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