63 lines
2.7 KiB
C
63 lines
2.7 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Edward Wang at The University of California, Berkeley.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)char.h 8.1 (Berkeley) 6/6/93
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* $FreeBSD$
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*/
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/*
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* Macros and things to deal with control characters.
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*
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* Unctrl() is just like the standard function, except we don't want
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* to include curses.
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* Isctrl() returns true for all characters less than space and
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* greater than or equal to delete.
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* Isprt() is tab and all characters not isctrl(). It's used
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* by wwwrite().
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* Isunctrl() includes all characters that should be expanded
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* using unctrl() by wwwrite() if ww_unctrl is set.
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*/
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#include <ctype.h>
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#include <string.h>
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#include <stdlib.h>
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extern char *_unctrl[];
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#define ctrl(c) (c & 0x1f)
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#define unctrl(c) (_unctrl[(unsigned char) (c)])
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#define isctrl(c) iscntrl((unsigned char)(c))
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#define isprt(c) (isprint((unsigned char)(c)) || (c) == '\t')
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#define isunctrl(c) (strchr("\b\t\n\r", (c)) == NULL && isctrl(c))
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