zipflinger/src/com/android/zipflinger/Crc32.java

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.zipflinger;

import com.android.annotations.NonNull;
import java.util.zip.CRC32;

class Crc32 {

    public static int crc32(@NonNull byte[] bytes) {
        return crc32(bytes, 0, bytes.length);
    }

    public static int crc32(@NonNull byte[] bytes, int offset, int size) {
        CRC32 crc = new CRC32();
        crc.update(bytes, offset, size);
        return Ints.longToUint(crc.getValue());
    }

    private Crc32() {}
}