src/tiff/tiffcomp.h

   1 /* $Header$ */
   2
   3 /*
   4  * Copyright (c) 1990-1997 Sam Leffler
   5  * Copyright (c) 1991-1997 Silicon Graphics, Inc.
   6  *
   7  * Permission to use, copy, modify, distribute, and sell this software and
   8  * its documentation for any purpose is hereby granted without fee, provided
   9  * that (i) the above copyright notices and this permission notice appear in
  10  * all copies of the software and related documentation, and (ii) the names of
  11  * Sam Leffler and Silicon Graphics may not be used in any advertising or
  12  * publicity relating to the software without the specific, prior written
  13  * permission of Sam Leffler and Silicon Graphics.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
  16  * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
  17  * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
  18  *
  19  * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
  20  * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
  21  * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
  22  * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
  23  * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  24  * OF THIS SOFTWARE.
  25  */
  26
  27 #ifndef _COMPAT_
  28 #define _COMPAT_
  29 /*
  30  * This file contains a hodgepodge of definitions and
  31  * declarations that are needed to provide compatibility
  32  * between the native system and the base implementation
  33  * that the library assumes.
  34  *
  35  * NB: This file is a mess.
  36  */
  37
  38 /*
  39  * Setup basic type definitions and function declaratations.
  40  */
  41
  42 /*
  43  * Simplify Acorn RISC OS identifier (to avoid confusion with Acorn RISC iX
  44  * and with defunct Unix Risc OS)
  45  * No need to specify __arm - hey, Acorn might port the OS, no problem here!
  46  */
  47 #ifdef __acornriscos
  48 #undef __acornriscos
  49 #endif
  50 #if defined(__acorn) && defined(__riscos)
  51 #define __acornriscos
  52 #endif
  53
  54 #if (defined(__MWERKS__) && !defined(__MACH__)) || defined(THINK_C)
  55 #include <unix.h>
  56 #include <math.h>
  57 #endif
  58
  59 #include <stdio.h>
  60
  61 #if defined(__PPCC__) || ( defined(__SC__) && !defined(__DMC__) ) || defined(__MRC__)
  62 #include <types.h>
  63 #elif !defined(__MWERKS__) && !defined(THINK_C) && !defined(__acornriscos) && !defined(applec)
  64 #include <sys/types.h>
  65 #endif
  66
  67 #if defined(VMS)
  68 #include <file.h>
  69 #include <unixio.h>
  70 #elif !defined(__acornriscos)
  71 #include <fcntl.h>
  72 #endif
  73
  74 /*
  75  * This maze of checks controls defines or not the
  76  * target system has BSD-style typdedefs declared in
  77  * an include file and/or whether or not to include
  78  * <unistd.h> to get the SEEK_* definitions.  Some
  79  * additional includes are also done to pull in the
  80  * appropriate definitions we're looking for.
  81  */
  82 #if defined(__MWERKS__) || defined(THINK_C) || defined(__PPCC__) || ( defined(__SC__) && !defined(__DMC__) ) || defined(__MRC__)
  83 #include <stdlib.h>
  84 #define BSDTYPES
  85 #define HAVE_UNISTD_H   0
  86 #elif (defined(_WINDOWS) || defined(__WIN32__) || defined(_Windows) || defined(_WIN32)) && !defined(unix)
  87 #define BSDTYPES
  88 #elif defined(OS2_16) || defined(OS2_32)
  89 #define BSDTYPES
  90 #elif defined(__acornriscos)
  91 #include <stdlib.h>
  92 #define BSDTYPES
  93 #define HAVE_UNISTD_H   0
  94 #elif defined(VMS)
  95 #define HAVE_UNISTD_H   0
  96 #else
  97 #define HAVE_UNISTD_H   1
  98 #endif
  99
 100 /*
 101  * The library uses the ANSI C/POSIX SEEK_*
 102  * definitions that should be defined in unistd.h
 103  * (except on system where they are in stdio.h and
 104  * there is no unistd.h).
 105  */
 106 #if !defined(SEEK_SET) && HAVE_UNISTD_H
 107 #include <unistd.h>
 108 #endif
 109
 110 /*
 111  * The library uses memset, memcpy, and memcmp.
 112  * ANSI C and System V define these in string.h.
