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<hr><h1>cpl_conv.cpp</h1><div class="fragment"><pre>00001 <font class="comment">/******************************************************************************</font>
00002 <font class="comment"> * $Id: cpl_conv_cpp-source.html,v 1.10 2002/04/16 13:11:47 warmerda Exp $</font>
00003 <font class="comment"> *</font>
00004 <font class="comment"> * Project: CPL - Common Portability Library</font>
00005 <font class="comment"> * Purpose: Convenience functions.</font>
00006 <font class="comment"> * Author: Frank Warmerdam, warmerda@home.com</font>
00007 <font class="comment"> *</font>
00008 <font class="comment"> ******************************************************************************</font>
00009 <font class="comment"> * Copyright (c) 1998, Frank Warmerdam</font>
00010 <font class="comment"> *</font>
00011 <font class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a</font>
00012 <font class="comment"> * copy of this software and associated documentation files (the "Software"),</font>
00013 <font class="comment"> * to deal in the Software without restriction, including without limitation</font>
00014 <font class="comment"> * the rights to use, copy, modify, merge, publish, distribute, sublicense,</font>
00015 <font class="comment"> * and/or sell copies of the Software, and to permit persons to whom the</font>
00016 <font class="comment"> * Software is furnished to do so, subject to the following conditions:</font>
00017 <font class="comment"> *</font>
00018 <font class="comment"> * The above copyright notice and this permission notice shall be included</font>
00019 <font class="comment"> * in all copies or substantial portions of the Software.</font>
00020 <font class="comment"> *</font>
00021 <font class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS</font>
00022 <font class="comment"> * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</font>
00023 <font class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL</font>
00024 <font class="comment"> * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</font>
00025 <font class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING</font>
00026 <font class="comment"> * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER</font>
00027 <font class="comment"> * DEALINGS IN THE SOFTWARE.</font>
00028 <font class="comment"> ******************************************************************************</font>
00029 <font class="comment"> *</font>
00030 <font class="comment"> * $Log: cpl_conv_cpp-source.html,v $
00030 <font class="comment"> * Revision 1.10 2002/04/16 13:11:47 warmerda
00030 <font class="comment"> * updated
00030 <font class="comment"> *</font>
00031 <font class="comment"> * Revision 1.15 2002/03/05 14:26:57 warmerda</font>
00032 <font class="comment"> * expanded tabs</font>
00033 <font class="comment"> *</font>
00034 <font class="comment"> * Revision 1.14 2001/12/12 17:06:57 warmerda</font>
00035 <font class="comment"> * added CPLStat</font>
00036 <font class="comment"> *</font>
00037 <font class="comment"> * Revision 1.13 2001/07/18 04:00:49 warmerda</font>
00038 <font class="comment"> * added CPL_CVSID</font>
00039 <font class="comment"> *</font>
00040 <font class="comment"> * Revision 1.12 2001/03/09 03:19:24 danmo</font>
00041 <font class="comment"> * Set pszRLBuffer=NULL after freeing it to avoid reallocating an invalid ptr</font>
00042 <font class="comment"> *</font>
00043 <font class="comment"> * Revision 1.11 2001/03/05 03:37:19 warmerda</font>
00044 <font class="comment"> * Improve support for recovering CPLReadLine() working buffer.</font>
00045 <font class="comment"> *</font>
00046 <font class="comment"> * Revision 1.10 2001/01/19 21:16:41 warmerda</font>
00047 <font class="comment"> * expanded tabs</font>
00048 <font class="comment"> *</font>
00049 <font class="comment"> * Revision 1.9 2000/04/17 15:56:11 warmerda</font>
00050 <font class="comment"> * make configuration tests always happen</font>
00051 <font class="comment"> *</font>
00052 <font class="comment"> * Revision 1.8 2000/04/05 21:02:47 warmerda</font>
00053 <font class="comment"> * Added CPLVerifyConfiguration()</font>
00054 <font class="comment"> *</font>
00055 <font class="comment"> * Revision 1.7 1999/08/27 12:55:39 danmo</font>
00056 <font class="comment"> * Support 0 bytes allocations in CPLRealloc()</font>
00057 <font class="comment"> *</font>
00058 <font class="comment"> * Revision 1.6 1999/06/25 04:38:03 warmerda</font>
00059 <font class="comment"> * Fixed CPLReadLine() to work for long lines.</font>
