/// <summary>
/// Gets the formats that are currently available on the clipboard.
/// </summary>
public unsafe static uint[] GetAvailableClipboardFormats()
{
uint count;
Span <uint> initialBuffer = stackalloc uint[5];
ValueBuffer <uint> buffer = new ValueBuffer <uint>(initialBuffer);
while (!Imports.GetUpdatedClipboardFormats(ref MemoryMarshal.GetReference(buffer.Span), (uint)buffer.Length, out count))
{
Error.ThrowIfLastErrorNot(WindowsError.ERROR_INSUFFICIENT_BUFFER);
buffer.EnsureCapacity((int)count);
}
return(buffer.Span.Slice(0, (int)count).ToArray());
}
private unsafe void CheckAlignment <T>(int alignment) where T : unmanaged
{
ValueBuffer <T> t = new ValueBuffer <T>();
try
{
t.EnsureCapacity(42);
void *p = Unsafe.AsPointer(ref t.Span[0]);
ulong address = (ulong)p;
int sizeOfT = Unsafe.SizeOf <T>();
int offset = (int)(address % (ulong)alignment);
offset.Should().Be(0);
}
finally
{
t.Dispose();
}
}
public unsafe string GetTestValueBuffer()
{
Span <char> stack = stackalloc char[128];
ValueBuffer <char> buffer = new ValueBuffer <char>(stack);
fixed(char *n = "USERNAME")
fixed(char *c = &buffer[0])
{
uint returnValue;
while ((returnValue = Imports.GetEnvironmentVariableW(n, c, (uint)buffer.Length)) > buffer.Length)
{
buffer.EnsureCapacity((int)returnValue);
}
if (returnValue == 0)
{
Error.ThrowIfLastErrorNot(WindowsError.ERROR_ENVVAR_NOT_FOUND);
return(string.Empty);
}
return(new string(buffer.Span.Slice(0, (int)returnValue)));
}
}
