public static void HalfToInt16Bits()
{
Half input = (Half)12.34;
short result = BitConverter.HalfToInt16Bits(input);
Assert.Equal((short)18988, result);
Half roundtripped = BitConverter.Int16BitsToHalf(result);
Assert.Equal(input, roundtripped);
}
public static bool TryReadHalfLittleEndian(ReadOnlySpan <byte> source, out Half value)
{
if (!BitConverter.IsLittleEndian)
{
bool success = MemoryMarshal.TryRead(source, out short tmp);
value = BitConverter.Int16BitsToHalf(ReverseEndianness(tmp));
return(success);
}
return(MemoryMarshal.TryRead(source, out value));
}
public virtual Half ReadHalf() => BitConverter.Int16BitsToHalf(BinaryPrimitives.ReadInt16LittleEndian(InternalRead(2)));
public static Half ReadHalfLittleEndian(ReadOnlySpan <byte> source)
{
return(!BitConverter.IsLittleEndian ?
BitConverter.Int16BitsToHalf(ReverseEndianness(MemoryMarshal.Read <short>(source))) :
MemoryMarshal.Read <Half>(source));
}
public void SpanWrite()
{
Assert.True(BitConverter.IsLittleEndian);
Span <byte> span = new byte[8];
byte byteValue = 0x11;
MemoryMarshal.Write <byte>(span, ref byteValue);
TestHelpers.Validate <byte>(span, byteValue);
Assert.True(MemoryMarshal.TryWrite <byte>(span, ref byteValue));
TestHelpers.Validate <byte>(span, byteValue);
sbyte sbyteValue = 0x11;
MemoryMarshal.Write <sbyte>(span, ref sbyteValue);
TestHelpers.Validate <sbyte>(span, sbyteValue);
Assert.True(MemoryMarshal.TryWrite <sbyte>(span, ref sbyteValue));
TestHelpers.Validate <sbyte>(span, sbyteValue);
ushort ushortValue = 0x1122;
MemoryMarshal.Write <ushort>(span, ref ushortValue);
TestHelpers.Validate <ushort>(span, ushortValue);
Assert.True(MemoryMarshal.TryWrite <ushort>(span, ref ushortValue));
TestHelpers.Validate <ushort>(span, ushortValue);
uint uintValue = 0x11223344;
MemoryMarshal.Write <uint>(span, ref uintValue);
TestHelpers.Validate <uint>(span, uintValue);
Assert.True(MemoryMarshal.TryWrite <uint>(span, ref uintValue));
TestHelpers.Validate <uint>(span, uintValue);
ulong ulongValue = 0x1122334455667788;
MemoryMarshal.Write <ulong>(span, ref ulongValue);
TestHelpers.Validate <ulong>(span, ulongValue);
Assert.True(MemoryMarshal.TryWrite <ulong>(span, ref ulongValue));
TestHelpers.Validate <ulong>(span, ulongValue);
short shortValue = 0x1122;
MemoryMarshal.Write <short>(span, ref shortValue);
TestHelpers.Validate <short>(span, shortValue);
Assert.True(MemoryMarshal.TryWrite <short>(span, ref shortValue));
TestHelpers.Validate <short>(span, shortValue);
int intValue = 0x11223344;
MemoryMarshal.Write <int>(span, ref intValue);
TestHelpers.Validate <int>(span, intValue);
Assert.True(MemoryMarshal.TryWrite <int>(span, ref intValue));
TestHelpers.Validate <int>(span, intValue);
long longValue = 0x1122334455667788;
MemoryMarshal.Write <long>(span, ref longValue);
TestHelpers.Validate <long>(span, longValue);
Assert.True(MemoryMarshal.TryWrite <long>(span, ref longValue));
TestHelpers.Validate <long>(span, longValue);
Half halfValue = BitConverter.Int16BitsToHalf(0x1122);
MemoryMarshal.Write <Half>(span, ref halfValue);
TestHelpers.Validate <Half>(span, halfValue);
Assert.True(MemoryMarshal.TryWrite <Half>(span, ref halfValue));
TestHelpers.Validate <Half>(span, halfValue);
float floatValue = BitConverter.Int32BitsToSingle(0x11223344);
MemoryMarshal.Write <float>(span, ref floatValue);
TestHelpers.Validate <float>(span, floatValue);
Assert.True(MemoryMarshal.TryWrite <float>(span, ref floatValue));
TestHelpers.Validate <float>(span, floatValue);
double doubleValue = BitConverter.Int64BitsToDouble(0x1122334455667788);
MemoryMarshal.Write <double>(span, ref doubleValue);
TestHelpers.Validate <double>(span, doubleValue);
Assert.True(MemoryMarshal.TryWrite <double>(span, ref doubleValue));
TestHelpers.Validate <double>(span, doubleValue);
}
public void SpanRead()
{
ulong value; // [11 22 33 44 55 66 77 88]
if (BitConverter.IsLittleEndian)
{
value = 0x8877665544332211;
}
else
{
