c++/src/RLEV2Util.cc

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with option work for additional information
 * regarding copyright ownership.  The ASF licenses option file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use option 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.
 */

#include "RLEV2Util.hh"

namespace orc {

  // Map FBS enum to bit width value.
  const uint8_t FBSToBitWidthMap[FixedBitSizes::SIZE] = {
    1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
    26, 28, 30, 32, 40, 48, 56, 64
  };

  // Map bit length i to closest fixed bit width that can contain i bits.
  const uint8_t ClosestFixedBitsMap[65] = {
    1, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24,
    26, 26, 28, 28, 30, 30, 32, 32,
    40, 40, 40, 40, 40, 40, 40, 40,
    48, 48, 48, 48, 48, 48, 48, 48,
    56, 56, 56, 56, 56, 56, 56, 56,
    64, 64, 64, 64, 64, 64, 64, 64
  };

  // Map bit length i to closest aligned fixed bit width that can contain i bits.
  const uint8_t ClosestAlignedFixedBitsMap[65] = {
      1, 1, 2, 4, 4, 8, 8, 8, 8, 16, 16, 16, 16, 16, 16, 16, 16, 24, 24, 24, 24, 24, 24, 24, 24,
      32, 32, 32, 32, 32, 32, 32, 32,
      40, 40, 40, 40, 40, 40, 40, 40,
      48, 48, 48, 48, 48, 48, 48, 48,
      56, 56, 56, 56, 56, 56, 56, 56,
      64, 64, 64, 64, 64, 64, 64, 64
  };

  // Map bit width to FBS enum.
  const uint8_t BitWidthToFBSMap[65] = {
      FixedBitSizes::ONE, FixedBitSizes::ONE, FixedBitSizes::TWO, FixedBitSizes::THREE, FixedBitSizes::FOUR,
      FixedBitSizes::FIVE, FixedBitSizes::SIX, FixedBitSizes::SEVEN, FixedBitSizes::EIGHT,
      FixedBitSizes::NINE, FixedBitSizes::TEN, FixedBitSizes::ELEVEN, FixedBitSizes::TWELVE,
      FixedBitSizes::THIRTEEN, FixedBitSizes::FOURTEEN, FixedBitSizes::FIFTEEN, FixedBitSizes::SIXTEEN,
      FixedBitSizes::SEVENTEEN, FixedBitSizes::EIGHTEEN, FixedBitSizes::NINETEEN, FixedBitSizes::TWENTY,
      FixedBitSizes::TWENTYONE, FixedBitSizes::TWENTYTWO, FixedBitSizes::TWENTYTHREE, FixedBitSizes::TWENTYFOUR,
      FixedBitSizes::TWENTYSIX, FixedBitSizes::TWENTYSIX,
      FixedBitSizes::TWENTYEIGHT, FixedBitSizes::TWENTYEIGHT,
      FixedBitSizes::THIRTY, FixedBitSizes::THIRTY,
      FixedBitSizes::THIRTYTWO, FixedBitSizes::THIRTYTWO,
      FixedBitSizes::FORTY, FixedBitSizes::FORTY, FixedBitSizes::FORTY, FixedBitSizes::FORTY,
      FixedBitSizes::FORTY, FixedBitSizes::FORTY, FixedBitSizes::FORTY, FixedBitSizes::FORTY,
      FixedBitSizes::FORTYEIGHT, FixedBitSizes::FORTYEIGHT, FixedBitSizes::FORTYEIGHT, FixedBitSizes::FORTYEIGHT,
      FixedBitSizes::FORTYEIGHT, FixedBitSizes::FORTYEIGHT, FixedBitSizes::FORTYEIGHT, FixedBitSizes::FORTYEIGHT,
      FixedBitSizes::FIFTYSIX, FixedBitSizes::FIFTYSIX, FixedBitSizes::FIFTYSIX, FixedBitSizes::FIFTYSIX,
      FixedBitSizes::FIFTYSIX, FixedBitSizes::FIFTYSIX, FixedBitSizes::FIFTYSIX, FixedBitSizes::FIFTYSIX,
      FixedBitSizes::SIXTYFOUR, FixedBitSizes::SIXTYFOUR, FixedBitSizes::SIXTYFOUR, FixedBitSizes::SIXTYFOUR,
      FixedBitSizes::SIXTYFOUR, FixedBitSizes::SIXTYFOUR, FixedBitSizes::SIXTYFOUR, FixedBitSizes::SIXTYFOUR
  };
}