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| 1 | +using System; |
| 2 | +using System.Collections.Generic; |
| 3 | + |
| 4 | +// ReSharper disable once CheckNamespace |
| 5 | +namespace GameDevWare.Serialization.MessagePack |
| 6 | +{ |
| 7 | + public sealed class DefaultMessagePackExtensionTypeHandler : MessagePackExtensionTypeHandler |
| 8 | + { |
| 9 | + public const int EXTENSION_TYPE_TIMESTAMP = -1; |
| 10 | + public const int EXTENSION_TYPE_DATE_TIME = 40; |
| 11 | + public const int EXTENSION_TYPE_DATE_TIME_OFFSET = 41; |
| 12 | + public const int EXTENSION_TYPE_DECIMAL = 42; |
| 13 | + public const int EXTENSION_TYPE_GUID = 43; |
| 14 | + public const int GUID_SIZE = 16; |
| 15 | + public const int DECIMAL_SIZE = 16; |
| 16 | + public const int DATE_TIME_SIZE = 16; |
| 17 | + public const int DATE_TIME_OFFSET_SIZE = 16; |
| 18 | + |
| 19 | + private static readonly Type[] DefaultExtensionTypes = new[] { typeof(decimal), typeof(DateTime), typeof(DateTimeOffset), typeof(Guid), typeof(DateTimeOffset), typeof(MessagePackTimestamp) }; |
| 20 | + public static DefaultMessagePackExtensionTypeHandler Instance = new DefaultMessagePackExtensionTypeHandler(EndianBitConverter.Little); |
| 21 | + |
| 22 | + private readonly EndianBitConverter bitConverter; |
| 23 | + |
| 24 | + public override IEnumerable<Type> ExtensionTypes |
| 25 | + { |
| 26 | + get { return DefaultExtensionTypes; } |
| 27 | + } |
| 28 | + |
| 29 | + internal DefaultMessagePackExtensionTypeHandler(EndianBitConverter bitConverter) |
| 30 | + { |
| 31 | + if (bitConverter == null) throw new ArgumentNullException("bitConverter"); |
| 32 | + |
| 33 | + this.bitConverter = bitConverter; |
| 34 | + } |
| 35 | + |
| 36 | + /// <inheritdoc /> |
| 37 | + public override bool TryRead(sbyte type, ArraySegment<byte> data, out object value) |
| 38 | + { |
| 39 | + if (data.Array == null) throw new ArgumentNullException("data"); |
| 40 | + |
| 41 | + value = default(object); |
| 42 | + switch (type) |
| 43 | + { |
| 44 | + case EXTENSION_TYPE_TIMESTAMP: |
| 45 | + unchecked |
| 46 | + { |
| 47 | + var seconds = 0L; |
| 48 | + var nanoSeconds = 0u; |
| 49 | + switch (data.Count) |
| 50 | + { |
| 51 | + case 4: |
| 52 | + seconds = this.bitConverter.ToInt32(data.Array, data.Offset); |
| 53 | + value = new MessagePackTimestamp(seconds, nanoSeconds); |
| 54 | + return true; |
| 55 | + case 8: |
| 56 | + var data64 = this.bitConverter.ToUInt64(data.Array, data.Offset); |
| 57 | + seconds = (int)(data64 & 0x00000003ffffffffL); |
| 58 | + nanoSeconds = (uint)(data64 >> 34 & uint.MaxValue); |
| 59 | + value = new MessagePackTimestamp(seconds, nanoSeconds); |
| 60 | + return true; |
| 61 | + case 12: |
| 62 | + nanoSeconds = this.bitConverter.ToUInt32(data.Array, data.Offset); |
| 63 | + seconds = this.bitConverter.ToInt64(data.Array, data.Offset + 4); |
| 64 | + value = new MessagePackTimestamp(seconds, nanoSeconds); |
| 65 | + return true; |
| 66 | + default: |
| 67 | + return false; |
| 68 | + } |
| 69 | + } |
| 70 | + case EXTENSION_TYPE_DATE_TIME: |
| 71 | + if (data.Count != DATE_TIME_SIZE) |
| 72 | + return false; |
| 73 | + var dateTime = new DateTime(this.bitConverter.ToInt64(data.Array, data.Offset + 1), (DateTimeKind)data.Array[data.Offset]); |
