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<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>00013 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>00016 <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>00017 <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>00035 <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> code_t;
<a name="l00036"></a>00036 <span class="keyword">typedef</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> value_t;
<a name="l00037"></a>00037 <span class="keyword">enum</span> {MAX_CODE_BITS = <span class="keyword">sizeof</span>(code_t)*8};
<a name="l00038"></a>00038
<a name="l00039"></a><a class="code" href="class_huffman_decoder_1_1_err.html">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">Err</a>(<span class="keyword">const</span> std::string &what) : <a class="code" href="class_exception.html" title="base class for all exceptions thrown by Crypto++">Exception</a>(<a class="code" href="class_exception.html#a8e53909d979479380e0274807c074c0aa3a0352964781e7712b21dbb70ffbe646" title="received input data that doesn&#39;t conform to expected format">INVALID_DATA_FORMAT</a>, <span class="stringliteral">"HuffmanDecoder: "</span> + what) {}};
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <a class="code" href="class_huffman_decoder.html" title="Huffman Decoder.">HuffmanDecoder</a>() {}
<a name="l00042"></a>00042 <a class="code" href="class_huffman_decoder.html" title="Huffman Decoder.">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);}
<a name="l00043"></a>00043
<a name="l00044"></a>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);
<a name="l00045"></a>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>;
<a name="l00046"></a>00046 <span class="keywordtype">bool</span> Decode(<a class="code" href="class_low_first_bit_reader.html" title="_">LowFirstBitReader</a> &reader, value_t &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>00049 <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(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) {}
<a name="l00054"></a>00054 <span class="keyword">inline</span> <span class="keywordtype">bool</span> <a class="code" href="gf2n_8h.html#abe7b3406821884ed8df76bf9e8266efb" 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 code_t code;
<a name="l00056"></a>00056 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len;
<a name="l00057"></a>00057 value_t 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 value_t value;
<a name="l00066"></a>00066 <span class="keyword">const</span> CodeInfo *begin;
<a name="l00067"></a>00067 };
<a name="l00068"></a>00068 <span class="keyword">union</span>
<a name="l00069"></a>00069 {
<a name="l00070"></a>00070 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> len;
<a name="l00071"></a>00071 <span class="keyword">const</span> CodeInfo *end;
<a name="l00072"></a>00072 };
<a name="l00073"></a>00073 };
<a name="l00074"></a>00074
<a name="l00075"></a>00075 <span class="keyword">static</span> code_t NormalizeCode(code_t code, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> codeBits);
<a name="l00076"></a>00076 <span class="keywordtype">void</span> FillCacheEntry(LookupEntry &entry, code_t normalizedCode) <span class="keyword">const</span>;
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_maxCodeBits, m_cacheBits, m_cacheMask, m_normalizedCacheMask;
<a name="l00079"></a>00079 std::vector<CodeInfo, AllocatorWithCleanup<CodeInfo> > m_codeToValue;
<a name="l00080"></a>00080 <span class="keyword">mutable</span> std::vector<LookupEntry, AllocatorWithCleanup<LookupEntry> > m_cache;
<a name="l00081"></a>00081 };
<a name="l00082"></a>00082 <span class="comment"></span>
<a name="l00083"></a>00083 <span class="comment">//! DEFLATE (RFC 1951) decompressor</span>
<a name="l00084"></a>00084 <span class="comment"></span>
<a name="l00085"></a><a class="code" href="class_inflator.html">00085</a> <span class="keyword">class </span><a class="code" href="class_inflator.html" title="DEFLATE (RFC 1951) decompressor.">Inflator</a> : <span class="keyword">public</span> <a class="code" href="class_auto_signaling.html" title="_">AutoSignaling</a><Filter>
