/// <inheritdoc />
public ErrorCode SCardListReaderGroups(IntPtr context, ref IntPtr groups, ref uint size)
{
ErrorCode err;
unsafe
{
fixed(uint *psize = &size)
{
if (size == AutoAllocate)
{
err = UnsafePrimitives.SCardListReaderGroups(
(void *)context,
(char *)groups,
psize
);
if (err == ErrorCode.Success)
{
var cgroups = new char[*psize];
fixed(char *pcgroups = cgroups)
{
err = UnsafePrimitives.SCardListReaderGroups(
(void *)context,
pcgroups,
psize
);
groups = (IntPtr)pcgroups;
}
}
}
else
{
err = UnsafePrimitives.SCardListReaderGroups(
(void *)context,
(char *)groups,
psize
);
}
size = *psize;
}
}
return(err);
}