1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
|
2 <html xmlns="http://www.w3.org/1999/xhtml"> |
|
3 <head> |
|
4 <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> |
|
5 <title>TB9.2 Example Applications: examples/PIPS/antiword/src/datalist.c Source File</title> |
|
6 <link href="tabs.css" rel="stylesheet" type="text/css"/> |
|
7 <link href="doxygen.css" rel="stylesheet" type="text/css"/> |
|
8 </head> |
|
9 <body> |
|
10 <!-- Generated by Doxygen 1.6.2 --> |
|
11 <h1>examples/PIPS/antiword/src/datalist.c</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> |
|
12 <a name="l00002"></a>00002 <span class="comment"> * datalist.c</span> |
|
13 <a name="l00003"></a>00003 <span class="comment"> * Copyright (C) 2000-2002 A.J. van Os; Released under GPL</span> |
|
14 <a name="l00004"></a>00004 <span class="comment"> *</span> |
|
15 <a name="l00005"></a>00005 <span class="comment"> * Description:</span> |
|
16 <a name="l00006"></a>00006 <span class="comment"> * Build, read and destroy a list of Word data blocks</span> |
|
17 <a name="l00007"></a>00007 <span class="comment"> */</span> |
|
18 <a name="l00008"></a>00008 |
|
19 <a name="l00009"></a>00009 <span class="preprocessor">#include <stdlib.h></span> |
|
20 <a name="l00010"></a>00010 <span class="preprocessor">#include <errno.h></span> |
|
21 <a name="l00011"></a>00011 <span class="preprocessor">#include "antiword.h"</span> |
|
22 <a name="l00012"></a>00012 |
|
23 <a name="l00013"></a>00013 <span class="preprocessor">#if defined(__riscos)</span> |
|
24 <a name="l00014"></a>00014 <span class="preprocessor"></span><span class="preprocessor">#define EIO 42</span> |
|
25 <a name="l00015"></a>00015 <span class="preprocessor"></span><span class="preprocessor">#endif </span><span class="comment">/* __riscos */</span> |
|
26 <a name="l00016"></a>00016 |
|
27 <a name="l00017"></a>00017 |
|
28 <a name="l00018"></a>00018 <span class="comment">/*</span> |
|
29 <a name="l00019"></a>00019 <span class="comment"> * Private structure to hide the way the information</span> |
|
30 <a name="l00020"></a>00020 <span class="comment"> * is stored from the rest of the program</span> |
|
31 <a name="l00021"></a>00021 <span class="comment"> */</span> |
|
32 <a name="l00022"></a>00022 <span class="keyword">typedef</span> <span class="keyword">struct </span>data_mem_tag { |
|
33 <a name="l00023"></a>00023 data_block_type tInfo; |
|
34 <a name="l00024"></a>00024 <span class="keyword">struct </span>data_mem_tag *pNext; |
|
35 <a name="l00025"></a>00025 } data_mem_type; |
|
36 <a name="l00026"></a>00026 |
|
37 <a name="l00027"></a>00027 <span class="comment">/* Variable to describe the start of the data block list */</span> |
|
38 <a name="l00028"></a>00028 <span class="keyword">static</span> data_mem_type *pAnchor = NULL; |
|
39 <a name="l00029"></a>00029 <span class="comment">/* Variable needed to read the data block list */</span> |
|
40 <a name="l00030"></a>00030 <span class="keyword">static</span> data_mem_type *pBlockLast = NULL; |
|
41 <a name="l00031"></a>00031 <span class="comment">/* Variable needed to read the data block list */</span> |
|
42 <a name="l00032"></a>00032 <span class="keyword">static</span> data_mem_type *pBlockCurrent = NULL; |
|
43 <a name="l00033"></a>00033 <span class="keyword">static</span> ULONG ulBlockOffset = 0; |
|
44 <a name="l00034"></a>00034 <span class="keyword">static</span> <span class="keywordtype">size_t</span> tByteNext = 0; |
|
45 <a name="l00035"></a>00035 <span class="comment">/* Last block read */</span> |
|
