public static void ValidateValue(ref ReadOnlySpan <byte> value)
{
// TODO: Use throw helper with proper error messages
if (value.Length > JsonConstants.MaxTokenSize)
{
JsonThrowHelper.ThrowArgumentException("Argument too large.");
}
}
public static void ValidateProperty(ref ReadOnlySpan <char> propertyName)
{
// TODO: Use throw helper with proper error messages
if (propertyName.Length > JsonConstants.MaxCharacterTokenSize)
{
JsonThrowHelper.ThrowArgumentException("Argument too large.");
}
}
public static void ValidatePropertyAndValue(ref ReadOnlySpan <byte> propertyName, ref ReadOnlySpan <byte> value)
{
// TODO: Use throw helper with proper error messages
if (propertyName.Length > JsonConstants.MaxTokenSize || value.Length > JsonConstants.MaxTokenSize)
{
JsonThrowHelper.ThrowArgumentException(propertyName, value);
}
}
public Utf8JsonReaderStream(Stream jsonStream)
{
if (!jsonStream.CanRead || !jsonStream.CanSeek)
JsonThrowHelper.ThrowArgumentException("Stream must be readable and seekable.");
_pooledArray = ArrayPool<byte>.Shared.Rent(FirstSegmentSize);
int numberOfBytes = jsonStream.Read(_pooledArray, 0, FirstSegmentSize);
_buffer = _pooledArray.AsSpan(0, numberOfBytes);
_stream = jsonStream;
_isFinalBlock = numberOfBytes == 0;
_jsonReader = new Utf8JsonReader(_buffer, _isFinalBlock);
_consumed = 0;
}
private bool ReadNext()
{
bool result = false;
do
{
_consumed += _jsonReader.BytesConsumed;
int leftOver = _buffer.Length - (int)_jsonReader.BytesConsumed;
int amountToRead = StreamSegmentSize;
if (leftOver > 0)
{
_stream.Position -= leftOver;
if (_jsonReader.BytesConsumed == 0)
{
if (leftOver > 1_000_000_000)
{
JsonThrowHelper.ThrowArgumentException("Cannot fit left over data from the previous chunk and the next chunk of data into a 2 GB buffer.");
}
// This is guaranteed to not overflow due to the check above.
amountToRead += leftOver * 2;
ResizeBuffer(amountToRead);
}
}
if (_pooledArray.Length < StreamSegmentSize)
{
ResizeBuffer(StreamSegmentSize);
}
int numberOfBytes = _stream.Read(_pooledArray, 0, amountToRead);
_isFinalBlock = numberOfBytes == 0; // TODO: Can this be inferred differently based on leftOver and numberOfBytes
_buffer = _pooledArray.AsSpan(0, numberOfBytes);
_jsonReader = new JsonUtf8Reader(_buffer, _isFinalBlock, _jsonReader.CurrentState);
result = _jsonReader.Read();
} while (!result && !_isFinalBlock);
return(result);
}