fix_grouping.c revision 72321 
1/*
2 * Copyright (c) 2001 Alexey Zelkin
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 * $FreeBSD: head/lib/libc/locale/fix_grouping.c 72321 2001-02-10 15:36:46Z phantom $
27 */
28
29#include <limits.h>
30
31static const char nogrouping[] = { CHAR_MAX, '\0' };
32
33/*
34 * "3;3;-1" -> "\003\003\177"
35 * NOTE: one digit numbers assumed!
36 */
37
38const char *
39__fix_locale_grouping_str(const char *str) {
40
41	char *src, *dst;
42
43	if (str == 0) {
44		return nogrouping;
45	}
46	for (src = (char*)str, dst = (char*)str; *src; src++) {
47		char cur;
48
49		/* input string examples: "3;3", "3;2;-1" */
50		if (*src == ';')
51			continue;
52
53		if (*src == '-' && *(src+1) == '1') {
54			*dst++ = CHAR_MAX;
55			src++;
56			continue;
57		}
58
59		if (!isdigit(*src)) {
60			/* broken grouping string */
61			return nogrouping;
62		}
63
64		*dst++ = *src - '0';
65	}
66	*dst = '\0';
67	return str;
68}
69