public static TItem Get <TItem>(this IDb db, Keccak key, IRlpStreamDecoder <TItem> decoder, ICache <Keccak, TItem> cache = null, bool shouldCache = true) where TItem : class
{
TItem item = cache?.Get(key);
if (item is null)
{
if (db is IDbWithSpan spanDb && decoder is IRlpValueDecoder <TItem> valueDecoder)
{
Span <byte> data = spanDb.GetSpan(key);
if (data.IsNullOrEmpty())
{
return(null);
}
try
{
var rlpValueContext = data.AsRlpValueContext();
item = valueDecoder.Decode(ref rlpValueContext, RlpBehaviors.AllowExtraData);
}
finally
{
spanDb.DangerousReleaseMemory(data);
}
}
else
{
byte[]? data = db.Get(key);
if (data is null)
{
return(null);
}
item = decoder.Decode(data.AsRlpStream(), RlpBehaviors.AllowExtraData);
}
}
public static T[] DecodeArray <T>(this IRlpStreamDecoder <T> decoder, RlpStream rlpStream, RlpBehaviors rlpBehaviors = RlpBehaviors.None)
{
int checkPosition = rlpStream.ReadSequenceLength() + rlpStream.Position;
T[] result = new T[rlpStream.ReadNumberOfItemsRemaining(checkPosition)];
for (int i = 0; i < result.Length; i++)
{
result[i] = decoder.Decode(rlpStream, rlpBehaviors);
}
return(result);
}
