src/s/msdos.h

   1 /* System description file for MS-DOS
   2
   3    Copyright (C) 1993, 1996, 1997, 2001, 2002, 2003, 2004, 2005, 2006,
   4                  2007, 2008 Free Software Foundation, Inc.
   5
   6 This file is part of GNU Emacs.
   7
   8 GNU Emacs is free software: you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation, either version 3 of the License, or
  11 (at your option) any later version.
  12
  13 GNU Emacs is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
  20
  21 /* Note: lots of stuff here was taken from s-msdos.h in demacs. */
  22
  23
  24 /*
  25  *      Define symbols to identify the version of Unix this is.
  26  *      Define all the symbols that apply correctly.
  27  */
  28
  29 #ifndef MSDOS
  30 #define MSDOS
  31 #endif
  32
  33 #ifdef __GO32__
  34 #ifndef __DJGPP__
  35 #define __DJGPP__ 1     /* V2 defines __DJGPP__ == 2 */
  36 #endif
  37 #else
  38 You lose; /* Emacs for DOS must be compiled with DJGPP */
  39 #endif
  40
  41 #define DOS_NT  /* MSDOS or WINDOWSNT */
  42 #undef BSD_SYSTEM
  43 #undef VMS
  44
  45 /* SYSTEM_TYPE should indicate the kind of system you are using.
  46  It sets the Lisp variable system-type.  */
  47
  48 #define SYSTEM_TYPE "ms-dos"
  49
  50 #define SYMS_SYSTEM syms_of_dosfns();syms_of_msdos();syms_of_win16select()
  51
  52 /* NOMULTIPLEJOBS should be defined if your system's shell
  53  does not have "job control" (the ability to stop a program,
  54  run some other program, then continue the first one).  */
  55
  56 #define NOMULTIPLEJOBS
  57
  58 /* Emacs can read input using SIGIO and buffering characters itself,
  59    or using CBREAK mode and making C-g cause SIGINT.
  60    The choice is controlled by the variable interrupt_input.
  61    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  62
  63    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  64    CBREAK mode has two disadvantages
  65      1) At least in 4.2, it is impossible to handle the Meta key properly.
  66         I hear that in system V this problem does not exist.
  67      2) Control-G causes output to be discarded.
  68         I do not know whether this can be fixed in system V.
  69
  70    Another method of doing input is planned but not implemented.
  71    It would have Emacs fork off a separate process
  72    to read the input and send it to the true Emacs process
  73    through a pipe.
  74 */
  75
  76 /* #define INTERRUPT_INPUT */
  77
  78 /* Letter to use in finding device name of first pty,
  79   if system supports pty's.  'a' means it is /dev/ptya0  */
  80
  81 /* #define FIRST_PTY_LETTER 'a' */
  82
  83 /*
  84  *      Define HAVE_PTYS if the system supports pty devices.
  85  */
  86
  87 /* #define HAVE_PTYS */
  88
  89 /*
  90  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  91  *      The 4.2 opendir, etc., library functions.
  92  */
  93
  94 /* #define NONSYSTEM_DIR_LIBRARY */
  95
  96 #define SYSV_SYSTEM_DIR
  97
  98 /* Define this symbol if your system has the functions bcopy, etc. */
  99
 100 #define BSTRING
 101
 102 /* Define this is the compiler understands `volatile'.  */
 103 #define HAVE_VOLATILE
 104
 105
 106 /* subprocesses should be defined if you want to
 107    have code for asynchronous subprocesses
 108    (as used in M-x compile and M-x shell).
 109    This is generally OS dependent, and not supported
 110    under most USG systems. */
 111
 112 #undef subprocesses
 113
 114 /* If your system uses COFF (Common Object File Format) then define the
 115    preprocessor symbol "COFF". */
 116
 117 #define COFF
 118
 119 /* define MAIL_USE_FLOCK if the mailer uses flock
 120    to interlock access to /usr/spool/mail/$USER.
 121    The alternative is that a lock file named
 122    /usr/spool/mail/$USER.lock.  */
 123
 124 /* #define MAIL_USE_FLOCK */
 125
 126 /* Define CLASH_DETECTION if you want lock files to be written
 127    so that Emacs can tell instantly when you try to modify
 128    a file that someone else has modified in his Emacs.  */
 129
 130 /* #define CLASH_DETECTION */
 131
 132 /* Here, on a separate page, add any special hacks needed
 133    to make Emacs work on this system.  For example,
 134    you might define certain system call names that don't
 135    exist on your system, or that do different things on
 136    your system and must be used only through an encapsulation
 137    (Which you should place, by convention, in sysdep.c).  */
 138 \f
 139 /* Avoid incompatibilities between gmalloc.c and system header files
 140    in how to declare valloc.  */
 141 #define GMALLOC_INHIBIT_VALLOC
 142
 143 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 144    but they will run slower.  */
 145
 146 #define _setjmp setjmp
 147 #define _longjmp longjmp
 148
 149 #if __DJGPP__ < 2
 150
 151 /* New chdir () routine.
