2601 lines
97 KiB
C#
2601 lines
97 KiB
C#
#region License
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// Copyright (c) 2007 James Newton-King
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//
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// Permission is hereby granted, free of charge, to any person
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// obtaining a copy of this software and associated documentation
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// files (the "Software"), to deal in the Software without
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// restriction, including without limitation the rights to use,
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// copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following
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// conditions:
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//
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// The above copyright notice and this permission notice shall be
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// included in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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#endregion
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using System;
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using System.Runtime.CompilerServices;
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using System.IO;
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using System.Globalization;
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#if HAVE_BIG_INTEGER
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using System.Numerics;
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#endif
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using LC.Newtonsoft.Json.Utilities;
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namespace LC.Newtonsoft.Json
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{
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internal enum ReadType
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{
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Read,
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ReadAsInt32,
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ReadAsInt64,
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ReadAsBytes,
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ReadAsString,
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ReadAsDecimal,
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ReadAsDateTime,
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#if HAVE_DATE_TIME_OFFSET
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ReadAsDateTimeOffset,
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#endif
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ReadAsDouble,
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ReadAsBoolean
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}
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/// <summary>
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/// Represents a reader that provides fast, non-cached, forward-only access to JSON text data.
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/// </summary>
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public partial class JsonTextReader : JsonReader, IJsonLineInfo
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{
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private const char UnicodeReplacementChar = '\uFFFD';
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#if HAVE_BIG_INTEGER
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private const int MaximumJavascriptIntegerCharacterLength = 380;
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#endif
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#if DEBUG
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internal int LargeBufferLength { get; set; } = int.MaxValue / 2;
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#else
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private const int LargeBufferLength = int.MaxValue / 2;
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#endif
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private readonly TextReader _reader;
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private char[] _chars;
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private int _charsUsed;
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private int _charPos;
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private int _lineStartPos;
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private int _lineNumber;
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private bool _isEndOfFile;
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private StringBuffer _stringBuffer;
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private StringReference _stringReference;
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private IArrayPool<char> _arrayPool;
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/// <summary>
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/// Initializes a new instance of the <see cref="JsonTextReader"/> class with the specified <see cref="TextReader"/>.
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/// </summary>
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/// <param name="reader">The <see cref="TextReader"/> containing the JSON data to read.</param>
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public JsonTextReader(TextReader reader)
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{
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if (reader == null)
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{
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throw new ArgumentNullException(nameof(reader));
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}
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_reader = reader;
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_lineNumber = 1;
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#if HAVE_ASYNC
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_safeAsync = GetType() == typeof(JsonTextReader);
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#endif
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}
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#if DEBUG
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internal char[] CharBuffer
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{
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get => _chars;
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set => _chars = value;
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}
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internal int CharPos => _charPos;
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#endif
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/// <summary>
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/// Gets or sets the reader's property name table.
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/// </summary>
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public JsonNameTable PropertyNameTable { get; set; }
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/// <summary>
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/// Gets or sets the reader's character buffer pool.
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/// </summary>
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public IArrayPool<char> ArrayPool
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{
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get => _arrayPool;
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set
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{
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if (value == null)
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{
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throw new ArgumentNullException(nameof(value));
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}
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_arrayPool = value;
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}
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}
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private void EnsureBufferNotEmpty()
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{
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if (_stringBuffer.IsEmpty)
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{
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_stringBuffer = new StringBuffer(_arrayPool, 1024);
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}
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}
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private void SetNewLine(bool hasNextChar)
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{
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if (hasNextChar && _chars[_charPos] == StringUtils.LineFeed)
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{
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_charPos++;
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}
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OnNewLine(_charPos);
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}
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private void OnNewLine(int pos)
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{
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_lineNumber++;
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_lineStartPos = pos;
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}
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private void ParseString(char quote, ReadType readType)
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{
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_charPos++;
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ShiftBufferIfNeeded();
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ReadStringIntoBuffer(quote);
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ParseReadString(quote, readType);
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}
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private void ParseReadString(char quote, ReadType readType)
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{
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SetPostValueState(true);
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switch (readType)
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{
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case ReadType.ReadAsBytes:
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Guid g;
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byte[] data;
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if (_stringReference.Length == 0)
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{
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data = CollectionUtils.ArrayEmpty<byte>();
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}
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else if (_stringReference.Length == 36 && ConvertUtils.TryConvertGuid(_stringReference.ToString(), out g))
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{
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data = g.ToByteArray();
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}
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else
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{
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data = Convert.FromBase64CharArray(_stringReference.Chars, _stringReference.StartIndex, _stringReference.Length);
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}
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SetToken(JsonToken.Bytes, data, false);
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break;
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case ReadType.ReadAsString:
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string text = _stringReference.ToString();
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SetToken(JsonToken.String, text, false);
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_quoteChar = quote;
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break;
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case ReadType.ReadAsInt32:
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case ReadType.ReadAsDecimal:
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case ReadType.ReadAsBoolean:
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// caller will convert result
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break;
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default:
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if (_dateParseHandling != DateParseHandling.None)
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{
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DateParseHandling dateParseHandling;
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if (readType == ReadType.ReadAsDateTime)
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{
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dateParseHandling = DateParseHandling.DateTime;
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}
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#if HAVE_DATE_TIME_OFFSET
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else if (readType == ReadType.ReadAsDateTimeOffset)
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{
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dateParseHandling = DateParseHandling.DateTimeOffset;
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}
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#endif
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else
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{
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dateParseHandling = _dateParseHandling;
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}
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if (dateParseHandling == DateParseHandling.DateTime)
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{
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if (DateTimeUtils.TryParseDateTime(_stringReference, DateTimeZoneHandling, DateFormatString, Culture, out DateTime dt))
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{
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SetToken(JsonToken.Date, dt, false);
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return;
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}
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}
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#if HAVE_DATE_TIME_OFFSET
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else
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{
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if (DateTimeUtils.TryParseDateTimeOffset(_stringReference, DateFormatString, Culture, out DateTimeOffset dt))
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{
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SetToken(JsonToken.Date, dt, false);
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return;
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}
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}
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#endif
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}
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SetToken(JsonToken.String, _stringReference.ToString(), false);
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_quoteChar = quote;
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break;
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}
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}
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private static void BlockCopyChars(char[] src, int srcOffset, char[] dst, int dstOffset, int count)
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{
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const int charByteCount = 2;
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Buffer.BlockCopy(src, srcOffset * charByteCount, dst, dstOffset * charByteCount, count * charByteCount);
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}
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private void ShiftBufferIfNeeded()
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{
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// once in the last 10% of the buffer, or buffer is already very large then
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// shift the remaining content to the start to avoid unnecessarily increasing
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// the buffer size when reading numbers/strings
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int length = _chars.Length;
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if (length - _charPos <= length * 0.1 || length >= LargeBufferLength)
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{
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int count = _charsUsed - _charPos;
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if (count > 0)
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{
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BlockCopyChars(_chars, _charPos, _chars, 0, count);
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}
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_lineStartPos -= _charPos;
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_charPos = 0;
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_charsUsed = count;
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_chars[_charsUsed] = '\0';
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}
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}
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private int ReadData(bool append)
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{
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return ReadData(append, 0);
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}
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private void PrepareBufferForReadData(bool append, int charsRequired)
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{
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// char buffer is full
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if (_charsUsed + charsRequired >= _chars.Length - 1)
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{
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if (append)
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{
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int doubledArrayLength = _chars.Length * 2;
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// copy to new array either double the size of the current or big enough to fit required content
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int newArrayLength = Math.Max(
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doubledArrayLength < 0 ? int.MaxValue : doubledArrayLength, // handle overflow
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_charsUsed + charsRequired + 1);
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// increase the size of the buffer
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char[] dst = BufferUtils.RentBuffer(_arrayPool, newArrayLength);
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BlockCopyChars(_chars, 0, dst, 0, _chars.Length);
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BufferUtils.ReturnBuffer(_arrayPool, _chars);
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_chars = dst;
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}
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else
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{
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int remainingCharCount = _charsUsed - _charPos;
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if (remainingCharCount + charsRequired + 1 >= _chars.Length)
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{
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// the remaining count plus the required is bigger than the current buffer size
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char[] dst = BufferUtils.RentBuffer(_arrayPool, remainingCharCount + charsRequired + 1);
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if (remainingCharCount > 0)
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{
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BlockCopyChars(_chars, _charPos, dst, 0, remainingCharCount);
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}
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BufferUtils.ReturnBuffer(_arrayPool, _chars);
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_chars = dst;
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}
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else
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{
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// copy any remaining data to the beginning of the buffer if needed and reset positions
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if (remainingCharCount > 0)
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{
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BlockCopyChars(_chars, _charPos, _chars, 0, remainingCharCount);
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}
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}
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_lineStartPos -= _charPos;
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_charPos = 0;
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_charsUsed = remainingCharCount;
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}
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}
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}
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private int ReadData(bool append, int charsRequired)
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{
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if (_isEndOfFile)
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{
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return 0;
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}
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PrepareBufferForReadData(append, charsRequired);
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int attemptCharReadCount = _chars.Length - _charsUsed - 1;
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int charsRead = _reader.Read(_chars, _charsUsed, attemptCharReadCount);
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_charsUsed += charsRead;
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if (charsRead == 0)
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{
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_isEndOfFile = true;
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}
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_chars[_charsUsed] = '\0';
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return charsRead;
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}
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private bool EnsureChars(int relativePosition, bool append)
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{
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if (_charPos + relativePosition >= _charsUsed)
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{
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return ReadChars(relativePosition, append);
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}
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return true;
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}
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private bool ReadChars(int relativePosition, bool append)
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{
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if (_isEndOfFile)
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{
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return false;
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}
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int charsRequired = _charPos + relativePosition - _charsUsed + 1;
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int totalCharsRead = 0;
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// it is possible that the TextReader doesn't return all data at once
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// repeat read until the required text is returned or the reader is out of content
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do
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{
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int charsRead = ReadData(append, charsRequired - totalCharsRead);
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// no more content
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if (charsRead == 0)
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{
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break;
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}
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totalCharsRead += charsRead;
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} while (totalCharsRead < charsRequired);
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if (totalCharsRead < charsRequired)
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{
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return false;
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}
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return true;
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}
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/// <summary>
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/// Reads the next JSON token from the underlying <see cref="TextReader"/>.