46 <a name="l00036"></a>00036 <span class="keyword">static</span> UCHAR aucBlock[BIG_BLOCK_SIZE]; |
|
47 <a name="l00037"></a>00037 |
|
48 <a name="l00038"></a>00038 |
|
49 <a name="l00039"></a>00039 <span class="comment">/*</span> |
|
50 <a name="l00040"></a>00040 <span class="comment"> * vDestroyDataBlockList - destroy the data block list</span> |
|
51 <a name="l00041"></a>00041 <span class="comment"> */</span> |
|
52 <a name="l00042"></a>00042 <span class="keywordtype">void</span> |
|
53 <a name="l00043"></a>00043 vDestroyDataBlockList(<span class="keywordtype">void</span>) |
|
54 <a name="l00044"></a>00044 { |
|
55 <a name="l00045"></a>00045 data_mem_type *pCurr, *pNext; |
|
56 <a name="l00046"></a>00046 |
|
57 <a name="l00047"></a>00047 DBG_MSG(<span class="stringliteral">"vDestroyDataBlockList"</span>); |
|
58 <a name="l00048"></a>00048 |
|
59 <a name="l00049"></a>00049 pCurr = pAnchor; |
|
60 <a name="l00050"></a>00050 <span class="keywordflow">while</span> (pCurr != NULL) { |
|
61 <a name="l00051"></a>00051 pNext = pCurr->pNext; |
|
62 <a name="l00052"></a>00052 pCurr = xfree(pCurr); |
|
63 <a name="l00053"></a>00053 pCurr = pNext; |
|
64 <a name="l00054"></a>00054 } |
|
65 <a name="l00055"></a>00055 pAnchor = NULL; |
|
66 <a name="l00056"></a>00056 <span class="comment">/* Reset all the control variables */</span> |
|
67 <a name="l00057"></a>00057 pBlockLast = NULL; |
|
68 <a name="l00058"></a>00058 pBlockCurrent = NULL; |
|
69 <a name="l00059"></a>00059 ulBlockOffset = 0; |
|
70 <a name="l00060"></a>00060 tByteNext = 0; |
|
71 <a name="l00061"></a>00061 } <span class="comment">/* end of vDestroyDataBlockList */</span> |
|
72 <a name="l00062"></a>00062 |
|
73 <a name="l00063"></a>00063 <span class="comment">/*</span> |
|
74 <a name="l00064"></a>00064 <span class="comment"> * bAdd2DataBlockList - add an element to the data block list</span> |
|
75 <a name="l00065"></a>00065 <span class="comment"> *</span> |
|
76 <a name="l00066"></a>00066 <span class="comment"> * Returns TRUE when successful, otherwise FALSE</span> |
|
77 <a name="l00067"></a>00067 <span class="comment"> */</span> |
|
78 <a name="l00068"></a>00068 BOOL |
|
79 <a name="l00069"></a>00069 bAdd2DataBlockList(<span class="keyword">const</span> data_block_type *pDataBlock) |
|
80 <a name="l00070"></a>00070 { |
|
81 <a name="l00071"></a>00071 data_mem_type *pListMember; |
|
82 <a name="l00072"></a>00072 |
|
83 <a name="l00073"></a>00073 fail(pDataBlock == NULL); |
|
84 <a name="l00074"></a>00074 fail(pDataBlock->ulFileOffset == FC_INVALID); |
|
85 <a name="l00075"></a>00075 fail(pDataBlock->ulDataPos == CP_INVALID); |
|
86 <a name="l00076"></a>00076 fail(pDataBlock->ulLength == 0); |
|
87 <a name="l00077"></a>00077 |
|
88 <a name="l00078"></a>00078 NO_DBG_MSG(<span class="stringliteral">"bAdd2DataBlockList"</span>); |
|
89 <a name="l00079"></a>00079 NO_DBG_HEX(pDataBlock->ulFileOffset); |
|
90 <a name="l00080"></a>00080 NO_DBG_HEX(pDataBlock->ulDataPos); |
|
91 <a name="l00081"></a>00081 NO_DBG_HEX(pDataBlock->ulLength); |
|
92 <a name="l00082"></a>00082 |
|
93 <a name="l00083"></a>00083 <span class="keywordflow">if</span> (pDataBlock->ulFileOffset == FC_INVALID || |
|
94 <a name="l00084"></a>00084 pDataBlock->ulDataPos == CP_INVALID || |
|
95 <a name="l00085"></a>00085 pDataBlock->ulLength == 0) { |
|
96 <a name="l00086"></a>00086 werr(0, <span class="stringliteral">"Software (datablock) error"</span>); |
|
97 <a name="l00087"></a>00087 <span class="keywordflow">return</span> FALSE; |
|
98 <a name="l00088"></a>00088 } |
|
99 <a name="l00089"></a>00089 <span class="comment">/* Check for continuous blocks */</span> |
