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