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
  39 #define NEW_TTY_DRIVER
  40 #define HAVE_BSD_SIGNALS
  41 /* #define USE_XON_XOFF */
  42
  43 #if defined(__MSDOS__) || defined(_WIN32)
  44 #define NO_SYS_FILE
  45 #define SIGALRM 1234
  46 #undef NEW_TTY_DRIVER
  47 #undef HAVE_BSD_SIGNALS
  48 #define MINIMAL
  49 #endif
  50
  51 #if defined (__linux__)
  52 #  include <termcap.h>
  53 #endif /* __linux__ */
  54
  55 /* Some USG machines have BSD signal handling (sigblock, sigsetmask, etc.) */
  56 /* CYGNUS LOCAL accept __hpux as well as hpux for HP compiler in ANSI mode.  */
  57 #if defined (USG) && !(defined (hpux) || defined (__hpux))
  58 #  undef HAVE_BSD_SIGNALS
  59 #endif
  60
  61 #define ScreenCols() 80
  62 #define ScreenRows() 24
  63 #define ScreenSetCursor() abort();
  64 #define ScreenGetCursor() abort();
  65
  66 /* System V machines use termio. */
  67 #if !defined (_POSIX_VERSION)
  68 /* CYGNUS LOCAL accept __hpux as well as hpux for HP compiler in ANSI mode.
  69    Add __osf__ to list of machines to force use of termio.h */
  70 #  if defined (USG) || defined (hpux) || defined (__hpux) || defined (Xenix) || defined (sgi) || defined (DGUX) || defined (__osf__)
  71 #    undef NEW_TTY_DRIVER
  72 #    define TERMIO_TTY_DRIVER
  73 #    include <termio.h>
  74 #    if !defined (TCOON)
  75 #      define TCOON 1
  76 #    endif
  77 #  endif /* USG || hpux || Xenix || sgi || DUGX || __osf__ */
  78 #endif /* !_POSIX_VERSION */
  79
  80 /* Posix systems use termios and the Posix signal functions. */
  81 #if defined (_POSIX_VERSION)
  82 #  if !defined (TERMIOS_MISSING)
  83 #    undef NEW_TTY_DRIVER
  84 #    define TERMIOS_TTY_DRIVER
  85 #    include <termios.h>
  86 #  endif /* !TERMIOS_MISSING */
  87 #  define HAVE_POSIX_SIGNALS
  88 #  if !defined (O_NDELAY)
  89 #    define O_NDELAY O_NONBLOCK /* Posix-style non-blocking i/o */
  90 #  endif /* O_NDELAY */
  91 #endif /* _POSIX_VERSION */
  92
  93 /* System V.3 machines have the old 4.1 BSD `reliable' signal interface. */
  94 #if !defined (HAVE_BSD_SIGNALS) && !defined (HAVE_POSIX_SIGNALS)
  95 #  if defined (USGr3)
  96 #    if !defined (HAVE_USG_SIGHOLD)
  97 #      define HAVE_USG_SIGHOLD
  98 #    endif /* !HAVE_USG_SIGHOLD */
  99 #  endif /* USGr3 */
 100 #endif /* !HAVE_BSD_SIGNALS && !HAVE_POSIX_SIGNALS */
 101
 102 /* Other (BSD) machines use sgtty. */
 103 #if defined (NEW_TTY_DRIVER)
 104 #  include <sgtty.h>
 105 #endif
 106
 107 /* Define _POSIX_VDISABLE if we are not using the `new' tty driver and
 108    it is not already defined.  It is used both to determine if a
 109    special character is disabled and to disable certain special
 110    characters.  Posix systems should set to 0, USG systems to -1. */
 111 #if !defined (NEW_TTY_DRIVER) && !defined (_POSIX_VDISABLE)
 112 #  if defined (_POSIX_VERSION)
 113 #    define _POSIX_VDISABLE 0
 114 #  else /* !_POSIX_VERSION */
 115 #    define _POSIX_VDISABLE -1
 116 #  endif /* !_POSIX_VERSION */
 117 #endif /* !NEW_TTY_DRIVER && !_POSIX_VDISABLE */
 118
 119 #if 1
 120 #  define D_NAMLEN(d) strlen ((d)->d_name)
 121 #else /* !1 */
 122
 123 #if !defined (SHELL) && (defined (_POSIX_VERSION) || defined (USGr3))
 124 #  if !defined (HAVE_DIRENT_H)
 125 #    define HAVE_DIRENT_H
 126 #  endif /* !HAVE_DIRENT_H */
 127 #endif /* !SHELL && (_POSIX_VERSION || USGr3) */
 128
 129 #if defined (HAVE_DIRENT_H)
 130 #  include <dirent.h>
 131 #  if !defined (direct)
 132 #    define direct dirent
 133 #  endif /* !direct */
 134 #  define D_NAMLEN(d) strlen ((d)->d_name)
 135 #else /* !HAVE_DIRENT_H */
 136 #  define D_NAMLEN(d) ((d)->d_namlen)
 137 #  if defined (USG)
 138 #    if defined (Xenix)
 139 #      include <sys/ndir.h>
 140 #    else /* !Xenix (but USG...) */
 141 #      include "ndir.h"
 142 #    endif /* !Xenix */
 143 #  else /* !USG */
 144 #    include <sys/dir.h>
 145 #  endif /* !USG */
 146 #endif /* !HAVE_DIRENT_H */
 147 #endif /* !1 */
 148
 149 #if defined (USG) && defined (TIOCGWINSZ) && !defined (Linux)
 150 #  if defined (_AIX)
 151         /* AIX 4.x seems to reference struct uio within a prototype
 152            in stream.h, but doesn't cause the uio include file to
 153            be included.  */
 154 #    include <sys/uio.h>
 155 #  endif
 156 #  include <sys/stream.h>
 157 #  if defined (HAVE_SYS_PTEM_H)
 158 #    include <sys/ptem.h>
 159 #  endif /* HAVE_SYS_PTEM_H */
 160 #  if defined (HAVE_SYS_PTE_H)
 161 #    include <sys/pte.h>
 162 #  endif /* HAVE_SYS_PTE_H */
 163 #endif /* USG && TIOCGWINSZ && !Linux */
 164
 165 /* Posix macro to check file in statbuf for directory-ness.