|
100 <a name="l00090"></a>00090 <span class="keywordflow">if</span> (pBlockLast != NULL && |
|
101 <a name="l00091"></a>00091 pBlockLast->tInfo.ulFileOffset + |
|
102 <a name="l00092"></a>00092 pBlockLast->tInfo.ulLength == pDataBlock->ulFileOffset && |
|
103 <a name="l00093"></a>00093 pBlockLast->tInfo.ulDataPos + |
|
104 <a name="l00094"></a>00094 pBlockLast->tInfo.ulLength == pDataBlock->ulDataPos) { |
|
105 <a name="l00095"></a>00095 <span class="comment">/* These are continous blocks */</span> |
|
106 <a name="l00096"></a>00096 pBlockLast->tInfo.ulLength += pDataBlock->ulLength; |
|
107 <a name="l00097"></a>00097 <span class="keywordflow">return</span> TRUE; |
|
108 <a name="l00098"></a>00098 } |
|
109 <a name="l00099"></a>00099 <span class="comment">/* Make a new block */</span> |
|
110 <a name="l00100"></a>00100 pListMember = xmalloc(<span class="keyword">sizeof</span>(data_mem_type)); |
|
111 <a name="l00101"></a>00101 <span class="comment">/* Add the block to the data list */</span> |
|
112 <a name="l00102"></a>00102 pListMember->tInfo = *pDataBlock; |
|
113 <a name="l00103"></a>00103 pListMember->pNext = NULL; |
|
114 <a name="l00104"></a>00104 <span class="keywordflow">if</span> (pAnchor == NULL) { |
|
115 <a name="l00105"></a>00105 pAnchor = pListMember; |
|
116 <a name="l00106"></a>00106 } <span class="keywordflow">else</span> { |
|
117 <a name="l00107"></a>00107 fail(pBlockLast == NULL); |
|
118 <a name="l00108"></a>00108 pBlockLast->pNext = pListMember; |
|
119 <a name="l00109"></a>00109 } |
|
120 <a name="l00110"></a>00110 pBlockLast = pListMember; |
|
121 <a name="l00111"></a>00111 <span class="keywordflow">return</span> TRUE; |
|
122 <a name="l00112"></a>00112 } <span class="comment">/* end of bAdd2DataBlockList */</span> |
|
123 <a name="l00113"></a>00113 |
|
124 <a name="l00114"></a>00114 <span class="comment">/*</span> |
|
125 <a name="l00115"></a>00115 <span class="comment"> * ulGetDataOffset - get the offset in the data block list</span> |
|
126 <a name="l00116"></a>00116 <span class="comment"> *</span> |
|
127 <a name="l00117"></a>00117 <span class="comment"> * Get the fileoffset the current position in the data block list</span> |
|
128 <a name="l00118"></a>00118 <span class="comment"> */</span> |
|
129 <a name="l00119"></a>00119 ULONG |
|
130 <a name="l00120"></a>00120 ulGetDataOffset(FILE *pFile) |
|
131 <a name="l00121"></a>00121 { |
|
132 <a name="l00122"></a>00122 <span class="keywordflow">return</span> pBlockCurrent->tInfo.ulFileOffset + ulBlockOffset + tByteNext; |
|
133 <a name="l00123"></a>00123 } <span class="comment">/* end of ulGetDataOffset */</span> |
|
134 <a name="l00124"></a>00124 |
|
135 <a name="l00125"></a>00125 <span class="comment">/*</span> |
|
136 <a name="l00126"></a>00126 <span class="comment"> * bSetDataOffset - set the offset in the data block list</span> |
|
137 <a name="l00127"></a>00127 <span class="comment"> *</span> |
|
138 <a name="l00128"></a>00128 <span class="comment"> * Make the given fileoffset the current position in the data block list</span> |
|
139 <a name="l00129"></a>00129 <span class="comment"> */</span> |
|
140 <a name="l00130"></a>00130 BOOL |
|
141 <a name="l00131"></a>00131 bSetDataOffset(FILE *pFile, ULONG ulFileOffset) |
|
142 <a name="l00132"></a>00132 { |
|
143 <a name="l00133"></a>00133 data_mem_type *pCurr; |
|
144 <a name="l00134"></a>00134 <span class="keywordtype">size_t</span> tReadLen; |
|
145 <a name="l00135"></a>00135 |
|
146 <a name="l00136"></a>00136 DBG_HEX(ulFileOffset); |
|