00060 <font class="comment"> *</font>
00061 <font class="comment"> * Revision 1.5 1999/05/20 02:54:37 warmerda</font>
00062 <font class="comment"> * Added API documentation</font>
00063 <font class="comment"> *</font>
00064 <font class="comment"> * Revision 1.4 1999/01/02 20:29:53 warmerda</font>
00065 <font class="comment"> * Allow zero length allocations</font>
00066 <font class="comment"> *</font>
00067 <font class="comment"> * Revision 1.3 1998/12/15 19:01:07 warmerda</font>
00068 <font class="comment"> * Added CPLReadLine().</font>
00069 <font class="comment"> *</font>
00070 <font class="comment"> * Revision 1.2 1998/12/03 18:30:04 warmerda</font>
00071 <font class="comment"> * Use CPLError() instead of GPSError().</font>
00072 <font class="comment"> *</font>
00073 <font class="comment"> * Revision 1.1 1998/12/02 19:33:23 warmerda</font>
00074 <font class="comment"> * New</font>
00075 <font class="comment"> *</font>
00076 <font class="comment"> */</font>
00077
00078 <font class="preprocessor">#include "<a class="code" href="cpl_conv_h.html">cpl_conv.h</a>"</font>
00079
00080 CPL_CVSID(<font class="stringliteral">"$Id: cpl_conv_cpp-source.html,v 1.10 2002/04/16 13:11:47 warmerda Exp $"</font>);
00081
00082 <font class="comment">/************************************************************************/</font>
00083 <font class="comment">/* CPLCalloc() */</font>
00084 <font class="comment">/************************************************************************/</font>
00085
00103 <font class="keywordtype">void</font> *<a class="code" href="cpl_conv_h.html#a4">CPLCalloc</a>( size_t nCount, size_t nSize )<font class="keyword"></font>
00104 <font class="keyword"></font>
00105 <font class="keyword"></font>{
00106 <font class="keywordtype">void</font> *pReturn;
00107
00108 <font class="keywordflow">if</font>( nSize * nCount == 0 )
00109 <font class="keywordflow">return</font> NULL;
00110
00111 pReturn = VSICalloc( nCount, nSize );
00112 <font class="keywordflow">if</font>( pReturn == NULL )
00113 {
00114 <a class="code" href="cpl_error_h.html#a17">CPLError</a>( CE_Fatal, CPLE_OutOfMemory,
00115 <font class="stringliteral">"CPLCalloc(): Out of memory allocating %d bytes.\n"</font>,
00116 nSize * nCount );
00117 }
00118
00119 <font class="keywordflow">return</font> pReturn;
00120 }
00121
00122 <font class="comment">/************************************************************************/</font>
00123 <font class="comment">/* CPLMalloc() */</font>
00124 <font class="comment">/************************************************************************/</font>
00125
00141 <font class="keywordtype">void</font> *<a class="code" href="cpl_conv_h.html#a3">CPLMalloc</a>( size_t nSize )<font class="keyword"></font>
00142 <font class="keyword"></font>
00143 <font class="keyword"></font>{
00144 <font class="keywordtype">void</font> *pReturn;
00145
00146 CPLVerifyConfiguration();
00147
00148 <font class="keywordflow">if</font>( nSize == 0 )
00149 <font class="keywordflow">return</font> NULL;
00150
00151 pReturn = VSIMalloc( nSize );
00152 <font class="keywordflow">if</font>( pReturn == NULL )
00153 {
00154 <a class="code" href="cpl_error_h.html#a17">CPLError</a>( CE_Fatal, CPLE_OutOfMemory,
00155 <font class="stringliteral">"CPLMalloc(): Out of memory allocating %d bytes.\n"</font>,
00156 nSize );
00157 }
00158
00159 <font class="keywordflow">return</font> pReturn;
00160 }
00161
00162 <font class="comment">/************************************************************************/</font>
00163 <font class="comment">/* CPLRealloc() */</font>
00164 <font class="comment">/************************************************************************/</font>
00165
00186 <font class="keywordtype">void</font> * <a class="code" href="cpl_conv_h.html#a5">CPLRealloc</a>( <font class="keywordtype">void</font> * pData, size_t nNewSize )<font class="keyword"></font>
00187 <font class="keyword"></font>
00188 <font class="keyword"></font>{
00189 <font class="keywordtype">void</font> *pReturn;
00190
00191 <font class="keywordflow">if</font> ( nNewSize == 0 )
00192 {
00193 VSIFree(pData);
00194 <font class="keywordflow">return</font> NULL;
00195 }
00196
00197 <font class="keywordflow">if</font>( pData == NULL )
00198 pReturn = VSIMalloc( nNewSize );
00199 <font class="keywordflow">else</font>
00200 pReturn = VSIRealloc( pData, nNewSize );
00201
00202 <font class="keywordflow">if</font>( pReturn == NULL )
00203 {
00204 <a class="code" href="cpl_error_h.html#a17">CPLError</a>( CE_Fatal, CPLE_OutOfMemory,
