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