cpl__port_8h-source.html

gdal库的学习文档

<a name="l00219"></a>00219 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00220"></a>00220 <span class="preprocessor"></span><span class="preprocessor">#  define CPL_STDCALL</span>
<a name="l00221"></a>00221 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00222"></a>00222 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00223"></a>00223 <span class="preprocessor"></span>
<a name="l00224"></a>00224 <span class="preprocessor">#ifdef _MSC_VER</span>
<a name="l00225"></a>00225 <span class="preprocessor"></span><span class="preprocessor">#  define FORCE_CDECL  __cdecl</span>
<a name="l00226"></a>00226 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00227"></a>00227 <span class="preprocessor"></span><span class="preprocessor">#  define FORCE_CDECL </span>
<a name="l00228"></a>00228 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00229"></a>00229 <span class="preprocessor"></span>
<a name="l00230"></a>00230 <span class="preprocessor">#ifndef NULL</span>
<a name="l00231"></a>00231 <span class="preprocessor"></span><span class="preprocessor">#  define NULL  0</span>
<a name="l00232"></a>00232 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00233"></a>00233 <span class="preprocessor"></span>
<a name="l00234"></a>00234 <span class="preprocessor">#ifndef FALSE</span>
<a name="l00235"></a>00235 <span class="preprocessor"></span><span class="preprocessor">#  define FALSE 0</span>
<a name="l00236"></a>00236 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00237"></a>00237 <span class="preprocessor"></span>
<a name="l00238"></a>00238 <span class="preprocessor">#ifndef TRUE</span>
<a name="l00239"></a>00239 <span class="preprocessor"></span><span class="preprocessor">#  define TRUE  1</span>
<a name="l00240"></a>00240 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00241"></a>00241 <span class="preprocessor"></span>
<a name="l00242"></a>00242 <span class="preprocessor">#ifndef MAX</span>
<a name="l00243"></a>00243 <span class="preprocessor"></span><span class="preprocessor">#  define MIN(a,b)      ((a&lt;b) ? a : b)</span>
<a name="l00244"></a>00244 <span class="preprocessor"></span><span class="preprocessor">#  define MAX(a,b)      ((a&gt;b) ? a : b)</span>
<a name="l00245"></a>00245 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00246"></a>00246 <span class="preprocessor"></span>
<a name="l00247"></a>00247 <span class="preprocessor">#ifndef ABS</span>
<a name="l00248"></a>00248 <span class="preprocessor"></span><span class="preprocessor">#  define ABS(x)        ((x&lt;0) ? (-1*(x)) : x)</span>
<a name="l00249"></a>00249 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00250"></a>00250 <span class="preprocessor"></span>
<a name="l00251"></a>00251 <span class="comment">/* -------------------------------------------------------------------- */</span>
<a name="l00252"></a>00252 <span class="comment">/*      Macro to test equality of two floating point values.            */</span>
<a name="l00253"></a>00253 <span class="comment">/*      We use fabs() function instead of ABS() macro to avoid side     */</span>
<a name="l00254"></a>00254 <span class="comment">/*      effects.                                                        */</span>
<a name="l00255"></a>00255 <span class="comment">/* -------------------------------------------------------------------- */</span>
<a name="l00256"></a>00256 <span class="preprocessor">#ifndef CPLIsEqual</span>
<a name="l00257"></a>00257 <span class="preprocessor"></span><span class="preprocessor">#  define CPLIsEqual(x,y) (fabs(fabs(x) - fabs(y)) &lt; 0.0000000000001)</span>
<a name="l00258"></a>00258 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00259"></a>00259 <span class="preprocessor"></span>
<a name="l00260"></a>00260 <span class="preprocessor">#ifndef EQUAL</span>
<a name="l00261"></a>00261 <span class="preprocessor"></span><span class="preprocessor">#if defined(WIN32) || defined(WIN32CE)</span>
