| /* |
| * Copyright 2008 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.google.zxing.oned; |
| |
| import com.google.zxing.BarcodeFormat; |
| import com.google.zxing.NotFoundException; |
| import com.google.zxing.common.BitArray; |
| |
| /** |
| * <p>Implements decoding of the EAN-8 format.</p> |
| * |
| * @author Sean Owen |
| */ |
| public final class EAN8Reader extends UPCEANReader { |
| |
| private final int[] decodeMiddleCounters; |
| |
| public EAN8Reader() { |
| decodeMiddleCounters = new int[4]; |
| } |
| |
| @Override |
| protected int decodeMiddle(BitArray row, |
| int[] startRange, |
| StringBuilder result) throws NotFoundException { |
| int[] counters = decodeMiddleCounters; |
| counters[0] = 0; |
| counters[1] = 0; |
| counters[2] = 0; |
| counters[3] = 0; |
| int end = row.getSize(); |
| int rowOffset = startRange[1]; |
| |
| for (int x = 0; x < 4 && rowOffset < end; x++) { |
| int bestMatch = decodeDigit(row, counters, rowOffset, L_PATTERNS); |
| result.append((char) ('0' + bestMatch)); |
| for (int counter : counters) { |
| rowOffset += counter; |
| } |
| } |
| |
| int[] middleRange = findGuardPattern(row, rowOffset, true, MIDDLE_PATTERN); |
| rowOffset = middleRange[1]; |
| |
| for (int x = 0; x < 4 && rowOffset < end; x++) { |
| int bestMatch = decodeDigit(row, counters, rowOffset, L_PATTERNS); |
| result.append((char) ('0' + bestMatch)); |
| for (int counter : counters) { |
| rowOffset += counter; |
| } |
| } |
| |
| return rowOffset; |
| } |
| |
| @Override |
| BarcodeFormat getBarcodeFormat() { |
| return BarcodeFormat.EAN_8; |
| } |
| |
| } |