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/// </summary>
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/// <returns>
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/// <c>true</c> if the next token was read successfully; <c>false</c> if there are no more tokens to read.
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/// </returns>
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public override bool Read()
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{
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EnsureBuffer();
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while (true)
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{
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switch (_currentState)
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{
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case State.Start:
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case State.Property:
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case State.Array:
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case State.ArrayStart:
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case State.Constructor:
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case State.ConstructorStart:
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return ParseValue();
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case State.Object:
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case State.ObjectStart:
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return ParseObject();
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case State.PostValue:
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// returns true if it hits
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// end of object or array
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if (ParsePostValue(false))
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{
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return true;
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}
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break;
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case State.Finished:
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if (EnsureChars(0, false))
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{
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EatWhitespace();
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if (_isEndOfFile)
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{
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SetToken(JsonToken.None);
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return false;
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}
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if (_chars[_charPos] == '/')
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{
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ParseComment(true);
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return true;
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}
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throw JsonReaderException.Create(this, "Additional text encountered after finished reading JSON content: {0}.".FormatWith(CultureInfo.InvariantCulture, _chars[_charPos]));
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}
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SetToken(JsonToken.None);
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return false;
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default:
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throw JsonReaderException.Create(this, "Unexpected state: {0}.".FormatWith(CultureInfo.InvariantCulture, CurrentState));
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}
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}
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}
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/// <summary>
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/// Reads the next JSON token from the underlying <see cref="TextReader"/> as a <see cref="Nullable{T}"/> of <see cref="Int32"/>.
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/// </summary>
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/// <returns>A <see cref="Nullable{T}"/> of <see cref="Int32"/>. This method will return <c>null</c> at the end of an array.</returns>
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public override int? ReadAsInt32()
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{
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return (int?)ReadNumberValue(ReadType.ReadAsInt32);
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}
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/// <summary>
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/// Reads the next JSON token from the underlying <see cref="TextReader"/> as a <see cref="Nullable{T}"/> of <see cref="DateTime"/>.
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/// </summary>
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/// <returns>A <see cref="Nullable{T}"/> of <see cref="DateTime"/>. This method will return <c>null</c> at the end of an array.</returns>
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public override DateTime? ReadAsDateTime()
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{
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return (DateTime?)ReadStringValue(ReadType.ReadAsDateTime);
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}
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/// <summary>
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/// Reads the next JSON token from the underlying <see cref="TextReader"/> as a <see cref="String"/>.
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/// </summary>
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/// <returns>A <see cref="String"/>. This method will return <c>null</c> at the end of an array.</returns>
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public override string ReadAsString()
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{
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return (string)ReadStringValue(ReadType.ReadAsString);
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}
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/// <summary>
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/// Reads the next JSON token from the underlying <see cref="TextReader"/> as a <see cref="Byte"/>[].
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/// </summary>
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/// <returns>A <see cref="Byte"/>[] or <c>null</c> if the next JSON token is null. This method will return <c>null</c> at the end of an array.</returns>
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public override byte[] ReadAsBytes()
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{
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EnsureBuffer();
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bool isWrapped = false;
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switch (_currentState)
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{
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case State.PostValue:
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if (ParsePostValue(true))
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{
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return null;
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}
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goto case State.Start;
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case State.Start:
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case State.Property:
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case State.Array:
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case State.ArrayStart:
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case State.Constructor:
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case State.ConstructorStart:
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while (true)
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{
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char currentChar = _chars[_charPos];
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|
|
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switch (currentChar)
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{
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case '\0':
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if (ReadNullChar())
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{
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SetToken(JsonToken.None, null, false);
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return null;
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}
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break;
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case '"':
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case '\'':
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ParseString(currentChar, ReadType.ReadAsBytes);
|
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byte[] data = (byte[])Value;
|
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if (isWrapped)
|
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{
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ReaderReadAndAssert();
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if (TokenType != JsonToken.EndObject)
|
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{
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throw JsonReaderException.Create(this, "Error reading bytes. Unexpected token: {0}.".FormatWith(CultureInfo.InvariantCulture, TokenType));
|
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}
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SetToken(JsonToken.Bytes, data, false);
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}
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return data;
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case '{':
|
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_charPos++;
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SetToken(JsonToken.StartObject);
|
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ReadIntoWrappedTypeObject();
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isWrapped = true;
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break;
|
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case '[':
|
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_charPos++;
|
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SetToken(JsonToken.StartArray);
|
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return ReadArrayIntoByteArray();
|
|
case 'n':
|
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HandleNull();
|
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return null;
|
|
case '/':
|
|
ParseComment(false);
|
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break;
|
|
case ',':
|
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ProcessValueComma();
|
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break;
|
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case ']':
|
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_charPos++;
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if (_currentState == State.Array || _currentState == State.ArrayStart || _currentState == State.PostValue)
|
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{
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SetToken(JsonToken.EndArray);
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return null;
|
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}
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
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case StringUtils.CarriageReturn:
|
|
ProcessCarriageReturn(false);
|
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break;
|
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case StringUtils.LineFeed:
|
|
ProcessLineFeed();
|
|
break;
|
|
case ' ':
|
|
case StringUtils.Tab:
|
|
// eat
|
|
_charPos++;
|
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break;
|
|
default:
|
|
_charPos++;
|
|
|
|
if (!char.IsWhiteSpace(currentChar))
|
|
{
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
}
|
|
|
|
// eat
|
|
break;
|
|
}
|
|
}
|
|
case State.Finished:
|
|
ReadFinished();
|
|
return null;
|
|
default:
|
|
throw JsonReaderException.Create(this, "Unexpected state: {0}.".FormatWith(CultureInfo.InvariantCulture, CurrentState));
|
|
}
|
|
}
|
|
|
|
private object ReadStringValue(ReadType readType)
|
|
{
|
|
EnsureBuffer();
|
|
|
|
switch (_currentState)
|
|
{
|
|
case State.PostValue:
|
|
if (ParsePostValue(true))
|
|
{
|
|
return null;
|
|
}
|
|
goto case State.Start;
|
|
case State.Start:
|
|
case State.Property:
|
|
case State.Array:
|
|
case State.ArrayStart:
|
|
case State.Constructor:
|
|
case State.ConstructorStart:
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[_charPos];
|
|
|
|
switch (currentChar)
|
|
{
|
|
case '\0':
|
|
if (ReadNullChar())
|
|
{
|
|
SetToken(JsonToken.None, null, false);
|
|
return null;
|
|
}
|
|
break;
|
|
case '"':
|
|
case '\'':
|
|
ParseString(currentChar, readType);
|
|
return FinishReadQuotedStringValue(readType);
|
|
case '-':
|
|
if (EnsureChars(1, true) && _chars[_charPos + 1] == 'I')
|
|
{
|
|
return ParseNumberNegativeInfinity(readType);
|
|
}
|
|
else
|
|
{
|
|
ParseNumber(readType);
|
|
return Value;
|
|
}
|
|
case '.':
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
if (readType != ReadType.ReadAsString)
|
|
{
|
|
_charPos++;
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
}
|
|
ParseNumber(ReadType.ReadAsString);
|
|
return Value;
|
|
case 't':
|
|
case 'f':
|
|
if (readType != ReadType.ReadAsString)
|
|
{
|
|
_charPos++;
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
}
|
|
string expected = currentChar == 't' ? JsonConvert.True : JsonConvert.False;
|
|
if (!MatchValueWithTrailingSeparator(expected))
|
|
{
|
|
throw CreateUnexpectedCharacterException(_chars[_charPos]);
|
|
}
|
|
SetToken(JsonToken.String, expected);
|
|
return expected;
|
|
case 'I':
|
|
return ParseNumberPositiveInfinity(readType);
|
|
case 'N':
|
|
return ParseNumberNaN(readType);
|
|
case 'n':
|
|
HandleNull();
|
|
return null;
|
|
case '/':
|
|
ParseComment(false);
|
|
break;
|
|
case ',':
|
|
ProcessValueComma();
|
|
break;
|
|
case ']':
|
|
_charPos++;
|
|
if (_currentState == State.Array || _currentState == State.ArrayStart || _currentState == State.PostValue)
|
|
{
|
|
SetToken(JsonToken.EndArray);
|
|
return null;
|
|
}
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
case StringUtils.CarriageReturn:
|
|
ProcessCarriageReturn(false);
|
|
break;
|
|
case StringUtils.LineFeed:
|
|
ProcessLineFeed();
|
|
break;
|
|
case ' ':
|
|
case StringUtils.Tab:
|
|
// eat
|
|
_charPos++;
|
|
break;
|
|
default:
|
|
_charPos++;
|
|
|
|
if (!char.IsWhiteSpace(currentChar))
|
|
{
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
}
|
|
|
|
// eat
|
|
break;
|
|
}
|
|
}
|
|
case State.Finished:
|
|
ReadFinished();
|
|
return null;
|
|
default:
|
|
throw JsonReaderException.Create(this, "Unexpected state: {0}.".FormatWith(CultureInfo.InvariantCulture, CurrentState));
|
|
}
|
|
}
|
|
|
|
private object FinishReadQuotedStringValue(ReadType readType)
|
|
{
|
|
switch (readType)
|
|
{
|
|
case ReadType.ReadAsBytes:
|
|
case ReadType.ReadAsString:
|
|
return Value;
|
|
case ReadType.ReadAsDateTime:
|
|
if (Value is DateTime time)
|
|
{
|
|
return time;
|
|
}
|
|
|
|
return ReadDateTimeString((string)Value);
|
|
#if HAVE_DATE_TIME_OFFSET
|
|
case ReadType.ReadAsDateTimeOffset:
|
|
if (Value is DateTimeOffset offset)
|
|
{
|
|
return offset;
|
|
}
|
|
|
|
return ReadDateTimeOffsetString((string)Value);
|
|
#endif
|
|
default:
|
|
throw new ArgumentOutOfRangeException(nameof(readType));
|
|
}
|
|
}
|
|
|
|
private JsonReaderException CreateUnexpectedCharacterException(char c)
|
|
{
|
|
return JsonReaderException.Create(this, "Unexpected character encountered while parsing value: {0}.".FormatWith(CultureInfo.InvariantCulture, c));
|
|
}
|
|
|
|
/// <summary>
|
|
/// Reads the next JSON token from the underlying <see cref="TextReader"/> as a <see cref="Nullable{T}"/> of <see cref="Boolean"/>.
