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author | Paul Eggert <eggert@cs.ucla.edu> | 2005-09-22 06:44:26 +0000 |
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committer | Paul Eggert <eggert@cs.ucla.edu> | 2005-09-22 06:44:26 +0000 |
commit | eba2793d1131e5c03d6357d5a727120340836e8f (patch) | |
tree | 992c967b6e97d1793e15adfe32bda95b67b9c8f1 /lib/strncasecmp.c | |
parent | da6ced865126d933c839f19ce9dd002b71d1d5a3 (diff) | |
download | coreutils-eba2793d1131e5c03d6357d5a727120340836e8f.tar.xz |
Nontrivial sync from gnulib.
Diffstat (limited to 'lib/strncasecmp.c')
-rw-r--r-- | lib/strncasecmp.c | 60 |
1 files changed, 58 insertions, 2 deletions
diff --git a/lib/strncasecmp.c b/lib/strncasecmp.c index 68d95aacc..72ead013b 100644 --- a/lib/strncasecmp.c +++ b/lib/strncasecmp.c @@ -1,2 +1,58 @@ -#define LENGTH_LIMIT -#include "strcasecmp.c" +/* strncasecmp.c -- case insensitive string comparator + Copyright (C) 1998, 1999 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software Foundation, + Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +/* Specification. */ +#include "strcase.h" + +#include <ctype.h> + +#define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch)) + +/* Compare no more than N bytes of strings S1 and S2, + ignoring case, returning less than, equal to or + greater than zero if S1 is lexicographically less + than, equal to or greater than S2. */ + +int +strncasecmp (const char *s1, const char *s2, size_t n) +{ + register const unsigned char *p1 = (const unsigned char *) s1; + register const unsigned char *p2 = (const unsigned char *) s2; + unsigned char c1, c2; + + if (p1 == p2 || n == 0) + return 0; + + do + { + c1 = TOLOWER (*p1); + c2 = TOLOWER (*p2); + + if (--n == 0 || c1 == '\0') + break; + + ++p1; + ++p2; + } + while (c1 == c2); + + return c1 - c2; +} |