You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
91 lines
3.2 KiB
91 lines
3.2 KiB
/* |
|
* jinclude.h |
|
* |
|
* Copyright (C) 1991-1994, Thomas G. Lane. |
|
* This file is part of the Independent JPEG Group's software. |
|
* For conditions of distribution and use, see the accompanying README file. |
|
* |
|
* This file exists to provide a single place to fix any problems with |
|
* including the wrong system include files. (Common problems are taken |
|
* care of by the standard jconfig symbols, but on really weird systems |
|
* you may have to edit this file.) |
|
* |
|
* NOTE: this file is NOT intended to be included by applications using the |
|
* JPEG library. Most applications need only include jpeglib.h. |
|
*/ |
|
|
|
|
|
/* Include auto-config file to find out which system include files we need. */ |
|
|
|
#include "jconfig.h" /* auto configuration options */ |
|
#define JCONFIG_INCLUDED /* so that jpeglib.h doesn't do it again */ |
|
|
|
/* |
|
* We need the NULL macro and size_t typedef. |
|
* On an ANSI-conforming system it is sufficient to include <stddef.h>. |
|
* Otherwise, we get them from <stdlib.h> or <stdio.h>; we may have to |
|
* pull in <sys/types.h> as well. |
|
* Note that the core JPEG library does not require <stdio.h>; |
|
* only the default error handler and data source/destination modules do. |
|
* But we must pull it in because of the references to FILE in jpeglib.h. |
|
* You can remove those references if you want to compile without <stdio.h>. |
|
*/ |
|
|
|
#ifdef HAVE_STDDEF_H |
|
#include <stddef.h> |
|
#endif |
|
|
|
#ifdef HAVE_STDLIB_H |
|
#include <stdlib.h> |
|
#endif |
|
|
|
#ifdef NEED_SYS_TYPES_H |
|
#include <sys/types.h> |
|
#endif |
|
|
|
#include <stdio.h> |
|
|
|
/* |
|
* We need memory copying and zeroing functions, plus strncpy(). |
|
* ANSI and System V implementations declare these in <string.h>. |
|
* BSD doesn't have the mem() functions, but it does have bcopy()/bzero(). |
|
* Some systems may declare memset and memcpy in <memory.h>. |
|
* |
|
* NOTE: we assume the size parameters to these functions are of type size_t. |
|
* Change the casts in these macros if not! |
|
*/ |
|
|
|
#ifdef NEED_BSD_STRINGS |
|
|
|
#include <strings.h> |
|
#define MEMZERO(target,size) bzero((void *)(target), (size_t)(size)) |
|
#define MEMCOPY(dest,src,size) bcopy((const void *)(src), (void *)(dest), (size_t)(size)) |
|
|
|
#else /* not BSD, assume ANSI/SysV string lib */ |
|
|
|
#include <string.h> |
|
#define MEMZERO(target,size) memset((void *)(target), 0, (size_t)(size)) |
|
#define MEMCOPY(dest,src,size) memcpy((void *)(dest), (const void *)(src), (size_t)(size)) |
|
|
|
#endif |
|
|
|
/* |
|
* In ANSI C, and indeed any rational implementation, size_t is also the |
|
* type returned by sizeof(). However, it seems there are some irrational |
|
* implementations out there, in which sizeof() returns an int even though |
|
* size_t is defined as long or unsigned long. To ensure consistent results |
|
* we always use this SIZEOF() macro in place of using sizeof() directly. |
|
*/ |
|
|
|
#define SIZEOF(object) ((size_t) sizeof(object)) |
|
|
|
/* |
|
* The modules that use fread() and fwrite() always invoke them through |
|
* these macros. On some systems you may need to twiddle the argument casts. |
|
* CAUTION: argument order is different from underlying functions! |
|
*/ |
|
|
|
#define JFREAD(file,buf,sizeofbuf) \ |
|
((size_t) fread((void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file))) |
|
#define JFWRITE(file,buf,sizeofbuf) \ |
|
((size_t) fwrite((const void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))
|
|
|