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <span class="keyword">public</span>:
<a name="l00088"></a><a class="code" href="class_inflator_1_1_err.html">00088</a> <span class="keyword">class </span><a class="code" href="class_inflator_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>
<a name="l00089"></a>00089 {
<a name="l00090"></a>00090 <span class="keyword">public</span>:
<a name="l00091"></a>00091 <a class="code" href="class_inflator_1_1_err.html">Err</a>(<a class="code" href="class_exception.html#a8e53909d979479380e0274807c074c0a" title="error types">ErrorType</a> e, <span class="keyword">const</span> std::string &s)
<a name="l00092"></a>00092 : <a class="code" href="class_exception.html" title="base class for all exceptions thrown by Crypto++">Exception</a>(e, s) {}
<a name="l00093"></a>00093 };
<a name="l00094"></a><a class="code" href="class_inflator_1_1_unexpected_end_err.html">00094</a> <span class="keyword">class </span><a class="code" href="class_inflator_1_1_unexpected_end_err.html">UnexpectedEndErr</a> : <span class="keyword">public</span> <a class="code" href="class_inflator_1_1_err.html">Err</a> {<span class="keyword">public</span>: <a class="code" href="class_inflator_1_1_unexpected_end_err.html">UnexpectedEndErr</a>() : <a class="code" href="class_inflator_1_1_err.html">Err</a>(INVALID_DATA_FORMAT, <span class="stringliteral">"Inflator: unexpected end of compressed block"</span>) {}};
<a name="l00095"></a><a class="code" href="class_inflator_1_1_bad_block_err.html">00095</a> <span class="keyword">class </span><a class="code" href="class_inflator_1_1_bad_block_err.html">BadBlockErr</a> : <span class="keyword">public</span> <a class="code" href="class_inflator_1_1_err.html">Err</a> {<span class="keyword">public</span>: <a class="code" href="class_inflator_1_1_bad_block_err.html">BadBlockErr</a>() : <a class="code" href="class_inflator_1_1_err.html">Err</a>(INVALID_DATA_FORMAT, <span class="stringliteral">"Inflator: error in compressed block"</span>) {}};
<a name="l00096"></a>00096 <span class="comment"></span>
<a name="l00097"></a>00097 <span class="comment"> /*! \param repeat decompress multiple compressed streams in series</span>
<a name="l00098"></a>00098 <span class="comment"> \param autoSignalPropagation 0 to turn off MessageEnd signal</span>
<a name="l00099"></a>00099 <span class="comment"> */</span>
<a name="l00100"></a>00100 <a class="code" href="class_inflator.html" title="DEFLATE (RFC 1951) decompressor.">Inflator</a>(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> *attachment = NULL, <span class="keywordtype">bool</span> repeat = <span class="keyword">false</span>, <span class="keywordtype">int</span> autoSignalPropagation = -1);
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="keywordtype">void</span> IsolatedInitialize(<span class="keyword">const</span> <a class="code" href="class_name_value_pairs.html" title="interface for retrieving values given their names">NameValuePairs</a> &parameters);
<a name="l00103"></a>00103 <span class="keywordtype">size_t</span> Put2(<span class="keyword">const</span> byte *inString, <span class="keywordtype">size_t</span> length, <span class="keywordtype">int</span> messageEnd, <span class="keywordtype">bool</span> blocking);
<a name="l00104"></a>00104 <span class="keywordtype">bool</span> IsolatedFlush(<span class="keywordtype">bool</span> hardFlush, <span class="keywordtype">bool</span> blocking);
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> GetLog2WindowSize()<span class="keyword"> const </span>{<span class="keywordflow">return</span> 15;}
<a name="l00107"></a>00107
<a name="l00108"></a>00108 <span class="keyword">protected</span>:
<a name="l00109"></a>00109 <a class="code" href="class_byte_queue.html" title="Byte Queue.">ByteQueue</a> m_inQueue;
<a name="l00110"></a>00110
<a name="l00111"></a>00111 <span class="keyword">private</span>:
<a name="l00112"></a>00112 <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> MaxPrestreamHeaderSize()<span class="keyword"> const </span>{<span class="keywordflow">return</span> 0;}
