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<h1>tarfile-ops-nt.cc</h1><a href="tarfile-ops-nt_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 tarfile-ops-nt.cc</span>
<a name="l00003"></a>00003 <span class="comment"></span><span class="comment">/// Non-thread safe operation functions for a libtar-compatible</span>
<a name="l00004"></a>00004 <span class="comment"></span><span class="comment">/// zlib compression interface.</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) 2007-2011, Chris Frey <cdfrey@foursquare.net></span>
<a name="l00008"></a>00008 <span class="comment"></span>
<a name="l00009"></a>00009 <span class="comment"> This program is free software; you can redistribute it and/or modify</span>
<a name="l00010"></a>00010 <span class="comment"> it under the terms of the GNU General Public License as published by</span>
<a name="l00011"></a>00011 <span class="comment"> the Free Software Foundation; either version 2 of the License, or</span>
<a name="l00012"></a>00012 <span class="comment"> (at your option) any later version.</span>
<a name="l00013"></a>00013 <span class="comment"></span>
<a name="l00014"></a>00014 <span class="comment"> This program is distributed in the hope that it will be useful,</span>
<a name="l00015"></a>00015 <span class="comment"> but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00016"></a>00016 <span class="comment"> MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.</span>
<a name="l00017"></a>00017 <span class="comment"></span>
<a name="l00018"></a>00018 <span class="comment"> See the GNU General Public License in the COPYING file at the</span>
<a name="l00019"></a>00019 <span class="comment"> root directory of this project for more details.</span>
<a name="l00020"></a>00020 <span class="comment">*/</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022 <span class="preprocessor">#include "<a class="code" href="tarfile_8h.html" title="API for reading and writing sequentially from compressed tar files.">tarfile.h</a>"</span>
<a name="l00023"></a>00023
<a name="l00024"></a>00024 <span class="preprocessor">#include <sys/types.h></span>
<a name="l00025"></a>00025 <span class="preprocessor">#include <sys/stat.h></span>
<a name="l00026"></a>00026 <span class="preprocessor">#include <fcntl.h></span>
<a name="l00027"></a>00027 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="preprocessor">#include <zlib.h></span>
<a name="l00030"></a>00030
<a name="l00031"></a>00031 <span class="preprocessor">#include <assert.h></span>
<a name="l00032"></a>00032
<a name="l00033"></a>00033 <span class="keyword">namespace </span>reuse {
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">namespace </span>gztar_nonthread {
<a name="l00036"></a>00036
<a name="l00037"></a>00037 <span class="keyword">namespace </span>{
<a name="l00038"></a>00038 <span class="comment">// array of compressed file handles... needed for architectures</span>
<a name="l00039"></a>00039 <span class="comment">// where sizeof(int) != sizeof(gzFile)</span>
<a name="l00040"></a>00040 gzFile *gzHandles = 0;
<a name="l00041"></a>00041 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> gzArraySize = 0;
<a name="l00042"></a>00042 }
<a name="l00043"></a>00043
<a name="l00044"></a>00044 <span class="keywordtype">int</span> open_compressed(<span class="keyword">const</span> <span class="keywordtype">char</span> *file, <span class="keywordtype">int</span> flags, mode_t mode)
<a name="l00045"></a>00045 {
<a name="l00046"></a>00046 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> index = 0;
<a name="l00047"></a>00047 <span class="keywordflow">for</span>( ; index < gzArraySize; index++ ) {
<a name="l00048"></a>00048 <span class="keywordflow">if</span>( gzHandles[index] == 0 )
<a name="l00049"></a>00049 <span class="keywordflow">break</span>;
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051 <span class="keywordflow">if</span>( index >= gzArraySize ) {
<a name="l00052"></a>00052 gzFile *h = (gzFile*) realloc(gzHandles,
<a name="l00053"></a>00053 (gzArraySize + 100) * <span class="keyword">sizeof</span>(gzFile));
<a name="l00054"></a>00054 <span class="keywordflow">if</span>( h ) {
<a name="l00055"></a>00055 gzHandles = h;
<a name="l00056"></a>00056 gzArraySize += 100;
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058 <span class="keywordflow">else</span> {
<a name="l00059"></a>00059 <span class="keywordflow">return</span> -1;
<a name="l00060"></a>00060 }
<a name="l00061"></a>00061 }
<a name="l00062"></a>00062
<a name="l00063"></a>00063 <span class="keywordtype">int</span> fd = open(file, flags, mode);
<a name="l00064"></a>00064 <span class="keywordflow">if</span>( fd == -1 )
<a name="l00065"></a>00065 <span class="keywordflow">return</span> -1;
<a name="l00066"></a>00066
<a name="l00067"></a>00067 gzFile gfd = gzdopen(fd, (flags & O_WRONLY) ? <span class="stringliteral">"wb9"</span> : <span class="stringliteral">"rb"</span>);
<a name="l00068"></a>00068 <span class="keywordflow">if</span>( gfd == NULL ) {
<a name="l00069"></a>00069 close(fd);
<a name="l00070"></a>00070 <span class="keywordflow">return</span> -1;
<a name="l00071"></a>00071 }
<a name="l00072"></a>00072
<a name="l00073"></a>00073 gzHandles[index] = gfd;
<a name="l00074"></a>00074 <span class="keywordflow">return</span> index;
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076
<a name="l00077"></a>00077 <span class="keywordtype">int</span> close_compressed(<span class="keywordtype">int</span> fd)
<a name="l00078"></a>00078 {
<a name="l00079"></a>00079 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> ufd = fd;
<a name="l00080"></a>00080 assert( ufd < gzArraySize );
<a name="l00081"></a>00081 <span class="keywordtype">int</span> ret = gzclose(gzHandles[ufd]);
<a name="l00082"></a>00082 gzHandles[ufd] = 0;
<a name="l00083"></a>00083 <span class="keywordflow">return</span> ret;
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085
<a name="l00086"></a>00086 ssize_t read_compressed(<span class="keywordtype">int</span> fd, <span class="keywordtype">void</span> *buf, <span class="keywordtype">size_t</span> size)
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> ufd = fd;
<a name="l00089"></a>00089 assert( ufd < gzArraySize );
<a name="l00090"></a>00090 <span class="keywordflow">return</span> gzread(gzHandles[ufd], buf, size);
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092
<a name="l00093"></a>00093 ssize_t write_compressed(<span class="keywordtype">int</span> fd, <span class="keyword">const</span> <span class="keywordtype">void</span> *buf, <span class="keywordtype">size_t</span> size)
<a name="l00094"></a>00094 {
<a name="l00095"></a>00095 <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> ufd = fd;
<a name="l00096"></a>00096 assert( ufd < gzArraySize );
<a name="l00097"></a>00097 <span class="keywordflow">return</span> gzwrite(gzHandles[ufd], buf, size);
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099
<a name="l00100"></a>00100 } <span class="comment">// namespace gztar_nonthread</span>
<a name="l00101"></a>00101
<a name="l00102"></a>00102
<a name="l00103"></a>00103 tartype_t gztar_ops_nonthread = {
<a name="l00104"></a>00104 (openfunc_t) gztar_nonthread::open_compressed,
<a name="l00105"></a>00105 gztar_nonthread::close_compressed,
<a name="l00106"></a>00106 gztar_nonthread::read_compressed,
<a name="l00107"></a>00107 gztar_nonthread::write_compressed
<a name="l00108"></a>00108 };
<a name="l00109"></a>00109
<a name="l00110"></a>00110
<a name="l00111"></a>00111 } <span class="comment">// namespace reuse</span>
<a name="l00112"></a>00112
</pre></div></div>
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