src/s/msdos.h

   1 /* System description file for MS-DOS
   2
   3 Copyright (C) 1993, 1996-1997, 2001-2011 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 3 of the License, or
  10 (at your option) 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.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 /* Note: lots of stuff here was taken from s-msdos.h in demacs. */
  21
  22
  23 /* Define symbols to identify the version of Unix this is.
  24    Define all the symbols that apply correctly.  */
  25 #ifndef MSDOS
  26 #define MSDOS
  27 #endif
  28
  29 #ifndef __DJGPP__
  30 You lose; /* Emacs for DOS must be compiled with DJGPP */
  31 #endif
  32
  33 #define DOS_NT  /* MSDOS or WINDOWSNT */
  34 #undef BSD_SYSTEM
  35
  36 /* SYSTEM_TYPE should indicate the kind of system you are using.
  37    It sets the Lisp variable system-type.  */
  38 #define SYSTEM_TYPE "ms-dos"
  39
  40 /* subprocesses should be defined if you want to have code for
  41    asynchronous subprocesses (as used in M-x compile and M-x shell).
  42    This is the only system that needs this.  */
  43 #undef subprocesses
  44
  45 /* Here, on a separate page, add any special hacks needed to make
  46    Emacs work on this system.  For example, you might define certain
  47    system call names that don't exist on your system, or that do
  48    different things on your system and must be used only through an
  49    encapsulation (which you should place, by convention, in sysdep.c).  */
  50 \f
  51 /* Avoid incompatibilities between gmalloc.c and system header files
  52    in how to declare valloc.  */
  53 #define GMALLOC_INHIBIT_VALLOC
  54
  55 /* This overrides the default value on editfns.c, since DJGPP
  56    does not have pw->pw_gecos.  */
  57 #define USER_FULL_NAME (getenv ("NAME"))
  58
  59 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
  60    but they will run slower.  */
  61 #define _setjmp setjmp
  62 #define _longjmp longjmp
  63
  64 #define DATA_START  (&etext + 1)
  65
  66 #define _NAIVE_DOS_REGS
  67
  68 /* command.com does not understand `...` so we define this.  */
  69 #define SEPCHAR ';'
  70
  71 #define NULL_DEVICE "nul"
  72
  73 #define HAVE_INVERSE_HYPERBOLIC
  74 #define FLOAT_CHECK_DOMAIN
  75
  76 /* Start of gnulib-related stuff  */
  77
  78 /* lib/ftoastr.c wants strtold, but DJGPP only has _strtold.  DJGPP >
  79    2.03 has it, but it also has _strtold as a stub that jumps to
  80    strtold, so use _strtold in all versions.  */
  81 #define strtold _strtold
  82
  83 /* End of gnulib-related stuff.  */
  84
  85 /* When $TERM is "internal" then this is substituted:  */
  86 #define INTERNAL_TERMINAL "pc|bios|IBM PC with color display:\
  87 :co#80:li#25:Co#16:pa#256:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:\
  88 :se=</SO>:so=<SO>:us=<UL>:ue=</UL>:md=<BD>:mh=<DIM>:mb=<BL>:mr=<RV>:me=<NV>:\
  89 :AB=<BG %d>:AF=<FG %d>:op=<DefC>:"
  90
  91 /* Define this to a function (Fdowncase, Fupcase) if your file system
  92    likes that.  */
  93 #define FILE_SYSTEM_CASE Fmsdos_downcase_filename
  94
  95 /* Define this to be the separator between devices and paths.  */
  96 #define DEVICE_SEP ':'
  97
  98 /* We'll support either convention on MSDOG.  */
  99 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
 100 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
 101
 102
 103 /* Mode line description of a buffer's type.  */
 104 #define MODE_LINE_BINARY_TEXT(buf) (NILP(B_(buf,buffer_file_type)) ? "T" : "B")
 105
 106 /* We have (the code to control) a mouse.  */
 107 #define HAVE_MOUSE
 108
 109 /* We can use mouse menus.  */
 110 #define HAVE_MENUS
 111
 112 /* Define one of these for easier conditionals.  */
 113 #ifdef HAVE_X_WINDOWS
 114 /* We need a little extra space, see ../../lisp/loadup.el and the
 115    commentary below, in the non-X branch.  The 140KB number was
 116    measured on GNU/Linux and on MS-WIndows.  */
 117 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
 118 #else
 119 /* We need a little extra space, see ../../lisp/loadup.el.
 120    As of 20091024, DOS-specific files use up 62KB of pure space.  But
 121    overall, we end up wasting 130KB of pure space, because
 122    BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
 123    non-DOS specific files and load history; the latter is about 55K,
 124    but depends on the depth of the top-level Emacs directory in the
 125    directory tree).  Given the unknown policy of different DPMI
 126    hosts regarding loading of untouched pages, I'm not going to risk
 127    enlarging Emacs footprint by another 100+ KBytes.  */
 128 #define SYSTEM_PURESIZE_EXTRA (-170000+65000)
 129 #endif
 130
 131 /* Tell the garbage collector that setjmp is known to save all
 132    registers relevant for conservative garbage collection in the jmp_buf.  */
 133 #define GC_SETJMP_WORKS 1
 134 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 135