[apple/libc.git] / string / FreeBSD / strxfrm.c

/*-
 * Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
 *		at Electronni Visti IA, Kiev, Ukraine.
 *			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 ``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 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/string/strxfrm.c,v 1.15 2002/09/06 11:24:06 tjr Exp $");

#include <stdlib.h>
#include <string.h>
#include "collate.h"

size_t
strxfrm(char * __restrict dest, const char * __restrict src, size_t len)
{
	int prim, sec, l;
	size_t slen;
	char *s, *ss;

	if (!*src) {
		if (len > 0)
			*dest = '\0';
		return 0;
	}

	if (__collate_load_error) {
		slen = strlen(src);
		if (len > 0) {
			if (slen < len)
				strcpy(dest, src);
			else {
				strncpy(dest, src, len - 1);
				dest[len - 1] = '\0';
			}
		}
		return slen;
	}

	slen = 0;
	prim = sec = 0;
	ss = s = __collate_substitute(src);
	while (*s) {
		while (*s && !prim) {
			__collate_lookup(s, &l, &prim, &sec);
			s += l;
		}
		if (prim) {
			if (len > 1) {
				*dest++ = (char)prim;
				len--;
			}
			slen++;
			prim = 0;
		}
	}
	free(ss);
	if (len > 0)
		*dest = '\0';

	return slen;
}
Commit	Line	Data
5b2abdfb A	1	/*-
	2	* Copyright (c) 1995 Alex Tatmanjants <alex@elvisti.kiev.ua>
	3	* at Electronni Visti IA, Kiev, Ukraine.
	4	* All rights reserved.
	5	*
	6	* Redistribution and use in source and binary forms, with or without
	7	* modification, are permitted provided that the following conditions
	8	* are met:
	9	* 1. Redistributions of source code must retain the above copyright
	10	* notice, this list of conditions and the following disclaimer.
	11	* 2. Redistributions in binary form must reproduce the above copyright
	12	* notice, this list of conditions and the following disclaimer in the
	13	* documentation and/or other materials provided with the distribution.
	14	*
	15	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND
	16	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	17	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	18	* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
	19	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	20	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	21	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	22	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	23	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	24	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	25	* SUCH DAMAGE.
5b2abdfb A	26	*/
5b2abdfb A	27
5b2abdfb	28	#include <sys/cdefs.h>
9385eb3d A	29	__FBSDID("$FreeBSD: src/lib/libc/string/strxfrm.c,v 1.15 2002/09/06 11:24:06 tjr Exp $");
	30
	31	#include <stdlib.h>
	32	#include <string.h>
	33	#include "collate.h"
5b2abdfb	34
9385eb3d A	35	size_t
	36	strxfrm(char * __restrict dest, const char * __restrict src, size_t len)
	37	{
	38	int prim, sec, l;
	39	size_t slen;
	40	char s, ss;
5b2abdfb	41
9385eb3d A	42	if (!*src) {
	43	if (len > 0)
	44	*dest = '\0';
	45	return 0;
	46	}
5b2abdfb	47
9385eb3d A	48	if (__collate_load_error) {
	49	slen = strlen(src);
	50	if (len > 0) {
	51	if (slen < len)
	52	strcpy(dest, src);
	53	else {
	54	strncpy(dest, src, len - 1);
	55	dest[len - 1] = '\0';
	56	}
	57	}
	58	return slen;
	59	}
5b2abdfb	60
9385eb3d A	61	slen = 0;
	62	prim = sec = 0;
	63	ss = s = __collate_substitute(src);
	64	while (*s) {
	65	while (*s && !prim) {
	66	__collate_lookup(s, &l, &prim, &sec);
	67	s += l;
	68	}
	69	if (prim) {
	70	if (len > 1) {
	71	*dest++ = (char)prim;
	72	len--;
	73	}
	74	slen++;
	75	prim = 0;
	76	}
	77	}
	78	free(ss);
	79	if (len > 0)
	80	*dest = '\0';
5b2abdfb	81
9385eb3d A	82	return slen;
9385eb3d A	83	}