/*
 * 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.
 */

/*
 * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

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

int
strcoll(const char *s, const char *s2)
{
	int len, len2, prim, prim2, sec, sec2, ret, ret2;
	const char *t, *t2;
	char *tt, *tt2;

	if (__collate_load_error)
		return (strcmp(s, s2));

	len = len2 = 1;
	ret = ret2 = 0;
	if (__collate_substitute_nontrivial) {
		t = tt = __collate_substitute(s);
		t2 = tt2 = __collate_substitute(s2);
		if ((tt == NULL) || (tt2 == NULL)) {
			errno = ENOMEM;
			if (tt)
				free(tt);
			if (tt2)
				free(tt2);
			/*
			 * All we can do here is set errno, the application
			 * is obliged to check it.
			 */
			return (strcmp(s, s2));
		}
	} else {
		tt = tt2 = NULL;
		t = s;
		t2 = s2;
	}
	while (*t && *t2) {
		prim = prim2 = 0;
		while (*t && !prim) {
			__collate_lookup(t, &len, &prim, &sec);
			t += len;
		}
		while (*t2 && !prim2) {
			__collate_lookup(t2, &len2, &prim2, &sec2);
			t2 += len2;
		}
		if (!prim || !prim2)
			break;
		if (prim != prim2) {
			ret = prim - prim2;
			goto end;
		}
		if (!ret2)
			ret2 = sec - sec2;
	}
	if (!*t && *t2)
		ret = -(int)((uchar_t)*t2);
	else if (*t && !*t2)
		ret = (uchar_t)*t;
	else if (!*t && !*t2)
		ret = ret2;
end:
	free(tt);
	free(tt2);

	return (ret);
}