147 <a name="l00137"></a>00137 |
|
148 <a name="l00138"></a>00138 <span class="keywordflow">for</span> (pCurr = pAnchor; pCurr != NULL; pCurr = pCurr->pNext) { |
|
149 <a name="l00139"></a>00139 <span class="keywordflow">if</span> (ulFileOffset < pCurr->tInfo.ulFileOffset || |
|
150 <a name="l00140"></a>00140 ulFileOffset >= pCurr->tInfo.ulFileOffset + |
|
151 <a name="l00141"></a>00141 pCurr->tInfo.ulLength) { |
|
152 <a name="l00142"></a>00142 <span class="comment">/* The file offset is not in this block */</span> |
|
153 <a name="l00143"></a>00143 <span class="keywordflow">continue</span>; |
|
154 <a name="l00144"></a>00144 } |
|
155 <a name="l00145"></a>00145 <span class="comment">/* Compute the maximum number of bytes to read */</span> |
|
156 <a name="l00146"></a>00146 tReadLen = (size_t)(pCurr->tInfo.ulFileOffset + |
|
157 <a name="l00147"></a>00147 pCurr->tInfo.ulLength - |
|
158 <a name="l00148"></a>00148 ulFileOffset); |
|
159 <a name="l00149"></a>00149 <span class="comment">/* Compute the real number of bytes to read */</span> |
|
160 <a name="l00150"></a>00150 <span class="keywordflow">if</span> (tReadLen > <span class="keyword">sizeof</span>(aucBlock)) { |
|
161 <a name="l00151"></a>00151 tReadLen = <span class="keyword">sizeof</span>(aucBlock); |
|
162 <a name="l00152"></a>00152 } |
|
163 <a name="l00153"></a>00153 <span class="comment">/* Read the bytes */</span> |
|
164 <a name="l00154"></a>00154 <span class="keywordflow">if</span> (!bReadBytes(aucBlock, tReadLen, ulFileOffset, pFile)) { |
|
165 <a name="l00155"></a>00155 <span class="keywordflow">return</span> FALSE; |
|
166 <a name="l00156"></a>00156 } |
|
167 <a name="l00157"></a>00157 <span class="comment">/* Set the control variables */</span> |
|
168 <a name="l00158"></a>00158 pBlockCurrent = pCurr; |
|
169 <a name="l00159"></a>00159 ulBlockOffset = ulFileOffset - pCurr->tInfo.ulFileOffset; |
|
170 <a name="l00160"></a>00160 tByteNext = 0; |
|
171 <a name="l00161"></a>00161 <span class="keywordflow">return</span> TRUE; |
|
172 <a name="l00162"></a>00162 } |
|
173 <a name="l00163"></a>00163 <span class="keywordflow">return</span> FALSE; |
|
174 <a name="l00164"></a>00164 } <span class="comment">/* end of bSetDataOffset */</span> |
|
175 <a name="l00165"></a>00165 |
|
176 <a name="l00166"></a>00166 <span class="comment">/*</span> |
|
177 <a name="l00167"></a>00167 <span class="comment"> * iNextByte - get the next byte from the data block list</span> |
|
178 <a name="l00168"></a>00168 <span class="comment"> */</span> |
|
179 <a name="l00169"></a>00169 <span class="keywordtype">int</span> |
|
180 <a name="l00170"></a>00170 iNextByte(FILE *pFile) |
|
181 <a name="l00171"></a>00171 { |
|
182 <a name="l00172"></a>00172 ULONG ulReadOff; |
|
183 <a name="l00173"></a>00173 <span class="keywordtype">size_t</span> tReadLen; |
|
184 <a name="l00174"></a>00174 |
|
185 <a name="l00175"></a>00175 fail(pBlockCurrent == NULL); |
|
186 <a name="l00176"></a>00176 |
|
187 <a name="l00177"></a>00177 <span class="keywordflow">if</span> (tByteNext >= <span class="keyword">sizeof</span>(aucBlock) || |
|
188 <a name="l00178"></a>00178 ulBlockOffset + tByteNext >= pBlockCurrent->tInfo.ulLength) { |
|
189 <a name="l00179"></a>00179 <span class="keywordflow">if</span> (ulBlockOffset + <span class="keyword">sizeof</span>(aucBlock) < |
|
190 <a name="l00180"></a>00180 pBlockCurrent->tInfo.ulLength) { |
|
191 <a name="l00181"></a>00181 <span class="comment">/* Same block, next part */</span> |
|
192 <a name="l00182"></a>00182 ulBlockOffset += <span class="keyword">sizeof</span>(aucBlock); |
