jconfig.h

00001 /*
00002  * jconfig.doc
00003  *
00004  * Copyright (C) 1991-1994, Thomas G. Lane.
00005  * This file is part of the Independent JPEG Group's software.
00006  * For conditions of distribution and use, see the accompanying README file.
00007  *
00008  * This file documents the configuration options that are required to
00009  * customize the JPEG software for a particular system.
00010  *
00011  * The actual configuration options for a particular installation are stored
00012  * in jconfig.h.  On many machines, jconfig.h can be generated automatically
00013  * or copied from one of the "canned" jconfig files that we supply.  But if
00014  * you need to generate a jconfig.h file by hand, this file tells you how.
00015  *
00016  * DO NOT EDIT THIS FILE --- IT WON'T ACCOMPLISH ANYTHING.
00017  * EDIT A COPY NAMED JCONFIG.H.
00018  */
00019 
00020 
00021 /*
00022  * These symbols indicate the properties of your machine or compiler.
00023  * #define the symbol if yes, #undef it if no.
00024  */
00025 
00026 /* Does your compiler support function prototypes?
00027  * (If not, you also need to use ansi2knr, see install.doc)
00028  */
00029 #define HAVE_PROTOTYPES
00030 
00031 /* Does your compiler support the declaration "unsigned char" ?
00032  * How about "unsigned short" ?
00033  */
00034 #define HAVE_UNSIGNED_CHAR
00035 #define HAVE_UNSIGNED_SHORT
00036 
00037 /* Define "void" as "char" if your compiler doesn't know about type void.
00038  * NOTE: be sure to define void such that "void *" represents the most general
00039  * pointer type, e.g., that returned by malloc().
00040  */
00041 /* #define void char */
00042 
00043 /* Define "const" as empty if your compiler doesn't know the "const" keyword.
00044  */
00045 /* #define const */
00046 
00047 /* Define this if an ordinary "char" type is unsigned.
00048  * If you're not sure, leaving it undefined will work at some cost in speed.
00049  * If you defined HAVE_UNSIGNED_CHAR then the speed difference is minimal.
00050  */
00051 #undef CHAR_IS_UNSIGNED
00052 
00053 /* Define this if your system has an ANSI-conforming <stddef.h> file.
00054  */
00055 #define HAVE_STDDEF_H
00056 
00057 /* Define this if your system has an ANSI-conforming <stdlib.h> file.
00058  */
00059 #define HAVE_STDLIB_H
00060 
00061 /* Define this if your system has an FILE* type of <stdio.h>.
00062  */
00063 /*#define HAVE_FILE_P_H*/
00064 
00065 /* Define this if your system does not have an ANSI/SysV <string.h>,
00066  * but does have a BSD-style <strings.h>.
00067  */
00068 #undef NEED_BSD_STRINGS
00069 
00070 /* Define this if your system does not provide typedef size_t in any of the
00071  * ANSI-standard places (stddef.h, stdlib.h, or stdio.h), but places it in
00072  * <sys/types.h> instead.
00073  */
00074 #undef NEED_SYS_TYPES_H
00075 
00076 /* For 80x86 machines, you need to define NEED_FAR_POINTERS,
00077  * unless you are using a large-data memory model or 80386 flat-memory mode.
00078  * On less brain-damaged CPUs this symbol must not be defined.
00079  * (Defining this symbol causes large data structures to be referenced through
00080  * "far" pointers and to be allocated with a special version of malloc.)
00081  */
00082 #undef NEED_FAR_POINTERS
00083 
00084 /* Define this if your linker needs global names to be unique in less
00085  * than the first 15 characters.
00086  */
00087 #undef NEED_SHORT_EXTERNAL_NAMES
00088 
00089 /* Although a real ANSI C compiler can deal perfectly well with pointers to
00090  * unspecified structures (see "incomplete types" in the spec), a few pre-ANSI
00091  * and pseudo-ANSI compilers get confused.  To keep one of these bozos happy,
00092  * define INCOMPLETE_TYPES_BROKEN.  This is not recommended unless you
00093  * actually get "missing structure definition" warnings or errors while
00094  * compiling the JPEG code.
00095  */
00096 #undef INCOMPLETE_TYPES_BROKEN
00097 
00098 
00099 /*
00100  * The following options affect code selection within the JPEG library,
00101  * but they don't need to be visible to applications using the library.
00102  * To minimize application namespace pollution, the symbols won't be
00103  * defined unless JPEG_INTERNALS has been defined.
00104  */
00105 
00106 #ifdef JPEG_INTERNALS
00107 
00108 /* Define this if your compiler implements ">>" on signed values as a logical
00109  * (unsigned) shift; leave it undefined if ">>" is a signed (arithmetic) shift,
00110  * which is the normal and rational definition.
00111  */
00112 #undef RIGHT_SHIFT_IS_UNSIGNED
00113 
00114 
00115 #endif /* JPEG_INTERNALS */
00116 
00117 
00118 /*
00119  * The remaining options do not affect the JPEG library proper,
00120  * but only the sample applications cjpeg/djpeg (see cjpeg.c, djpeg.c).
00121  * Other applications can ignore these.
00122  */
00123 
00124 #ifdef JPEG_CJPEG_DJPEG
00125 
00126 /* These defines indicate which image (non-JPEG) file formats are allowed. */
00127 
00128 #undef BMP_SUPPORTED        /* BMP image file format */
00129 #undef GIF_SUPPORTED        /* GIF image file format */
00130 #undef PPM_SUPPORTED        /* PBMPLUS PPM/PGM image file format */
00131 #undef RLE_SUPPORTED        /* Utah RLE image file format */
00132 #undef TARGA_SUPPORTED      /* Targa image file format */
00133 
00134 /* Define this if you want to name both input and output files on the command
00135  * line, rather than using stdout and optionally stdin.  You MUST do this if
00136  * your system can't cope with binary I/O to stdin/stdout.  See comments at
00137  * head of cjpeg.c or djpeg.c.
00138  */
00139 #undef TWO_FILE_COMMANDLINE
00140 
00141 /* Define this if your system needs explicit cleanup of temporary files.
00142  * This is crucial under MS-DOS, where the temporary "files" may be areas
00143  * of extended memory; on most other systems it's not as important.
00144  */
00145 #undef NEED_SIGNAL_CATCHER
00146 
00147 /* By default, we open image files with fopen(...,"rb") or fopen(...,"wb").
00148  * This is necessary on systems that distinguish text files from binary files,
00149  * and is harmless on most systems that don't.  If you have one of the rare
00150  * systems that complains about the "b" spec, define this symbol.
00151  */
00152 #undef DONT_USE_B_MODE
00153 
00154 /* Define this if you want percent-done progress reports from cjpeg/djpeg.
00155  */
00156 #undef PROGRESS_REPORT
00157 
00158 #endif /* JPEG_CJPEG_DJPEG */
00159 
00160 #define JDCT_DEFAULT  JDCT_IFAST
00161 #define JDCT_FASTEST  JDCT_IFAST
00162 #define NO_ZERO_ROW_TEST
00163 #include  "r_multi_compiler_typedef.h"  /* INLINE */
00164