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