| public static ToDouble ( byte buffer, int offset ) : double | ||
| buffer | byte | |
| offset | int | |
| return | double | |
public void PerformanceTest()
{
var dummy = new byte[8];
// Let's load and JIT
BigEndianBinary.ToInt16(dummy, 0);
BigEndianBinary.ToInt32(dummy, 0);
BigEndianBinary.ToInt64(dummy, 0);
BigEndianBinary.ToUInt16(dummy, 0);
BigEndianBinary.ToUInt32(dummy, 0);
BigEndianBinary.ToUInt64(dummy, 0);
BigEndianBinary.ToSingle(dummy, 0);
BigEndianBinary.ToDouble(dummy, 0);
BitConverter.ToInt16(dummy, 0);
BitConverter.ToInt32(dummy, 0);
BitConverter.ToInt64(dummy, 0);
BitConverter.ToUInt16(dummy, 0);
BitConverter.ToUInt32(dummy, 0);
BitConverter.ToUInt64(dummy, 0);
BitConverter.ToSingle(dummy, 0);
BitConverter.ToDouble(dummy, 0);
// Go
const int iteration = 1000000;
PerformanceTestCore(new byte[] { 0, 0x80, 0xff, 0 }, BigEndianBinary.ToInt16, BitConverter.ToInt16, iteration);
PerformanceTestCore(new byte[] { 0, 0x80, 0xff, 0 }, BigEndianBinary.ToUInt16, BitConverter.ToUInt16, iteration);
PerformanceTestCore(new byte[] { 0, 0x80, 0x00, 0xff, 0xff, 0 }, BigEndianBinary.ToInt32, BitConverter.ToInt32, iteration);
PerformanceTestCore(new byte[] { 0, 0x80, 0x00, 0xff, 0xff, 0 }, BigEndianBinary.ToUInt32, BitConverter.ToUInt32, iteration);
PerformanceTestCore(new byte[] { 0, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0 }, BigEndianBinary.ToInt64, BitConverter.ToInt64, iteration);
PerformanceTestCore(new byte[] { 0, 0x80, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0 }, BigEndianBinary.ToUInt64, BitConverter.ToUInt64, iteration);
PerformanceTestCore(new byte[] { 0, 0x80, 0xff, 0x00, 0xff, 0 }, BigEndianBinary.ToSingle, BitConverter.ToSingle, iteration);
PerformanceTestCore(new byte[] { 0, 0x80, 0xff, 0x00, 0xff, 0x00, 0xff, 0x00, 0xff, 0 }, BigEndianBinary.ToDouble, BitConverter.ToDouble, iteration);
}
public void TestToDouble()
{
Assert.AreEqual(0.0, BigEndianBinary.ToDouble(new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(-0.0, BigEndianBinary.ToDouble(new byte[] { 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(Double.Epsilon, BigEndianBinary.ToDouble(new byte[] { 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }, 0));
Assert.AreEqual(-1.0 * Double.Epsilon, BigEndianBinary.ToDouble(new byte[] { 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01 }, 0));
Assert.AreEqual(Double.MinValue, BigEndianBinary.ToDouble(new byte[] { 0xff, 0xef, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, 0));
Assert.AreEqual(Double.MaxValue, BigEndianBinary.ToDouble(new byte[] { 0x7f, 0xef, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }, 0));
Assert.AreEqual(Double.NaN, BigEndianBinary.ToDouble(new byte[] { 0x7f, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(Double.NaN, BigEndianBinary.ToDouble(new byte[] { 0xff, 0xf8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(Double.PositiveInfinity, BigEndianBinary.ToDouble(new byte[] { 0x7f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(Double.NegativeInfinity, BigEndianBinary.ToDouble(new byte[] { 0xff, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(1.0, BigEndianBinary.ToDouble(new byte[] { 0x3f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(-1.0, BigEndianBinary.ToDouble(new byte[] { 0xbf, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(2.0, BigEndianBinary.ToDouble(new byte[] { 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(-2.0, BigEndianBinary.ToDouble(new byte[] { 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 }, 0));
Assert.AreEqual(1.0, BigEndianBinary.ToDouble(new byte[] { 0xff, 0x3f, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff }, 1));
}
private ReadValueResult ReadValue(out byte header, out long integral, out float real32, out double real64)
{
var readHeader = this.ReadByteFromSource();
// This is BAD practice for out, but it reduces IL size very well for this method.
