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(_MSC_VER)
  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 #if defined (__WIN32__) && !defined(_MSC_VER)
  62 #undef NEW_TTY_DRIVER
  63 #define MINIMAL
  64 #undef HAVE_BSD_SIGNALS
  65 #define TERMIOS_TTY_DRIVER
  66 #undef HANDLE_SIGNALS
  67 #include <termios.h>
  68 /*#define HAVE_POSIX_SIGNALS*/
  69 #endif
  70
  71 /* System V machines use termio. */
  72 #if !defined (_POSIX_VERSION)
  73 /* CYGNUS LOCAL accept __hpux as well as hpux for HP compiler in ANSI mode.  */
  74 #  if defined (USG) || defined (hpux) || defined (__hpux) || defined (Xenix) || defined (sgi) || defined (DGUX)
  75 #    undef NEW_TTY_DRIVER
  76 #    define TERMIO_TTY_DRIVER
  77 #    include <termio.h>
  78 #    if !defined (TCOON)
  79 #      define TCOON 1
  80 #    endif
  81 #  endif /* USG || hpux || Xenix || sgi || DUGX */
  82 #endif /* !_POSIX_VERSION */
  83
  84 /* Posix systems use termios and the Posix signal functions. */
  85 #if defined (_POSIX_VERSION)
  86 #  if !defined (TERMIOS_MISSING)
  87 #    undef NEW_TTY_DRIVER
  88 #    define TERMIOS_TTY_DRIVER
  89 #    include <termios.h>
  90 #  endif /* !TERMIOS_MISSING */
  91 #  define HAVE_POSIX_SIGNALS
  92 #  if !defined (O_NDELAY)
  93 #    define O_NDELAY O_NONBLOCK /* Posix-style non-blocking i/o */
  94 #  endif /* O_NDELAY */
  95 #endif /* _POSIX_VERSION */
  96
  97 /* System V.3 machines have the old 4.1 BSD `reliable' signal interface. */
  98 #if !defined (HAVE_BSD_SIGNALS) && !defined (HAVE_POSIX_SIGNALS)
  99 #  if defined (USGr3)
 100 #    if !defined (HAVE_USG_SIGHOLD)
 101 #      define HAVE_USG_SIGHOLD
 102 #    endif /* !HAVE_USG_SIGHOLD */
 103 #  endif /* USGr3 */
 104 #endif /* !HAVE_BSD_SIGNALS && !HAVE_POSIX_SIGNALS */
 105
 106 /* Other (BSD) machines use sgtty. */
 107 #if defined (NEW_TTY_DRIVER)
 108 #  include <sgtty.h>
 109 #endif
 110
 111 /* Define _POSIX_VDISABLE if we are not using the `new' tty driver and
 112    it is not already defined.  It is used both to determine if a
 113    special character is disabled and to disable certain special
 114    characters.  Posix systems should set to 0, USG systems to -1. */
 115 #if !defined (NEW_TTY_DRIVER) && !defined (_POSIX_VDISABLE)
 116 #  if defined (_POSIX_VERSION)
 117 #    define _POSIX_VDISABLE 0
 118 #  else /* !_POSIX_VERSION */
 119 #    define _POSIX_VDISABLE -1
 120 #  endif /* !_POSIX_VERSION */
 121 #endif /* !NEW_TTY_DRIVER && !_POSIX_VDISABLE */
 122
 123 #if 1
 124 #  define D_NAMLEN(d) strlen ((d)->d_name)
 125 #else /* !1 */
 126
 127 #if !defined (SHELL) && (defined (_POSIX_VERSION) || defined (USGr3))
 128 #  if !defined (HAVE_DIRENT_H)
 129 #    define HAVE_DIRENT_H
 130 #  endif /* !HAVE_DIRENT_H */
 131 #endif /* !SHELL && (_POSIX_VERSION || USGr3) */
 132
 133 #if defined (HAVE_DIRENT_H)
 134 #  include <dirent.h>
 135 #  if !defined (direct)
 136 #    define direct dirent
 137 #  endif /* !direct */
 138 #  define D_NAMLEN(d) strlen ((d)->d_name)
 139 #else /* !HAVE_DIRENT_H */
 140 #  define D_NAMLEN(d) ((d)->d_namlen)
 141 #  if defined (USG)
 142 #    if defined (Xenix)
 143 #      include <sys/ndir.h>
 144 #    else /* !Xenix (but USG...) */
 145 #      include "ndir.h"
 146 #    endif /* !Xenix */
 147 #  else /* !USG */
 148 #    include <sys/dir.h>
 149 #  endif /* !USG */
 150 #endif /* !HAVE_DIRENT_H */
 151 #endif /* !1 */
 152
 153 #if defined (USG) && defined (TIOCGWINSZ) && !defined (Linux)
 154 #  if defined (_AIX)
 155         /* AIX 4.x seems to reference struct uio within a prototype
 156            in stream.h, but doesn't cause the uio include file to
 157            be included.  */
 158 #    include <sys/uio.h>
 159 #  endif
 160 #  include <sys/stream.h>
 161 #  if defined (HAVE_SYS_PTEM_H)
 162 #    include <sys/ptem.h>
 163 #  endif /* HAVE_SYS_PTEM_H */
 164 #  if defined (HAVE_SYS_PTE_H)
 165 #    include <sys/pte.h>
 166 #  endif /* HAVE_SYS_PTE_H */
 167 #endif /* USG && TIOCGWINSZ && !Linux */
 168
 169 /* Posix macro to check file in statbuf for directory-ness.
