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/* GSFunctions.c
Copyright (C) 2011 Free Software Foundation, Inc.
Written by: Stefan Bidigaray
Date: April, 2012
This file is part of the GNUstep CoreBase Library.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; see the file COPYING.LIB.
If not, see <http://www.gnu.org/licenses/> or write to the
Free Software Foundation, 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301, USA.
*/
#include "GSPrivate.h"
CFIndex
GSBSearch (const void *array, const void *key, CFRange range, CFIndex size,
CFComparatorFunction comp, void *ctxt)
{
CFIndex min;
CFIndex mid;
CFIndex max;
const void *cur;
min = range.location;
max = min + range.length;
while (max > min)
{
CFComparisonResult r;
mid = (min + max) >> 1;
cur = ((const UInt8*)array) + (mid * size);
r = comp (key, cur, ctxt);
if (r == kCFCompareLessThan)
{
max = mid - 1;
}
else if (r == kCFCompareGreaterThan)
{
min = mid + 1;
}
else
{
min = mid + 1;
break;
}
}
return min - 1;
}
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