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EFIDevices.cs
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EFIDevices.cs
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using System.Runtime.InteropServices;
public static unsafe class EFIDevice
{
public const byte EfiDpTypeMask = 0x7F;
public const byte EfiDpTypeUnpacked = 0x80;
public const byte EndDevicePathType = 0x7f;
public const byte EndEntireDevicePathSubtype = 0xff;
public const byte EndInstanceDevicePathSubtype = 0x01;
public static bool DP_IS_END_SUBTYPE(EfiDevicePathProtocol* a)
{
return a->SubType == EndEntireDevicePathSubtype;
}
public static byte DevicePathType(EfiDevicePathProtocol* a)
{
return (byte) (a->Type & EfiDpTypeMask);
}
public static byte DevicePathSubType(EfiDevicePathProtocol* a)
{
return a->SubType;
}
public static ulong DevicePathNodeLength(EfiDevicePathProtocol* a)
{
return (ulong) (a->Length[0] | (a->Length[1] << 8));
}
public static EfiDevicePathProtocol* NextDevicePathNode(EfiDevicePathProtocol* a)
{
return (EfiDevicePathProtocol*) ((byte*) a + DevicePathNodeLength(a));
}
public static bool IsDevicePathEndType(EfiDevicePathProtocol* a)
{
return DevicePathType(a) == EndDevicePathType;
}
public static bool IsDevicePathEndSubType(EfiDevicePathProtocol* a)
{
return a->SubType == EndEntireDevicePathSubtype;
}
public static bool IsDevicePathEnd(EfiDevicePathProtocol* a)
{
return IsDevicePathEndType(a) && IsDevicePathEndSubType(a);
}
public static bool IsDevicePathUnpacked(EfiDevicePathProtocol* a)
{
return (a->Type & EfiDpTypeUnpacked) != 0;
}
}
[StructLayout(LayoutKind.Sequential)]
public unsafe struct EfiDevicePathProtocol
{
public byte Type;
public byte SubType;
public fixed byte Length[2];
}