Newtonsoft.Json.JsonTextReader.ReadChars C# (CSharp) Method

        private bool ReadChars(int relativePosition, bool append)
        {
            if (_isEndOfFile)
            {
                return false;
            }

            int charsRequired = _charPos + relativePosition - _charsUsed + 1;

            int totalCharsRead = 0;

            // it is possible that the TextReader doesn't return all data at once
            // repeat read until the required text is returned or the reader is out of content
            do
            {
                int charsRead = ReadData(append, charsRequired - totalCharsRead);

                // no more content
                if (charsRead == 0)
                {
                    break;
                }

                totalCharsRead += charsRead;
            } while (totalCharsRead < charsRequired);

            if (totalCharsRead < charsRequired)
            {
                return false;
            }
            return true;
        }