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cpl_port.h

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00001 /******************************************************************************
00002  * Copyright (c) 1998, Frank Warmerdam
00003  *
00004  * Permission is hereby granted, free of charge, to any person obtaining a
00005  * copy of this software and associated documentation files (the "Software"),
00006  * to deal in the Software without restriction, including without limitation
00007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
00008  * and/or sell copies of the Software, and to permit persons to whom the
00009  * Software is furnished to do so, subject to the following conditions:
00010  *
00011  * The above copyright notice and this permission notice shall be included
00012  * in all copies or substantial portions of the Software.
00013  *
00014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
00015  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
00017  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00018  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
00019  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
00020  * DEALINGS IN THE SOFTWARE.
00021  ******************************************************************************
00022  *
00023  * cpl_port.h
00024  *
00025  * Include file providing low level portability services for CPL.  This
00026  * should be the first include file for any CPL based code.  It provides the
00027  * following:
00028  *
00029  * o Includes some standard system include files, such as stdio, and stdlib.
00030  *
00031  * o Defines CPL_C_START, CPL_C_END macros.
00032  *
00033  * o Ensures that some other standard macros like NULL are defined.
00034  *
00035  * o Defines some portability stuff like CPL_MSB, or CPL_LSB.
00036  *
00037  * o Ensures that core types such as GBool, GInt32, GInt16, GUInt32, 
00038  *   GUInt16, and GByte are defined.
00039  *
00040  * $Log: cpl_port_h-source.html,v $
00040  * Revision 1.1  2000/09/25 20:50:11  warmerda
00040  * New
00040  *
00041  * Revision 1.18  2000/07/20 13:15:03  warmerda
00042  * don't redeclare CPL_DLL
00043  *
00044  * Revision 1.17  2000/07/06 20:30:03  warmerda
00045  * Removed extra NULL definition.
00046  *
00047  * Revision 1.16  2000/04/26 18:25:10  warmerda
00048  * implement CPL_DLL
00049  *
00050  * Revision 1.15  2000/01/29 22:31:02  warmerda
00051  * Define WIN32 if _WINDOWS is defined.
00052  *
00053  * Revision 1.14  1999/09/21 13:39:54  warmerda
00054  * Added some more swapping macros.
00055  *
00056  * Revision 1.13  1999/05/20 02:54:38  warmerda
00057  * Added API documentation
00058  *
00059  * Revision 1.12  1999/05/14 20:35:03  warmerda
00060  * added some more swapping macros
00061  *
00062  * Revision 1.11  1999/05/13 19:19:06  warmerda
00063  * Only use dbmalloc if DEBUG is set.
00064  *
00065  * Revision 1.10  1999/03/02 21:08:11  warmerda
00066  * autoconf switch
00067  *
00068  * Revision 1.9  1999/02/17 01:41:17  warmerda
00069  * Added NULL.
00070  *
00071  * Revision 1.8  1999/02/02 21:32:38  warmerda
00072  * Added CPL_{MSB,LSB}WORD{16,32} macros.
00073  *
00074  * Revision 1.7  1999/02/02 19:02:36  warmerda
00075  * Removed duplicates of base types, and CPL_LSB
00076  *
00077  * Revision 1.6  1999/01/28 18:36:06  warmerda
00078  * Ensure WIN32 is defined on Windows.
00079  *
00080  * Revision 1.5  1999/01/28 05:26:12  danmo
00081  * Added byte swapping macros.
00082  *
00083  * Revision 1.4  1998/12/15 19:05:30  warmerda
00084  * added errno.h
00085  *
00086  * Revision 1.3  1998/12/14 04:50:07  warmerda
00087  * Added DBMALLOC support
00088  *
00089  * Revision 1.2  1998/12/04 21:38:40  danmo
00090  * Changed str*casecmp() to str*icmp() for WIN32
00091  *
00092  * Revision 1.1  1998/12/03 18:26:02  warmerda
00093  * New
00094  *
00095  */
00096 
00097 #ifndef CPL_BASE_H_INCLUDED
00098 #define CPL_BASE_H_INCLUDED
00099 
00107 /* ==================================================================== */
00108 /*      We will use WIN32 as a standard windows define.                 */
00109 /* ==================================================================== */
00110 #if defined(_WIN32) && !defined(WIN32)
00111 #  define WIN32
00112 #endif
00113 
00114 #if defined(_WINDOWS) && !defined(WIN32)
00115 #  define WIN32
00116 #endif
00117 
00118 /* ==================================================================== */
00119 /*      Standard include files.                                         */
00120 /* ==================================================================== */
00121 
00122 #include "cpl_config.h"
00123 
00124 #include <stdio.h>
00125 #include <stdlib.h>
00126 #include <math.h>
00127 #include <stdarg.h>
00128 #include <string.h>
00129 #include <errno.h>
00130 
00131 #if defined(HAVE_LIBDBMALLOC) && defined(HAVE_DBMALLOC_H) && defined(DEBUG)
00132 #  define DBMALLOC
00133 #  include <dbmalloc.h>
00134 #endif
00135 
00136 #if !defined(DBMALLOC) && defined(HAVE_DMALLOC_H)
00137 #  define USE_DMALLOC
00138 #  include <dmalloc.h>
00139 #endif
00140 
00141 /* ==================================================================== */
00142 /*      Base portability stuff ... this stuff may need to be            */
00143 /*      modified for new platforms.                                     */
00144 /* ==================================================================== */
00145 
00146 /*---------------------------------------------------------------------
00147  *        types for 16 and 32 bits integers, etc...
