Class SmallSingle

Floating point numbers smaller than 32 bits.

NOTE: This was SmallFloat in Lucene

This is a Lucene.NET INTERNAL API, use at your own risk

Inheritance

System.Object

SmallSingle

Inherited Members

System.Object.Equals(System.Object)

System.Object.Equals(System.Object, System.Object)

System.Object.GetHashCode()

System.Object.GetType()

System.Object.MemberwiseClone()

System.Object.ReferenceEquals(System.Object, System.Object)

System.Object.ToString()

Namespace: Lucene.Net.Util

Assembly: Lucene.Net.dll

Syntax

public static class SmallSingle

Methods

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Byte315ToSingle(Byte)

ByteToSingle(b, mantissaBits=3, zeroExponent=15)

NOTE: This was byte315ToFloat() in Lucene

Declaration

public static float Byte315ToSingle(byte b)

Parameters

Type	Name	Description
System.Byte	b

Returns

Type	Description
System.Single

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Byte52ToSingle(Byte)

ByteToFloat(b, mantissaBits=5, zeroExponent=2)

NOTE: This was byte52ToFloat() in Lucene

Declaration

public static float Byte52ToSingle(byte b)

Parameters

Type	Name	Description
System.Byte	b

Returns

Type	Description
System.Single

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ByteToSingle(Byte, Int32, Int32)

Converts an 8 bit System.Single to a 32 bit System.Single.

NOTE: This was byteToFloat() in Lucene

Declaration

public static float ByteToSingle(byte b, int numMantissaBits, int zeroExp)

Parameters

Type	Name	Description
System.Byte	b
System.Int32	numMantissaBits
System.Int32	zeroExp

Returns

Type	Description
System.Single

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SByte315ToSingle(SByte)

SByteToSingle(b, mantissaBits=3, zeroExponent=15)

NOTE: This was byte315ToFloat() in Lucene

Declaration

[CLSCompliant(false)]
public static float SByte315ToSingle(sbyte b)

Parameters

Type	Name	Description
System.SByte	b

Returns

Type	Description
System.Single

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SByte52ToSingle(SByte)

SByteToFloat(b, mantissaBits=5, zeroExponent=2)

NOTE: This was byte52ToFloat() in Lucene

Declaration

[CLSCompliant(false)]
public static float SByte52ToSingle(sbyte b)

Parameters

Type	Name	Description
System.SByte	b

Returns

Type	Description
System.Single

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SByteToSingle(SByte, Int32, Int32)

Converts an 8 bit System.Single to a 32 bit System.Single.

NOTE: This was byteToFloat() in Lucene

Declaration

[CLSCompliant(false)]
public static float SByteToSingle(sbyte b, int numMantissaBits, int zeroExp)

Parameters

Type	Name	Description
System.SByte	b
System.Int32	numMantissaBits
System.Int32	zeroExp

Returns

Type	Description
System.Single

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SingleToByte(Single, Int32, Int32)

Converts a 32 bit System.Single to an 8 bit System.Single.

Values less than zero are all mapped to zero.

Values are truncated (rounded down) to the nearest 8 bit value.

Values between zero and the smallest representable value are rounded up.

Declaration

public static byte SingleToByte(float f, int numMantissaBits, int zeroExp)

Parameters

Type	Name	Description
System.Single	f	The 32 bit System.Single to be converted to an 8 bit System.Single (System.Byte).
System.Int32	numMantissaBits	The number of mantissa bits to use in the byte, with the remainder to be used in the exponent.
System.Int32	zeroExp	The zero-point in the range of exponent values.

Returns

Type	Description
System.Byte	The 8 bit float representation.

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SingleToByte315(Single)

SingleToSByte((byte)b, mantissaBits=3, zeroExponent=15)

smallest non-zero value = 5.820766E-10

largest value = 7.5161928E9

epsilon = 0.125

NOTE: This was floatToByte315() in Lucene

Declaration

public static byte SingleToByte315(float f)

Parameters

Type	Name	Description
System.Single	f

Returns

Type	Description
System.Byte

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SingleToByte52(Single)

SingleToByte(b, mantissaBits=5, zeroExponent=2)

smallest nonzero value = 0.033203125

largest value = 1984.0

epsilon = 0.03125

NOTE: This was floatToByte52() in Lucene

Declaration

public static byte SingleToByte52(float f)

Parameters

Type	Name	Description
System.Single	f

Returns

Type	Description
System.Byte

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SingleToSByte(Single, Int32, Int32)

Converts a 32 bit System.Single to an 8 bit System.Single.

Values less than zero are all mapped to zero.

Values are truncated (rounded down) to the nearest 8 bit value.

Values between zero and the smallest representable value are rounded up.

NOTE: This was floatToByte() in Lucene

Declaration

[CLSCompliant(false)]
public static sbyte SingleToSByte(float f, int numMantissaBits, int zeroExp)

Parameters

Type	Name	Description
System.Single	f	The 32 bit System.Single to be converted to an 8 bit System.Single (System.SByte).
System.Int32	numMantissaBits	The number of mantissa bits to use in the byte, with the remainder to be used in the exponent.
System.Int32	zeroExp	The zero-point in the range of exponent values.

Returns

Type	Description
System.SByte	The 8 bit float representation.

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SingleToSByte315(Single)

SingleToSByte(b, mantissaBits=3, zeroExponent=15)

smallest non-zero value = 5.820766E-10

largest value = 7.5161928E9

epsilon = 0.125

NOTE: This was floatToByte315() in Lucene

Declaration

[CLSCompliant(false)]
public static sbyte SingleToSByte315(float f)

Parameters

Type	Name	Description
System.Single	f

Returns

Type	Description
System.SByte

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SingleToSByte52(Single)

SingleToSByte(b, mantissaBits=5, zeroExponent=2)

smallest nonzero value = 0.033203125

largest value = 1984.0

epsilon = 0.03125

NOTE: This was floatToByte52() in Lucene

Declaration

[CLSCompliant(false)]
public static sbyte SingleToSByte52(float f)

Parameters

Type	Name	Description
System.Single	f

Returns

Type	Description
System.SByte