value = 0x1122334455667788;
}
Span <byte> span;
unsafe
{
span = new Span <byte>(&value, 8);
}
Assert.Equal <byte>(0x11, MemoryMarshal.Read <byte>(span));
Assert.True(MemoryMarshal.TryRead(span, out byte byteValue));
Assert.Equal(0x11, byteValue);
Assert.Equal <sbyte>(0x11, MemoryMarshal.Read <sbyte>(span));
Assert.True(MemoryMarshal.TryRead(span, out byte sbyteValue));
Assert.Equal(0x11, byteValue);
Assert.Equal <ushort>(0x1122, ReadUInt16BigEndian(span));
Assert.True(TryReadUInt16BigEndian(span, out ushort ushortValue));
Assert.Equal(0x1122, ushortValue);
Assert.Equal <ushort>(0x2211, ReadUInt16LittleEndian(span));
Assert.True(TryReadUInt16LittleEndian(span, out ushortValue));
Assert.Equal(0x2211, ushortValue);
Assert.Equal <short>(0x1122, ReadInt16BigEndian(span));
Assert.True(TryReadInt16BigEndian(span, out short shortValue));
Assert.Equal(0x1122, shortValue);
Assert.Equal <short>(0x2211, ReadInt16LittleEndian(span));
Assert.True(TryReadInt16LittleEndian(span, out shortValue));
Assert.Equal(0x2211, ushortValue);
Assert.Equal <uint>(0x11223344, ReadUInt32BigEndian(span));
Assert.True(TryReadUInt32BigEndian(span, out uint uintValue));
Assert.Equal <uint>(0x11223344, uintValue);
Assert.Equal <uint>(0x44332211, ReadUInt32LittleEndian(span));
Assert.True(TryReadUInt32LittleEndian(span, out uintValue));
Assert.Equal <uint>(0x44332211, uintValue);
Assert.Equal <int>(0x11223344, ReadInt32BigEndian(span));
Assert.True(TryReadInt32BigEndian(span, out int intValue));
Assert.Equal <int>(0x11223344, intValue);
Assert.Equal <int>(0x44332211, ReadInt32LittleEndian(span));
Assert.True(TryReadInt32LittleEndian(span, out intValue));
Assert.Equal <int>(0x44332211, intValue);
Assert.Equal <ulong>(0x1122334455667788, ReadUInt64BigEndian(span));
Assert.True(TryReadUInt64BigEndian(span, out ulong ulongValue));
Assert.Equal <ulong>(0x1122334455667788, ulongValue);
Assert.Equal <ulong>(0x8877665544332211, ReadUInt64LittleEndian(span));
Assert.True(TryReadUInt64LittleEndian(span, out ulongValue));
Assert.Equal <ulong>(0x8877665544332211, ulongValue);
Assert.Equal <long>(0x1122334455667788, ReadInt64BigEndian(span));
Assert.True(TryReadInt64BigEndian(span, out long longValue));
Assert.Equal <long>(0x1122334455667788, longValue);
Assert.Equal <long>(unchecked ((long)0x8877665544332211), ReadInt64LittleEndian(span));
Assert.True(TryReadInt64LittleEndian(span, out longValue));
Assert.Equal <long>(unchecked ((long)0x8877665544332211), longValue);
Half expectedHalf = BitConverter.Int16BitsToHalf(0x1122);
Assert.Equal <Half>(expectedHalf, ReadHalfBigEndian(span));
Assert.True(TryReadHalfBigEndian(span, out Half halfValue));
Assert.Equal <Half>(expectedHalf, halfValue);
expectedHalf = BitConverter.Int16BitsToHalf(0x2211);
Assert.Equal <Half>(expectedHalf, ReadHalfLittleEndian(span));
Assert.True(TryReadHalfLittleEndian(span, out halfValue));
Assert.Equal <Half>(expectedHalf, halfValue);
float expectedFloat = BitConverter.Int32BitsToSingle(0x11223344);
Assert.Equal <float>(expectedFloat, ReadSingleBigEndian(span));
Assert.True(TryReadSingleBigEndian(span, out float floatValue));
Assert.Equal <float>(expectedFloat, floatValue);
expectedFloat = BitConverter.Int32BitsToSingle(0x44332211);
Assert.Equal <float>(expectedFloat, ReadSingleLittleEndian(span));
Assert.True(TryReadSingleLittleEndian(span, out floatValue));
Assert.Equal <float>(expectedFloat, floatValue);
double expectedDouble = BitConverter.Int64BitsToDouble(0x1122334455667788);
Assert.Equal <double>(expectedDouble, ReadDoubleBigEndian(span));
Assert.True(TryReadDoubleBigEndian(span, out double doubleValue));
Assert.Equal <double>(expectedDouble, doubleValue);
expectedDouble = BitConverter.Int64BitsToDouble(unchecked ((long)0x8877665544332211));
Assert.Equal <double>(expectedDouble, ReadDoubleLittleEndian(span));
Assert.True(TryReadDoubleLittleEndian(span, out doubleValue));
Assert.Equal <double>(expectedDouble, doubleValue);
}