 170    This requires that <sys/stat.h> be included before this test. */
 171 #if defined (S_IFDIR) && !defined (S_ISDIR)
 172 #define S_ISDIR(m) (((m)&S_IFMT) == S_IFDIR)
 173 #endif
 174 /* Posix macro to check file in statbuf for file-ness.
 175    This requires that <sys/stat.h> be included before this test. */
 176 #if defined (S_IFREG) && !defined (S_ISREG)
 177 #define S_ISREG(m) (((m)&S_IFMT) == S_IFREG)
 178 #endif
 179
 180 #if !defined (strchr) && !defined (__STDC__)
 181 extern char *strchr (), *strrchr ();
 182 #endif /* !strchr && !__STDC__ */
 183
 184 #if defined (HAVE_VARARGS_H)
 185 #  include <varargs.h>
 186 #endif /* HAVE_VARARGS_H */
 187
 188 /* This definition is needed by readline.c, rltty.c, and signals.c. */
 189 /* If on, then readline handles signals in a way that doesn't screw. */
 190 #define HANDLE_SIGNALS
 191
 192 #if defined(__WIN32__) || defined(__MSDOS__)
 193 #undef HANDLE_SIGNALS
 194 #endif
 195
 196
 197 #if !defined (emacs_mode)
 198 #  define no_mode -1
 199 #  define vi_mode 0
 200 #  define emacs_mode 1
 201 #endif
 202
 203 /* Define some macros for dealing with assorted signalling disciplines.
 204
 205    These macros provide a way to use signal blocking and disabling
 206    without smothering your code in a pile of #ifdef's.
 207
 208    SIGNALS_UNBLOCK;                     Stop blocking all signals.
 209
 210    {
 211      SIGNALS_DECLARE_SAVED (name);      Declare a variable to save the
 212                                         signal blocking state.
 213         ...
 214      SIGNALS_BLOCK (SIGSTOP, name);     Block a signal, and save the previous
 215                                         state for restoration later.
 216         ...
 217      SIGNALS_RESTORE (name);            Restore previous signals.
 218    }
 219
 220 */
 221
 222 #ifdef HAVE_POSIX_SIGNALS
 223                                                         /* POSIX signals */
 224
 225 #define SIGNALS_UNBLOCK \
 226       do { sigset_t set;        \
 227         sigemptyset (&set);     \
 228         sigprocmask (SIG_SETMASK, &set, (sigset_t *)NULL);      \
 229       } while (0)
 230
 231 #define SIGNALS_DECLARE_SAVED(name)     sigset_t name
 232
 233 #define SIGNALS_BLOCK(SIG, saved)       \
 234         do { sigset_t set;              \
 235           sigemptyset (&set);           \
 236           sigaddset (&set, SIG);        \
 237           sigprocmask (SIG_BLOCK, &set, &saved);        \
 238         } while (0)
 239
 240 #define SIGNALS_RESTORE(saved)          \
 241   sigprocmask (SIG_SETMASK, &saved, (sigset_t *)NULL)
 242
 243
 244 #else   /* HAVE_POSIX_SIGNALS */
 245 #ifdef HAVE_BSD_SIGNALS
 246                                                         /* BSD signals */
 247
 248 #define SIGNALS_UNBLOCK                 sigsetmask (0)
 249 #define SIGNALS_DECLARE_SAVED(name)     int name
 250 #define SIGNALS_BLOCK(SIG, saved)       saved = sigblock (sigmask (SIG))
 251 #define SIGNALS_RESTORE(saved)          sigsetmask (saved)
 252
 253
 254 #else  /* HAVE_BSD_SIGNALS */
 255                                                         /* None of the Above */
 256
 257 #define SIGNALS_UNBLOCK                 /* nothing */
 258 #define SIGNALS_DECLARE_SAVED(name)     /* nothing */
 259 #define SIGNALS_BLOCK(SIG, saved)       /* nothing */
 260 #define SIGNALS_RESTORE(saved)          /* nothing */
 261
 262
 263 #endif /* HAVE_BSD_SIGNALS */
 264 #endif /* HAVE_POSIX_SIGNALS */
 265
 266 #if !defined (strchr)
 267 extern char *strchr ();
 268 #endif
 269 #if !defined (strrchr)
 270 extern char *strrchr ();
 271 #endif
 272 #ifdef __STDC__
 273 #include <stddef.h>
 274 extern size_t strlen (const char *s);
 275 #endif  /* __STDC__ */
 276
 277 /*  End of signal handling definitions.  */
 278 #endif /* !_RLDEFS_H */