|
|
/// </summary>
|
|
/// <returns>A <see cref="Nullable{T}"/> of <see cref="Boolean"/>. This method will return <c>null</c> at the end of an array.</returns>
|
|
public override bool? ReadAsBoolean()
|
|
{
|
|
EnsureBuffer();
|
|
|
|
switch (_currentState)
|
|
{
|
|
case State.PostValue:
|
|
if (ParsePostValue(true))
|
|
{
|
|
return null;
|
|
}
|
|
goto case State.Start;
|
|
case State.Start:
|
|
case State.Property:
|
|
case State.Array:
|
|
case State.ArrayStart:
|
|
case State.Constructor:
|
|
case State.ConstructorStart:
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[_charPos];
|
|
|
|
switch (currentChar)
|
|
{
|
|
case '\0':
|
|
if (ReadNullChar())
|
|
{
|
|
SetToken(JsonToken.None, null, false);
|
|
return null;
|
|
}
|
|
break;
|
|
case '"':
|
|
case '\'':
|
|
ParseString(currentChar, ReadType.Read);
|
|
return ReadBooleanString(_stringReference.ToString());
|
|
case 'n':
|
|
HandleNull();
|
|
return null;
|
|
case '-':
|
|
case '.':
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
ParseNumber(ReadType.Read);
|
|
bool b;
|
|
#if HAVE_BIG_INTEGER
|
|
if (Value is BigInteger integer)
|
|
{
|
|
b = integer != 0;
|
|
}
|
|
else
|
|
#endif
|
|
{
|
|
b = Convert.ToBoolean(Value, CultureInfo.InvariantCulture);
|
|
}
|
|
SetToken(JsonToken.Boolean, b, false);
|
|
return b;
|
|
case 't':
|
|
case 'f':
|
|
bool isTrue = currentChar == 't';
|
|
string expected = isTrue ? JsonConvert.True : JsonConvert.False;
|
|
|
|
if (!MatchValueWithTrailingSeparator(expected))
|
|
{
|
|
throw CreateUnexpectedCharacterException(_chars[_charPos]);
|
|
}
|
|
SetToken(JsonToken.Boolean, isTrue);
|
|
return isTrue;
|
|
case '/':
|
|
ParseComment(false);
|
|
break;
|
|
case ',':
|
|
ProcessValueComma();
|
|
break;
|
|
case ']':
|
|
_charPos++;
|
|
if (_currentState == State.Array || _currentState == State.ArrayStart || _currentState == State.PostValue)
|
|
{
|
|
SetToken(JsonToken.EndArray);
|
|
return null;
|
|
}
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
case StringUtils.CarriageReturn:
|
|
ProcessCarriageReturn(false);
|
|
break;
|
|
case StringUtils.LineFeed:
|
|
ProcessLineFeed();
|
|
break;
|
|
case ' ':
|
|
case StringUtils.Tab:
|
|
// eat
|
|
_charPos++;
|
|
break;
|
|
default:
|
|
_charPos++;
|
|
|
|
if (!char.IsWhiteSpace(currentChar))
|
|
{
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
}
|
|
|
|
// eat
|
|
break;
|
|
}
|
|
}
|
|
case State.Finished:
|
|
ReadFinished();
|
|
return null;
|
|
default:
|
|
throw JsonReaderException.Create(this, "Unexpected state: {0}.".FormatWith(CultureInfo.InvariantCulture, CurrentState));
|
|
}
|
|
}
|
|
|
|
private void ProcessValueComma()
|
|
{
|
|
_charPos++;
|
|
|
|
if (_currentState != State.PostValue)
|
|
{
|
|
SetToken(JsonToken.Undefined);
|
|
JsonReaderException ex = CreateUnexpectedCharacterException(',');
|
|
// so the comma will be parsed again
|
|
_charPos--;
|
|
|
|
throw ex;
|
|
}
|
|
|
|
SetStateBasedOnCurrent();
|
|
}
|
|
|
|
private object ReadNumberValue(ReadType readType)
|
|
{
|
|
EnsureBuffer();
|
|
|
|
switch (_currentState)
|
|
{
|
|
case State.PostValue:
|
|
if (ParsePostValue(true))
|
|
{
|
|
return null;
|
|
}
|
|
goto case State.Start;
|
|
case State.Start:
|
|
case State.Property:
|
|
case State.Array:
|
|
case State.ArrayStart:
|
|
case State.Constructor:
|
|
case State.ConstructorStart:
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[_charPos];
|
|
|
|
switch (currentChar)
|
|
{
|
|
case '\0':
|
|
if (ReadNullChar())
|
|
{
|
|
SetToken(JsonToken.None, null, false);
|
|
return null;
|
|
}
|
|
break;
|
|
case '"':
|
|
case '\'':
|
|
ParseString(currentChar, readType);
|
|
return FinishReadQuotedNumber(readType);
|
|
case 'n':
|
|
HandleNull();
|
|
return null;
|
|
case 'N':
|
|
return ParseNumberNaN(readType);
|
|
case 'I':
|
|
return ParseNumberPositiveInfinity(readType);
|
|
case '-':
|
|
if (EnsureChars(1, true) && _chars[_charPos + 1] == 'I')
|
|
{
|
|
return ParseNumberNegativeInfinity(readType);
|
|
}
|
|
else
|
|
{
|
|
ParseNumber(readType);
|
|
return Value;
|
|
}
|
|
case '.':
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
ParseNumber(readType);
|
|
return Value;
|
|
case '/':
|
|
ParseComment(false);
|
|
break;
|
|
case ',':
|
|
ProcessValueComma();
|
|
break;
|
|
case ']':
|
|
_charPos++;
|
|
if (_currentState == State.Array || _currentState == State.ArrayStart || _currentState == State.PostValue)
|
|
{
|
|
SetToken(JsonToken.EndArray);
|
|
return null;
|
|
}
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
case StringUtils.CarriageReturn:
|
|
ProcessCarriageReturn(false);
|
|
break;
|
|
case StringUtils.LineFeed:
|
|
ProcessLineFeed();
|
|
break;
|
|
case ' ':
|
|
case StringUtils.Tab:
|
|
// eat
|
|
_charPos++;
|
|
break;
|
|
default:
|
|
_charPos++;
|
|
|
|
if (!char.IsWhiteSpace(currentChar))
|
|
{
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
}
|
|
|
|
// eat
|
|
break;
|
|
}
|
|
}
|
|
case State.Finished:
|
|
ReadFinished();
|
|
return null;
|
|
default:
|
|
throw JsonReaderException.Create(this, "Unexpected state: {0}.".FormatWith(CultureInfo.InvariantCulture, CurrentState));
|
|
}
|
|
}
|
|
|
|
private object FinishReadQuotedNumber(ReadType readType)
|
|
{
|
|
switch (readType)
|
|
{
|
|
case ReadType.ReadAsInt32:
|
|
return ReadInt32String(_stringReference.ToString());
|
|
case ReadType.ReadAsDecimal:
|
|
return ReadDecimalString(_stringReference.ToString());
|
|
case ReadType.ReadAsDouble:
|
|
return ReadDoubleString(_stringReference.ToString());
|
|
default:
|
|
throw new ArgumentOutOfRangeException(nameof(readType));
|
|
}
|
|
}
|
|
|
|
#if HAVE_DATE_TIME_OFFSET
|
|
/// <summary>
|
|
/// Reads the next JSON token from the underlying <see cref="TextReader"/> as a <see cref="Nullable{T}"/> of <see cref="DateTimeOffset"/>.
