Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : 
      21             : #include "bridges/cpp_uno/shared/vtables.hxx"
      22             : 
      23             : #include "sal/types.h"
      24             : #include "typelib/typedescription.h"
      25             : 
      26             : #include <algorithm>
      27             : #include <cassert>
      28             : 
      29             : namespace
      30             : {
      31             : 
      32             : /**
      33             :  *  Calculates the number of vtables associated with an interface type.
      34             :  *
      35             :  * <p>Multiple-inheritance C++ classes have more than one vtable.</p>
      36             :  *
      37             :  * @param type a non-null pointer to an interface type description
      38             :  * @return the number of vtables associated with the given interface type
      39             :  */
      40        3256 : sal_Int32 getVtableCount(typelib_InterfaceTypeDescription const * type) {
      41        3256 :     sal_Int32 n = 0;
      42        5140 :     for (sal_Int32 i = 0; i < type->nBaseTypes; ++i) {
      43        1884 :         n += getVtableCount(type->ppBaseTypes[i]);
      44             :     }
      45        3256 :     return std::max< sal_Int32 >(n, 1);
      46             : }
      47             : 
      48             : /**
      49             :  * Maps a local member index to a local function index.
      50             :  *
      51             :  * <p><em>Local</em> members/functions are those not inherited from any base
      52             :  * types.  The number of <em>functions</em> is potentially larger than the
      53             :  * number of <em>members</em>, as each read&ndash;write attribute member counts
      54             :  * as two functions.</p>
      55             :  *
      56             :  * @param type a non-null pointer to an interface type description
      57             :  * @param localMember a local member index, relative to the given interface type
      58             :  * @return the local function index corresponding to the given local member
      59             :  *     index, relative to the given interface type
      60             :  */
      61      571465 : sal_Int32 mapLocalMemberToLocalFunction(
      62             :     typelib_InterfaceTypeDescription * type, sal_Int32 localMember)
      63             : {
      64             :     typelib_typedescription_complete(
      65      571465 :         reinterpret_cast< typelib_TypeDescription ** >(&type));
      66      571465 :     sal_Int32 localMemberOffset = type->nAllMembers - type->nMembers;
      67             :     sal_Int32 localFunctionOffset = type->nMapFunctionIndexToMemberIndex
      68      571465 :         - bridges::cpp_uno::shared::getLocalFunctions(type);
      69      571465 :     return type->pMapMemberIndexToFunctionIndex[localMemberOffset + localMember]
      70      571465 :         - localFunctionOffset;
      71             : }
      72             : 
      73             : // Since on Solaris we compile with --instances=static, getVtableSlot cannot be
      74             : // a template function, with explicit instantiates for
      75             : // T = typelib_InterfaceAttributeTypeDescription and
      76             : // T = typelib_InterfaceMethodTypeDescription in this file; hence, there are two
      77             : // overloaded versions of getVtableSlot that both delegate to this template
      78             : // function:
      79      571464 : template< typename T > bridges::cpp_uno::shared::VtableSlot doGetVtableSlot(
      80             :     T const * ifcMember)
      81             : {
      82             :     bridges::cpp_uno::shared::VtableSlot slot;
      83      571464 :     slot.offset = 0;
      84      571464 :     T * member = const_cast< T * >(ifcMember);
      85     1287632 :     while (member->pBaseRef != 0) {
      86             :         assert(member->nIndex < member->pInterface->nBaseTypes);
      87      146076 :         for (sal_Int32 i = 0; i < member->nIndex; ++i) {
      88        1372 :             slot.offset += getVtableCount(member->pInterface->ppBaseTypes[i]);
      89             :         }
      90      144704 :         typelib_TypeDescription * desc = 0;
      91      144704 :         typelib_typedescriptionreference_getDescription(
      92      144704 :             &desc, member->pBaseRef);
      93             :         assert(
      94             :             desc != 0 && desc->eTypeClass == member->aBase.aBase.eTypeClass);
      95      144704 :         if (member != ifcMember) {
      96       22055 :             typelib_typedescription_release(&member->aBase.aBase);
      97             :         }
      98      144704 :         member = reinterpret_cast< T * >(desc);
      99             :     }
     100      571465 :     slot.index
     101             :         = bridges::cpp_uno::shared::getPrimaryFunctions(
     102      571464 :             member->pInterface->pBaseTypeDescription)
     103      571466 :         + mapLocalMemberToLocalFunction(member->pInterface, member->nIndex);
     104      571465 :     if (member != ifcMember) {
     105      122649 :         typelib_typedescription_release(&member->aBase.aBase);
     106             :     }
     107      571466 :     return slot;
     108             : }
     109             : 
     110             : }
     111             : 
     112             : namespace bridges { namespace cpp_uno { namespace shared {
     113             : 
     114     1086350 : sal_Int32 getLocalFunctions(typelib_InterfaceTypeDescription const * type) {
     115     1086350 :     return type->nMembers == 0
     116             :         ? 0
     117             :         : (type->nMapFunctionIndexToMemberIndex
     118     1085921 :            - type->pMapMemberIndexToFunctionIndex[
     119     2172271 :                type->nAllMembers - type->nMembers]);
     120             : }
     121             : 
     122      572140 : sal_Int32 getPrimaryFunctions(typelib_InterfaceTypeDescription * type) {
     123      572140 :     sal_Int32 n = 0;
     124     1084074 :     for (; type != 0; type = type->pBaseTypeDescription) {
     125             :         typelib_typedescription_complete(
     126      511932 :             reinterpret_cast< typelib_TypeDescription ** >(&type));
     127      511933 :         n += getLocalFunctions(type);
     128             :     }
     129      572142 :     return n;
     130             : }
     131             : 
     132        8622 : VtableSlot getVtableSlot(
     133             :     typelib_InterfaceAttributeTypeDescription const * ifcMember)
     134             : {
     135        8622 :     return doGetVtableSlot(ifcMember);
     136             : }
     137             : 
     138      562842 : VtableSlot getVtableSlot(
     139             :     typelib_InterfaceMethodTypeDescription const * ifcMember)
     140             : {
     141      562842 :     return doGetVtableSlot(ifcMember);
     142             : }
     143             : 
     144             : } } }
     145             : 
     146             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */