TheXamlGuy
63 lines
2.0 KiB
C#
63 lines
2.0 KiB
C#
using System;
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using Gma.QrCodeNet.Encoding.DataEncodation.InputRecognition;
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using Gma.QrCodeNet.Encoding.Terminate;
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using Gma.QrCodeNet.Encoding.Versions;
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namespace Gma.QrCodeNet.Encoding.DataEncodation;
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/// <remarks>ISO/IEC 18004:2000 Chapter 8.1 Page 14
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/// DataEncode is combination of Data analysis and Data encodation step.
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/// Which uses sub functions under several different namespaces</remarks>
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internal static class DataEncode
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{
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internal static EncodationStruct Encode(string content, ErrorCorrectionLevel ecLevel)
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{
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RecognitionStruct recognitionResult = InputRecognise.Recognise(content);
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EncoderBase encoderBase = CreateEncoder(recognitionResult.EncodingName);
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BitList encodeContent = encoderBase.GetDataBits(content);
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int encodeContentLength = encodeContent.Count;
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VersionControlStruct vcStruct =
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VersionControl.InitialSetup(encodeContentLength, ecLevel, recognitionResult.EncodingName);
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BitList dataCodewords = new();
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// Eci header
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if (vcStruct.IsContainECI && vcStruct.ECIHeader is { })
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{
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dataCodewords.Add(vcStruct.ECIHeader);
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}
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// Header
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dataCodewords.Add(encoderBase.GetModeIndicator());
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int numLetter = encodeContentLength >> 3;
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dataCodewords.Add(encoderBase.GetCharCountIndicator(numLetter, vcStruct.VersionDetail.Version));
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// Data
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dataCodewords.Add(encodeContent);
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// Terminator Padding
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dataCodewords.TerminateBites(dataCodewords.Count, vcStruct.VersionDetail.NumDataBytes);
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int dataCodewordsCount = dataCodewords.Count;
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if ((dataCodewordsCount & 0x7) != 0)
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{
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throw new ArgumentException($"{nameof(dataCodewords)} is not byte sized.");
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}
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else if (dataCodewordsCount >> 3 != vcStruct.VersionDetail.NumDataBytes)
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{
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throw new ArgumentException($"{nameof(dataCodewords)} num of bytes not equal to {nameof(vcStruct.VersionDetail.NumDataBytes)} for current version");
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}
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var encStruct = new EncodationStruct(vcStruct, dataCodewords);
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return encStruct;
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}
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private static EncoderBase CreateEncoder(string encodingName)
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{
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return new EightBitByteEncoder(encodingName);
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}
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}
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