contrib/groff-1.19/src/include/nonposix.h

   1 /* Copyright (C) 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
   2      Written by Eli Zaretskii (eliz@is.elta.co.il)
   3
   4 This file is part of groff.
   5
   6 groff is free software; you can redistribute it and/or modify it under
   7 the terms of the GNU General Public License as published by the Free
   8 Software Foundation; either version 2, or (at your option) any later
   9 version.
  10
  11 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  12 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 for more details.
  15
  16 You should have received a copy of the GNU General Public License along
  17 with groff; see the file COPYING.  If not, write to the Free Software
  18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
  19
  20 /* This header file compartmentalize all idiosyncrasies of non-Posix
  21    systems, such as MS-DOS, MS-Windows, etc.  It should be loaded after
  22    the system headers like stdio.h to protect against warnings and error
  23    messages w.r.t. redefining macros. */
  24
  25 #if defined _MSC_VER
  26 # ifndef _WIN32
  27 #  define _WIN32
  28 # endif
  29 #endif
  30
  31 #if defined(__MSDOS__) || defined(__EMX__) \
  32     || (defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__))
  33
  34 /* Binary I/O nuisances. */
  35 # include <fcntl.h>
  36 # include <io.h>
  37 # ifdef HAVE_UNISTD_H
  38 #  include <unistd.h>
  39 # endif
  40 # ifndef STDIN_FILENO
  41 #  define STDIN_FILENO  0
  42 #  define STDOUT_FILENO 1
  43 #  define STDERR_FILENO 2
  44 # endif
  45 # ifdef HAVE_DIRECT_H
  46 #  include <direct.h>
  47 # endif
  48 # ifdef HAVE_PROCESS_H
  49 #  include <process.h>
  50 # endif
  51 # if defined(_MSC_VER) || defined(__MINGW32__)
  52 #  define POPEN_RT      "rt"
  53 #  define POPEN_WT      "wt"
  54 #  define popen(c,m)    _popen(c,m)
  55 #  define pclose(p)     _pclose(p)
  56 #  define pipe(pfd)     _pipe((pfd),0,_O_BINARY|_O_NOINHERIT)
  57 #  define mkdir(p,m)    _mkdir(p)
  58 #  define setmode(f,m)  _setmode(f,m)
  59 #  define WAIT(s,p,m)   _cwait(s,p,m)
  60 #  define creat(p,m)    _creat(p,m)
  61 #  define read(f,b,s)   _read(f,b,s)
  62 #  define write(f,b,s)  _write(f,b,s)
  63 #  define dup(f)        _dup(f)
  64 #  define dup2(f1,f2)   _dup2(f1,f2)
  65 #  define close(f)      _close(f)
  66 #  define isatty(f)     _isatty(f)
  67 # endif
  68 # define SET_BINARY(f)  do {if (!isatty(f)) setmode(f,O_BINARY);} while(0)
  69 # define FOPEN_RB       "rb"
  70 # define FOPEN_WB       "wb"
  71 # define FOPEN_RWB      "wb+"
  72 # ifndef O_BINARY
  73 #  ifdef _O_BINARY
  74 #   define O_BINARY     (_O_BINARY)
  75 #  endif
  76 # endif
  77
  78 /* The system shell.  Groff assumes a Unixy shell, but non-Posix
  79    systems don't have standard places where it lives, and might not
  80    have it installed to begin with.  We want to give them some leeway.  */
  81 # ifdef __EMX__
  82 #  define getcwd(b,s)   _getcwd2(b,s)
  83 # else
  84 #  define BSHELL        (system_shell_name())
  85 #  define BSHELL_DASH_C (system_shell_dash_c())
  86 #  define IS_BSHELL(s)  (is_system_shell(s))
  87 # endif
  88
  89 /* The separator for directories in PATH and other environment
  90    variables.  */
  91 # define PATH_SEP       ";"
  92 # define PATH_SEP_CHAR  ';'
  93
  94 /* Characters that separate directories in a path name.  */
  95 # define DIR_SEPS       "/\\:"
  96
  97 /* How to tell if the argument is an absolute file name.  */
  98 # define IS_ABSOLUTE(f) \
  99  ((f)[0] == '/' || (f)[0] == '\\' || (f)[0] && (f)[1] == ':')
 100
 101 /* The executable extension.  */
 102 # define EXE_EXT        ".exe"
 103
 104 /* The system null device.  */
 105 # define NULL_DEV       "NUL"
 106
 107 /* The default place to create temporary files.  */
 108 # ifndef P_tmpdir
 109 #  ifdef _P_tmpdir
 110 #   define P_tmpdir     _P_tmpdir
 111 #  else
 112 #   define P_tmpdir     "c:/temp"
 113 #  endif
 114 # endif
 115
 116 /* Prototypes.  */
 117 # ifdef __cplusplus
 118   extern "C" {
 119 # endif
 120     char       * system_shell_name(void);
 121     const char * system_shell_dash_c(void);
 122     int          is_system_shell(const char *);
 123 # ifdef __cplusplus
 124   }
 125 # endif
 126
 127 #endif
 128
 129 #if defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__)
 130 /* Win32 implementations which use the Microsoft runtime library
 131  * are prone to hanging when a pipe reader quits with unread data in the pipe.
