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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/datalist_8c_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 11 Jun 2010 15:24:34 +0100
changeset 9 59758314f811
parent 6 43e37759235e
permissions -rw-r--r--
Week 23 contribution of PDK documentation content. See release notes for details. Fixes bugs Bug 2714, Bug 462.
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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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/datalist.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/datalist.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"> * datalist.c</span>
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<a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 2000-2002 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"> * Build, read and destroy a list of Word data blocks</span>
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<a name="l00007"></a>00007 <span class="comment"> */</span>
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<a name="l00008"></a>00008
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<a name="l00009"></a>00009 <span class="preprocessor">#include &lt;stdlib.h&gt;</span>
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<a name="l00010"></a>00010 <span class="preprocessor">#include &lt;errno.h&gt;</span>
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<a name="l00011"></a>00011 <span class="preprocessor">#include &quot;antiword.h&quot;</span>
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<a name="l00012"></a>00012
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<a name="l00013"></a>00013 <span class="preprocessor">#if defined(__riscos)</span>
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<a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define EIO             42</span>
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<a name="l00015"></a>00015 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* __riscos */</span>
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<a name="l00016"></a>00016
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018 <span class="comment">/*</span>
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<a name="l00019"></a>00019 <span class="comment"> * Private structure to hide the way the information</span>
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<a name="l00020"></a>00020 <span class="comment"> * is stored from the rest of the program</span>
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<a name="l00021"></a>00021 <span class="comment"> */</span>
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<a name="l00022"></a>00022 <span class="keyword">typedef</span> <span class="keyword">struct </span>data_mem_tag {
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<a name="l00023"></a>00023         data_block_type         tInfo;
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<a name="l00024"></a>00024         <span class="keyword">struct </span>data_mem_tag     *pNext;
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<a name="l00025"></a>00025 } data_mem_type;
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<a name="l00026"></a>00026
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<a name="l00027"></a>00027 <span class="comment">/* Variable to describe the start of the data block list */</span>
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<a name="l00028"></a>00028 <span class="keyword">static</span> data_mem_type    *pAnchor = NULL;
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<a name="l00029"></a>00029 <span class="comment">/* Variable needed to read the data block list */</span>
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<a name="l00030"></a>00030 <span class="keyword">static</span> data_mem_type    *pBlockLast = NULL;
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<a name="l00031"></a>00031 <span class="comment">/* Variable needed to read the data block list */</span>
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<a name="l00032"></a>00032 <span class="keyword">static</span> data_mem_type    *pBlockCurrent = NULL;
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<a name="l00033"></a>00033 <span class="keyword">static</span> ULONG    ulBlockOffset = 0;
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<a name="l00034"></a>00034 <span class="keyword">static</span> <span class="keywordtype">size_t</span>   tByteNext = 0;
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<a name="l00035"></a>00035 <span class="comment">/* Last block read */</span>
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<a name="l00036"></a>00036 <span class="keyword">static</span> UCHAR    aucBlock[BIG_BLOCK_SIZE];
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<a name="l00037"></a>00037
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<a name="l00038"></a>00038
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<a name="l00039"></a>00039 <span class="comment">/*</span>
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<a name="l00040"></a>00040 <span class="comment"> * vDestroyDataBlockList - destroy the data block list</span>
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<a name="l00041"></a>00041 <span class="comment"> */</span>
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<a name="l00042"></a>00042 <span class="keywordtype">void</span>
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<a name="l00043"></a>00043 vDestroyDataBlockList(<span class="keywordtype">void</span>)
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<a name="l00044"></a>00044 {
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<a name="l00045"></a>00045         data_mem_type   *pCurr, *pNext;
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<a name="l00046"></a>00046
