Public Class BigEndianReader
Implements IDataReader
Implements IDisposable
#Region "Properties"
Private m_reader As BinaryReader
Public ReadOnly Property BytesAvailable() As Long Implements IDataReader.BytesAvailable
Get
Return m_reader.BaseStream.Length - m_reader.BaseStream.Position
End Get
End Property
Public ReadOnly Property Position As Long Implements IDataReader.Position
Get
Return m_reader.BaseStream.Position
End Get
End Property
Public ReadOnly Property BaseStream() As Stream
Get
Return m_reader.BaseStream
End Get
End Property
#End Region
#Region "Initialisation"
Public Sub New()
m_reader = New BinaryReader(New MemoryStream(), Encoding.UTF8)
End Sub
Public Sub New(stream As Stream)
m_reader = New BinaryReader(stream, Encoding.UTF8)
End Sub
Public Sub New(tab As Byte())
m_reader = New BinaryReader(New MemoryStream(tab), Encoding.UTF8)
End Sub
#End Region
#Region "Private Methods"
''' <returns></returns>
Private Function ReadBigEndianBytes(count As Integer) As Byte()
Dim bytes(count) As Byte
For i As Integer = 0 To count - 1
bytes(i) = BaseStream.ReadByte()
Next
Return bytes
End Function
#End Region
Public Function CustomDataWrapper(param1)
Dim _data = param1
End Function
Public Function readUnsignedByte() As Integer
Return readUnsignedByte
End Function
#Region "Public Method"
Public Function ReadShort() As Short Implements IDataReader.ReadShort
Dim Value As UShort = ReadUInt16()
If Value > Short.MaxValue Then
Dim Value2 As Short = -(UShort.MaxValue - Value) - 1
Return Value2
End If
Return Value
End Function
Public Function ReadInt() As Integer Implements IDataReader.ReadInt
Dim Value As UInteger = ReadUInt32()
If Value > Integer.MaxValue Then
Dim Value2 As Integer = -(UInteger.MaxValue - Value) - 1
Return Value2
End If
Return Value
End Function
Public Function ReadLong() As Int64 Implements IDataReader.ReadLong
Return BitConverter.ToInt64(ReadBigEndianBytes(8), 0)
End Function
Public Function ReadFloat() As Single Implements IDataReader.ReadFloat
Return BitConverter.ToSingle(ReadBigEndianBytes(4), 0)
End Function
Public Function ReadUShort() As UShort Implements IDataReader.ReadUShort
Return (CUShort(ReadByte()) << 8) + ReadByte()
End Function
Public Function ReadUInt() As UInt32 Implements IDataReader.ReadUInt
Return (CUInt(ReadByte()) << 24) + (CUInt(ReadByte()) << 16) + (CUInt(ReadByte()) << 8) + ReadByte()
End Function
Public Function ReadULong() As UInt64 Implements IDataReader.ReadULong
Return BitConverter.ToUInt64(ReadBigEndianBytes(8), 0)
End Function
Public Function ReadByte() As Byte Implements IDataReader.ReadByte
Return m_reader.ReadByte()
End Function
Public Function ReadUnSignedshort()
Return ReadUInt16()
End Function
Public Function ReadSByte() As SByte Implements IDataReader.ReadSByte
Return m_reader.ReadSByte()
End Function
Public ReadOnly Property Data() As Byte()
Get
Dim pos As Long = BaseStream.Position
Dim data__1 As Byte() = New Byte(BaseStream.Length - 1) {}
BaseStream.Position = 0
BaseStream.Read(data__1, 0, CInt(BaseStream.Length))
BaseStream.Position = pos
Return data__1
End Get
End Property
Public Function ReadBytes(n As Integer) As Byte() Implements IDataReader.ReadBytes
Return m_reader.ReadBytes(n)
End Function
Public Function ReadBytesInNewBigEndianReader(n As Integer) As BigEndianReader
Return New BigEndianReader(m_reader.ReadBytes(n))
End Function
Public Function ReadBoolean() As [Boolean] Implements IDataReader.ReadBoolean