|
193 <a name="l00183"></a>00183 } <span class="keywordflow">else</span> { |
|
194 <a name="l00184"></a>00184 <span class="comment">/* Next block, first part */</span> |
|
195 <a name="l00185"></a>00185 pBlockCurrent = pBlockCurrent->pNext; |
|
196 <a name="l00186"></a>00186 ulBlockOffset = 0; |
|
197 <a name="l00187"></a>00187 } |
|
198 <a name="l00188"></a>00188 <span class="keywordflow">if</span> (pBlockCurrent == NULL) { |
|
199 <a name="l00189"></a>00189 <span class="comment">/* Past the last part of the last block */</span> |
|
200 <a name="l00190"></a>00190 errno = EIO; |
|
201 <a name="l00191"></a>00191 <span class="keywordflow">return</span> EOF; |
|
202 <a name="l00192"></a>00192 } |
|
203 <a name="l00193"></a>00193 tReadLen = (size_t) |
|
204 <a name="l00194"></a>00194 (pBlockCurrent->tInfo.ulLength - ulBlockOffset); |
|
205 <a name="l00195"></a>00195 <span class="keywordflow">if</span> (tReadLen > <span class="keyword">sizeof</span>(aucBlock)) { |
|
206 <a name="l00196"></a>00196 tReadLen = <span class="keyword">sizeof</span>(aucBlock); |
|
207 <a name="l00197"></a>00197 } |
|
208 <a name="l00198"></a>00198 ulReadOff = pBlockCurrent->tInfo.ulFileOffset + ulBlockOffset; |
|
209 <a name="l00199"></a>00199 <span class="keywordflow">if</span> (!bReadBytes(aucBlock, tReadLen, ulReadOff, pFile)) { |
|
210 <a name="l00200"></a>00200 errno = EIO; |
|
211 <a name="l00201"></a>00201 <span class="keywordflow">return</span> EOF; |
|
212 <a name="l00202"></a>00202 } |
|
213 <a name="l00203"></a>00203 tByteNext = 0; |
|
214 <a name="l00204"></a>00204 } |
|
215 <a name="l00205"></a>00205 <span class="keywordflow">return</span> (<span class="keywordtype">int</span>)aucBlock[tByteNext++]; |
|
216 <a name="l00206"></a>00206 } <span class="comment">/* end of iNextByte */</span> |
|
217 <a name="l00207"></a>00207 |
|
218 <a name="l00208"></a>00208 <span class="comment">/*</span> |
|
219 <a name="l00209"></a>00209 <span class="comment"> * usNextWord - get the next word from the data block list</span> |
|
220 <a name="l00210"></a>00210 <span class="comment"> *</span> |
|
221 <a name="l00211"></a>00211 <span class="comment"> * Read a two byte value in Little Endian order, that means MSB last</span> |
|
222 <a name="l00212"></a>00212 <span class="comment"> *</span> |
|
223 <a name="l00213"></a>00213 <span class="comment"> * All return values can be valid so errno is set in case of error</span> |
|
224 <a name="l00214"></a>00214 <span class="comment"> */</span> |
|
225 <a name="l00215"></a>00215 USHORT |
|
226 <a name="l00216"></a>00216 usNextWord(FILE *pFile) |
|
227 <a name="l00217"></a>00217 { |
|
228 <a name="l00218"></a>00218 USHORT usLSB, usMSB; |
|
229 <a name="l00219"></a>00219 |
|
230 <a name="l00220"></a>00220 usLSB = (USHORT)iNextByte(pFile); |
|
231 <a name="l00221"></a>00221 <span class="keywordflow">if</span> (usLSB == (USHORT)EOF) { |
|
232 <a name="l00222"></a>00222 errno = EIO; |
|
233 <a name="l00223"></a>00223 <span class="keywordflow">return</span> (USHORT)EOF; |
|
234 <a name="l00224"></a>00224 } |
|
235 <a name="l00225"></a>00225 usMSB = (USHORT)iNextByte(pFile); |
|
236 <a name="l00226"></a>00226 <span class="keywordflow">if</span> (usMSB == (USHORT)EOF) { |
|
237 <a name="l00227"></a>00227 DBG_MSG(<span class="stringliteral">"usNextWord: Unexpected EOF"</span>); |
|
238 <a name="l00228"></a>00228 errno = EIO; |
|
239 <a name="l00229"></a>00229 <span class="keywordflow">return</span> (USHORT)EOF; |
|
240 <a name="l00230"></a>00230 } |
|
241 <a name="l00231"></a>00231 <span class="keywordflow">return</span> (usMSB << 8) | usLSB; |
