330 lines
11 KiB
C#
330 lines
11 KiB
C#
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#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.Globalization;
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using System.IO;
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using System.Text;
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using LC.Newtonsoft.Json.Utilities;
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#nullable disable
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namespace LC.Newtonsoft.Json.Bson
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{
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internal class BsonBinaryWriter
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{
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private static readonly Encoding Encoding = new UTF8Encoding(false);
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private readonly BinaryWriter _writer;
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private byte[] _largeByteBuffer;
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public DateTimeKind DateTimeKindHandling { get; set; }
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public BsonBinaryWriter(BinaryWriter writer)
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{
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DateTimeKindHandling = DateTimeKind.Utc;
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_writer = writer;
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}
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public void Flush()
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{
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_writer.Flush();
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}
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public void Close()
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{
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#if HAVE_STREAM_READER_WRITER_CLOSE
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_writer.Close();
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#else
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_writer.Dispose();
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#endif
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}
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public void WriteToken(BsonToken t)
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{
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CalculateSize(t);
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WriteTokenInternal(t);
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}
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private void WriteTokenInternal(BsonToken t)
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{
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switch (t.Type)
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{
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case BsonType.Object:
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{
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BsonObject value = (BsonObject)t;
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_writer.Write(value.CalculatedSize);
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foreach (BsonProperty property in value)
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{
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_writer.Write((sbyte)property.Value.Type);
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WriteString((string)property.Name.Value, property.Name.ByteCount, null);
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WriteTokenInternal(property.Value);
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}
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_writer.Write((byte)0);
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}
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break;
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case BsonType.Array:
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{
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BsonArray value = (BsonArray)t;
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_writer.Write(value.CalculatedSize);
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ulong index = 0;
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foreach (BsonToken c in value)
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{
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_writer.Write((sbyte)c.Type);
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WriteString(index.ToString(CultureInfo.InvariantCulture), MathUtils.IntLength(index), null);
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WriteTokenInternal(c);
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index++;
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}
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_writer.Write((byte)0);
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}
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break;
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case BsonType.Integer:
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{
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BsonValue value = (BsonValue)t;
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_writer.Write(Convert.ToInt32(value.Value, CultureInfo.InvariantCulture));
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}
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break;
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case BsonType.Long:
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{
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BsonValue value = (BsonValue)t;
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_writer.Write(Convert.ToInt64(value.Value, CultureInfo.InvariantCulture));
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}
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break;
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case BsonType.Number:
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{
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BsonValue value = (BsonValue)t;
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_writer.Write(Convert.ToDouble(value.Value, CultureInfo.InvariantCulture));
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}
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break;
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case BsonType.String:
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{
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BsonString value = (BsonString)t;
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WriteString((string)value.Value, value.ByteCount, value.CalculatedSize - 4);
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}
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break;
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case BsonType.Boolean:
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_writer.Write(t == BsonBoolean.True);
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break;
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case BsonType.Null:
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case BsonType.Undefined:
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break;
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case BsonType.Date:
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{
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BsonValue value = (BsonValue)t;
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long ticks = 0;
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if (value.Value is DateTime dateTime)
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{
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if (DateTimeKindHandling == DateTimeKind.Utc)
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{
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dateTime = dateTime.ToUniversalTime();
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}
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else if (DateTimeKindHandling == DateTimeKind.Local)
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{
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dateTime = dateTime.ToLocalTime();
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}
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ticks = DateTimeUtils.ConvertDateTimeToJavaScriptTicks(dateTime, false);
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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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DateTimeOffset dateTimeOffset = (DateTimeOffset)value.Value;
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ticks = DateTimeUtils.ConvertDateTimeToJavaScriptTicks(dateTimeOffset.UtcDateTime, dateTimeOffset.Offset);
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}
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#endif
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_writer.Write(ticks);
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}
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break;
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case BsonType.Binary:
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{
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BsonBinary value = (BsonBinary)t;
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byte[] data = (byte[])value.Value;
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_writer.Write(data.Length);
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_writer.Write((byte)value.BinaryType);
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_writer.Write(data);
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}
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break;
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case BsonType.Oid:
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{
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BsonValue value = (BsonValue)t;
