1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
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 <vtables.hxx>
#include <sal/types.h>
#include <typelib/typedescription.h>
#include <algorithm>
#include <cassert>
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 != nullptr) {
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: */
|
