protected static int GetContentLength(
IBinaryReadStream reader,
int lengthLength,
int offset)
{
switch (lengthLength)
{
case 1:
return(reader.GetUInt8(offset));
case 2:
return(reader.GetUInt16(offset));
case 4:
return((int)reader.GetUInt32(offset));
default:
throw new NotImplementedException();
}
}
public static bool TryGet(
IBinaryReadStream reader,
RecordType expectedHeader,
out long contentLength,
long lengthLength)
{
if (reader.Remaining < Constants.HeaderLength + lengthLength)
{
contentLength = -1;
return(false);
}
var header = reader.GetInt32();
if (expectedHeader.TypeInt != header)
{
contentLength = -1;
return(false);
}
switch (lengthLength)
{
case 1:
contentLength = reader.GetUInt8(offset: Constants.HeaderLength);
break;
case 2:
contentLength = reader.GetUInt16(offset: Constants.HeaderLength);
break;
case 4:
contentLength = reader.GetUInt32(offset: Constants.HeaderLength);
break;
default:
throw new NotImplementedException();
}
return(true);
}