/// <summary>
/// Reads a BSON string from the stream.
/// </summary>
/// <param name="encoding">The encoding.</param>
/// <returns>
/// A string.
/// </returns>
/// <exception cref="System.ArgumentNullException">encoding</exception>
/// <exception cref="System.FormatException"></exception>
/// <exception cref="System.IO.EndOfStreamException"></exception>
string IBsonStream.ReadBsonString(UTF8Encoding encoding)
{
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
if (!_isOpen)
{
StreamIsClosed();
}
var length = ((IBsonStream)this).ReadBsonInt32();
if (length <= 0)
{
var message = string.Format("Invalid string length: {0}.", length);
throw new FormatException(message);
}
if (_buffer[_position + length - 1] != 0)
{
throw new FormatException("String is missing terminating null byte.");
}
var position = _position;
if ((_position += length) > _length)
{
_position = _length;
throw new EndOfStreamException();
}
return(Utf8Helper.DecodeUtf8String(_buffer, position, length - 1, encoding));
}
/// <summary>
/// Reads a BSON CString from the stream.
/// </summary>
/// <returns>A string.</returns>
/// <exception cref="System.ArgumentNullException">
/// stream
/// or
/// encoding
/// </exception>
/// <exception cref="System.IO.EndOfStreamException"></exception>
public string ReadCString()
{
if (_bsonStream != null)
{
return(_bsonStream.ReadBsonCString());
}
else
{
var memoryStream = new MemoryStream(32); // override default capacity of zero
while (true)
{
var b = _stream.ReadByte();
if (b == -1)
{
throw new EndOfStreamException();
}
else if (b == 0)
{
break;
}
else
{
memoryStream.WriteByte((byte)b);
}
}
return(Utf8Helper.DecodeUtf8String(memoryStream.GetBuffer(), 0, (int)memoryStream.Length, Utf8Helper.StrictUtf8Encoding));
}
}
/// <inheritdoc/>
public override string ReadCString(UTF8Encoding encoding)
{
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
ThrowIfDisposed();
var bytes = ReadCStringBytes();
return(Utf8Helper.DecodeUtf8String(bytes.Array, bytes.Offset, bytes.Count, encoding));
}
// explicit interface implementations
/// <summary>
/// Reads a BSON CString from the stream.
/// </summary>
/// <returns>
/// A string.
/// </returns>
/// <exception cref="System.ArgumentNullException">encoding</exception>
string IBsonStream.ReadBsonCString()
{
if (!_isOpen)
{
StreamIsClosed();
}
var nullPosition = FindNullByte();
var position = _position;
var length = nullPosition - position + 1; // read null byte also
_position = nullPosition + 1;
return(Utf8Helper.DecodeUtf8String(_buffer, position, length - 1, Utf8Helper.StrictUtf8Encoding)); // don't decode null byte
}
/// <inheritdoc/>
public override string ReadString(UTF8Encoding encoding)
{
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
ThrowIfDisposed();
var length = ReadInt32();
if (length <= 0)
{
var message = string.Format("Invalid string length: {0}.", length);
throw new FormatException(message);
}
var segment = _buffer.AccessBackingBytes(_position);
if (segment.Count >= length)
{
ThrowIfEndOfStream(length);
if (segment.Array[segment.Offset + length - 1] != 0)
{
throw new FormatException("String is missing terminating null byte.");
}
_position += length;
return(Utf8Helper.DecodeUtf8String(segment.Array, segment.Offset, length - 1, encoding));
}
else
{
using var rentedBuffer = ThreadStaticBuffer.RentBuffer(length);
var bytes = rentedBuffer.Bytes;
this.ReadBytes(bytes, 0, length);
if (bytes[length - 1] != 0)
{
throw new FormatException("String is missing terminating null byte.");
}
return(Utf8Helper.DecodeUtf8String(bytes, 0, length - 1, encoding));
}
}
// explicit interface implementations
/// <summary>
/// Reads a BSON CString from the stream.
