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 * $FreeBSD: head/lib/libc/locale/fix_grouping.c 116875 2003-06-26 10:46:16Z phantom $ 27 */ 28 29 #include <ctype.h> 30 #include <limits.h> 31 #include <stddef.h> 32 33 const char *__fix_locale_grouping_str(const char *); 34 35 static const char nogrouping[] = { CHAR_MAX, '\0' }; 36 37 /* 38 * Internal helper used to convert grouping sequences from string 39 * representation into POSIX specified form, i.e. 40 * 41 * "3;3;-1" -> "\003\003\177\000" 42 */ 43 44 const char * 45 __fix_locale_grouping_str(const char *str) 46 { 47 char *src, *dst; 48 char n; 49 50 if (str == NULL || *str == '\0') { 51 return nogrouping; 52 } 53 54 for (src = (char*)str, dst = (char*)str; *src != '\0'; src++) { 55 56 /* input string examples: "3;3", "3;2;-1" */ 57 if (*src == ';') 58 continue; 59 60 if (*src == '-' && *(src+1) == '1') { 61 *dst++ = CHAR_MAX; 62 src++; 63 continue; 64 } 65 66 if (!isdigit((unsigned char)*src)) { 67 /* broken grouping string */ 68 return nogrouping; 69 } 70 71 /* assume all numbers <= 99 */ 72 n = *src - '0'; 73 if (isdigit((unsigned char)*(src+1))) { 74 src++; 75 n *= 10; 76 n += *src - '0'; 77 } 78 79 *dst = n; 80 /* NOTE: assume all input started with "0" as 'no grouping' */ 81 if (*dst == '\0') 82 return (dst == (char*)str) ? nogrouping : str; 83 dst++; 84 } 85 *dst = '\0'; 86 return str; 87 } 88