Mercurial > gnulib
view lib/memcasecmp.c @ 12559:c2cbabec01dd
update nearly all FSF copyright year lists to include 2010
Use the same procedure as for 2009, outlined in
http://thread.gmane.org/gmane.comp.lib.gnulib.bugs/20081
author | Jim Meyering <meyering@redhat.com> |
---|---|
date | Fri, 01 Jan 2010 10:31:12 +0100 |
parents | b5e42ef33b49 |
children | 97fc9a21a8fb |
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/* Case-insensitive buffer comparator. Copyright (C) 1996-1997, 2000, 2003, 2006, 2009-2010 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 3 of the License, 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, see <http://www.gnu.org/licenses/>. */ /* Written by Jim Meyering. */ #include <config.h> #include "memcasecmp.h" #include <ctype.h> #include <limits.h> /* Like memcmp, but ignore differences in case. Convert to upper case (not lower) before comparing so that join -i works with sort -f. */ int memcasecmp (const void *vs1, const void *vs2, size_t n) { size_t i; char const *s1 = vs1; char const *s2 = vs2; for (i = 0; i < n; i++) { unsigned char u1 = s1[i]; unsigned char u2 = s2[i]; int U1 = toupper (u1); int U2 = toupper (u2); int diff = (UCHAR_MAX <= INT_MAX ? U1 - U2 : U1 < U2 ? -1 : U2 < U1); if (diff) return diff; } return 0; }