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