blob: b4051f20e8978b1dd1efaa3d683044c6745d6f17 (
plain)
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
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* 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.
*
************************************************************************/
#pragma once
#include <string>
#include <stdexcept>
#if defined _MSC_VER
#pragma warning(push,1)
#endif
#include <objbase.h>
#if defined _MSC_VER
#pragma warning(pop)
#endif
namespace sal
{
namespace systools
{
typedef int HRESULT;
/* Simple exception class for propagating COM errors */
class ComError : public std::runtime_error
{
public:
ComError(const std::string& message, HRESULT hr) :
std::runtime_error(message),
hr_(hr)
{}
HRESULT GetHresult() const
{
return hr_;
}
private:
HRESULT hr_;
};
/* A simple COM smart pointer template */
template <typename T>
class COMReference
{
public:
COMReference() :
com_ptr_(NULL)
{
}
explicit COMReference(T* comptr) :
com_ptr_(comptr)
{
addRef();
}
/* Explicitly controllable whether AddRef will be called or not */
COMReference(T* comptr, bool bAddRef) :
com_ptr_(comptr)
{
if (bAddRef)
addRef();
}
COMReference(const COMReference<T>& other) :
com_ptr_(other.com_ptr_)
{
addRef();
}
COMReference<T>& operator=(const COMReference<T>& other)
{
if (other.com_ptr_)
other.com_ptr_->AddRef();
release();
com_ptr_ = other.com_ptr_;
return *this;
}
COMReference<T>& operator=(T* comptr)
{
release();
com_ptr_ = comptr;
addRef();
return *this;
}
~COMReference()
{
release();
}
template<typename InterfaceType>
COMReference<InterfaceType> QueryInterface(REFIID iid)
{
COMReference<InterfaceType> ip;
HRESULT hr = E_FAIL;
if (com_ptr_)
hr = com_ptr_->QueryInterface(iid, reinterpret_cast<LPVOID*>(&ip));
if (FAILED(hr))
throw ComError("QueryInterface failed: Interface not supported!", hr);
return ip;
}
T* operator->() const
{
return com_ptr_;
}
T& operator*() const
{
return *com_ptr_;
}
/* Necessary for assigning com_ptr_ from functions like
CoCreateInstance which require a 'void**' */
T** operator&()
{
release();
com_ptr_ = NULL;
return &com_ptr_;
}
T* get() const
{
return com_ptr_;
}
COMReference<T>& clear()
{
release();
com_ptr_ = NULL;
return *this;
}
bool is() const
{
return (com_ptr_ != NULL);
}
private:
ULONG addRef()
{
ULONG cnt = 0;
if (com_ptr_)
cnt = com_ptr_->AddRef();
return cnt;
}
ULONG release()
{
ULONG cnt = 0;
if (com_ptr_)
cnt = com_ptr_->Release();
return cnt;
}
private:
T* com_ptr_;
};
} // systools
} // sal
/* Typedefs for some popular COM interfaces */
typedef sal::systools::COMReference<IDataObject> IDataObjectPtr;
typedef sal::systools::COMReference<IStream> IStreamPtr;
typedef sal::systools::COMReference<IEnumFORMATETC> IEnumFORMATETCPtr;
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
