<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>Barry: cod.cc Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.6.2-20100208 -->
<div class="navigation" id="top">
<div class="tabs">
<ul>
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="modules.html"><span>Modules</span></a></li>
<li><a href="namespaces.html"><span>Namespaces</span></a></li>
<li><a href="annotated.html"><span>Classes</span></a></li>
<li class="current"><a href="files.html"><span>Files</span></a></li>
<li><a href="dirs.html"><span>Directories</span></a></li>
</ul>
</div>
<div class="tabs">
<ul>
<li><a href="files.html"><span>File List</span></a></li>
</ul>
</div>
<div class="navpath"><a class="el" href="dir_65781e9408669bb8d7d9c025fdb5fe86.html">src</a>
</div>
</div>
<div class="contents">
<h1>cod.cc</h1><a href="cod_8cc.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">///</span>
<a name="l00002"></a>00002 <span class="comment"></span><span class="comment">/// \file cod.cc</span>
<a name="l00003"></a>00003 <span class="comment"></span><span class="comment">/// COD file API</span>
<a name="l00004"></a>00004 <span class="comment"></span><span class="comment">///</span>
<a name="l00005"></a>00005 <span class="comment"></span>
<a name="l00006"></a>00006 <span class="comment">/*</span>
<a name="l00007"></a>00007 <span class="comment"> Copyright (C) 2009-2010, Net Direct Inc. (http://www.netdirect.ca/)</span>
<a name="l00008"></a>00008 <span class="comment"> Copyright (C) 2008-2009, Nicolas VIVIEN</span>
<a name="l00009"></a>00009 <span class="comment"> Copyright (C) 2009, Josh Kropf</span>
<a name="l00010"></a>00010 <span class="comment"></span>
<a name="l00011"></a>00011 <span class="comment"> This program is free software; you can redistribute it and/or modify</span>
<a name="l00012"></a>00012 <span class="comment"> it under the terms of the GNU General Public License as published by</span>
<a name="l00013"></a>00013 <span class="comment"> the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00014"></a>00014 <span class="comment"> (at your option) any later version.</span>
<a name="l00015"></a>00015 <span class="comment"></span>
<a name="l00016"></a>00016 <span class="comment"> This program is distributed in the hope that it will be useful,</span>
<a name="l00017"></a>00017 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00018"></a>00018 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.</span>
<a name="l00019"></a>00019 <span class="comment"></span>
<a name="l00020"></a>00020 <span class="comment"> See the GNU General Public License in the COPYING file at the</span>
<a name="l00021"></a>00021 <span class="comment"> root directory of this project for more details.</span>
<a name="l00022"></a>00022 <span class="comment">*/</span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="cod_8h.html" title="COD file API.">cod.h</a>"</span>
<a name="l00025"></a>00025 <span class="preprocessor">#include "<a class="code" href="cod-internal_8h.html" title="COD structure.">cod-internal.h</a>"</span>
<a name="l00026"></a>00026 <span class="preprocessor">#include "<a class="code" href="error_8h.html" title="Common exception classes for the Barry library.">error.h</a>"</span>
<a name="l00027"></a>00027 <span class="preprocessor">#include "<a class="code" href="endian_8h.html" title="Endian conversion macros.">endian.h</a>"</span>
<a name="l00028"></a>00028 <span class="preprocessor">#include <config.h></span>
<a name="l00029"></a>00029 <span class="preprocessor">#include <sys/types.h></span>
<a name="l00030"></a>00030 <span class="preprocessor">#include <sys/stat.h></span>
<a name="l00031"></a>00031 <span class="preprocessor">#include <unistd.h></span>