 152    DJGPP v2.0 and later doesn't need it because its chdir() does
 153    set the drive itself. */
 154 #ifdef chdir
 155 #undef chdir
 156 #endif
 157 #define chdir sys_chdir
 158
 159 #define LIBS_SYSTEM -lpc  /* isn't required in DJGPP v2.0, either */
 160
 161 #endif /* __DJGPP__ < 2 */
 162
 163 #if __DJGPP__ > 1
 164
 165 #define DATA_START  (&etext + 1)
 166 #define TEXT_START  &start
 167 #define TEXT_END    &etext
 168
 169 #define _NAIVE_DOS_REGS
 170
 171 #else /* not __DJGPP__ > 1 */
 172
 173 /* This somehow needs to be defined even though we use COFF.  */
 174 #define TEXT_START -1
 175
 176 #endif /* not __DJGPP__ > 1 */
 177
 178 #define ORDINARY_LINK
 179
 180 /* command.com does not understand `...` so we define this.  */
 181 #define LIB_GCC -Lgcc
 182 #define SEPCHAR ';'
 183
 184 #define NULL_DEVICE "nul"
 185
 186 #if __DJGPP__ < 2
 187 #define O_RDONLY        0x0001
 188 #define O_WRONLY        0x0002
 189 #define O_RDWR          0x0004
 190 #define O_CREAT         0x0100
 191 #define O_TRUNC         0x0200
 192 #define O_EXCL          0x0400
 193 #define O_APPEND        0x0800
 194 #define O_TEXT          0x4000
 195 #define O_BINARY        0x8000
 196 #define NO_MATHERR
 197 #endif
 198
 199 #define HAVE_INVERSE_HYPERBOLIC
 200 #define FLOAT_CHECK_DOMAIN
 201
 202 /* When $TERM is "internal" then this is substituted:  */
 203 #define INTERNAL_TERMINAL "pc|bios|IBM PC with color display:\
 204 :co#80:li#25:Co#16:pa#256:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:\
 205 :se=</SO>:so=<SO>:us=<UL>:ue=</UL>:md=<BD>:mh=<DIM>:mb=<BL>:mr=<RV>:me=<NV>:\
 206 :AB=<BG %d>:AF=<FG %d>:op=<DefC>:"
 207
 208 /* Define this to a function (Fdowncase, Fupcase) if your file system
 209    likes that */
 210 #define FILE_SYSTEM_CASE Fmsdos_downcase_filename
 211
 212 /* Define this to be the separator between devices and paths */
 213 #define DEVICE_SEP ':'
 214
 215 /* We'll support either convention on MSDOG.  */
 216 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
 217 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
 218
 219 /* Call init_gettimeofday when TZ changes.  */
 220 #if __DJGPP__ < 2
 221 #define LOCALTIME_CACHE
 222 #define tzset init_gettimeofday
 223 #endif
 224
 225 /* bcopy under djgpp is quite safe */
 226 #define GAP_USE_BCOPY
 227 #define BCOPY_UPWARD_SAFE 1
 228 #define BCOPY_DOWNWARD_SAFE 1
 229
 230 /* Mode line description of a buffer's type.  */
 231 #define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
 232
 233 /* Do we have POSIX signals?  */
 234 #if __DJGPP__ > 1
 235 #define POSIX_SIGNALS
 236 #endif
 237
 238 /* We have (the code to control) a mouse.  */
 239 #define HAVE_MOUSE
 240
 241 /* We canuse mouse menus.  */
 242 #define HAVE_MENUS
 243
 244 /* We have support for faces.  */
 245 #define HAVE_FACES
 246
 247 /* Define one of these for easier conditionals.  */
 248 #ifdef HAVE_X_WINDOWS
 249 /* We need a little extra space, see ../../lisp/loadup.el */
 250 #define SYSTEM_PURESIZE_EXTRA 15000
 251 #define LIBX11_SYSTEM -lxext -lsys
 252 #else
 253 /* We need a little extra space, see ../../lisp/loadup.el */
 254 #define SYSTEM_PURESIZE_EXTRA 50000
 255 #endif
 256
 257 /* Tell the garbage collector that setjmp is known to save all
 258    registers relevant for conservative garbage collection in the
 259    jmp_buf.  */
 260
 261 #define GC_SETJMP_WORKS 1
 262 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 263
 264 /* arch-tag: d184f860-815d-4ff4-8187-d05c0f3c37d0
 265    (do not change this comment) */