1 /* Search character in UTF-8 string.
2 Copyright (C) 1999, 2002, 2006-2007, 2009-2013 Free Software Foundation,
4 Written by Bruno Haible <bruno@clisp.org>, 2002.
6 This program is free software: you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 Lesser General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
25 u8_strrchr (const uint8_t *s, ucs4_t uc)
27 /* Calling u8_strlen and then searching from the other end would cause more
28 memory accesses. Avoid that, at the cost of a few more comparisons. */
29 uint8_t *result = NULL;
39 result = (uint8_t *) s;
45 switch (u8_uctomb_aux (c, uc, 6))
53 /* FIXME: Maybe walking the string via u8_mblen is a win? */
58 if (*s == c0 && s[1] == c1)
59 result = (uint8_t *) s;
71 /* FIXME: Maybe walking the string via u8_mblen is a win? */
76 if (*s == c0 && s[1] == c1 && s[2] == c2)
77 result = (uint8_t *) s;
83 if (*s && s[1] && s[2])
90 /* FIXME: Maybe walking the string via u8_mblen is a win? */
95 if (*s == c0 && s[1] == c1 && s[2] == c2 && s[3] == c3)
96 result = (uint8_t *) s;