src/tiff/contrib/acorn/convert

   1 RISC OS Conversion log
   2 ======================
   3
   4 mkversion.c
   5 ~~~~~~~~~~~
   6 The RISC OS command-line does not allow the direct creation of the version.h
   7 file in the proper manner. To remedy this in such a way that the version
   8 header is made at compiletime, I wrote this small program. It is fully
   9 portable, so should work quite happily for any other platform that might need
  10 it.
  11
  12 msg3states.c
  13 ~~~~~~~~~~~~
  14 Needed getopt.c from the port folder, then compiled and worked fine.
  15
  16
  17 tiff.h
  18 ~~~~~~
  19
  20 ====1====
  21
  22 The symbol _MIPS_SZLONG, if not defined, causes a compiler error. Fixed by
  23 ensuring it does exist. This looks to me like this wouldn't be an
  24 Acorn-specific problem. The new code fragment is as follows:
  25
  26 #ifndef _MIPS_SZLONG
  27 #define _MIPS_SZLONG 32
  28 #endif
  29 #if defined(__alpha) || _MIPS_SZLONG == 64
  30
  31
  32
  33 tiffcomp.h
  34 ~~~~~~~~~~
  35
  36 ====1====
  37
  38 #if !defined(__MWERKS__) && !defined(THINK_C)
  39 #include <sys/types.h>
  40 #endif
  41
  42 Acorn also doesn't have this header so:
  43
  44 #if !defined(__MWERKS__) && !defined(THINK_C) && !defined(__acorn)
  45 #include <sys/types.h>
  46 #endif
  47
  48 ====2====
  49
  50 #ifdef VMS
  51 #include <file.h>
  52 #include <unixio.h>
  53 #else
  54 #include <fcntl.h>
  55 #endif
  56
  57 This seems to indicate that fcntl.h is included on all systems except
  58 VMS. Odd, because I've never heard of it before. Sure it's in the ANSI
  59 definition? Anyway, following change:
  60
  61 #ifdef VMS
  62 #include <file.h>
  63 #include <unixio.h>
  64 #else
  65 #ifndef __acorn
  66 #include <fcntl.h>
  67 #endif
  68 #endif
  69
  70 This will probably change when I find out what it wants from fcntl.h!
  71
  72 ====3====
  73
  74 #if defined(__MWERKS__) || defined(THINK_C) || defined(applec)
  75 #include <stdlib.h>
  76 #define BSDTYPES
  77 #endif
  78
  79 Added RISC OS to above thus:
  80
  81 #if defined(__MWERKS__) || defined(THINK_C) || defined(applec) || defined(__acorn)
  82 #include <stdlib.h>
  83 #define BSDTYPES
  84 #endif
  85
  86 ====4====
  87
  88 /*
  89  * The library uses the ANSI C/POSIX SEEK_*
  90  * definitions that should be defined in unistd.h
  91  * (except on VMS where they are in stdio.h and
  92  * there is no unistd.h).
  93  */
  94 #ifndef SEEK_SET
  95 #if !defined(VMS) && !defined (applec) && !defined(THINK_C) && !defined(__MWERKS__)
  96 #include <unistd.h>
  97 #endif
  98
  99 RISC OS is like VMS and Mac in this regard. So changed to:
 100
 101 /*
 102  * The library uses the ANSI C/POSIX SEEK_*
 103  * definitions that should be defined in unistd.h
 104  * (except on VMS or the Mac or RISC OS, where they are in stdio.h and
 105  * there is no unistd.h).
 106  */
 107 #ifndef SEEK_SET
 108 #if !defined(VMS) && !defined (applec) && !defined(THINK_C) && !defined(__MWERKS__) && !defined(__acorn)
 109 #include <unistd.h>
 110 #endif
 111 #endif
 112
 113 ====5====
 114
 115 NB: HAVE_IEEEFP is defined in tiffconf.h, not tiffcomp.h as mentioned
 116 in libtiff.README. (Note written on original port from 3.4beta004)
 117
 118 Acorn C/C++ claims to accord with IEEE 754, so no change (yet) to
 119 tiffconf.h.
 120
 121 ====6====
 122
 123 Unsure about whether this compiler supports inline functions. Will
 124 leave it on for the time being and see if it works! (Likely if
 125 everything else does.)
 126
 127 ... Seems to be OK ...
 128
 129 ====7====
 130
 131 Added to the end:
 132
 133 /*
 134  * osfcn.h is part of C++Lib on Acorn C/C++, and as such can't be used
 135  * on C alone. For that reason, the relevant functions have been
 136  * implemented by myself in tif_acorn.c, and the elements from the header
 137  * included here.
 138  */
 139
 140 #ifdef __acorn
 141 #ifdef __cplusplus
 142 #include <osfcn.h>
 143 #else
 144 #include "kernel.h"
 145 #define O_RDONLY        0
 146 #define O_WRONLY        1
 147 #define O_RDWR          2
 148 #define O_APPEND        8
 149 #define O_CREAT         0x200
 150 #define O_TRUNC         0x400
 151 typedef long off_t;
 152 extern int open(const char *name, int flags, int mode);
 153 extern int close(int fd);
 154 extern int write(int fd, const char *buf, int nbytes);
 155 extern int read(int fd, char *buf, int nbytes);
 156 extern off_t lseek(int fd, off_t offset, int whence);
 157 #endif
 158 #endif
 159
 160
 161 ===============================================================================
 162
 163 tif_acorn.c
 164 ~~~~~~~~~~~
 165
 166 Created file tif_acorn.c, copied initially from tif_unix.c
 167
 168 Documented internally where necessary.
 169
 170 Note that I have implemented the low-level file-handling functions normally
 171 found in osfcn.h in here, and put the header info at the bottom of
 172 tiffcomp.h. This is further documented from a RISC OS perspective inside the
 173 file.
 174
 175 ===============================================================================