 166    This requires that <sys/stat.h> be included before this test. */
 167 #if defined (S_IFDIR) && !defined (S_ISDIR)
 168 #define S_ISDIR(m) (((m)&S_IFMT) == S_IFDIR)
 169 #endif
 170 /* Posix macro to check file in statbuf for file-ness.
 171    This requires that <sys/stat.h> be included before this test. */
 172 #if defined (S_IFREG) && !defined (S_ISREG)
 173 #define S_ISREG(m) (((m)&S_IFMT) == S_IFREG)
 174 #endif
 175
 176 #if !defined (strchr) && !defined (__STDC__)
 177 extern char *strchr (), *strrchr ();
 178 #endif /* !strchr && !__STDC__ */
 179
 180 #if defined (HAVE_VARARGS_H)
 181 #  include <varargs.h>
 182 #endif /* HAVE_VARARGS_H */
 183
 184 /* This definition is needed by readline.c, rltty.c, and signals.c. */
 185 /* If on, then readline handles signals in a way that doesn't screw. */
 186 #define HANDLE_SIGNALS
 187
 188 #if defined(_WIN32) || defined(__MSDOS__)
 189 #undef HANDLE_SIGNALS
 190 #endif
 191
 192
 193 #if !defined (emacs_mode)
 194 #  define no_mode -1
 195 #  define vi_mode 0
 196 #  define emacs_mode 1
 197 #endif
 198
 199 /* Define some macros for dealing with assorted signalling disciplines.
 200
 201    These macros provide a way to use signal blocking and disabling
 202    without smothering your code in a pile of #ifdef's.
 203
 204    SIGNALS_UNBLOCK;                     Stop blocking all signals.
 205
 206    {
 207      SIGNALS_DECLARE_SAVED (name);      Declare a variable to save the
 208                                         signal blocking state.
 209         ...
 210      SIGNALS_BLOCK (SIGSTOP, name);     Block a signal, and save the previous
 211                                         state for restoration later.
 212         ...
 213      SIGNALS_RESTORE (name);            Restore previous signals.
 214    }
 215
 216 */
 217
 218 #ifdef HAVE_POSIX_SIGNALS
 219                                                         /* POSIX signals */
 220
 221 #define SIGNALS_UNBLOCK \
 222       do { sigset_t set;        \
 223         sigemptyset (&set);     \
 224         sigprocmask (SIG_SETMASK, &set, (sigset_t *)NULL);      \
 225       } while (0)
 226
 227 #define SIGNALS_DECLARE_SAVED(name)     sigset_t name
 228
 229 #define SIGNALS_BLOCK(SIG, saved)       \
 230         do { sigset_t set;              \
 231           sigemptyset (&set);           \
 232           sigaddset (&set, SIG);        \
 233           sigprocmask (SIG_BLOCK, &set, &saved);        \
 234         } while (0)
 235
 236 #define SIGNALS_RESTORE(saved)          \
 237   sigprocmask (SIG_SETMASK, &saved, (sigset_t *)NULL)
 238
 239
 240 #else   /* HAVE_POSIX_SIGNALS */
 241 #ifdef HAVE_BSD_SIGNALS
 242                                                         /* BSD signals */
 243
 244 #define SIGNALS_UNBLOCK                 sigsetmask (0)
 245 #define SIGNALS_DECLARE_SAVED(name)     int name
 246 #define SIGNALS_BLOCK(SIG, saved)       saved = sigblock (sigmask (SIG))
 247 #define SIGNALS_RESTORE(saved)          sigsetmask (saved)
 248
 249
 250 #else  /* HAVE_BSD_SIGNALS */
 251                                                         /* None of the Above */
 252
 253 #define SIGNALS_UNBLOCK                 /* nothing */
 254 #define SIGNALS_DECLARE_SAVED(name)     /* nothing */
 255 #define SIGNALS_BLOCK(SIG, saved)       /* nothing */
 256 #define SIGNALS_RESTORE(saved)          /* nothing */
 257
 258
 259 #endif /* HAVE_BSD_SIGNALS */
 260 #endif /* HAVE_POSIX_SIGNALS */
 261
 262 #if !defined (strchr)
 263 extern char *strchr ();
 264 #endif
 265 #if !defined (strrchr)
 266 extern char *strrchr ();
 267 #endif
 268 #ifdef __STDC__
 269 #include <stddef.h>
 270 extern size_t strlen (const char *s);
 271 #endif  /* __STDC__ */
 272
 273 /*  End of signal handling definitions.  */
 274 #endif /* !_RLDEFS_H */