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code.delx.au - gnu-emacs/blob - src/s/msdos.h
1 /* System description file for MS-DOS
3 Copyright (C) 1993, 1996 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs; see the file COPYING. If not, write to
19 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
22 /* Note: lots of stuff here was taken from s-msdos.h in demacs. */
26 * Define symbols to identify the version of Unix this is.
27 * Define all the symbols that apply correctly.
46 #define __DJGPP__ 1 /* V2 defines __DJGPP__ == 2 */
49 You lose
; /* Emacs for DOS must be compiled with DJGPP */
52 #define DOS_NT /* MSDOS or WINDOWSNT */
56 /* SYSTEM_TYPE should indicate the kind of system you are using.
57 It sets the Lisp variable system-type. */
59 #define SYSTEM_TYPE "ms-dos"
61 #define SYMS_SYSTEM syms_of_dosfns();syms_of_msdos()
63 /* NOMULTIPLEJOBS should be defined if your system's shell
64 does not have "job control" (the ability to stop a program,
65 run some other program, then continue the first one). */
67 #define NOMULTIPLEJOBS
69 /* Emacs can read input using SIGIO and buffering characters itself,
70 or using CBREAK mode and making C-g cause SIGINT.
71 The choice is controlled by the variable interrupt_input.
72 Define INTERRUPT_INPUT to make interrupt_input = 1 the default (use SIGIO)
74 SIGIO can be used only on systems that implement it (4.2 and 4.3).
75 CBREAK mode has two disadvantages
76 1) At least in 4.2, it is impossible to handle the Meta key properly.
77 I hear that in system V this problem does not exist.
78 2) Control-G causes output to be discarded.
79 I do not know whether this can be fixed in system V.
81 Another method of doing input is planned but not implemented.
82 It would have Emacs fork off a separate process
83 to read the input and send it to the true Emacs process
87 /* #define INTERRUPT_INPUT */
89 /* Letter to use in finding device name of first pty,
90 if system supports pty's. 'a' means it is /dev/ptya0 */
92 /* #define FIRST_PTY_LETTER 'a' */
95 * Define HAVE_PTYS if the system supports pty devices.
98 /* #define HAVE_PTYS */
101 * Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
102 * The 4.2 opendir, etc., library functions.
105 /* #define NONSYSTEM_DIR_LIBRARY */
107 #define SYSV_SYSTEM_DIR
109 /* Define this symbol if your system has the functions bcopy, etc. */
113 /* Define this is the compiler understands `volatile'. */
114 #define HAVE_VOLATILE
117 /* subprocesses should be defined if you want to
118 have code for asynchronous subprocesses
119 (as used in M-x compile and M-x shell).
120 This is generally OS dependent, and not supported
121 under most USG systems. */
125 /* If your system uses COFF (Common Object File Format) then define the
126 preprocessor symbol "COFF". */
130 /* define MAIL_USE_FLOCK if the mailer uses flock
131 to interlock access to /usr/spool/mail/$USER.
132 The alternative is that a lock file named
133 /usr/spool/mail/$USER.lock. */
135 /* #define MAIL_USE_FLOCK */
137 /* Define CLASH_DETECTION if you want lock files to be written
138 so that Emacs can tell instantly when you try to modify
139 a file that someone else has modified in his Emacs. */
141 /* #define CLASH_DETECTION */
143 /* Here, on a separate page, add any special hacks needed
144 to make Emacs work on this system. For example,
145 you might define certain system call names that don't
146 exist on your system, or that do different things on
147 your system and must be used only through an encapsulation
148 (Which you should place, by convention, in sysdep.c). */
150 /* we use djgcc's malloc */
151 /* #define SYSTEM_MALLOC */
152 /* setjmp and longjmp can safely replace _setjmp and _longjmp,
153 but they will run slower. */
155 #define _setjmp setjmp
156 #define _longjmp longjmp
162 /* New chdir () routine.
163 DJGPP v2.0 and later doesn't need it because its chdir() does
164 set the drive itself. */
168 #define chdir sys_chdir
170 #define LIBS_SYSTEM -lpc /* isn't required in DJGPP v2.0, either */
172 #endif /* __DJGPP__ < 2 */
176 #define DATA_START (&etext + 1)
177 #define TEXT_START &start
178 #define TEXT_END &etext
180 #define _NAIVE_DOS_REGS
182 #else /* not __DJGPP__ > 1 */
184 /* This somehow needs to be defined even though we use COFF. */
185 #define TEXT_START -1
187 #endif /* not __DJGPP__ > 1 */
189 #define ORDINARY_LINK
191 /* command.com does not understand `...` so we define this. */
192 #define LIB_GCC -Lgcc
193 #define DONT_NEED_ENVIRON
196 #define NULL_DEVICE "nul"
197 #define EXEC_SUFFIXES ".exe:.com:.bat:"
200 #define O_RDONLY 0x0001
201 #define O_WRONLY 0x0002
202 #define O_RDWR 0x0004
203 #define O_CREAT 0x0100
204 #define O_TRUNC 0x0200
205 #define O_EXCL 0x0400
206 #define O_APPEND 0x0800
207 #define O_TEXT 0x4000
208 #define O_BINARY 0x8000
212 #define HAVE_INVERSE_HYPERBOLIC
213 #define FLOAT_CHECK_DOMAIN
215 /* When $TERM is "internal" then this is substituted: */
216 #define INTERNAL_TERMINAL "pc|bios|IBM PC with colour display:\
217 :co#80:li#25:km:ms:cm=<CM>:cl=<CL>:ce=<CE>:"
219 /* Define this to a function (Fdowncase, Fupcase) if your file system
221 #define FILE_SYSTEM_CASE Fdowncase
223 /* Define this to be the separator between devices and paths */
224 #define DEVICE_SEP ':'
226 /* We'll support either convention on MSDOG. */
227 #define IS_DIRECTORY_SEP(_c_) ((_c_) == '/' || (_c_) == '\\')
228 #define IS_ANY_SEP(_c_) (IS_DIRECTORY_SEP (_c_) || IS_DEVICE_SEP (_c_))
230 /* Call init_gettimeofday when TZ changes. */
232 #define LOCALTIME_CACHE
233 #define tzset init_gettimeofday
236 /* bcopy under djgpp is quite safe */
237 #define GAP_USE_BCOPY
238 #define BCOPY_UPWARD_SAFE 1
239 #define BCOPY_DOWNWARD_SAFE 1
241 /* Mode line description of a buffer's type. */
242 #define MODE_LINE_BINARY_TEXT(buf) (NILP(buf->buffer_file_type) ? "T" : "B")
244 /* Do we have POSIX signals? */
246 #define POSIX_SIGNALS
249 /* We have (the code to control) a mouse. */
252 /* We canuse mouse menus. */
255 /* We have support for faces. */
258 /* Define one of these for easier conditionals. */
259 #ifdef HAVE_X_WINDOWS
260 /* We need a little extra space, see ../../lisp/loadup.el */
261 #define SYSTEM_PURESIZE_EXTRA 15000
263 #define LIBX11_SYSTEM -lxext -lsys
265 /* We need a little extra space, see ../../lisp/loadup.el */
266 #define SYSTEM_PURESIZE_EXTRA 85000