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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/asc85enc_8c_source.html
author Dominic Pinkman <Dominic.Pinkman@Nokia.com>
Tue, 30 Mar 2010 16:16:55 +0100
changeset 6 43e37759235e
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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/antiword/src/asc85enc.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/antiword/src/asc85enc.c</h1><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"> * asc85enc.c</span>
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<a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 2000-2003 A.J. van Os; Released under GPL</span>
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<a name="l00004"></a>00004 <span class="comment"> *</span>
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<a name="l00005"></a>00005 <span class="comment"> * Description:</span>
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<a name="l00006"></a>00006 <span class="comment"> * Functions to for ASCII 85 encoding</span>
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<a name="l00007"></a>00007 <span class="comment"> *</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"> * This part of the software is based on:</span>
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<a name="l00010"></a>00010 <span class="comment"> * asc85ec.c - ASCII85 and Hex encoding for PostScript Level 2 and PDF</span>
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<a name="l00011"></a>00011 <span class="comment"> * Copyright (C) 1994-99 Thomas Merz (tm@muc.de)</span>
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<a name="l00012"></a>00012 <span class="comment"> *====================================================================</span>
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<a name="l00013"></a>00013 <span class="comment"> * The credit should go to him, but all the bugs are mine.</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 <span class="preprocessor">#include &lt;stdio.h&gt;</span>
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<a name="l00017"></a>00017 <span class="preprocessor">#include &quot;antiword.h&quot;</span>
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<a name="l00018"></a>00018
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<a name="l00019"></a>00019 <span class="keyword">static</span> <span class="keyword">const</span> ULONG      aulPower85[5] = {
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<a name="l00020"></a>00020         1UL, 85UL, 85UL * 85, 85UL * 85 * 85, 85UL * 85 * 85 * 85,
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<a name="l00021"></a>00021 };
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<a name="l00022"></a>00022 <span class="keyword">static</span> <span class="keywordtype">int</span>      iOutBytes = 0;  <span class="comment">/* Number of characters in an output line */</span>
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<a name="l00023"></a>00023 <span class="keyword">static</span> <span class="keywordtype">char</span>     cCharPrev = <span class="charliteral">&#39;\0&#39;</span>;
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<a name="l00024"></a>00024
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<a name="l00025"></a>00025 <span class="comment">/*</span>
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<a name="l00026"></a>00026 <span class="comment"> * Two percent characters at the start of a line will cause trouble</span>
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<a name="l00027"></a>00027 <span class="comment"> * with some post-processing software. In order to avoid this, we</span>
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<a name="l00028"></a>00028 <span class="comment"> * simply insert a line break if we encounter two percent characters</span>
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<a name="l00029"></a>00029 <span class="comment"> * at the start of the line. Of course, this rather simplistic</span>
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<a name="l00030"></a>00030 <span class="comment"> * algorithm may lead to a large line count in pathological cases,</span>
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<a name="l00031"></a>00031 <span class="comment"> * but the chance for hitting such a case is very small, and even</span>
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<a name="l00032"></a>00032 <span class="comment"> * so it&#39;s only a cosmetic flaw and not a functional restriction.</span>
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<a name="l00033"></a>00033 <span class="comment"> */</span>
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<a name="l00034"></a>00034
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<a name="l00035"></a>00035 <span class="comment">/*</span>
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<a name="l00036"></a>00036 <span class="comment"> * vOutputByte - output one byte</span>
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<a name="l00037"></a>00037 <span class="comment"> */</span>
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<a name="l00038"></a>00038 <span class="keyword">static</span> <span class="keywordtype">void</span>
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<a name="l00039"></a>00039 vOutputByte(ULONG ulChar, FILE *pOutFile)
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<a name="l00040"></a>00040 {
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<a name="l00041"></a>00041         <span class="keywordflow">if</span> (iOutBytes == 1 &amp;&amp; cCharPrev == <span class="charliteral">&#39;%&#39;</span> &amp;&amp; ulChar == (ULONG)<span class="charliteral">&#39;%&#39;</span>) {
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<a name="l00042"></a>00042                 <span class="keywordflow">if</span> (putc(<span class="charliteral">&#39;\n&#39;</span>, pOutFile) != EOF) {
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<a name="l00043"></a>00043                         iOutBytes = 0;
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<a name="l00044"></a>00044                 }
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<a name="l00045"></a>00045         }
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<a name="l00046"></a>00046         <span class="keywordflow">if</span> (putc((<span class="keywordtype">int</span>)ulChar, pOutFile) == EOF) {
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<a name="l00047"></a>00047                 <span class="keywordflow">return</span>;
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<a name="l00048"></a>00048         }
