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 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 #ifdef __GO32__
  34 #ifndef __DJGPP__
  35 #define __DJGPP__ 1     /* V2 defines __DJGPP__ == 2 */
  36 #endif
  37 #else
  38 You lose; /* Emacs for DOS must be compiled with DJGPP */
  39 #endif
  40
  41 #define DOS_NT  /* MSDOS or WINDOWSNT */
  42 #undef BSD_SYSTEM
  43
  44 /* SYSTEM_TYPE should indicate the kind of system you are using.
  45  It sets the Lisp variable system-type.  */
  46
  47 #define SYSTEM_TYPE "ms-dos"
  48
  49 #define SYMS_SYSTEM syms_of_dosfns();syms_of_msdos();syms_of_win16select()
  50
  51 /* NOMULTIPLEJOBS should be defined if your system's shell
  52  does not have "job control" (the ability to stop a program,
  53  run some other program, then continue the first one).  */
  54
  55 #define NOMULTIPLEJOBS
  56
  57 #define SYSV_SYSTEM_DIR
  58
  59 /* Define this symbol if your system has the functions bcopy, etc. */
  60
  61 #define BSTRING
  62
  63 /* Define this is the compiler understands `volatile'.  */
  64 #define HAVE_VOLATILE
  65
  66
  67 /* subprocesses should be defined if you want to
  68    have code for asynchronous subprocesses
  69    (as used in M-x compile and M-x shell).
  70    This is the only system that needs this.  */
  71
  72 #undef subprocesses
  73
  74 /* If your system uses COFF (Common Object File Format) then define the
  75    preprocessor symbol "COFF". */
  76
  77 #define COFF
  78
  79 /* Here, on a separate page, add any special hacks needed
  80    to make Emacs work on this system.  For example,
  81    you might define certain system call names that don't
  82    exist on your system, or that do different things on
  83    your system and must be used only through an encapsulation
  84    (Which you should place, by convention, in sysdep.c).  */
  85 \f
  86 /* Avoid incompatibilities between gmalloc.c and system header files
  87    in how to declare valloc.  */
  88 #define GMALLOC_INHIBIT_VALLOC
  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 #if __DJGPP__ < 2
  97
  98 /* New chdir () routine.
  99    DJGPP v2.0 and later doesn't need it because its chdir() does
 100    set the drive itself. */
 101 #ifdef chdir
 102 #undef chdir
 103 #endif
 104 #define chdir sys_chdir
 105
 106 #define LIBS_SYSTEM -lpc  /* isn't required in DJGPP v2.0, either */
 107
 108 #endif /* __DJGPP__ < 2 */
 109
 110 #if __DJGPP__ > 1
 111
 112 #define DATA_START  (&etext + 1)
 113 #define TEXT_START  &start
 114
 115 #define _NAIVE_DOS_REGS
 116
 117 #else /* not __DJGPP__ > 1 */
 118
 119 /* This somehow needs to be defined even though we use COFF.  */
 120 #define TEXT_START -1
 121
 122 #endif /* not __DJGPP__ > 1 */
 123
 124 #define ORDINARY_LINK
 125
 126 /* command.com does not understand `...` so we define this.  */
 127 #define LIB_GCC -Lgcc
 128 #define SEPCHAR ';'
 129
 130 #define NULL_DEVICE "nul"
 131
 132 #if __DJGPP__ < 2
 133 #define O_RDONLY        0x0001
 134 #define O_WRONLY        0x0002
 135 #define O_RDWR          0x0004
 136 #define O_CREAT         0x0100
 137 #define O_TRUNC         0x0200
 138 #define O_EXCL          0x0400
 139 #define O_APPEND        0x0800
 140 #define O_TEXT          0x4000
 141 #define O_BINARY        0x8000
 142 #define NO_MATHERR
 143 #endif
 144
 145 #define HAVE_INVERSE_HYPERBOLIC
 146 #define FLOAT_CHECK_DOMAIN
 147
 148 /* When $TERM is "internal" then this is substituted:  */
 149 #define INTERNAL_TERMINAL "pc|bios|IBM PC with color display:\
 150 :co#80:li#25:Co#16:pa#256:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:\
 151 :se=</SO>:so=<SO>:us=<UL>:ue=</UL>:md=<BD>:mh=<DIM>:mb=<BL>:mr=<RV>:me=<NV>:\
 152 :AB=<BG %d>:AF=<FG %d>:op=<DefC>:"
 153
 154 /* Define this to a function (Fdowncase, Fupcase) if your file system
 155    likes that */
 156 #define FILE_SYSTEM_CASE Fmsdos_downcase_filename
 157
 158 /* Define this to be the separator between devices and paths */
 159 #define DEVICE_SEP ':'
 160
 161 /* We'll support either convention on MSDOG.  */
 162 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
 163 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
 164
 165 /* Call init_gettimeofday when TZ changes.  */
 166 #if __DJGPP__ < 2
 167 #define LOCALTIME_CACHE
 168 #define tzset init_gettimeofday
 169 #endif
 170
 171 /* bcopy under djgpp is quite safe */
 172 #define GAP_USE_BCOPY
 173 #define BCOPY_UPWARD_SAFE 1
 174 #define BCOPY_DOWNWARD_SAFE 1
 175
 176 /* Mode line description of a buffer's type.  */
 177 #define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
 178
 179 /* Do we have POSIX signals?  */
 180 #if __DJGPP__ > 1
 181 #define POSIX_SIGNALS
 182 #endif
 183
 184 /* We have (the code to control) a mouse.  */
 185 #define HAVE_MOUSE
 186
 187 /* We canuse mouse menus.  */
 188 #define HAVE_MENUS
 189
 190 /* Define one of these for easier conditionals.  */
 191 #ifdef HAVE_X_WINDOWS
 192 /* We need a little extra space, see ../../lisp/loadup.el */
 193 #define SYSTEM_PURESIZE_EXTRA 15000
 194 #define LIBX11_SYSTEM -lxext -lsys
 195 #else
 196 /* We need a little extra space, see ../../lisp/loadup.el */
 197 #define SYSTEM_PURESIZE_EXTRA 50000
 198 #endif
 199
 200 /* Tell the garbage collector that setjmp is known to save all
 201    registers relevant for conservative garbage collection in the
 202    jmp_buf.  */
 203
 204 #define GC_SETJMP_WORKS 1
 205 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 206
 207 /* arch-tag: d184f860-815d-4ff4-8187-d05c0f3c37d0
 208    (do not change this comment) */