usr.bin/window/char.h

   1 /*
   2  * Copyright (c) 1983, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Edward Wang at The University of California, Berkeley.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 3. All advertising materials mentioning features or use of this software
  17  *    must display the following acknowledgement:
  18  *      This product includes software developed by the University of
  19  *      California, Berkeley and its contributors.
  20  * 4. Neither the name of the University nor the names of its contributors
  21  *    may be used to endorse or promote products derived from this software
  22  *    without specific prior written permission.
  23  *
  24  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  25  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  26  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  27  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  28  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  29  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  30  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  31  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  32  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  33  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  34  * SUCH DAMAGE.
  35  *
  36  *      @(#)char.h      8.1 (Berkeley) 6/6/93
  37  * $FreeBSD: src/usr.bin/window/char.h,v 1.3.6.1 2001/05/17 09:45:00 obrien Exp $
  38  * $DragonFly: src/usr.bin/window/char.h,v 1.2 2003/06/17 04:29:33 dillon Exp $
  39  */
  40
  41 /*
  42  * Macros and things to deal with control characters.
  43  *
  44  * Unctrl() is just like the standard function, except we don't want
  45  * to include curses.
  46  * Isctrl() returns true for all characters less than space and
  47  * greater than or equal to delete.
  48  * Isprt() is tab and all characters not isctrl().  It's used
  49  * by wwwrite().
  50  * Isunctrl() includes all characters that should be expanded
  51  * using unctrl() by wwwrite() if ww_unctrl is set.
  52  */
  53
  54 #include <ctype.h>
  55 #include <string.h>
  56 #include <stdlib.h>
  57
  58 extern char *_unctrl[];
  59 #define ctrl(c)         (c & 0x1f)
  60 #define unctrl(c)       (_unctrl[(unsigned char) (c)])
  61 #define isctrl(c)       iscntrl((unsigned char)(c))
  62 #define isprt(c)        (isprint((unsigned char)(c)) || (c) == '\t')
  63 #define isunctrl(c)     (strchr("\b\t\n\r", (c)) == NULL && isctrl(c))