<a name="l00113"></a>00113 <span class="keyword">virtual</span> <span class="keywordtype">void</span> ProcessPrestreamHeader() {}
<a name="l00114"></a>00114 <span class="keyword">virtual</span> <span class="keywordtype">void</span> ProcessDecompressedData(<span class="keyword">const</span> byte *<span class="keywordtype">string</span>, <span class="keywordtype">size_t</span> length)
<a name="l00115"></a>00115 {AttachedTransformation()->Put(<span class="keywordtype">string</span>, length);}
<a name="l00116"></a>00116 <span class="keyword">virtual</span> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> MaxPoststreamTailSize()<span class="keyword"> const </span>{<span class="keywordflow">return</span> 0;}
<a name="l00117"></a>00117 <span class="keyword">virtual</span> <span class="keywordtype">void</span> ProcessPoststreamTail() {}
<a name="l00118"></a>00118
<a name="l00119"></a>00119 <span class="keywordtype">void</span> ProcessInput(<span class="keywordtype">bool</span> flush);
<a name="l00120"></a>00120 <span class="keywordtype">void</span> DecodeHeader();
<a name="l00121"></a>00121 <span class="keywordtype">bool</span> DecodeBody();
<a name="l00122"></a>00122 <span class="keywordtype">void</span> FlushOutput();
<a name="l00123"></a>00123 <span class="keywordtype">void</span> OutputByte(byte b);
<a name="l00124"></a>00124 <span class="keywordtype">void</span> OutputString(<span class="keyword">const</span> byte *<span class="keywordtype">string</span>, <span class="keywordtype">size_t</span> length);
<a name="l00125"></a>00125 <span class="keywordtype">void</span> OutputPast(<span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> length, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> distance);
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="class_huffman_decoder.html" title="Huffman Decoder.">HuffmanDecoder</a> *FixedLiteralDecoder();
<a name="l00128"></a>00128 <span class="keyword">static</span> <span class="keyword">const</span> <a class="code" href="class_huffman_decoder.html" title="Huffman Decoder.">HuffmanDecoder</a> *FixedDistanceDecoder();
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="keyword">const</span> <a class="code" href="class_huffman_decoder.html" title="Huffman Decoder.">HuffmanDecoder</a>& GetLiteralDecoder() <span class="keyword">const</span>;
<a name="l00131"></a>00131 <span class="keyword">const</span> <a class="code" href="class_huffman_decoder.html" title="Huffman Decoder.">HuffmanDecoder</a>& GetDistanceDecoder() <span class="keyword">const</span>;
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <span class="keyword">enum</span> State {PRE_STREAM, WAIT_HEADER, DECODING_BODY, POST_STREAM, AFTER_END};
<a name="l00134"></a>00134 State m_state;
<a name="l00135"></a>00135 <span class="keywordtype">bool</span> m_repeat, m_eof, m_wrappedAround;
<a name="l00136"></a>00136 byte m_blockType;
<a name="l00137"></a>00137 word16 m_storedLen;
<a name="l00138"></a>00138 <span class="keyword">enum</span> NextDecode {LITERAL, LENGTH_BITS, DISTANCE, DISTANCE_BITS};
<a name="l00139"></a>00139 NextDecode m_nextDecode;
<a name="l00140"></a>00140 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> m_literal, m_distance; <span class="comment">// for LENGTH_BITS or DISTANCE_BITS</span>
<a name="l00141"></a>00141 <a class="code" href="class_huffman_decoder.html" title="Huffman Decoder.">HuffmanDecoder</a> m_dynamicLiteralDecoder, m_dynamicDistanceDecoder;
<a name="l00142"></a>00142 <a class="code" href="class_low_first_bit_reader.html" title="_">LowFirstBitReader</a> m_reader;
<a name="l00143"></a>00143 <a class="code" href="class_sec_block.html" title="a block of memory allocated using A">SecByteBlock</a> m_window;
<a name="l00144"></a>00144 <span class="keywordtype">size_t</span> m_current, m_lastFlush;
<a name="l00145"></a>00145 };
<a name="l00146"></a>00146
<a name="l00147"></a>00147 NAMESPACE_END
<a name="l00148"></a>00148
<a name="l00149"></a>00149 <span class="preprocessor">#endif</span>
</pre></div></div>
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