readline/rldefs.h

   1 /* rldefs.h -- an attempt to isolate some of the system-specific defines
   2    for readline.  This should be included after any files that define
   3    system-specific constants like _POSIX_VERSION or USG. */
   4
   5 /* Copyright (C) 1987,1989 Free Software Foundation, Inc.
   6
   7    This file contains the Readline Library (the Library), a set of
   8    routines for providing Emacs style line input to programs that ask
   9    for it.
  10
  11    The Library is free software; you can redistribute it and/or modify
  12    it under the terms of the GNU General Public License as published by
  13    the Free Software Foundation; either version 1, or (at your option)
  14    any later version.
  15
  16    The Library is distributed in the hope that it will be useful, but
  17    WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    General Public License for more details.
  20
  21    The GNU General Public License is often shipped with GNU software, and
  22    is generally kept in a file called COPYING or LICENSE.  If you do not
  23    have a copy of the license, write to the Free Software Foundation,
  24    675 Mass Ave, Cambridge, MA 02139, USA. */
  25
  26 #if !defined (_RLDEFS_H)
  27 #define _RLDEFS_H
  28
  29 #if defined (__GNUC__)
  30 #  undef alloca
  31 #  define alloca __builtin_alloca
  32 #else
  33 #  if defined (sparc) || defined (HAVE_ALLOCA_H)
  34 #    include <alloca.h>
  35 #  endif
  36 #endif
  37
  38 #define NEW_TTY_DRIVER
  39 #define HAVE_BSD_SIGNALS
  40 /* #define USE_XON_XOFF */
  41
  42 #ifdef __MSDOS__
  43 #undef NEW_TTY_DRIVER
  44 #undef HAVE_BSD_SIGNALS
  45 #endif
  46
  47 #if defined (__linux__)
  48 #  include <termcap.h>
  49 #endif /* __linux__ */
  50
  51 /* Some USG machines have BSD signal handling (sigblock, sigsetmask, etc.) */
  52 #if defined (USG) && !defined (hpux)
  53 #  undef HAVE_BSD_SIGNALS
  54 #endif
  55
  56 /* System V machines use termio. */
  57 #if !defined (_POSIX_VERSION)
  58 #  if defined (USG) || defined (hpux) || defined (Xenix) || defined (sgi) || defined (DGUX)
  59 #    undef NEW_TTY_DRIVER
  60 #    define TERMIO_TTY_DRIVER
  61 #    include <termio.h>
  62 #    if !defined (TCOON)
  63 #      define TCOON 1
  64 #    endif
  65 #  endif /* USG || hpux || Xenix || sgi || DUGX */
  66 #endif /* !_POSIX_VERSION */
  67
  68 /* Posix systems use termios and the Posix signal functions. */
  69 #if defined (_POSIX_VERSION)
  70 #  if !defined (TERMIOS_MISSING)
  71 #    undef NEW_TTY_DRIVER
  72 #    define TERMIOS_TTY_DRIVER
  73 #    include <termios.h>
  74 #  endif /* !TERMIOS_MISSING */
  75 #  define HAVE_POSIX_SIGNALS
  76 #  if !defined (O_NDELAY)
  77 #    define O_NDELAY O_NONBLOCK /* Posix-style non-blocking i/o */
  78 #  endif /* O_NDELAY */
  79 #endif /* _POSIX_VERSION */
  80
  81 /* System V.3 machines have the old 4.1 BSD `reliable' signal interface. */
  82 #if !defined (HAVE_BSD_SIGNALS) && !defined (HAVE_POSIX_SIGNALS)
  83 #  if defined (USGr3)
  84 #    if !defined (HAVE_USG_SIGHOLD)
  85 #      define HAVE_USG_SIGHOLD
  86 #    endif /* !HAVE_USG_SIGHOLD */
  87 #  endif /* USGr3 */
  88 #endif /* !HAVE_BSD_SIGNALS && !HAVE_POSIX_SIGNALS */
  89
  90 /* Other (BSD) machines use sgtty. */
  91 #if defined (NEW_TTY_DRIVER)
  92 #  include <sgtty.h>
  93 #endif
  94
  95 /* Define _POSIX_VDISABLE if we are not using the `new' tty driver and
  96    it is not already defined.  It is used both to determine if a
  97    special character is disabled and to disable certain special
  98    characters.  Posix systems should set to 0, USG systems to -1. */
  99 #if !defined (NEW_TTY_DRIVER) && !defined (_POSIX_VDISABLE)
 100 #  if defined (_POSIX_VERSION)
 101 #    define _POSIX_VDISABLE 0
 102 #  else /* !_POSIX_VERSION */
 103 #    define _POSIX_VDISABLE -1
 104 #  endif /* !_POSIX_VERSION */
 105 #endif /* !NEW_TTY_DRIVER && !_POSIX_VDISABLE */
 106
 107 #if 1
 108 #  define D_NAMLEN(d) strlen ((d)->d_name)
 109 #else /* !1 */
 110
 111 #if !defined (SHELL) && (defined (_POSIX_VERSION) || defined (USGr3))
 112 #  if !defined (HAVE_DIRENT_H)
 113 #    define HAVE_DIRENT_H
 114 #  endif /* !HAVE_DIRENT_H */
 115 #endif /* !SHELL && (_POSIX_VERSION || USGr3) */
 116
 117 #if defined (HAVE_DIRENT_H)
 118 #  include <dirent.h>
 119 #  if !defined (direct)
 120 #    define direct dirent
 121 #  endif /* !direct */
 122 #  define D_NAMLEN(d) strlen ((d)->d_name)
 123 #else /* !HAVE_DIRENT_H */
 124 #  define D_NAMLEN(d) ((d)->d_namlen)
 125 #  if defined (USG)
 126 #    if defined (Xenix)
 127 #      include <sys/ndir.h>
 128 #    else /* !Xenix (but USG...) */
 129 #      include "ndir.h"
 130 #    endif /* !Xenix */
 131 #  else /* !USG */
 132 #    include <sys/dir.h>
 133 #  endif /* !USG */
 134 #endif /* !HAVE_DIRENT_H */
 135 #endif /* !1 */
 136
 137 #if defined (USG) && defined (TIOCGWINSZ) && !defined (Linux)
 138 #  include <sys/stream.h>
 139 #  if defined (HAVE_SYS_PTEM_H)
 140 #    include <sys/ptem.h>
 141 #  endif /* HAVE_SYS_PTEM_H */
 142 #  if defined (HAVE_SYS_PTE_H)
 143 #    include <sys/pte.h>
 144 #  endif /* HAVE_SYS_PTE_H */
 145 #endif /* USG && TIOCGWINSZ && !Linux */
 146
 147 /* Posix macro to check file in statbuf for directory-ness.