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<a name="l00047"></a>00047         DBG_MSG(<span class="stringliteral">&quot;vDestroyDataBlockList&quot;</span>);
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<a name="l00048"></a>00048
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<a name="l00049"></a>00049         pCurr = pAnchor;
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<a name="l00050"></a>00050         <span class="keywordflow">while</span> (pCurr != NULL) {
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<a name="l00051"></a>00051                 pNext = pCurr-&gt;pNext;
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<a name="l00052"></a>00052                 pCurr = xfree(pCurr);
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<a name="l00053"></a>00053                 pCurr = pNext;
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<a name="l00054"></a>00054         }
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<a name="l00055"></a>00055         pAnchor = NULL;
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<a name="l00056"></a>00056         <span class="comment">/* Reset all the control variables */</span>
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<a name="l00057"></a>00057         pBlockLast = NULL;
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<a name="l00058"></a>00058         pBlockCurrent = NULL;
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<a name="l00059"></a>00059         ulBlockOffset = 0;
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<a name="l00060"></a>00060         tByteNext = 0;
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<a name="l00061"></a>00061 } <span class="comment">/* end of vDestroyDataBlockList */</span>
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<a name="l00062"></a>00062
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<a name="l00063"></a>00063 <span class="comment">/*</span>
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<a name="l00064"></a>00064 <span class="comment"> * bAdd2DataBlockList - add an element to the data block list</span>
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<a name="l00065"></a>00065 <span class="comment"> *</span>
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<a name="l00066"></a>00066 <span class="comment"> * Returns TRUE when successful, otherwise FALSE</span>
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<a name="l00067"></a>00067 <span class="comment"> */</span>
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<a name="l00068"></a>00068 BOOL
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<a name="l00069"></a>00069 bAdd2DataBlockList(<span class="keyword">const</span> data_block_type *pDataBlock)
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<a name="l00070"></a>00070 {
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<a name="l00071"></a>00071         data_mem_type   *pListMember;
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<a name="l00072"></a>00072
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<a name="l00073"></a>00073         fail(pDataBlock == NULL);
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<a name="l00074"></a>00074         fail(pDataBlock-&gt;ulFileOffset == FC_INVALID);
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<a name="l00075"></a>00075         fail(pDataBlock-&gt;ulDataPos == CP_INVALID);
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<a name="l00076"></a>00076         fail(pDataBlock-&gt;ulLength == 0);
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<a name="l00077"></a>00077
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<a name="l00078"></a>00078         NO_DBG_MSG(<span class="stringliteral">&quot;bAdd2DataBlockList&quot;</span>);
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<a name="l00079"></a>00079         NO_DBG_HEX(pDataBlock-&gt;ulFileOffset);
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<a name="l00080"></a>00080         NO_DBG_HEX(pDataBlock-&gt;ulDataPos);
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<a name="l00081"></a>00081         NO_DBG_HEX(pDataBlock-&gt;ulLength);
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<a name="l00082"></a>00082
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<a name="l00083"></a>00083         <span class="keywordflow">if</span> (pDataBlock-&gt;ulFileOffset == FC_INVALID ||
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<a name="l00084"></a>00084             pDataBlock-&gt;ulDataPos == CP_INVALID ||
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<a name="l00085"></a>00085             pDataBlock-&gt;ulLength == 0) {
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<a name="l00086"></a>00086                 werr(0, <span class="stringliteral">&quot;Software (datablock) error&quot;</span>);
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<a name="l00087"></a>00087                 <span class="keywordflow">return</span> FALSE;
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<a name="l00088"></a>00088         }
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<a name="l00089"></a>00089         <span class="comment">/* Check for continuous blocks */</span>
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<a name="l00090"></a>00090         <span class="keywordflow">if</span> (pBlockLast != NULL &amp;&amp;
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<a name="l00091"></a>00091             pBlockLast-&gt;tInfo.ulFileOffset +
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<a name="l00092"></a>00092              pBlockLast-&gt;tInfo.ulLength == pDataBlock-&gt;ulFileOffset &amp;&amp;
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<a name="l00093"></a>00093             pBlockLast-&gt;tInfo.ulDataPos +
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<a name="l00094"></a>00094              pBlockLast-&gt;tInfo.ulLength == pDataBlock-&gt;ulDataPos) {
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diff changeset 
   105
 
