src/s/msdos.h

   1 /* System description file for MS-DOS
   2
   3    Copyright (C) 1993, 1996 Free Software Foundation, Inc.
   4
   5 This file is part of GNU Emacs.
   6
   7 GNU Emacs is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 GNU Emacs is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with GNU Emacs; see the file COPYING.  If not, write to
  19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  20 Boston, MA 02111-1307, USA.  */
  21
  22 /* Note: lots of stuff here was taken from s-msdos.h in demacs. */
  23
  24
  25 /*
  26  *      Define symbols to identify the version of Unix this is.
  27  *      Define all the symbols that apply correctly.
  28  */
  29
  30 /* #define UNIPLUS */
  31 /* #define USG5 */
  32 /* #define USG */
  33 /* #define HPUX */
  34 /* #define UMAX */
  35 /* #define BSD4_1 */
  36 /* #define BSD4_2 */
  37 /* #define BSD4_3 */
  38 /* #define BSD_SYSTEM */
  39 /* #define VMS */
  40 #ifndef MSDOS
  41 #define MSDOS
  42 #endif
  43
  44 #ifdef __GO32__
  45 #ifndef __DJGPP__
  46 #define __DJGPP__ 1     /* V2 defines __DJGPP__ == 2 */
  47 #endif
  48 #else
  49 You lose; /* Emacs for DOS must be compiled with DJGPP */
  50 #endif
  51
  52 #define DOS_NT  /* MSDOS or WINDOWSNT */
  53 #undef BSD_SYSTEM
  54 #undef VMS
  55
  56 /* SYSTEM_TYPE should indicate the kind of system you are using.
  57  It sets the Lisp variable system-type.  */
  58
  59 #define SYSTEM_TYPE "ms-dos"
  60
  61 #define SYMS_SYSTEM syms_of_dosfns();syms_of_msdos();syms_of_win16select()
  62
  63 /* NOMULTIPLEJOBS should be defined if your system's shell
  64  does not have "job control" (the ability to stop a program,
  65  run some other program, then continue the first one).  */
  66
  67 #define NOMULTIPLEJOBS
  68
  69 /* Emacs can read input using SIGIO and buffering characters itself,
  70    or using CBREAK mode and making C-g cause SIGINT.
  71    The choice is controlled by the variable interrupt_input.
  72    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  73
  74    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  75    CBREAK mode has two disadvantages
  76      1) At least in 4.2, it is impossible to handle the Meta key properly.
  77         I hear that in system V this problem does not exist.
  78      2) Control-G causes output to be discarded.
  79         I do not know whether this can be fixed in system V.
  80
  81    Another method of doing input is planned but not implemented.
  82    It would have Emacs fork off a separate process
  83    to read the input and send it to the true Emacs process
  84    through a pipe.
  85 */
  86
  87 /* #define INTERRUPT_INPUT */
  88
  89 /* Letter to use in finding device name of first pty,
  90   if system supports pty's.  'a' means it is /dev/ptya0  */
  91
  92 /* #define FIRST_PTY_LETTER 'a' */
  93
  94 /*
  95  *      Define HAVE_PTYS if the system supports pty devices.
  96  */
  97
  98 /* #define HAVE_PTYS */
  99
 100 /*
 101  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
 102  *      The 4.2 opendir, etc., library functions.
 103  */
 104
 105 /* #define NONSYSTEM_DIR_LIBRARY */
 106
 107 #define SYSV_SYSTEM_DIR
 108
 109 /* Define this symbol if your system has the functions bcopy, etc. */
 110
 111 #define BSTRING
 112
 113 /* Define this is the compiler understands `volatile'.  */
 114 #define HAVE_VOLATILE
 115
 116
 117 /* subprocesses should be defined if you want to
 118    have code for asynchronous subprocesses
 119    (as used in M-x compile and M-x shell).
 120    This is generally OS dependent, and not supported
 121    under most USG systems. */
 122
 123 #undef subprocesses
 124
 125 /* If your system uses COFF (Common Object File Format) then define the
 126    preprocessor symbol "COFF". */
 127
 128 #define COFF
 129
 130 /* define MAIL_USE_FLOCK if the mailer uses flock
 131    to interlock access to /usr/spool/mail/$USER.
 132    The alternative is that a lock file named
 133    /usr/spool/mail/$USER.lock.  */
 134
 135 /* #define MAIL_USE_FLOCK */
 136
 137 /* Define CLASH_DETECTION if you want lock files to be written
 138    so that Emacs can tell instantly when you try to modify
 139    a file that someone else has modified in his Emacs.  */
 140
 141 /* #define CLASH_DETECTION */
 142
 143 /* Here, on a separate page, add any special hacks needed
 144    to make Emacs work on this system.  For example,
 145    you might define certain system call names that don't
 146    exist on your system, or that do different things on
 147    your system and must be used only through an encapsulation
 148    (Which you should place, by convention, in sysdep.c).  */
 149 \f
 150 /* Avoid incompatibilities between gmalloc.c and system header files
 151    in how to declare valloc.  */
 152 #define GMALLOC_INHIBIT_VALLOC
 153
 154 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 155    but they will run slower.  */
 156
 157 #define _setjmp setjmp
 158 #define _longjmp longjmp
 159
 160 #if __DJGPP__ < 2
 161
 162 #define NO_MODE_T
 163
 164 /* New chdir () routine.
