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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org 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 version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 License.
*
************************************************************************/
#include "bridges/cpp_uno/shared/vtables.hxx"
#include "osl/diagnose.h"
#include "sal/types.h"
#include "typelib/typedescription.h"
#include <algorithm>
namespace
{
/**
* Calculates the number of vtables associated with an interface type.
*
* <p>Multiple-inheritance C++ classes have more than one vtable.</p>
*
* @param type a non-null pointer to an interface type description
* @return the number of vtables associated with the given interface type
*/
sal_Int32 getVtableCount(typelib_InterfaceTypeDescription const * type) {
sal_Int32 n = 0;
for (sal_Int32 i = 0; i < type->nBaseTypes; ++i) {
n += getVtableCount(type->ppBaseTypes[i]);
}
return std::max< sal_Int32 >(n, 1);
}
/**
* Maps a local member index to a local function index.
*
* <p><em>Local</em> members/functions are those not inherited from any base
* types. The number of <em>functions</em> is potentially larger than the
* number of <em>members</em>, as each read–write attribute member counts
* as two functions.</p>
*
* @param type a non-null pointer to an interface type description
* @param localMember a local member index, relative to the given interface type
* @return the local function index corresponding to the given local member
* index, relative to the given interface type
*/
sal_Int32 mapLocalMemberToLocalFunction(
typelib_InterfaceTypeDescription * type, sal_Int32 localMember)
{
typelib_typedescription_complete(
reinterpret_cast< typelib_TypeDescription ** >(&type));
sal_Int32 localMemberOffset = type->nAllMembers - type->nMembers;
sal_Int32 localFunctionOffset = type->nMapFunctionIndexToMemberIndex
- bridges::cpp_uno::shared::getLocalFunctions(type);
return type->pMapMemberIndexToFunctionIndex[localMemberOffset + localMember]
- localFunctionOffset;
}
// Since on Solaris we compile with --instances=static, getVtableSlot cannot be
// a template function, with explicit instantiates for
// T = typelib_InterfaceAttributeTypeDescription and
// T = typelib_InterfaceMethodTypeDescription in this file; hence, there are two
// overloaded versions of getVtableSlot that both delegate to this template
// function:
template< typename T > bridges::cpp_uno::shared::VtableSlot doGetVtableSlot(
T const * ifcMember)
{
bridges::cpp_uno::shared::VtableSlot slot;
slot.offset = 0;
T * member = const_cast< T * >(ifcMember);
while (member->pBaseRef != 0) {
OSL_ASSERT(member->nIndex < member->pInterface->nBaseTypes);
for (sal_Int32 i = 0; i < member->nIndex; ++i) {
slot.offset += getVtableCount(member->pInterface->ppBaseTypes[i]);
}
typelib_TypeDescription * desc = 0;
typelib_typedescriptionreference_getDescription(
&desc, member->pBaseRef);
OSL_ASSERT(
desc != 0 && desc->eTypeClass == member->aBase.aBase.eTypeClass);
if (member != ifcMember) {
typelib_typedescription_release(&member->aBase.aBase);
}
member = reinterpret_cast< T * >(desc);
}
slot.index
= bridges::cpp_uno::shared::getPrimaryFunctions(
member->pInterface->pBaseTypeDescription)
+ mapLocalMemberToLocalFunction(member->pInterface, member->nIndex);
if (member != ifcMember) {
typelib_typedescription_release(&member->aBase.aBase);
}
return slot;
}
}
namespace bridges { namespace cpp_uno { namespace shared {
sal_Int32 getLocalFunctions(typelib_InterfaceTypeDescription const * type) {
return type->nMembers == 0
? 0
: (type->nMapFunctionIndexToMemberIndex
- type->pMapMemberIndexToFunctionIndex[
type->nAllMembers - type->nMembers]);
}
sal_Int32 getPrimaryFunctions(typelib_InterfaceTypeDescription * type) {
sal_Int32 n = 0;
for (; type != 0; type = type->pBaseTypeDescription) {
typelib_typedescription_complete(
reinterpret_cast< typelib_TypeDescription ** >(&type));
n += getLocalFunctions(type);
}
return n;
}
VtableSlot getVtableSlot(
typelib_InterfaceAttributeTypeDescription const * ifcMember)
{
return doGetVtableSlot(ifcMember);
}
VtableSlot getVtableSlot(
typelib_InterfaceMethodTypeDescription const * ifcMember)
{
return doGetVtableSlot(ifcMember);
}
} } }
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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