1/*
2 * Copyright (c) 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/*
28 * Copyright 2010 Nexenta Systems, Inc.  All rights reserved.
29 * Use is subject to license terms.
30 */
31
32#include "lint.h"
33#include <ctype.h>
34#include <limits.h>
35#include <stddef.h>
36
37static const char nogrouping[] = { CHAR_MAX, '\0' };
38
39/*
40 * Internal helper used to convert grouping sequences from string
41 * representation into POSIX specified form, i.e.
42 *
43 * "3;3;-1" -> "\003\003\177\000"
44 */
45
46const char *
47__fix_locale_grouping_str(const char *str)
48{
49	char *src, *dst;
50	char n;
51
52	if (str == NULL || *str == '\0') {
53		return (nogrouping);
54	}
55
56	for (src = (char *)str, dst = (char *)str; *src != '\0'; src++) {
57
58		/* input string examples: "3;3", "3;2;-1" */
59		if (*src == ';')
60			continue;
61
62		if (*src == '-' && *(src+1) == '1') {
63			*dst++ = CHAR_MAX;
64			src++;
65			continue;
66		}
67
68		if (!isdigit((unsigned char)*src)) {
69			/* broken grouping string */
70			return (nogrouping);
71		}
72
73		/* assume all numbers <= 99 */
74		n = *src - '0';
75		if (isdigit((unsigned char)*(src+1))) {
76			src++;
77			n *= 10;
78			n += *src - '0';
79		}
80
81		*dst = n;
82		/* NOTE: assume all input started with "0" as 'no grouping' */
83		if (*dst == '\0')
84			return ((dst == (char *)str) ? nogrouping : str);
85		dst++;
86	}
87	*dst = '\0';
88	return (str);
89}
90