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 /* CYGNUS LOCAL accept __hpux as well as hpux for HP compiler in ANSI mode.  */
  53 #if defined (USG) && !(defined (hpux) || defined (__hpux))
  54 #  undef HAVE_BSD_SIGNALS
  55 #endif
  56
  57 /* System V machines use termio. */
  58 #if !defined (_POSIX_VERSION)
  59 /* CYGNUS LOCAL accept __hpux as well as hpux for HP compiler in ANSI mode.  */
  60 #  if defined (USG) || defined (hpux) || defined (__hpux) || defined (Xenix) || defined (sgi) || defined (DGUX)
  61 #    undef NEW_TTY_DRIVER
  62 #    define TERMIO_TTY_DRIVER
  63 #    include <termio.h>
  64 #    if !defined (TCOON)
  65 #      define TCOON 1
  66 #    endif
  67 #  endif /* USG || hpux || Xenix || sgi || DUGX */
  68 #endif /* !_POSIX_VERSION */
  69
  70 /* Posix systems use termios and the Posix signal functions. */
  71 #if defined (_POSIX_VERSION)
  72 #  if !defined (TERMIOS_MISSING)
  73 #    undef NEW_TTY_DRIVER
  74 #    define TERMIOS_TTY_DRIVER
  75 #    include <termios.h>
  76 #  endif /* !TERMIOS_MISSING */
  77 #  define HAVE_POSIX_SIGNALS
  78 #  if !defined (O_NDELAY)
  79 #    define O_NDELAY O_NONBLOCK /* Posix-style non-blocking i/o */
  80 #  endif /* O_NDELAY */
  81 #endif /* _POSIX_VERSION */
  82
  83 /* System V.3 machines have the old 4.1 BSD `reliable' signal interface. */
  84 #if !defined (HAVE_BSD_SIGNALS) && !defined (HAVE_POSIX_SIGNALS)
  85 #  if defined (USGr3)
  86 #    if !defined (HAVE_USG_SIGHOLD)
  87 #      define HAVE_USG_SIGHOLD
  88 #    endif /* !HAVE_USG_SIGHOLD */
  89 #  endif /* USGr3 */
  90 #endif /* !HAVE_BSD_SIGNALS && !HAVE_POSIX_SIGNALS */
  91
  92 /* Other (BSD) machines use sgtty. */
  93 #if defined (NEW_TTY_DRIVER)
  94 #  include <sgtty.h>
  95 #endif
  96
  97 /* Define _POSIX_VDISABLE if we are not using the `new' tty driver and
  98    it is not already defined.  It is used both to determine if a
  99    special character is disabled and to disable certain special
 100    characters.  Posix systems should set to 0, USG systems to -1. */
 101 #if !defined (NEW_TTY_DRIVER) && !defined (_POSIX_VDISABLE)
 102 #  if defined (_POSIX_VERSION)
 103 #    define _POSIX_VDISABLE 0
 104 #  else /* !_POSIX_VERSION */
 105 #    define _POSIX_VDISABLE -1
 106 #  endif /* !_POSIX_VERSION */
 107 #endif /* !NEW_TTY_DRIVER && !_POSIX_VDISABLE */
 108
 109 #if 1
 110 #  define D_NAMLEN(d) strlen ((d)->d_name)
 111 #else /* !1 */
 112
 113 #if !defined (SHELL) && (defined (_POSIX_VERSION) || defined (USGr3))
 114 #  if !defined (HAVE_DIRENT_H)
 115 #    define HAVE_DIRENT_H
 116 #  endif /* !HAVE_DIRENT_H */
 117 #endif /* !SHELL && (_POSIX_VERSION || USGr3) */
 118
 119 #if defined (HAVE_DIRENT_H)
 120 #  include <dirent.h>
 121 #  if !defined (direct)
 122 #    define direct dirent
 123 #  endif /* !direct */
 124 #  define D_NAMLEN(d) strlen ((d)->d_name)
 125 #else /* !HAVE_DIRENT_H */
 126 #  define D_NAMLEN(d) ((d)->d_namlen)
 127 #  if defined (USG)
 128 #    if defined (Xenix)
 129 #      include <sys/ndir.h>
 130 #    else /* !Xenix (but USG...) */
 131 #      include "ndir.h"
 132 #    endif /* !Xenix */
 133 #  else /* !USG */
 134 #    include <sys/dir.h>
 135 #  endif /* !USG */
 136 #endif /* !HAVE_DIRENT_H */
 137 #endif /* !1 */
 138
 139 #if defined (USG) && defined (TIOCGWINSZ) && !defined (Linux)
 140 #  include <sys/stream.h>
 141 #  if defined (HAVE_SYS_PTEM_H)
 142 #    include <sys/ptem.h>
 143 #  endif /* HAVE_SYS_PTEM_H */
 144 #  if defined (HAVE_SYS_PTE_H)
 145 #    include <sys/pte.h>
 146 #  endif /* HAVE_SYS_PTE_H */
 147 #endif /* USG && TIOCGWINSZ && !Linux */
 148
 149 /* Posix macro to check file in statbuf for directory-ness.