<a name="l00032"></a>00032 <span class="preprocessor">#include <string></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <string.h></span>
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="preprocessor">#ifdef HAVE_ZLIB</span>
<a name="l00036"></a>00036 <span class="preprocessor"></span><span class="preprocessor"> #include <zlib.h></span>
<a name="l00037"></a>00037 <span class="preprocessor">#endif</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span>
<a name="l00039"></a>00039 <span class="keyword">using namespace </span>std;
<a name="l00040"></a>00040
<a name="l00041"></a>00041 <span class="keyword">namespace </span>Barry {
<a name="l00042"></a>00042
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="keywordtype">size_t</span> <a class="code" href="namespaceBarry.html#a07808b7a4cabe1399d5432eb1ee1eabf" title="Seeks the input stream to the next packed sibling .cod file and returns the packed...">SeekNextCod</a>(std::istream &input)
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046 <span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> codtype_simple[] = CODFILE_TYPE_SIMPLE;
<a name="l00047"></a>00047 <span class="keywordtype">char</span> codtype_pkzip[] = CODFILE_TYPE_PKZIP;
<a name="l00048"></a>00048 <span class="keywordtype">char</span> local_file_sig[] = PKZIP_LOCAL_FILE_SIG;
<a name="l00049"></a>00049 <span class="keywordtype">char</span> directory_sig[] = PKZIP_DIRECTORY_SIG;
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="keywordtype">char</span> signature[4];
<a name="l00052"></a>00052
<a name="l00053"></a>00053 <span class="comment">// finished reading stream containing single cod file</span>
<a name="l00054"></a>00054 input.peek();
<a name="l00055"></a>00055 <span class="keywordflow">if</span>( input.eof() ) {
<a name="l00056"></a>00056 <span class="keywordflow">return</span> 0;
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 <span class="keywordflow">if</span>( input.read(signature, <span class="keyword">sizeof</span>(signature)).eof() ) {
<a name="l00060"></a>00060 <span class="keywordflow">throw</span> Error(<span class="stringliteral">"SeekNextCod: EOF while reading file signature"</span>);
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordflow">if</span>( memcmp(signature, codtype_pkzip, <span class="keyword">sizeof</span>(codtype_pkzip)) == 0 ) {
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="keywordflow">if</span>( memcmp(signature, local_file_sig, <span class="keyword">sizeof</span>(signature)) == 0 ) {
<a name="l00066"></a>00066 <a class="code" href="structBXLOCAL.html">pkzip_local_header_t</a> header;
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="keywordflow">if</span>( input.read((<span class="keywordtype">char</span> *)&header, <span class="keyword">sizeof</span>(<a class="code" href="structBXLOCAL.html">pkzip_local_header_t</a>)).eof() ) {
<a name="l00069"></a>00069 <span class="keywordflow">throw</span> Error(<span class="stringliteral">"SeekNextCod: EOF while reading PKZIP header"</span>);
<a name="l00070"></a>00070 }
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <span class="comment">// skip cod file name and extra field, we don't need them</span>
<a name="l00073"></a>00073 <span class="keywordtype">size_t</span> skip_len = header.file_name_length + header.extra_field_length;
<a name="l00074"></a>00074 <span class="keywordflow">if</span>( input.ignore(skip_len).eof() ) {
<a name="l00075"></a>00075 <span class="keywordflow">throw</span> Error(<span class="stringliteral">"SeekNextCod: EOF while skipping unused fields"</span>);
<a name="l00076"></a>00076 }
<a name="l00077"></a>00077
<a name="l00078"></a>00078 <span class="keywordflow">return</span> btohl(header.compressed_size);
