From 940b4d1848e8c70ab7642901a68594e8016caffc Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 18:51:28 +0200 Subject: Adding upstream version 1:7.0.4. Signed-off-by: Daniel Baumann --- bridges/source/cpp_uno/shared/vtables.cxx | 146 ++++++++++++++++++++++++++++++ 1 file changed, 146 insertions(+) create mode 100644 bridges/source/cpp_uno/shared/vtables.cxx (limited to 'bridges/source/cpp_uno/shared/vtables.cxx') diff --git a/bridges/source/cpp_uno/shared/vtables.cxx b/bridges/source/cpp_uno/shared/vtables.cxx new file mode 100644 index 000000000..beda5ad29 --- /dev/null +++ b/bridges/source/cpp_uno/shared/vtables.cxx @@ -0,0 +1,146 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + + +#include + +#include +#include + +#include +#include + +namespace +{ + +/** + * Calculates the number of vtables associated with an interface type. + * + *

Multiple-inheritance C++ classes have more than one vtable.

+ * + * @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. + * + *

Local members/functions are those not inherited from any base + * types. The number of functions is potentially larger than the + * number of members, as each read–write attribute member counts + * as two functions.

+ * + * @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) { + 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 = nullptr; + typelib_typedescriptionreference_getDescription( + &desc, member->pBaseRef); + assert( + desc != nullptr && 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::cpp_uno::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 != nullptr; 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: */ -- cgit v1.2.3