03c73cee2c3a47200">00013</a> LowFirstBitReader(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> &store)<a name="l00014"></a>00014 : m_store(store), m_buffer(0), m_bitsBuffered(0) {}<a name="l00015"></a>00015 <span class="comment">// unsigned long BitsLeft() const {return m_store.MaxRetrievable() * 8 + m_bitsBuffered;}</span><a name="l00016"></a><a class="code" href="class_low_first_bit_reader.html#62533059d5572cf7dfc5bcb7d308bec6">00016</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> BitsBuffered()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_bitsBuffered;}<a name="l00017"></a><a class="code" href="class_low_first_bit_reader.html#e1da4869948bbe34ef63089b0e531bf3">00017</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> PeekBuffer()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_buffer;}<a name="l00018"></a>00018 <span class="keywordtype">bool</span> FillBuffer(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);<a name="l00019"></a>00019 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> PeekBits(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);<a name="l00020"></a>00020 <span class="keywordtype">void</span> SkipBits(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);<a name="l00021"></a>00021 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> GetBits(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);<a name="l00022"></a>00022 <a name="l00023"></a>00023 <span class="keyword">private</span>:<a name="l00024"></a>00024 <a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> &m_store;<a name="l00025"></a>00025 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> m_buffer;<a name="l00026"></a>00026 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_bitsBuffered;<a name="l00027"></a>00027 };<a name="l00028"></a>00028 <a name="l00029"></a>00029 <span class="keyword">struct </span><a class="code" href="struct_code_less_than.html">CodeLessThan</a>;<a name="l00030"></a>00030 <span class="comment"></span><a name="l00031"></a>00031 <span class="comment">//! Huffman Decoder</span><a name="l00032"></a><a class="code" href="class_huffman_decoder.html">00032</a> <span class="comment"></span><span class="keyword">class </span><a class="code" href="class_huffman_decoder.html" title="Huffman Decoder.">HuffmanDecoder</a><a name="l00033"></a>00033 {<a name="l00034"></a>00034 <span class="keyword">public</span>:<a name="l00035"></a><a class="code" href="class_huffman_decoder.html#550cd665357c320af58916f992eb8756">00035</a> <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_huffman_decoder.html#550cd665357c320af58916f992eb8756">code_t</a>;<a name="l00036"></a><a class="code" href="class_huffman_decoder.html#ae2c1dc3110a39ae9d74fc00aee8a1ec">00036</a> <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_huffman_decoder.html#ae2c1dc3110a39ae9d74fc00aee8a1ec">value_t</a>;<a name="l00037"></a><a class="code" href="class_huffman_decoder.html#444758e6ef809d2bf568e4e73cd560d7589d91f9fef801b8b978b95c9eef161b">00037</a> <span class="keyword">enum</span> {<a class="code" href="class_huffman_decoder.html#444758e6ef809d2bf568e4e73cd560d7589d91f9fef801b8b978b95c9eef161b">MAX_CODE_BITS</a> = <span class="keyword">sizeof</span>(<a class="code" href="class_huffman_decoder.html#550cd665357c320af58916f992eb8756">code_t</a>)*8};<a name="l00038"></a>00038 <a name="l00039"></a><a class="code" href="class_huffman_decoder_1_1_err.html#8d7a19c285d2e709945e8c398e173791">00039</a> <span class="keyword">class </span><a class="code" href="class_huffman_decoder_1_1_err.html">Err</a> : <span class="keyword">public</span> <a class="code" href="class_exception.html" title="base class for all exceptions thrown by Crypto++">Exception</a> {<span class="keyword">public</span>: <a class="code" href="class_huffman_decoder_1_1_err.html#8d7a19c285d2e709945e8c398e173791">Err</a>(<span class="keyword">const</span> std::string &<a class="code" href="class_exception.html#dd710fe2bae3ac497ed60393eea35c91">what</a>) : <a class="code" href="class_exception.html#30847048a4b7c9a7aae5e6178964dcfb">Exception</a>(<a class="code" href="class_exception.html#8e53909d979479380e0274807c074c0a3a0352964781e7712b21dbb70ffbe646" title="received