|
242 <a name="l00232"></a>00232 } <span class="comment">/* end of usNextWord */</span> |
|
243 <a name="l00233"></a>00233 |
|
244 <a name="l00234"></a>00234 <span class="comment">/*</span> |
|
245 <a name="l00235"></a>00235 <span class="comment"> * ulNextLong - get the next long from the data block list</span> |
|
246 <a name="l00236"></a>00236 <span class="comment"> *</span> |
|
247 <a name="l00237"></a>00237 <span class="comment"> * Read a four byte value in Little Endian order, that means MSW last</span> |
|
248 <a name="l00238"></a>00238 <span class="comment"> *</span> |
|
249 <a name="l00239"></a>00239 <span class="comment"> * All return values can be valid so errno is set in case of error</span> |
|
250 <a name="l00240"></a>00240 <span class="comment"> */</span> |
|
251 <a name="l00241"></a>00241 ULONG |
|
252 <a name="l00242"></a>00242 ulNextLong(FILE *pFile) |
|
253 <a name="l00243"></a>00243 { |
|
254 <a name="l00244"></a>00244 ULONG ulLSW, ulMSW; |
|
255 <a name="l00245"></a>00245 |
|
256 <a name="l00246"></a>00246 ulLSW = (ULONG)usNextWord(pFile); |
|
257 <a name="l00247"></a>00247 <span class="keywordflow">if</span> (ulLSW == (ULONG)EOF) { |
|
258 <a name="l00248"></a>00248 errno = EIO; |
|
259 <a name="l00249"></a>00249 <span class="keywordflow">return</span> (ULONG)EOF; |
|
260 <a name="l00250"></a>00250 } |
|
261 <a name="l00251"></a>00251 ulMSW = (ULONG)usNextWord(pFile); |
|
262 <a name="l00252"></a>00252 <span class="keywordflow">if</span> (ulMSW == (ULONG)EOF) { |
|
263 <a name="l00253"></a>00253 DBG_MSG(<span class="stringliteral">"ulNextLong: Unexpected EOF"</span>); |
|
264 <a name="l00254"></a>00254 errno = EIO; |
|
265 <a name="l00255"></a>00255 <span class="keywordflow">return</span> (ULONG)EOF; |
|
266 <a name="l00256"></a>00256 } |
|
267 <a name="l00257"></a>00257 <span class="keywordflow">return</span> (ulMSW << 16) | ulLSW; |
|
268 <a name="l00258"></a>00258 } <span class="comment">/* end of ulNextLong */</span> |
|
269 <a name="l00259"></a>00259 |
|
270 <a name="l00260"></a>00260 <span class="comment">/*</span> |
|
271 <a name="l00261"></a>00261 <span class="comment"> * usNextWordBE - get the next two byte value</span> |
|
272 <a name="l00262"></a>00262 <span class="comment"> *</span> |
|
273 <a name="l00263"></a>00263 <span class="comment"> * Read a two byte value in Big Endian order, that means MSB first</span> |
|
274 <a name="l00264"></a>00264 <span class="comment"> *</span> |
|
275 <a name="l00265"></a>00265 <span class="comment"> * All return values can be valid so errno is set in case of error</span> |
|
276 <a name="l00266"></a>00266 <span class="comment"> */</span> |
|
277 <a name="l00267"></a>00267 USHORT |
|
278 <a name="l00268"></a>00268 usNextWordBE(FILE *pFile) |
|
279 <a name="l00269"></a>00269 { |
|
280 <a name="l00270"></a>00270 USHORT usLSB, usMSB; |
|
281 <a name="l00271"></a>00271 |
|
282 <a name="l00272"></a>00272 usMSB = (USHORT)iNextByte(pFile); |
|
283 <a name="l00273"></a>00273 <span class="keywordflow">if</span> (usMSB == (USHORT)EOF) { |
|
284 <a name="l00274"></a>00274 errno = EIO; |
|
285 <a name="l00275"></a>00275 <span class="keywordflow">return</span> (USHORT)EOF; |
|
286 <a name="l00276"></a>00276 } |
|
287 <a name="l00277"></a>00277 usLSB = (USHORT)iNextByte(pFile); |
|
288 <a name="l00278"></a>00278 <span class="keywordflow">if</span> (usLSB == (USHORT)EOF) { |
|
289 <a name="l00279"></a>00279 DBG_MSG(<span class="stringliteral">"usNextWordBE: Unexpected EOF"</span>); |
|
290 <a name="l00280"></a>00280 errno = EIO; |
