NetBSD-5.0.2/lib/libc/locale/_wctype.c

/* $NetBSD: _wctype.c,v 1.2.2.3 2009/01/22 22:04:28 snj Exp $ */

/*-
 * Copyright (c)2008 Citrus Project,
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

/*-
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Paul Borman at Krystal Technologies.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: _wctype.c,v 1.2.2.3 2009/01/22 22:04:28 snj Exp $");
#endif /* LIBC_SCCS and not lint */

#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <string.h>

#include "rune.h"
#include "_wctrans_local.h"
#include "_wctype_local.h"

_RuneType
_runetype_priv(_RuneLocale const *rl, wint_t wc)
{
	__nbrune_t wc0;
	_RuneRange const *rr;
	_RuneEntry *base, *re;
	uint32_t x;

	_DIAGASSERT(rl != NULL);

	if (wc == WEOF)
		return 0U;
	if (_RUNE_ISCACHED(wc))
		return rl->rl_runetype[(size_t)wc];
	wc0 = (__nbrune_t)wc;
	rr = &rl->rl_runetype_ext;
	_DIAGASSERT(rr != NULL);
	base = rr->rr_rune_ranges;
	for (x = rr->rr_nranges; x != (uint32_t)0; x >>= 1) {
		re = base + (x >> 1);
		if (re->re_min <= wc0 && re->re_max >= wc0) {
			if (re->re_rune_types)
				return re->re_rune_types[wc0 - re->re_min];
			else
				return re->re_map;
		} else if (wc0 > re->re_max) {
			base = re + 1;
			--x;
		}
	}
	return (_RuneType)0U;
}

int
_iswctype_priv(_RuneLocale const *rl,
    wint_t wc, _WCTypeEntry const *te)
{
	return !!(_runetype_priv(rl, wc) & te->te_mask);
}

wint_t
/*ARGSUSED*/
_towctrans_priv(_RuneLocale const *rl,
    wint_t wc, _WCTransEntry const *te)
{
	__nbrune_t wc0;
	_RuneRange *rr;
	_RuneEntry *base, *re;
	uint32_t x;

	_DIAGASSERT(rl != NULL);
	_DIAGASSERT(te != NULL);

	if (wc == WEOF)
		return wc;
	_DIAGASSERT(te->te_name != NULL);
	if (_RUNE_ISCACHED(wc))
		return te->te_cached[(size_t)wc];
	wc0 = (__nbrune_t)wc;
	rr = te->te_extmap;
	_DIAGASSERT(rr != NULL);
	base = rr->rr_rune_ranges;
	for (x = rr->rr_nranges; x != (uint32_t)0; x >>= 1) {
		re = base + (x >> 1);
		if (re->re_min <= wc0 && re->re_max >= wc0) {
			return re->re_map + wc0 - re->re_min;
		} else if (wc0 >= re->re_max) {
			base = re + 1;
			--x;
		}
	}
	return wc;
}