<a name="l00095"></a>00095                 <span class="comment">/* These are continous blocks */</span>
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diff changeset 
   106
 
<a name="l00096"></a>00096                 pBlockLast-&gt;tInfo.ulLength += pDataBlock-&gt;ulLength;
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diff changeset 
   107
 
<a name="l00097"></a>00097                 <span class="keywordflow">return</span> TRUE;
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diff changeset 
   108
 
<a name="l00098"></a>00098         }
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   109
 
<a name="l00099"></a>00099         <span class="comment">/* Make a new block */</span>
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diff changeset 
   110
 
<a name="l00100"></a>00100         pListMember = xmalloc(<span class="keyword">sizeof</span>(data_mem_type));
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diff changeset 
   111
 
<a name="l00101"></a>00101         <span class="comment">/* Add the block to the data list */</span>
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diff changeset 
   112
 
<a name="l00102"></a>00102         pListMember-&gt;tInfo = *pDataBlock;
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   113
 
<a name="l00103"></a>00103         pListMember-&gt;pNext = NULL;
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   114
 
<a name="l00104"></a>00104         <span class="keywordflow">if</span> (pAnchor == NULL) {
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   115
 
<a name="l00105"></a>00105                 pAnchor = pListMember;
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   116
 
<a name="l00106"></a>00106         } <span class="keywordflow">else</span> {
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   117
 
<a name="l00107"></a>00107                 fail(pBlockLast == NULL);
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   118
 
<a name="l00108"></a>00108                 pBlockLast-&gt;pNext = pListMember;
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   119
 
<a name="l00109"></a>00109         }
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   120
 
<a name="l00110"></a>00110         pBlockLast = pListMember;
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   121
 
<a name="l00111"></a>00111         <span class="keywordflow">return</span> TRUE;
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   122
 
<a name="l00112"></a>00112 } <span class="comment">/* end of bAdd2DataBlockList */</span>
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diff changeset 
   123
 
<a name="l00113"></a>00113
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diff changeset 
   124
 
<a name="l00114"></a>00114 <span class="comment">/*</span>
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   125
 
<a name="l00115"></a>00115 <span class="comment"> * ulGetDataOffset - get the offset in the data block list</span>
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   126
 
<a name="l00116"></a>00116 <span class="comment"> *</span>
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   127
 
<a name="l00117"></a>00117 <span class="comment"> * Get the fileoffset the current position in the data block list</span>
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   128
 
<a name="l00118"></a>00118 <span class="comment"> */</span>
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   129
 
<a name="l00119"></a>00119 ULONG
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   130
 
<a name="l00120"></a>00120 ulGetDataOffset(FILE *pFile)
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   131
 
<a name="l00121"></a>00121 {
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   132
 
<a name="l00122"></a>00122         <span class="keywordflow">return</span> pBlockCurrent-&gt;tInfo.ulFileOffset + ulBlockOffset + tByteNext;
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   133
 
<a name="l00123"></a>00123 } <span class="comment">/* end of ulGetDataOffset */</span>
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diff changeset 
   134
 
<a name="l00124"></a>00124
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   135
 
<a name="l00125"></a>00125 <span class="comment">/*</span>
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   136
 
<a name="l00126"></a>00126 <span class="comment"> * bSetDataOffset - set the offset in the data block list</span>
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   137
 
<a name="l00127"></a>00127 <span class="comment"> *</span>
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   138
 
<a name="l00128"></a>00128 <span class="comment"> * Make the given fileoffset the current position in the data block list</span>
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   139
 
<a name="l00129"></a>00129 <span class="comment"> */</span>
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   140
 
<a name="l00130"></a>00130 BOOL
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   141
 
<a name="l00131"></a>00131 bSetDataOffset(FILE *pFile, ULONG ulFileOffset)
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   142
 
<a name="l00132"></a>00132 {
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   143
 
<a name="l00133"></a>00133         data_mem_type   *pCurr;
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   144
 
<a name="l00134"></a>00134         <span class="keywordtype">size_t</span>  tReadLen;
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diff changeset 
   145
 
<a name="l00135"></a>00135
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   146
 
<a name="l00136"></a>00136         DBG_HEX(ulFileOffset);
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diff changeset 
   147
 
<a name="l00137"></a>00137
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   148
 
<a name="l00138"></a>00138         <span class="keywordflow">for</span> (pCurr = pAnchor; pCurr != NULL; pCurr = pCurr-&gt;pNext) {
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   149
 
<a name="l00139"></a>00139                 <span class="keywordflow">if</span> (ulFileOffset &lt; pCurr-&gt;tInfo.ulFileOffset ||
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   150
 
<a name="l00140"></a>00140                     ulFileOffset &gt;= pCurr-&gt;tInfo.ulFileOffset +
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   151
 
<a name="l00141"></a>00141                      pCurr-&gt;tInfo.ulLength) {
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   152
 
