Toolkit.UI.Controls.Avalonia

2024-04-13 11:41:33 +01:00
parent 62a7e94e19
commit 862e7b2e34
97 changed files with 8558 additions and 0 deletions
@@ -0,0 +1,73 @@
+using System;
+
+namespace Gma.QrCodeNet.Encoding.Terminate;
+
+internal static class Terminator
+{
+	private const int NumBitsForByte = 8;
+
+	/// <summary>
+	/// This method will create BitList that contains
+	/// terminator, padding and pad codewords for given datacodewords.
+	/// Use it to full fill the data codewords capacity. Thus avoid massive empty bits.
+	/// </summary>
+	/// <remarks>ISO/IEC 18004:2006 P. 32 33.
+	/// Terminator / Bit stream to codeword conversion</remarks>
+	/// <param name="baseList">Method will add terminator bits (Terminator, padding and padcodewords) at end of baseList</param>
+	/// <param name="dataCount">Num of bits for datacodewords without terminator</param>
+	/// <param name="numTotalDataCodewords">Total number of datacodewords for specific version.
+	/// Receive it under Version/VersionTable</param>
+	internal static void TerminateBites(this BitList baseList, int dataCount, int numTotalDataCodewords)
+	{
+		int numTotalDataBits = numTotalDataCodewords << 3;
+		int numDataBits = dataCount;
+
+		int numFillerBits = numTotalDataBits - numDataBits;
+		int numBitsNeedForLastByte = numFillerBits & 0x7;
+		int numFillerBytes = numFillerBits >> 3;
+
+		// BitList result = new BitList();
+		if (numBitsNeedForLastByte >= QRCodeConstantVariable.TerminatorLength)
+		{
+			baseList.TerminatorPadding(numBitsNeedForLastByte);
+			baseList.PadeCodewords(numFillerBytes);
+		}
+		else if (numFillerBytes == 0)
+		{
+			baseList.TerminatorPadding(numBitsNeedForLastByte);
+		}
+		else if (numFillerBytes > 0)
+		{
+			baseList.TerminatorPadding(numBitsNeedForLastByte + NumBitsForByte);
+			baseList.PadeCodewords(numFillerBytes - 1);
+		}
+
+		if (baseList.Count != numTotalDataBits)
+		{
+			throw new ArgumentException(
+				$"Generate terminator and Padding fail. Num of bits need: {numFillerBytes}. Actual length: {baseList.Count - numDataBits}");
+		}
+	}
+
+	private static void PadeCodewords(this BitList mainList, int numOfPadeCodewords)
+	{
+		if (numOfPadeCodewords < 0)
+		{
+			throw new ArgumentException("Num of pade codewords is less than Zero");
+		}
+
+		for (int numOfP = 1; numOfP <= numOfPadeCodewords; numOfP++)
+		{
+			if (numOfP % 2 == 1)
+			{
+				mainList.Add(QRCodeConstantVariable.PadeCodewordsOdd, NumBitsForByte);
+			}
+			else
+			{
+				mainList.Add(QRCodeConstantVariable.PadeCodewordsEven, NumBitsForByte);
+			}
+		}
+	}
+
+	private static void TerminatorPadding(this BitList mainList, int numBits) => mainList.Add(QRCodeConstantVariable.TerminatorNPaddingBit, numBits);
+}