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Diffstat (limited to 'bridges/source/cpp_uno/shared/vtables.cxx')
-rw-r--r-- | bridges/source/cpp_uno/shared/vtables.cxx | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/bridges/source/cpp_uno/shared/vtables.cxx b/bridges/source/cpp_uno/shared/vtables.cxx new file mode 100644 index 000000000000..a18e04a8da71 --- /dev/null +++ b/bridges/source/cpp_uno/shared/vtables.cxx @@ -0,0 +1,157 @@ +/************************************************************************* + * + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. + * + * Copyright 2008 by Sun Microsystems, Inc. + * + * OpenOffice.org - a multi-platform office productivity suite + * + * $RCSfile: vtables.cxx,v $ + * $Revision: 1.5 $ + * + * 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. + * + ************************************************************************/ + +// MARKER(update_precomp.py): autogen include statement, do not remove +#include "precompiled_bridges.hxx" + +#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); +} + +} } } |