 132  * `gtroff' avoids this, by invoking `FLUSH_INPUT_PIPE()', defined as ... */
 133 # define FLUSH_INPUT_PIPE(fd)                 \
 134  do if (!isatty(fd))                          \
 135  {                                            \
 136    char drain[BUFSIZ];                        \
 137    while (read(fd, drain, sizeof(drain)) > 0) \
 138      ;                                        \
 139  } while (0)
 140
 141 /* The Microsoft runtime library also has a broken argument passing mechanism,
 142  * which may result in improper grouping of arguments passed to a child process
 143  * by the `spawn()' family of functions.  In `groff', only the `spawnvp()'
 144  * function is affected; we work around this defect, by substituting a
 145  * wrapper function in place of `spawnvp()' calls. */
 146
 147 # ifdef __cplusplus
 148   extern "C" {
 149 # endif
 150   int spawnvp_wrapper(int, char *, char **);
 151 # ifdef __cplusplus
 152   }
 153 # endif
 154 # ifndef SPAWN_FUNCTION_WRAPPERS
 155 #  undef  spawnvp
 156 #  define spawnvp      spawnvp_wrapper
 157 #  undef  _spawnvp
 158 #  define _spawnvp     spawnvp
 159 # endif /* SPAWN_FUNCTION_WRAPPERS */
 160
 161 #else
 162 /* Other implementations do not suffer from Microsoft runtime bugs,
 163  * but `gtroff' requires a dummy definition for FLUSH_INPUT_PIPE() */
 164 # define FLUSH_INPUT_PIPE(fd)   do {} while(0)
 165 #endif
 166
 167 /* Defaults, for Posix systems.  */
 168
 169 #ifndef SET_BINARY
 170 # define SET_BINARY(f)  do {} while(0)
 171 #endif
 172 #ifndef FOPEN_RB
 173 # define FOPEN_RB       "r"
 174 #endif
 175 #ifndef FOPEN_WB
 176 # define FOPEN_WB       "w"
 177 #endif
 178 #ifndef FOPEN_RWB
 179 # define FOPEN_RWB      "w+"
 180 #endif
 181 #ifndef POPEN_RT
 182 # define POPEN_RT       "r"
 183 #endif
 184 #ifndef POPEN_WT
 185 # define POPEN_WT       "w"
 186 #endif
 187 #ifndef O_BINARY
 188 # define O_BINARY       0
 189 #endif
 190 #ifndef BSHELL
 191 # define BSHELL         "/bin/sh"
 192 #endif
 193 #ifndef BSHELL_DASH_C
 194 # define BSHELL_DASH_C  "-c"
 195 #endif
 196 #ifndef IS_BSHELL
 197 # define IS_BSHELL(s)   ((s) && strcmp(s,BSHELL) == 0)
 198 #endif
 199 #ifndef PATH_SEP
 200 # define PATH_SEP       ":"
 201 # define PATH_SEP_CHAR  ':'
 202 #endif
 203 #ifndef DIR_SEPS
 204 # define DIR_SEPS       "/"
 205 #endif
 206 #ifndef IS_ABSOLUTE
 207 # define IS_ABSOLUTE(f) ((f)[0] == '/')
 208 #endif
 209 #ifndef EXE_EXT
 210 # define EXE_EXT        ""
 211 #endif
 212 #ifndef NULL_DEV
 213 # define NULL_DEV       "/dev/null"
 214 #endif
 215 #ifndef GS_NAME
 216 # define GS_NAME        "gs"
 217 #endif
 218 #ifndef WAIT
 219 # define WAIT(s,p,m)    wait(s)
 220 #endif
 221 #ifndef _WAIT_CHILD
 222 # define _WAIT_CHILD    0
 223 #endif