return new byte[0];
    }
    byte[] result = bufs.remove();
    if (result.length == totalLen) {
      return result;
    }
    int remaining = totalLen - result.length;
    result = Arrays.copyOf(result, totalLen);
    while (remaining > 0) {
      byte[] buf = bufs.remove();
      int bytesToCopy = min(remaining, buf.length);
      int resultOffset = totalLen - remaining;

		s           string
		startIdx    int
		length      int
		resExpected string
		errExpected error
	}{
		{"abcd", 1, 1, "a", nil},
		{"abcd", -1, 1, "a", nil},
		{"abcd", 999, 999, "", nil},
		{"", 999, 999, "", nil},
		{"测试abc", 1, 1, "测", nil},
		{"测试abc", 5, 5, "c", nil},
	}

	for i, tc := range evalCases {
		res, err := evalSQLSubstring(tc.s, tc.startIdx, tc.length)
		if res != tc.resExpected || err != tc.errExpected {

						Name:     "gnu-sparse",
						Size:     6e10,
						SparseHoles: []sparseEntry{
							{Offset: 0e10, Length: 1e10 - 100},
							{Offset: 1e10, Length: 1e10 - 100},
							{Offset: 2e10, Length: 1e10 - 100},
							{Offset: 3e10, Length: 1e10 - 100},
							{Offset: 4e10, Length: 1e10 - 100},
							{Offset: 5e10, Length: 1e10 - 100},
						},
					}, nil},
					testReadFrom{fileOps{
						int64(1e10 - blockSize),

  }

  @Override
  @CanIgnoreReturnValue
  public Hasher putBytes(byte[] bytes) {
    return putBytes(bytes, 0, bytes.length);
  }

  @Override
  @CanIgnoreReturnValue
  public Hasher putBytes(byte[] bytes, int off, int len) {
    Preconditions.checkPositionIndexes(off, off + len, bytes.length);
    for (int i = 0; i < len; i++) {
      putByte(bytes[off + i]);
    }
    return this;
  }

  @Override

    byte[] md5Hash = Hashing.md5().hashLong(42L).asBytes();
    byte[] murmur3Hash = Hashing.murmur3_32().hashLong(42L).asBytes();
    byte[] combined = new byte[md5Hash.length + murmur3Hash.length];
    ByteBuffer buffer = ByteBuffer.wrap(combined);
    buffer.put(md5Hash);
    buffer.put(murmur3Hash);
    HashCode expected = HashCode.fromBytes(combined);

    assertEquals(

    }

    @Override
    public K[] createKeyArray(int length) {
      return ((TestMapGenerator<K, V>) mapGenerator.getInnerGenerator()).createKeyArray(length);
    }

    @Override
    public V[] createValueArray(int length) {
      return ((TestMapGenerator<K, V>) mapGenerator.getInnerGenerator()).createValueArray(length);
    }
  }

        cipher.init(Cipher.DECRYPT_MODE, sk, params);

        byte[] result;
        result = cipher.doFinal(data);

        decrypt = new byte[result.length];
        System.arraycopy(result, 0, decrypt, 0, result.length);

        int tempSize = decrypt.length - 24;

        byte[] output = new byte[tempSize];
        System.arraycopy(decrypt, 24, output, 0, tempSize);

        decrypt = output;

        sb.append(dm).append(targetLabel);
        sb.append(dm).append(targetRole);
        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

        sb.append(dm).append(errorName);
        sb.append(dm).append(lastAccessTime);
        sb.append(dm).append(threadName);
        sb.append(dm).append(url);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================

        sb.append(dm).append(term);
        sb.append(dm).append(updatedBy);
        sb.append(dm).append(updatedTime);
        sb.append(dm).append(virtualHost);
        if (sb.length() > dm.length()) {
            sb.delete(0, dm.length());
        }
        sb.insert(0, "{").append("}");
        return sb.toString();
    }

    // ===================================================================================