|
|
/// </summary>
|
|
/// <returns>A <see cref="Nullable{T}"/> of <see cref="DateTimeOffset"/>. This method will return <c>null</c> at the end of an array.</returns>
|
|
public override DateTimeOffset? ReadAsDateTimeOffset()
|
|
{
|
|
return (DateTimeOffset?)ReadStringValue(ReadType.ReadAsDateTimeOffset);
|
|
}
|
|
#endif
|
|
|
|
/// <summary>
|
|
/// Reads the next JSON token from the underlying <see cref="TextReader"/> as a <see cref="Nullable{T}"/> of <see cref="Decimal"/>.
|
|
/// </summary>
|
|
/// <returns>A <see cref="Nullable{T}"/> of <see cref="Decimal"/>. This method will return <c>null</c> at the end of an array.</returns>
|
|
public override decimal? ReadAsDecimal()
|
|
{
|
|
return (decimal?)ReadNumberValue(ReadType.ReadAsDecimal);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Reads the next JSON token from the underlying <see cref="TextReader"/> as a <see cref="Nullable{T}"/> of <see cref="Double"/>.
|
|
/// </summary>
|
|
/// <returns>A <see cref="Nullable{T}"/> of <see cref="Double"/>. This method will return <c>null</c> at the end of an array.</returns>
|
|
public override double? ReadAsDouble()
|
|
{
|
|
return (double?)ReadNumberValue(ReadType.ReadAsDouble);
|
|
}
|
|
|
|
private void HandleNull()
|
|
{
|
|
if (EnsureChars(1, true))
|
|
{
|
|
char next = _chars[_charPos + 1];
|
|
|
|
if (next == 'u')
|
|
{
|
|
ParseNull();
|
|
return;
|
|
}
|
|
|
|
_charPos += 2;
|
|
throw CreateUnexpectedCharacterException(_chars[_charPos - 1]);
|
|
}
|
|
|
|
_charPos = _charsUsed;
|
|
throw CreateUnexpectedEndException();
|
|
}
|
|
|
|
private void ReadFinished()
|
|
{
|
|
if (EnsureChars(0, false))
|
|
{
|
|
EatWhitespace();
|
|
if (_isEndOfFile)
|
|
{
|
|
return;
|
|
}
|
|
if (_chars[_charPos] == '/')
|
|
{
|
|
ParseComment(false);
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Additional text encountered after finished reading JSON content: {0}.".FormatWith(CultureInfo.InvariantCulture, _chars[_charPos]));
|
|
}
|
|
}
|
|
|
|
SetToken(JsonToken.None);
|
|
}
|
|
|
|
private bool ReadNullChar()
|
|
{
|
|
if (_charsUsed == _charPos)
|
|
{
|
|
if (ReadData(false) == 0)
|
|
{
|
|
_isEndOfFile = true;
|
|
return true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_charPos++;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private void EnsureBuffer()
|
|
{
|
|
if (_chars == null)
|
|
{
|
|
_chars = BufferUtils.RentBuffer(_arrayPool, 1024);
|
|
_chars[0] = '\0';
|
|
}
|
|
}
|
|
|
|
private void ReadStringIntoBuffer(char quote)
|
|
{
|
|
int charPos = _charPos;
|
|
int initialPosition = _charPos;
|
|
int lastWritePosition = _charPos;
|
|
_stringBuffer.Position = 0;
|
|
|
|
while (true)
|
|
{
|
|
switch (_chars[charPos++])
|
|
{
|
|
case '\0':
|
|
if (_charsUsed == charPos - 1)
|
|
{
|
|
charPos--;
|
|
|
|
if (ReadData(true) == 0)
|
|
{
|
|
_charPos = charPos;
|
|
throw JsonReaderException.Create(this, "Unterminated string. Expected delimiter: {0}.".FormatWith(CultureInfo.InvariantCulture, quote));
|
|
}
|
|
}
|
|
break;
|
|
case '\\':
|
|
_charPos = charPos;
|
|
if (!EnsureChars(0, true))
|
|
{
|
|
throw JsonReaderException.Create(this, "Unterminated string. Expected delimiter: {0}.".FormatWith(CultureInfo.InvariantCulture, quote));
|
|
}
|
|
|
|
// start of escape sequence
|
|
int escapeStartPos = charPos - 1;
|
|
|
|
char currentChar = _chars[charPos];
|
|
charPos++;
|
|
|
|
char writeChar;
|
|
|
|
switch (currentChar)
|
|
{
|
|
case 'b':
|
|
writeChar = '\b';
|
|
break;
|
|
case 't':
|
|
writeChar = '\t';
|
|
break;
|
|
case 'n':
|
|
writeChar = '\n';
|
|
break;
|
|
case 'f':
|
|
writeChar = '\f';
|
|
break;
|
|
case 'r':
|
|
writeChar = '\r';
|
|
break;
|
|
case '\\':
|
|
writeChar = '\\';
|
|
break;
|
|
case '"':
|
|
case '\'':
|
|
case '/':
|
|
writeChar = currentChar;
|
|
break;
|
|
case 'u':
|
|
_charPos = charPos;
|
|
writeChar = ParseUnicode();
|
|
|
|
if (StringUtils.IsLowSurrogate(writeChar))
|
|
{
|
|
// low surrogate with no preceding high surrogate; this char is replaced
|
|
writeChar = UnicodeReplacementChar;
|
|
}
|
|
else if (StringUtils.IsHighSurrogate(writeChar))
|
|
{
|
|
bool anotherHighSurrogate;
|
|
|
|
// loop for handling situations where there are multiple consecutive high surrogates
|
|
do
|
|
{
|
|
anotherHighSurrogate = false;
|
|
|
|
// potential start of a surrogate pair
|
|
if (EnsureChars(2, true) && _chars[_charPos] == '\\' && _chars[_charPos + 1] == 'u')
|
|
{
|
|
char highSurrogate = writeChar;
|
|
|
|
_charPos += 2;
|
|
writeChar = ParseUnicode();
|
|
|
|
if (StringUtils.IsLowSurrogate(writeChar))
|
|
{
|
|
// a valid surrogate pair!
|
|
}
|
|
else if (StringUtils.IsHighSurrogate(writeChar))
|
|
{
|
|
// another high surrogate; replace current and start check over
|
|
highSurrogate = UnicodeReplacementChar;
|
|
anotherHighSurrogate = true;
|
|
}
|
|
else
|
|
{
|
|
// high surrogate not followed by low surrogate; original char is replaced
|
|
highSurrogate = UnicodeReplacementChar;
|
|
}
|
|
|
|
EnsureBufferNotEmpty();
|
|
|
|
WriteCharToBuffer(highSurrogate, lastWritePosition, escapeStartPos);
|
|
lastWritePosition = _charPos;
|
|
}
|
|
else
|
|
{
|
|
// there are not enough remaining chars for the low surrogate or is not follow by unicode sequence
|
|
// replace high surrogate and continue on as usual
|
|
writeChar = UnicodeReplacementChar;
|
|
}
|
|
} while (anotherHighSurrogate);
|
|
}
|
|
|
|
charPos = _charPos;
|
|
break;
|
|
default:
|
|
_charPos = charPos;
|
|
throw JsonReaderException.Create(this, "Bad JSON escape sequence: {0}.".FormatWith(CultureInfo.InvariantCulture, @"\" + currentChar));
|
|
}
|
|
|
|
EnsureBufferNotEmpty();
|
|
WriteCharToBuffer(writeChar, lastWritePosition, escapeStartPos);
|
|
|
|
lastWritePosition = charPos;
|
|
break;
|
|
case StringUtils.CarriageReturn:
|
|
_charPos = charPos - 1;
|
|
ProcessCarriageReturn(true);
|
|
charPos = _charPos;
|
|
break;
|
|
case StringUtils.LineFeed:
|
|
_charPos = charPos - 1;
|
|
ProcessLineFeed();
|
|
charPos = _charPos;
|
|
break;
|
|
case '"':
|
|
case '\'':
|
|
if (_chars[charPos - 1] == quote)
|
|
{
|
|
FinishReadStringIntoBuffer(charPos - 1, initialPosition, lastWritePosition);
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void FinishReadStringIntoBuffer(int charPos, int initialPosition, int lastWritePosition)
|
|
{
|
|
if (initialPosition == lastWritePosition)
|
|
{
|
|
_stringReference = new StringReference(_chars, initialPosition, charPos - initialPosition);
|
|
}
|
|
else
|
|
{
|
|
EnsureBufferNotEmpty();
|
|
|
|
if (charPos > lastWritePosition)
|
|
{
|
|
_stringBuffer.Append(_arrayPool, _chars, lastWritePosition, charPos - lastWritePosition);
|
|
}
|
|
|
|
_stringReference = new StringReference(_stringBuffer.InternalBuffer, 0, _stringBuffer.Position);
|
|
}
|
|
|
|
_charPos = charPos + 1;
|
|
}
|
|
|
|
private void WriteCharToBuffer(char writeChar, int lastWritePosition, int writeToPosition)
|
|
{
|
|
if (writeToPosition > lastWritePosition)
|
|
{
|
|
_stringBuffer.Append(_arrayPool, _chars, lastWritePosition, writeToPosition - lastWritePosition);
|
|
}
|
|
|
|
_stringBuffer.Append(_arrayPool, writeChar);
|
|
}
|
|
|
|
private char ConvertUnicode(bool enoughChars)
|
|
{
|
|
if (enoughChars)
|
|
{
|
|
if (ConvertUtils.TryHexTextToInt(_chars, _charPos, _charPos + 4, out int value))
|
|
{
|
|
char hexChar = Convert.ToChar(value);
|
|
_charPos += 4;
|
|
return hexChar;