00205 <font class="stringliteral">"CPLRealloc(): Out of memory allocating %d bytes.\n"</font>,
00206 nNewSize );
00207 }
00208
00209 <font class="keywordflow">return</font> pReturn;
00210 }
00211
00212 <font class="comment">/************************************************************************/</font>
00213 <font class="comment">/* CPLStrdup() */</font>
00214 <font class="comment">/************************************************************************/</font>
00215
00234 <font class="keywordtype">char</font> *<a class="code" href="cpl_conv_h.html#a6">CPLStrdup</a>( <font class="keyword">const</font> <font class="keywordtype">char</font> * pszString )<font class="keyword"></font>
00235 <font class="keyword"></font>
00236 <font class="keyword"></font>{
00237 <font class="keywordtype">char</font> *pszReturn;
00238
00239 <font class="keywordflow">if</font>( pszString == NULL )
00240 pszString = <font class="stringliteral">""</font>;
00241
00242 pszReturn = VSIStrdup( pszString );
00243
00244 <font class="keywordflow">if</font>( pszReturn == NULL )
00245 {
00246 <a class="code" href="cpl_error_h.html#a17">CPLError</a>( CE_Fatal, CPLE_OutOfMemory,
00247 <font class="stringliteral">"CPLStrdup(): Out of memory allocating %d bytes.\n"</font>,
00248 strlen(pszString) );
00249
00250 }
00251
00252 <font class="keywordflow">return</font>( pszReturn );
00253 }
00254
00255 <font class="comment">/************************************************************************/</font>
00256 <font class="comment">/* CPLReadLine() */</font>
00257 <font class="comment">/************************************************************************/</font>
00258
00280 <font class="keyword">const</font> <font class="keywordtype">char</font> *<a class="code" href="cpl_conv_h.html#a7">CPLReadLine</a>( FILE * fp )<font class="keyword"></font>
00281 <font class="keyword"></font>
00282 <font class="keyword"></font>{
00283 <font class="keyword">static</font> <font class="keywordtype">char</font> *pszRLBuffer = NULL;
00284 <font class="keyword">static</font> <font class="keywordtype">int</font> nRLBufferSize = 0;
00285 <font class="keywordtype">int</font> nLength, nReadSoFar = 0;
00286
00287 <font class="comment">/* -------------------------------------------------------------------- */</font>
00288 <font class="comment">/* Cleanup case. */</font>
00289 <font class="comment">/* -------------------------------------------------------------------- */</font>
00290 <font class="keywordflow">if</font>( fp == NULL )
00291 {
00292 CPLFree( pszRLBuffer );
00293 pszRLBuffer = NULL;
00294 nRLBufferSize = 0;
00295 <font class="keywordflow">return</font> NULL;
00296 }
00297
00298 <font class="comment">/* -------------------------------------------------------------------- */</font>
00299 <font class="comment">/* Loop reading chunks of the line till we get to the end of */</font>
00300 <font class="comment">/* the line. */</font>
00301 <font class="comment">/* -------------------------------------------------------------------- */</font>
00302 <font class="keywordflow">do</font> {
00303 <font class="comment">/* -------------------------------------------------------------------- */</font>
00304 <font class="comment">/* Grow the working buffer if we have it nearly full. Fail out */</font>
00305 <font class="comment">/* of read line if we can't reallocate it big enough (for */</font>
00306 <font class="comment">/* instance for a _very large_ file with no newlines). */</font>
00307 <font class="comment">/* -------------------------------------------------------------------- */</font>
00308 <font class="keywordflow">if</font>( nRLBufferSize-nReadSoFar < 128 )
00309 {
00310 nRLBufferSize = nRLBufferSize*2 + 128;
00311 pszRLBuffer = (<font class="keywordtype">char</font> *) VSIRealloc(pszRLBuffer, nRLBufferSize);
00312 <font class="keywordflow">if</font>( pszRLBuffer == NULL )
00313 {
00314 nRLBufferSize = 0;
00315 <font class="keywordflow">return</font> NULL;
00316 }
00317 }
00318
00319 <font class="comment">/* -------------------------------------------------------------------- */</font>
00320 <font class="comment">/* Do the actual read. */</font>
00321 <font class="comment">/* -------------------------------------------------------------------- */</font>
00322 <font class="keywordflow">if</font>( VSIFGets( pszRLBuffer+nReadSoFar, nRLBufferSize-nReadSoFar, fp )
00323 == NULL )
00324 {
00325 CPLFree( pszRLBuffer );
00326 pszRLBuffer = NULL;
00327 nRLBufferSize = 0;
00328
00329 <font class="keywordflow">return</font> NULL;
00330 }
00331
00332 nReadSoFar = strlen(pszRLBuffer);
00333