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<a name="l00049"></a>00049         iOutBytes++;
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<a name="l00050"></a>00050         <span class="keywordflow">if</span> (iOutBytes &gt; 63) {
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<a name="l00051"></a>00051                 <span class="keywordflow">if</span> (putc(<span class="charliteral">&#39;\n&#39;</span>, pOutFile) != EOF) {
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<a name="l00052"></a>00052                         iOutBytes = 0;
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<a name="l00053"></a>00053                 }
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<a name="l00054"></a>00054         }
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<a name="l00055"></a>00055         cCharPrev = (char)ulChar;
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<a name="l00056"></a>00056 } <span class="comment">/* end of vOutputByte */</span>
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<a name="l00057"></a>00057
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<a name="l00058"></a>00058 <span class="comment">/*</span>
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<a name="l00059"></a>00059 <span class="comment"> * vASCII85EncodeByte - ASCII 85 encode a byte</span>
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<a name="l00060"></a>00060 <span class="comment"> */</span>
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<a name="l00061"></a>00061 <span class="keywordtype">void</span>
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<a name="l00062"></a>00062 vASCII85EncodeByte(FILE *pOutFile, <span class="keywordtype">int</span> iByte)
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<a name="l00063"></a>00063 {
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<a name="l00064"></a>00064         <span class="keyword">static</span> ULONG    ulBuffer[4] = { 0, 0, 0, 0 };
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<a name="l00065"></a>00065         <span class="keyword">static</span> <span class="keywordtype">int</span>      iInBuffer = 0;
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<a name="l00066"></a>00066         ULONG   ulValue, ulTmp;
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<a name="l00067"></a>00067         <span class="keywordtype">int</span>     iIndex;
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<a name="l00068"></a>00068
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<a name="l00069"></a>00069         fail(pOutFile == NULL);
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<a name="l00070"></a>00070         fail(iInBuffer &lt; 0);
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<a name="l00071"></a>00071         fail(iInBuffer &gt; 3);
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<a name="l00072"></a>00072
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<a name="l00073"></a>00073         <span class="keywordflow">if</span> (iByte == EOF) {
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<a name="l00074"></a>00074                 <span class="comment">/* End Of File, time to clean up */</span>
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<a name="l00075"></a>00075                 <span class="keywordflow">if</span> (iInBuffer &gt; 0 &amp;&amp; iInBuffer &lt; 4) {
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<a name="l00076"></a>00076                         <span class="comment">/* Encode the remaining bytes */</span>
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<a name="l00077"></a>00077                         ulValue = 0;
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<a name="l00078"></a>00078                         <span class="keywordflow">for</span> (iIndex = iInBuffer - 1; iIndex &gt;= 0; iIndex--) {
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<a name="l00079"></a>00079                                 ulValue |=
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<a name="l00080"></a>00080                                         ulBuffer[iIndex] &lt;&lt; (8 * (3 - iIndex));
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<a name="l00081"></a>00081                         }
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<a name="l00082"></a>00082                         <span class="keywordflow">for</span> (iIndex = 4; iIndex &gt;= 4 - iInBuffer; iIndex--) {
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<a name="l00083"></a>00083                                 ulTmp = ulValue / aulPower85[iIndex];
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<a name="l00084"></a>00084                                 vOutputByte(ulTmp + <span class="charliteral">&#39;!&#39;</span>, pOutFile);
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<a name="l00085"></a>00085                                 ulValue -= ulTmp * aulPower85[iIndex];
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<a name="l00086"></a>00086                         }
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<a name="l00087"></a>00087                 }
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<a name="l00088"></a>00088                 <span class="comment">/* Add the End Of Data marker */</span>
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<a name="l00089"></a>00089                 (void)putc(<span class="charliteral">&#39;~&#39;</span>, pOutFile);
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<a name="l00090"></a>00090                 (void)putc(<span class="charliteral">&#39;&gt;&#39;</span>, pOutFile);
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<a name="l00091"></a>00091                 (void)putc(<span class="charliteral">&#39;\n&#39;</span>, pOutFile);
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<a name="l00092"></a>00092                 <span class="comment">/* Reset the control variables */</span>
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<a name="l00093"></a>00093                 iInBuffer = 0;
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<a name="l00094"></a>00094                 iOutBytes = 0;
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<a name="l00095"></a>00095                 cCharPrev = <span class="charliteral">&#39;\0&#39;</span>;
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<a name="l00096"></a>00096                 <span class="keywordflow">return</span>;
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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         ulBuffer[iInBuffer] = (ULONG)iByte &amp; 0xff;
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<a name="l00100"></a>00100         iInBuffer++;
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<a name="l00101"></a>00101
