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 /*
  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 #ifndef __DJGPP__
  34 You lose; /* Emacs for DOS must be compiled with DJGPP */
  35 #endif
  36
  37 #define DOS_NT  /* MSDOS or WINDOWSNT */
  38 #undef BSD_SYSTEM
  39
  40 /* SYSTEM_TYPE should indicate the kind of system you are using.
  41  It sets the Lisp variable system-type.  */
  42
  43 #define SYSTEM_TYPE "ms-dos"
  44
  45 #define SYMS_SYSTEM syms_of_dosfns();syms_of_msdos();syms_of_win16select()
  46
  47 /* NOMULTIPLEJOBS should be defined if your system's shell
  48  does not have "job control" (the ability to stop a program,
  49  run some other program, then continue the first one).  */
  50
  51 #define NOMULTIPLEJOBS
  52
  53 #define SYSV_SYSTEM_DIR
  54
  55 /* Define this symbol if your system has the functions bcopy, etc. */
  56
  57 #define BSTRING
  58
  59 /* Define this is the compiler understands `volatile'.  */
  60 #define HAVE_VOLATILE
  61
  62
  63 /* subprocesses should be defined if you want to
  64    have code for asynchronous subprocesses
  65    (as used in M-x compile and M-x shell).
  66    This is the only system that needs this.  */
  67
  68 #undef subprocesses
  69
  70 /* If your system uses COFF (Common Object File Format) then define the
  71    preprocessor symbol "COFF". */
  72
  73 #define COFF
  74
  75 /* Here, on a separate page, add any special hacks needed
  76    to make Emacs work on this system.  For example,
  77    you might define certain system call names that don't
  78    exist on your system, or that do different things on
  79    your system and must be used only through an encapsulation
  80    (Which you should place, by convention, in sysdep.c).  */
  81 \f
  82 /* Avoid incompatibilities between gmalloc.c and system header files
  83    in how to declare valloc.  */
  84 #define GMALLOC_INHIBIT_VALLOC
  85
  86 /* This overrides the default value on editfns.c, since DJGPP
  87    does not have pw->pw_gecos.  */
  88 #define USER_FULL_NAME (getenv ("NAME"))
  89
  90 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
  91    but they will run slower.  */
  92
  93 #define _setjmp setjmp
  94 #define _longjmp longjmp
  95
  96 #define DATA_START  (&etext + 1)
  97 #define TEXT_START  &start
  98
  99 #define _NAIVE_DOS_REGS
 100
 101 #define ORDINARY_LINK
 102
 103 /* command.com does not understand `...` so we define this.  */
 104 #define LIB_GCC -Lgcc
 105 #define SEPCHAR ';'
 106
 107 #define NULL_DEVICE "nul"
 108
 109 #define HAVE_INVERSE_HYPERBOLIC
 110 #define FLOAT_CHECK_DOMAIN
 111
 112 /* When $TERM is "internal" then this is substituted:  */
 113 #define INTERNAL_TERMINAL "pc|bios|IBM PC with color display:\
 114 :co#80:li#25:Co#16:pa#256:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:\
 115 :se=</SO>:so=<SO>:us=<UL>:ue=</UL>:md=<BD>:mh=<DIM>:mb=<BL>:mr=<RV>:me=<NV>:\
 116 :AB=<BG %d>:AF=<FG %d>:op=<DefC>:"
 117
 118 /* Define this to a function (Fdowncase, Fupcase) if your file system
 119    likes that */
 120 #define FILE_SYSTEM_CASE Fmsdos_downcase_filename
 121
 122 /* Define this to be the separator between devices and paths */
 123 #define DEVICE_SEP ':'
 124
 125 /* We'll support either convention on MSDOG.  */
 126 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
 127 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
 128
 129 /* bcopy under djgpp is quite safe */
 130 #define GAP_USE_BCOPY
 131 #define BCOPY_UPWARD_SAFE 1
 132 #define BCOPY_DOWNWARD_SAFE 1
 133
 134 /* Mode line description of a buffer's type.  */
 135 #define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
 136
 137 /* Do we have POSIX signals?  */
 138 #define POSIX_SIGNALS
 139
 140 /* We have (the code to control) a mouse.  */
 141 #define HAVE_MOUSE
 142
 143 /* We canuse mouse menus.  */
 144 #define HAVE_MENUS
 145
 146 /* Define one of these for easier conditionals.  */
 147 #ifdef HAVE_X_WINDOWS
 148 /* We need a little extra space, see ../../lisp/loadup.el and the
 149    commentary below, in the non-X branch.  The 140KB number was
 150    measured on GNU/Linux and on MS-WIndows.  */
 151 #define SYSTEM_PURESIZE_EXTRA (-170000+140000)
 152 #define LIBX11_SYSTEM -lxext -lsys
 153 #else
 154 /* We need a little extra space, see ../../lisp/loadup.el.
 155    As of 20091024, DOS-specific files use up 62KB of pure space.  But
 156    overall, we end up wasting 130KB of pure space, because
 157    BASE_PURESIZE starts at 1.47MB, while we need only 1.3MB (including
 158    non-DOS specific files and load history; the latter is about 55K,
 159    but depends on the depth of the top-level Emacs directory in the
 160    directory tree).  Given the unknown policy of different DPMI
 161    hosts regarding loading of untouched pages, I'm not going to risk
 162    enlarging Emacs footprint by another 100+ KBytes.  */
 163 #define SYSTEM_PURESIZE_EXTRA (-170000+65000)
 164 #endif
 165
 166 /* Tell the garbage collector that setjmp is known to save all
 167    registers relevant for conservative garbage collection in the
 168    jmp_buf.  */
 169
 170 #define GC_SETJMP_WORKS 1
 171 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 172
 173 /* arch-tag: d184f860-815d-4ff4-8187-d05c0f3c37d0
 174    (do not change this comment) */