74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
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/*
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* jinclude.h
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*
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* Copyright (C) 1991, 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 is the central file that's #include'd by all the JPEG .c files.
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* Its purpose is to provide a single place to fix any problems with
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* including the wrong system include files.
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* You can edit these declarations if you use a system with nonstandard
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* system include files.
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*/
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/*
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* <stdio.h> is included to get the FILE typedef and NULL macro.
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* Note that the core portable-JPEG files do not actually do any I/O
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* using the stdio library; only the user interface, error handler,
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* and file reading/writing modules invoke any stdio functions.
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* (Well, we did cheat a bit in jvirtmem.c, but only if MEM_STATS is defined.)
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*/
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#include <stdio.h>
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/*
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* We need the size_t typedef, which defines the parameter type of malloc().
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* In an ANSI-conforming implementation this is provided by <stdio.h>,
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* but on non-ANSI systems it's more likely to be in <sys/types.h>.
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*/
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#ifndef __STDC__ /* shouldn't need this if __STDC__ */
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#include <sys/types.h>
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#endif
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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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#define SIZEOF(object) ((size_t) sizeof(object))
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/*
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* We need the memcpy() and strcmp() functions, plus memory zeroing.
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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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* NOTE: we assume the size parameters to these functions are of type size_t.
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* Insert casts in these macros if not!
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*/
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#ifdef __STDC__
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#include <string.h>
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#define MEMZERO(voidptr,size) memset((voidptr), 0, (size))
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#else /* not STDC */
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#ifdef BSD
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#include <strings.h>
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#define MEMZERO(voidptr,size) bzero((voidptr), (size))
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#define memcpy(dest,src,size) bcopy((src), (dest), (size))
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#else /* not BSD, assume Sys V or compatible */
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#include <string.h>
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#define MEMZERO(voidptr,size) memset((voidptr), 0, (size))
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#endif /* BSD */
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#endif /* STDC */
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/* Now include the portable JPEG definition files. */
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#include "jconfig.h"
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#include "jpegdata.h"
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