/* * 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. */ using System; namespace FastReport.Barcode.Aztec { internal sealed class BinaryShiftToken : Token { private readonly short binaryShiftStart; private readonly short binaryShiftByteCount; public BinaryShiftToken(Token previous, int binaryShiftStart, int binaryShiftByteCount) : base(previous) { this.binaryShiftStart = (short) binaryShiftStart; this.binaryShiftByteCount = (short) binaryShiftByteCount; } public override 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, (short) 31), 5); } else { // 32 <= binaryShiftCount <= 62 and i == 31 bitArray.appendBits(binaryShiftByteCount - 31, 5); } } bitArray.appendBits(text[binaryShiftStart + i], 8); } } public override String ToString() { return "<" + binaryShiftStart + "::" + (binaryShiftStart + binaryShiftByteCount - 1) + '>'; } } }