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/*
* Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
* 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>
__FBSDID("$FreeBSD$");
#include <ctype.h>
#include <limits.h>
#include <stddef.h>
static const char nogrouping[] = { CHAR_MAX, '\0' };
/*
* Internal helper used to convert grouping sequences from string
* representation into POSIX specified form, i.e.
*
* "3;3;-1" -> "\003\003\177\000"
*/
const char *
__fix_locale_grouping_str(const char *str)
{
char *src, *dst;
char n;
if (str == NULL || *str == '\0') {
return nogrouping;
}
for (src = (char*)str, dst = (char*)str; *src != '\0'; src++) {
/* input string examples: "3;3", "3;2;-1" */
if (*src == ';')
continue;
if (*src == '-' && *(src+1) == '1') {
*dst++ = CHAR_MAX;
src++;
continue;
}
if (!isdigit((unsigned char)*src)) {
/* broken grouping string */
return nogrouping;
}
/* assume all numbers <= 99 */
n = *src - '0';
if (isdigit((unsigned char)*(src+1))) {
src++;
n *= 10;
n += *src - '0';
}
*dst = n;
/* NOTE: assume all input started with "0" as 'no grouping' */
if (*dst == '\0')
return (dst == (char*)str) ? nogrouping : str;
dst++;
}
*dst = '\0';
return str;
}
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