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, @"Invalid Unicode escape sequence: \u{0}.".FormatWith(CultureInfo.InvariantCulture, new string(_chars, _charPos, 4)));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Unexpected end while parsing Unicode escape sequence.");
|
|
}
|
|
}
|
|
|
|
private char ParseUnicode()
|
|
{
|
|
return ConvertUnicode(EnsureChars(4, true));
|
|
}
|
|
|
|
private void ReadNumberIntoBuffer()
|
|
{
|
|
int charPos = _charPos;
|
|
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[charPos];
|
|
if (currentChar == '\0')
|
|
{
|
|
_charPos = charPos;
|
|
|
|
if (_charsUsed == charPos)
|
|
{
|
|
if (ReadData(true) == 0)
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
else if (ReadNumberCharIntoBuffer(currentChar, charPos))
|
|
{
|
|
return;
|
|
}
|
|
else
|
|
{
|
|
charPos++;
|
|
}
|
|
}
|
|
}
|
|
|
|
private bool ReadNumberCharIntoBuffer(char currentChar, int charPos)
|
|
{
|
|
switch (currentChar)
|
|
{
|
|
case '-':
|
|
case '+':
|
|
case 'a':
|
|
case 'A':
|
|
case 'b':
|
|
case 'B':
|
|
case 'c':
|
|
case 'C':
|
|
case 'd':
|
|
case 'D':
|
|
case 'e':
|
|
case 'E':
|
|
case 'f':
|
|
case 'F':
|
|
case 'x':
|
|
case 'X':
|
|
case '.':
|
|
case '0':
|
|
case '1':
|
|
case '2':
|
|
case '3':
|
|
case '4':
|
|
case '5':
|
|
case '6':
|
|
case '7':
|
|
case '8':
|
|
case '9':
|
|
return false;
|
|
default:
|
|
_charPos = charPos;
|
|
|
|
if (char.IsWhiteSpace(currentChar) || currentChar == ',' || currentChar == '}' || currentChar == ']' || currentChar == ')' || currentChar == '/')
|
|
{
|
|
return true;
|
|
}
|
|
|
|
throw JsonReaderException.Create(this, "Unexpected character encountered while parsing number: {0}.".FormatWith(CultureInfo.InvariantCulture, currentChar));
|
|
}
|
|
}
|
|
|
|
private void ClearRecentString()
|
|
{
|
|
_stringBuffer.Position = 0;
|
|
_stringReference = new StringReference();
|
|
}
|
|
|
|
private bool ParsePostValue(bool ignoreComments)
|
|
{
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[_charPos];
|
|
|
|
switch (currentChar)
|
|
{
|
|
case '\0':
|
|
if (_charsUsed == _charPos)
|
|
{
|
|
if (ReadData(false) == 0)
|
|
{
|
|
_currentState = State.Finished;
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_charPos++;
|
|
}
|
|
break;
|
|
case '}':
|
|
_charPos++;
|
|
SetToken(JsonToken.EndObject);
|
|
return true;
|
|
case ']':
|
|
_charPos++;
|
|
SetToken(JsonToken.EndArray);
|
|
return true;
|
|
case ')':
|
|
_charPos++;
|
|
SetToken(JsonToken.EndConstructor);
|
|
return true;
|
|
case '/':
|
|
ParseComment(!ignoreComments);
|
|
if (!ignoreComments)
|
|
{
|
|
return true;
|
|
}
|
|
break;
|
|
case ',':
|
|
_charPos++;
|
|
|
|
// finished parsing
|
|
SetStateBasedOnCurrent();
|
|
return false;
|
|
case ' ':
|
|
case StringUtils.Tab:
|
|
// eat
|
|
_charPos++;
|
|
break;
|
|
case StringUtils.CarriageReturn:
|
|
ProcessCarriageReturn(false);
|
|
break;
|
|
case StringUtils.LineFeed:
|
|
ProcessLineFeed();
|
|
break;
|
|
default:
|
|
if (char.IsWhiteSpace(currentChar))
|
|
{
|
|
// eat
|
|
_charPos++;
|
|
}
|
|
else
|
|
{
|
|
// handle multiple content without comma delimiter
|
|
if (SupportMultipleContent && Depth == 0)
|
|
{
|
|
SetStateBasedOnCurrent();
|
|
return false;
|
|
}
|
|
|
|
throw JsonReaderException.Create(this, "After parsing a value an unexpected character was encountered: {0}.".FormatWith(CultureInfo.InvariantCulture, currentChar));
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
private bool ParseObject()
|
|
{
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[_charPos];
|
|
|
|
switch (currentChar)
|
|
{
|
|
case '\0':
|
|
if (_charsUsed == _charPos)
|
|
{
|
|
if (ReadData(false) == 0)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_charPos++;
|
|
}
|
|
break;
|
|
case '}':
|
|
SetToken(JsonToken.EndObject);
|
|
_charPos++;
|
|
return true;
|
|
case '/':
|
|
ParseComment(true);
|
|
return true;
|
|
case StringUtils.CarriageReturn:
|
|
ProcessCarriageReturn(false);
|
|
break;
|
|
case StringUtils.LineFeed:
|
|
ProcessLineFeed();
|
|
break;
|
|
case ' ':
|
|
case StringUtils.Tab:
|
|
// eat
|
|
_charPos++;
|
|
break;
|
|
default:
|
|
if (char.IsWhiteSpace(currentChar))
|
|
{
|
|
// eat
|
|
_charPos++;
|
|
}
|
|
else
|
|
{
|
|
return ParseProperty();
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
private bool ParseProperty()
|
|
{
|
|
char firstChar = _chars[_charPos];
|
|
char quoteChar;
|
|
|
|
if (firstChar == '"' || firstChar == '\'')
|
|
{
|
|
_charPos++;
|
|
quoteChar = firstChar;
|
|
ShiftBufferIfNeeded();
|
|
ReadStringIntoBuffer(quoteChar);
|
|
}
|
|
else if (ValidIdentifierChar(firstChar))
|
|
{
|
|
quoteChar = '\0';
|
|
ShiftBufferIfNeeded();
|
|
ParseUnquotedProperty();
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Invalid property identifier character: {0}.".FormatWith(CultureInfo.InvariantCulture, _chars[_charPos]));
|
|
}
|
|
|
|
string propertyName;
|
|
|
|
if (PropertyNameTable != null)
|
|
{
|
|
propertyName = PropertyNameTable.Get(_stringReference.Chars, _stringReference.StartIndex, _stringReference.Length);
|
|
|
|
// no match in name table
|
|
if (propertyName == null)
|
|
{
|
|
propertyName = _stringReference.ToString();
|
|
}
|
|
}
|
|
else
|
|
{
|
|
propertyName = _stringReference.ToString();
|
|
}
|
|
|
|
EatWhitespace();
|
|
|
|
if (_chars[_charPos] != ':')
|
|
{
|
|
throw JsonReaderException.Create(this, "Invalid character after parsing property name. Expected ':' but got: {0}.".FormatWith(CultureInfo.InvariantCulture, _chars[_charPos]));
|
|
}
|
|
|
|
_charPos++;
|
|
|
|
SetToken(JsonToken.PropertyName, propertyName);
|
|
_quoteChar = quoteChar;
|
|
ClearRecentString();
|
|
|
|
return true;
|
|
}
|
|
|
|
private bool ValidIdentifierChar(char value)
|
|
{
|
|
return (char.IsLetterOrDigit(value) || value == '_' || value == '$');
|
|
}
|
|
|
|
private void ParseUnquotedProperty()
|
|
{
|
|
int initialPosition = _charPos;
|
|
|
|
// parse unquoted property name until whitespace or colon
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[_charPos];
|
|
if (currentChar == '\0')
|
|
{
|
|
if (_charsUsed == _charPos)
|
|
{
|
|
if (ReadData(true) == 0)
|
|
{
|
|
throw JsonReaderException.Create(this, "Unexpected end while parsing unquoted property name.");
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
_stringReference = new StringReference(_chars, initialPosition, _charPos - initialPosition);
|
|
return;
|
|
}
|
|
|
|
if (ReadUnquotedPropertyReportIfDone(currentChar, initialPosition))
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
|
|
private bool ReadUnquotedPropertyReportIfDone(char currentChar, int initialPosition)
|
|
{
|
|
if (ValidIdentifierChar(currentChar))
|
|
{
|
|
_charPos++;
|
|
return false;
|
|
}
|
|
|
|
if (char.IsWhiteSpace(currentChar) || currentChar == ':')
|
|
{
|
|
_stringReference = new StringReference(_chars, initialPosition, _charPos - initialPosition);
|
|
return true;
|
|
}
|
|
|
|
throw JsonReaderException.Create(this, "Invalid JavaScript property identifier character: {0}.".FormatWith(CultureInfo.InvariantCulture, currentChar));
|
|
}
|
|
|
|
private bool ParseValue()
|
|
{
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[_charPos];
|
|
|
|
switch (currentChar)
|
|
{
|
|
case '\0':
|
|
if (_charsUsed == _charPos)
|
|
{
|
|
if (ReadData(false) == 0)
|
|
{
|
|
return false;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_charPos++;
|
|
}
|
|
break;
|
|
case '"':
|
|
case '\'':
|
|
ParseString(currentChar, ReadType.Read);
|
|
return true;
|
|
case 't':
|
|
ParseTrue();
|
|
return true;
|
|
case 'f':
|
|
ParseFalse();
|
|
return true;
|
|
case 'n':
|
|
if (EnsureChars(1, true))
