public void ReadInt32_BlittableObject_ReturnsExpected()
{
int offset1 = Marshal.OffsetOf <BlittableStruct>(nameof(BlittableStruct.value1)).ToInt32();
int offset2 = Marshal.OffsetOf <BlittableStruct>(nameof(BlittableStruct.value2)).ToInt32();
object structure = new BlittableStruct
{
value1 = 10,
value2 = 20
};
Assert.Equal(10, Marshal.ReadInt32(structure, offset1));
Assert.Equal(20, Marshal.ReadInt32(structure, offset2));
}
public void WriteIntPtr_BlittableObject_Roundtrips()
{
int offset1 = Marshal.OffsetOf <BlittableStruct>(nameof(BlittableStruct.value1)).ToInt32();
int offset2 = Marshal.OffsetOf <BlittableStruct>(nameof(BlittableStruct.value2)).ToInt32();
object structure = new BlittableStruct
{
value1 = (IntPtr)10,
value2 = (IntPtr)20
};
Marshal.WriteIntPtr(structure, offset1, (IntPtr)11);
Marshal.WriteIntPtr(structure, offset2, (IntPtr)21);
Assert.Equal((IntPtr)11, ((BlittableStruct)structure).value1);
Assert.Equal((IntPtr)21, ((BlittableStruct)structure).value2);
Assert.Equal((IntPtr)11, Marshal.ReadIntPtr(structure, offset1));
Assert.Equal((IntPtr)21, Marshal.ReadIntPtr(structure, offset2));
}
public void WriteByte_BlittableObject_Roundtrips()
{
int offset1 = Marshal.OffsetOf <BlittableStruct>(nameof(BlittableStruct.value1)).ToInt32();
int offset2 = Marshal.OffsetOf <BlittableStruct>(nameof(BlittableStruct.value2)).ToInt32();
object structure = new BlittableStruct
{
value1 = 10,
value2 = 20
};
Marshal.WriteByte(structure, offset1, 11);
Marshal.WriteByte(structure, offset2, 21);
Assert.Equal(11, ((BlittableStruct)structure).value1);
Assert.Equal(21, ((BlittableStruct)structure).value2);
Assert.Equal(11, Marshal.ReadByte(structure, offset1));
Assert.Equal(21, Marshal.ReadByte(structure, offset2));
}
public void TestBlittableStruct()
{
BlittableStruct blittableStruct = new BlittableStruct();
blittableStruct._a = 200;
blittableStruct._b = 300;
blittableStruct._c = 10;
blittableStruct._d = 123;
blittableStruct._p = new IntPtr(100);
object boxedBlittableStruct = (object)blittableStruct;
int offsetOfB = Marshal.OffsetOf <BlittableStruct>("_b").ToInt32();
int offsetOfC = Marshal.OffsetOf <BlittableStruct>("_c").ToInt32();
int offsetOfD = Marshal.OffsetOf <BlittableStruct>("_d").ToInt32();
int offsetOfP = Marshal.OffsetOf <BlittableStruct>("_p").ToInt32();
Assert.Equal(200, Marshal.ReadInt32(boxedBlittableStruct, 0));
Assert.Equal(300, Marshal.ReadInt32(boxedBlittableStruct, offsetOfB));
Assert.Equal(10, Marshal.ReadByte(boxedBlittableStruct, offsetOfC));
Assert.Equal(123, Marshal.ReadInt16(boxedBlittableStruct, offsetOfD));
Assert.Equal(new IntPtr(100), Marshal.ReadIntPtr(boxedBlittableStruct, offsetOfP));
Marshal.WriteInt32(boxedBlittableStruct, 0, 300);
Marshal.WriteInt32(boxedBlittableStruct, offsetOfB, 400);
Marshal.WriteByte(boxedBlittableStruct, offsetOfC, 20);
Marshal.WriteInt16(boxedBlittableStruct, offsetOfD, 144);
Marshal.WriteIntPtr(boxedBlittableStruct, offsetOfP, new IntPtr(500));
Assert.Equal(300, ((BlittableStruct)boxedBlittableStruct)._a);
Assert.Equal(400, ((BlittableStruct)boxedBlittableStruct)._b);
Assert.Equal(20, ((BlittableStruct)boxedBlittableStruct)._c);
Assert.Equal(144, ((BlittableStruct)boxedBlittableStruct)._d);
Assert.Equal(new IntPtr(500), ((BlittableStruct)boxedBlittableStruct)._p);
}