usr/src/usr.bin/window/char.h

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)char.h      3.7 (Berkeley) %G%
 */

/*
 * Macros and things to deal with control characters.
 *
 * Unctrl() is just like the standard function, except we don't want
 * to include curses.
 * Isctrl() returns true for all characters less than space and
 * greater than or equal to delete.
 * Isprt() is tab and all characters not isctrl().  It's used
 * by wwwrite().
 * Isunctrl() includes all characters that should be expanded
 * using unctrl() by wwwrite() if ww_unctrl is set.
 */

extern char *_unctrl[];
extern char _cmap[];
#define ctrl(c)         (c & 0x1f)
#define unctrl(c)       (_unctrl[(unsigned char) (c)])
#define _C              0x01
#define _P              0x02
#define _U              0x04
#define isctrl(c)       (_cmap[(unsigned char) (c)] & _C)
#define isprt(c)        (_cmap[(unsigned char) (c)] & _P)
#define isunctrl(c)     (_cmap[(unsigned char) (c)] & _U)