Files
aistudio-wpf-diagram/zxing.core/xx/oned/UPCEANExtensionSupport.cs
2021-07-23 09:42:22 +08:00

39 lines
1.4 KiB
C#

/*
* Copyright (C) 2010 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 ZXing.Common;
namespace ZXing.OneD
{
sealed class UPCEANExtensionSupport
{
private static readonly int[] EXTENSION_START_PATTERN = { 1, 1, 2 };
private readonly UPCEANExtension2Support twoSupport = new UPCEANExtension2Support();
private readonly UPCEANExtension5Support fiveSupport = new UPCEANExtension5Support();
internal Result decodeRow(int rowNumber, BitArray row, int rowOffset)
{
int[] extensionStartRange = UPCEANReader.findGuardPattern(row, rowOffset, false, EXTENSION_START_PATTERN);
if (extensionStartRange == null)
return null;
var result = fiveSupport.decodeRow(rowNumber, row, extensionStartRange);
if (result == null)
result = twoSupport.decodeRow(rowNumber, row, extensionStartRange);
return result;
}
}
}