<a name="l00142"></a>00142                         <span class="comment">/* The file offset is not in this block */</span>
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   153
 
<a name="l00143"></a>00143                         <span class="keywordflow">continue</span>;
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   154
 
<a name="l00144"></a>00144                 }
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   155
 
<a name="l00145"></a>00145                 <span class="comment">/* Compute the maximum number of bytes to read */</span>
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   156
 
<a name="l00146"></a>00146                 tReadLen = (size_t)(pCurr-&gt;tInfo.ulFileOffset +
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   157
 
<a name="l00147"></a>00147                                 pCurr-&gt;tInfo.ulLength -
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   158
 
<a name="l00148"></a>00148                                 ulFileOffset);
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   159
 
<a name="l00149"></a>00149                 <span class="comment">/* Compute the real number of bytes to read */</span>
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   160
 
<a name="l00150"></a>00150                 <span class="keywordflow">if</span> (tReadLen &gt; <span class="keyword">sizeof</span>(aucBlock)) {
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   161
 
<a name="l00151"></a>00151                         tReadLen = <span class="keyword">sizeof</span>(aucBlock);
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   162
 
<a name="l00152"></a>00152                 }
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   163
 
<a name="l00153"></a>00153                 <span class="comment">/* Read the bytes */</span>
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   164
 
<a name="l00154"></a>00154                 <span class="keywordflow">if</span> (!bReadBytes(aucBlock, tReadLen, ulFileOffset, pFile)) {
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   165
 
<a name="l00155"></a>00155                         <span class="keywordflow">return</span> FALSE;
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   166
 
<a name="l00156"></a>00156                 }
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diff changeset 
   167
 
<a name="l00157"></a>00157                 <span class="comment">/* Set the control variables */</span>
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diff changeset 
   168
 
<a name="l00158"></a>00158                 pBlockCurrent = pCurr;
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   169
 
<a name="l00159"></a>00159                 ulBlockOffset = ulFileOffset - pCurr-&gt;tInfo.ulFileOffset;
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   170
 
<a name="l00160"></a>00160                 tByteNext = 0;
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   171
 
<a name="l00161"></a>00161                 <span class="keywordflow">return</span> TRUE;
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   172
 
<a name="l00162"></a>00162         }
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   173
 
<a name="l00163"></a>00163         <span class="keywordflow">return</span> FALSE;
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   174
 
<a name="l00164"></a>00164 } <span class="comment">/* end of bSetDataOffset */</span>
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diff changeset 
   175
 
<a name="l00165"></a>00165
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   176
 
<a name="l00166"></a>00166 <span class="comment">/*</span>
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   177
 
<a name="l00167"></a>00167 <span class="comment"> * iNextByte - get the next byte from the data block list</span>
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   178
 
<a name="l00168"></a>00168 <span class="comment"> */</span>
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   179
 
<a name="l00169"></a>00169 <span class="keywordtype">int</span>
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   180
 
<a name="l00170"></a>00170 iNextByte(FILE *pFile)
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diff changeset 
   181
 
<a name="l00171"></a>00171 {
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   182
 
<a name="l00172"></a>00172         ULONG   ulReadOff;
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   183
 
<a name="l00173"></a>00173         <span class="keywordtype">size_t</span>  tReadLen;
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diff changeset 
   184
 
<a name="l00174"></a>00174
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diff changeset 
   185
 
<a name="l00175"></a>00175         fail(pBlockCurrent == NULL);
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diff changeset 
   186
 
<a name="l00176"></a>00176
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   187
 
<a name="l00177"></a>00177         <span class="keywordflow">if</span> (tByteNext &gt;= <span class="keyword">sizeof</span>(aucBlock) ||
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   188
 
<a name="l00178"></a>00178             ulBlockOffset + tByteNext &gt;= pBlockCurrent-&gt;tInfo.ulLength) {
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   189
 
<a name="l00179"></a>00179                 <span class="keywordflow">if</span> (ulBlockOffset + <span class="keyword">sizeof</span>(aucBlock) &lt;
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   190
 
<a name="l00180"></a>00180                                         pBlockCurrent-&gt;tInfo.ulLength) {
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diff changeset 
   191
 
<a name="l00181"></a>00181                         <span class="comment">/* Same block, next part */</span>
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   192
 
