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 #if defined(_MSC_VER) && !defined (_CRT_SECURE_NO_DEPRECATE) 24 # define _CRT_SECURE_NO_DEPRECATE 25 #endif 26 27 /* 28 * We need the NULL macro and size_t typedef. 29 * On an ANSI-conforming system it is sufficient to include <stddef.h>. 30 * Otherwise, we get them from <stdlib.h> or <stdio.h>; we may have to 31 * pull in <sys/types.h> as well. 32 * Note that the core JPEG library does not require <stdio.h>; 33 * only the default error handler and data source/destination modules do. 34 * But we must pull it in because of the references to FILE in jpeglib.h. 35 * You can remove those references if you want to compile without <stdio.h>. 36 */ 37 38 #ifdef HAVE_STDDEF_H 39 #include <stddef.h> 40 #endif 41 42 #ifdef HAVE_STDLIB_H 43 #include <stdlib.h> 44 #endif 45 46 #ifdef NEED_SYS_TYPES_H 47 #include <sys/types.h> 48 #endif 49 50 #include <stdio.h> 51 52 /* 53 * We need memory copying and zeroing functions, plus strncpy(). 54 * ANSI and System V implementations declare these in <string.h>. 55 * BSD doesn't have the mem() functions, but it does have bcopy()/bzero(). 56 * Some systems may declare memset and memcpy in <memory.h>. 57 * 58 * NOTE: we assume the size parameters to these functions are of type size_t. 59 * Change the casts in these macros if not! 60 */ 61 62 #ifdef NEED_BSD_STRINGS 63 64 #include <strings.h> 65 #define MEMZERO(target,size) bzero((void *)(target), (size_t)(size)) 66 #define MEMCOPY(dest,src,size) bcopy((const void *)(src), (void *)(dest), (size_t)(size)) 67 68 #else /* not BSD, assume ANSI/SysV string lib */ 69 70 #include <string.h> 71 #define MEMZERO(target,size) memset((void *)(target), 0, (size_t)(size)) 72 #define MEMCOPY(dest,src,size) memcpy((void *)(dest), (const void *)(src), (size_t)(size)) 73 74 #endif 75 76 /* 77 * In ANSI C, and indeed any rational implementation, size_t is also the 78 * type returned by sizeof(). However, it seems there are some irrational 79 * implementations out there, in which sizeof() returns an int even though 80 * size_t is defined as long or unsigned long. To ensure consistent results 81 * we always use this SIZEOF() macro in place of using sizeof() directly. 82 */ 83 84 #define SIZEOF(object) ((size_t) sizeof(object)) 85 86 /* 87 * The modules that use fread() and fwrite() always invoke them through 88 * these macros. On some systems you may need to twiddle the argument casts. 89 * CAUTION: argument order is different from underlying functions! 90 */ 91 92 #define JFREAD(file,buf,sizeofbuf) \ 93 ((size_t) fread((void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file))) 94 #define JFWRITE(file,buf,sizeofbuf) \ 95 ((size_t) fwrite((const void *) (buf), (size_t) 1, (size_t) (sizeofbuf), (file))) 96