<a name="l00079"></a>00079 }
<a name="l00080"></a>00080 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( memcmp(signature, directory_sig, <span class="keyword">sizeof</span>(signature)) == 0 ) {
<a name="l00081"></a>00081 <span class="comment">// done reading when central directory is reached</span>
<a name="l00082"></a>00082 <span class="keywordflow">return</span> 0;
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085 <span class="keywordflow">else</span> <span class="keywordflow">if</span>( memcmp(signature, codtype_simple, <span class="keyword">sizeof</span>(codtype_simple)) == 0 ) {
<a name="l00086"></a>00086 <span class="comment">// find and return size of cod file</span>
<a name="l00087"></a>00087 <span class="keywordflow">if</span>( input.seekg(0, ios::end).fail() ) {
<a name="l00088"></a>00088 <span class="keywordflow">throw</span> Error(<span class="stringliteral">"SeekNextCod: seek to end failed"</span>);
<a name="l00089"></a>00089 }
<a name="l00090"></a>00090
<a name="l00091"></a>00091 uint32_t size = input.tellg();
<a name="l00092"></a>00092
<a name="l00093"></a>00093 <span class="keywordflow">if</span>( input.seekg(0, ios::beg).fail() ) {
<a name="l00094"></a>00094 <span class="keywordflow">throw</span> Error(<span class="stringliteral">"SeekNextCod: seek to start failed"</span>);
<a name="l00095"></a>00095 }
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="keywordflow">return</span> size;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 <span class="keywordflow">else</span> {
<a name="l00100"></a>00100 <span class="keywordflow">throw</span> Error(<span class="stringliteral">"SeekNextCod: unknown COD file signature"</span>);
<a name="l00101"></a>00101 }
<a name="l00102"></a>00102
<a name="l00103"></a>00103 <span class="keywordflow">return</span> 0;
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105
<a name="l00106"></a>00106
<a name="l00107"></a>00107 CodFileBuilder::CodFileBuilder(<span class="keyword">const</span> std::string &module_name, <span class="keywordtype">size_t</span> module_count)
<a name="l00108"></a>00108 : m_module_name(module_name)
<a name="l00109"></a>00109 , m_module_count(module_count)
<a name="l00110"></a>00110 , m_current_module(0)
<a name="l00111"></a>00111 {
<a name="l00112"></a>00112 }
<a name="l00113"></a>00113
<a name="l00114"></a>00114 CodFileBuilder::~CodFileBuilder()
<a name="l00115"></a>00115 {
<a name="l00116"></a>00116 }
<a name="l00117"></a>00117
<a name="l00118"></a><a class="code" href="classBarry_1_1CodFileBuilder.html#a22fd9fb2aaed92b0b6ae427a9b90e9ad">00118</a> <span class="keywordtype">void</span> <a class="code" href="classBarry_1_1CodFileBuilder.html#a22fd9fb2aaed92b0b6ae427a9b90e9ad" title="Writes packed .cod file header to the output stream, and appends an entry to the...">CodFileBuilder::WriteNextHeader</a>(std::ostream &output, <span class="keyword">const</span> uint8_t* module_buffer, uint32_t module_size)
<a name="l00119"></a>00119 {
<a name="l00120"></a>00120 <span class="comment">// ignored for single module .cod files (simple .cod file)</span>
<a name="l00121"></a>00121 <span class="keywordflow">if</span>( m_module_count == 1 ) {
<a name="l00122"></a>00122 <span class="keywordflow">return</span>;
<a name="l00123"></a>00123 }
<a name="l00124"></a>00124
<a name="l00125"></a>00125 <span class="comment">// 32bit CRC of module in file header and directory entry</span>
<a name="l00126"></a>00126 <span class="comment">// using zero for CRC will result in warnings when inflating .cod file</span>
<a name="l00127"></a>00127 uint32_t crc = 0;
<a name="l00128"></a>00128
<a name="l00129"></a>00129 <span class="preprocessor">#ifdef HAVE_ZLIB</span>