<a name="l00182"></a>00182                         ulBlockOffset += <span class="keyword">sizeof</span>(aucBlock);
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diff changeset 
   193
 
<a name="l00183"></a>00183                 } <span class="keywordflow">else</span> {
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diff changeset 
   194
 
<a name="l00184"></a>00184                         <span class="comment">/* Next block, first part */</span>
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   195
 
<a name="l00185"></a>00185                         pBlockCurrent = pBlockCurrent-&gt;pNext;
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   196
 
<a name="l00186"></a>00186                         ulBlockOffset = 0;
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   197
 
<a name="l00187"></a>00187                 }
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diff changeset 
   198
 
<a name="l00188"></a>00188                 <span class="keywordflow">if</span> (pBlockCurrent == NULL) {
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diff changeset 
   199
 
<a name="l00189"></a>00189                         <span class="comment">/* Past the last part of the last block */</span>
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   200
 
<a name="l00190"></a>00190                         errno = EIO;
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   201
 
<a name="l00191"></a>00191                         <span class="keywordflow">return</span> EOF;
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   202
 
<a name="l00192"></a>00192                 }
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   203
 
<a name="l00193"></a>00193                 tReadLen = (size_t)
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   204
 
<a name="l00194"></a>00194                                 (pBlockCurrent-&gt;tInfo.ulLength - ulBlockOffset);
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   205
 
<a name="l00195"></a>00195                 <span class="keywordflow">if</span> (tReadLen &gt; <span class="keyword">sizeof</span>(aucBlock)) {
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   206
 
<a name="l00196"></a>00196                         tReadLen = <span class="keyword">sizeof</span>(aucBlock);
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   207
 
<a name="l00197"></a>00197                 }
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   208
 
<a name="l00198"></a>00198                 ulReadOff = pBlockCurrent-&gt;tInfo.ulFileOffset + ulBlockOffset;
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   209
 
<a name="l00199"></a>00199                 <span class="keywordflow">if</span> (!bReadBytes(aucBlock, tReadLen, ulReadOff, pFile)) {
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   210
 
<a name="l00200"></a>00200                         errno = EIO;
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<a name="l00201"></a>00201                         <span class="keywordflow">return</span> EOF;
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<a name="l00202"></a>00202                 }
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<a name="l00203"></a>00203                 tByteNext = 0;
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<a name="l00204"></a>00204         }
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<a name="l00205"></a>00205         <span class="keywordflow">return</span> (<span class="keywordtype">int</span>)aucBlock[tByteNext++];
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<a name="l00206"></a>00206 } <span class="comment">/* end of iNextByte */</span>
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<a name="l00207"></a>00207
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<a name="l00208"></a>00208 <span class="comment">/*</span>
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<a name="l00209"></a>00209 <span class="comment"> * usNextWord - get the next word from the data block list</span>
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<a name="l00210"></a>00210 <span class="comment"> *</span>
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<a name="l00211"></a>00211 <span class="comment"> * Read a two byte value in Little Endian order, that means MSB last</span>
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<a name="l00212"></a>00212 <span class="comment"> *</span>
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<a name="l00213"></a>00213 <span class="comment"> * All return values can be valid so errno is set in case of error</span>
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<a name="l00214"></a>00214 <span class="comment"> */</span>
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<a name="l00215"></a>00215 USHORT
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<a name="l00216"></a>00216 usNextWord(FILE *pFile)
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<a name="l00217"></a>00217 {
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<a name="l00218"></a>00218         USHORT  usLSB, usMSB;
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<a name="l00219"></a>00219
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<a name="l00220"></a>00220         usLSB = (USHORT)iNextByte(pFile);
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<a name="l00221"></a>00221         <span class="keywordflow">if</span> (usLSB == (USHORT)EOF) {
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<a name="l00222"></a>00222                 errno = EIO;
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<a name="l00223"></a>00223                 <span class="keywordflow">return</span> (USHORT)EOF;
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<a name="l00224"></a>00224         }
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   235
 