|
|
{
|
|
char next = _chars[_charPos + 1];
|
|
|
|
if (next == 'u')
|
|
{
|
|
ParseNull();
|
|
}
|
|
else if (next == 'e')
|
|
{
|
|
ParseConstructor();
|
|
}
|
|
else
|
|
{
|
|
throw CreateUnexpectedCharacterException(_chars[_charPos]);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_charPos++;
|
|
throw CreateUnexpectedEndException();
|
|
}
|
|
return true;
|
|
case 'N':
|
|
ParseNumberNaN(ReadType.Read);
|
|
return true;
|
|
case 'I':
|
|
ParseNumberPositiveInfinity(ReadType.Read);
|
|
return true;
|
|
case '-':
|
|
if (EnsureChars(1, true) && _chars[_charPos + 1] == 'I')
|
|
{
|
|
ParseNumberNegativeInfinity(ReadType.Read);
|
|
}
|
|
else
|
|
{
|
|
ParseNumber(ReadType.Read);
|
|
}
|
|
return true;
|
|
case '/':
|
|
ParseComment(true);
|
|
return true;
|
|
case 'u':
|
|
ParseUndefined();
|
|
return true;
|
|
case '{':
|
|
_charPos++;
|
|
SetToken(JsonToken.StartObject);
|
|
return true;
|
|
case '[':
|
|
_charPos++;
|
|
SetToken(JsonToken.StartArray);
|
|
return true;
|
|
case ']':
|
|
_charPos++;
|
|
SetToken(JsonToken.EndArray);
|
|
return true;
|
|
case ',':
|
|
// don't increment position, the next call to read will handle comma
|
|
// this is done to handle multiple empty comma values
|
|
SetToken(JsonToken.Undefined);
|
|
return true;
|
|
case ')':
|
|
_charPos++;
|
|
SetToken(JsonToken.EndConstructor);
|
|
return true;
|
|
case StringUtils.CarriageReturn:
|
|
ProcessCarriageReturn(false);
|
|
break;
|
|
case StringUtils.LineFeed:
|
|
ProcessLineFeed();
|
|
break;
|
|
case ' ':
|
|
case StringUtils.Tab:
|
|
// eat
|
|
_charPos++;
|
|
break;
|
|
default:
|
|
if (char.IsWhiteSpace(currentChar))
|
|
{
|
|
// eat
|
|
_charPos++;
|
|
break;
|
|
}
|
|
if (char.IsNumber(currentChar) || currentChar == '-' || currentChar == '.')
|
|
{
|
|
ParseNumber(ReadType.Read);
|
|
return true;
|
|
}
|
|
|
|
throw CreateUnexpectedCharacterException(currentChar);
|
|
}
|
|
}
|
|
}
|
|
|
|
private void ProcessLineFeed()
|
|
{
|
|
_charPos++;
|
|
OnNewLine(_charPos);
|
|
}
|
|
|
|
private void ProcessCarriageReturn(bool append)
|
|
{
|
|
_charPos++;
|
|
|
|
SetNewLine(EnsureChars(1, append));
|
|
}
|
|
|
|
private void EatWhitespace()
|
|
{
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[_charPos];
|
|
|
|
switch (currentChar)
|
|
{
|
|
case '\0':
|
|
if (_charsUsed == _charPos)
|
|
{
|
|
if (ReadData(false) == 0)
|
|
{
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_charPos++;
|
|
}
|
|
break;
|
|
case StringUtils.CarriageReturn:
|
|
ProcessCarriageReturn(false);
|
|
break;
|
|
case StringUtils.LineFeed:
|
|
ProcessLineFeed();
|
|
break;
|
|
default:
|
|
if (currentChar == ' ' || char.IsWhiteSpace(currentChar))
|
|
{
|
|
_charPos++;
|
|
}
|
|
else
|
|
{
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void ParseConstructor()
|
|
{
|
|
if (MatchValueWithTrailingSeparator("new"))
|
|
{
|
|
EatWhitespace();
|
|
|
|
int initialPosition = _charPos;
|
|
int endPosition;
|
|
|
|
while (true)
|
|
{
|
|
char currentChar = _chars[_charPos];
|
|
if (currentChar == '\0')
|
|
{
|
|
if (_charsUsed == _charPos)
|
|
{
|
|
if (ReadData(true) == 0)
|
|
{
|
|
throw JsonReaderException.Create(this, "Unexpected end while parsing constructor.");
|
|
}
|
|
}
|
|
else
|
|
{
|
|
endPosition = _charPos;
|
|
_charPos++;
|
|
break;
|
|
}
|
|
}
|
|
else if (char.IsLetterOrDigit(currentChar))
|
|
{
|
|
_charPos++;
|
|
}
|
|
else if (currentChar == StringUtils.CarriageReturn)
|
|
{
|
|
endPosition = _charPos;
|
|
ProcessCarriageReturn(true);
|
|
break;
|
|
}
|
|
else if (currentChar == StringUtils.LineFeed)
|
|
{
|
|
endPosition = _charPos;
|
|
ProcessLineFeed();
|
|
break;
|
|
}
|
|
else if (char.IsWhiteSpace(currentChar))
|
|
{
|
|
endPosition = _charPos;
|
|
_charPos++;
|
|
break;
|
|
}
|
|
else if (currentChar == '(')
|
|
{
|
|
endPosition = _charPos;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Unexpected character while parsing constructor: {0}.".FormatWith(CultureInfo.InvariantCulture, currentChar));
|
|
}
|
|
}
|
|
|
|
_stringReference = new StringReference(_chars, initialPosition, endPosition - initialPosition);
|
|
string constructorName = _stringReference.ToString();
|
|
|
|
EatWhitespace();
|
|
|
|
if (_chars[_charPos] != '(')
|
|
{
|
|
throw JsonReaderException.Create(this, "Unexpected character while parsing constructor: {0}.".FormatWith(CultureInfo.InvariantCulture, _chars[_charPos]));
|
|
}
|
|
|
|
_charPos++;
|
|
|
|
ClearRecentString();
|
|
|
|
SetToken(JsonToken.StartConstructor, constructorName);
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Unexpected content while parsing JSON.");
|
|
}
|
|
}
|
|
|
|
private void ParseNumber(ReadType readType)
|
|
{
|
|
ShiftBufferIfNeeded();
|
|
|
|
char firstChar = _chars[_charPos];
|
|
int initialPosition = _charPos;
|
|
|
|
ReadNumberIntoBuffer();
|
|
|
|
ParseReadNumber(readType, firstChar, initialPosition);
|
|
}
|
|
|
|
private void ParseReadNumber(ReadType readType, char firstChar, int initialPosition)
|
|
{
|
|
// set state to PostValue now so that if there is an error parsing the number then the reader can continue
|
|
SetPostValueState(true);
|
|
|
|
_stringReference = new StringReference(_chars, initialPosition, _charPos - initialPosition);
|
|
|
|
object numberValue;
|
|
JsonToken numberType;
|
|
|
|
bool singleDigit = (char.IsDigit(firstChar) && _stringReference.Length == 1);
|
|
bool nonBase10 = (firstChar == '0' && _stringReference.Length > 1 && _stringReference.Chars[_stringReference.StartIndex + 1] != '.' && _stringReference.Chars[_stringReference.StartIndex + 1] != 'e' && _stringReference.Chars[_stringReference.StartIndex + 1] != 'E');
|
|
|
|
switch (readType)
|
|
{
|
|
case ReadType.ReadAsString:
|
|
{
|
|
string number = _stringReference.ToString();
|
|
|
|
// validate that the string is a valid number
|
|
if (nonBase10)
|
|
{
|
|
try
|
|
{
|
|
if (number.StartsWith("0x", StringComparison.OrdinalIgnoreCase))
|
|
{
|
|
Convert.ToInt64(number, 16);
|
|
}
|
|
else
|
|
{
|
|
Convert.ToInt64(number, 8);
|
|
}
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid number.".FormatWith(CultureInfo.InvariantCulture, number), ex);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
if (!double.TryParse(number, NumberStyles.Float, CultureInfo.InvariantCulture, out _))
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid number.".FormatWith(CultureInfo.InvariantCulture, _stringReference.ToString()));
|
|
}
|
|
}
|
|
|
|
numberType = JsonToken.String;
|
|
numberValue = number;
|
|
}
|
|
break;
|
|
case ReadType.ReadAsInt32:
|
|
{
|
|
if (singleDigit)
|
|
{
|
|
// digit char values start at 48
|
|
numberValue = firstChar - 48;
|
|
}
|
|
else if (nonBase10)
|
|
{
|
|
string number = _stringReference.ToString();
|
|
|
|
try
|
|
{
|
|
int integer = number.StartsWith("0x", StringComparison.OrdinalIgnoreCase) ? Convert.ToInt32(number, 16) : Convert.ToInt32(number, 8);
|
|
|
|
numberValue = integer;
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid integer.".FormatWith(CultureInfo.InvariantCulture, number), ex);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ParseResult parseResult = ConvertUtils.Int32TryParse(_stringReference.Chars, _stringReference.StartIndex, _stringReference.Length, out int value);
|
|
if (parseResult == ParseResult.Success)
|
|
{
|
|
numberValue = value;
|
|
}
|
|
else if (parseResult == ParseResult.Overflow)
|
|
{
|
|
throw ThrowReaderError("JSON integer {0} is too large or small for an Int32.".FormatWith(CultureInfo.InvariantCulture, _stringReference.ToString()));
