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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__ #ifndef NONANSI_INCLUDES #define INCLUDES_ARE_ANSI /* this is what's tested before including */ #endif #endif /* * <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> #endif #ifdef __SASC /* Amiga SAS C provides it in stddef.h. */ #include <stddef.h> #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. */ #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! */ #ifdef INCLUDES_ARE_ANSI #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"
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