integral = default(long);
real32 = default(float);
real64 = default(double);
if (readHeader < 0)
{
header = 0;
return(ReadValueResult.Eof);
}
header = unchecked (( byte )readHeader);
switch (header >> 4)
{
case 0x0:
case 0x1:
case 0x2:
case 0x3:
case 0x4:
case 0x5:
case 0x6:
case 0x7:
{
// PositiveFixNum
this.InternalCollectionType = CollectionType.None;
integral = header;
return(ReadValueResult.Byte);
}
case 0x8:
{
// FixMap
integral = header & 0xF;
return(ReadValueResult.MapLength);
}
case 0x9:
{
// FixArray
integral = header & 0xF;
return(ReadValueResult.ArrayLength);
}
case 0xA:
case 0xB:
{
// FixRaw
integral = header & 0x1F;
return(ReadValueResult.String);
}
case 0xE:
case 0xF:
{
// NegativeFixNum
this.InternalCollectionType = CollectionType.None;
integral = header | unchecked (( long )0xFFFFFFFFFFFFFF00);
return(ReadValueResult.SByte);
}
}
switch (header)
{
case MessagePackCode.NilValue:
{
return(ReadValueResult.Nil);
}
case MessagePackCode.TrueValue:
{
integral = 1;
return(ReadValueResult.Boolean);
}
case MessagePackCode.FalseValue:
{
integral = 0;
return(ReadValueResult.Boolean);
}
case MessagePackCode.SignedInt8:
{
this.ReadStrict(this._scalarBuffer, sizeof(sbyte));
integral = BigEndianBinary.ToSByte(this._scalarBuffer, 0);
return(ReadValueResult.SByte);
}
case MessagePackCode.SignedInt16:
{
this.ReadStrict(this._scalarBuffer, sizeof(short));
integral = BigEndianBinary.ToInt16(this._scalarBuffer, 0);
return(ReadValueResult.Int16);
}
case MessagePackCode.SignedInt32:
{
this.ReadStrict(this._scalarBuffer, sizeof(int));
integral = BigEndianBinary.ToInt32(this._scalarBuffer, 0);
return(ReadValueResult.Int32);
}
case MessagePackCode.SignedInt64:
{
this.ReadStrict(this._scalarBuffer, sizeof(long));
integral = BigEndianBinary.ToInt64(this._scalarBuffer, 0);
return(ReadValueResult.Int64);
}
case MessagePackCode.UnsignedInt8:
{
this.ReadStrict(this._scalarBuffer, sizeof(byte));
integral = BigEndianBinary.ToByte(this._scalarBuffer, 0);
return(ReadValueResult.Byte);
}
case MessagePackCode.UnsignedInt16:
{
this.ReadStrict(this._scalarBuffer, sizeof(ushort));
integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
return(ReadValueResult.UInt16);
}
case MessagePackCode.UnsignedInt32:
{
this.ReadStrict(this._scalarBuffer, sizeof(uint));
integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
return(ReadValueResult.UInt32);
}
case MessagePackCode.UnsignedInt64:
{
this.ReadStrict(this._scalarBuffer, sizeof(ulong));
integral = unchecked (( long )BigEndianBinary.ToUInt64(this._scalarBuffer, 0));
return(ReadValueResult.UInt64);
}
case MessagePackCode.Real32:
{
this.ReadStrict(this._scalarBuffer, sizeof(float));
real32 = BigEndianBinary.ToSingle(this._scalarBuffer, 0);
return(ReadValueResult.Single);
}
case MessagePackCode.Real64:
{
this.ReadStrict(this._scalarBuffer, sizeof(double));
real64 = BigEndianBinary.ToDouble(this._scalarBuffer, 0);
return(ReadValueResult.Double);
}
case MessagePackCode.Bin8:
{
this.ReadStrict(this._scalarBuffer, sizeof(byte));
integral = BigEndianBinary.ToByte(this._scalarBuffer, 0);
return(ReadValueResult.Binary);
}
case MessagePackCode.Str8:
{
this.ReadStrict(this._scalarBuffer, sizeof(byte));
integral = BigEndianBinary.ToByte(this._scalarBuffer, 0);
return(ReadValueResult.String);
}
case MessagePackCode.Bin16:
{
this.ReadStrict(this._scalarBuffer, sizeof(ushort));
integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
return(ReadValueResult.Binary);
}
case MessagePackCode.Raw16:
{
this.ReadStrict(this._scalarBuffer, sizeof(ushort));
integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
return(ReadValueResult.String);
}
case MessagePackCode.Bin32:
{
this.ReadStrict(this._scalarBuffer, sizeof(uint));
integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
return(ReadValueResult.Binary);
}
case MessagePackCode.Raw32:
{
this.ReadStrict(this._scalarBuffer, sizeof(uint));
integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
return(ReadValueResult.String);
}
case MessagePackCode.Array16:
{
this.ReadStrict(this._scalarBuffer, sizeof(ushort));
integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
return(ReadValueResult.ArrayLength);
}
case MessagePackCode.Array32:
{
this.ReadStrict(this._scalarBuffer, sizeof(uint));
integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
return(ReadValueResult.ArrayLength);
}
case MessagePackCode.Map16:
{
this.ReadStrict(this._scalarBuffer, sizeof(ushort));
integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
return(ReadValueResult.MapLength);
}
case MessagePackCode.Map32:
{
this.ReadStrict(this._scalarBuffer, sizeof(uint));
integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
return(ReadValueResult.MapLength);
}
case MessagePackCode.FixExt1:
{
return(ReadValueResult.FixExt1);
}
case MessagePackCode.FixExt2:
{
return(ReadValueResult.FixExt2);
}
case MessagePackCode.FixExt4:
{
return(ReadValueResult.FixExt4);
}
case MessagePackCode.FixExt8:
{
return(ReadValueResult.FixExt8);
}
case MessagePackCode.FixExt16:
{
return(ReadValueResult.FixExt16);
}
case MessagePackCode.Ext8:
{
return(ReadValueResult.Ext8);
}
case MessagePackCode.Ext16:
{
return(ReadValueResult.Ext16);
}
case MessagePackCode.Ext32:
{
return(ReadValueResult.Ext32);
}
default:
{
this.ThrowUnassignedMessageTypeException(readHeader);
// Never reach
return(ReadValueResult.Eof);
}
}
}
private async Task <AsyncReadValueResult> ReadValueAsync(CancellationToken cancellationToken)
{
var readHeader = await this.ReadByteFromSourceAsync(cancellationToken).ConfigureAwait(false);
var result = default(AsyncReadValueResult);
if (readHeader < 0)
{
return(result);
}
var header = unchecked (( byte )readHeader);
result.header = header;
switch (header >> 4)
{
case 0x0:
case 0x1:
case 0x2:
case 0x3:
case 0x4:
case 0x5:
case 0x6:
case 0x7:
{
// PositiveFixNum
this.InternalCollectionType = CollectionType.None;
result.integral = header;
result.type = ReadValueResult.Byte;
return(result);
}
case 0x8:
{
// FixMap
result.integral = header & 0xF;
result.type = ReadValueResult.MapLength;
return(result);
}
case 0x9:
{
// FixArray
result.integral = header & 0xF;
result.type = ReadValueResult.ArrayLength;
return(result);
}
case 0xA:
case 0xB:
{
// FixRaw
result.integral = header & 0x1F;
result.type = ReadValueResult.String;
return(result);
}
case 0xE:
case 0xF:
{
// NegativeFixNum
this.InternalCollectionType = CollectionType.None;
result.integral = header | unchecked (( long )0xFFFFFFFFFFFFFF00);
result.type = ReadValueResult.SByte;
return(result);
}
}
switch (header)
{
case MessagePackCode.NilValue:
{
result.type = ReadValueResult.Nil;
return(result);
}
case MessagePackCode.TrueValue:
{
result.integral = 1;
result.type = ReadValueResult.Boolean;
return(result);
}
case MessagePackCode.FalseValue:
{
result.integral = 0;
result.type = ReadValueResult.Boolean;
return(result);
}
case MessagePackCode.SignedInt8:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(sbyte), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToSByte(this._scalarBuffer, 0);
result.type = ReadValueResult.SByte;
return(result);
}
case MessagePackCode.SignedInt16:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(short), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToInt16(this._scalarBuffer, 0);
result.type = ReadValueResult.Int16;
return(result);
}
case MessagePackCode.SignedInt32:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(int), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToInt32(this._scalarBuffer, 0);
result.type = ReadValueResult.Int32;
return(result);
}
case MessagePackCode.SignedInt64:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(long), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToInt64(this._scalarBuffer, 0);
result.type = ReadValueResult.Int64;
return(result);
}
case MessagePackCode.UnsignedInt8:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(byte), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToByte(this._scalarBuffer, 0);
result.type = ReadValueResult.Byte;
return(result);
}
case MessagePackCode.UnsignedInt16:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(ushort), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