Return m_reader.ReadByte() = 1
End Function
Public Function ReadChar() As [Char] Implements IDataReader.ReadChar
Return ChrW(ReadUShort())
End Function
Public Function ReadDouble() As [Double] Implements IDataReader.ReadDouble
Dim Bytes() As Byte = ReadBytes(8)
Array.Reverse(Bytes)
Return BitConverter.ToDouble(Bytes, 0)
End Function
Public Function ReadSingle() As [Single]
Return BitConverter.ToSingle(ReadBigEndianBytes(4), 0)
End Function
Public Function ReadUTF() As String Implements IDataReader.ReadUTF
Dim length As UShort = ReadUShort()
Dim bytes As Byte() = ReadBytes(length)
Return Encoding.UTF8.GetString(bytes)
End Function
Public Function ReadUTF7BitLength() As String
Dim length As Integer = ReadInt()
Dim bytes As Byte() = ReadBytes(length)
Return Encoding.UTF8.GetString(bytes)
End Function
Public Function ReadUTFBytes(len As UShort) As String Implements IDataReader.ReadUTFBytes
Dim bytes As Byte() = ReadBytes(len)
Return Encoding.UTF8.GetString(bytes)
End Function
Public Sub SkipBytes(n As Integer) Implements IDataReader.SkipBytes
Dim i As Integer
For i = 0 To n - 1
m_reader.ReadByte()
Next
End Sub
Public Sub SetPosition(Position As Integer)
Seek(Position, SeekOrigin.Begin)
End Sub
Public Sub Seek(offset As Integer, seekOrigin As SeekOrigin) Implements IDataReader.Seek
m_reader.BaseStream.Seek(offset, seekOrigin)
End Sub
Public Sub Add(data As Byte(), offset As Integer, count As Integer)
Dim pos As Long = m_reader.BaseStream.Position
m_reader.BaseStream.Position = m_reader.BaseStream.Length
m_reader.BaseStream.Write(data, offset, count)
m_reader.BaseStream.Position = pos
End Sub
Public Sub Close()
BaseStream.Close()
End Sub
#End Region
#Region "Alternatives Methods"
Public Function ReadInt16() As Short
Return ReadShort()
End Function
Public Function ReadInt32() As Integer
Return ReadInt()
End Function
Public Function ReadInt64() As Long
Return ReadLong()
End Function
Public Function ReadUInt16() As UShort
Return ReadUShort()
End Function
Public Function ReadUInt32() As UInteger
Return ReadUInt()
End Function
Public Function ReadUInt64() As ULong
Return ReadULong()
End Function
Public Function ReadString() As String
Return ReadUTF()
End Function
#End Region
#Region "Custom Methods"
Private Const INT_SIZE As Integer = 32
Private Const SHORT_SIZE As Integer = 16
Private Const SHORT_MIN_VALUE As Integer = -32768
Private Const SHORT_MAX_VALUE As Integer = 32767
Private Const UNSIGNED_SHORT_MAX_VALUE As Integer = 65536
Private Const CHUNCK_BIT_SIZE As Integer = 7
Private Const MASK_10000000 As Integer = 128
Private Const MASK_01111111 As Integer = 127
Public Function ReadVarInt() As Integer Implements IDataReader.ReadVarInt
'rien'
Dim local_4 = 0
Dim local_1 = 0
Dim local_2 = 0
Dim local_3 = False
While local_2 < INT_SIZE
local_4 = Me.ReadByte()
local_3 = (local_4 And MASK_10000000) = MASK_10000000
If local_2 > 0 Then
local_1 = local_1 + ((local_4 And MASK_01111111) << local_2)
Else
local_1 += (local_4 And MASK_01111111)
End If
local_2 += CHUNCK_BIT_SIZE
If Not local_3 Then
Return local_1
End If
End While
Throw New System.Exception("Too much data")
End Function
Public Function ReadVarUhInt() As UInteger Implements IDataReader.ReadVarUhInt
Return CUInt(ReadVarInt())
End Function
Public Function ReadVarShort() As Integer Implements IDataReader.ReadVarShort
Dim local_4 = 0
Dim local_1 = 0
