// static methods
/// <summary>
/// Backpatches the size.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="startPosition">The start position.</param>
public static void BackpatchSize(this BsonStream stream, long startPosition)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (startPosition < 0 || startPosition > stream.Length)
{
throw new ArgumentOutOfRangeException("startPosition");
}
var size = stream.Position - startPosition;
if (size > int.MaxValue)
{
var message = string.Format("Size {0} is larger than {1} (Int32.MaxValue).", size, int.MaxValue);
throw new FormatException(message);
}
var endPosition = stream.Position;
stream.Position = startPosition;
stream.WriteInt32((int)size);
stream.Position = endPosition;
}
/// <summary>
/// Writes bytes to the stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="buffer">The buffer.</param>
/// <param name="offset">The offset.</param>
/// <param name="count">The count.</param>
public static void WriteBytes(this BsonStream stream, byte[] buffer, int offset, int count)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (offset < 0 || offset > buffer.Length)
{
throw new ArgumentOutOfRangeException("offset");
}
if (count < 0 || offset + count > buffer.Length)
{
throw new ArgumentOutOfRangeException("count");
}
if (count == 1)
{
stream.WriteByte(buffer[offset]);
}
else
{
stream.Write(buffer, offset, count);
}
}
/// <summary>
/// Writes a BsonType to the stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="value">The value.</param>
public static void WriteBsonType(this BsonStream stream, BsonType value)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
stream.WriteByte((byte)value);
}
/// <summary>
/// Writes a boolean to the stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="value">The value.</param>
public static void WriteBoolean(this BsonStream stream, bool value)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
stream.WriteByte(value ? (byte)1 : (byte)0);
}
/// <summary>
/// Reads a boolean from the stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>A boolean.</returns>
public static bool ReadBoolean(this BsonStream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var b = stream.ReadByte();
if (b == -1)
{
throw new EndOfStreamException();
}
return(b != 0);
}
/// <summary>
/// Reads the binary sub type.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>The binary sub type.</returns>
public static BsonBinarySubType ReadBinarySubType(this BsonStream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var b = stream.ReadByte();
if (b == -1)
{
throw new EndOfStreamException();
}
return((BsonBinarySubType)b);
}
/// <summary>
/// Reads bytes from the stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="count">The count.</param>
/// <returns>The bytes.</returns>
public static byte[] ReadBytes(this BsonStream stream, int count)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (count < 0)
{
throw new ArgumentOutOfRangeException("count");
}
var bytes = new byte[count];
stream.ReadBytes(bytes, 0, count);
return(bytes);
}
// public methods
/// <summary>
/// Reads the name.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="encoding">The encoding.</param>
/// <returns>
/// The name.
/// </returns>
public string Decode(BsonStream stream, UTF8Encoding encoding)
{
BsonTrieNode <TValue> node;
if (_trie.TryGetNode(stream, out node))
{
if (node.HasValue)
{
_found = true;
_value = node.Value;
return(node.ElementName);
}
}
return(stream.ReadCString(encoding));
}
/// <summary>
/// Initializes a new instance of the BsonBinaryReader class.
/// </summary>
/// <param name="stream">A stream (BsonBinary does not own the stream and will not Dispose it).</param>
/// <param name="settings">A BsonBinaryReaderSettings.</param>
public BsonBinaryReader(Stream stream, BsonBinaryReaderSettings settings)
: base(settings)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (!stream.CanSeek)
{
throw new ArgumentException("The stream must be capable of seeking.", "stream");
}
_baseStream = stream;
_bsonStream = (stream as BsonStream) ?? new BsonStreamAdapter(stream);
_context = new BsonBinaryReaderContext(null, ContextType.TopLevel, 0, 0);
}
// static methods
/// <summary>
/// Backpatches the size.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="startPosition">The start position.</param>
public static void BackpatchSize(this BsonStream stream, long startPosition)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (startPosition < 0 || startPosition > stream.Length)
{
throw new ArgumentOutOfRangeException("startPosition");
}
var endPosition = stream.Position;
var size = (int)(endPosition - startPosition);
stream.Position = startPosition;
stream.WriteInt32(size);
stream.Position = endPosition;
}
/// <summary>
/// Initializes a new instance of the BsonBinaryReader class.
