content: /*
   * Copyright 2013 ZXing authors
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this 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.
   */
  
  package com.ailiwean.core.zxing.core.aztec.encoder;
  
  
  import com.ailiwean.core.zxing.core.common.BitArray;
  
  final class BinaryShiftToken extends Token {
  
    private final short binaryShiftStart;
    private final short binaryShiftByteCount;
  
    BinaryShiftToken(Token previous,
                     int binaryShiftStart,
                     int binaryShiftByteCount) {
      super(previous);
      this.binaryShiftStart = (short) binaryShiftStart;
      this.binaryShiftByteCount = (short) binaryShiftByteCount;
    }
  
    @Override
    public void appendTo(BitArray bitArray, byte[] text) {
      for (int i = 0; i < binaryShiftByteCount; i++) {
        if (i == 0 || (i == 31 && binaryShiftByteCount <= 62)) {
          // We need a header before the first character, and before
          // character 31 when the total byte code is <= 62
          bitArray.appendBits(31, 5);  // BINARY_SHIFT
          if (binaryShiftByteCount > 62) {
            bitArray.appendBits(binaryShiftByteCount - 31, 16);
          } else if (i == 0) {
            // 1 <= binaryShiftByteCode <= 62
            bitArray.appendBits(Math.min(binaryShiftByteCount, 31), 5);
          } else {
            // 32 <= binaryShiftCount <= 62 and i == 31
            bitArray.appendBits(binaryShiftByteCount - 31, 5);
          }
        }
        bitArray.appendBits(text[binaryShiftStart + i], 8);
      }
    }
  
    @Override
    public String toString() {
      return "<" + binaryShiftStart + "::" + (binaryShiftStart + binaryShiftByteCount - 1) + '>';
    }
  
  }
  