client-mr/core/src/main/java/org/apache/hadoop/mapred/SortWriteBuffer.java [174:201]:
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  private int writeDataInt(byte[] data, int offset, long dataInt) {
    if (dataInt >= -112L && dataInt <= 127L) {
      data[offset] = (byte) ((int) dataInt);
      offset++;
    } else {
      int len = -112;
      if (dataInt < 0L) {
        dataInt = ~dataInt;
        len = -120;
      }

      for (long tmp = dataInt; tmp != 0L; --len) {
        tmp >>= 8;
      }

      data[offset] = (byte) len;
      offset++;
      len = len < -120 ? -(len + 120) : -(len + 112);

      for (int idx = len; idx != 0; --idx) {
        int shiftBits = (idx - 1) * 8;
        long mask = 255L << shiftBits;
        data[offset] = ((byte) ((int) ((dataInt & mask) >> shiftBits)));
        offset++;
      }
    }
    return offset;
  }
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client-tez/src/main/java/org/apache/tez/runtime/library/common/sort/buffer/WriteBuffer.java [242:266]:
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  private int writeDataInt(byte[] data, int offset, long dataInt) {
    if (dataInt >= -112L && dataInt <= 127L) {
      data[offset] = (byte) ((int) dataInt);
      offset++;
    } else {
      int len = -112;
      if (dataInt < 0L) {
        dataInt = ~dataInt;
        len = -120;
      }
      for (long tmp = dataInt; tmp != 0L; --len) {
        tmp >>= 8;
      }
      data[offset] = (byte) len;
      offset++;
      len = len < -120 ? -(len + 120) : -(len + 112);
      for (int idx = len; idx != 0; --idx) {
        int shiftBits = (idx - 1) * 8;
        long mask = 255L << shiftBits;
        data[offset] = ((byte) ((int) ((dataInt & mask) >> shiftBits)));
        offset++;
      }
    }
    return offset;
  }
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