<a name="l00130"></a>00130 <span class="preprocessor"></span> crc = crc32(0, NULL, module_size);
<a name="l00131"></a>00131 crc = crc32(crc, module_buffer, module_size);
<a name="l00132"></a>00132 <span class="preprocessor">#endif</span>
<a name="l00133"></a>00133 <span class="preprocessor"></span>
<a name="l00134"></a>00134 <span class="comment">// .cod file name for siblings have hyphenated index number, name-1.cod</span>
<a name="l00135"></a>00135 std::ostringstream file_name(m_module_name, ios::app);
<a name="l00136"></a>00136 <span class="keywordflow">if</span>( m_current_module == 0 )
<a name="l00137"></a>00137 file_name << <span class="stringliteral">".cod"</span>;
<a name="l00138"></a>00138 <span class="keywordflow">else</span>
<a name="l00139"></a>00139 file_name << <span class="stringliteral">"-"</span> << m_current_module << <span class="stringliteral">".cod"</span>;
<a name="l00140"></a>00140
<a name="l00141"></a>00141 <span class="comment">// current stream pointer is relative offset to start of file entry</span>
<a name="l00142"></a>00142 uint32_t entry_offset = output.tellp();
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="comment">// structures for the local file entry and central directory entry</span>
<a name="l00145"></a>00145 <a class="code" href="structBXLOCAL.html">pkzip_local_header_t</a> header;
<a name="l00146"></a>00146 <a class="code" href="structBXLOCAL.html">pkzip_directory_t</a> entry;
<a name="l00147"></a>00147
<a name="l00148"></a>00148 <span class="comment">// zero both structs, most fields are zero</span>
<a name="l00149"></a>00149 memset(&header, 0, <span class="keyword">sizeof</span>(<a class="code" href="structBXLOCAL.html">pkzip_local_header_t</a>));
<a name="l00150"></a>00150 memset(&entry, 0, <span class="keyword">sizeof</span>(<a class="code" href="structBXLOCAL.html">pkzip_directory_t</a>));
<a name="l00151"></a>00151
<a name="l00152"></a>00152 <span class="keywordtype">char</span> header_sig[] = PKZIP_LOCAL_FILE_SIG;
<a name="l00153"></a>00153 output.write(header_sig, <span class="keyword">sizeof</span>(header_sig));
<a name="l00154"></a>00154
<a name="l00155"></a>00155 <span class="comment">// version is always 0x00A0 = 'Windows NTFS'</span>
<a name="l00156"></a>00156 header.version_needed = htobs(10);
<a name="l00157"></a>00157
<a name="l00158"></a>00158 <span class="comment">// time and date fields seem to randomly have invalid or fixed values</span>
<a name="l00159"></a>00159 <span class="comment">// just leave them as zero</span>
<a name="l00160"></a>00160 <span class="comment">//header.last_mod_time</span>
<a name="l00161"></a>00161 <span class="comment">//header.last_mod_date</span>
<a name="l00162"></a>00162
<a name="l00163"></a>00163 header.crc_32 = htobl(crc);
<a name="l00164"></a>00164 header.compressed_size = htobl(module_size);
<a name="l00165"></a>00165 header.uncompressed_size = htobl(module_size);
<a name="l00166"></a>00166 header.file_name_length = htobs(file_name.str().length());
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="comment">// the very first cod sibling to be written has an extra field</span>
<a name="l00169"></a>00169 <span class="comment">// length equal to 4, with all zeros in the field itself</span>
<a name="l00170"></a>00170 <span class="comment">// all subsequent siblings have a zero length extra field</span>
<a name="l00171"></a>00171 <span class="comment">//header.extra_field_length = htobs(4);</span>
<a name="l00172"></a>00172
<a name="l00173"></a>00173 output.write((<span class="keywordtype">char</span> *)&header, <span class="keyword">sizeof</span>(<a class="code" href="structBXLOCAL.html">pkzip_local_header_t</a>));