<a name="l00262"></a>00262 <span class="preprocessor"></span><span class="preprocessor">#  define EQUALN(a,b,n)           (strnicmp(a,b,n)==0)</span>
<a name="l00263"></a>00263 <span class="preprocessor"></span><span class="preprocessor">#  define EQUAL(a,b)              (stricmp(a,b)==0)</span>
<a name="l00264"></a>00264 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00265"></a>00265 <span class="preprocessor"></span><span class="preprocessor">#  define EQUALN(a,b,n)           (strncasecmp(a,b,n)==0)</span>
<a name="l00266"></a>00266 <span class="preprocessor"></span><span class="preprocessor">#  define EQUAL(a,b)              (strcasecmp(a,b)==0)</span>
<a name="l00267"></a>00267 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00268"></a>00268 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00269"></a>00269 <span class="preprocessor"></span>
<a name="l00270"></a>00270 <span class="preprocessor">#ifdef macos_pre10</span>
<a name="l00271"></a>00271 <span class="preprocessor"></span><span class="keywordtype">int</span> strcasecmp(<span class="keywordtype">char</span> * str1, <span class="keywordtype">char</span> * str2);
<a name="l00272"></a>00272 <span class="keywordtype">int</span> strncasecmp(<span class="keywordtype">char</span> * str1, <span class="keywordtype">char</span> * str2, <span class="keywordtype">int</span> len);
<a name="l00273"></a>00273 <span class="keywordtype">char</span> * strdup (<span class="keywordtype">char</span> *instr);
<a name="l00274"></a>00274 <span class="preprocessor">#endif</span>
<a name="l00275"></a>00275 <span class="preprocessor"></span>
<a name="l00276"></a>00276 <span class="preprocessor">#ifndef CPL_THREADLOCAL </span>
<a name="l00277"></a>00277 <span class="preprocessor"></span><span class="preprocessor">#  define CPL_THREADLOCAL </span>
<a name="l00278"></a>00278 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00279"></a>00279 <span class="preprocessor"></span>
<a name="l00280"></a>00280 <span class="comment">/* -------------------------------------------------------------------- */</span>
<a name="l00281"></a>00281 <span class="comment">/*      Handle isnan() and isinf().  Note that isinf() and isnan()      */</span>
<a name="l00282"></a>00282 <span class="comment">/*      are supposed to be macros according to C99.  Some systems       */</span>
<a name="l00283"></a>00283 <span class="comment">/*      (ie. Tru64) don't have isinf() at all, so if the macro is       */</span>
<a name="l00284"></a>00284 <span class="comment">/*      not defined we just assume nothing is infinite.  This may       */</span>
<a name="l00285"></a>00285 <span class="comment">/*      mean we have no real CPLIsInf() on systems with an isinf()      */</span>
<a name="l00286"></a>00286 <span class="comment">/*      function but no corresponding macro, but I can live with        */</span>
<a name="l00287"></a>00287 <span class="comment">/*      that since it isn't that important a test.                      */</span>
<a name="l00288"></a>00288 <span class="comment">/* -------------------------------------------------------------------- */</span>
<a name="l00289"></a>00289 <span class="preprocessor">#ifdef _MSC_VER</span>
<a name="l00290"></a>00290 <span class="preprocessor"></span><span class="preprocessor">#  define CPLIsNan(x) _isnan(x)</span>
<a name="l00291"></a>00291 <span class="preprocessor"></span><span class="preprocessor">#  define CPLIsInf(x) (!_isnan(x) &amp;&amp; !_finite(x))</span>
<a name="l00292"></a>00292 <span class="preprocessor"></span><span class="preprocessor">#  define CPLIsFinite(x) _finite(x)</span>
<a name="l00293"></a>00293 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00294"></a>00294 <span class="preprocessor"></span><span class="preprocessor">#  define CPLIsNan(x) isnan(x)</span>
