private string GetName(byte[] data, ref int pointer)
{
var name = new StringBuilder();
while (data[pointer] < 192 && data[pointer] != 0)
{
var length = data[pointer];
for (int i = pointer + 1; i <= pointer + length; i++)
{
name.Append(Convert.ToChar(data[i]));
}
pointer += length + 1;
}
if (data[pointer] == 0)
{
pointer++;
return(name.ToString());
}
var p = MyBitConverter.ToUInt16(data, ref pointer);
CompressionPointer = p;
var offset = GetOffset(p);
return(name + GetName(data, ref offset));
}
public Record(byte[] data, int pointer, bool isQuestion = false)
{
var previousePointer = pointer;
Name = GetName(data, ref pointer);
QType = MyBitConverter.ToUInt16(data, ref pointer);
if (!availableTypes.Contains(QType))
{
throw new Exception($"Incorrect type {QType}");
}
QClass = MyBitConverter.ToUInt16(data, ref pointer);
if (isQuestion)
{
LengthRecord = pointer - previousePointer;
Pointer = pointer;
return;
}
Ttl = MyBitConverter.ToUInt32(data, ref pointer);
DataLenght = MyBitConverter.ToUInt16(data, ref pointer);
PointerToData = (ushort)pointer;
Data = data.Skip(pointer).Take(DataLenght);
Pointer = pointer + DataLenght;
LengthRecord = Pointer - previousePointer;
}
private string GetName(int pointer, byte[] data)
{
var name = new StringBuilder();
while (data[pointer] < 192 && data[pointer] != 0)
{
var length = data[pointer];
for (int i = pointer + 1; i <= pointer + length; i++)
{
name.Append(Convert.ToChar(data[i]));
}
pointer += length + 1;
if (data[pointer] != 0)
{
name.Append(".");
}
}
if (data[pointer] == 0)
{
return(name.ToString());
}
var offset = MyBitConverter.ToUInt16(data, pointer) & 16383;
return(name + GetName(offset, data));
}
public ErrorPacket(byte[] data)
{
int offset = 0;
this.Header = MyBitConverter.ToUInt16(data, ref offset);
this.Len = data[offset++];
this.SerialNum = data[offset++];
this.Type = data[offset++];
this.AgvId = MyBitConverter.ToUInt16(data, ref offset);
this.IsCheckSumCorrect = ResponseState.Error;
}
public Header(byte[] data)
{
var pointer = 0;
Id = MyBitConverter.ToUInt16(data, ref pointer);
FrameFlags = new Flasg(MyBitConverter.ToUInt16(data, ref pointer));
QuestionCount = MyBitConverter.ToUInt16(data, ref pointer);
AnswerCount = MyBitConverter.ToUInt16(data, ref pointer);
NameServerCount = MyBitConverter.ToUInt16(data, ref pointer);
AdditionalCount = MyBitConverter.ToUInt16(data, ref pointer);
}
/// <summary>
/// Read sub image header.
/// </summary>
/// <param name="stream">Stream to read local header from.</param>
/// <param name="endianness">Big or little, as defined by TIFF header.</param>
public ImageFileDirectory(Stream stream, MyBitConverter.Endianness endianness) : this()
{
var bytes = stream.ReadBytes(2);
NumberOfEntries = MyBitConverter.ToUInt16(bytes, 0, endianness);
FieldDescriptors = new List <FieldDescriptor>();
for (int i = 0; i < NumberOfEntries; i++)
{
bytes = stream.ReadBytes(12);
FieldDescriptors.Add(new FieldDescriptor(bytes, endianness, stream));
}
}
/// <summary>
/// 初始化父类中的成员数据
/// </summary>
/// <param name="ClassTpye">子类的名称</param>
/// <param name="data">数据</param>
protected ReceiveBasePacket(string ClassTpye, byte[] data)
{
if (data == null || data.Length < NeedLen())
{
throw new PacketException(ClassTpye, ExceptionCode.DataMiss);
}
if (data[NeedLen() - 1] != CaculateCheckSum(data))
{
throw new PacketException(ClassTpye, ExceptionCode.CheckSumError);
}
int offset = 0;
this.Header = MyBitConverter.ToUInt16(data, ref offset);
this.Len = data[offset++];
this.SerialNum = data[offset++];
this.Type = data[offset++];
this.AgvId = MyBitConverter.ToUInt16(data, ref offset);
this.CheckSum = data[NeedLen() - 1];
}