|
|
}
|
|
else
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid integer.".FormatWith(CultureInfo.InvariantCulture, _stringReference.ToString()));
|
|
}
|
|
}
|
|
|
|
numberType = JsonToken.Integer;
|
|
}
|
|
break;
|
|
case ReadType.ReadAsDecimal:
|
|
{
|
|
if (singleDigit)
|
|
{
|
|
// digit char values start at 48
|
|
numberValue = (decimal)firstChar - 48;
|
|
}
|
|
else if (nonBase10)
|
|
{
|
|
string number = _stringReference.ToString();
|
|
|
|
try
|
|
{
|
|
// decimal.Parse doesn't support parsing hexadecimal values
|
|
long integer = number.StartsWith("0x", StringComparison.OrdinalIgnoreCase) ? Convert.ToInt64(number, 16) : Convert.ToInt64(number, 8);
|
|
|
|
numberValue = Convert.ToDecimal(integer);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid decimal.".FormatWith(CultureInfo.InvariantCulture, number), ex);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ParseResult parseResult = ConvertUtils.DecimalTryParse(_stringReference.Chars, _stringReference.StartIndex, _stringReference.Length, out decimal value);
|
|
if (parseResult == ParseResult.Success)
|
|
{
|
|
numberValue = value;
|
|
}
|
|
else
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid decimal.".FormatWith(CultureInfo.InvariantCulture, _stringReference.ToString()));
|
|
}
|
|
}
|
|
|
|
numberType = JsonToken.Float;
|
|
}
|
|
break;
|
|
case ReadType.ReadAsDouble:
|
|
{
|
|
if (singleDigit)
|
|
{
|
|
// digit char values start at 48
|
|
numberValue = (double)firstChar - 48;
|
|
}
|
|
else if (nonBase10)
|
|
{
|
|
string number = _stringReference.ToString();
|
|
|
|
try
|
|
{
|
|
// double.Parse doesn't support parsing hexadecimal values
|
|
long integer = number.StartsWith("0x", StringComparison.OrdinalIgnoreCase) ? Convert.ToInt64(number, 16) : Convert.ToInt64(number, 8);
|
|
|
|
numberValue = Convert.ToDouble(integer);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid double.".FormatWith(CultureInfo.InvariantCulture, number), ex);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
string number = _stringReference.ToString();
|
|
|
|
if (double.TryParse(number, NumberStyles.Float, CultureInfo.InvariantCulture, out double value))
|
|
{
|
|
numberValue = value;
|
|
}
|
|
else
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid double.".FormatWith(CultureInfo.InvariantCulture, _stringReference.ToString()));
|
|
}
|
|
}
|
|
|
|
numberType = JsonToken.Float;
|
|
}
|
|
break;
|
|
case ReadType.Read:
|
|
case ReadType.ReadAsInt64:
|
|
{
|
|
if (singleDigit)
|
|
{
|
|
// digit char values start at 48
|
|
numberValue = (long)firstChar - 48;
|
|
numberType = JsonToken.Integer;
|
|
}
|
|
else if (nonBase10)
|
|
{
|
|
string number = _stringReference.ToString();
|
|
|
|
try
|
|
{
|
|
numberValue = number.StartsWith("0x", StringComparison.OrdinalIgnoreCase) ? Convert.ToInt64(number, 16) : Convert.ToInt64(number, 8);
|
|
}
|
|
catch (Exception ex)
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid number.".FormatWith(CultureInfo.InvariantCulture, number), ex);
|
|
}
|
|
|
|
numberType = JsonToken.Integer;
|
|
}
|
|
else
|
|
{
|
|
ParseResult parseResult = ConvertUtils.Int64TryParse(_stringReference.Chars, _stringReference.StartIndex, _stringReference.Length, out long value);
|
|
if (parseResult == ParseResult.Success)
|
|
{
|
|
numberValue = value;
|
|
numberType = JsonToken.Integer;
|
|
}
|
|
else if (parseResult == ParseResult.Overflow)
|
|
{
|
|
#if HAVE_BIG_INTEGER
|
|
string number = _stringReference.ToString();
|
|
|
|
if (number.Length > MaximumJavascriptIntegerCharacterLength)
|
|
{
|
|
throw ThrowReaderError("JSON integer {0} is too large to parse.".FormatWith(CultureInfo.InvariantCulture, _stringReference.ToString()));
|
|
}
|
|
|
|
numberValue = BigIntegerParse(number, CultureInfo.InvariantCulture);
|
|
numberType = JsonToken.Integer;
|
|
#else
|
|
throw ThrowReaderError("JSON integer {0} is too large or small for an Int64.".FormatWith(CultureInfo.InvariantCulture, _stringReference.ToString()));
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
if (_floatParseHandling == FloatParseHandling.Decimal)
|
|
{
|
|
parseResult = ConvertUtils.DecimalTryParse(_stringReference.Chars, _stringReference.StartIndex, _stringReference.Length, out decimal d);
|
|
if (parseResult == ParseResult.Success)
|
|
{
|
|
numberValue = d;
|
|
}
|
|
else
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid decimal.".FormatWith(CultureInfo.InvariantCulture, _stringReference.ToString()));
|
|
}
|
|
}
|
|
else
|
|
{
|
|
string number = _stringReference.ToString();
|
|
|
|
if (double.TryParse(number, NumberStyles.Float, CultureInfo.InvariantCulture, out double d))
|
|
{
|
|
numberValue = d;
|
|
}
|
|
else
|
|
{
|
|
throw ThrowReaderError("Input string '{0}' is not a valid number.".FormatWith(CultureInfo.InvariantCulture, _stringReference.ToString()));
|
|
}
|
|
}
|
|
|
|
numberType = JsonToken.Float;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
default:
|
|
throw JsonReaderException.Create(this, "Cannot read number value as type.");
|
|
}
|
|
|
|
ClearRecentString();
|
|
|
|
// index has already been updated
|
|
SetToken(numberType, numberValue, false);
|
|
}
|
|
|
|
private JsonReaderException ThrowReaderError(string message, Exception ex = null)
|
|
{
|
|
SetToken(JsonToken.Undefined, null, false);
|
|
return JsonReaderException.Create(this, message, ex);
|
|
}
|
|
|
|
#if HAVE_BIG_INTEGER
|
|
// By using the BigInteger type in a separate method,
|
|
// the runtime can execute the ParseNumber even if
|
|
// the System.Numerics.BigInteger.Parse method is
|
|
// missing, which happens in some versions of Mono
|
|
[MethodImpl(MethodImplOptions.NoInlining)]
|
|
private static object BigIntegerParse(string number, CultureInfo culture)
|
|
{
|
|
return System.Numerics.BigInteger.Parse(number, culture);
|
|
}
|
|
#endif
|
|
|
|
private void ParseComment(bool setToken)
|
|
{
|
|
// should have already parsed / character before reaching this method
|
|
_charPos++;
|
|
|
|
if (!EnsureChars(1, false))
|
|
{
|
|
throw JsonReaderException.Create(this, "Unexpected end while parsing comment.");
|
|
}
|
|
|
|
bool singlelineComment;
|
|
|
|
if (_chars[_charPos] == '*')
|
|
{
|
|
singlelineComment = false;
|
|
}
|
|
else if (_chars[_charPos] == '/')
|
|
{
|
|
singlelineComment = true;
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Error parsing comment. Expected: *, got {0}.".FormatWith(CultureInfo.InvariantCulture, _chars[_charPos]));
|
|
}
|
|
|
|
_charPos++;
|
|
|
|
int initialPosition = _charPos;
|
|
|
|
while (true)
|
|
{
|
|
switch (_chars[_charPos])
|
|
{
|
|
case '\0':
|
|
if (_charsUsed == _charPos)
|
|
{
|
|
if (ReadData(true) == 0)
|
|
{
|
|
if (!singlelineComment)
|
|
{
|
|
throw JsonReaderException.Create(this, "Unexpected end while parsing comment.");
|
|
}
|
|
|
|
EndComment(setToken, initialPosition, _charPos);
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
_charPos++;
|
|
}
|
|
break;
|
|
case '*':
|
|
_charPos++;
|
|
|
|
if (!singlelineComment)
|
|
{
|
|
if (EnsureChars(0, true))
|
|
{
|
|
if (_chars[_charPos] == '/')
|
|
{
|
|
EndComment(setToken, initialPosition, _charPos - 1);
|
|
|
|
_charPos++;
|
|
return;
|
|
}
|
|
}
|
|
}
|
|
break;
|
|
case StringUtils.CarriageReturn:
|
|
if (singlelineComment)
|
|
{
|
|
EndComment(setToken, initialPosition, _charPos);
|
|
return;
|
|
}
|
|
ProcessCarriageReturn(true);
|
|
break;
|
|
case StringUtils.LineFeed:
|
|
if (singlelineComment)
|
|
{
|
|
