src/s/vms.h

   1 /* system description header for VMS
   2    Copyright (C) 1986, 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Emacs.
   5
   6 GNU Emacs is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Emacs is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Emacs; see the file COPYING.  If not, write to
  18 the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19 Boston, MA 02110-1301, USA.  */
  20
  21 /*
  22  *      Define symbols to identify the version of Unix this is.
  23  *      Define all the symbols that apply correctly.
  24  */
  25
  26 #ifndef VMS                 /* Decus cpp doesn't define this but VAX C does */
  27 #define VMS
  28 #endif /* VMS */
  29 /* Note that this file is used indirectly via vms4-0.h, or some other
  30    such file.  These other files define a symbol VMS4_0, VMS4_2, etc.  */
  31
  32 /* SYSTEM_TYPE should indicate the kind of system you are using.
  33  It sets the Lisp variable system-type.  */
  34
  35 #define SYSTEM_TYPE "vax-vms"
  36
  37 /* NOMULTIPLEJOBS should be defined if your system's shell
  38  does not have "job control" (the ability to stop a program,
  39  run some other program, then continue the first one).  */
  40
  41 /* #define NOMULTIPLEJOBS */
  42
  43 /* INTERRUPT_INPUT controls a default for Unix systems.
  44    VMS uses a separate mechanism.  */
  45
  46 /* #define INTERRUPT_INPUT */
  47
  48 /* Letter to use in finding device name of first pty,
  49   if system supports pty's.  'a' means it is /dev/ptya0  */
  50
  51 #define FIRST_PTY_LETTER 'a'
  52
  53 /*
  54  *      Define HAVE_PTYS if the system supports pty devices.
  55  */
  56
  57 /* #define HAVE_PTYS */
  58
  59 /* Define HAVE_SOCKETS if system supports 4.2-compatible sockets.  */
  60
  61 /* #define HAVE_SOCKETS */
  62
  63 /*
  64  *      Define NONSYSTEM_DIR_LIBRARY to make Emacs emulate
  65  *      The 4.2 opendir, etc., library functions.
  66  */
  67
  68 #define NONSYSTEM_DIR_LIBRARY
  69
  70 /* Define this symbol if your system has the functions bcopy, etc. */
  71
  72 /* #define BSTRING */
  73
  74 /* subprocesses should be defined if you want to
  75    have code for asynchronous subprocesses
  76    (as used in M-x compile and M-x shell).
  77    This is generally OS dependent, and not supported
  78    under most USG systems. */
  79
  80 #define subprocesses
  81
  82 /* If your system uses COFF (Common Object File Format) then define the
  83    preprocessor symbol "COFF". */
  84
  85 /* #define COFF */
  86
  87 /* define MAIL_USE_FLOCK if the mailer uses flock
  88    to interlock access to /usr/spool/mail/$USER.
  89    The alternative is that a lock file named
  90    /usr/spool/mail/$USER.lock.  */
  91
  92 /* #define MAIL_USE_FLOCK */
  93
  94 /* Define CLASH_DETECTION if you want lock files to be written
  95    so that Emacs can tell instantly when you try to modify
  96    a file that someone else has modified in his Emacs.  */
  97
  98 /* #define CLASH_DETECTION */
  99
 100 /* Define the maximum record length for print strings, if needed. */
 101
 102 #define MAX_PRINT_CHARS 300
 103
 104 \f
 105 /* Here, on a separate page, add any special hacks needed
 106    to make Emacs work on this system.  For example,
 107    you might define certain system call names that don't
 108    exist on your system, or that do different things on
 109    your system and must be used only through an encapsulation
 110    (Which you should place, by convention, in sysdep.c).  */
 111
 112 /* In olden days, VMS filenames did not support hyphen (i.e., the "-"
 113    character).  You can #undef this in vmsX-Y.h for newer versions.  */
 114
 115 #define NO_HYPHENS_IN_FILENAMES
 116
 117 /* Do you have the sharable library bug?  If you link with a sharable
 118    library that contains psects with the NOSHR attribute and also refer to
 119    those psects in your program, the linker give you a private version of
 120    the psect which is not related to the version used by the sharable
 121    library.  The end result is that your references to variables in that
 122    psect have absolutely nothing to do with library references to what is
 123    supposed to be the same variable.  If you intend to link with the standard
 124    C library (NOT the sharable one) you don't need to define this.  (This
 125    is NOT fixed in V4.4...) */
 126
 127 #define SHARABLE_LIB_BUG
