public static Header ReadHeader(ref ReadableBuffer buffer, ref HeaderTable headerTable, IBufferPool memoryPool)
{
int firstByte = buffer.Peek();
if (firstByte < 0)
{
ThrowEndOfStreamException();
}
buffer = buffer.Slice(1);
if ((firstByte & 0x80) != 0)
{
// 6.1. Indexed Header Field Representation
return(headerTable.GetHeader(ReadUInt32(ref buffer, firstByte, 7)));
}
else if ((firstByte & 0x40) != 0)
{
// 6.2.1. Literal Header Field with Incremental Indexing
var result = ReadHeader(ref buffer, ref headerTable, firstByte, 6, HeaderOptions.IndexAddNewValue);
headerTable = headerTable.Add(result, memoryPool);
return(result);
}
else if ((firstByte & 0x20) != 0)
{
// 6.3. Dynamic Table Size Update
var newSize = ReadInt32(ref buffer, firstByte, 5);
headerTable = headerTable.SetMaxLength(newSize, memoryPool);
return(Header.Resize(newSize));
}
else
{
// 6.2.2.Literal Header Field without Indexing
// 6.2.3.Literal Header Field Never Indexed
return(ReadHeader(ref buffer, ref headerTable, firstByte, 4,
(firstByte & 0x10) == 0
? HeaderOptions.IndexNotIndexed
: HeaderOptions.IndexNeverIndexed));
}
}
