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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><html><head><meta http-equiv="Content-Type" content="text/html;charset=iso-8859-1"><title>Crypto++: zinflate.h Source File</title><link href="doxygen.css" rel="stylesheet" type="text/css"></head><body><!-- Generated by Doxygen 1.3.2 --><div class="qindex"><a class="qindex" href="index.html">Main Page</a> | <a class="qindex" href="namespaces.html">Namespace List</a> | <a class="qindex" href="hierarchy.html">Class Hierarchy</a> | <a class="qindex" href="classes.html">Alphabetical List</a> | <a class="qindex" href="annotated.html">Compound List</a> | <a class="qindex" href="files.html">File List</a> | <a class="qindex" href="namespacemembers.html">Namespace Members</a> | <a class="qindex" href="functions.html">Compound Members</a> | <a class="qindex" href="globals.html">File Members</a></div><h1>zinflate.h</h1><div class="fragment"><pre>00001 <span class="preprocessor">#ifndef CRYPTOPP_ZINFLATE_H</span>00002 <span class="preprocessor"></span><span class="preprocessor">#define CRYPTOPP_ZINFLATE_H</span>00003 <span class="preprocessor"></span>00004 <span class="preprocessor">#include "filters.h"</span>00005 <span class="preprocessor">#include <vector></span>00006 00007 NAMESPACE_BEGIN(CryptoPP)00008 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><span class="keyword">class </span><a class="code" href="class_low_first_bit_reader.html">LowFirstBitReader</a>00011 {00012 <span class="keyword">public</span>:00013 <a class="code" href="class_low_first_bit_reader.html">LowFirstBitReader</a>(<a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &store)00014 : m_store(store), m_buffer(0), m_bitsBuffered(0) {}00015 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> BitsLeft()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_store.<a class="code" href="class_buffered_transformation.html#_zlib_decompressorz7_0">MaxRetrievable</a>() * 8 + m_bitsBuffered;}00016 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> BitsBuffered()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_bitsBuffered;}00017 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> PeekBuffer()<span class="keyword"> const </span>{<span class="keywordflow">return</span> m_buffer;}00018 <span class="keywordtype">bool</span> FillBuffer(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);00019 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> PeekBits(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);00020 <span class="keywordtype">void</span> SkipBits(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);00021 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> GetBits(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length);00022 00023 <span class="keyword">private</span>:00024 <a class="code" href="class_buffered_transformation.html">BufferedTransformation</a> &m_store;00025 <span class="keywordtype">unsigned</span> <span class="keywordtype">long</span> m_buffer;00026 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_bitsBuffered;00027 };00028 00029 <span class="keyword">struct </span>CodeLessThan;00030 <span class="comment"></span>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">HuffmanDecoder</a>00033 {00034 <span class="keyword">public</span>:00035 <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> code_t;00036 <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> value_t;00037 <span class="keyword">enum</span> {MAX_CODE_BITS = <span class="keyword">sizeof</span>(code_t)*8};00038 00039 <span class="keyword">class </span>Err : <span class="keyword">public</span> <a class="code" href="class_exception.html">Exception</a> {<span class="keyword">public</span>: Err(<span class="keyword">const</span> std::string &what) : <a class="code" href="class_exception.html">Exception</a>(<a class="code" href="class_exception.html#_zlib_decompressor_1_1_unsupported_preset_dictionaryw7_zlib_decompressor_1_1_unsupported_preset_dictionaryw4">INVALID_DATA_FORMAT</a>, <span class="stringliteral">"HuffmanDecoder: "</span> + what) {}};00040 00041 <a class="code" href="class_huffman_decoder.html">HuffmanDecoder</a>() {}00042 <a class="code" href="class_huffman_decoder.html">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) {Initialize(codeBitLengths, nCodes);}00043 00044 <span class="keywordtype">void</span> Initialize(<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);00045 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> Decode(code_t code, <span class="comment">/* out */</span> value_t &value) <span class="keyword">const</span>;00046 <span class="keywordtype">bool</span> Decode(<a class="code" href="class_low_first_bit_reader.html">LowFirstBitReader</a> &reader, value_t &value) <span class="keyword">const</span>;00047 00048 <span class="keyword">private</span>:00049 <span class="keyword">friend</span> <span class="keyword">struct </span>CodeLessThan;00050 00051 <span class="keyword">struct </span>CodeInfo00052 {00053 CodeInfo(code_t code=0, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len=0, value_t value=0) : code(code), len(len), value(value) {}00054 <span class="keyword">inline</span> <span class="keywordtype">bool</span> operator<(<span class="keyword">const</span> CodeInfo &rhs)<span class="keyword"> const </span>{<span class="keywordflow">return</span> code < rhs.code;}00055 code_t code;00056 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len;00057 value_t value;00058 };00059 00060 <span class="keyword">struct </span>LookupEntry00061 {00062 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> type;00063 <span class="keyword">union</span>00064 <span class="keyword"> </span>{00065 value_t value;00066 <span class="keyword">const</span> CodeInfo *begin;00067 };00068 <span class="keyword">union</span>00069 <span class="keyword"> </span>{00070 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len;00071 <span class="keyword">const</span> CodeInfo *end;00072 };⌨️ 快捷键说明
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