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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++: gzip.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>gzip.h</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="preprocessor">#ifndef CRYPTOPP_GZIP_H</span><a name="l00002"></a>00002 <span class="preprocessor"></span><span class="preprocessor">#define CRYPTOPP_GZIP_H</span><a name="l00003"></a>00003 <span class="preprocessor"></span><a name="l00004"></a>00004 <span class="preprocessor">#include "zdeflate.h"</span><a name="l00005"></a>00005 <span class="preprocessor">#include "zinflate.h"</span><a name="l00006"></a>00006 <span class="preprocessor">#include "crc.h"</span><a name="l00007"></a>00007 <a name="l00008"></a>00008 NAMESPACE_BEGIN(CryptoPP)<a name="l00009"></a>00009 <a name="l00010"></a>00010 <span class="comment">/// GZIP Compression (RFC 1952)</span><a name="l00011"></a><a class="code" href="class_gzip.html">00011</a> <span class="comment"></span>class <a class="code" href="class_gzip.html" title="GZIP Compression (RFC 1952).">Gzip</a> : public <a class="code" href="class_deflator.html" title="DEFLATE (RFC 1951) compressor.">Deflator</a><a name="l00012"></a>00012 {<a name="l00013"></a>00013 <span class="keyword">public</span>:<a name="l00014"></a><a class="code" href="class_gzip.html#1d1b762af2a7ae5053e2870ef57e313b">00014</a> <a class="code" href="class_gzip.html" title="GZIP Compression (RFC 1952).">Gzip</a>(<a class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> *attachment=NULL, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> deflateLevel=DEFAULT_DEFLATE_LEVEL, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> log2WindowSize=DEFAULT_LOG2_WINDOW_SIZE, <span class="keywordtype">bool</span> detectUncompressible=<span class="keyword">true</span>)<a name="l00015"></a>00015 : Deflator(attachment, deflateLevel, log2WindowSize, detectUncompressible) {}<a name="l00016"></a><a class="code" href="class_gzip.html#d5db66366a8337baa0bb39402e6e6d73">00016</a> <a class="code" href="class_gzip.html" title="GZIP Compression (RFC 1952).">Gzip</a>(<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 class="code" href="class_buffered_transformation.html" title="interface for buffered transformations">BufferedTransformation</a> *attachment=NULL)<a name="l00017"></a>00017 : Deflator(parameters, attachment) {}<a name="l00018"></a>00018 <a name="l00019"></a>00019 <span class="keyword">protected</span>:<a name="l00020"></a><a class="code" href="class_gzip.html#3901fbf5ea0328610a5e8effb1445627e2383dd6c55ed39420209469566ac128">00020</a> <span class="keyword">enum</span> {MAGIC1=0x1f, MAGIC2=0x8b, <span class="comment">// flags for the header</span><a name="l00021"></a><a class="code" href="class_gzip.html#3901fbf5ea0328610a5e8effb1445627480a6f4679f4252868bec5068bcf31bc">00021</a> DEFLATED=8, FAST=4, SLOW=2};<a name="l00022"></a>00022 <a name="l00023"></a>00023 <span class="keywordtype">void</span> WritePrestreamHeader();<a name="l00024"></a>00024 <span class="keywordtype">void</span> ProcessUncompressedData(<span class="keyword">const</span> byte *<span class="keywordtype">string</span>, <span class="keywordtype">size_t</span> length);<a name="l00025"></a>00025 <span class="keywordtype">void</span> WritePoststreamTail();<a name="l00026"></a>00026 <a name="l00027"></a><a class="code" href="class_gzip.html#0020bd0aa27e3335993e4ea2836e5295">00027</a> word32 m_totalLen;<a name="l00028"></a><a class="code" href="class_gzip.html#4f297733a60374b3f7a7d5ef2dc10c2a">00028</a> <a class="code" href="class_c_r_c32.html" title="CRC Checksum Calculation.">CRC32</a> m_crc;<a name="l00029"></a>00029 };<a name="l00030"></a>00030 <span class="comment"></span><a name="l00031"></a>00031 <span class="comment">/// GZIP Decompression (RFC 1952)</span><a name="l00032"></a><a class="code" href="class_gunzip.html">00032</a> <span