annotate lib/wcsrchr-impl.h @ 17249:e542fd46ad6f

maint: update all copyright year number ranges Run "make update-copyright". Compare to commit 1602f0a from last year. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Tue, 01 Jan 2013 00:50:58 +0000
parents 8250f2777afc
children 344018b6e5d7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Search wide string for a wide character.
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2 Copyright (C) 1999, 2011-2013 Free Software Foundation, Inc.
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3 Written by Bruno Haible <bruno@clisp.org>, 1999.
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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 wchar_t *
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19 wcsrchr (const wchar_t *wcs, wchar_t wc)
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20 {
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21 /* Calling wcslen and then searching from the other end would cause more
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22 memory accesses. Avoid that, at the cost of a few more comparisons. */
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23 wchar_t *result = NULL;
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24
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25 for (;; wcs++)
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26 {
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27 if (*wcs == wc)
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28 result = (wchar_t *) wcs;
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29 if (*wcs == (wchar_t)'\0')
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30 break;
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31 }
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32 return result;
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33 }