jinclude.h - vx32 - Local 9vx git repository for patches.
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       jinclude.h (3250B)
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            1 /*
            2  * jinclude.h
            3  *
            4  * Copyright (C) 1991-1994, Thomas G. Lane.
            5  * This file is part of the Independent JPEG Group's software.
            6  * For conditions of distribution and use, see the accompanying README file.
            7  *
            8  * This file exists to provide a single place to fix any problems with
            9  * including the wrong system include files.  (Common problems are taken
           10  * care of by the standard jconfig symbols, but on really weird systems
           11  * you may have to edit this file.)
           12  *
           13  * NOTE: this file is NOT intended to be included by applications using the
           14  * JPEG library.  Most applications need only include jpeglib.h.
           15  */
           16 
           17 
           18 /* Include auto-config file to find out which system include files we need. */
           19 
           20 #include "jconfig.h"                /* auto configuration options */
           21 #define JCONFIG_INCLUDED        /* so that jpeglib.h doesn't do it again */
           22 
           23 /*
           24  * We need the NULL macro and size_t typedef.
           25  * On an ANSI-conforming system it is sufficient to include <stddef.h>.
           26  * Otherwise, we get them from <stdlib.h> or <stdio.h>; we may have to
           27  * pull in <sys/types.h> as well.
           28  * Note that the core JPEG library does not require <stdio.h>;
           29  * only the default error handler and data source/destination modules do.
           30  * But we must pull it in because of the references to FILE in jpeglib.h.
           31  * You can remove those references if you want to compile without <stdio.h>.
           32  */
           33 
           34 #ifdef HAVE_STDDEF_H
           35 #include <stddef.h>
           36 #endif
           37 
           38 #ifdef HAVE_STDLIB_H
           39 #include <stdlib.h>
           40 #endif
           41 
           42 #ifdef NEED_SYS_TYPES_H
           43 #include <sys/types.h>
           44 #endif
           45 
           46 #include <stdio.h>
           47 
           48 /*
           49  * We need memory copying and zeroing functions, plus strncpy().
           50  * ANSI and System V implementations declare these in <string.h>.
           51  * BSD doesn't have the mem() functions, but it does have bcopy()/bzero().
           52  * Some systems may declare memset and memcpy in <memory.h>.
           53  *
           54  * NOTE: we assume the size parameters to these functions are of type size_t.
           55  * Change the casts in these macros if not!
           56  */
           57 
           58 #ifdef NEED_BSD_STRINGS
           59 
           60 #include <strings.h>
           61 #define MEMZERO(target,size)        bzero((void *)(target), (size_t)(size))
           62 #define MEMCOPY(dest,src,size)        bcopy((const void *)(src), (void *)(dest), (size_t)(size))
           63 
           64 #else /* not BSD, assume ANSI/SysV string lib */
           65 
           66 #include <string.h>
           67 #define MEMZERO(target,size)        memset((void *)(target), 0, (size_t)(size))
           68 #define MEMCOPY(dest,src,size)        memcpy((void *)(dest), (const void *)(src), (size_t)(size))
           69 
           70 #endif
           71 
           72 /*
           73  * In ANSI C, and indeed any rational implementation, size_t is also the
           74  * type returned by sizeof().  However, it seems there are some irrational
           75  * implementations out there, in which sizeof() returns an int even though
           76  * size_t is defined as long or unsigned long.  To ensure consistent results
           77  * we always use this SIZEOF() macro in place of using sizeof() directly.
           78  */
           79 
           80 #define SIZEOF(object)        ((size_t) sizeof(object))
           81 
           82 /*
           83  * The modules that use fread() and fwrite() always invoke them through
           84  * these macros.  On some systems you may need to twiddle the argument casts.
           85  * CAUTION: argument order is different from underlying functions!
           86  */
           87 
           88 #define JFREAD(file,buf,sizeofbuf)  \
           89   ((size_t) fread((void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))
           90 #define JFWRITE(file,buf,sizeofbuf)  \
           91   ((size_t) fwrite((const void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file)))