/*

 * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code 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

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

package com.sun.crypto.provider;

import java.util.List;

import java.util.function.BiFunction;

import java.security.*;

/**

 * This class holds the various utility methods for range checks.

 */

final class RangeUtil {

    private static final BiFunction<String, List<Integer>,

            ArrayIndexOutOfBoundsException> AIOOBE_SUPPLIER =

            Preconditions.outOfBoundsExceptionFormatter

            (ArrayIndexOutOfBoundsException::new);

    public static void blockSizeCheck(int len, int blockSize) {

        if ((len % blockSize) != 0) {

            throw new ProviderException("Internal error in input buffering");

        }

    }

    public static void nullAndBoundsCheck(byte[] array, int offset, int len) {

        // NPE is thrown when array is null

        Preconditions.checkFromIndexSize(offset, len, array.length, AIOOBE_SUPPLIER);

    }

}