1 /* 2 * Copyright (C) 1996 by Andrey A. Chernov, Moscow, Russia. 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 ``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 REGENTS 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 * $Id$ 27 */ 28 29 #define ASCII_COMPATIBLE_COLLATE /* see usr.bin/colldef/data */ 30 31 #include <string.h> 32 #include "collate.h" 33 #ifndef ASCII_COMPATIBLE_COLLATE 34 #include <ctype.h> 35 #endif 36 37 /* Temporary backward compatibility */ 38 39 int collate_range_cmp (c1, c2) 40 int c1, c2; 41 { 42 return __collate_range_cmp(c1, c2); 43 } 44 45 46 /* 47 * Compare two characters converting collate information 48 * into ASCII-compatible range, it allows to handle 49 * "[a-z]"-type ranges with national characters. 50 */ 51 52 int __collate_range_cmp (c1, c2) 53 int c1, c2; 54 { 55 static char s1[2], s2[2]; 56 int ret; 57 #ifndef ASCII_COMPATIBLE_COLLATE 58 int as1, as2, al1, al2; 59 #endif 60 61 c1 &= UCHAR_MAX; 62 c2 &= UCHAR_MAX; 63 if (c1 == c2) 64 return (0); 65 66 #ifndef ASCII_COMPATIBLE_COLLATE 67 as1 = isascii(c1); 68 as2 = isascii(c2); 69 al1 = isalpha(c1); 70 al2 = isalpha(c2); 71 72 if (as1 || as2 || al1 || al2) { 73 if ((as1 && as2) || (!al1 && !al2)) 74 return (c1 - c2); 75 if (al1 && !al2) { 76 if (isupper(c1)) 77 return ('A' - c2); 78 else 79 return ('a' - c2); 80 } else if (al2 && !al1) { 81 if (isupper(c2)) 82 return (c1 - 'A'); 83 else 84 return (c1 - 'a'); 85 } 86 } 87 #endif 88 s1[0] = c1; 89 s2[0] = c2; 90 if ((ret = strcoll(s1, s2)) != 0) 91 return (ret); 92 return (c1 - c2); 93 } 94