<a name="l00225"></a>00225         usMSB = (USHORT)iNextByte(pFile);
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<a name="l00226"></a>00226         <span class="keywordflow">if</span> (usMSB == (USHORT)EOF) {
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<a name="l00227"></a>00227                 DBG_MSG(<span class="stringliteral">&quot;usNextWord: Unexpected EOF&quot;</span>);
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<a name="l00228"></a>00228                 errno = EIO;
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<a name="l00229"></a>00229                 <span class="keywordflow">return</span> (USHORT)EOF;
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<a name="l00230"></a>00230         }
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<a name="l00231"></a>00231         <span class="keywordflow">return</span> (usMSB &lt;&lt; 8) | usLSB;
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<a name="l00232"></a>00232 } <span class="comment">/* end of usNextWord */</span>
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<a name="l00233"></a>00233
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<a name="l00234"></a>00234 <span class="comment">/*</span>
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<a name="l00235"></a>00235 <span class="comment"> * ulNextLong - get the next long from the data block list</span>
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<a name="l00236"></a>00236 <span class="comment"> *</span>
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<a name="l00237"></a>00237 <span class="comment"> * Read a four byte value in Little Endian order, that means MSW last</span>
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<a name="l00238"></a>00238 <span class="comment"> *</span>
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<a name="l00239"></a>00239 <span class="comment"> * All return values can be valid so errno is set in case of error</span>
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<a name="l00240"></a>00240 <span class="comment"> */</span>
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<a name="l00241"></a>00241 ULONG
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<a name="l00242"></a>00242 ulNextLong(FILE *pFile)
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<a name="l00243"></a>00243 {
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   254
 
<a name="l00244"></a>00244         ULONG   ulLSW, ulMSW;
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<a name="l00245"></a>00245
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   256
 
<a name="l00246"></a>00246         ulLSW = (ULONG)usNextWord(pFile);
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   257
 
