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 #undef VMS
  44
  45 /* SYSTEM_TYPE should indicate the kind of system you are using.
  46  It sets the Lisp variable system-type.  */
  47
  48 #define SYSTEM_TYPE "ms-dos"
  49
  50 #define SYMS_SYSTEM syms_of_dosfns();syms_of_msdos();syms_of_win16select()
  51
  52 /* NOMULTIPLEJOBS should be defined if your system's shell
  53  does not have "job control" (the ability to stop a program,
  54  run some other program, then continue the first one).  */
  55
  56 #define NOMULTIPLEJOBS
  57
  58 #define SYSV_SYSTEM_DIR
  59
  60 /* Define this symbol if your system has the functions bcopy, etc. */
  61
  62 #define BSTRING
  63
  64 /* Define this is the compiler understands `volatile'.  */
  65 #define HAVE_VOLATILE
  66
  67
  68 /* subprocesses should be defined if you want to
  69    have code for asynchronous subprocesses
  70    (as used in M-x compile and M-x shell).
  71    This is generally OS dependent, and not supported
  72    under most USG systems. */
  73
  74 #undef subprocesses
  75
  76 /* If your system uses COFF (Common Object File Format) then define the
  77    preprocessor symbol "COFF". */
  78
  79 #define COFF
  80
  81 /* Here, on a separate page, add any special hacks needed
  82    to make Emacs work on this system.  For example,
  83    you might define certain system call names that don't
  84    exist on your system, or that do different things on
  85    your system and must be used only through an encapsulation
  86    (Which you should place, by convention, in sysdep.c).  */
  87 \f
  88 /* Avoid incompatibilities between gmalloc.c and system header files
  89    in how to declare valloc.  */
  90 #define GMALLOC_INHIBIT_VALLOC
  91
  92 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
  93    but they will run slower.  */
  94
  95 #define _setjmp setjmp
  96 #define _longjmp longjmp
  97
  98 #if __DJGPP__ < 2
  99
 100 /* New chdir () routine.
 101    DJGPP v2.0 and later doesn't need it because its chdir() does
 102    set the drive itself. */
 103 #ifdef chdir
 104 #undef chdir
 105 #endif
 106 #define chdir sys_chdir
 107
 108 #define LIBS_SYSTEM -lpc  /* isn't required in DJGPP v2.0, either */
 109
 110 #endif /* __DJGPP__ < 2 */
 111
 112 #if __DJGPP__ > 1
 113
 114 #define DATA_START  (&etext + 1)
 115 #define TEXT_START  &start
 116 #define TEXT_END    &etext
 117
 118 #define _NAIVE_DOS_REGS
 119
 120 #else /* not __DJGPP__ > 1 */
 121
 122 /* This somehow needs to be defined even though we use COFF.  */
 123 #define TEXT_START -1
 124
 125 #endif /* not __DJGPP__ > 1 */
 126
 127 #define ORDINARY_LINK
 128
 129 /* command.com does not understand `...` so we define this.  */
 130 #define LIB_GCC -Lgcc
 131 #define SEPCHAR ';'
 132
 133 #define NULL_DEVICE "nul"
 134
 135 #if __DJGPP__ < 2
 136 #define O_RDONLY        0x0001
 137 #define O_WRONLY        0x0002
 138 #define O_RDWR          0x0004
 139 #define O_CREAT         0x0100
 140 #define O_TRUNC         0x0200
 141 #define O_EXCL          0x0400
 142 #define O_APPEND        0x0800
 143 #define O_TEXT          0x4000
 144 #define O_BINARY        0x8000
 145 #define NO_MATHERR
 146 #endif
 147
 148 #define HAVE_INVERSE_HYPERBOLIC
 149 #define FLOAT_CHECK_DOMAIN
 150
 151 /* When $TERM is "internal" then this is substituted:  */
 152 #define INTERNAL_TERMINAL "pc|bios|IBM PC with color display:\
 153 :co#80:li#25:Co#16:pa#256:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:\
 154 :se=</SO>:so=<SO>:us=<UL>:ue=</UL>:md=<BD>:mh=<DIM>:mb=<BL>:mr=<RV>:me=<NV>:\
 155 :AB=<BG %d>:AF=<FG %d>:op=<DefC>:"
 156
 157 /* Define this to a function (Fdowncase, Fupcase) if your file system
 158    likes that */
 159 #define FILE_SYSTEM_CASE Fmsdos_downcase_filename
 160
 161 /* Define this to be the separator between devices and paths */
 162 #define DEVICE_SEP ':'
 163
 164 /* We'll support either convention on MSDOG.  */
 165 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
 166 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
 167
 168 /* Call init_gettimeofday when TZ changes.  */
 169 #if __DJGPP__ < 2
 170 #define LOCALTIME_CACHE
 171 #define tzset init_gettimeofday
 172 #endif
 173
 174 /* bcopy under djgpp is quite safe */
 175 #define GAP_USE_BCOPY
 176 #define BCOPY_UPWARD_SAFE 1
 177 #define BCOPY_DOWNWARD_SAFE 1
 178
 179 /* Mode line description of a buffer's type.  */
 180 #define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
 181
 182 /* Do we have POSIX signals?  */
 183 #if __DJGPP__ > 1
 184 #define POSIX_SIGNALS
 185 #endif
 186
 187 /* We have (the code to control) a mouse.  */
 188 #define HAVE_MOUSE
 189
 190 /* We canuse mouse menus.  */
 191 #define HAVE_MENUS
 192
 193 /* Define one of these for easier conditionals.  */
 194 #ifdef HAVE_X_WINDOWS
 195 /* We need a little extra space, see ../../lisp/loadup.el */
 196 #define SYSTEM_PURESIZE_EXTRA 15000
 197 #define LIBX11_SYSTEM -lxext -lsys
 198 #else
 199 /* We need a little extra space, see ../../lisp/loadup.el */
 200 #define SYSTEM_PURESIZE_EXTRA 50000
 201 #endif
 202
 203 /* Tell the garbage collector that setjmp is known to save all
 204    registers relevant for conservative garbage collection in the
 205    jmp_buf.  */
 206
 207 #define GC_SETJMP_WORKS 1
 208 #define GC_MARK_STACK GC_MAKE_GCPROS_NOOPS
 209
 210 /* arch-tag: d184f860-815d-4ff4-8187-d05c0f3c37d0
 211    (do not change this comment) */