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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/uncompress_8c_source.html
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Tue, 30 Mar 2010 16:16:55 +0100
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/PIPS/openclibz/src/uncompress.c Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/PIPS/openclibz/src/uncompress.c</h1><a href="uncompress_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
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<a name="l00002"></a>00002 <span class="comment">* ==============================================================================</span>
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<a name="l00003"></a>00003 <span class="comment">*  Name        : UnCompress.c</span>
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<a name="l00004"></a>00004 <span class="comment">*  Part of     : OpenCLibz</span>
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<a name="l00005"></a>00005 <span class="comment">*  Interface   :</span>
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<a name="l00006"></a>00006 <span class="comment">*  Description :</span>
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<a name="l00007"></a>00007 <span class="comment">*  Version     :</span>
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<a name="l00008"></a>00008 <span class="comment">*</span>
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<a name="l00009"></a>00009 <span class="comment">*  Copyright (c) 2007 Nokia Corporation.</span>
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<a name="l00010"></a>00010 <span class="comment">*  This material, including documentation and any related</span>
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<a name="l00011"></a>00011 <span class="comment">*  computer programs, is protected by copyright controlled by</span>
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<a name="l00012"></a>00012 <span class="comment">*  Nokia Corporation.</span>
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<a name="l00013"></a>00013 <span class="comment">* ==============================================================================</span>
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<a name="l00014"></a>00014 <span class="comment">*/</span>
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<a name="l00015"></a>00015
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<a name="l00016"></a>00016
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<a name="l00021"></a>00021 <span class="preprocessor">#include &quot;<a class="code" href="openclibzheader_8h.html">OpenCLibzheader.h</a>&quot;</span>
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<a name="l00022"></a>00022
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<a name="l00023"></a>00023 <span class="comment">//</span>
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<a name="l00024"></a>00024 <span class="comment">// In case of any error , display the error message .</span>
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<a name="l00025"></a>00025 <span class="comment">//</span>
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<a name="l00026"></a>00026 <span class="keywordtype">void</span> Error(<span class="keyword">const</span> <span class="keywordtype">char</span> * msg)
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<a name="l00027"></a>00027 {
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<a name="l00028"></a>00028     printf( <span class="stringliteral">&quot; %s\n&quot;</span>,  msg);
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<a name="l00029"></a>00029     getchar();
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<a name="l00030"></a>00030     getchar();
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<a name="l00031"></a>00031     exit(1);
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<a name="l00032"></a>00032 }
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<a name="l00033"></a>00033
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<a name="l00034"></a>00034
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<a name="l00035"></a>00035
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<a name="l00036"></a>00036 <span class="comment">//Compresses the file using libz api&#39;s</span>
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<a name="l00037"></a>00037
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<a name="l00038"></a>00038 <span class="keywordtype">void</span> GzUnCompress(gzFile   in, FILE     * out)
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<a name="l00039"></a>00039
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<a name="l00040"></a>00040 {
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<a name="l00041"></a>00041     <span class="keyword">static</span> <span class="keywordtype">char</span> buf[BUFLEN];
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<a name="l00042"></a>00042     <span class="keywordtype">int</span> len;
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<a name="l00043"></a>00043     <span class="keywordtype">int</span> err;
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<a name="l00044"></a>00044
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<a name="l00045"></a>00045     <span class="keywordflow">for</span> (;;)
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<a name="l00046"></a>00046     {
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<a name="l00047"></a>00047         len = gzread(in, buf, <span class="keyword">sizeof</span>(buf)); <span class="comment">//libz api to read a compressed file</span>
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<a name="l00048"></a>00048         <span class="keywordflow">if</span> (len &lt; 0) Error (gzerror(in, &amp;err));
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<a name="l00049"></a>00049         <span class="keywordflow">if</span> (len == 0) <span class="keywordflow">break</span>;
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<a name="l00050"></a>00050
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<a name="l00051"></a>00051         <span class="keywordflow">if</span> ((<span class="keywordtype">int</span>)fwrite(buf, 1, (<span class="keywordtype">unsigned</span>)len, out) != len)
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<a name="l00052"></a>00052         {
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<a name="l00053"></a>00053             Error(<span class="stringliteral">&quot;failed fwrite&quot;</span>);
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<a name="l00054"></a>00054         }
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<a name="l00055"></a>00055     }
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<a name="l00056"></a>00056    <span class="keywordflow">if</span> (fclose(out)) Error(<span class="stringliteral">&quot;failed fclose&quot;</span>);
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<a name="l00057"></a>00057
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<a name="l00058"></a>00058    <span class="keywordflow">if</span> (gzclose(in) != Z_OK) <span class="comment">// libz api to close a compressed file</span>
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<a name="l00059"></a>00059
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<a name="l00060"></a>00060    Error(<span class="stringliteral">&quot;failed gzclose&quot;</span>);
