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(THINK_C)
  55 #ifdef __MACH__
  56 #include <sys/types.h>
  57 #else
  58 #include <unix.h>
  59 #include <math.h>
  60 #endif
  61 #endif
  62
  63 #if defined (__SC__) && !defined (__DMC__)
  64     #define __SYMANTEC__
  65 #endif
  66
  67 #include <stdio.h>
  68
  69 #if defined(__PPCC__) || defined(__SYMANTEC__) || defined(__MRC__)
  70 #include <types.h>
  71 #elif !defined(__MWERKS__) && !defined(THINK_C) && !defined(__acornriscos) && !defined(applec)
  72 #include <sys/types.h>
  73 #endif
  74
  75 #if defined(VMS)
  76 #include <file.h>
  77 #include <unixio.h>
  78 #elif !defined(__acornriscos)
  79 #include <fcntl.h>
  80 #endif
  81
  82 /*
  83  * This maze of checks controls defines or not the
  84  * target system has BSD-style typdedefs declared in
  85  * an include file and/or whether or not to include
  86  * <unistd.h> to get the SEEK_* definitions.  Some
  87  * additional includes are also done to pull in the
  88  * appropriate definitions we're looking for.
  89  */
  90 #if defined(__MWERKS__) || defined(THINK_C) || defined(__PPCC__) || defined(__SYMANTEC__) || defined(__MRC__)
  91 #include <stdlib.h>
  92 #ifndef __MACH__
  93 #define BSDTYPES
  94 #endif
  95 #define HAVE_UNISTD_H   0
  96 #elif defined(_WINDOWS) || defined(__WIN32__) || defined(_Windows)
  97 #define BSDTYPES
  98 #elif defined(__DJGPP__)
  99 #define BSDTYPES
 100 #elif defined(OS2_16) || defined(OS2_32)
 101 #define BSDTYPES
 102 #elif defined(__acornriscos)
 103 #include <stdlib.h>
 104 #define BSDTYPES
 105 #define HAVE_UNISTD_H   0
 106 #elif defined(VMS)
 107 #define HAVE_UNISTD_H   0
 108 #else
 109 #define HAVE_UNISTD_H   1
 110 #endif
 111
 112 /*
 113  * The library uses the ANSI C/POSIX SEEK_*
 114  * definitions that should be defined in unistd.h
 115  * (except on system where they are in stdio.h and
 116  * there is no unistd.h).
 117  */
 118 #if !defined(SEEK_SET) && HAVE_UNISTD_H
 119 #include <unistd.h>
 120 #endif
 121
 122 /*
 123  * The library uses memset, memcpy, and memcmp.
 124  * ANSI C and System V define these in string.h.
 125  */
 126 #include <string.h>
 127
 128 /*
 129  * The BSD typedefs are used throughout the library.
 130  * If your system doesn't have them in <sys/types.h>,
 131  * then define BSDTYPES in your Makefile.
 132  */
 133 #if defined(BSDTYPES)
 134 typedef unsigned char u_char;
 135 typedef unsigned short u_short;
 136 typedef unsigned int u_int;
 137 typedef unsigned long u_long;
 138 #endif
 139
 140 /*
 141  * dblparam_t is the type that a double precision
 142  * floating point value will have on the parameter
 143  * stack (when coerced by the compiler).
 144  */
 145 /* Note: on MacPowerPC "extended" is undefined. So only use it for 68K-Macs */
 146 #if defined(__SYMANTEC__) || defined(THINK_C)
 147 typedef extended dblparam_t;
 148 #else
 149 typedef double dblparam_t;
 150 #endif
 151
 152 /*
 153  * If your compiler supports inline functions, then
 154  * set INLINE appropriately to get the known hotspots
 155  * in the library expanded inline.
 156  */
 157 #if defined(__GNUC__)
 158 #if defined(__STRICT_ANSI__)
 159 #define INLINE  __inline__
 160 #else
 161 #define INLINE  inline
 162 #endif
 163 #else /* !__GNUC__ */
 164 #define INLINE
 165 #endif
 166
 167 /*
 168  * GLOBALDATA is a macro that is used to define global variables
 169  * private to the library.  We use this indirection to hide
 170  * brain-damage in VAXC (and GCC) under VAX/VMS.  In these
 171  * environments the macro places the variable in a non-shareable
 172  * program section, which ought to be done by default (sigh!)
 173  *
 174  * Apparently DEC are aware of the problem as this behaviour is the
 175  * default under VMS on AXP.
 176  *
 177  * The GNU C variant is untested.
 178  */
 179 #if defined(VAX) && defined(VMS)
 180 #if defined(VAXC)
 181 #define GLOBALDATA(TYPE,NAME)   extern noshare TYPE NAME
 182 #endif
 183 #if defined(__GNUC__)
 184 #define GLOBALDATA(TYPE,NAME)   extern TYPE NAME \
 185         asm("_$$PsectAttributes_NOSHR$$" #NAME)
 186 #endif
 187 #else   /* !VAX/VMS */
 188 #define GLOBALDATA(TYPE,NAME)   extern TYPE NAME
 189 #endif
 190
 191 #if defined(__acornriscos)
 192 /*
 193  * osfcn.h is part of C++Lib on Acorn C/C++, and as such can't be used
 194  * on C alone. For that reason, the relevant functions are
 195  * implemented in tif_acorn.c, and the elements from the header
 196  * file are included here.
 197  */
 198 #if defined(__cplusplus)
 199 #include <osfcn.h>
 200 #else
 201 #define O_RDONLY        0
 202 #define O_WRONLY        1
 203 #define O_RDWR          2
 204 #define O_APPEND        8
 205 #define O_CREAT         0x200
 206 #define O_TRUNC         0x400
 207 typedef long off_t;
 208 extern int open(const char *name, int flags, int mode);
 209 extern int close(int fd);
 210 extern int write(int fd, const char *buf, int nbytes);
 211 extern int read(int fd, char *buf, int nbytes);
 212 extern off_t lseek(int fd, off_t offset, int whence);
 213 extern int creat(const char *path, int mode);
 214 #endif /* __cplusplus */
 215 #endif /* __acornriscos */
 216
 217 /* Bit and byte order, the default is MSB to LSB */
 218 #ifdef VMS
 219 #undef HOST_FILLORDER
 220 #undef HOST_BIGENDIAN
 221 #define HOST_FILLORDER FILLORDER_LSB2MSB
 222 #define HOST_BIGENDIAN  0
 223 #endif
 224
 225
 226 #endif /* _COMPAT_ */