/**
*
* Copyright (c) 2014, the Railo Company Ltd. All rights reserved.
*
* 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. If not, see <http://www.gnu.org/licenses/>.
*
**/
/**
* Implements the CFML Function bitmaskset
*/
package lucee.runtime.functions.math;
import lucee.runtime.PageContext;
import lucee.runtime.exp.FunctionException;
import lucee.runtime.ext.function.Function;
public final class BitMaskSet implements Function {
public static double call(PageContext pc , double dnumber, double dmask, double dstart, double dlength) throws FunctionException {
int number=(int)dnumber, mask=(int)dmask, start=(int)dstart, length=(int)dlength;
if(start > 31 || start < 0)
throw new FunctionException(pc,"bitMaskSet",2,"start","must be beetween 0 and 31 now "+start);
if(length > 31 || length < 0)
throw new FunctionException(pc,"bitMaskSet",3,"length","must be beetween 0 and 31 now "+length);
int tmp = (1 << length) - 1 << start;
mask &= (1 << length) - 1;
return number & ~tmp | mask << start;
}
}