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byte[] data = (byte[])value.Value;
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_writer.Write(data);
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}
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break;
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case BsonType.Regex:
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{
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BsonRegex value = (BsonRegex)t;
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WriteString((string)value.Pattern.Value, value.Pattern.ByteCount, null);
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WriteString((string)value.Options.Value, value.Options.ByteCount, null);
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}
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break;
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default:
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throw new ArgumentOutOfRangeException(nameof(t), "Unexpected token when writing BSON: {0}".FormatWith(CultureInfo.InvariantCulture, t.Type));
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}
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}
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private void WriteString(string s, int byteCount, int? calculatedlengthPrefix)
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{
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if (calculatedlengthPrefix != null)
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{
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_writer.Write(calculatedlengthPrefix.GetValueOrDefault());
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}
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WriteUtf8Bytes(s, byteCount);
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_writer.Write((byte)0);
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}
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public void WriteUtf8Bytes(string s, int byteCount)
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{
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if (s != null)
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{
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if (byteCount <= 256)
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{
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if (_largeByteBuffer == null)
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{
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_largeByteBuffer = new byte[256];
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}
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Encoding.GetBytes(s, 0, s.Length, _largeByteBuffer, 0);
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_writer.Write(_largeByteBuffer, 0, byteCount);
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}
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else
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{
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byte[] bytes = Encoding.GetBytes(s);
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_writer.Write(bytes);
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}
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}
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}
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private int CalculateSize(int stringByteCount)
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{
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return stringByteCount + 1;
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}
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private int CalculateSizeWithLength(int stringByteCount, bool includeSize)
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{
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int baseSize = (includeSize)
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? 5 // size bytes + terminator
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: 1; // terminator
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return baseSize + stringByteCount;
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}
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private int CalculateSize(BsonToken t)
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{
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switch (t.Type)
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{
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case BsonType.Object:
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{
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BsonObject value = (BsonObject)t;
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int bases = 4;
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foreach (BsonProperty p in value)
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{
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int size = 1;
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size += CalculateSize(p.Name);
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size += CalculateSize(p.Value);
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bases += size;
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}
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bases += 1;
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value.CalculatedSize = bases;
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return bases;
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}
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case BsonType.Array:
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{
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BsonArray value = (BsonArray)t;
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int size = 4;
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ulong index = 0;
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foreach (BsonToken c in value)
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{
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size += 1;
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size += CalculateSize(MathUtils.IntLength(index));
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size += CalculateSize(c);
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index++;
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}
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size += 1;
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value.CalculatedSize = size;
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return value.CalculatedSize;
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}
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case BsonType.Integer:
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return 4;
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case BsonType.Long:
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return 8;
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case BsonType.Number:
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return 8;
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case BsonType.String:
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{
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BsonString value = (BsonString)t;
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string s = (string)value.Value;
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value.ByteCount = (s != null) ? Encoding.GetByteCount(s) : 0;
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value.CalculatedSize = CalculateSizeWithLength(value.ByteCount, value.IncludeLength);
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return value.CalculatedSize;
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}
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case BsonType.Boolean:
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return 1;
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case BsonType.Null:
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case BsonType.Undefined:
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return 0;
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case BsonType.Date:
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return 8;
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case BsonType.Binary:
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{
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BsonBinary value = (BsonBinary)t;
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byte[] data = (byte[])value.Value;
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value.CalculatedSize = 4 + 1 + data.Length;
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return value.CalculatedSize;
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}
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case BsonType.Oid:
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return 12;
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case BsonType.Regex:
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{
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BsonRegex value = (BsonRegex)t;
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int size = 0;
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size += CalculateSize(value.Pattern);
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size += CalculateSize(value.Options);
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value.CalculatedSize = size;
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return value.CalculatedSize;
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}
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default:
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throw new ArgumentOutOfRangeException(nameof(t), "Unexpected token when writing BSON: {0}".FormatWith(CultureInfo.InvariantCulture, t.Type));
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}
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}
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}
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}
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