AnsiBSTRMarshaler.cs

Go to the documentation of this file.

using System.Runtime.InteropServices;
 
namespace System.StubHelpers;
 
internal static class AnsiBSTRMarshaler
{
    internal unsafe static IntPtr ConvertToNative(int flags, string strManaged)
    {
        if (strManaged == null)
        {
            return IntPtr.Zero;
        }
        byte[] array = null;
        int cbLength = 0;
        if (strManaged.Length > 0)
        {
            array = AnsiCharMarshaler.DoAnsiConversion(strManaged, (flags & 0xFF) != 0, flags >> 8 != 0, out cbLength);
        }
        uint num = (uint)cbLength;
        IntPtr intPtr = Marshal.AllocBSTRByteLen(num);
        if (array != null)
        {
            Buffer.Memmove(ref *(byte*)(void*)intPtr, ref MemoryMarshal.GetArrayDataReference(array), num);
        }
        return intPtr;
    }
 
    internal unsafe static string ConvertToManaged(IntPtr bstr)
    {
        if (IntPtr.Zero == bstr)
        {
            return null;
        }
        return new string((sbyte*)(void*)bstr);
    }
 
    internal static void ClearNative(IntPtr pNative)
    {
        Marshal.FreeBSTR(pNative);
    }
}