 150    This requires that <sys/stat.h> be included before this test. */
 151 #if defined (S_IFDIR) && !defined (S_ISDIR)
 152 #define S_ISDIR(m) (((m)&S_IFMT) == S_IFDIR)
 153 #endif
 154
 155 #if !defined (strchr) && !defined (__STDC__)
 156 extern char *strchr (), *strrchr ();
 157 #endif /* !strchr && !__STDC__ */
 158
 159 #if defined (HAVE_VARARGS_H)
 160 #  include <varargs.h>
 161 #endif /* HAVE_VARARGS_H */
 162
 163 /* This definition is needed by readline.c, rltty.c, and signals.c. */
 164 /* If on, then readline handles signals in a way that doesn't screw. */
 165 #define HANDLE_SIGNALS
 166
 167 #if !defined (emacs_mode)
 168 #  define no_mode -1
 169 #  define vi_mode 0
 170 #  define emacs_mode 1
 171 #endif
 172
 173 /* Define some macros for dealing with assorted signalling disciplines.
 174
 175    These macros provide a way to use signal blocking and disabling
 176    without smothering your code in a pile of #ifdef's.
 177
 178    SIGNALS_UNBLOCK;                     Stop blocking all signals.
 179
 180    {
 181      SIGNALS_DECLARE_SAVED (name);      Declare a variable to save the
 182                                         signal blocking state.
 183         ...
 184      SIGNALS_BLOCK (SIGSTOP, name);     Block a signal, and save the previous
 185                                         state for restoration later.
 186         ...
 187      SIGNALS_RESTORE (name);            Restore previous signals.
 188    }
 189
 190 */
 191
 192 #ifdef HAVE_POSIX_SIGNALS
 193                                                         /* POSIX signals */
 194
 195 #define SIGNALS_UNBLOCK \
 196       do { sigset_t set;        \
 197         sigemptyset (&set);     \
 198         sigprocmask (SIG_SETMASK, &set, (sigset_t *)NULL);      \
 199       } while (0)
 200
 201 #define SIGNALS_DECLARE_SAVED(name)     sigset_t name
 202
 203 #define SIGNALS_BLOCK(SIG, saved)       \
 204         do { sigset_t set;              \
 205           sigemptyset (&set);           \
 206           sigaddset (&set, SIG);        \
 207           sigprocmask (SIG_BLOCK, &set, &saved);        \
 208         } while (0)
 209
 210 #define SIGNALS_RESTORE(saved)          \
 211   sigprocmask (SIG_SETMASK, &saved, (sigset_t *)NULL)
 212
 213
 214 #else   /* HAVE_POSIX_SIGNALS */
 215 #ifdef HAVE_BSD_SIGNALS
 216                                                         /* BSD signals */
 217
 218 #define SIGNALS_UNBLOCK                 sigsetmask (0)
 219 #define SIGNALS_DECLARE_SAVED(name)     int name
 220 #define SIGNALS_BLOCK(SIG, saved)       saved = sigblock (sigmask (SIG))
 221 #define SIGNALS_RESTORE(saved)          sigsetmask (saved)
 222
 223
 224 #else  /* HAVE_BSD_SIGNALS */
 225                                                         /* None of the Above */
 226
 227 #define SIGNALS_UNBLOCK                 /* nothing */
 228 #define SIGNALS_DECLARE_SAVED(name)     /* nothing */
 229 #define SIGNALS_BLOCK(SIG, saved)       /* nothing */
 230 #define SIGNALS_RESTORE(saved)          /* nothing */
 231
 232
 233 #endif /* HAVE_BSD_SIGNALS */
 234 #endif /* HAVE_POSIX_SIGNALS */
 235
 236 /*  End of signal handling definitions.  */
 237 #endif /* !_RLDEFS_H */