src/s/msdos.h

   1 /* System description file for MS-DOS
   2
   3    Copyright (C) 1993, 1996, 1997, 2001, 2002, 2003, 2004,
   4                  2005, 2006, 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, or (at your option)
  11 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; see the file COPYING.  If not, write to
  20 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  21 Boston, MA 02110-1301, USA.  */
  22
  23 /* Note: lots of stuff here was taken from s-msdos.h in demacs. */
  24
  25
  26 /*
  27  *      Define symbols to identify the version of Unix this is.
  28  *      Define all the symbols that apply correctly.
  29  */
  30
  31 /* #define UNIPLUS */
  32 /* #define USG5 */
  33 /* #define USG */
  34 /* #define HPUX */
  35 /* #define UMAX */
  36 /* #define BSD4_1 */
  37 /* #define BSD4_2 */
  38 /* #define BSD4_3 */
  39 /* #define BSD_SYSTEM */
  40 /* #define VMS */
  41 #ifndef MSDOS
  42 #define MSDOS
  43 #endif
  44
  45 #ifdef __GO32__
  46 #ifndef __DJGPP__
  47 #define __DJGPP__ 1     /* V2 defines __DJGPP__ == 2 */
  48 #endif
  49 #else
  50 You lose; /* Emacs for DOS must be compiled with DJGPP */
  51 #endif
  52
  53 #define DOS_NT  /* MSDOS or WINDOWSNT */
  54 #undef BSD_SYSTEM
  55 #undef VMS
  56
  57 /* SYSTEM_TYPE should indicate the kind of system you are using.
  58  It sets the Lisp variable system-type.  */
  59
  60 #define SYSTEM_TYPE "ms-dos"
  61
  62 #define SYMS_SYSTEM syms_of_dosfns();syms_of_msdos();syms_of_win16select()
  63
  64 /* NOMULTIPLEJOBS should be defined if your system's shell
  65  does not have "job control" (the ability to stop a program,
  66  run some other program, then continue the first one).  */
  67
  68 #define NOMULTIPLEJOBS
  69
  70 /* Emacs can read input using SIGIO and buffering characters itself,
  71    or using CBREAK mode and making C-g cause SIGINT.
  72    The choice is controlled by the variable interrupt_input.
  73    Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
  74
  75    SIGIO can be used only on systems that implement it (4.2 and 4.3).
  76    CBREAK mode has two disadvantages
  77      1) At least in 4.2, it is impossible to handle the Meta key properly.
  78         I hear that in system V this problem does not exist.
  79      2) Control-G causes output to be discarded.
  80         I do not know whether this can be fixed in system V.
  81
  82    Another method of doing input is planned but not implemented.
  83    It would have Emacs fork off a separate process
  84    to read the input and send it to the true Emacs process
  85    through a pipe.
  86 */
  87
  88 /* #define INTERRUPT_INPUT */
  89
  90 /* Letter to use in finding device name of first pty,
  91   if system supports pty's.  'a' means it is /dev/ptya0  */
  92
  93 /* #define FIRST_PTY_LETTER 'a' */
  94
  95 /*
  96  *      Define HAVE_PTYS if the system supports pty devices.
  97  */
  98
  99 /* #define HAVE_PTYS */
 100
 101 /*
 102  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
 103  *      The 4.2 opendir, etc., library functions.
 104  */
 105
 106 /* #define NONSYSTEM_DIR_LIBRARY */
 107
 108 #define SYSV_SYSTEM_DIR
 109
 110 /* Define this symbol if your system has the functions bcopy, etc. */
 111
 112 #define BSTRING
 113
 114 /* Define this is the compiler understands `volatile'.  */
 115 #define HAVE_VOLATILE
 116
 117
 118 /* subprocesses should be defined if you want to
 119    have code for asynchronous subprocesses
 120    (as used in M-x compile and M-x shell).
 121    This is generally OS dependent, and not supported
 122    under most USG systems. */
 123
 124 #undef subprocesses
 125
 126 /* If your system uses COFF (Common Object File Format) then define the
 127    preprocessor symbol "COFF". */
 128
 129 #define COFF
 130
 131 /* define MAIL_USE_FLOCK if the mailer uses flock
 132    to interlock access to /usr/spool/mail/$USER.
 133    The alternative is that a lock file named
 134    /usr/spool/mail/$USER.lock.  */
 135
 136 /* #define MAIL_USE_FLOCK */
 137
 138 /* Define CLASH_DETECTION if you want lock files to be written
 139    so that Emacs can tell instantly when you try to modify
 140    a file that someone else has modified in his Emacs.  */
 141
 142 /* #define CLASH_DETECTION */
 143
 144 /* Here, on a separate page, add any special hacks needed
 145    to make Emacs work on this system.  For example,
 146    you might define certain system call names that don't
 147    exist on your system, or that do different things on
 148    your system and must be used only through an encapsulation
 149    (Which you should place, by convention, in sysdep.c).  */
 150 \f
 151 /* Avoid incompatibilities between gmalloc.c and system header files
 152    in how to declare valloc.  */
 153 #define GMALLOC_INHIBIT_VALLOC
 154
 155 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
 156    but they will run slower.  */
 157
 158 #define _setjmp setjmp
 159 #define _longjmp longjmp
 160
 161 #if __DJGPP__ < 2
 162
 163 #define NO_MODE_T
 164
 165 /* New chdir () routine.
 166    DJGPP v2.0 and later doesn't need it because its chdir() does
 167    set the drive itself. */
 168 #ifdef chdir
 169 #undef chdir
 170 #endif
 171 #define chdir sys_chdir
 172
 173 #define LIBS_SYSTEM -lpc  /* isn't required in DJGPP v2.0, either */
 174
 175 #endif /* __DJGPP__ < 2 */
 176
 177 #if __DJGPP__ > 1
 178
 179 #define DATA_START  (&etext + 1)
 180 #define TEXT_START  &start
 181 #define TEXT_END    &etext
 182
 183 #define _NAIVE_DOS_REGS
 184
 185 #else /* not __DJGPP__ > 1 */
 186
 187 /* This somehow needs to be defined even though we use COFF.  */
 188 #define TEXT_START -1
 189
 190 #endif /* not __DJGPP__ > 1 */
 191
 192 #define ORDINARY_LINK
 193
 194 /* command.com does not understand `...` so we define this.  */
 195 #define LIB_GCC -Lgcc
 196 #define DONT_NEED_ENVIRON
 197 #define SEPCHAR ';'
 198
 199 #define NULL_DEVICE "nul"
 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 LIBX11_SYSTEM -lxext -lsys
 267 #else
 268 /* We need a little extra space, see ../../lisp/loadup.el */
 269 #define SYSTEM_PURESIZE_EXTRA 50000
 270 #endif
 271
 272 /* Tell the garbage collector that setjmp is known to save all
 273    registers relevant for conservative garbage collection in the
 274    jmp_buf.  */
 275
 276 #define GC_SETJMP_WORKS 1
 277 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 278
 279 /* arch-tag: d184f860-815d-4ff4-8187-d05c0f3c37d0
 280    (do not change this comment) */