| 74 | + value = dateTime; |
| 75 | + return true; |
| 76 | + case EXTENSION_TYPE_DATE_TIME_OFFSET: |
| 77 | + if (data.Count != DATE_TIME_OFFSET_SIZE) |
| 78 | + return false; |
| 79 | + var offset = new TimeSpan(this.bitConverter.ToInt64(data.Array, data.Offset + 8)); |
| 80 | + var ticks = this.bitConverter.ToInt64(data.Array, data.Offset); |
| 81 | + var dateTimeOffset = new DateTimeOffset(ticks, offset); |
| 82 | + value = dateTimeOffset; |
| 83 | + return true; |
| 84 | + case EXTENSION_TYPE_DECIMAL: |
| 85 | + if (data.Count != DECIMAL_SIZE) |
| 86 | + return false; |
| 87 | + var decimalValue = this.bitConverter.ToDecimal(data.Array, data.Offset); |
| 88 | + value = decimalValue; |
| 89 | + return true; |
| 90 | + case EXTENSION_TYPE_GUID: |
| 91 | + if (data.Count != GUID_SIZE) |
| 92 | + return false; |
| 93 | + |
| 94 | + var buffer = data.Array; |
| 95 | + var guidValue = new Guid |
| 96 | + ( |
| 97 | + this.bitConverter.ToUInt32(buffer, data.Offset), |
| 98 | + this.bitConverter.ToUInt16(buffer, data.Offset + 4), |
| 99 | + this.bitConverter.ToUInt16(buffer, data.Offset + 6), |
| 100 | + buffer[data.Offset + 8], |
| 101 | + buffer[data.Offset + 9], |
| 102 | + buffer[data.Offset + 10], |
| 103 | + buffer[data.Offset + 11], |
| 104 | + buffer[data.Offset + 12], |
| 105 | + buffer[data.Offset + 13], |
| 106 | + buffer[data.Offset + 14], |
| 107 | + buffer[data.Offset + 15] |
| 108 | + ); |
| 109 | + value = guidValue; |
| 110 | + return true; |
| 111 | + default: |
| 112 | + return false; |
| 113 | + } |
| 114 | + } |
| 115 | + /// <inheritdoc /> |
| 116 | + public override bool TryWrite(object value, out sbyte type, ref ArraySegment<byte> data) |
| 117 | + { |
| 118 | + if (value == null) |
| 119 | + { |
| 120 | + type = 0; |
| 121 | + return false; |
| 122 | + } |
| 123 | + else if (value is DateTime) |
| 124 | + { |
| 125 | + type = EXTENSION_TYPE_DATE_TIME; |
| 126 | + if (data.Array == null || data.Count < DATE_TIME_SIZE) |
| 127 | + data = new ArraySegment<byte>(new byte[DATE_TIME_SIZE]); |
| 128 | + |
| 129 | + var dateTime = (DateTime)(object)value; |
| 130 | + Array.Clear(data.Array, data.Offset, DATE_TIME_SIZE); |
| 131 | + this.bitConverter.CopyBytes(dateTime.Ticks, data.Array, data.Offset + 1); |
| 132 | + data.Array[data.Offset] = (byte)dateTime.Kind; |
| 133 | + |
| 134 | + if (data.Count != DATE_TIME_SIZE) |
| 135 | + data = new ArraySegment<byte>(data.Array, data.Offset, DATE_TIME_SIZE); |
| 136 | + return true; |
| 137 | + } |
| 138 | + else if (value is DateTimeOffset) |
| 139 | + { |
| 140 | + type = EXTENSION_TYPE_DATE_TIME_OFFSET; |
| 141 | + if (data.Array == null || data.Count < DATE_TIME_OFFSET_SIZE) |
| 142 | + data = new ArraySegment<byte>(new byte[DATE_TIME_OFFSET_SIZE]); |
| 143 | + |
| 144 | + var dateTimeOffset = (DateTimeOffset)(object)value; |
| 145 | + this.bitConverter.CopyBytes(dateTimeOffset.DateTime.Ticks, data.Array, data.Offset); |
| 146 | + this.bitConverter.CopyBytes(dateTimeOffset.Offset.Ticks, data.Array, data.Offset + 8); |
| 147 | + |
| 148 | + if (data.Count != DATE_TIME_OFFSET_SIZE) |
| 149 | + data = new ArraySegment<byte>(data.Array, data.Offset, DATE_TIME_OFFSET_SIZE); |
