| 1 | /* |
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| 2 | * Copyright (C) 1996 by Andrey A. Chernov, Moscow, Russia. |
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| 3 | * All rights reserved. |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * 1. Redistributions of source code must retain the above copyright |
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| 9 | * notice, this list of conditions and the following disclaimer. |
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| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 11 | * notice, this list of conditions and the following disclaimer in the |
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| 12 | * documentation and/or other materials provided with the distribution. |
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| 13 | * |
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| 14 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND |
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| 15 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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| 16 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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| 17 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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| 18 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| 19 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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| 20 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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| 21 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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| 22 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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| 23 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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| 24 | * SUCH DAMAGE. |
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| 25 | */ |
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| 26 | |
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| 27 | #include <sys/cdefs.h> |
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| 28 | |
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| 29 | #define ASCII_COMPATIBLE_COLLATE /* see share/colldef */ |
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| 30 | |
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| 31 | #include <string.h> |
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| 32 | #include "collate.h" |
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| 33 | #ifndef ASCII_COMPATIBLE_COLLATE |
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| 34 | #include <ctype.h> |
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| 35 | #endif |
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| 36 | |
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| 37 | /* |
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| 38 | * Compare two characters converting collate information |
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| 39 | * into ASCII-compatible range, it allows to handle |
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| 40 | * "[a-z]"-type ranges with national characters. |
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| 41 | */ |
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| 42 | |
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| 43 | int __collate_range_cmp (c1, c2) |
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| 44 | int c1, c2; |
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| 45 | { |
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| 46 | static char s1[2], s2[2]; |
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| 47 | int ret; |
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| 48 | #ifndef ASCII_COMPATIBLE_COLLATE |
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| 49 | int as1, as2, al1, al2; |
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| 50 | #endif |
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| 51 | |
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| 52 | c1 &= UCHAR_MAX; |
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| 53 | c2 &= UCHAR_MAX; |
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| 54 | if (c1 == c2) |
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| 55 | return (0); |
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| 56 | |
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| 57 | #ifndef ASCII_COMPATIBLE_COLLATE |
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| 58 | as1 = isascii(c1); |
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| 59 | as2 = isascii(c2); |
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| 60 | al1 = isalpha(c1); |
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| 61 | al2 = isalpha(c2); |
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| 62 | |
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| 63 | if (as1 || as2 || al1 || al2) { |
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| 64 | if ((as1 && as2) || (!al1 && !al2)) |
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| 65 | return (c1 - c2); |
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| 66 | if (al1 && !al2) { |
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| 67 | if (isupper(c1)) |
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| 68 | return ('A' - c2); |
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| 69 | else |
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| 70 | return ('a' - c2); |
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| 71 | } else if (al2 && !al1) { |
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| 72 | if (isupper(c2)) |
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| 73 | return (c1 - 'A'); |
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| 74 | else |
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| 75 | return (c1 - 'a'); |
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| 76 | } |
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| 77 | } |
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| 78 | #endif |
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| 79 | s1[0] = c1; |
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| 80 | s2[0] = c2; |
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| 81 | if ((ret = strcoll(s1, s2)) != 0) |
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| 82 | return (ret); |
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| 83 | return (c1 - c2); |
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| 84 | } |
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