compiler/libjpeg/jconfig.h

   1 /*
   2  * jconfig.txt
   3  *
   4  * Copyright (C) 1991-1994, Thomas G. Lane.
   5  * This file is part of the Independent JPEG Group's software.
   6  * For conditions of distribution and use, see the accompanying README file.
   7  *
   8  * This file documents the configuration options that are required to
   9  * customize the JPEG software for a particular system.
  10  *
  11  * The actual configuration options for a particular installation are stored
  12  * in jconfig.h.  On many machines, jconfig.h can be generated automatically
  13  * or copied from one of the "canned" jconfig files that we supply.  But if
  14  * you need to generate a jconfig.h file by hand, this file tells you how.
  15  *
  16  * DO NOT EDIT THIS FILE --- IT WON'T ACCOMPLISH ANYTHING.
  17  * EDIT A COPY NAMED JCONFIG.H.
  18  */
  19
  20
  21 /*
  22  * These symbols indicate the properties of your machine or compiler.
  23  * #define the symbol if yes, #undef it if no.
  24  */
  25
  26 /* Does your compiler support function prototypes?
  27  * (If not, you also need to use ansi2knr, see install.txt)
  28  */
  29 #define HAVE_PROTOTYPES
  30
  31 /* Does your compiler support the declaration "unsigned char" ?
  32  * How about "unsigned short" ?
  33  */
  34 #define HAVE_UNSIGNED_CHAR
  35 #define HAVE_UNSIGNED_SHORT
  36
  37 /* Define "void" as "char" if your compiler doesn't know about type void.
  38  * NOTE: be sure to define void such that "void *" represents the most general
  39  * pointer type, e.g., that returned by malloc().
  40  */
  41 /* #define void char */
  42
  43 /* Define "const" as empty if your compiler doesn't know the "const" keyword.
  44  */
  45 /* #define const */
  46
  47 /* Define this if an ordinary "char" type is unsigned.
  48  * If you're not sure, leaving it undefined will work at some cost in speed.
  49  * If you defined HAVE_UNSIGNED_CHAR then the speed difference is minimal.
  50  */
  51 #undef CHAR_IS_UNSIGNED
  52
  53 /* Define this if your system has an ANSI-conforming <stddef.h> file.
  54  */
  55 #define HAVE_STDDEF_H
  56
  57 /* Define this if your system has an ANSI-conforming <stdlib.h> file.
  58  */
  59 #define HAVE_STDLIB_H
  60
  61 /* Define this if your system does not have an ANSI/SysV <string.h>,
  62  * but does have a BSD-style <strings.h>.
  63  */
  64 #undef NEED_BSD_STRINGS
  65
  66 /* Define this if your system does not provide typedef size_t in any of the
  67  * ANSI-standard places (stddef.h, stdlib.h, or stdio.h), but places it in
  68  * <sys/types.h> instead.
  69  */
  70 #undef NEED_SYS_TYPES_H
  71
  72 /* For 80x86 machines, you need to define NEED_FAR_POINTERS,
  73  * unless you are using a large-data memory model or 80386 flat-memory mode.
  74  * On less brain-damaged CPUs this symbol must not be defined.
  75  * (Defining this symbol causes large data structures to be referenced through
  76  * "far" pointers and to be allocated with a special version of malloc.)
  77  */
  78 #undef NEED_FAR_POINTERS
  79
  80 /* Define this if your linker needs global names to be unique in less
  81  * than the first 15 characters.
  82  */
  83 #undef NEED_SHORT_EXTERNAL_NAMES
  84
  85 /* Although a real ANSI C compiler can deal perfectly well with pointers to
  86  * unspecified structures (see "incomplete types" in the spec), a few pre-ANSI
  87  * and pseudo-ANSI compilers get confused.  To keep one of these bozos happy,
  88  * define INCOMPLETE_TYPES_BROKEN.  This is not recommended unless you
  89  * actually get "missing structure definition" warnings or errors while
  90  * compiling the JPEG code.
  91  */
  92 #undef INCOMPLETE_TYPES_BROKEN
  93
  94
  95 /*
  96  * The following options affect code selection within the JPEG library,
  97  * but they don't need to be visible to applications using the library.
  98  * To minimize application namespace pollution, the symbols won't be
  99  * defined unless JPEG_INTERNALS has been defined.
 100  */
 101
 102 #ifdef JPEG_INTERNALS
 103
 104 /* Define this if your compiler implements ">>" on signed values as a logical
 105  * (unsigned) shift; leave it undefined if ">>" is a signed (arithmetic) shift,
 106  * which is the normal and rational definition.
 107  */
 108 #undef RIGHT_SHIFT_IS_UNSIGNED
 109
 110
 111 #endif /* JPEG_INTERNALS */
 112
 113
 114 /*
 115  * The remaining options do not affect the JPEG library proper,
 116  * but only the sample applications cjpeg/djpeg (see cjpeg.c, djpeg.c).
 117  * Other applications can ignore these.
 118  */
 119
 120 #ifdef JPEG_CJPEG_DJPEG
 121
 122 /* These defines indicate which image (non-JPEG) file formats are allowed. */
 123
 124 #define BMP_SUPPORTED           /* BMP image file format */
 125 #define GIF_SUPPORTED           /* GIF image file format */
 126 #define PPM_SUPPORTED           /* PBMPLUS PPM/PGM image file format */
 127 #undef RLE_SUPPORTED            /* Utah RLE image file format */
 128 #define TARGA_SUPPORTED         /* Targa image file format */
 129
 130 /* Define this if you want to name both input and output files on the command
 131  * line, rather than using stdout and optionally stdin.  You MUST do this if
 132  * your system can't cope with binary I/O to stdin/stdout.  See comments at
 133  * head of cjpeg.c or djpeg.c.
 134  */
 135 #undef TWO_FILE_COMMANDLINE
 136
 137 /* Define this if your system needs explicit cleanup of temporary files.
 138  * This is crucial under MS-DOS, where the temporary "files" may be areas
 139  * of extended memory; on most other systems it's not as important.
 140  */
 141 #undef NEED_SIGNAL_CATCHER
 142
 143 /* By default, we open image files with fopen(...,"rb") or fopen(...,"wb").
 144  * This is necessary on systems that distinguish text files from binary files,
 145  * and is harmless on most systems that don't.  If you have one of the rare
 146  * systems that complains about the "b" spec, define this symbol.
 147  */
 148 #undef DONT_USE_B_MODE
 149
 150 /* Define this if you want percent-done progress reports from cjpeg/djpeg.
 151  */
 152 #undef PROGRESS_REPORT
 153
 154
 155 #endif /* JPEG_CJPEG_DJPEG */