collcmp.c revision 19129
117530Sache/* 217530Sache * Copyright (C) 1996 by Andrey A. Chernov, Moscow, Russia. 317530Sache * All rights reserved. 417530Sache * 517530Sache * Redistribution and use in source and binary forms, with or without 617530Sache * modification, are permitted provided that the following conditions 717530Sache * are met: 817530Sache * 1. Redistributions of source code must retain the above copyright 917530Sache * notice, this list of conditions and the following disclaimer. 1017530Sache * 2. Redistributions in binary form must reproduce the above copyright 1117530Sache * notice, this list of conditions and the following disclaimer in the 1217530Sache * documentation and/or other materials provided with the distribution. 1317530Sache * 1417530Sache * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND 1517530Sache * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1617530Sache * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1717530Sache * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 1817530Sache * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1917530Sache * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2017530Sache * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2117530Sache * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2217530Sache * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2317530Sache * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2417530Sache * SUCH DAMAGE. 2517599Sache * 2619129Sache * $Id: collcmp.c,v 1.6 1996/09/17 19:27:06 ache Exp $ 2717530Sache */ 2817530Sache 2919129Sache#define ASCII_COMPATIBLE_COLLATE /* see usr.bin/colldef/data */ 3019129Sache 3117530Sache#include <string.h> 3217556Sache#include <limits.h> 3317551Sache#include <locale.h> 3419129Sache#ifndef ASCII_COMPATIBLE_COLLATE 3519129Sache#include <ctype.h> 3619129Sache#endif 3717551Sache 3818331Sache/* 3918331Sache * Compare two characters converting collate information 4018331Sache * into ASCII-compatible range, it allows to handle 4118331Sache * "[a-z]"-type ranges with national characters. 4218331Sache */ 4318331Sache 4417551Sacheint collate_range_cmp (c1, c2) 4517551Sache int c1, c2; 4617551Sache{ 4717530Sache static char s1[2], s2[2]; 4819129Sache int ret; 4919129Sache#ifndef ASCII_COMPATIBLE_COLLATE 5019129Sache int as1, as2, al1, al2; 5119129Sache#endif 5217530Sache 5317551Sache c1 &= UCHAR_MAX; 5417551Sache c2 &= UCHAR_MAX; 5517530Sache if (c1 == c2) 5617530Sache return (0); 5717576Sache 5819129Sache#ifndef ASCII_COMPATIBLE_COLLATE 5917576Sache as1 = isascii(c1); 6017576Sache as2 = isascii(c2); 6117576Sache al1 = isalpha(c1); 6217576Sache al2 = isalpha(c2); 6317576Sache 6417576Sache if (as1 || as2 || al1 || al2) { 6517576Sache if ((as1 && as2) || (!al1 && !al2)) 6617576Sache return (c1 - c2); 6717576Sache if (al1 && !al2) { 6817576Sache if (isupper(c1)) 6917576Sache return ('A' - c2); 7017576Sache else 7117576Sache return ('a' - c2); 7217576Sache } else if (al2 && !al1) { 7317576Sache if (isupper(c2)) 7417576Sache return (c1 - 'A'); 7517576Sache else 7617576Sache return (c1 - 'a'); 7717576Sache } 7817530Sache } 7919129Sache#endif 8017551Sache s1[0] = c1; 8117551Sache s2[0] = c2; 8218331Sache if ((ret = strcoll(s1, s2)) != 0) 8318331Sache return (ret); 8418331Sache return (c1 - c2); 8517530Sache} 86