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119 lines
3.3 KiB
119 lines
3.3 KiB
4 years ago
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using System;
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using System.Runtime.InteropServices;
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namespace MessagePack
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{
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// safe accessor of Single/Double's underlying byte.
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// This code is borrowed from MsgPack-Cli https://github.com/msgpack/msgpack-cli
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[StructLayout(LayoutKind.Explicit)]
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internal struct Float32Bits
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{
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[FieldOffset(0)]
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public readonly float Value;
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[FieldOffset(0)]
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public readonly Byte Byte0;
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[FieldOffset(1)]
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public readonly Byte Byte1;
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[FieldOffset(2)]
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public readonly Byte Byte2;
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[FieldOffset(3)]
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public readonly Byte Byte3;
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public Float32Bits(float value)
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{
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this = default(Float32Bits);
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this.Value = value;
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}
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public Float32Bits(byte[] bigEndianBytes, int offset)
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{
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this = default(Float32Bits);
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if (BitConverter.IsLittleEndian)
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{
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this.Byte0 = bigEndianBytes[offset + 3];
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this.Byte1 = bigEndianBytes[offset + 2];
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this.Byte2 = bigEndianBytes[offset + 1];
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this.Byte3 = bigEndianBytes[offset];
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}
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else
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{
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this.Byte0 = bigEndianBytes[offset];
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this.Byte1 = bigEndianBytes[offset + 1];
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this.Byte2 = bigEndianBytes[offset + 2];
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this.Byte3 = bigEndianBytes[offset + 3];
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}
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}
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}
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[StructLayout(LayoutKind.Explicit)]
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internal struct Float64Bits
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{
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[FieldOffset(0)]
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public readonly double Value;
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[FieldOffset(0)]
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public readonly Byte Byte0;
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[FieldOffset(1)]
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public readonly Byte Byte1;
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[FieldOffset(2)]
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public readonly Byte Byte2;
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[FieldOffset(3)]
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public readonly Byte Byte3;
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[FieldOffset(4)]
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public readonly Byte Byte4;
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[FieldOffset(5)]
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public readonly Byte Byte5;
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[FieldOffset(6)]
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public readonly Byte Byte6;
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[FieldOffset(7)]
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public readonly Byte Byte7;
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public Float64Bits(double value)
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{
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this = default(Float64Bits);
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this.Value = value;
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}
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public Float64Bits(byte[] bigEndianBytes, int offset)
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{
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this = default(Float64Bits);
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if (BitConverter.IsLittleEndian)
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{
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this.Byte0 = bigEndianBytes[offset + 7];
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this.Byte1 = bigEndianBytes[offset + 6];
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this.Byte2 = bigEndianBytes[offset + 5];
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this.Byte3 = bigEndianBytes[offset + 4];
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this.Byte4 = bigEndianBytes[offset + 3];
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this.Byte5 = bigEndianBytes[offset + 2];
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this.Byte6 = bigEndianBytes[offset + 1];
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this.Byte7 = bigEndianBytes[offset];
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}
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else
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{
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this.Byte0 = bigEndianBytes[offset];
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this.Byte1 = bigEndianBytes[offset + 1];
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this.Byte2 = bigEndianBytes[offset + 2];
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this.Byte3 = bigEndianBytes[offset + 3];
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this.Byte4 = bigEndianBytes[offset + 4];
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this.Byte5 = bigEndianBytes[offset + 5];
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this.Byte6 = bigEndianBytes[offset + 6];
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this.Byte7 = bigEndianBytes[offset + 7];
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}
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}
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}
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}
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