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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