101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
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/*
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* jconfig.doc
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*
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* Copyright (C) 1991-1994, 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 file documents the configuration options that are required to
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* customize the JPEG software for a particular system.
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*
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*/
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#include "GUI.h" /* Only needed for GUI_USE_PARA(xxx) */
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/*
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* These symbols indicate the properties of your machine or compiler.
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* #define the symbol if yes, #undef it if no.
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*/
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/* Does your compiler support the declaration "unsigned char" ?
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* How about "unsigned short" ?
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*/
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#define HAVE_UNSIGNED_CHAR
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/* Define this if an ordinary "char" type is unsigned.
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* If you're not sure, leaving it undefined will work at some cost in speed.
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* If you defined HAVE_UNSIGNED_CHAR then the speed difference is minimal.
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*/
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#ifdef CHAR_IS_UNSIGNED
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#undef CHAR_IS_UNSIGNED
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#endif
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#define HAVE_STDDEF_H /* Define this if your system has an ANSI-conforming <stddef.h> file. */
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#define HAVE_STDLIB_H /* Define this if your system has an ANSI-conforming <stdlib.h> file. */
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#ifdef NEED_BSD_STRINGS
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#undef NEED_BSD_STRINGS /* Define this if your system does not have an ANSI/SysV <string.h>, but does have a BSD-style <strings.h>. */
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#endif
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/* Define this if your system does not provide typedef size_t in any of the
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* ANSI-standard places (stddef.h, stdlib.h, or stdio.h), but places it in
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* <sys/types.h> instead.
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*/
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#ifdef NEED_SYS_TYPES_H
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#undef NEED_SYS_TYPES_H
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#endif
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/* For 80x86 machines, you need to define NEED_FAR_POINTERS,
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* unless you are using a large-data memory model or 80386 flat-memory mode.
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* On less brain-damaged CPUs this symbol must not be defined.
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* (Defining this symbol causes large data structures to be referenced through
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* "far" pointers and to be allocated with a special version of malloc.)
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*/
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#ifdef NEED_SYS_TYPES_H
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#undef NEED_FAR_POINTERS
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#endif
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/* Although a real ANSI C compiler can deal perfectly well with pointers to
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* unspecified structures (see "incomplete types" in the spec), a few pre-ANSI
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* and pseudo-ANSI compilers get confused. To keep one of these bozos happy,
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* define INCOMPLETE_TYPES_BROKEN. This is not recommended unless you
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* actually get "missing structure definition" warnings or errors while
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* compiling the JPEG code.
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*/
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#ifdef INCOMPLETE_TYPES_BROKEN
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#undef INCOMPLETE_TYPES_BROKEN
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#endif
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/*
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* The following options affect code selection within the JPEG library,
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* but they don't need to be visible to applications using the library.
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* To minimize application namespace pollution, the symbols won't be
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* defined unless JPEG_INTERNALS has been defined.
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*/
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#ifdef JPEG_INTERNALS
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/* Define this if your compiler implements ">>" on signed values as a logical
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* (unsigned) shift; leave it undefined if ">>" is a signed (arithmetic) shift,
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* which is the normal and rational definition.
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*/
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#ifdef RIGHT_SHIFT_IS_UNSIGNED
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#undef RIGHT_SHIFT_IS_UNSIGNED
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#endif
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#endif /* JPEG_INTERNALS */
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#ifndef GUI_USE_PARA
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#define GUI_USE_PARA(x)
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#endif
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