gnu/dist/groff/src/include/nonposix.h

   1 /*      $NetBSD$        */
   2
   3 /* Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
   4    Free Software Foundation, Inc.
   5      Written by Eli Zaretskii (eliz@is.elta.co.il)
   6
   7 This file is part of groff.
   8
   9 groff is free software; you can redistribute it and/or modify it under
  10 the terms of the GNU General Public License as published by the Free
  11 Software Foundation; either version 2, or (at your option) any later
  12 version.
  13
  14 groff is distributed in the hope that it will be useful, but WITHOUT ANY
  15 WARRANTY; without even the implied warranty of MERCHANTABILITY or
  16 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  17 for more details.
  18
  19 You should have received a copy of the GNU General Public License along
  20 with groff; see the file COPYING.  If not, write to the Free Software
  21 Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */
  22
  23 /* This header file compartmentalize all idiosyncrasies of non-Posix
  24    systems, such as MS-DOS, MS-Windows, etc.  It should be loaded after
  25    the system headers like stdio.h to protect against warnings and error
  26    messages w.r.t. redefining macros. */
  27
  28 #if defined _MSC_VER
  29 # ifndef _WIN32
  30 #  define _WIN32
  31 # endif
  32 #endif
  33
  34 #if defined(__MSDOS__) || defined(__EMX__) \
  35     || (defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__))
  36
  37 /* Binary I/O nuisances. */
  38 # include <fcntl.h>
  39 # include <io.h>
  40 # ifdef HAVE_UNISTD_H
  41 #  include <unistd.h>
  42 # endif
  43 # ifndef STDIN_FILENO
  44 #  define STDIN_FILENO  0
  45 #  define STDOUT_FILENO 1
  46 #  define STDERR_FILENO 2
  47 # endif
  48 # ifdef HAVE_DIRECT_H
  49 #  include <direct.h>
  50 # endif
  51 # ifdef HAVE_PROCESS_H
  52 #  include <process.h>
  53 # endif
  54 # if defined(_MSC_VER) || defined(__MINGW32__)
  55 #  define POPEN_RT      "rt"
  56 #  define POPEN_WT      "wt"
  57 #  define popen(c,m)    _popen(c,m)
  58 #  define pclose(p)     _pclose(p)
  59 #  define pipe(pfd)     _pipe((pfd),0,_O_BINARY|_O_NOINHERIT)
  60 #  define mkdir(p,m)    _mkdir(p)
  61 #  define setmode(f,m)  _setmode(f,m)
  62 #  define WAIT(s,p,m)   _cwait(s,p,m)
  63 #  define creat(p,m)    _creat(p,m)
  64 #  define read(f,b,s)   _read(f,b,s)
  65 #  define write(f,b,s)  _write(f,b,s)
  66 #  define dup(f)        _dup(f)
  67 #  define dup2(f1,f2)   _dup2(f1,f2)
  68 #  define close(f)      _close(f)
  69 #  define isatty(f)     _isatty(f)
  70 #  define access(p,m)   _access(p,m)
  71 # endif
  72 # define SET_BINARY(f)  do {if (!isatty(f)) setmode(f,O_BINARY);} while(0)
  73 # define FOPEN_RB       "rb"
  74 # define FOPEN_WB       "wb"
  75 # define FOPEN_RWB      "wb+"
  76 # ifndef O_BINARY
  77 #  ifdef _O_BINARY
  78 #   define O_BINARY     (_O_BINARY)
  79 #  endif
  80 # endif
  81
  82 /* The system shell.  Groff assumes a Unixy shell, but non-Posix
  83    systems don't have standard places where it lives, and might not
  84    have it installed to begin with.  We want to give them some leeway.  */
  85 # ifdef __EMX__
  86 #  define getcwd(b,s)   _getcwd2(b,s)
  87 # else
  88 #  define BSHELL        (system_shell_name())
  89 #  define BSHELL_DASH_C (system_shell_dash_c())
  90 #  define IS_BSHELL(s)  (is_system_shell(s))
  91 # endif
  92
  93 /* The separator for directories in PATH and other environment
  94    variables.  */
  95 # define PATH_SEP       ";"
  96 # define PATH_SEP_CHAR  ';'
  97
  98 /* Characters that separate directories in a path name.  */
  99 # define DIR_SEPS       "/\\:"
 100
 101 /* How to tell if the argument is an absolute file name.  */
 102 # define IS_ABSOLUTE(f) \
 103  ((f)[0] == '/' || (f)[0] == '\\' || (f)[0] && (f)[1] == ':')
 104
 105 /* The executable extension.  */
 106 # define EXE_EXT        ".exe"
 107
 108 /* Possible executable extensions.  */
 109 # define PATH_EXT       ".com;.exe;.bat;.cmd"
 110
 111 /* The system null device.  */
 112 # define NULL_DEV       "NUL"
 113
 114 /* The default place to create temporary files.  */
 115 # ifndef P_tmpdir
 116 #  ifdef _P_tmpdir
 117 #   define P_tmpdir     _P_tmpdir
 118 #  else
 119 #   define P_tmpdir     "c:/temp"
 120 #  endif
 121 # endif
 122
 123 /* Prototypes.  */
 124 # ifdef __cplusplus
 125   extern "C" {
 126 # endif
 127     char       * system_shell_name(void);
 128     const char * system_shell_dash_c(void);
 129     int          is_system_shell(const char *);
 130 # ifdef __cplusplus
 131   }
 132 # endif
 133
 134 #endif
 135
 136 #if defined(_WIN32) && !defined(_UWIN) && !defined(__CYGWIN__)
 137 /* Win32 implementations which use the Microsoft runtime library
 138  * are prone to hanging when a pipe reader quits with unread data in the pipe.
