public override void WriteExtras(OperationBuilder builder)
{
Span <byte> extras = stackalloc byte[8];
Flags = Transcoder.GetFormat(Content);
Format = Flags.DataFormat;
Compression = Flags.Compression;
byte format = (byte)Format;
byte compression = (byte)Compression;
BitUtils.SetBit(ref extras[0], 0, BitUtils.GetBit(format, 0));
BitUtils.SetBit(ref extras[0], 1, BitUtils.GetBit(format, 1));
BitUtils.SetBit(ref extras[0], 2, BitUtils.GetBit(format, 2));
BitUtils.SetBit(ref extras[0], 3, BitUtils.GetBit(format, 3));
BitUtils.SetBit(ref extras[0], 4, false);
BitUtils.SetBit(ref extras[0], 5, BitUtils.GetBit(compression, 0));
BitUtils.SetBit(ref extras[0], 6, BitUtils.GetBit(compression, 1));
BitUtils.SetBit(ref extras[0], 7, BitUtils.GetBit(compression, 2));
var typeCode = (ushort)Flags.TypeCode;
ByteConverter.FromUInt16(typeCode, extras.Slice(2));
ByteConverter.FromUInt32(Expires, extras.Slice(4));
builder.Write(extras);
}
public virtual void ReadExtras(ReadOnlySpan <byte> buffer)
{
if (buffer.Length > Header.ExtrasOffset)
{
var format = new byte();
var flags = buffer[Header.ExtrasOffset];
BitUtils.SetBit(ref format, 0, BitUtils.GetBit(flags, 0));
BitUtils.SetBit(ref format, 1, BitUtils.GetBit(flags, 1));
BitUtils.SetBit(ref format, 2, BitUtils.GetBit(flags, 2));
BitUtils.SetBit(ref format, 3, BitUtils.GetBit(flags, 3));
var compression = new byte();
BitUtils.SetBit(ref compression, 4, BitUtils.GetBit(flags, 4));
BitUtils.SetBit(ref compression, 5, BitUtils.GetBit(flags, 5));
BitUtils.SetBit(ref compression, 6, BitUtils.GetBit(flags, 6));
var typeCode = (TypeCode)(ByteConverter.ToUInt16(buffer.Slice(26)) & 0xff);
Format = (DataFormat)format;
Compression = (Compression)compression;
Flags.DataFormat = Format;
Flags.Compression = Compression;
Flags.TypeCode = typeCode;
Expires = ByteConverter.ToUInt32(buffer.Slice(25));
}
}
public void When_ByteArray_Is_Stored_With_Legacy_Flags_It_Is_Decoded_As_A_ByteArray()
{
var legacyByteArray = new byte[]
{
129, 0, 0, 0, 4, 0, 0, 0, 0, 0, 0, 8, 0,
0, 0, 5, 19, 185, 8, 248, 3, 104, 208, 188, 0,
0, 250, 82, 116, 101, 115, 116
};
var converter = new DefaultConverter();
var format = new byte();
var temp = legacyByteArray[24];
BitUtils.SetBit(ref format, 0, BitUtils.GetBit(temp, 0));
BitUtils.SetBit(ref format, 1, BitUtils.GetBit(temp, 1));
BitUtils.SetBit(ref format, 2, BitUtils.GetBit(temp, 2));
BitUtils.SetBit(ref format, 3, BitUtils.GetBit(temp, 3));
var compression = new byte();
BitUtils.SetBit(ref compression, 4, BitUtils.GetBit(temp, 4));
BitUtils.SetBit(ref compression, 5, BitUtils.GetBit(temp, 5));
BitUtils.SetBit(ref compression, 6, BitUtils.GetBit(temp, 6));
var flags = new Flags
{
DataFormat = (DataFormat)format,
Compression = (Compression)compression,
TypeCode = (TypeCode)(converter.ToUInt16(legacyByteArray.AsSpan(26)) & 0xff),
};
var transcoder = new DefaultTranscoder(new DefaultConverter());
var result = transcoder.Decode <byte[]>(legacyByteArray.AsMemory(28, 4), flags, OpCode.Get);
Assert.Equal("test", Encoding.UTF8.GetString(result));
}
public void Test_GetBit(byte value, int position, bool expected)
{
var actual = BitUtils.GetBit(value, position);
Assert.Equal(expected, actual);
}
