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/*
* Misc marshaling routines
*
* Copyright 2010 Huw Davies
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdarg.h>
#include <string.h>
#define COBJMACROS
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"
#include "objbase.h"
#include "oleauto.h"
#include "dispex.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(ole);
#define NULL_RESULT 0x20000
#define NULL_EXCEPINFO 0x40000
HRESULT CALLBACK IDispatchEx_InvokeEx_Proxy(IDispatchEx* This, DISPID id, LCID lcid, WORD wFlags,
DISPPARAMS *pdp, VARIANT *pvarRes, EXCEPINFO *pei,
IServiceProvider *pspCaller)
{
HRESULT hr;
VARIANT result;
EXCEPINFO excep_info;
UINT byref_args, arg, dummy_idx;
VARIANT dummy_arg, *ref_arg = &dummy_arg, *copy_arg, *orig_arg = NULL;
UINT *ref_idx = &dummy_idx;
DWORD dword_flags = wFlags & 0xf;
TRACE("(%p)->(%08x, %04x, %04x, %p, %p, %p, %p)\n", This, id, lcid, wFlags,
pdp, pvarRes, pei, pspCaller);
if(!pvarRes)
{
pvarRes = &result;
dword_flags |= NULL_RESULT;
}
if(!pei)
{
pei = &excep_info;
dword_flags |= NULL_EXCEPINFO;
}
for(arg = 0, byref_args = 0; arg < pdp->cArgs; arg++)
if(V_ISBYREF(pdp->rgvarg + arg)) byref_args++;
if(byref_args)
{
DWORD size = pdp->cArgs * sizeof(VARIANT) +
byref_args * (sizeof(VARIANT) + sizeof(UINT));
copy_arg = CoTaskMemAlloc(size);
if(!copy_arg) return E_OUTOFMEMORY;
ref_arg = copy_arg + pdp->cArgs;
ref_idx = (UINT*)(ref_arg + byref_args);
/* copy the byref args to ref_arg[], the others go to copy_arg[] */
for(arg = 0, byref_args = 0; arg < pdp->cArgs; arg++)
{
if(V_ISBYREF(pdp->rgvarg + arg))
{
ref_arg[byref_args] = pdp->rgvarg[arg];
ref_idx[byref_args] = arg;
VariantInit(copy_arg + arg);
byref_args++;
}
else
copy_arg[arg] = pdp->rgvarg[arg];
}
orig_arg = pdp->rgvarg;
pdp->rgvarg = copy_arg;
}
hr = IDispatchEx_RemoteInvokeEx_Proxy(This, id, lcid, dword_flags, pdp, pvarRes, pei, pspCaller,
byref_args, ref_idx, ref_arg);
if(byref_args)
{
CoTaskMemFree(pdp->rgvarg);
pdp->rgvarg = orig_arg;
}
return hr;
}
HRESULT __RPC_STUB IDispatchEx_InvokeEx_Stub(IDispatchEx* This, DISPID id, LCID lcid, DWORD dwFlags,
DISPPARAMS *pdp, VARIANT *result, EXCEPINFO *pei,
IServiceProvider *pspCaller, UINT byref_args,
UINT *ref_idx, VARIANT *ref_arg)
{
HRESULT hr;
UINT arg;
VARTYPE *vt_list = NULL;
TRACE("(%p)->(%08x, %04x, %08x, %p, %p, %p, %p, %d, %p, %p)\n", This, id, lcid, dwFlags,
pdp, result, pei, pspCaller, byref_args, ref_idx, ref_arg);
VariantInit(result);
memset(pei, 0, sizeof(*pei));
for(arg = 0; arg < byref_args; arg++)
pdp->rgvarg[ref_idx[arg]] = ref_arg[arg];
if(dwFlags & NULL_RESULT) result = NULL;
if(dwFlags & NULL_EXCEPINFO) pei = NULL;
/* Create an array of the original VTs to check that the function doesn't change
any on return. */
if(byref_args)
{
vt_list = HeapAlloc(GetProcessHeap(), 0, pdp->cArgs * sizeof(vt_list[0]));
if(!vt_list) return E_OUTOFMEMORY;
for(arg = 0; arg < pdp->cArgs; arg++)
vt_list[arg] = V_VT(pdp->rgvarg + arg);
}
hr = IDispatchEx_InvokeEx(This, id, lcid, dwFlags & 0xffff, pdp, result, pei, pspCaller);
if(SUCCEEDED(hr) && byref_args)
{
for(arg = 0; arg < pdp->cArgs; arg++)
{
if(vt_list[arg] != V_VT(pdp->rgvarg + arg))
{
hr = DISP_E_BADCALLEE;
break;
}
}
}
if(hr == DISP_E_EXCEPTION)
{
if(pei && pei->pfnDeferredFillIn)
{
pei->pfnDeferredFillIn(pei);
pei->pfnDeferredFillIn = NULL;
}
}
for(arg = 0; arg < byref_args; arg++)
VariantInit(pdp->rgvarg + ref_idx[arg]);
HeapFree(GetProcessHeap(), 0, vt_list);
return hr;
}