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83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
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/*
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* Copyright (c) 2001 Alexey Zelkin <phantom@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <ctype.h>
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#include <limits.h>
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#include <stddef.h>
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static const char nogrouping[] = { CHAR_MAX, '\0' };
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/*
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* "3;3;-1" -> "\003\003\177"
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*/
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const char *
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__fix_locale_grouping_str(const char *str) {
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char *src, *dst;
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char n;
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if (str == NULL || *str == '\0') {
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return nogrouping;
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}
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for (src = (char*)str, dst = (char*)str; *src != '\0'; src++) {
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/* input string examples: "3;3", "3;2;-1" */
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if (*src == ';')
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continue;
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if (*src == '-' && *(src+1) == '1') {
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*dst++ = CHAR_MAX;
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src++;
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continue;
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}
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if (!isdigit((unsigned char)*src)) {
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/* broken grouping string */
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return nogrouping;
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}
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/* assume all numbers <= 99 */
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n = *src - '0';
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if (isdigit((unsigned char)*(src+1))) {
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src++;
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n *= 10;
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n += *src - '0';
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}
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*dst = n;
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/* NOTE: assume all input started with "0" as 'no grouping' */
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if (*dst == '\0')
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return (dst == (char*)str) ? nogrouping : str;
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dst++;
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}
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*dst = '\0';
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return str;
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}
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