/*
 * This is free and unencumbered software released into the public domain.
 *
 * Anyone is free to copy, modify, publish, use, compile, sell, or
 * distribute this software, either in source code form or as a compiled
 * binary, for any purpose, commercial or non-commercial, and by any
 * means.
 *
 * In jurisdictions that recognize copyright laws, the author or authors
 * of this software dedicate any and all copyright interest in the
 * software to the public domain. We make this dedication for the benefit
 * of the public at large and to the detriment of our heirs and
 * successors. We intend this dedication to be an overt act of
 * relinquishment in perpetuity of all present and future rights to this
 * software under copyright law.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 *
 * For more information, please refer to <http://unlicense.org/>
 */
package jxtn.core.unix;

import java.nio.ByteBuffer;

final class ByteArrays {

    public static byte[] copy(ByteBuffer buffer) {
        byte[] dst = new byte[buffer.remaining()];
        System.arraycopy(buffer.array(), buffer.arrayOffset() + buffer.position(), dst, 0, buffer.remaining());
        return dst;
    }

    public static int indexOf(byte[] source, int sourceOffset, byte ch) {
        return indexOf(source, sourceOffset, source.length - sourceOffset, ch);
    }

    public static int indexOf(byte[] source, int sourceOffset, int sourceCount, byte ch) {
        for (int i = sourceOffset; i < sourceOffset + sourceCount; i++) {
            if (source[i] == ch) {
                return i;
            }
        }
        return -1;
    }

    public static int lastIndexOf(byte[] source, int sourceOffset, int sourceCount, byte ch) {
        int i = sourceOffset + sourceCount - 1;
        for (; i >= sourceOffset; i--) {
            if (source[i] == ch) {
                return i;
            }
        }
        return -1;
    }

}