<a name="l00247"></a>00247         <span class="keywordflow">if</span> (ulLSW == (ULONG)EOF) {
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<a name="l00248"></a>00248                 errno = EIO;
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<a name="l00249"></a>00249                 <span class="keywordflow">return</span> (ULONG)EOF;
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<a name="l00250"></a>00250         }
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<a name="l00251"></a>00251         ulMSW = (ULONG)usNextWord(pFile);
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<a name="l00252"></a>00252         <span class="keywordflow">if</span> (ulMSW == (ULONG)EOF) {
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<a name="l00253"></a>00253                 DBG_MSG(<span class="stringliteral">&quot;ulNextLong: Unexpected EOF&quot;</span>);
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<a name="l00254"></a>00254                 errno = EIO;
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<a name="l00255"></a>00255                 <span class="keywordflow">return</span> (ULONG)EOF;
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<a name="l00256"></a>00256         }
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<a name="l00257"></a>00257         <span class="keywordflow">return</span> (ulMSW &lt;&lt; 16) | ulLSW;
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<a name="l00258"></a>00258 } <span class="comment">/* end of ulNextLong */</span>
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<a name="l00259"></a>00259
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<a name="l00260"></a>00260 <span class="comment">/*</span>
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<a name="l00261"></a>00261 <span class="comment"> * usNextWordBE - get the next two byte value</span>
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<a name="l00262"></a>00262 <span class="comment"> *</span>
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<a name="l00263"></a>00263 <span class="comment"> * Read a two byte value in Big Endian order, that means MSB first</span>
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<a name="l00264"></a>00264 <span class="comment"> *</span>
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<a name="l00265"></a>00265 <span class="comment"> * All return values can be valid so errno is set in case of error</span>
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<a name="l00266"></a>00266 <span class="comment"> */</span>
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<a name="l00267"></a>00267 USHORT
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<a name="l00268"></a>00268 usNextWordBE(FILE *pFile)
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<a name="l00269"></a>00269 {
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<a name="l00270"></a>00270         USHORT usLSB, usMSB;
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<a name="l00271"></a>00271
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<a name="l00272"></a>00272         usMSB = (USHORT)iNextByte(pFile);
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<a name="l00273"></a>00273         <span class="keywordflow">if</span> (usMSB == (USHORT)EOF) {
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<a name="l00274"></a>00274                 errno = EIO;
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<a name="l00275"></a>00275                 <span class="keywordflow">return</span> (USHORT)EOF;
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<a name="l00276"></a>00276         }
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<a name="l00277"></a>00277         usLSB = (USHORT)iNextByte(pFile);
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<a name="l00278"></a>00278         <span class="keywordflow">if</span> (usLSB == (USHORT)EOF) {
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<a name="l00279"></a>00279                 DBG_MSG(<span class="stringliteral">&quot;usNextWordBE: Unexpected EOF&quot;</span>);
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<a name="l00280"></a>00280                 errno = EIO;
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<a name="l00281"></a>00281                 <span class="keywordflow">return</span> (USHORT)EOF;
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<a name="l00282"></a>00282         }
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<a name="l00283"></a>00283         <span class="keywordflow">return</span> (usMSB &lt;&lt; 8) | usLSB;
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<a name="l00284"></a>00284 } <span class="comment">/* end of usNextWordBE */</span>
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<a name="l00285"></a>00285
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<a name="l00286"></a>00286 <span class="comment">/*</span>
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<a name="l00287"></a>00287 <span class="comment"> * ulNextLongBE - get the next four byte value</span>
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<a name="l00288"></a>00288 <span class="comment"> *</span>
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<a name="l00289"></a>00289 <span class="comment"> * Read a four byte value in Big Endian order, that means MSW first</span>
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<a name="l00290"></a>00290 <span class="comment"> *</span>
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<a name="l00291"></a>00291 <span class="comment"> * All return values can be valid so errno is set in case of error</span>
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<a name="l00292"></a>00292 <span class="comment"> */</span>
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<a name="l00293"></a>00293 ULONG
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<a name="l00294"></a>00294 ulNextLongBE(FILE *pFile)
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<a name="l00295"></a>00295 {
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<a name="l00296"></a>00296         ULONG   ulLSW, ulMSW;
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<a name="l00297"></a>00297
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<a name="l00298"></a>00298         ulMSW = (ULONG)usNextWordBE(pFile);
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<a name="l00299"></a>00299         <span class="keywordflow">if</span> (ulMSW == (ULONG)EOF) {
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<a name="l00300"></a>00300                 errno = EIO;
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<a name="l00301"></a>00301                 <span class="keywordflow">return</span> (ULONG)EOF;
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<a name="l00302"></a>00302         }
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<a name="l00303"></a>00303         ulLSW = (ULONG)usNextWordBE(pFile);
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<a name="l00304"></a>00304         <span class="keywordflow">if</span> (ulLSW == (ULONG)EOF) {
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<a name="l00305"></a>00305                 DBG_MSG(<span class="stringliteral">&quot;ulNextLongBE: Unexpected EOF&quot;</span>);
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<a name="l00306"></a>00306                 errno = EIO;
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<a name="l00307"></a>00307                 <span class="keywordflow">return</span> (ULONG)EOF;
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<a name="l00308"></a>00308         }
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<a name="l00309"></a>00309         <span class="keywordflow">return</span> (ulMSW &lt;&lt; 16) | ulLSW;
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<a name="l00310"></a>00310 } <span class="comment">/* end of ulNextLongBE */</span>
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<a name="l00311"></a>00311
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<a name="l00312"></a>00312 <span class="comment">/*</span>
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<a name="l00313"></a>00313 <span class="comment"> * tSkipBytes - skip over the given number of bytes</span>
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<a name="l00314"></a>00314 <span class="comment"> *</span>
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<a name="l00315"></a>00315 <span class="comment"> * Returns the number of skipped bytes</span>
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<a name="l00316"></a>00316 <span class="comment"> */</span>
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   327
 
<a name="l00317"></a>00317 <span class="keywordtype">size_t</span>
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<a name="l00318"></a>00318 tSkipBytes(FILE *pFile, <span class="keywordtype">size_t</span> tToSkip)
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<a name="l00319"></a>00319 {
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<a name="l00320"></a>00320         <span class="keywordtype">size_t</span>  tToGo, tMaxMove, tMove;
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<a name="l00321"></a>00321
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<a name="l00322"></a>00322         fail(pFile == NULL);
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<a name="l00323"></a>00323         fail(pBlockCurrent == NULL);
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<a name="l00324"></a>00324
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   335
 
