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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