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 
37 static 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 
46 const char *
__fix_locale_grouping_str(const char * str)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