 165    DJGPP v2.0 and later doesn't need it because its chdir() does
 166    set the drive itself. */
 167 #ifdef chdir
 168 #undef chdir
 169 #endif
 170 #define chdir sys_chdir
 171
 172 #define LIBS_SYSTEM -lpc  /* isn't required in DJGPP v2.0, either */
 173
 174 #endif /* __DJGPP__ < 2 */
 175
 176 #if __DJGPP__ > 1
 177
 178 #define DATA_START  (&etext + 1)
 179 #define TEXT_START  &start
 180 #define TEXT_END    &etext
 181
 182 #define _NAIVE_DOS_REGS
 183
 184 #else /* not __DJGPP__ > 1 */
 185
 186 /* This somehow needs to be defined even though we use COFF.  */
 187 #define TEXT_START -1
 188
 189 #endif /* not __DJGPP__ > 1 */
 190
 191 #define ORDINARY_LINK
 192
 193 /* command.com does not understand `...` so we define this.  */
 194 #define LIB_GCC -Lgcc
 195 #define DONT_NEED_ENVIRON
 196 #define SEPCHAR ';'
 197
 198 #define NULL_DEVICE "nul"
 199 #define EXEC_SUFFIXES ".exe:.com:.bat:"
 200
 201 #if __DJGPP__ < 2
 202 #define O_RDONLY        0x0001
 203 #define O_WRONLY        0x0002
 204 #define O_RDWR          0x0004
 205 #define O_CREAT         0x0100
 206 #define O_TRUNC         0x0200
 207 #define O_EXCL          0x0400
 208 #define O_APPEND        0x0800
 209 #define O_TEXT          0x4000
 210 #define O_BINARY        0x8000
 211 #define NO_MATHERR
 212 #endif
 213
 214 #define HAVE_INVERSE_HYPERBOLIC
 215 #define FLOAT_CHECK_DOMAIN
 216
 217 /* When $TERM is "internal" then this is substituted:  */
 218 #define INTERNAL_TERMINAL "pc|bios|IBM PC with colour display:\
 219 :co#80:li#25:Co#16:pa#256:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:\
 220 :se=</SO>:so=<SO>:us=<UL>:ue=</UL>:md=<BD>:mh=<DIM>:mb=<BL>:mr=<RV>:me=<NV>:\
 221 :AB=<BG %d>:AF=<FG %d>:op=<DefC>:"
 222
 223 /* Define this to a function (Fdowncase, Fupcase) if your file system
 224    likes that */
 225 #define FILE_SYSTEM_CASE Fmsdos_downcase_filename
 226
 227 /* Define this to be the separator between devices and paths */
 228 #define DEVICE_SEP ':'
 229
 230 /* We'll support either convention on MSDOG.  */
 231 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
 232 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
 233
 234 /* Call init_gettimeofday when TZ changes.  */
 235 #if __DJGPP__ < 2
 236 #define LOCALTIME_CACHE
 237 #define tzset init_gettimeofday
 238 #endif
 239
 240 /* bcopy under djgpp is quite safe */
 241 #define GAP_USE_BCOPY
 242 #define BCOPY_UPWARD_SAFE 1
 243 #define BCOPY_DOWNWARD_SAFE 1
 244
 245 /* Mode line description of a buffer's type.  */
 246 #define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
 247
 248 /* Do we have POSIX signals?  */
 249 #if __DJGPP__ > 1
 250 #define POSIX_SIGNALS
 251 #endif
 252
 253 /* We have (the code to control) a mouse.  */
 254 #define HAVE_MOUSE
 255
 256 /* We canuse mouse menus.  */
 257 #define HAVE_MENUS
 258
 259 /* We have support for faces.  */
 260 #define HAVE_FACES
 261
 262 /* Define one of these for easier conditionals.  */
 263 #ifdef HAVE_X_WINDOWS
 264 /* We need a little extra space, see ../../lisp/loadup.el */
 265 #define SYSTEM_PURESIZE_EXTRA 15000
 266 #define HAVE_X11R5
 267 #define LIBX11_SYSTEM -lxext -lsys
 268 #else
 269 /* We need a little extra space, see ../../lisp/loadup.el */
 270 #define SYSTEM_PURESIZE_EXTRA 60000
 271 #endif
 272
 273 /* Tell that garbage collector that setjmp is known to save all
 274    registers relevant for conservative garbage collection in the
 275    jmp_buf.  */
 276
 277 #define GC_SETJMP_WORKS 1