/* $NetBSD: generic_lc_all.c,v 1.7 2024/01/20 14:52:48 christos 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.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: generic_lc_all.c,v 1.7 2024/01/20 14:52:48 christos Exp $");
#endif /* LIBC_SCCS and not lint */

#include "namespace.h"
#include <sys/types.h>
#include <assert.h>
#include <langinfo.h>
#define __SETLOCALE_SOURCE__
#include <locale.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "setlocale_local.h"

/*
 * macro required by all template headers
 */
#define _PREFIX(name)   __CONCAT(_generic_LC_ALL_, name)

#include "generic_lc_template_decl.h"

const char *
_generic_LC_ALL_setlocale(const char * __restrict name,
    struct _locale * __restrict locale)
{
        _locale_set_t sl;
        char head[_LOCALENAME_LEN_MAX * (_LC_LAST - 1)], *tail;
        const char *tokens[_LC_LAST], *s, *t;
        int load_locale_success, i, j;

        sl = _find_category(1);
        _DIAGASSERT(sl != NULL);
        load_locale_success = 0;
        if (name != NULL) {
                strlcpy(&head[0], name, sizeof(head));
                tokens[1] = &head[0];
                tail = __UNCONST(strchr(tokens[1], '/'));
                if (tail == NULL) {
                        for (i = 2; i < _LC_LAST; ++i)
                                tokens[i] = tokens[1];
                } else {
                        *tail++ = '\0';
                        for (i = 2; i < _LC_LAST - 1; ++i) {
                                tokens[i] = (const char *)tail;
                                tail = __UNCONST(strchr(tokens[i], '/'));
                                if (tail == NULL)
                                        return NULL;
                                *tail++ = '\0';
                        }
                        tokens[_LC_LAST - 1] = (const char *)tail;
                        tail = __UNCONST(strchr(tokens[i], '/'));
                        if (tail != NULL)
                                return NULL;
                }
                if ((*sl)(tokens[1], locale) != NULL)
                        load_locale_success = 1;
        }
        s = (*sl)(NULL, locale);
        _DIAGASSERT(s != NULL);
        strlcpy(&locale->query[0], s, sizeof(locale->query));
        for (i = 2, j = 0; i < _LC_LAST; ++i) {
                sl = _find_category(i);
                _DIAGASSERT(sl != NULL);
                if (name != NULL) {
                        if ((*sl)(tokens[i], locale) != NULL)
                                load_locale_success = 1;
                }
                t = (*sl)(NULL, locale);
                _DIAGASSERT(t != NULL);
                if (j == 0) {
                        if (!strcmp(s, t))
                                continue;
                        for (j = 2; j < i; ++j) {
                                strlcat(&locale->query[0], "/",
                                    sizeof(locale->query));
                                strlcat(&locale->query[0], s,
                                    sizeof(locale->query));
                        }
                }
                strlcat(&locale->query[0], "/", sizeof(locale->query));
                strlcat(&locale->query[0], t, sizeof(locale->query));
        }
        if (name != NULL && !load_locale_success)
                return NULL;
        return (const char *)&locale->query[0];
}