00148  *--------------------------------------------------------------------*/
00149 #if UINT_MAX == 65535
00150 typedef long            GInt32;
00151 typedef unsigned long   GUInt32;
00152 #else
00153 typedef int             GInt32;
00154 typedef unsigned int    GUInt32;
00155 #endif
00156 
00157 typedef short           GInt16;
00158 typedef unsigned short  GUInt16;
00159 typedef unsigned char   GByte;
00160 typedef int             GBool;
00161 
00162 
00163 /* ==================================================================== */
00164 /*      Other standard services.                                        */
00165 /* ==================================================================== */
00166 #ifdef __cplusplus
00167 #  define CPL_C_START           extern "C" {
00168 #  define CPL_C_END             }
00169 #else
00170 #  define CPL_C_START
00171 #  define CPL_C_END
00172 #endif
00173 
00174 #ifndef CPL_DLL
00175 #if defined(WIN32) && !defined(CPL_DISABLE_DLL)
00176 #  define CPL_DLL     __declspec(dllexport)
00177 #else
00178 #  define CPL_DLL
00179 #endif
00180 #endif
00181 
00182 
00183 #ifndef NULL
00184 #  define NULL  0
00185 #endif
00186 
00187 #ifndef FALSE
00188 #  define FALSE 0
00189 #endif
00190 
00191 #ifndef TRUE
00192 #  define TRUE  1
00193 #endif
00194 
00195 #ifndef MAX
00196 #  define MIN(a,b)      ((a<b) ? a : b)
00197 #  define MAX(a,b)      ((a>b) ? a : b)
00198 #endif
00199 
00200 #ifndef ABS
00201 #  define ABS(x)        ((x<0) ? (-1*(x)) : x)
00202 #endif
00203 
00204 #ifndef EQUAL
00205 #ifdef WIN32
00206 #  define EQUALN(a,b,n)           (strnicmp(a,b,n)==0)
00207 #  define EQUAL(a,b)              (stricmp(a,b)==0)
00208 #else
00209 #  define EQUALN(a,b,n)           (strncasecmp(a,b,n)==0)
00210 #  define EQUAL(a,b)              (strcasecmp(a,b)==0)
00211 #endif
00212 #endif
00213 
00214 /*---------------------------------------------------------------------
00215  *                         CPL_LSB and CPL_MSB
00216  * Only one of these 2 macros should be defined and specifies the byte 
00217  * ordering for the current platform.  
00218  * This should be defined in the Makefile, but if it is not then
00219  * the default is CPL_LSB (Intel ordering, LSB first).
00220  *--------------------------------------------------------------------*/
00221 #if defined(WORDS_BIGENDIAN) && !defined(CPL_MSB) && !defined(CPL_LSB)
00222 #  define CPL_MSB
00223 #endif
00224 
00225 #if ! ( defined(CPL_LSB) || defined(CPL_MSB) )
00226 #define CPL_LSB
00227 #endif
00228 
00229 /*---------------------------------------------------------------------
00230  *        Little endian <==> big endian byte swap macros.
