/// <summary> /// Loads the header. /// </summary> public void LoadHeader(BinaryStreamBase stream) { stream.Position = 0; byte version = stream.ReadUInt8(); if (version == 109) { stream.Position = 0; if (EncodingDefinition.FixedSizeCombinedEncoding != new EncodingDefinition(stream.ReadGuid())) { throw new Exception("Header Corrupt"); } if (TreeNodeType != new EncodingDefinition(stream.ReadGuid())) { throw new Exception("Header Corrupt"); } if (BlockSize != stream.ReadInt32()) { throw new Exception("Header Corrupt"); } if (stream.ReadUInt8() != 0) { throw new Exception("Header Corrupt"); } LastAllocatedBlock = stream.ReadUInt32(); RootNodeIndexAddress = stream.ReadUInt32(); RootNodeLevel = stream.ReadUInt8(); } else if (version == 1) { if (BlockSize != stream.ReadInt32()) { throw new Exception("Header Corrupt"); } if (TreeNodeType != new EncodingDefinition(stream)) { throw new Exception("Header Corrupt"); } LastAllocatedBlock = stream.ReadUInt32(); RootNodeIndexAddress = stream.ReadUInt32(); RootNodeLevel = stream.ReadUInt8(); } else { throw new VersionNotFoundException(); } }
/// <summary> /// Creates a new filter backed by a <see cref="BitArray"/>. /// </summary> /// <param name="stream">The the stream to load from.</param> /// <param name="pointCount">the number of points in the stream.</param> /// <param name="maxValue">the maximum value stored in the bit array. Cannot be larger than int.MaxValue-1</param> public UIntHashSet(BinaryStreamBase stream, int pointCount, ulong maxValue) { m_maxValue = maxValue; m_points = new HashSet <uint>(); while (pointCount > 0) { m_points.Add(stream.ReadUInt32()); pointCount--; } }
/// <summary> /// Creates a new filter backed by a <see cref="BitArray"/>. /// </summary> /// <param name="stream">The the stream to load from.</param> /// <param name="pointCount">the number of points in the stream.</param> /// <param name="maxValue">the maximum value stored in the bit array. Cannot be larger than int.MaxValue-1</param> public BitArrayFilter(BinaryStreamBase stream, int pointCount, ulong maxValue) { if (maxValue >= int.MaxValue) { throw new ArgumentOutOfRangeException("maxValue", "Cannot be larger than int.MaxValue-1"); } MaxValue = maxValue; m_points = new BitArray(false, (int)maxValue + 1); while (pointCount > 0) { //Since a bitarray cannot have more than 32bit m_points.SetBit((int)stream.ReadUInt32()); pointCount--; } foreach (int point in m_points.GetAllSetBits()) { MinValue = (ulong)point; break; } }
public unsafe override void Decode(BinaryStreamBase stream, HistorianKey prevKey, HistorianValue prevValue, HistorianKey key, HistorianValue value, out bool isEndOfStream) { isEndOfStream = false; uint code = stream.ReadUInt8(); byte b1; byte b2; byte b3; //Compression Stages: // Stage 1: Big Positive Float. // Stage 2: Big Negative Float. // Stage 3: Zero // Stage 4: 32 bit // Stage 5: Catch all if (code < 0x80) { b1 = stream.ReadUInt8(); b2 = stream.ReadUInt8(); b3 = stream.ReadUInt8(); //If stage 1 (50% success) key.Timestamp = prevKey.Timestamp; key.PointID = prevKey.PointID + 1 + ((code >> 4) & 0x7); key.EntryNumber = 0; value.Value1 = (4u << 28) | (code & 0xF) << 24 | (uint)b1 << 16 | (uint)b2 << 8 | (uint)b3 << 0; value.Value2 = 0; value.Value3 = 0; return; } if (code < 0xC0) { b1 = stream.ReadUInt8(); b2 = stream.ReadUInt8(); b3 = stream.ReadUInt8(); //If stage 2 (16% success) key.Timestamp = prevKey.Timestamp; key.PointID = prevKey.PointID + 1 + ((code >> 4) & 0x3); key.EntryNumber = 0; value.Value1 = (12u << 28) | (code & 0xF) << 24 | (uint)b1 << 16 | (uint)b2 << 8 | (uint)b3 << 0; value.Value2 = 0; value.Value3 = 0; return; } if (code < 0xD0) { //If stage 3 (28% success) key.Timestamp = prevKey.Timestamp; key.PointID = prevKey.PointID + 1 + (code & 0xF); key.EntryNumber = 0; value.Value1 = 0; value.Value2 = 0; value.Value3 = 0; return; } if (code < 0xE0) { //If stage 4 (3% success) key.Timestamp = prevKey.Timestamp; key.PointID = prevKey.PointID + 1 + (code & 0xF); key.EntryNumber = 0; value.Value1 = stream.ReadUInt32(); value.Value2 = 0; value.Value3 = 0; return; } //Stage 5: 2% //Stage 5: Catch All if ((code & 16) != 0) //T is set { key.Timestamp = prevKey.Timestamp + stream.Read7BitUInt64(); key.PointID = stream.Read7BitUInt64(); } else { key.Timestamp = prevKey.Timestamp; key.PointID = prevKey.PointID + stream.Read7BitUInt64(); } if ((code & 8) != 0) //E is set) { key.EntryNumber = stream.Read7BitUInt64(); } else { key.EntryNumber = 0; } if ((code & 4) != 0) //V1 is set) { value.Value1 = stream.ReadUInt64(); } else { value.Value1 = stream.ReadUInt32(); } if ((code & 2) != 0) //V2 is set) { value.Value2 = stream.Read7BitUInt64(); } else { value.Value2 = 0; } if ((code & 1) != 0) //V3 is set) { value.Value3 = stream.Read7BitUInt64(); } else { value.Value3 = 0; } }
public override void Read(BinaryStreamBase stream) { Value = stream.ReadUInt32(); }
public override void Decode(BinaryStreamBase stream, HistorianKey prevKey, HistorianValue prevValue, HistorianKey key, HistorianValue value, out bool isEndOfStream) { isEndOfStream = false; byte code = stream.ReadUInt8(); if (code == 255) { isEndOfStream = true; return; } if (code < 128) { if (code < 64) { key.Timestamp = prevKey.Timestamp; key.PointID = prevKey.PointID ^ code; key.EntryNumber = 0; value.Value1 = 0; value.Value2 = 0; value.Value3 = 0; } else { key.Timestamp = prevKey.Timestamp; key.PointID = prevKey.PointID ^ code ^ 64; key.EntryNumber = 0; value.Value1 = stream.ReadUInt32(); value.Value2 = 0; value.Value3 = 0; } return; } if ((code & 64) != 0) //T is set { key.Timestamp = prevKey.Timestamp ^ stream.Read7BitUInt64(); } else { key.Timestamp = prevKey.Timestamp; } key.PointID = prevKey.PointID ^ stream.Read7BitUInt64(); if ((code & 32) != 0) //E is set) { key.EntryNumber = stream.Read7BitUInt64(); } else { key.EntryNumber = 0; } if ((code & 16) != 0) //V1 High is set) { value.Value1 = stream.ReadUInt64(); } else if ((code & 8) != 0) //V1 low is set) { value.Value1 = stream.ReadUInt32(); } else { value.Value1 = 0; } if ((code & 4) != 0) //V2 is set) { value.Value2 = stream.ReadUInt64(); } else { value.Value2 = 0; } if ((code & 2) != 0) //V1 High is set) { value.Value3 = stream.ReadUInt64(); } else if ((code & 1) != 0) //V1 low is set) { value.Value3 = stream.ReadUInt32(); } else { value.Value3 = 0; } return; }