result.type = ReadValueResult.UInt16;
return(result);
}
case MessagePackCode.UnsignedInt32:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(uint), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
result.type = ReadValueResult.UInt32;
return(result);
}
case MessagePackCode.UnsignedInt64:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(ulong), cancellationToken).ConfigureAwait(false);
result.integral = unchecked (( long )BigEndianBinary.ToUInt64(this._scalarBuffer, 0));
result.type = ReadValueResult.UInt64;
return(result);
}
case MessagePackCode.Real32:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(float), cancellationToken).ConfigureAwait(false);
result.real32 = BigEndianBinary.ToSingle(this._scalarBuffer, 0);
result.type = ReadValueResult.Single;
return(result);
}
case MessagePackCode.Real64:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(double), cancellationToken).ConfigureAwait(false);
result.real64 = BigEndianBinary.ToDouble(this._scalarBuffer, 0);
result.type = ReadValueResult.Double;
return(result);
}
case MessagePackCode.Bin8:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(byte), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToByte(this._scalarBuffer, 0);
result.type = ReadValueResult.Binary;
return(result);
}
case MessagePackCode.Str8:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(byte), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToByte(this._scalarBuffer, 0);
result.type = ReadValueResult.String;
return(result);
}
case MessagePackCode.Bin16:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(ushort), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
result.type = ReadValueResult.Binary;
return(result);
}
case MessagePackCode.Raw16:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(ushort), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
result.type = ReadValueResult.String;
return(result);
}
case MessagePackCode.Bin32:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(uint), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
result.type = ReadValueResult.Binary;
return(result);
}
case MessagePackCode.Raw32:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(uint), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
result.type = ReadValueResult.String;
return(result);
}
case MessagePackCode.Array16:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(ushort), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
result.type = ReadValueResult.ArrayLength;
return(result);
}
case MessagePackCode.Array32:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(uint), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
result.type = ReadValueResult.ArrayLength;
return(result);
}
case MessagePackCode.Map16:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(ushort), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt16(this._scalarBuffer, 0);
result.type = ReadValueResult.MapLength;
return(result);
}
case MessagePackCode.Map32:
{
await this.ReadStrictAsync(this._scalarBuffer, sizeof(uint), cancellationToken).ConfigureAwait(false);
result.integral = BigEndianBinary.ToUInt32(this._scalarBuffer, 0);
result.type = ReadValueResult.MapLength;
return(result);
}
case MessagePackCode.FixExt1:
{
result.type = ReadValueResult.FixExt1;
return(result);
}
case MessagePackCode.FixExt2:
{
result.type = ReadValueResult.FixExt2;
return(result);
}
case MessagePackCode.FixExt4:
{
result.type = ReadValueResult.FixExt4;
return(result);
}
case MessagePackCode.FixExt8:
{
result.type = ReadValueResult.FixExt8;
return(result);
}
case MessagePackCode.FixExt16:
{
result.type = ReadValueResult.FixExt16;
return(result);
}
case MessagePackCode.Ext8:
{
result.type = ReadValueResult.Ext8;
return(result);
}
case MessagePackCode.Ext16:
{
result.type = ReadValueResult.Ext16;
return(result);
}
case MessagePackCode.Ext32:
{
result.type = ReadValueResult.Ext32;
return(result);
}
default:
{
this.ThrowUnassignedMessageTypeException(readHeader);
// Never reach
result.type = ReadValueResult.Eof;
return(result);
}
}
}
