media/libjpeg/jinclude.h

   1 /*
   2  * jinclude.h
   3  *
   4  * This file was part of the Independent JPEG Group's software:
   5  * Copyright (C) 1991-1994, Thomas G. Lane.
   6  * It was modified by The libjpeg-turbo Project to include only code relevant
   7  * to libjpeg-turbo.
   8  * For conditions of distribution and use, see the accompanying README.ijg
   9  * file.
  10  *
  11  * This file exists to provide a single place to fix any problems with
  12  * including the wrong system include files.  (Common problems are taken
  13  * care of by the standard jconfig symbols, but on really weird systems
  14  * you may have to edit this file.)
  15  *
  16  * NOTE: this file is NOT intended to be included by applications using the
  17  * JPEG library.  Most applications need only include jpeglib.h.
  18  */
  19
  20
  21 /* Include auto-config file to find out which system include files we need. */
  22
  23 #include "jconfig.h"            /* auto configuration options */
  24 #define JCONFIG_INCLUDED        /* so that jpeglib.h doesn't do it again */
  25
  26 /*
  27  * We need the NULL macro and size_t typedef.
  28  * On an ANSI-conforming system it is sufficient to include <stddef.h>.
  29  * Otherwise, we get them from <stdlib.h> or <stdio.h>; we may have to
  30  * pull in <sys/types.h> as well.
  31  * Note that the core JPEG library does not require <stdio.h>;
  32  * only the default error handler and data source/destination modules do.
  33  * But we must pull it in because of the references to FILE in jpeglib.h.
  34  * You can remove those references if you want to compile without <stdio.h>.
  35  */
  36
  37 #ifdef HAVE_STDDEF_H
  38 #include <stddef.h>
  39 #endif
  40
  41 #ifdef HAVE_STDLIB_H
  42 #include <stdlib.h>
  43 #endif
  44
  45 #ifdef NEED_SYS_TYPES_H
  46 #include <sys/types.h>
  47 #endif
  48
  49 #include <stdio.h>
  50
  51 /*
  52  * We need memory copying and zeroing functions, plus strncpy().
  53  * ANSI and System V implementations declare these in <string.h>.
  54  * BSD doesn't have the mem() functions, but it does have bcopy()/bzero().
  55  * Some systems may declare memset and memcpy in <memory.h>.
  56  *
  57  * NOTE: we assume the size parameters to these functions are of type size_t.
  58  * Change the casts in these macros if not!
  59  */
  60
  61 #ifdef NEED_BSD_STRINGS
  62
  63 #include <strings.h>
  64 #define MEMZERO(target, size) \
  65   bzero((void *)(target), (size_t)(size))
  66 #define MEMCOPY(dest, src, size) \
  67   bcopy((const void *)(src), (void *)(dest), (size_t)(size))
  68
  69 #else /* not BSD, assume ANSI/SysV string lib */
  70
  71 #include <string.h>
  72 #define MEMZERO(target, size) \
  73   memset((void *)(target), 0, (size_t)(size))
  74 #define MEMCOPY(dest, src, size) \
  75   memcpy((void *)(dest), (const void *)(src), (size_t)(size))
  76
  77 #endif
  78
  79 /*
  80  * The modules that use fread() and fwrite() always invoke them through
  81  * these macros.  On some systems you may need to twiddle the argument casts.
  82  * CAUTION: argument order is different from underlying functions!
  83  */
  84
  85 #define JFREAD(file, buf, sizeofbuf) \
  86   ((size_t)fread((void *)(buf), (size_t)1, (size_t)(sizeofbuf), (file)))
  87 #define JFWRITE(file, buf, sizeofbuf) \
  88   ((size_t)fwrite((const void *)(buf), (size_t)1, (size_t)(sizeofbuf), (file)))