Dim local_2 = 0
Dim local_3 = False
While local_2 < SHORT_SIZE
local_4 = ReadByte()
local_3 = (local_4 And MASK_10000000) = MASK_10000000
If local_2 > 0 Then
local_1 += ((local_4 And MASK_01111111) << local_2)
Else
local_1 += (local_4 And MASK_01111111)
End If
local_2 += CHUNCK_BIT_SIZE
If Not local_3 Then
If local_1 > SHORT_MAX_VALUE Then
local_1 -= UNSIGNED_SHORT_MAX_VALUE
End If
Return local_1
End If
End While
Throw New System.Exception("Too much data")
End Function
Public Function ReadVarUhShort() As UInteger Implements IDataReader.ReadVarUhShort
Return CUInt(ReadVarShort())
End Function
Public Function ReadVarLong() As Double Implements IDataReader.ReadVarLong
Return ReadVarInt64(Me).ToNumber()
End Function
Public Class FinalInt64
#Region "Variables"
Public Low As UInt64
Public High As Integer
#End Region
#Region "Builder"
Public Sub New(Optional param1 As UInt64 = 0, Optional param2 As Integer = 0)
Low = param1
High = param2
End Sub
#End Region
#Region "Methods"
Public Shared Function FromNumber(param1 As Double) As FinalInt64
Return New FinalInt64(Convert.ToUInt64(param1), CInt(Math.Floor(param1 / 4294967296.0)))
End Function
Public Function ToNumber() As Double
Return High * 4294967296.0 + Low
End Function
#End Region
End Class
Public Function ReadVarUhLong() As Double Implements IDataReader.ReadVarUhLong
Return ReadVarUInt64(Me).ToNumber()
End Function
Public Function ReadVarInt64(reader As BigEndianReader) As FinalInt64
Dim local_3 As Integer = 0
Dim local_2 As New FinalInt64()
Dim local_4 As Integer = 0
While True
local_3 = reader.readUnsignedByte()
If local_4 = 28 Then
Exit While
End If
If local_3 >= 128 Then
local_2.Low = local_2.Low Or CUInt((local_3 And 127) << local_4)
local_4 += 7
Continue While
End If
local_2.Low = local_2.Low Or CUInt(local_3 << local_4)
Return local_2
End While
If local_3 >= 128 Then
local_3 = local_3 And 127
local_2.Low = local_2.Low Or CUInt(local_3 << local_4)
local_2.High = CUInt(local_3 >> 4)
local_4 = 3
While True
local_3 = reader.readUnsignedByte()
If local_4 < 32 Then
If local_3 >= 128 Then
local_2.High = local_2.High Or CUInt((local_3 And 127) << local_4)
Else
Exit While
End If
End If
local_4 += 7
End While
local_2.High = local_2.High Or CUInt(local_3 << local_4)
Return local_2
End If
local_2.Low = local_2.Low Or CUInt(local_3 << local_4)
local_2.High = CUInt(local_3 >> 4)
Return local_2
End Function
Public Function ReadVarUInt64(reader As BigEndianReader) As FinalUInt64
Dim local_3 As Integer = 0
Dim local_2 As New FinalUInt64()
Dim local_4 As Integer = 0
While True
local_3 = reader.readUnsignedByte()
If local_4 = 28 Then
Exit While
End If
If local_3 >= 128 Then
local_2.Low = local_2.Low Or CUInt((local_3 And 127) << local_4)
local_4 += 7
Continue While
End If
local_2.Low = local_2.Low Or CUInt(local_3 << local_4)
Return local_2
End While
If local_3 >= 128 Then
local_3 = local_3 And 127
local_2.Low = local_2.Low Or CUInt(local_3 << local_4)
local_2.High = CUInt(local_3 >> 4)
local_4 = 3
While True
local_3 = reader.ReadByte()
If local_4 < 32 Then
If local_3 >= 128 Then
local_2.High = local_2.High Or CUInt((local_3 And 127) << local_4)
Else
Exit While
End If
End If
local_4 += 7
End While
local_2.High = local_2.High Or CUInt(local_3 << local_4)
Return local_2
End If
local_2.Low = local_2.Low Or CUInt(local_3 << local_4)
local_2.High = CUInt(local_3 >> 4)
Return local_2
End Function
