gambas-source-code/main/lib/data/string_compare.h

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/***************************************************************************
gb_common_string_temp.h
(c) 2000-2013 Benoît Minisini <gambas@users.sourceforge.net>
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.
***************************************************************************/
#include "gambas.h"
int STRING_compare(const char *str1, int len1, const char *str2, int len2)
{
uint i;
int len = len1 < len2 ? len1 : len2;
int diff;
register unsigned char c1, c2;
for (i = 0; i < len; i++)
{
c1 = str1[i];
c2 = str2[i];
if (LIKELY(c1 > c2)) return 1;
if (LIKELY(c1 < c2)) return -1;
}
diff = len1 - len2;
return LIKELY(diff < 0) ? (-1) : LIKELY(diff > 0) ? 1 : 0;
}