public static unsafe ItemIdList Create(IMalloc m, params byte[][] data)
{
//if (m == null)
{
// throw new ArgumentNullException("m");
}
int len = ItemId.HeaderSize; // terminator
foreach (byte[] item in data)
{
len += item.Length + ItemId.HeaderSize;
}
IntPtr p = (m == null) ? Marshal.AllocCoTaskMem(len) : m.Alloc(len);
if (p == IntPtr.Zero)
{
throw new OutOfMemoryException("Shell failed to allocate ITEMIDLIST");
}
IntPtr workingP = p;
foreach (byte[] item in data)
{
*((ushort *)workingP) = checked ((ushort)(item.Length + ItemId.HeaderSize));
workingP = (IntPtr)((int)workingP + ItemId.HeaderSize);
Marshal.Copy(item, 0, workingP, item.Length);
workingP = (IntPtr)((int)workingP + item.Length);
}
*((ushort *)workingP) = 0;
return(new ItemIdList(p));
}
public IntPtr Alloc(int cb)
{
return(m.Alloc(cb));
}