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 symbol if your system has the functions bcopy, etc.  */
  46 #define BSTRING
  47
  48 /* Define this is the compiler understands `volatile'.  */
  49 #define HAVE_VOLATILE
  50
  51
  52 /* subprocesses should be defined if you want to have code for
  53    asynchronous subprocesses (as used in M-x compile and M-x shell).
  54    This is the only system that needs this.  */
  55 #undef subprocesses
  56
  57 /* If your system uses COFF (Common Object File Format) then define the
  58    preprocessor symbol "COFF".  */
  59 #define COFF
  60
  61 /* Here, on a separate page, add any special hacks needed to make
  62    Emacs work on this system.  For example, you might define certain
  63    system call names that don't exist on your system, or that do
  64    different things on your system and must be used only through an
  65    encapsulation (which you should place, by convention, in sysdep.c).  */
  66 \f
  67 /* Avoid incompatibilities between gmalloc.c and system header files
  68    in how to declare valloc.  */
  69 #define GMALLOC_INHIBIT_VALLOC
  70
  71 /* This overrides the default value on editfns.c, since DJGPP
  72    does not have pw->pw_gecos.  */
  73 #define USER_FULL_NAME (getenv ("NAME"))
  74
  75 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
  76    but they will run slower.  */
  77 #define _setjmp setjmp
  78 #define _longjmp longjmp
  79
  80 #define DATA_START  (&etext + 1)
  81 #define TEXT_START  &start
  82
  83 #define _NAIVE_DOS_REGS
  84
  85 /* command.com does not understand `...` so we define this.  */
  86 #define SEPCHAR ';'
  87
  88 #define NULL_DEVICE "nul"
  89
  90 #define HAVE_INVERSE_HYPERBOLIC
  91 #define FLOAT_CHECK_DOMAIN
  92
  93 /* When $TERM is "internal" then this is substituted:  */
  94 #define INTERNAL_TERMINAL "pc|bios|IBM PC with color display:\
  95 :co#80:li#25:Co#16:pa#256:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:\
  96 :se=</SO>:so=<SO>:us=<UL>:ue=</UL>:md=<BD>:mh=<DIM>:mb=<BL>:mr=<RV>:me=<NV>:\
  97 :AB=<BG %d>:AF=<FG %d>:op=<DefC>:"
  98
  99 /* Define this to a function (Fdowncase, Fupcase) if your file system
 100    likes that.  */
 101 #define FILE_SYSTEM_CASE Fmsdos_downcase_filename
 102
 103 /* Define this to be the separator between devices and paths.  */
 104 #define DEVICE_SEP ':'
 105
 106 /* We'll support either convention on MSDOG.  */
 107 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
 108 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
 109
 110 /* bcopy under djgpp is quite safe.  */
 111 #define GAP_USE_BCOPY
 112 #define BCOPY_UPWARD_SAFE 1
 113 #define BCOPY_DOWNWARD_SAFE 1
 114
 115 /* Mode line description of a buffer's type.  */
 116 #define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
 117
 118 /* We have (the code to control) a mouse.  */
 119 #define HAVE_MOUSE
 120
 121 /* We can use mouse menus.  */
 122 #define HAVE_MENUS
 123
 124 /* Define one of these for easier conditionals.  */
 125 #ifdef HAVE_X_WINDOWS
 126 /* We need a little extra space, see ../../lisp/loadup.el and the
 127    commentary below, in the non-X branch.  The 140KB number was
 128    measured on GNU/Linux and on MS-WIndows.  */
 129 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
 130 #else
 131 /* We need a little extra space, see ../../lisp/loadup.el.
 132    As of 20091024, DOS-specific files use up 62KB of pure space.  But
 133    overall, we end up wasting 130KB of pure space, because
 134    BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
 135    non-DOS specific files and load history; the latter is about 55K,
 136    but depends on the depth of the top-level Emacs directory in the
 137    directory tree).  Given the unknown policy of different DPMI
 138    hosts regarding loading of untouched pages, I'm not going to risk
 139    enlarging Emacs footprint by another 100+ KBytes.  */
 140 #define SYSTEM_PURESIZE_EXTRA (-170000+65000)
 141 #endif
 142
 143 /* Tell the garbage collector that setjmp is known to save all
 144    registers relevant for conservative garbage collection in the jmp_buf.  */
 145 #define GC_SETJMP_WORKS 1
 146 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 147
 148 #define NO_REMAP
 149
 150 /* arch-tag: d184f860-815d-4ff4-8187-d05c0f3c37d0
 151    (do not change this comment) */