class="comment"></span><span class="keyword">class </span><a class="code" href="class_gunzip.html" title="GZIP Decompression (RFC 1952).">Gunzip</a> : <span class="keyword">public</span> <a class="code" href="class_inflator.html" title="DEFLATE (RFC 1951) decompressor.">Inflator</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_gunzip.html#8fb9515d8a5f03dc0ff1f8df25b9734c">00035</a> <span class="keyword">typedef</span> <a class="code" href="class_inflator_1_1_err.html">Inflator::Err</a> <a class="code" href="class_inflator_1_1_err.html">Err</a>;<a name="l00036"></a><a class="code" href="class_gunzip_1_1_header_err.html#858c1ab4e5f647ca9e5f269b90a0f5bc">00036</a> <span class="keyword">class </span><a class="code" href="class_gunzip_1_1_header_err.html">HeaderErr</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_gunzip_1_1_header_err.html#858c1ab4e5f647ca9e5f269b90a0f5bc">HeaderErr</a>() : <a class="code" href="class_inflator_1_1_err.html#5b05977af50a38a468e65abb27be2cea">Err</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">"Gunzip: header decoding error"</span>) {}};<a name="l00037"></a><a class="code" href="class_gunzip_1_1_tail_err.html#c253deed932ec16bb661d670f4fcaa90">00037</a> <span class="keyword">class </span><a class="code" href="class_gunzip_1_1_tail_err.html">TailErr</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_gunzip_1_1_tail_err.html#c253deed932ec16bb661d670f4fcaa90">TailErr</a>() : <a class="code" href="class_inflator_1_1_err.html#5b05977af50a38a468e65abb27be2cea">Err</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">"Gunzip: tail too short"</span>) {}};<a name="l00038"></a><a class="code" href="class_gunzip_1_1_crc_err.html#e07d73c670517f838bff0581d7a372e0">00038</a> <span class="keyword">class </span><a class="code" href="class_gunzip_1_1_crc_err.html">CrcErr</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_gunzip_1_1_crc_err.html#e07d73c670517f838bff0581d7a372e0">CrcErr</a>() : <a class="code" href="class_inflator_1_1_err.html#5b05977af50a38a468e65abb27be2cea">Err</a>(<a class="code" href="class_exception.html#8e53909d979479380e0274807c074c0a77a639a803cf53052f9c76a0354247e6" title="data integerity check (such as CRC or MAC) failed">DATA_INTEGRITY_CHECK_FAILED</a>, <span class="stringliteral">"Gunzip: CRC check error"</span>) {}};<a name="l00039"></a><a class="code" href="class_gunzip_1_1_length_err.html#1d3ecd95e6b76b1f79e57e512785a8ff">00039</a> <span class="keyword">class </span><a class="code" href="class_gunzip_1_1_length_err.html">LengthErr</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_gunzip_1_1_length_err.html#1d3ecd95e6b76b1f79e57e512785a8ff">LengthErr</a>() : <a class="code" href="class_inflator_1_1_err.html#5b05977af50a38a468e65abb27be2cea">Err</a>(<a class="code" href="class_exception.html#8e53909d979479380e0274807c074c0a77a639a803cf53052f9c76a0354247e6" title="data integerity check (such as CRC or MAC) failed">DATA_INTEGRITY_CHECK_FAILED</a>, <span class="stringliteral">"Gunzip: length check error"</span>) {}};<a name="l00040"></a>00040 <span class="comment"></span><a name="l00041"></a>00041 <span class="comment"> /*! \param repeat decompress multiple compressed streams in series</span><a name="l00042"></a>00042 <span class="comment"> \param autoSignalPropagation 0 to turn off MessageEnd signal</span><a name="l00043"></a>00043 <span class="comment"> */</span><a name="l00044"></a>00044 <a class="code" href="class_gunzip.html#30ad6514a475206a6b60ccf81693323b">Gunzip</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="l00045"></a>00045 <a name="l00046"></a>00046 <span class="keyword">protected</span>:<a name="l00047"></a><a class="code" href="class_gunzip.html#3a1bd53a5c9cf22b2b82bbec1a7b2ed6faf7e034e2ac854a6727c4c0e29178ec">00047</a> <span class="keyword">enum</span> {<a