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<a name="l00102"></a>00102         <span class="keywordflow">if</span> (iInBuffer &gt;= 4) {
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<a name="l00103"></a>00103                 ulValue = (ulBuffer[0] &lt;&lt; 24) | (ulBuffer[1] &lt;&lt; 16) |
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<a name="l00104"></a>00104                         (ulBuffer[2] &lt;&lt; 8) | ulBuffer[3];
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<a name="l00105"></a>00105                 <span class="keywordflow">if</span> (ulValue == 0) {
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<a name="l00106"></a>00106                         vOutputByte((ULONG)<span class="charliteral">&#39;z&#39;</span>, pOutFile); <span class="comment">/* Shortcut for 0 */</span>
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<a name="l00107"></a>00107                 } <span class="keywordflow">else</span> {
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<a name="l00108"></a>00108                         <span class="keywordflow">for</span> (iIndex = 4; iIndex &gt;= 0; iIndex--) {
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<a name="l00109"></a>00109                                 ulTmp = ulValue / aulPower85[iIndex];
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<a name="l00110"></a>00110                                 vOutputByte(ulTmp + <span class="charliteral">&#39;!&#39;</span>, pOutFile);
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<a name="l00111"></a>00111                                 ulValue -= ulTmp * aulPower85[iIndex];
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<a name="l00112"></a>00112                         }
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<a name="l00113"></a>00113                 }
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<a name="l00114"></a>00114                 <span class="comment">/* Reset the buffer */</span>
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<a name="l00115"></a>00115                 iInBuffer = 0;
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<a name="l00116"></a>00116         }
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<a name="l00117"></a>00117 } <span class="comment">/* end of vASCII85EncodeByte */</span>
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<a name="l00118"></a>00118
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<a name="l00119"></a>00119 <span class="comment">/*</span>
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<a name="l00120"></a>00120 <span class="comment"> * vASCII85EncodeArray - ASCII 85 encode a byte array</span>
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<a name="l00121"></a>00121 <span class="comment"> */</span>
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<a name="l00122"></a>00122 <span class="keywordtype">void</span>
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<a name="l00123"></a>00123 vASCII85EncodeArray(FILE *pInFile, FILE *pOutFile, <span class="keywordtype">size_t</span> tLength)
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<a name="l00124"></a>00124 {
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<a name="l00125"></a>00125         <span class="keywordtype">size_t</span>  tCount;
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<a name="l00126"></a>00126         <span class="keywordtype">int</span>     iByte;
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<a name="l00127"></a>00127
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<a name="l00128"></a>00128         fail(pInFile == NULL);
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<a name="l00129"></a>00129         fail(pOutFile == NULL);
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<a name="l00130"></a>00130
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<a name="l00131"></a>00131         DBG_DEC(tLength);
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<a name="l00132"></a>00132
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<a name="l00133"></a>00133         <span class="keywordflow">for</span> (tCount = 0; tCount &lt; tLength; tCount++) {
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<a name="l00134"></a>00134                 iByte = iNextByte(pInFile);
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<a name="l00135"></a>00135                 <span class="keywordflow">if</span> (iByte == EOF) {
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<a name="l00136"></a>00136                         <span class="keywordflow">break</span>;
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<a name="l00137"></a>00137                 }
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<a name="l00138"></a>00138                 vASCII85EncodeByte(pOutFile, iByte);
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<a name="l00139"></a>00139         }
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<a name="l00140"></a>00140 } <span class="comment">/* end of vASCII85EncodeArray */</span>
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<a name="l00141"></a>00141
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<a name="l00142"></a>00142 <span class="comment">/*</span>
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<a name="l00143"></a>00143 <span class="comment"> * vASCII85EncodeFile - ASCII 85 encode part of a file</span>
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<a name="l00144"></a>00144 <span class="comment"> */</span>
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<a name="l00145"></a>00145 <span class="keywordtype">void</span>
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<a name="l00146"></a>00146 vASCII85EncodeFile(FILE *pInFile, FILE *pOutFile, <span class="keywordtype">size_t</span> tLength)
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<a name="l00147"></a>00147 {
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<a name="l00148"></a>00148         fail(pInFile == NULL);
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<a name="l00149"></a>00149         fail(pOutFile == NULL);
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<a name="l00150"></a>00150         fail(tLength == 0);
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<a name="l00151"></a>00151
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<a name="l00152"></a>00152         vASCII85EncodeArray(pInFile, pOutFile, tLength);
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<a name="l00153"></a>00153         vASCII85EncodeByte(pOutFile, EOF);
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<a name="l00154"></a>00154 } <span class="comment">/* end of vASCII85EncodeFile */</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