public static ReadOnlySpan <byte> UnpackBytes(DcPackerInterface pi, ReadOnlySpan <byte> buffer)
{
if (pi.HasFixedByteSize && pi.HasFixedStructure)
{
return(buffer.Slice(0, pi.FixedByteSize));
}
if (pi.PackType == DcPackType.Array || pi.PackType == DcPackType.Blob || pi.PackType == DcPackType.String)
{
var length = pi.NumLengthBytes switch {
2 => BinaryPrimitives.ReadUInt16LittleEndian(buffer),
4 => BinaryPrimitives.ReadUInt32LittleEndian(buffer),
_ => throw new Exception()
};
return(buffer.Slice(0, (int)(pi.NumLengthBytes + length)));
}
var offset = 0;
if (pi.HasNestedFields)
{
for (var i = 0; i < pi.NumNestedFields; i++)
{
var f = pi.GetNestedField(i);
var d = UnpackBytes(f, buffer.Slice(offset));
offset += d.Length;
}
}
return(buffer.Slice(0, offset));
}
public static object ReadObject(this MemoryBufferReader reader, DcPackerInterface pi)
{
var spanReader = new SpanBufferReader(reader.RemainingData.Span);
var value = spanReader.ReadObject(pi);
reader.SkipBytes(spanReader.Offset);
return(value);
}
public static ReadOnlyMemory <byte> UnpackBytes(DcPackerInterface pi, ReadOnlyMemory <byte> buffer)
{
var s = UnpackBytes(pi, buffer.Span);
return(buffer.Slice(0, s.Length));
}