90 lines
2.7 KiB
C#
90 lines
2.7 KiB
C#
using Sick.SafetyScanners.DataStructures;
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using Sick.SafetyScanners.Helpers;
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using System.Text;
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namespace Sick.SafetyScanners.DataProcessing;
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/// <summary>
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/// Parser for UserName response from COLA2 variable command
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/// Thread-safe implementation
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/// </summary>
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public sealed class ParseUserName
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{
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/// <summary>
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/// Parses the user name from a TCP sequence (COLA2 response)
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/// Matches: ParseUserNameData::parseTCPSequence in C++
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/// </summary>
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public UserName ParseTcpSequence(PacketBuffer buffer)
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{
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var span = buffer.GetBufferSpan();
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return new UserName
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{
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VersionCVersion = ReadVersionIndicator(span),
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VersionMajorVersionNumber = ReadMajorNumber(span),
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VersionMinorVersionNumber = ReadMinorNumber(span),
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VersionReleaseNumber = ReadReleaseNumber(span),
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NameLength = ReadNameLength(span),
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Name = ReadUserName(span)
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};
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}
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/// <summary>
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/// Matches: ParseUserNameData::readVersionIndicator in C++
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/// </summary>
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private string ReadVersionIndicator(ReadOnlySpan<byte> span)
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{
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byte ch = ReadWriteHelper.ReadUint8(span, 0);
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return ((char)ch).ToString();
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}
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/// <summary>
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/// Matches: ParseUserNameData::readMajorNumber in C++
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/// </summary>
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private byte ReadMajorNumber(ReadOnlySpan<byte> span)
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{
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return ReadWriteHelper.ReadUint8(span, 1);
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}
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/// <summary>
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/// Matches: ParseUserNameData::readMinorNumber in C++
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/// </summary>
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private byte ReadMinorNumber(ReadOnlySpan<byte> span)
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{
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return ReadWriteHelper.ReadUint8(span, 2);
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}
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/// <summary>
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/// Matches: ParseUserNameData::readReleaseNumber in C++
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/// </summary>
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private byte ReadReleaseNumber(ReadOnlySpan<byte> span)
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{
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return ReadWriteHelper.ReadUint8(span, 3);
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}
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/// <summary>
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/// Matches: ParseUserNameData::readNameLength in C++
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/// </summary>
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private uint ReadNameLength(ReadOnlySpan<byte> span)
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{
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return ReadWriteHelper.ReadUint32LittleEndian(span, 4);
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}
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/// <summary>
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/// Matches: ParseUserNameData::readUserName in C++
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/// </summary>
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private string ReadUserName(ReadOnlySpan<byte> span)
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{
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uint nameLength = ReadWriteHelper.ReadUint32LittleEndian(span, 4);
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var nameBuilder = new StringBuilder((int)nameLength);
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for (uint i = 0; i < nameLength; i++)
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{
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byte ch = ReadWriteHelper.ReadUint8(span, 8 + (int)i);
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nameBuilder.Append((char)ch);
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}
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return nameBuilder.ToString();
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}
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}
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