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Diffstat (limited to 'jinclude.h')
-rw-r--r-- | jinclude.h | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/jinclude.h b/jinclude.h new file mode 100644 index 0000000..ec7a7e8 --- /dev/null +++ b/jinclude.h @@ -0,0 +1,73 @@ +/* + * jinclude.h + * + * Copyright (C) 1991, 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. + */ + + +/* + * <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 jvirtmem.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>. + */ + +#ifndef __STDC__ /* shouldn't need this if __STDC__ */ +#include <sys/types.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. + */ + +#define SIZEOF(object) ((size_t) sizeof(object)) + +/* + * 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(). + * NOTE: we assume the size parameters to these functions are of type size_t. + * Insert casts in these macros if not! + */ + +#ifdef __STDC__ +#include <string.h> +#define MEMZERO(voidptr,size) memset((voidptr), 0, (size)) +#else /* not STDC */ +#ifdef BSD +#include <strings.h> +#define MEMZERO(voidptr,size) bzero((voidptr), (size)) +#define memcpy(dest,src,size) bcopy((src), (dest), (size)) +#else /* not BSD, assume Sys V or compatible */ +#include <string.h> +#define MEMZERO(voidptr,size) memset((voidptr), 0, (size)) +#endif /* BSD */ +#endif /* STDC */ + + +/* Now include the portable JPEG definition files. */ + +#include "jconfig.h" + +#include "jpegdata.h" |