[apple/libc.git] / locale / FreeBSD / mbstowcs.c

/*-
 * 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. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. 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>
__FBSDID("$FreeBSD: src/lib/libc/locale/mbstowcs.c,v 1.6 2002/11/09 04:13:26 tjr Exp $");

#include <errno.h>
#include <stdlib.h>
#include <limits.h>
#include <stddef.h>
#include <rune.h>

size_t
mbstowcs(wchar_t * __restrict pwcs, const char * __restrict s, size_t n)
{
	const char *e;
	int cnt;
	rune_t r;

	if (s == NULL) {
		errno = EINVAL;
		return (-1);
	}

	if (pwcs == NULL) {
		/* Convert and count only, do not store. */
		cnt = 0;
		while ((r = sgetrune(s, MB_LEN_MAX, &e)) != _INVALID_RUNE &&
		    r != 0) {
			s = e;
			cnt++;
		}
		if (r == _INVALID_RUNE) {
			errno = EILSEQ;
			return (-1);
		}
		return (cnt);
	}

	/* Convert, store and count characters. */
	cnt = 0;
	while (n-- > 0) {
		*pwcs = sgetrune(s, MB_LEN_MAX, &e);
		if (*pwcs == _INVALID_RUNE) {
			errno = EILSEQ;
			return (-1);
		}
		if (*pwcs++ == L'\0')
			break;
		s = e;
		++cnt;
	}

	return (cnt);
}
Commit	Line	Data
5b2abdfb A	1	/*-
5b2abdfb A	2	* Copyright (c) 1993
e9ce8d39 A	3	* The Regents of the University of California. All rights reserved.
	4	*
	5	* This code is derived from software contributed to Berkeley by
5b2abdfb	6	* Paul Borman at Krystal Technologies.
e9ce8d39 A	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
9385eb3d A	37	#include <sys/cdefs.h>
	38	__FBSDID("$FreeBSD: src/lib/libc/locale/mbstowcs.c,v 1.6 2002/11/09 04:13:26 tjr Exp $");
	39
	40	#include <errno.h>
	41	#include <stdlib.h>
	42	#include <limits.h>
	43	#include <stddef.h>
5b2abdfb	44	#include <rune.h>
e9ce8d39	45
9385eb3d A	46	size_t
9385eb3d A	47	mbstowcs(wchar_t * __restrict pwcs, const char * __restrict s, size_t n)
e9ce8d39	48	{
9385eb3d A	49	const char *e;
	50	int cnt;
	51	rune_t r;
	52
	53	if (s == NULL) {
	54	errno = EINVAL;
	55	return (-1);
	56	}
5b2abdfb	57
9385eb3d A	58	if (pwcs == NULL) {
	59	/* Convert and count only, do not store. */
	60	cnt = 0;
	61	while ((r = sgetrune(s, MB_LEN_MAX, &e)) != _INVALID_RUNE &&
	62	r != 0) {
	63	s = e;
	64	cnt++;
	65	}
	66	if (r == _INVALID_RUNE) {
	67	errno = EILSEQ;
	68	return (-1);
	69	}
	70	return (cnt);
	71	}
5b2abdfb	72
9385eb3d A	73	/* Convert, store and count characters. */
	74	cnt = 0;
	75	while (n-- > 0) {
	76	*pwcs = sgetrune(s, MB_LEN_MAX, &e);
	77	if (*pwcs == _INVALID_RUNE) {
	78	errno = EILSEQ;
	79	return (-1);
5b2abdfb	80	}
9385eb3d A	81	if (*pwcs++ == L'\0')
	82	break;
	83	s = e;
	84	++cnt;
5b2abdfb A	85	}
5b2abdfb A	86
9385eb3d	87	return (cnt);
e9ce8d39	88	}