* Copyright (c) 1983 Regents of the University of California,
* All rights reserved. Redistribution permitted subject to
* the terms of the Berkeley Software License Agreement.
* Macros and things to deal with control characters.
* Unctrl() is just like the standard function, except we don't want
* 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
* Isunctrl() includes all characters that should be expanded
* using unctrl() by wwwrite() if ww_unctrl is set.
#define ctrl(c) ('c' & 0x1f)
#define unctrl(c) (_unctrl[(unsigned char) (c)])
#define isctrl(c) (_cmap[(unsigned char) (c)] & _C)
#define isprt(c) (_cmap[(unsigned char) (c)] & _P)
#define isunctrl(c) (_cmap[(unsigned char) (c)] & _U)