 139  * `gtroff' avoids this, by invoking `FLUSH_INPUT_PIPE()', defined as ... */
 140 # define FLUSH_INPUT_PIPE(fd)                 \
 141  do if (!isatty(fd))                          \
 142  {                                            \
 143    char drain[BUFSIZ];                        \
 144    while (read(fd, drain, sizeof(drain)) > 0) \
 145      ;                                        \
 146  } while (0)
 147
 148 /* The Microsoft runtime library also has a broken argument passing mechanism,
 149  * which may result in improper grouping of arguments passed to a child process
 150  * by the `spawn()' family of functions.  In `groff', only the `spawnvp()'
 151  * function is affected; we work around this defect, by substituting a
 152  * wrapper function in place of `spawnvp()' calls. */
 153
 154 # ifdef __cplusplus
 155   extern "C" {
 156 # endif
 157   int spawnvp_wrapper(int, char *, char **);
 158 # ifdef __cplusplus
 159   }
 160 # endif
 161 # ifndef SPAWN_FUNCTION_WRAPPERS
 162 #  undef  spawnvp
 163 #  define spawnvp      spawnvp_wrapper
 164 #  undef  _spawnvp
 165 #  define _spawnvp     spawnvp
 166 # endif /* SPAWN_FUNCTION_WRAPPERS */
 167
 168 #else
 169 /* Other implementations do not suffer from Microsoft runtime bugs,
 170  * but `gtroff' requires a dummy definition for FLUSH_INPUT_PIPE() */
 171 # define FLUSH_INPUT_PIPE(fd)   do {} while(0)
 172 #endif
 173
 174 /* Defaults, for Posix systems.  */
 175
 176 #ifndef SET_BINARY
 177 # define SET_BINARY(f)  do {} while(0)
 178 #endif
 179 #ifndef FOPEN_RB
 180 # define FOPEN_RB       "r"
 181 #endif
 182 #ifndef FOPEN_WB
 183 # define FOPEN_WB       "w"
 184 #endif
 185 #ifndef FOPEN_RWB
 186 # define FOPEN_RWB      "w+"
 187 #endif
 188 #ifndef POPEN_RT
 189 # define POPEN_RT       "r"
 190 #endif
 191 #ifndef POPEN_WT
 192 # define POPEN_WT       "w"
 193 #endif
 194 #ifndef O_BINARY
 195 # define O_BINARY       0
 196 #endif
 197 #ifndef BSHELL
 198 # define BSHELL         "/bin/sh"
 199 #endif
 200 #ifndef BSHELL_DASH_C
 201 # define BSHELL_DASH_C  "-c"
 202 #endif
 203 #ifndef IS_BSHELL
 204 # define IS_BSHELL(s)   ((s) && strcmp(s,BSHELL) == 0)
 205 #endif
 206 #ifndef PATH_SEP
 207 # define PATH_SEP       ":"
 208 # define PATH_SEP_CHAR  ':'
 209 #endif
 210 #ifndef DIR_SEPS
 211 # define DIR_SEPS       "/"
 212 #endif
 213 #ifndef IS_ABSOLUTE
 214 # define IS_ABSOLUTE(f) ((f)[0] == '/')
 215 #endif
 216 #ifndef EXE_EXT
 217 # define EXE_EXT        ""
 218 #endif
 219 #ifndef PATH_EXT
 220 # define PATH_EXT       ""
 221 #endif
 222 #ifndef NULL_DEV
 223 # define NULL_DEV       "/dev/null"
 224 #endif
 225 #ifndef GS_NAME
 226 # define GS_NAME        "gs"
 227 #endif
 228 #ifndef WAIT
 229 # define WAIT(s,p,m)    wait(s)
 230 #endif
 231 #ifndef _WAIT_CHILD
 232 # define _WAIT_CHILD    0
 233 #endif