<a name="l00174"></a>00174 output << file_name.str();
<a name="l00175"></a>00175
<a name="l00176"></a>00176 <span class="keywordtype">char</span> footer_sig[] = PKZIP_DIRECTORY_SIG;
<a name="l00177"></a>00177
<a name="l00178"></a>00178 <span class="comment">// version is always 0x00A0 = 'Windows NTFS'</span>
<a name="l00179"></a>00179 entry.version_madeby = htobs(10);
<a name="l00180"></a>00180 entry.version_needed = htobs(10);
<a name="l00181"></a>00181
<a name="l00182"></a>00182 entry.crc_32 = htobl(crc);
<a name="l00183"></a>00183 entry.compressed_size = htobl(module_size);
<a name="l00184"></a>00184 entry.uncompressed_size = htobl(module_size);
<a name="l00185"></a>00185 entry.file_name_length = htobs(file_name.str().length());
<a name="l00186"></a>00186 entry.relative_offset = htobl(entry_offset);
<a name="l00187"></a>00187
<a name="l00188"></a>00188 m_directory.write(footer_sig, <span class="keyword">sizeof</span>(footer_sig));
<a name="l00189"></a>00189 m_directory.write((<span class="keywordtype">char</span>*)&entry, <span class="keyword">sizeof</span>(<a class="code" href="structBXLOCAL.html">pkzip_directory_t</a>));
<a name="l00190"></a>00190 m_directory << file_name.str();
<a name="l00191"></a>00191
<a name="l00192"></a>00192 m_current_module ++;
<a name="l00193"></a>00193 }
<a name="l00194"></a>00194
<a name="l00195"></a><a class="code" href="classBarry_1_1CodFileBuilder.html#a5897a4fe8ef826ddf58e045d5b3513ec">00195</a> <span class="keywordtype">void</span> <a class="code" href="classBarry_1_1CodFileBuilder.html#a5897a4fe8ef826ddf58e045d5b3513ec" title="Write the central directory and central directory ending indicator to the output...">CodFileBuilder::WriteFooter</a>(std::ostream &output)
<a name="l00196"></a>00196 {
<a name="l00197"></a>00197 <span class="comment">// ignored for single module .cod files (simple .cod file)</span>
<a name="l00198"></a>00198 <span class="keywordflow">if</span>( m_module_count == 1 ) {
<a name="l00199"></a>00199 <span class="keywordflow">return</span>;
<a name="l00200"></a>00200 }
<a name="l00201"></a>00201
<a name="l00202"></a>00202 <a class="code" href="structBXLOCAL.html">pkzip_end_directory_t</a> end;
<a name="l00203"></a>00203 memset(&end, 0, <span class="keyword">sizeof</span>(<a class="code" href="structBXLOCAL.html">pkzip_end_directory_t</a>));
<a name="l00204"></a>00204
<a name="l00205"></a>00205 end.this_disk_entry_count = htobs(m_current_module);
<a name="l00206"></a>00206 end.total_entry_count = htobs(m_current_module);
<a name="l00207"></a>00207 end.directory_length = htobl(m_directory.str().length());
<a name="l00208"></a>00208
<a name="l00209"></a>00209 <span class="comment">// current stream pointer is relative offset to start of directory</span>
<a name="l00210"></a>00210 end.directory_offset = output.tellp();
<a name="l00211"></a>00211
<a name="l00212"></a>00212 <span class="keywordtype">char</span> sig[] = PKZIP_END_DIRECTORY_SIG;
<a name="l00213"></a>00213
<a name="l00214"></a>00214 output.write(m_directory.str().data(), m_directory.str().length());
<a name="l00215"></a>00215 output.write(sig, <span class="keyword">sizeof</span>(sig));
<a name="l00216"></a>00216 output.write((<span class="keywordtype">char</span> *)&end, <span class="keyword">sizeof</span>(<a class="code" href="structBXLOCAL.html">pkzip_end_directory_t</a>));
<a name="l00217"></a>00217 }
<a name="l00218"></a>00218
<a name="l00219"></a>00219
<a name="l00220"></a>00220 } <span class="comment">// namespace Barry</span>
<a name="l00221"></a>00221
</pre></div></div>
<hr class="footer"/><address style="text-align: right;"><small>Generated by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2-20100208 </small></address>
</body>
</html>
