1 /************************************************************** 2 * 3 * Licensed to the Apache Software Foundation (ASF) under one 4 * or more contributor license agreements. See the NOTICE file 5 * distributed with this work for additional information 6 * regarding copyright ownership. The ASF licenses this file 7 * to you under the Apache License, Version 2.0 (the 8 * "License"); you may not use this file except in compliance 9 * with the License. You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, 14 * software distributed under the License is distributed on an 15 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 16 * KIND, either express or implied. See the License for the 17 * specific language governing permissions and limitations 18 * under the License. 19 * 20 *************************************************************/ 21 22 23 24 // MARKER(update_precomp.py): autogen include statement, do not remove 25 #include "precompiled_bridges.hxx" 26 27 #include "bridges/cpp_uno/shared/vtables.hxx" 28 29 #include "osl/diagnose.h" 30 #include "sal/types.h" 31 #include "typelib/typedescription.h" 32 33 #include <algorithm> 34 35 namespace 36 { 37 38 /** 39 * Calculates the number of vtables associated with an interface type. 40 * 41 * <p>Multiple-inheritance C++ classes have more than one vtable.</p> 42 * 43 * @param type a non-null pointer to an interface type description 44 * @return the number of vtables associated with the given interface type 45 */ 46 sal_Int32 getVtableCount(typelib_InterfaceTypeDescription const * type) { 47 sal_Int32 n = 0; 48 for (sal_Int32 i = 0; i < type->nBaseTypes; ++i) { 49 n += getVtableCount(type->ppBaseTypes[i]); 50 } 51 return std::max< sal_Int32 >(n, 1); 52 } 53 54 /** 55 * Maps a local member index to a local function index. 56 * 57 * <p><em>Local</em> members/functions are those not inherited from any base 58 * types. The number of <em>functions</em> is potentially larger than the 59 * number of <em>members</em>, as each read–write attribute member counts 60 * as two functions.</p> 61 * 62 * @param type a non-null pointer to an interface type description 63 * @param localMember a local member index, relative to the given interface type 64 * @return the local function index corresponding to the given local member 65 * index, relative to the given interface type 66 */ 67 sal_Int32 mapLocalMemberToLocalFunction( 68 typelib_InterfaceTypeDescription * type, sal_Int32 localMember) 69 { 70 typelib_typedescription_complete( 71 reinterpret_cast< typelib_TypeDescription ** >(&type)); 72 sal_Int32 localMemberOffset = type->nAllMembers - type->nMembers; 73 sal_Int32 localFunctionOffset = type->nMapFunctionIndexToMemberIndex 74 - bridges::cpp_uno::shared::getLocalFunctions(type); 75 return type->pMapMemberIndexToFunctionIndex[localMemberOffset + localMember] 76 - localFunctionOffset; 77 } 78 79 // Since on Solaris we compile with --instances=static, getVtableSlot cannot be 80 // a template function, with explicit instantiates for 81 // T = typelib_InterfaceAttributeTypeDescription and 82 // T = typelib_InterfaceMethodTypeDescription in this file; hence, there are two 83 // overloaded versions of getVtableSlot that both delegate to this template 84 // function: 85 template< typename T > bridges::cpp_uno::shared::VtableSlot doGetVtableSlot( 86 T const * ifcMember) 87 { 88 bridges::cpp_uno::shared::VtableSlot slot; 89 slot.offset = 0; 90 T * member = const_cast< T * >(ifcMember); 91 while (member->pBaseRef != 0) { 92 OSL_ASSERT(member->nIndex < member->pInterface->nBaseTypes); 93 for (sal_Int32 i = 0; i < member->nIndex; ++i) { 94 slot.offset += getVtableCount(member->pInterface->ppBaseTypes[i]); 95 } 96 typelib_TypeDescription * desc = 0; 97 typelib_typedescriptionreference_getDescription( 98 &desc, member->pBaseRef); 99 OSL_ASSERT( 100 desc != 0 && desc->eTypeClass == member->aBase.aBase.eTypeClass); 101 if (member != ifcMember) { 102 typelib_typedescription_release(&member->aBase.aBase); 103 } 104 member = reinterpret_cast< T * >(desc); 105 } 106 slot.index 107 = bridges::cpp_uno::shared::getPrimaryFunctions( 108 member->pInterface->pBaseTypeDescription) 109 + mapLocalMemberToLocalFunction(member->pInterface, member->nIndex); 110 if (member != ifcMember) { 111 typelib_typedescription_release(&member->aBase.aBase); 112 } 113 return slot; 114 } 115 116 } 117 118 namespace bridges { namespace cpp_uno { namespace shared { 119 120 sal_Int32 getLocalFunctions(typelib_InterfaceTypeDescription const * type) { 121 return type->nMembers == 0 122 ? 0 123 : (type->nMapFunctionIndexToMemberIndex 124 - type->pMapMemberIndexToFunctionIndex[ 125 type->nAllMembers - type->nMembers]); 126 } 127 128 sal_Int32 getPrimaryFunctions(typelib_InterfaceTypeDescription * type) { 129 sal_Int32 n = 0; 130 for (; type != 0; type = type->pBaseTypeDescription) { 131 typelib_typedescription_complete( 132 reinterpret_cast< typelib_TypeDescription ** >(&type)); 133 n += getLocalFunctions(type); 134 } 135 return n; 136 } 137 138 VtableSlot getVtableSlot( 139 typelib_InterfaceAttributeTypeDescription const * ifcMember) 140 { 141 return doGetVtableSlot(ifcMember); 142 } 143 144 VtableSlot getVtableSlot( 145 typelib_InterfaceMethodTypeDescription const * ifcMember) 146 { 147 return doGetVtableSlot(ifcMember); 148 } 149 150 } } } 151