| 150 | + return true; |
| 151 | + } |
| 152 | + else if (value is decimal) |
| 153 | + { |
| 154 | + |
| 155 | + type = EXTENSION_TYPE_DECIMAL; |
| 156 | + if (data.Array == null || data.Count < DECIMAL_SIZE) |
| 157 | + data = new ArraySegment<byte>(new byte[DECIMAL_SIZE]); |
| 158 | + |
| 159 | + var number = (decimal)(object)value; |
| 160 | + this.bitConverter.CopyBytes(number, data.Array, data.Offset); |
| 161 | + |
| 162 | + if (data.Count != DECIMAL_SIZE) |
| 163 | + data = new ArraySegment<byte>(data.Array, data.Offset, DECIMAL_SIZE); |
| 164 | + return true; |
| 165 | + } |
| 166 | + else if (value is Guid) |
| 167 | + { |
| 168 | + type = EXTENSION_TYPE_GUID; |
| 169 | + var guid = (Guid)(object)value; |
| 170 | + data = new ArraySegment<byte>(guid.ToByteArray()); |
| 171 | + return true; |
| 172 | + } |
| 173 | + else if (value is MessagePackTimestamp) |
| 174 | + { |
| 175 | + type = EXTENSION_TYPE_TIMESTAMP; |
| 176 | + var timestamp = (MessagePackTimestamp)(object)value; |
| 177 | + |
| 178 | + unchecked |
| 179 | + { |
| 180 | + |
| 181 | + if (timestamp.Seconds <= int.MaxValue && timestamp.Seconds >= int.MinValue) |
| 182 | + { |
| 183 | + if (timestamp.NanoSeconds == 0) |
| 184 | + { |
| 185 | + const int TIMESTAMP_SIZE = 4; |
| 186 | + |
| 187 | + if (data.Array == null || data.Count < TIMESTAMP_SIZE) |
| 188 | + data = new ArraySegment<byte>(new byte[TIMESTAMP_SIZE]); |
| 189 | + |
| 190 | + // timestamp 32 |
| 191 | + this.bitConverter.CopyBytes((int)timestamp.Seconds, data.Array, data.Offset); |
| 192 | + |
| 193 | + if (data.Count != TIMESTAMP_SIZE) |
| 194 | + data = new ArraySegment<byte>(data.Array, data.Offset, TIMESTAMP_SIZE); |
| 195 | + } |
| 196 | + else |
| 197 | + { |
| 198 | + const int TIMESTAMP_SIZE = 8; |
| 199 | + |
| 200 | + if (data.Array == null || data.Count < TIMESTAMP_SIZE) |
| 201 | + data = new ArraySegment<byte>(new byte[TIMESTAMP_SIZE]); |
| 202 | + |
| 203 | + var data64 = ((ulong)timestamp.NanoSeconds << 34) | ((ulong)timestamp.Seconds & uint.MaxValue); |
| 204 | + // timestamp 64 |
| 205 | + this.bitConverter.CopyBytes(data64, data.Array, data.Offset); |
| 206 | + |
| 207 | + if (data.Count != TIMESTAMP_SIZE) |
| 208 | + data = new ArraySegment<byte>(data.Array, data.Offset, TIMESTAMP_SIZE); |
| 209 | + } |
| 210 | + } |
| 211 | + else |
| 212 | + { |
| 213 | + const int TIMESTAMP_SIZE = 12; |
| 214 | + |
| 215 | + if (data.Array == null || data.Count < TIMESTAMP_SIZE) |
| 216 | + data = new ArraySegment<byte>(new byte[TIMESTAMP_SIZE]); |
| 217 | + |
| 218 | + // timestamp 96 |
| 219 | + this.bitConverter.CopyBytes(timestamp.NanoSeconds, data.Array, data.Offset); |
| 220 | + this.bitConverter.CopyBytes(timestamp.Seconds, data.Array, data.Offset + 4); |
| 221 | + |
| 222 | + if (data.Count != TIMESTAMP_SIZE) |
| 223 | + data = new ArraySegment<byte>(data.Array, data.Offset, TIMESTAMP_SIZE); |
| 224 | + } |
| 225 | + } |
| 226 | + return true; |
| 227 | + } |
| 228 | + else |
| 229 | + { |
| 230 | + type = default(sbyte); |
| 231 | + return false; |
| 232 | + } |
| 233 | + } |
| 234 | + } |
| 235 | +} |
| 236 | + |
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