00231  *--------------------------------------------------------------------*/
00232 
00233 #define CPL_SWAP16(x) \
00234         ((GUInt16)( \
00235             (((GUInt16)(x) & 0x00ffU) << 8) | \
00236             (((GUInt16)(x) & 0xff00U) >> 8) ))
00237 
00238 #define CPL_SWAP32(x) \
00239         ((GUInt32)( \
00240             (((GUInt32)(x) & (GUInt32)0x000000ffUL) << 24) | \
00241             (((GUInt32)(x) & (GUInt32)0x0000ff00UL) <<  8) | \
00242             (((GUInt32)(x) & (GUInt32)0x00ff0000UL) >>  8) | \
00243             (((GUInt32)(x) & (GUInt32)0xff000000UL) >> 24) ))
00244 
00245 #define CPL_SWAP32PTR(x) \
00246 {                                                               \
00247     GByte       byTemp, *pabyData = (GByte *) (x);              \
00248                                                                 \
00249     byTemp = pabyData[0];                                       \
00250     pabyData[0] = pabyData[3];                                  \
00251     pabyData[3] = byTemp;                                       \
00252     byTemp = pabyData[1];                                       \
00253     pabyData[1] = pabyData[2];                                  \
00254     pabyData[2] = byTemp;                                       \
00255 }                                                                    
00256                                                             
00257 #define CPL_SWAP64PTR(x) \
00258 {                                                               \
00259     GByte       byTemp, *pabyData = (GByte *) (x);              \
00260                                                                 \
00261     byTemp = pabyData[0];                                       \
00262     pabyData[0] = pabyData[7];                                  \
00263     pabyData[7] = byTemp;                                       \
00264     byTemp = pabyData[1];                                       \
00265     pabyData[1] = pabyData[6];                                  \
00266     pabyData[6] = byTemp;                                       \
00267     byTemp = pabyData[2];                                       \
00268     pabyData[2] = pabyData[5];                                  \
00269     pabyData[5] = byTemp;                                       \
00270     byTemp = pabyData[3];                                       \
00271     pabyData[3] = pabyData[4];                                  \
00272     pabyData[4] = byTemp;                                       \
00273 }                                                                    
00274                                                             
00275 
00276 /* Until we have a safe 64 bits integer data type defined, we'll replace
00277 m * this version of the CPL_SWAP64() macro with a less efficient one.
00278  */
00279 /*
00280 #define CPL_SWAP64(x) \
00281         ((uint64)( \
00282             (uint64)(((uint64)(x) & (uint64)0x00000000000000ffULL) << 56) | \
00283             (uint64)(((uint64)(x) & (uint64)0x000000000000ff00ULL) << 40) | \
00284             (uint64)(((uint64)(x) & (uint64)0x0000000000ff0000ULL) << 24) | \
00285             (uint64)(((uint64)(x) & (uint64)0x00000000ff000000ULL) << 8) | \
00286             (uint64)(((uint64)(x) & (uint64)0x000000ff00000000ULL) >> 8) | \
00287             (uint64)(((uint64)(x) & (uint64)0x0000ff0000000000ULL) >> 24) | \
00288             (uint64)(((uint64)(x) & (uint64)0x00ff000000000000ULL) >> 40) | \
00289             (uint64)(((uint64)(x) & (uint64)0xff00000000000000ULL) >> 56) ))
00290 */
00291 
00292 #define CPL_SWAPDOUBLE(p) {                             \
00293         double _tmp = *(double *)(p);                     \
00294         ((GByte *)(p))[0] = ((GByte *)&_tmp)[7];          \
00295         ((GByte *)(p))[1] = ((GByte *)&_tmp)[6];          \
00296         ((GByte *)(p))[2] = ((GByte *)&_tmp)[5];          \
00297         ((GByte *)(p))[3] = ((GByte *)&_tmp)[4];          \
00298         ((GByte *)(p))[4] = ((GByte *)&_tmp)[3];          \
00299         ((GByte *)(p))[5] = ((GByte *)&_tmp)[2];          \
00300         ((GByte *)(p))[6] = ((GByte *)&_tmp)[1];          \
00301         ((GByte *)(p))[7] = ((GByte *)&_tmp)[0];          \
00302 }
00303 
00304 #ifdef CPL_MSB
00305 #  define CPL_MSBWORD16(x)      (x)
00306 #  define CPL_LSBWORD16(x)      CPL_SWAP16(x)
00307 #  define CPL_MSBWORD32(x)      (x)
00308 #  define CPL_LSBWORD32(x)      CPL_SWAP32(x)
00309 #  define CPL_MSBPTR32(x)       
00310 #  define CPL_LSBPTR32(x)       CPL_SWAP32PTR(x)
00311 #  define CPL_MSBPTR64(x)       
00312 #  define CPL_LSBPTR64(x)       CPL_SWAP64PTR(x)
00313 #else
00314 #  define CPL_LSBWORD16(x)      (x)
00315 #  define CPL_MSBWORD16(x)      CPL_SWAP16(x)
00316 #  define CPL_LSBWORD32(x)      (x)
00317 #  define CPL_MSBWORD32(x)      CPL_SWAP32(x)
00318 #  define CPL_LSBPTR32(x)       
00319 #  define CPL_MSBPTR32(x)       CPL_SWAP32PTR(x)
00320 #  define CPL_LSBPTR64(x)       
00321 #  define CPL_MSBPTR64(x)       CPL_SWAP64PTR(x)
00322 #endif
00323 
00324 #endif /* ndef CPL_BASE_H_INCLUDED */

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