input data that doesn't conform to expected format">INVALID_DATA_FORMAT</a>, <span class="stringliteral">"HuffmanDecoder: "</span> + what) {}};<a name="l00040"></a>00040 <a name="l00041"></a><a class="code" href="class_huffman_decoder.html#c3ce28a9e27fe5859de257a80ac0df2d">00041</a> <a class="code" href="class_huffman_decoder.html#c3ce28a9e27fe5859de257a80ac0df2d">HuffmanDecoder</a>() {}<a name="l00042"></a><a class="code" href="class_huffman_decoder.html#e42277c30c16af4ee9f830bc92be8aa8">00042</a> <a class="code" href="class_huffman_decoder.html#c3ce28a9e27fe5859de257a80ac0df2d">HuffmanDecoder</a>(<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *codeBitLengths, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nCodes) {<a class="code" href="class_huffman_decoder.html#66275670f30366de75c3bcb506c657f5">Initialize</a>(codeBitLengths, nCodes);}<a name="l00043"></a>00043 <a name="l00044"></a>00044 <span class="keywordtype">void</span> <a class="code" href="class_huffman_decoder.html#66275670f30366de75c3bcb506c657f5">Initialize</a>(<span class="keyword">const</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *codeBitLengths, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> nCodes);<a name="l00045"></a>00045 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_huffman_decoder.html#32c424a894a24ea4d0aae95c3d30e806">Decode</a>(<a class="code" href="class_huffman_decoder.html#550cd665357c320af58916f992eb8756">code_t</a> code, <span class="comment">/* out */</span> <a class="code" href="class_huffman_decoder.html#ae2c1dc3110a39ae9d74fc00aee8a1ec">value_t</a> &value) <span class="keyword">const</span>;<a name="l00046"></a>00046 <span class="keywordtype">bool</span> <a class="code" href="class_huffman_decoder.html#32c424a894a24ea4d0aae95c3d30e806">Decode</a>(<a class="code" href="class_low_first_bit_reader.html" title="_">LowFirstBitReader</a> &reader, <a class="code" href="class_huffman_decoder.html#ae2c1dc3110a39ae9d74fc00aee8a1ec">value_t</a> &value) <span class="keyword">const</span>;<a name="l00047"></a>00047 <a name="l00048"></a>00048 <span class="keyword">private</span>:<a name="l00049"></a><a class="code" href="class_huffman_decoder.html#c3bc64943c6ab90653d34b0eb5fc3985">00049</a> <span class="keyword">friend</span> <span class="keyword">struct </span><a class="code" href="struct_code_less_than.html">CodeLessThan</a>;<a name="l00050"></a>00050 <a name="l00051"></a>00051 <span class="keyword">struct </span>CodeInfo<a name="l00052"></a>00052 {<a name="l00053"></a>00053 CodeInfo(<a class="code" href="class_huffman_decoder.html#550cd665357c320af58916f992eb8756">code_t</a> code=0, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len=0, <a class="code" href="class_huffman_decoder.html#ae2c1dc3110a39ae9d74fc00aee8a1ec">value_t</a> value=0) : code(code), len(len), value(value) {}<a name="l00054"></a>00054 <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="gf2n_8h.html#f81f67e93bfb8bbb776cab689c83c7e9" title="compares degree">operator<</a>(<span class="keyword">const</span> CodeInfo &rhs)<span class="keyword"> const </span>{<span class="keywordflow">return</span> code < rhs.code;}<a name="l00055"></a>00055 <a class="code" href="class_huffman_decoder.html#550cd665357c320af58916f992eb8756">code_t</a> code;<a name="l00056"></a>00056 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len;<a name="l00057"></a>00057 <a class="code" href="class_huffman_decoder.html#ae2c1dc3110a39ae9d74fc00aee8a1ec">value_t</a> value;<a name="l00058"></a>00058 };<a name="l00059"></a>00059 <a name="l00060"></a>00060 <span class="keyword">struct </span>LookupEntry<a name="l00061"></a>00061 {<a name="l00062"></a>00062 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> type;<a name="l00063"></a>00063 <span class="keyword">union</span><a name="l00064"></a>00064 {<a name="l00065"></a>00065 <a class="code" href="class_huffman_decoder.html#ae2c1dc3110a39ae9d74fc00aee8a1ec">value_t</a> value;<a name="l00066"></a>00066 <span class="keyword">const</span> CodeInfo *begin;<a name="l00067"></a>00067 };⌨️ 快捷键说明
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