<a name="l00295"></a>00295 <span class="preprocessor"></span><span class="preprocessor">#  ifdef isinf </span>
<a name="l00296"></a>00296 <span class="preprocessor"></span><span class="preprocessor">#    define CPLIsInf(x) isinf(x)</span>
<a name="l00297"></a>00297 <span class="preprocessor"></span><span class="preprocessor">#    define CPLIsFinite(x) (!isnan(x) &amp;&amp; !isinf(x))</span>
<a name="l00298"></a>00298 <span class="preprocessor"></span><span class="preprocessor">#  else</span>
<a name="l00299"></a>00299 <span class="preprocessor"></span><span class="preprocessor">#    define CPLIsInf(x)    FALSE</span>
<a name="l00300"></a>00300 <span class="preprocessor"></span><span class="preprocessor">#    define CPLIsFinite(x) (!isnan(x))</span>
<a name="l00301"></a>00301 <span class="preprocessor"></span><span class="preprocessor">#  endif</span>
<a name="l00302"></a>00302 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00303"></a>00303 <span class="preprocessor"></span>
<a name="l00304"></a>00304 <span class="comment">/*---------------------------------------------------------------------</span>
<a name="l00305"></a>00305 <span class="comment"> *                         CPL_LSB and CPL_MSB</span>
<a name="l00306"></a>00306 <span class="comment"> * Only one of these 2 macros should be defined and specifies the byte </span>
<a name="l00307"></a>00307 <span class="comment"> * ordering for the current platform.  </span>
<a name="l00308"></a>00308 <span class="comment"> * This should be defined in the Makefile, but if it is not then</span>
<a name="l00309"></a>00309 <span class="comment"> * the default is CPL_LSB (Intel ordering, LSB first).</span>
<a name="l00310"></a>00310 <span class="comment"> *--------------------------------------------------------------------*/</span>
<a name="l00311"></a>00311 <span class="preprocessor">#if defined(WORDS_BIGENDIAN) &amp;&amp; !defined(CPL_MSB) &amp;&amp; !defined(CPL_LSB)</span>
<a name="l00312"></a>00312 <span class="preprocessor"></span><span class="preprocessor">#  define CPL_MSB</span>
<a name="l00313"></a>00313 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00314"></a>00314 <span class="preprocessor"></span>
<a name="l00315"></a>00315 <span class="preprocessor">#if ! ( defined(CPL_LSB) || defined(CPL_MSB) )</span>
<a name="l00316"></a>00316 <span class="preprocessor"></span><span class="preprocessor">#define CPL_LSB</span>
<a name="l00317"></a>00317 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00318"></a>00318 <span class="preprocessor"></span>
<a name="l00319"></a>00319 <span class="preprocessor">#if defined(CPL_LSB)</span>
<a name="l00320"></a>00320 <span class="preprocessor"></span><span class="preprocessor">#  define CPL_IS_LSB 1</span>
<a name="l00321"></a>00321 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00322"></a>00322 <span class="preprocessor"></span><span class="preprocessor">#  define CPL_IS_LSB 0</span>
<a name="l00323"></a>00323 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00324"></a>00324 <span class="preprocessor"></span>
<a name="l00325"></a>00325 <span class="comment">/*---------------------------------------------------------------------</span>
<a name="l00326"></a>00326 <span class="comment"> *        Little endian &lt;==&gt; big endian byte swap macros.</span>
<a name="l00327"></a>00327 <span class="comment"> *--------------------------------------------------------------------*/</span>
<a name="l00328"></a>00328 
<a name="l00329"></a>00329 <span class="preprocessor">#define CPL_SWAP16(x) \</span>
<a name="l00330"></a>00330 <span class="preprocessor">        ((GUInt16)( \</span>
<a name="l00331"></a>00331 <span class="preprocessor">            (((GUInt16)(x) &amp; 0x00ffU) &lt;&lt; 8) | \</span>
<a name="l00332"></a>00332 <span class="preprocessor">            (((GUInt16)(x) &amp; 0xff00U) &gt;&gt; 8) ))</span>
<a name="l00333"></a>00333 <span class="preprocessor"></span>