|
291 <a name="l00281"></a>00281 <span class="keywordflow">return</span> (USHORT)EOF; |
|
292 <a name="l00282"></a>00282 } |
|
293 <a name="l00283"></a>00283 <span class="keywordflow">return</span> (usMSB << 8) | usLSB; |
|
294 <a name="l00284"></a>00284 } <span class="comment">/* end of usNextWordBE */</span> |
|
295 <a name="l00285"></a>00285 |
|
296 <a name="l00286"></a>00286 <span class="comment">/*</span> |
|
297 <a name="l00287"></a>00287 <span class="comment"> * ulNextLongBE - get the next four byte value</span> |
|
298 <a name="l00288"></a>00288 <span class="comment"> *</span> |
|
299 <a name="l00289"></a>00289 <span class="comment"> * Read a four byte value in Big Endian order, that means MSW first</span> |
|
300 <a name="l00290"></a>00290 <span class="comment"> *</span> |
|
301 <a name="l00291"></a>00291 <span class="comment"> * All return values can be valid so errno is set in case of error</span> |
|
302 <a name="l00292"></a>00292 <span class="comment"> */</span> |
|
303 <a name="l00293"></a>00293 ULONG |
|
304 <a name="l00294"></a>00294 ulNextLongBE(FILE *pFile) |
|
305 <a name="l00295"></a>00295 { |
|
306 <a name="l00296"></a>00296 ULONG ulLSW, ulMSW; |
|
307 <a name="l00297"></a>00297 |
|
308 <a name="l00298"></a>00298 ulMSW = (ULONG)usNextWordBE(pFile); |
|
309 <a name="l00299"></a>00299 <span class="keywordflow">if</span> (ulMSW == (ULONG)EOF) { |
|
310 <a name="l00300"></a>00300 errno = EIO; |
|
311 <a name="l00301"></a>00301 <span class="keywordflow">return</span> (ULONG)EOF; |
|
312 <a name="l00302"></a>00302 } |
|
313 <a name="l00303"></a>00303 ulLSW = (ULONG)usNextWordBE(pFile); |
|
314 <a name="l00304"></a>00304 <span class="keywordflow">if</span> (ulLSW == (ULONG)EOF) { |
|
315 <a name="l00305"></a>00305 DBG_MSG(<span class="stringliteral">"ulNextLongBE: Unexpected EOF"</span>); |
|
316 <a name="l00306"></a>00306 errno = EIO; |
|
317 <a name="l00307"></a>00307 <span class="keywordflow">return</span> (ULONG)EOF; |
|
318 <a name="l00308"></a>00308 } |
|
319 <a name="l00309"></a>00309 <span class="keywordflow">return</span> (ulMSW << 16) | ulLSW; |
|
320 <a name="l00310"></a>00310 } <span class="comment">/* end of ulNextLongBE */</span> |
|
321 <a name="l00311"></a>00311 |
|
322 <a name="l00312"></a>00312 <span class="comment">/*</span> |
|
323 <a name="l00313"></a>00313 <span class="comment"> * tSkipBytes - skip over the given number of bytes</span> |
|
324 <a name="l00314"></a>00314 <span class="comment"> *</span> |
|
325 <a name="l00315"></a>00315 <span class="comment"> * Returns the number of skipped bytes</span> |
|
326 <a name="l00316"></a>00316 <span class="comment"> */</span> |
|
327 <a name="l00317"></a>00317 <span class="keywordtype">size_t</span> |
|
328 <a name="l00318"></a>00318 tSkipBytes(FILE *pFile, <span class="keywordtype">size_t</span> tToSkip) |
|
329 <a name="l00319"></a>00319 { |
|
330 <a name="l00320"></a>00320 <span class="keywordtype">size_t</span> tToGo, tMaxMove, tMove; |
|
331 <a name="l00321"></a>00321 |
|
332 <a name="l00322"></a>00322 fail(pFile == NULL); |
|
333 <a name="l00323"></a>00323 fail(pBlockCurrent == NULL); |
|
334 <a name="l00324"></a>00324 |
|
335 <a name="l00325"></a>00325 tToGo = tToSkip; |
|
336 <a name="l00326"></a>00326 <span class="keywordflow">while</span> (tToGo != 0) { |
|
337 <a name="l00327"></a>00327 <span class="comment">/* Goto the end of the current block */</span> |
|
338 <a name="l00328"></a>00328 tMaxMove = min(<span class="keyword">sizeof</span>(aucBlock) - tByteNext, |
|
