// internal methods
internal virtual void ReadHeaderFrom(BsonStreamReader streamReader)
{
_messageLength = streamReader.ReadInt32();
_requestId = streamReader.ReadInt32();
_responseTo = streamReader.ReadInt32();
if ((MessageOpcode)streamReader.ReadInt32() != _opcode)
{
throw new FileFormatException("Message header opcode is not the expected one.");
}
}
/// <summary>
/// Reads a BSON Int32 from the reader.
/// </summary>
/// <returns>An Int32.</returns>
public override int ReadInt32()
{
if (Disposed)
{
ThrowObjectDisposedException();
}
VerifyBsonType("ReadInt32", BsonType.Int32);
State = GetNextState();
return(_streamReader.ReadInt32());
}
/// <summary>
/// Loads a byte buffer from a stream (the first 4 bytes in the stream are the length of the data).
/// Depending on the required capacity, either a SingleChunkBuffer or a MultiChunkBuffer will be created.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>A buffer.</returns>
/// <exception cref="System.ArgumentNullException">stream</exception>
public static IByteBuffer LoadLengthPrefixedDataFrom(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var streamReader = new BsonStreamReader(stream, Utf8Helper.StrictUtf8Encoding);
var length = streamReader.ReadInt32();
var byteBuffer = Create(BsonChunkPool.Default, length);
byteBuffer.Length = length;
byteBuffer.WriteBytes(0, BitConverter.GetBytes(length), 0, 4);
byteBuffer.LoadFrom(stream, 4, length - 4);
byteBuffer.MakeReadOnly();
return byteBuffer;
}
/// <summary>
/// Loads a byte buffer from a stream (the first 4 bytes in the stream are the length of the data).
/// Depending on the required capacity, either a SingleChunkBuffer or a MultiChunkBuffer will be created.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>A buffer.</returns>
/// <exception cref="System.ArgumentNullException">stream</exception>
public static IByteBuffer LoadLengthPrefixedDataFrom(Stream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var streamReader = new BsonStreamReader(stream, Utf8Helper.StrictUtf8Encoding);
var length = streamReader.ReadInt32();
var byteBuffer = Create(BsonChunkPool.Default, length);
byteBuffer.Length = length;
byteBuffer.WriteBytes(0, BitConverter.GetBytes(length), 0, 4);
byteBuffer.LoadFrom(stream, 4, length - 4);
byteBuffer.MakeReadOnly();
return(byteBuffer);
}