1 /* Locale-specific memory comparison.
2 Copyright 1999, 2002 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
18 /* Contributed by Paul Eggert <eggert@twinsun.com>. */
29 #include <sys/types.h>
35 /* Use strcoll() only if it really works. */
37 # define STRCOLL strcoll
39 # define STRCOLL strcmp
42 /* Compare S1 (with length S1LEN) and S2 (with length S2LEN) according
43 to the LC_COLLATE locale. S1 and S2 do not overlap, and are not
44 adjacent. Temporarily modify the bytes after S1 and S2, but
45 restore their original contents before returning. Set errno to an
46 error number if there is an error, and to zero otherwise. */
48 memcoll (char *s1, size_t s1len, char *s2, size_t s2len)
57 while (! (errno = 0, (diff = STRCOLL (s1, s2)) || errno))
59 /* strcoll found no difference, but perhaps it was fooled by NUL
60 characters in the data. Work around this problem by advancing
61 past the NUL chars. */
62 size_t size1 = strlen (s1) + 1;
63 size_t size2 = strlen (s2) + 1;