/// </summary>
/// <param name="stream">A stream (BsonBinary does not own the stream and will not Dispose it).</param>
/// <param name="settings">A BsonBinaryReaderSettings.</param>
public BsonBinaryReader(Stream stream, BsonBinaryReaderSettings settings)
: base(settings)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (!stream.CanSeek)
{
throw new ArgumentException("The stream must be capable of seeking.", "stream");
}
_baseStream = stream;
_bsonStream = (stream as BsonStream) ?? new BsonStreamAdapter(stream);
_settings = settings; // already frozen by base class
_context = new BsonBinaryReaderContext(null, ContextType.TopLevel, 0, 0);
}
/// <summary>
/// Reads bytes from the stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="buffer">The buffer.</param>
/// <param name="offset">The offset.</param>
/// <param name="count">The count.</param>
public static void ReadBytes(this BsonStream stream, byte[] buffer, int offset, int count)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (buffer == null)
{
throw new ArgumentNullException("buffer");
}
if (offset < 0 || offset > buffer.Length)
{
throw new ArgumentOutOfRangeException("offset");
}
if (count < 0 || offset + count > buffer.Length)
{
throw new ArgumentOutOfRangeException("count");
}
if (count == 1)
{
var b = stream.ReadByte();
if (b == -1)
{
throw new EndOfStreamException();
}
buffer[offset] = (byte)b;
}
else
{
while (count > 0)
{
var bytesRead = stream.Read(buffer, offset, count);
if (bytesRead == 0)
{
throw new EndOfStreamException();
}
offset += bytesRead;
count -= bytesRead;
}
}
}
/// <summary>
/// Reads the BSON type.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>The BSON type.</returns>
public static BsonType ReadBsonType(this BsonStream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var b = stream.ReadByte();
if (b == -1)
{
throw new EndOfStreamException();
}
if (!__validBsonTypes[b])
{
string message = string.Format("Invalid BsonType: {0}.", b);
throw new FormatException(message);
}
return((BsonType)b);
}
/// <summary>
/// Initializes a new instance of the BsonBinaryWriter class.
/// </summary>
/// <param name="stream">A stream. The BsonBinaryWriter does not own the stream and will not Dispose it.</param>
/// <param name="settings">The BsonBinaryWriter settings.</param>
public BsonBinaryWriter(Stream stream, BsonBinaryWriterSettings settings)
: base(settings)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (!stream.CanSeek)
{
throw new ArgumentException("The stream must be capable of seeking.", "stream");
}
_baseStream = stream;
_bsonStream = (stream as BsonStream) ?? new BsonStreamAdapter(stream);
_settings = settings; // already frozen by base class
_maxDocumentSizeStack.Push(_settings.MaxDocumentSize);
_context = null;
State = BsonWriterState.Initial;
}
/// <summary>
/// Reads the BSON type.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>The BSON type.</returns>
public static BsonType ReadBsonType(this BsonStream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var b = stream.ReadByte();
if (b == -1)
{
throw new EndOfStreamException();
}
if (!__validBsonTypes[b])
{
var message = string.Format("Detected unknown BSON type \"\\x{0:x2}\". Are you using the latest driver version?", b);
throw new FormatException(message);
}
return((BsonType)b);
}
/// <summary>
/// Writes a slice to the stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="slice">The slice.</param>
public static void WriteSlice(this BsonStream stream, IByteBuffer slice)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (slice == null)
{
throw new ArgumentNullException("slice");
}
var position = 0;
var count = slice.Length;
while (count > 0)
{
var segment = slice.AccessBackingBytes(position);
var partialCount = Math.Min(count, segment.Count);
stream.WriteBytes(segment.Array, segment.Offset, partialCount);
position += count;
count -= partialCount;
}
}
/// <summary>
/// Reads a boolean from the stream.
/// </summary>
/// <param name="stream">The stream.</param>
/// <returns>A boolean.</returns>
public static bool ReadBoolean(this BsonStream stream)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
var b = stream.ReadByte();
switch (b)
{
case -1:
throw new EndOfStreamException();
case 0:
return(false);
case 1:
return(true);
default:
throw new FormatException($"Invalid BsonBoolean value: {b}.");
}
}
// public methods
/// <summary>
/// Decodes the name.
/// </summary>
/// <param name="stream">The stream.</param>
/// <param name="encoding">The encoding.</param>
/// <returns>
/// The name.
/// </returns>
public string Decode(BsonStream stream, UTF8Encoding encoding)
{
var utf8 = stream.ReadCStringBytes();
return Utf8Helper.DecodeUtf8String(utf8.Array, utf8.Offset, utf8.Count, encoding);
}
