/*

* jinclude.h

*

* Copyright (C) 1991-1994, Thomas G. Lane.

* Modified 2017 by Guido Vollbeding.

* 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!

*

* Furthermore, macros are provided for fflush() and ferror() in order

* to facilitate adaption by applications using an own FILE class.

*/

#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)))

#define JFFLUSH(file) fflush(file)

#define JFERROR(file) ferror(file)