339 <a name="l00329"></a>00329 (<span class="keywordtype">size_t</span>)(pBlockCurrent->tInfo.ulLength - |
|
340 <a name="l00330"></a>00330 ulBlockOffset - tByteNext)); |
|
341 <a name="l00331"></a>00331 tMove = min(tMaxMove, tToGo); |
|
342 <a name="l00332"></a>00332 tByteNext += tMove; |
|
343 <a name="l00333"></a>00333 tToGo -= tMove; |
|
344 <a name="l00334"></a>00334 <span class="keywordflow">if</span> (tToGo != 0) { |
|
345 <a name="l00335"></a>00335 <span class="comment">/* Goto the next block */</span> |
|
346 <a name="l00336"></a>00336 <span class="keywordflow">if</span> (iNextByte(pFile) == EOF) { |
|
347 <a name="l00337"></a>00337 <span class="keywordflow">return</span> tToSkip - tToGo; |
|
348 <a name="l00338"></a>00338 } |
|
349 <a name="l00339"></a>00339 tToGo--; |
|
350 <a name="l00340"></a>00340 } |
|
351 <a name="l00341"></a>00341 } |
|
352 <a name="l00342"></a>00342 <span class="keywordflow">return</span> tToSkip; |
|
353 <a name="l00343"></a>00343 } <span class="comment">/* end of tSkipBytes */</span> |
|
354 <a name="l00344"></a>00344 |
|
355 <a name="l00345"></a>00345 <span class="comment">/*</span> |
|
356 <a name="l00346"></a>00346 <span class="comment"> * Translate a data position to an offset in the file.</span> |
|
357 <a name="l00347"></a>00347 <span class="comment"> * Logical to physical offset.</span> |
|
358 <a name="l00348"></a>00348 <span class="comment"> *</span> |
|
359 <a name="l00349"></a>00349 <span class="comment"> * Returns: FC_INVALID: in case of error</span> |
|
360 <a name="l00350"></a>00350 <span class="comment"> * otherwise: the computed file offset</span> |
|
361 <a name="l00351"></a>00351 <span class="comment"> */</span> |
|
362 <a name="l00352"></a>00352 ULONG |
|
363 <a name="l00353"></a>00353 ulDataPos2FileOffset(ULONG ulDataPos) |
|
364 <a name="l00354"></a>00354 { |
|
365 <a name="l00355"></a>00355 data_mem_type *pCurr; |
|
366 <a name="l00356"></a>00356 |
|
367 <a name="l00357"></a>00357 fail(ulDataPos == CP_INVALID); |
|
368 <a name="l00358"></a>00358 |
|
369 <a name="l00359"></a>00359 <span class="keywordflow">for</span> (pCurr = pAnchor; pCurr != NULL; pCurr = pCurr->pNext) { |
|
370 <a name="l00360"></a>00360 <span class="keywordflow">if</span> (ulDataPos < pCurr->tInfo.ulDataPos || |
|
371 <a name="l00361"></a>00361 ulDataPos >= pCurr->tInfo.ulDataPos + |
|
372 <a name="l00362"></a>00362 pCurr->tInfo.ulLength) { |
|
373 <a name="l00363"></a>00363 <span class="comment">/* The data offset is not in this block, try the next */</span> |
|
374 <a name="l00364"></a>00364 <span class="keywordflow">continue</span>; |
|
375 <a name="l00365"></a>00365 } |
|
376 <a name="l00366"></a>00366 <span class="comment">/* The data offset is in the current block */</span> |
|
377 <a name="l00367"></a>00367 <span class="keywordflow">return</span> pCurr->tInfo.ulFileOffset + |
|
378 <a name="l00368"></a>00368 ulDataPos - |
|
379 <a name="l00369"></a>00369 pCurr->tInfo.ulDataPos; |
|
380 <a name="l00370"></a>00370 } |
|
381 <a name="l00371"></a>00371 <span class="comment">/* Passed beyond the end of the list */</span> |
|
382 <a name="l00372"></a>00372 DBG_HEX_C(ulDataPos != 0, ulDataPos); |
|
383 <a name="l00373"></a>00373 <span class="keywordflow">return</span> FC_INVALID; |
|
384 <a name="l00374"></a>00374 } <span class="comment">/* end of ulDataPos2FileOffset */</span> |
|
385 </pre></div></div> |
|
386 <hr size="1"/><address style="text-align: right;"><small>Generated by |
|
387 <a href="http://www.doxygen.org/index.html"> |
|
388 <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address> |
|
389 </body> |
|
390 </html> |
|