<a name="l00325"></a>00325         tToGo = tToSkip;
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<a name="l00326"></a>00326         <span class="keywordflow">while</span> (tToGo != 0) {
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<a name="l00327"></a>00327                 <span class="comment">/* Goto the end of the current block */</span>
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<a name="l00328"></a>00328                 tMaxMove = min(<span class="keyword">sizeof</span>(aucBlock) - tByteNext,
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<a name="l00329"></a>00329                                 (<span class="keywordtype">size_t</span>)(pBlockCurrent-&gt;tInfo.ulLength -
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<a name="l00330"></a>00330                                 ulBlockOffset - tByteNext));
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<a name="l00331"></a>00331                 tMove = min(tMaxMove, tToGo);
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<a name="l00332"></a>00332                 tByteNext += tMove;
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<a name="l00333"></a>00333                 tToGo -= tMove;
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<a name="l00334"></a>00334                 <span class="keywordflow">if</span> (tToGo != 0) {
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<a name="l00335"></a>00335                         <span class="comment">/* Goto the next block */</span>
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<a name="l00336"></a>00336                         <span class="keywordflow">if</span> (iNextByte(pFile) == EOF) {
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<a name="l00337"></a>00337                                 <span class="keywordflow">return</span> tToSkip - tToGo;
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<a name="l00338"></a>00338                         }
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<a name="l00339"></a>00339                         tToGo--;
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<a name="l00340"></a>00340                 }
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<a name="l00341"></a>00341         }
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   352
 
<a name="l00342"></a>00342         <span class="keywordflow">return</span> tToSkip;
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<a name="l00343"></a>00343 } <span class="comment">/* end of tSkipBytes */</span>
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<a name="l00344"></a>00344
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   355
 
<a name="l00345"></a>00345 <span class="comment">/*</span>
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<a name="l00346"></a>00346 <span class="comment"> * Translate  a data position to an offset in the file.</span>
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<a name="l00347"></a>00347 <span class="comment"> * Logical to physical offset.</span>
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<a name="l00348"></a>00348 <span class="comment"> *</span>
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<a name="l00349"></a>00349 <span class="comment"> * Returns:     FC_INVALID: in case of error</span>
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<a name="l00350"></a>00350 <span class="comment"> *              otherwise: the computed file offset</span>
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<a name="l00351"></a>00351 <span class="comment"> */</span>
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<a name="l00352"></a>00352 ULONG
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   363
 
<a name="l00353"></a>00353 ulDataPos2FileOffset(ULONG ulDataPos)
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   364
 
<a name="l00354"></a>00354 {
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   365
 
<a name="l00355"></a>00355         data_mem_type   *pCurr;
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<a name="l00356"></a>00356
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<a name="l00357"></a>00357         fail(ulDataPos == CP_INVALID);
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<a name="l00358"></a>00358
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<a name="l00359"></a>00359         <span class="keywordflow">for</span> (pCurr = pAnchor; pCurr != NULL; pCurr = pCurr-&gt;pNext) {
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<a name="l00360"></a>00360                 <span class="keywordflow">if</span> (ulDataPos &lt; pCurr-&gt;tInfo.ulDataPos ||
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<a name="l00361"></a>00361                     ulDataPos &gt;= pCurr-&gt;tInfo.ulDataPos +
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<a name="l00362"></a>00362                      pCurr-&gt;tInfo.ulLength) {
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   373
 
<a name="l00363"></a>00363                         <span class="comment">/* The data offset is not in this block, try the next */</span>
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<a name="l00364"></a>00364                         <span class="keywordflow">continue</span>;
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<a name="l00365"></a>00365                 }
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<a name="l00366"></a>00366                 <span class="comment">/* The data offset is in the current block */</span>
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<a name="l00367"></a>00367                 <span class="keywordflow">return</span> pCurr-&gt;tInfo.ulFileOffset +
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<a name="l00368"></a>00368                                 ulDataPos -
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<a name="l00369"></a>00369                                 pCurr-&gt;tInfo.ulDataPos;
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<a name="l00370"></a>00370         }
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<a name="l00371"></a>00371         <span class="comment">/* Passed beyond the end of the list */</span>
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   382
 
<a name="l00372"></a>00372         DBG_HEX_C(ulDataPos != 0, ulDataPos);
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<a name="l00373"></a>00373         <span class="keywordflow">return</span> FC_INVALID;
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<a name="l00374"></a>00374 } <span class="comment">/* end of ulDataPos2FileOffset */</span>
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   385
 
</pre></div></div>
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   386
 
<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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   388
 
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
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</body>
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</html>
MCL/sftools/depl/docscontent