EndComment(setToken, initialPosition, _charPos);
|
|
return;
|
|
}
|
|
ProcessLineFeed();
|
|
break;
|
|
default:
|
|
_charPos++;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
private void EndComment(bool setToken, int initialPosition, int endPosition)
|
|
{
|
|
if (setToken)
|
|
{
|
|
SetToken(JsonToken.Comment, new string(_chars, initialPosition, endPosition - initialPosition));
|
|
}
|
|
}
|
|
|
|
private bool MatchValue(string value)
|
|
{
|
|
return MatchValue(EnsureChars(value.Length - 1, true), value);
|
|
}
|
|
|
|
private bool MatchValue(bool enoughChars, string value)
|
|
{
|
|
if (!enoughChars)
|
|
{
|
|
_charPos = _charsUsed;
|
|
throw CreateUnexpectedEndException();
|
|
}
|
|
|
|
for (int i = 0; i < value.Length; i++)
|
|
{
|
|
if (_chars[_charPos + i] != value[i])
|
|
{
|
|
_charPos += i;
|
|
return false;
|
|
}
|
|
}
|
|
|
|
_charPos += value.Length;
|
|
|
|
return true;
|
|
}
|
|
|
|
private bool MatchValueWithTrailingSeparator(string value)
|
|
{
|
|
// will match value and then move to the next character, checking that it is a separator character
|
|
bool match = MatchValue(value);
|
|
|
|
if (!match)
|
|
{
|
|
return false;
|
|
}
|
|
|
|
if (!EnsureChars(0, false))
|
|
{
|
|
return true;
|
|
}
|
|
|
|
return IsSeparator(_chars[_charPos]) || _chars[_charPos] == '\0';
|
|
}
|
|
|
|
private bool IsSeparator(char c)
|
|
{
|
|
switch (c)
|
|
{
|
|
case '}':
|
|
case ']':
|
|
case ',':
|
|
return true;
|
|
case '/':
|
|
// check next character to see if start of a comment
|
|
if (!EnsureChars(1, false))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
char nextChart = _chars[_charPos + 1];
|
|
|
|
return (nextChart == '*' || nextChart == '/');
|
|
case ')':
|
|
if (CurrentState == State.Constructor || CurrentState == State.ConstructorStart)
|
|
{
|
|
return true;
|
|
}
|
|
break;
|
|
case ' ':
|
|
case StringUtils.Tab:
|
|
case StringUtils.LineFeed:
|
|
case StringUtils.CarriageReturn:
|
|
return true;
|
|
default:
|
|
if (char.IsWhiteSpace(c))
|
|
{
|
|
return true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
private void ParseTrue()
|
|
{
|
|
// check characters equal 'true'
|
|
// and that it is followed by either a separator character
|
|
// or the text ends
|
|
if (MatchValueWithTrailingSeparator(JsonConvert.True))
|
|
{
|
|
SetToken(JsonToken.Boolean, true);
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Error parsing boolean value.");
|
|
}
|
|
}
|
|
|
|
private void ParseNull()
|
|
{
|
|
if (MatchValueWithTrailingSeparator(JsonConvert.Null))
|
|
{
|
|
SetToken(JsonToken.Null);
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Error parsing null value.");
|
|
}
|
|
}
|
|
|
|
private void ParseUndefined()
|
|
{
|
|
if (MatchValueWithTrailingSeparator(JsonConvert.Undefined))
|
|
{
|
|
SetToken(JsonToken.Undefined);
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Error parsing undefined value.");
|
|
}
|
|
}
|
|
|
|
private void ParseFalse()
|
|
{
|
|
if (MatchValueWithTrailingSeparator(JsonConvert.False))
|
|
{
|
|
SetToken(JsonToken.Boolean, false);
|
|
}
|
|
else
|
|
{
|
|
throw JsonReaderException.Create(this, "Error parsing boolean value.");
|
|
}
|
|
}
|
|
|
|
private object ParseNumberNegativeInfinity(ReadType readType)
|
|
{
|
|
return ParseNumberNegativeInfinity(readType, MatchValueWithTrailingSeparator(JsonConvert.NegativeInfinity));
|
|
}
|
|
|
|
private object ParseNumberNegativeInfinity(ReadType readType, bool matched)
|
|
{
|
|
if (matched)
|
|
{
|
|
switch (readType)
|
|
{
|
|
case ReadType.Read:
|
|
case ReadType.ReadAsDouble:
|
|
if (_floatParseHandling == FloatParseHandling.Double)
|
|
{
|
|
SetToken(JsonToken.Float, double.NegativeInfinity);
|
|
return double.NegativeInfinity;
|
|
}
|
|
break;
|
|
case ReadType.ReadAsString:
|
|
SetToken(JsonToken.String, JsonConvert.NegativeInfinity);
|
|
return JsonConvert.NegativeInfinity;
|
|
}
|
|
|
|
throw JsonReaderException.Create(this, "Cannot read -Infinity value.");
|
|
}
|
|
|
|
throw JsonReaderException.Create(this, "Error parsing -Infinity value.");
|
|
}
|
|
|
|
private object ParseNumberPositiveInfinity(ReadType readType)
|
|
{
|
|
return ParseNumberPositiveInfinity(readType, MatchValueWithTrailingSeparator(JsonConvert.PositiveInfinity));
|
|
}
|
|
private object ParseNumberPositiveInfinity(ReadType readType, bool matched)
|
|
{
|
|
if (matched)
|
|
{
|
|
switch (readType)
|
|
{
|
|
case ReadType.Read:
|
|
case ReadType.ReadAsDouble:
|
|
if (_floatParseHandling == FloatParseHandling.Double)
|
|
{
|
|
SetToken(JsonToken.Float, double.PositiveInfinity);
|
|
return double.PositiveInfinity;
|
|
}
|
|
break;
|
|
case ReadType.ReadAsString:
|
|
SetToken(JsonToken.String, JsonConvert.PositiveInfinity);
|
|
return JsonConvert.PositiveInfinity;
|
|
}
|
|
|
|
throw JsonReaderException.Create(this, "Cannot read Infinity value.");
|
|
}
|
|
|
|
throw JsonReaderException.Create(this, "Error parsing Infinity value.");
|
|
}
|
|
|
|
private object ParseNumberNaN(ReadType readType)
|
|
{
|
|
return ParseNumberNaN(readType, MatchValueWithTrailingSeparator(JsonConvert.NaN));
|
|
}
|
|
|
|
private object ParseNumberNaN(ReadType readType, bool matched)
|
|
{
|
|
if (matched)
|
|
{
|
|
switch (readType)
|
|
{
|
|
case ReadType.Read:
|
|
case ReadType.ReadAsDouble:
|
|
if (_floatParseHandling == FloatParseHandling.Double)
|
|
{
|
|
SetToken(JsonToken.Float, double.NaN);
|
|
return double.NaN;
|
|
}
|
|
break;
|
|
case ReadType.ReadAsString:
|
|
SetToken(JsonToken.String, JsonConvert.NaN);
|
|
return JsonConvert.NaN;
|
|
}
|
|
|
|
throw JsonReaderException.Create(this, "Cannot read NaN value.");
|
|
}
|
|
|
|
throw JsonReaderException.Create(this, "Error parsing NaN value.");
|
|
}
|
|
|
|
/// <summary>
|
|
/// Changes the reader's state to <see cref="JsonReader.State.Closed"/>.
|
|
/// If <see cref="JsonReader.CloseInput"/> is set to <c>true</c>, the underlying <see cref="TextReader"/> is also closed.
|
|
/// </summary>
|
|
public override void Close()
|
|
{
|
|
base.Close();
|
|
|
|
if (_chars != null)
|
|
{
|
|
BufferUtils.ReturnBuffer(_arrayPool, _chars);
|
|
_chars = null;
|
|
}
|
|
|
|
if (CloseInput)
|
|
{
|
|
#if HAVE_STREAM_READER_WRITER_CLOSE
|
|
_reader?.Close();
|
|
#else
|
|
_reader?.Dispose();
|
|
#endif
|
|
}
|
|
|
|
_stringBuffer.Clear(_arrayPool);
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets a value indicating whether the class can return line information.
|
|
/// </summary>
|
|
/// <returns>
|
|
/// <c>true</c> if <see cref="JsonTextReader.LineNumber"/> and <see cref="JsonTextReader.LinePosition"/> can be provided; otherwise, <c>false</c>.
|
|
/// </returns>
|
|
public bool HasLineInfo()
|
|
{
|
|
return true;
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the current line number.
|
|
/// </summary>
|
|
/// <value>
|
|
/// The current line number or 0 if no line information is available (for example, <see cref="JsonTextReader.HasLineInfo"/> returns <c>false</c>).
|
|
/// </value>
|
|
public int LineNumber
|
|
{
|
|
get
|
|
{
|
|
if (CurrentState == State.Start && LinePosition == 0 && TokenType != JsonToken.Comment)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
return _lineNumber;
|
|
}
|
|
}
|
|
|
|
/// <summary>
|
|
/// Gets the current line position.
|
|
/// </summary>
|
|
/// <value>
|
|
/// The current line position or 0 if no line information is available (for example, <see cref="JsonTextReader.HasLineInfo"/> returns <c>false</c>).
|
|
/// </value>
|
|
public int LinePosition => _charPos - _lineStartPos;
|
|
}
|
|
}
|