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<a name="l00061"></a>00061
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<a name="l00062"></a>00062
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<a name="l00063"></a>00063
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<a name="l00064"></a>00064 }
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<a name="l00065"></a>00065
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<a name="l00066"></a>00066
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<a name="l00067"></a>00067
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<a name="l00068"></a>00068
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<a name="l00069"></a>00069 <span class="comment">//UnCompresses the file using libz api&#39;s</span>
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<a name="l00070"></a>00070
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<a name="l00071"></a>00071 <span class="keywordtype">void</span> FileUnCompress( <span class="keywordtype">char</span>  * file )
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<a name="l00072"></a>00072
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<a name="l00073"></a>00073 {
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<a name="l00074"></a>00074     <span class="keyword">static</span> <span class="keywordtype">char</span> buf[MAX_NAME_LEN];
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<a name="l00075"></a>00075     <span class="keywordtype">char</span> *infile, *outfile;
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<a name="l00076"></a>00076     FILE  *out;
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<a name="l00077"></a>00077     gzFile in;
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<a name="l00078"></a>00078     <span class="keywordtype">char</span> choice[3];
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<a name="l00079"></a>00079     uInt len = (uInt)strlen(file);
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<a name="l00080"></a>00080     strcpy(buf, file);
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<a name="l00081"></a>00081
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<a name="l00082"></a>00082     <span class="keywordflow">if</span> (len &gt; SUFFIX_LEN &amp;&amp; strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0)
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<a name="l00083"></a>00083     {
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<a name="l00084"></a>00084         infile = file;
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<a name="l00085"></a>00085         outfile = buf;
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<a name="l00086"></a>00086         outfile[len-3] = <span class="charliteral">&#39;\0&#39;</span>; <span class="comment">//create the output filename</span>
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<a name="l00087"></a>00087     }
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<a name="l00088"></a>00088     <span class="keywordflow">else</span>
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<a name="l00089"></a>00089     {
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<a name="l00090"></a>00090         outfile = file;
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<a name="l00091"></a>00091         infile = buf;
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<a name="l00092"></a>00092         strcat(infile, GZ_SUFFIX); <span class="comment">//create the input filename</span>
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<a name="l00093"></a>00093     }
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<a name="l00094"></a>00094     in = gzopen(infile, <span class="stringliteral">&quot;rb&quot;</span>); <span class="comment">// libz api to open a compressed file</span>
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<a name="l00095"></a>00095
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<a name="l00096"></a>00096     <span class="keywordflow">if</span> (in == NULL)
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<a name="l00097"></a>00097     {
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<a name="l00098"></a>00098
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<a name="l00099"></a>00099       Error(<span class="stringliteral">&quot;file not found ...try again \n&quot;</span>);
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<a name="l00100"></a>00100
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<a name="l00101"></a>00101     }
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<a name="l00102"></a>00102     out = fopen(outfile, <span class="stringliteral">&quot;wb&quot;</span>); <span class="comment">//open the output filename</span>
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<a name="l00103"></a>00103     <span class="keywordflow">if</span> (out == NULL)
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<a name="l00104"></a>00104     {
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<a name="l00105"></a>00105     gzclose(in);       <span class="comment">// libz api to close a compressed file</span>
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<a name="l00106"></a>00106     }
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<a name="l00107"></a>00107
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<a name="l00108"></a>00108     GzUnCompress(in, out);
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<a name="l00109"></a>00109
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<a name="l00110"></a>00110     printf(<span class="stringliteral">&quot;do you want to delete the original file (y /n) \n&quot;</span>);
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<a name="l00111"></a>00111
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<a name="l00112"></a>00112     scanf(<span class="stringliteral">&quot;%s&quot;</span>,choice);
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<a name="l00113"></a>00113
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<a name="l00114"></a>00114     <span class="keywordflow">if</span>(choice[0] == <span class="charliteral">&#39;y&#39;</span>)
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<a name="l00115"></a>00115     unlink(file);
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<a name="l00116"></a>00116     printf(<span class="stringliteral">&quot; Congrats .... uncompression done ...u can find uncompressed file in the same directory as of the source file\n&quot;</span>);
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<a name="l00117"></a>00117
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<a name="l00118"></a>00118 }
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<a name="l00119"></a>00119
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<a name="l00120"></a>00120 <span class="comment">/*  End of File */</span>
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</pre></div></div>
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<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
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<a href="http://www.doxygen.org/index.html">
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<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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</body>
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</html>
FCL/sftools/depl/docscontent