import jcifs.internal.util.SMBUtil;

/**
 * SMB2 SRV_COPYCHUNK data structure. This structure represents a single chunk specification
 * for server-side copy operations.
 *
 * @author mbechler
 *
 */
public class SrvCopychunk implements Encodable {

    private final long sourceOffset;
    private final long targetOffset;
    private final int length;

    /**
     * Constructs a server copy chunk descriptor

        void testMultipleSequentialEncodings() {
            // Given
            SrvCopychunk chunk1 = new SrvCopychunk(100, 200, 300);
            SrvCopychunk chunk2 = new SrvCopychunk(400, 500, 600);
            SrvCopychunk chunk3 = new SrvCopychunk(700, 800, 900);
            byte[] buffer = new byte[EXPECTED_SIZE * 3];

            // When

            SrvCopychunk[] testCases = { new SrvCopychunk(1, 2, 3), new SrvCopychunk(4, 5, 6), new SrvCopychunk(7, 8, 9),
                    new SrvCopychunk(10, 11, 12), new SrvCopychunk(13, 14, 15) };

            for (int numChunks = 0; numChunks <= testCases.length; numChunks++) {
                // Create copy with varying number of chunks
                SrvCopychunk[] chunks = Arrays.copyOf(testCases, numChunks);

    private final byte[] sourceKey;
    private final SrvCopychunk[] chunks;

    /**
     * Constructs a server copy chunk operation request
     * @param sourceKey the resume key identifying the source file
     * @param chunks the array of copy chunk descriptors
     */
    public SrvCopychunkCopy(final byte[] sourceKey, final SrvCopychunk... chunks) {
        this.sourceKey = sourceKey;
        this.chunks = chunks;

                        final SrvCopychunk[] chunkInfo = new SrvCopychunk[chunks];
                        long ioff = 0;
                        for (int i = 0; i < chunks; i++) {
                            final long absoff = ooff + ioff;
                            final int csize = i == chunks - 1 ? lastChunkSize : maxChunkSize;
                            chunkInfo[i] = new SrvCopychunk(absoff, absoff, csize);