 113  */
 114 #include <string.h>
 115
 116 /*
 117  * The BSD typedefs are used throughout the library.
 118  * If your system doesn't have them in <sys/types.h>,
 119  * then define BSDTYPES in your Makefile.
 120  */
 121 #if defined(BSDTYPES)
 122 # ifndef _BSDTYPES_DEFINED
 123 #  ifndef __u_char_defined
 124 typedef unsigned char u_char;
 125 typedef unsigned short u_short;
 126 typedef unsigned int u_int;
 127 typedef unsigned long u_long;
 128 #   define __u_char_defined
 129 #  endif /* __u_char_defined */
 130 #  define _BSDTYPES_DEFINED
 131 # endif /* _BSDTYPES_DEFINED */
 132 #endif /* BSDTYPES */
 133
 134 /*
 135  * dblparam_t is the type that a double precision
 136  * floating point value will have on the parameter
 137  * stack (when coerced by the compiler).
 138  */
 139 /* Note: on MacPowerPC "extended" is undefined. So only use it for 68K-Macs */
 140 #if ( defined(__SC__) && !defined(__DMC__) ) || defined(THINK_C)
 141 typedef extended dblparam_t;
 142 #else
 143 typedef double dblparam_t;
 144 #endif
 145
 146 /*
 147  * If your compiler supports inline functions, then
 148  * set INLINE appropriately to get the known hotspots
 149  * in the library expanded inline.
 150  */
 151 #if defined(__GNUC__)
 152 #if defined(__STRICT_ANSI__)
 153 #define INLINE  __inline__
 154 #else
 155 #define INLINE  inline
 156 #endif
 157 #else /* !__GNUC__ */
 158 #define INLINE
 159 #endif
 160
 161 /*
 162  * GLOBALDATA is a macro that is used to define global variables
 163  * private to the library.  We use this indirection to hide
 164  * brain-damage in VAXC (and GCC) under VAX/VMS.  In these
 165  * environments the macro places the variable in a non-shareable
 166  * program section, which ought to be done by default (sigh!)
 167  *
 168  * Apparently DEC are aware of the problem as this behaviour is the
 169  * default under VMS on AXP.
 170  *
 171  * The GNU C variant is untested.
 172  */
 173 #if defined(VAX) && defined(VMS)
 174 #if defined(VAXC)
 175 #define GLOBALDATA(TYPE,NAME)   extern noshare TYPE NAME
 176 #endif
 177 #if defined(__GNUC__)
 178 #define GLOBALDATA(TYPE,NAME)   extern TYPE NAME \
 179         asm("_$$PsectAttributes_NOSHR$$" #NAME)
 180 #endif
 181 #else   /* !VAX/VMS */
 182 #define GLOBALDATA(TYPE,NAME)   extern TYPE NAME
 183 #endif
 184
 185 #if defined(__acornriscos)
 186 /*
 187  * osfcn.h is part of C++Lib on Acorn C/C++, and as such can't be used
 188  * on C alone. For that reason, the relevant functions are
 189  * implemented in tif_acorn.c, and the elements from the header
 190  * file are included here.
 191  */
 192 #if defined(__cplusplus)
 193 #include <osfcn.h>
 194 #else
 195 #define O_RDONLY        0
 196 #define O_WRONLY        1
 197 #define O_RDWR          2
 198 #define O_APPEND        8
 199 #define O_CREAT         0x200
 200 #define O_TRUNC         0x400
 201 typedef long off_t;
 202 extern int open(const char *name, int flags, int mode);
 203 extern int close(int fd);
 204 extern int write(int fd, const char *buf, int nbytes);
 205 extern int read(int fd, char *buf, int nbytes);
 206 extern off_t lseek(int fd, off_t offset, int whence);
 207 extern int creat(const char *path, int mode);
 208 #endif /* __cplusplus */
 209 #endif /* __acornriscos */
 210
 211 /* Bit and byte order, the default is MSB to LSB */
 212 #ifdef VMS
 213 #undef HOST_FILLORDER
 214 #undef HOST_BIGENDIAN
 215 #define HOST_FILLORDER FILLORDER_LSB2MSB
 216 #define HOST_BIGENDIAN  0
 217 #endif
 218
 219
 220 #endif /* _COMPAT_ */