/*****************************************************************************
 * utils.cpp: ActiveX control for VLC
 *****************************************************************************
 * Copyright (C) 2005 VideoLAN
 *
 * Authors: Damien Fouilleul <Damien.Fouilleul@laposte.net>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
 *****************************************************************************/

#include "utils.h"

/*
** conversion facilities
*/

using namespace std;

char *CStrFromBSTR(int codePage, BSTR bstr)
{
    UINT len = SysStringLen(bstr);
    if( len > 0 )
    {
        size_t mblen = WideCharToMultiByte(codePage,
                0, bstr, len, NULL, 0, NULL, NULL);
        if( mblen > 0 )
        {
            char *buffer = (char *)malloc(mblen+1);
            ZeroMemory(buffer, mblen+1);
            if( WideCharToMultiByte(CP_ACP, 0, bstr, len, buffer, mblen, NULL, NULL) )
                return buffer;
        }
    }
    return NULL;
};

BSTR BSTRFromCStr(int codePage, const char *s)
{
    int wideLen = MultiByteToWideChar(codePage, 0, s, -1, NULL, 0);
    if( wideLen )
    {
        WCHAR* wideStr = (WCHAR*)malloc(wideLen*sizeof(WCHAR));
        if( NULL != wideStr )
        {
            BSTR bstr;

            ZeroMemory(wideStr, wideLen*sizeof(WCHAR));
            MultiByteToWideChar(codePage, 0, s, -1, wideStr, wideLen);
            bstr = SysAllocString(wideStr);
            free(wideStr);

            return bstr;
        }
    }
    return NULL;
};

/*
**  properties
*/

HRESULT GetObjectProperty(LPUNKNOWN object, DISPID dispID, VARIANT& v)
{
    IDispatch *pDisp;
    HRESULT hr = object->QueryInterface(IID_IDispatch, (LPVOID *)&pDisp);
    if( SUCCEEDED(hr) )
    {
        DISPPARAMS dispparamsNoArgs = {NULL, NULL, 0, 0};
        VARIANT vres;
        hr = pDisp->Invoke(dispID, IID_NULL, LOCALE_USER_DEFAULT,
                DISPATCH_PROPERTYGET, &dispparamsNoArgs, &vres, NULL, NULL);
        if( SUCCEEDED(hr) )
        {
            if( V_VT(&v) != V_VT(&vres) )
            {
                hr = VariantChangeType(&v, &vres, 0, V_VT(&v));
                VariantClear(&vres);
            }
            else
            {
                v = vres;
            }
        }
        pDisp->Release();
    }
    return hr;
};


