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)))
89