 128
 129 /* Partially due to the above mentioned bug and also so that we don't need
 130    to require that people have a sharable C library, the default for Emacs
 131    is to link with the non-shared library.  If you want to link with the
 132    shared library, define this and remake xmakefile and fileio.c. This allows
 133    us to ship a guaranteed executable image. */
 134
 135 #define LINK_CRTL_SHARE
 136
 137 /* Define this if you want to read the file SYS$SYSTEM:SYSUAF.DAT for user
 138    information.  If you do use this, you must either make SYSUAF.DAT world
 139    readable or install Emacs with SYSPRV.  */
 140
 141 /* #define READ_SYSUAF */
 142
 143 /* Traditionally, filenames on VMS are always upper case.  */
 144
 145 #define FILE_SYSTEM_CASE Fupcase
 146
 147 /* On VMS these have a different name */
 148
 149 #define index strchr
 150 #define rindex strrchr
 151 #define unlink delete
 152
 153 #ifndef _GNUC_
 154 extern double mth$dmod(double, double);
 155 #define drem mth$dmod
 156 #endif
 157
 158 /* Some time routines are missing in the VAX C RTL, or needs some
 159    extra bit of code */
 160 #define tzset sys_tzset
 161 #define localtime sys_localtime
 162 #define gmtime sys_gmtime
 163
 164 /* On later versions of VMS these exist in the C run time library, but
 165    we are using our own implementations.  Hide their names to avoid
 166    linker errors */
 167 #define rename sys_rename
 168 #define execvp sys_execvp
 169 #define system sys_system
 170
 171 #ifndef GNU_MALLOC
 172 /* Hide these names so that we don't get linker errors */
 173 #define malloc sys_malloc
 174 #define free sys_free
 175 #define realloc sys_realloc
 176 #define calloc sys_calloc
 177
 178 /* Don't use the standard brk and sbrk */
 179 #define sbrk sys_sbrk
 180 #define brk sys_brk
 181 #endif
 182
 183 /* On VMS we want to avoid reading and writing very large amounts of
 184    data at once, so we redefine read and write here. */
 185
 186 #define read sys_read
 187 #define write sys_write
 188
 189 /* sys_creat just calls the real creat with additional args of
 190    "rfm=var", "rat=cr" to get "normal" VMS files... */
 191 #define creat sys_creat
 192
 193 /* fwrite forces an RMS PUT on every call.  This is abysmally slow, so
 194    we emulate fwrite with fputc, which forces buffering and is much
 195    faster! */
 196 #define fwrite sys_fwrite
 197
 198 /* getuid only returns the member number, which is not unique on most VMS
 199    systems.  We emulate it with (getgid()<<16 | getuid()). */
 200 #define getuid sys_getuid
 201
 202 /* If user asks for TERM, check first for EMACS_TERM.  */
 203 #define getenv sys_getenv
 204
 205 /* Standard C abort is less useful than it should be. */
 206 #define abort sys_abort
 207
 208 /* Case conflicts with C library fread. */
 209 #define Fread F_read
 210
 211 /* Case conflicts with C library srandom. */
 212 #define Srandom S_random
 213
 214 /* variable length too long... maybe */
 215 #if 0
 216 #define do_line_insertion_deletion_costs do_line_insertion_deletion_cost
 217 #endif
 218
 219 /* Cause initialization of vmsfns.c to be run.  */
 220 #define SYMS_SYSTEM syms_of_vmsfns ()
 221
 222 /* VAXCRTL access doesn't deal with SYSPRV very well (among other oddities...)
 223    Here, we use $CHKPRO to really determine access. */
 224 #define access sys_access
 225
 226 #define PAGESIZE        512
 227
 228 #define _longjmp        longjmp
 229 #define _setjmp         setjmp
 230
 231 globalref char sdata[];
 232 #define DATA_START (((int) sdata + 511) & ~511)
 233 #define TEXT_START 512
 234
 235 /* Baud-rate values from tty status are not standard.  */
 236
 237 #define BAUD_CONVERT  \
 238 { 0, 50, 75, 110, 134, 150, 300, 600, 1200, 1800, \
 239   2000, 2400, 3600, 4800, 7200, 9600, 19200 }
 240
 241 #define PURESIZE 330000
 242
 243 /* Stdio FILE type has extra indirect on VMS, so must alter this macro.  */
 244
 245 #define PENDING_OUTPUT_COUNT(FILE) ((*(FILE))->_ptr - (*(FILE))->_base)
 246
 247 #define NULL_DEVICE "NLA0:"
 248
 249 #define TERMCAP_NAME "emacs_library:[etc]termcap.dat"
 250
 251 #define EXEC_SUFFIXES ".exe:.com"
 252
 253 /* Case conflict with Xlib XFree () */
 254 #define xfree emacs_xfree
 255
 256 /* What separator do we use in paths?  */
 257 #define SEPCHAR ','
 258
 259 /* arch-tag: 76bc2b70-46d1-4334-8f12-955c0d0ca6d4
 260    (do not change this comment) */