class="code" href="class_gunzip.html#3a1bd53a5c9cf22b2b82bbec1a7b2ed6dc332acd621ea2d23366eba10786818a">MAGIC1</a>=0x1f, <a class="code" href="class_gunzip.html#3a1bd53a5c9cf22b2b82bbec1a7b2ed6faf7e034e2ac854a6727c4c0e29178ec">MAGIC2</a>=0x8b, <span class="comment">// flags for the header</span><a name="l00048"></a><a class="code" href="class_gunzip.html#3a1bd53a5c9cf22b2b82bbec1a7b2ed6ba446f0f4f5fb382e1c6dfd356d62ca8">00048</a> <a class="code" href="class_gunzip.html#3a1bd53a5c9cf22b2b82bbec1a7b2ed6ba446f0f4f5fb382e1c6dfd356d62ca8">DEFLATED</a>=8};<a name="l00049"></a>00049 <a name="l00050"></a><a class="code" href="class_gunzip.html#ecff9a444d3d825b8faeb5bf426c8bff">00050</a> <span class="keyword">enum</span> <a class="code" href="class_gunzip.html#ecff9a444d3d825b8faeb5bf426c8bff">FLAG_MASKS</a> {<a name="l00051"></a><a class="code" href="class_gunzip.html#ecff9a444d3d825b8faeb5bf426c8bffbd26aa59bee221311da649a0e5c5f00d">00051</a> <a class="code" href="class_gunzip.html#ecff9a444d3d825b8faeb5bf426c8bff132e5c1e49cd7878441067791d996ed7">CONTINUED</a>=2, <a class="code" href="class_gunzip.html#ecff9a444d3d825b8faeb5bf426c8bff91314eaa2aa635a806f10a1c68f965b0">EXTRA_FIELDS</a>=4, <a class="code" href="class_gunzip.html#ecff9a444d3d825b8faeb5bf426c8bffbd26aa59bee221311da649a0e5c5f00d">FILENAME</a>=8, <a class="code" href="class_gunzip.html#ecff9a444d3d825b8faeb5bf426c8bff22c83752237f4782d25e2937425d906d">COMMENTS</a>=16, <a class="code" href="class_gunzip.html#ecff9a444d3d825b8faeb5bf426c8bffd1f340354afbc2c92b0adf4985fbe530">ENCRYPTED</a>=32};<a name="l00052"></a>00052 <a name="l00053"></a><a class="code" href="class_gunzip.html#a49bcb8c99fb83b72e323cad51e18ebf">00053</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_gunzip.html#a49bcb8c99fb83b72e323cad51e18ebf">MaxPrestreamHeaderSize</a>()<span class="keyword"> const </span>{<span class="keywordflow">return</span> 1024;}<a name="l00054"></a>00054 <span class="keywordtype">void</span> <a class="code" href="class_gunzip.html#698e33204628059569f5206bc48874d7">ProcessPrestreamHeader</a>();<a name="l00055"></a>00055 <span class="keywordtype">void</span> <a class="code" href="class_gunzip.html#360055a74a55ba685743c0a1d3fefe3e">ProcessDecompressedData</a>(<span class="keyword">const</span> byte *<span class="keywordtype">string</span>, <span class="keywordtype">size_t</span> length);<a name="l00056"></a><a class="code" href="class_gunzip.html#e40fbf7de72705fd33bf7f59f29a732e">00056</a> <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> <a class="code" href="class_gunzip.html#e40fbf7de72705fd33bf7f59f29a732e">MaxPoststreamTailSize</a>()<span class="keyword"> const </span>{<span class="keywordflow">return</span> 8;}<a name="l00057"></a>00057 <span class="keywordtype">void</span> <a class="code" href="class_gunzip.html#bf4c4fa9c6ed7bfffe5cbe27822efd2e">ProcessPoststreamTail</a>();<a name="l00058"></a>00058 <a name="l00059"></a><a class="code" href="class_gunzip.html#cc88661126feb496126224c5157b387a">00059</a> word32 <a class="code" href="class_gunzip.html#cc88661126feb496126224c5157b387a">m_length</a>;<a name="l00060"></a><a class="code" href="class_gunzip.html#e59bb25e5259b983acf79188199d595d">00060</a> <a class="code" href="class_c_r_c32.html" title="CRC Checksum Calculation.">CRC32</a> <a class="code" href="class_gunzip.html#e59bb25e5259b983acf79188199d595d">m_crc</a>;<a name="l00061"></a>00061 };<a name="l00062"></a>00062 <a name="l00063"></a>00063 NAMESPACE_END<a name="l00064"></a>00064 <a name="l00065"></a>00065 <span class="preprocessor">#endif</span></pre></div><hr size="1"><address style="text-align: right;"><small>Generated on Fri Jun 1 11:11:21 2007 for Crypto++ by <a href="http://www.doxygen.org/index.html"><img src="doxygen.png" alt="doxygen" align="middle" border="0"></a> 1.5.2 </small></address></body></html>⌨️ 快捷键说明
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