annotate lib/wcsncasecmp-impl.h @ 16201:8250f2777afc

maint: update all copyright year number ranges Run "make update-copyright".
author Jim Meyering <meyering@redhat.com>
date Sun, 01 Jan 2012 10:04:58 +0100
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1 /* Compare two wide strings ignoring case.
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2 Copyright (C) 1999, 2011-2012 Free Software Foundation, Inc.
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3 Written by Bruno Haible <bruno@clisp.org>, 2011.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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17
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18 int
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19 wcsncasecmp (const wchar_t *s1, const wchar_t *s2, size_t n)
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20 {
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21 for (; n > 0;)
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22 {
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23 wchar_t wc1 = towlower (*s1++);
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24 wchar_t wc2 = towlower (*s2++);
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25 if (wc1 != (wchar_t)'\0' && wc1 == wc2)
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26 {
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27 n--;
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28 continue;
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29 }
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30 /* Note that wc1 and wc2 each have at most 31 bits. */
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31 return (int)wc1 - (int)wc2;
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32 /* > 0 if wc1 > wc2, < 0 if wc1 < wc2,
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33 = 0 if wc1 and wc2 are both '\0'. */
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34 }
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35 return 0;
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36 }