 148    This requires that <sys/stat.h> be included before this test. */
 149 #if defined (S_IFDIR) && !defined (S_ISDIR)
 150 #define S_ISDIR(m) (((m)&S_IFMT) == S_IFDIR)
 151 #endif
 152
 153 /* Decide which flavor of the header file describing the C library
 154    string functions to include and include it. */
 155
 156 #if defined (USG) || defined (NeXT)
 157 #  if !defined (HAVE_STRING_H)
 158 #    define HAVE_STRING_H
 159 #  endif /* !HAVE_STRING_H */
 160 #endif /* USG || NeXT */
 161
 162 #if defined (HAVE_STRING_H)
 163 #  include <string.h>
 164 #else /* !HAVE_STRING_H */
 165 #  include <strings.h>
 166 #endif /* !HAVE_STRING_H */
 167
 168 #if !defined (strchr) && !defined (__STDC__)
 169 extern char *strchr (), *strrchr ();
 170 #endif /* !strchr && !__STDC__ */
 171
 172 #if defined (HAVE_VARARGS_H)
 173 #  include <varargs.h>
 174 #endif /* HAVE_VARARGS_H */
 175
 176 /* This definition is needed by readline.c, rltty.c, and signals.c. */
 177 /* If on, then readline handles signals in a way that doesn't screw. */
 178 #define HANDLE_SIGNALS
 179
 180 #if !defined (emacs_mode)
 181 #  define no_mode -1
 182 #  define vi_mode 0
 183 #  define emacs_mode 1
 184 #endif
 185
 186 /* Define some macros for dealing with assorted signalling disciplines.
 187
 188    These macros provide a way to use signal blocking and disabling
 189    without smothering your code in a pile of #ifdef's.
 190
 191    SIGNALS_UNBLOCK;                     Stop blocking all signals.
 192
 193    {
 194      SIGNALS_DECLARE_SAVED (name);      Declare a variable to save the
 195                                         signal blocking state.
 196         ...
 197      SIGNALS_BLOCK (SIGSTOP, name);     Block a signal, and save the previous
 198                                         state for restoration later.
 199         ...
 200      SIGNALS_RESTORE (name);            Restore previous signals.
 201    }
 202
 203 */
 204
 205 #ifdef HAVE_POSIX_SIGNALS
 206                                                         /* POSIX signals */
 207
 208 #define SIGNALS_UNBLOCK \
 209       do { sigset_t set;        \
 210         sigemptyset (&set);     \
 211         sigprocmask (SIG_SETMASK, &set, (sigset_t *)NULL);      \
 212       } while (0)
 213
 214 #define SIGNALS_DECLARE_SAVED(name)     sigset_t name
 215
 216 #define SIGNALS_BLOCK(SIG, saved)       \
 217         do { sigset_t set;              \
 218           sigemptyset (&set);           \
 219           sigaddset (&set, SIG);        \
 220           sigprocmask (SIG_BLOCK, &set, &saved);        \
 221         } while (0)
 222
 223 #define SIGNALS_RESTORE(saved)          \
 224   sigprocmask (SIG_SETMASK, &saved, (sigset_t *)NULL)
 225
 226
 227 #else   /* HAVE_POSIX_SIGNALS */
 228 #ifdef HAVE_BSD_SIGNALS
 229                                                         /* BSD signals */
 230
 231 #define SIGNALS_UNBLOCK                 sigsetmask (0)
 232 #define SIGNALS_DECLARE_SAVED(name)     int name
 233 #define SIGNALS_BLOCK(SIG, saved)       saved = sigblock (sigmask (SIG))
 234 #define SIGNALS_RESTORE(saved)          sigsetmask (saved)
 235
 236
 237 #else  /* HAVE_BSD_SIGNALS */
 238                                                         /* None of the Above */
 239
 240 #define SIGNALS_UNBLOCK                 /* nothing */
 241 #define SIGNALS_DECLARE_SAVED(name)     /* nothing */
 242 #define SIGNALS_BLOCK(SIG, saved)       /* nothing */
 243 #define SIGNALS_RESTORE(saved)          /* nothing */
 244
 245
 246 #endif /* HAVE_BSD_SIGNALS */
 247 #endif /* HAVE_POSIX_SIGNALS */
 248
 249 /*  End of signal handling definitions.  */
 250 #endif /* !_RLDEFS_H */