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, 2009, 2010  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 /* Define symbols to identify the version of Unix this is.
  25    Define all the symbols that apply correctly.  */
  26 #ifndef MSDOS
  27 #define MSDOS
  28 #endif
  29
  30 #ifndef __DJGPP__
  31 You lose; /* Emacs for DOS must be compiled with DJGPP */
  32 #endif
  33
  34 #define DOS_NT  /* MSDOS or WINDOWSNT */
  35 #undef BSD_SYSTEM
  36
  37 /* SYSTEM_TYPE should indicate the kind of system you are using.
  38    It sets the Lisp variable system-type.  */
  39 #define SYSTEM_TYPE "ms-dos"
  40
  41 #define SYMS_SYSTEM syms_of_dosfns();syms_of_msdos();syms_of_win16select()
  42
  43 #define SYSV_SYSTEM_DIR
  44
  45 /* Define this is the compiler understands `volatile'.  */
  46 #define HAVE_VOLATILE
  47
  48
  49 /* subprocesses should be defined if you want to have code for
  50    asynchronous subprocesses (as used in M-x compile and M-x shell).
  51    This is the only system that needs this.  */
  52 #undef subprocesses
  53
  54 /* If your system uses COFF (Common Object File Format) then define the
  55    preprocessor symbol "COFF".  */
  56 #define COFF
  57
  58 /* Here, on a separate page, add any special hacks needed to make
  59    Emacs work on this system.  For example, you might define certain
  60    system call names that don't exist on your system, or that do
  61    different things on your system and must be used only through an
  62    encapsulation (which you should place, by convention, in sysdep.c).  */
  63 \f
  64 /* Avoid incompatibilities between gmalloc.c and system header files
  65    in how to declare valloc.  */
  66 #define GMALLOC_INHIBIT_VALLOC
  67
  68 /* This overrides the default value on editfns.c, since DJGPP
  69    does not have pw->pw_gecos.  */
  70 #define USER_FULL_NAME (getenv ("NAME"))
  71
  72 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
  73    but they will run slower.  */
  74 #define _setjmp setjmp
  75 #define _longjmp longjmp
  76
  77 #define DATA_START  (&etext + 1)
  78 #define TEXT_START  &start
  79
  80 #define _NAIVE_DOS_REGS
  81
  82 /* command.com does not understand `...` so we define this.  */
  83 #define SEPCHAR ';'
  84
  85 #define NULL_DEVICE "nul"
  86
  87 #define HAVE_INVERSE_HYPERBOLIC
  88 #define FLOAT_CHECK_DOMAIN
  89
  90 /* When $TERM is "internal" then this is substituted:  */
  91 #define INTERNAL_TERMINAL "pc|bios|IBM PC with color display:\
  92 :co#80:li#25:Co#16:pa#256:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:\
  93 :se=</SO>:so=<SO>:us=<UL>:ue=</UL>:md=<BD>:mh=<DIM>:mb=<BL>:mr=<RV>:me=<NV>:\
  94 :AB=<BG %d>:AF=<FG %d>:op=<DefC>:"
  95
  96 /* Define this to a function (Fdowncase, Fupcase) if your file system
  97    likes that.  */
  98 #define FILE_SYSTEM_CASE Fmsdos_downcase_filename
  99
 100 /* Define this to be the separator between devices and paths.  */
 101 #define DEVICE_SEP ':'
 102
 103 /* We'll support either convention on MSDOG.  */
 104 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
 105 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
 106
 107
 108 /* Mode line description of a buffer's type.  */
 109 #define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
 110
 111 /* We have (the code to control) a mouse.  */
 112 #define HAVE_MOUSE
 113
 114 /* We can use mouse menus.  */
 115 #define HAVE_MENUS
 116
 117 /* Define one of these for easier conditionals.  */
 118 #ifdef HAVE_X_WINDOWS
 119 /* We need a little extra space, see ../../lisp/loadup.el and the
 120    commentary below, in the non-X branch.  The 140KB number was
 121    measured on GNU/Linux and on MS-WIndows.  */
 122 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
 123 #else
 124 /* We need a little extra space, see ../../lisp/loadup.el.
 125    As of 20091024, DOS-specific files use up 62KB of pure space.  But
 126    overall, we end up wasting 130KB of pure space, because
 127    BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
 128    non-DOS specific files and load history; the latter is about 55K,
 129    but depends on the depth of the top-level Emacs directory in the
 130    directory tree).  Given the unknown policy of different DPMI
 131    hosts regarding loading of untouched pages, I'm not going to risk
 132    enlarging Emacs footprint by another 100+ KBytes.  */
 133 #define SYSTEM_PURESIZE_EXTRA (-170000+65000)
 134 #endif
 135
 136 /* Tell the garbage collector that setjmp is known to save all
 137    registers relevant for conservative garbage collection in the jmp_buf.  */
 138 #define GC_SETJMP_WORKS 1
 139 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 140
 141 #define NO_REMAP
 142
 143 /* arch-tag: d184f860-815d-4ff4-8187-d05c0f3c37d0
 144    (do not change this comment) */