1/*
2 * Copyright (c) 2000, 2001 Alexey Zelkin <phantom@FreeBSD.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: src/lib/libc/locale/lnumeric.c,v 1.16 2003/06/26 10:46:16 phantom Exp $");
29
30#include "xlocale_private.h"
31
32#include <limits.h>
33#include <string.h>
34
35#include "ldpart.h"
36#include "lnumeric.h"
37
38extern const char *__fix_locale_grouping_str(const char *);
39
40#define LCNUMERIC_SIZE (sizeof(struct lc_numeric_T) / sizeof(char *))
41
42static const struct lc_numeric_T _C_numeric_locale = {
43	".",     	/* decimal_point */
44	"",     	/* thousands_sep */
45	""		/* grouping [C99 7.11.2.1]*/
46};
47
48__private_extern__ int
49__numeric_load_locale(const char *name, locale_t loc)
50{
51	int ret;
52	struct __xlocale_st_numeric *xp;
53	static struct __xlocale_st_numeric *cache = NULL;
54
55	/* 'name' must be already checked. */
56	if (strcmp(name, "C") == 0 || strcmp(name, "POSIX") == 0) {
57		if (!loc->_numeric_using_locale)
58			return (_LDP_CACHE);
59		loc->_numeric_using_locale = 0;
60		XL_RELEASE(loc->__lc_numeric);
61		loc->__lc_numeric = NULL;
62		loc->__nlocale_changed = 1;
63		return (_LDP_CACHE);
64	}
65
66	if (loc->_numeric_using_locale && strcmp(name, loc->__lc_numeric->_numeric_locale_buf) == 0)
67		return (_LDP_CACHE);
68	/*
69	 * If the locale name is the same as our cache, use the cache.
70	 */
71	if (cache && cache->_numeric_locale_buf && strcmp(name, cache->_numeric_locale_buf) == 0) {
72		loc->_numeric_using_locale = 1;
73		XL_RELEASE(loc->__lc_numeric);
74		loc->__lc_numeric = cache;
75		XL_RETAIN(loc->__lc_numeric);
76		loc->__nlocale_changed = 1;
77		return (_LDP_CACHE);
78	}
79	if ((xp = (struct __xlocale_st_numeric *)malloc(sizeof(*xp))) == NULL)
80		return _LDP_ERROR;
81	xp->__refcount = 1;
82	xp->__free_extra = (__free_extra_t)__ldpart_free_extra;
83	xp->_numeric_locale_buf = NULL;
84
85	ret = __part_load_locale(name, &loc->_numeric_using_locale,
86		&xp->_numeric_locale_buf, "LC_NUMERIC",
87		LCNUMERIC_SIZE, LCNUMERIC_SIZE,
88		(const char **)&xp->_numeric_locale);
89	if (ret != _LDP_ERROR)
90		loc->__nlocale_changed = 1;
91	else
92		free(xp);
93	if (ret == _LDP_LOADED) {
94		/* Can't be empty according to C99 */
95		if (*xp->_numeric_locale.decimal_point == '\0')
96			xp->_numeric_locale.decimal_point =
97			    _C_numeric_locale.decimal_point;
98		xp->_numeric_locale.grouping =
99		    __fix_locale_grouping_str(xp->_numeric_locale.grouping);
100		XL_RELEASE(loc->__lc_numeric);
101		loc->__lc_numeric = xp;
102		XL_RELEASE(cache);
103		cache = xp;
104		XL_RETAIN(cache);
105	}
106	return (ret);
107}
108
109__private_extern__ struct lc_numeric_T *
110__get_current_numeric_locale(locale_t loc)
111{
112	return (loc->_numeric_using_locale
113		? &loc->__lc_numeric->_numeric_locale
114		: (struct lc_numeric_T *)&_C_numeric_locale);
115}
116
117#ifdef LOCALE_DEBUG
118void
119numericdebug(void) {
120locale_t loc = __current_locale();
121printf(	"decimal_point = %s\n"
122	"thousands_sep = %s\n"
123	"grouping = %s\n",
124	loc->__lc_numeric->_numeric_locale.decimal_point,
125	loc->__lc_numeric->_numeric_locale.thousands_sep,
126	loc->__lc_numeric->_numeric_locale.grouping
127);
128}
129#endif /* LOCALE_DEBUG */
130