00334 } <font class="keywordflow">while</font>( nReadSoFar == nRLBufferSize - 1
00335 && pszRLBuffer[nRLBufferSize-2] != 13
00336 && pszRLBuffer[nRLBufferSize-2] != 10 );
00337
00338 <font class="comment">/* -------------------------------------------------------------------- */</font>
00339 <font class="comment">/* Clear CR and LF off the end. */</font>
00340 <font class="comment">/* -------------------------------------------------------------------- */</font>
00341 nLength = strlen(pszRLBuffer);
00342 <font class="keywordflow">if</font>( nLength > 0
00343 && (pszRLBuffer[nLength-1] == 10 || pszRLBuffer[nLength-1] == 13) )
00344 {
00345 pszRLBuffer[--nLength] = <font class="charliteral">'\0'</font>;
00346 }
00347
00348 <font class="keywordflow">if</font>( nLength > 0
00349 && (pszRLBuffer[nLength-1] == 10 || pszRLBuffer[nLength-1] == 13) )
00350 {
00351 pszRLBuffer[--nLength] = <font class="charliteral">'\0'</font>;
00352 }
00353
00354 <font class="keywordflow">return</font>( pszRLBuffer );
00355 }
00356
00357 <font class="comment">/************************************************************************/</font>
00358 <font class="comment">/* CPLVerifyConfiguration() */</font>
00359 <font class="comment">/************************************************************************/</font>
00360
00361 <font class="keywordtype">void</font> CPLVerifyConfiguration()<font class="keyword"></font>
00362 <font class="keyword"></font>
00363 <font class="keyword"></font>{
00364 <font class="comment">/* -------------------------------------------------------------------- */</font>
00365 <font class="comment">/* Verify data types. */</font>
00366 <font class="comment">/* -------------------------------------------------------------------- */</font>
00367 CPLAssert( <font class="keyword">sizeof</font>(GInt32) == 4 );
00368 CPLAssert( <font class="keyword">sizeof</font>(GInt16) == 2 );
00369 CPLAssert( <font class="keyword">sizeof</font>(GByte) == 1 );
00370
00371 <font class="keywordflow">if</font>( <font class="keyword">sizeof</font>(GInt32) != 4 )
00372 <a class="code" href="cpl_error_h.html#a17">CPLError</a>( CE_Fatal, CPLE_AppDefined,
00373 <font class="stringliteral">"sizeof(GInt32) == %d ... yow!\n"</font>,
00374 <font class="keyword">sizeof</font>(GInt32) );
00375
00376 <font class="comment">/* -------------------------------------------------------------------- */</font>
00377 <font class="comment">/* Verify byte order */</font>
00378 <font class="comment">/* -------------------------------------------------------------------- */</font>
00379 GInt32 nTest;
00380
00381 nTest = 1;
00382
00383 <font class="preprocessor">#ifdef CPL_LSB</font>
00384 <font class="preprocessor"></font> <font class="keywordflow">if</font>( ((GByte *) &nTest)[0] != 1 )
00385 <font class="preprocessor">#endif</font>
00386 <font class="preprocessor"></font><font class="preprocessor">#ifdef CPL_MSB</font>
00387 <font class="preprocessor"></font> <font class="keywordflow">if</font>( ((GByte *) &nTest)[3] != 1 )
00388 <font class="preprocessor">#endif </font>
00389 <font class="preprocessor"></font> <a class="code" href="cpl_error_h.html#a17">CPLError</a>( CE_Fatal, CPLE_AppDefined,
00390 <font class="stringliteral">"CPLVerifyConfiguration(): byte order set wrong.\n"</font> );
00391 }
00392
00393 <font class="comment">/************************************************************************/</font>
00394 <font class="comment">/* CPLStat() */</font>
00395 <font class="comment">/* */</font>
00396 <font class="comment">/* Same as VSIStat() except it works on "C:" as if it were */</font>
00397 <font class="comment">/* "C:\". */</font>
00398 <font class="comment">/************************************************************************/</font>
00399
00400 <font class="keywordtype">int</font> CPLStat( <font class="keyword">const</font> <font class="keywordtype">char</font> *pszPath, VSIStatBuf *psStatBuf )<font class="keyword"></font>
00401 <font class="keyword"></font>
00402 <font class="keyword"></font>{
00403 <font class="keywordflow">if</font>( strlen(pszPath) == 2 && pszPath[1] == <font class="charliteral">':'</font> )
00404 {
00405 <font class="keywordtype">char</font> szAltPath[10];
00406
00407 strcpy( szAltPath, pszPath );
00408 strcat( szAltPath, <font class="stringliteral">"\\"</font> );
00409 <font class="keywordflow">return</font> VSIStat( szAltPath, psStatBuf );
00410 }
00411 <font class="keywordflow">else</font>
00412 <font class="keywordflow">return</font> VSIStat( pszPath, psStatBuf );
00413 }
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