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* jinclude.h
* Copyright (C) 1991, 1992, 1993, 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 is the central file that's #include'd by all the JPEG .c files.
* Its purpose is to provide a single place to fix any problems with
* including the wrong system include files.
* You can edit these declarations if you use a system with nonstandard
* system include files.
* Normally the __STDC__ macro can be taken as indicating that the system
* include files conform to the ANSI C standard. However, if you are running
* GCC on a machine with non-ANSI system include files, that is not the case.
* In that case change the following, or add -DNONANSI_INCLUDES to your CFLAGS.
#ifdef __STDC__
#define INCLUDES_ARE_ANSI /* this is what's tested before including */
* <stdio.h> is included to get the FILE typedef and NULL macro.
* Note that the core portable-JPEG files do not actually do any I/O
* using the stdio library; only the user interface, error handler,
* and file reading/writing modules invoke any stdio functions.
* (Well, we did cheat a bit in jmemmgr.c, but only if MEM_STATS is defined.)
#include <stdio.h>
* We need the size_t typedef, which defines the parameter type of malloc().
* In an ANSI-conforming implementation this is provided by <stdio.h>,
* but on non-ANSI systems it's more likely to be in <sys/types.h>.
* On some not-quite-ANSI systems you may find it in <stddef.h>.
#ifndef INCLUDES_ARE_ANSI /* shouldn't need this if ANSI C */
#include <sys/types.h>
#ifdef __SASC /* Amiga SAS C provides it in stddef.h. */
#include <stddef.h>
* 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.
#undef SIZEOF /* in case you included X11/xmd.h */
#define SIZEOF(object) ((size_t) sizeof(object))
* fread() and fwrite() are always invoked 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)))
* We need the memcpy() and strcmp() functions, plus memory zeroing.
* 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!
#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))
#else /* not ANSI */
#ifdef BSD
#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 Sys V or compatible */
#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 /* BSD */
#endif /* ANSI */
/* Now include the portable JPEG definition files. */
#include "jconfig.h"
#include "jpegdata.h"