/// </summary>
/// <returns>
/// A string.
/// </returns>
/// <exception cref="System.ArgumentNullException">encoding</exception>
/// <exception cref="System.FormatException">CString is missing terminating null byte.</exception>
string IBsonStream.ReadBsonCString()
{
ThrowIfDisposed();
ThrowIfEndOfStream(1);
var nullPosition = FindNullByte();
var length = nullPosition - _position + 1; // read null byte also
var segment = _byteBuffer.AccessBackingBytes(_position);
if (segment.Count >= length)
{
_position += length;
return(Utf8Helper.DecodeUtf8String(segment.Array, segment.Offset, length - 1, Utf8Helper.StrictUtf8Encoding)); // don't decode null byte
}
else
{
var bytes = ReadBytes(length);
return(Utf8Helper.DecodeUtf8String(bytes, 0, length - 1, Utf8Helper.StrictUtf8Encoding)); // don't decode null byte
}
}
/// <summary>
/// Reads a BSON string from the stream.
/// </summary>
/// <param name="encoding">The encoding.</param>
/// <returns>
/// A string.
/// </returns>
/// <exception cref="System.ArgumentNullException">encoding</exception>
/// <exception cref="System.FormatException">
/// String is missing terminating null byte.
/// or
/// String is missing terminating null byte.
/// </exception>
string IBsonStream.ReadBsonString(UTF8Encoding encoding)
{
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
var length = ((IBsonStream)this).ReadBsonInt32();
if (length <= 0)
{
var message = string.Format("Invalid string length: {0}.", length);
throw new FormatException(message);
}
var segment = _byteBuffer.AccessBackingBytes(_position);
if (segment.Count >= length)
{
if (segment.Array[segment.Offset + length - 1] != 0)
{
throw new FormatException("String is missing terminating null byte.");
}
_position += length;
return(Utf8Helper.DecodeUtf8String(segment.Array, segment.Offset, length - 1, encoding));
}
else
{
var bytes = ReadBytes(length);
if (bytes[length - 1] != 0)
{
throw new FormatException("String is missing terminating null byte.");
}
return(Utf8Helper.DecodeUtf8String(bytes, 0, length - 1, encoding));
}
}
/// <summary>
/// Reads a BSON string from the stream.
/// </summary>
///
/// <returns>A string.</returns>
/// <exception cref="System.ArgumentNullException">
/// stream
/// or
/// encoding
/// </exception>
/// <exception cref="System.FormatException">
/// String is missing null terminator byte.
/// </exception>
public string ReadString()
{
if (_bsonStream != null)
{
return(_bsonStream.ReadBsonString(_encoding));
}
else
{
var length = ReadInt32();
if (length < 1)
{
var message = string.Format("Invalid string length: {0}.", length);
throw new FormatException(message);
}
var bytes = ReadBytes(length); // read the null byte also (included in length)
if (bytes[length - 1] != 0)
{
throw new FormatException("String is missing terminating null byte.");
}
return(Utf8Helper.DecodeUtf8String(bytes, 0, length - 1, _encoding)); // don't decode the null byte
}
}
// 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));
}
/// <summary>
/// Reads a BSON CString from the stream.
/// </summary>
/// <returns>A string.</returns>
public string ReadCString()
{
var utf8 = ReadCStringBytes();
return(Utf8Helper.DecodeUtf8String(utf8.Array, utf8.Offset, utf8.Count, Utf8Encodings.Strict));
}
// public methods
/// <summary>
/// Decodes the name.
/// </summary>
/// <param name="streamReader">The stream reader.</param>
/// <returns>
/// The name.
/// </returns>
public string Decode(BsonStreamReader streamReader)
{
var utf8 = streamReader.ReadCStringBytes();
return(Utf8Helper.DecodeUtf8String(utf8.Array, utf8.Offset, utf8.Count, Utf8Helper.StrictUtf8Encoding));
}
