1 /* Compare at most N characters of two strings without taking care for
3 Copyright (C) 1992-2015 Free Software Foundation, Inc.
4 This file is part of the GNU C Library.
6 The GNU C Library is free software; you can redistribute it and/or
7 modify it under the terms of the GNU Lesser General Public
8 License as published by the Free Software Foundation; either
9 version 2.1 of the License, or (at your option) any later version.
11 The GNU C Library 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
17 License along with the GNU C Library; if not, see
18 <http://www.gnu.org/licenses/>. */
28 # define __strncasecmp strncasecmp
29 # define TOLOWER(Ch) tolower (Ch)
31 # include <locale/localeinfo.h>
32 # ifdef USE_IN_EXTENDED_LOCALE_MODEL
33 # define __strncasecmp __strncasecmp_l
35 # define TOLOWER(Ch) __tolower_l ((Ch), loc)
38 #ifdef USE_IN_EXTENDED_LOCALE_MODEL
39 # define LOCALE_PARAM , loc
40 # define LOCALE_PARAM_DECL __locale_t loc;
43 # define LOCALE_PARAM_DECL
46 /* Compare no more than N characters of S1 and S2,
47 ignoring case, returning less than, equal to or
48 greater than zero if S1 is lexicographically less
49 than, equal to or greater than S2. */
51 __strncasecmp (s1
, s2
, n LOCALE_PARAM
)
57 #if defined _LIBC && !defined USE_IN_EXTENDED_LOCALE_MODEL
58 __locale_t loc
= _NL_CURRENT_LOCALE
;
60 const unsigned char *p1
= (const unsigned char *) s1
;
61 const unsigned char *p2
= (const unsigned char *) s2
;
64 if (p1
== p2
|| n
== 0)
67 while ((result
= TOLOWER (*p1
) - TOLOWER (*p2
++)) == 0)
68 if (*p1
++ == '\0' || --n
== 0)
74 weak_alias (__strncasecmp
, strncasecmp
)