Bug Summary

File:home/maarten/src/libreoffice/core/include/tools/ref.hxx
Warning:line 91, column 38
Use of memory after it is freed

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-unknown-linux-gnu -analyze -disable-free -disable-llvm-verifier -discard-value-names -main-file-name lnkbase2.cxx -analyzer-store=region -analyzer-opt-analyze-nested-blocks -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -mframe-pointer=all -fmath-errno -fno-rounding-math -mconstructor-aliases -munwind-tables -target-cpu x86-64 -fno-split-dwarf-inlining -debugger-tuning=gdb -resource-dir /usr/lib64/clang/11.0.0 -isystem /usr/include/libxml2 -D BOOST_ERROR_CODE_HEADER_ONLY -D BOOST_SYSTEM_NO_DEPRECATED -D CPPU_ENV=gcc3 -D LINUX -D OSL_DEBUG_LEVEL=1 -D SAL_LOG_INFO -D SAL_LOG_WARN -D UNIX -D UNX -D X86_64 -D _PTHREADS -D _REENTRANT -D SFX2_DLLIMPLEMENTATION -D ENABLE_CUPS -D SYSTEM_LIBXML -D EXCEPTIONS_ON -D LIBO_INTERNAL_ONLY -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/liborcus/include -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/liborcus/include -I /home/maarten/src/libreoffice/core/external/boost/include -I /home/maarten/src/libreoffice/core/workdir/UnpackedTarball/boost -I /home/maarten/src/libreoffice/core/sfx2/inc -I /home/maarten/src/libreoffice/core/sfx2/source/inc -I /home/maarten/src/libreoffice/core/workdir/SdiTarget/sfx2/sdi -I /home/maarten/src/libreoffice/core/include -I /usr/lib/jvm/java-11-openjdk-11.0.9.10-0.0.ea.fc33.x86_64/include -I /usr/lib/jvm/java-11-openjdk-11.0.9.10-0.0.ea.fc33.x86_64/include/linux -I /home/maarten/src/libreoffice/core/config_host -I /home/maarten/src/libreoffice/core/workdir/CustomTarget/officecfg/registry -I /home/maarten/src/libreoffice/core/workdir/UnoApiHeadersTarget/udkapi/normal -I /home/maarten/src/libreoffice/core/workdir/UnoApiHeadersTarget/offapi/normal -internal-isystem /usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10 -internal-isystem /usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10/x86_64-redhat-linux -internal-isystem /usr/bin/../lib/gcc/x86_64-redhat-linux/10/../../../../include/c++/10/backward -internal-isystem /usr/local/include -internal-isystem /usr/lib64/clang/11.0.0/include -internal-externc-isystem /include -internal-externc-isystem /usr/include -O0 -Wno-missing-braces -std=c++17 -fdeprecated-macro -fdebug-compilation-dir /home/maarten/src/libreoffice/core -ferror-limit 19 -fvisibility hidden -fvisibility-inlines-hidden -stack-protector 2 -fgnuc-version=4.2.1 -fcxx-exceptions -fexceptions -debug-info-kind=constructor -analyzer-output=html -faddrsig -o /home/maarten/tmp/wis/scan-build-libreoffice/output/report/2020-10-07-141433-9725-1 -x c++ /home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx

/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx

→
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 <memory>
22#include <sfx2/lnkbase.hxx>
23#include <sot/exchange.hxx>
24#include <com/sun/star/uno/Any.hxx>
25#include <com/sun/star/uno/Sequence.hxx>
26#include <com/sun/star/ui/dialogs/TemplateDescription.hpp>
27#include <sfx2/linkmgr.hxx>
28#include <vcl/svapp.hxx>
29#include <vcl/weld.hxx>
30#include <sfx2/strings.hrc>
31#include <sfx2/sfxresid.hxx>
32#include <sfx2/filedlghelper.hxx>
33#include <tools/debug.hxx>
34#include <svl/svdde.hxx>
35#include <osl/diagnose.h>
36
37using namespace ::com::sun::star;
38using namespace ::com::sun::star::uno;
39
40namespace sfx2
41{
42
43namespace {
44
45class ImplDdeItem;
46
47}
48
49struct BaseLink_Impl
50{
51 Link<SvBaseLink&,void> m_aEndEditLink;
52 LinkManager* m_pLinkMgr;
53 weld::Window* m_pParentWin;
54 std::unique_ptr<FileDialogHelper>
55 m_pFileDlg;
56 bool m_bIsConnect;
57
58 BaseLink_Impl() :
59 m_pLinkMgr( nullptr )
60 , m_pParentWin( nullptr )
61 , m_bIsConnect( false )
62 {}
63};
64
65// only for internal management
66struct ImplBaseLinkData
67{
68 struct tClientType
69 {
70 // applies for all links
71 SotClipboardFormatId nCntntType; // Update Format
72 // Not Ole-Links
73 bool bIntrnlLnk; // It is an internal link
74 SfxLinkUpdateMode nUpdateMode; // UpdateMode
75 };
76
77 struct tDDEType
78 {
79 ImplDdeItem* pItem;
80 };
81
82 union {
83 tClientType ClientType;
84 tDDEType DDEType;
85 };
86 ImplBaseLinkData()
87 {
88 ClientType.nCntntType = SotClipboardFormatId::NONE;
89 ClientType.bIntrnlLnk = false;
90 ClientType.nUpdateMode = SfxLinkUpdateMode::NONE;
91 DDEType.pItem = nullptr;
92 }
93};
94
95namespace {
96
97class ImplDdeItem : public DdeGetPutItem
98{
99 SvBaseLink* pLink;
100 DdeData aData;
101 Sequence< sal_Int8 > aSeq; // Datacontainer for DdeData !!!
102 bool bIsValidData : 1;
103 bool bIsInDTOR : 1;
104public:
105#if defined(_WIN32)
106 ImplDdeItem( SvBaseLink& rLink, const OUString& rStr )
107 : DdeGetPutItem( rStr ), pLink( &rLink ), bIsValidData( false ),
108 bIsInDTOR( false )
109 {}
110#endif
111 virtual ~ImplDdeItem() override;
112
113 virtual DdeData* Get( SotClipboardFormatId ) override;
114 virtual bool Put( const DdeData* ) override;
115 virtual void AdviseLoop( bool ) override;
116
117 void Notify()
118 {
119 bIsValidData = false;
120 DdeGetPutItem::NotifyClient();
121 }
122
123 bool IsInDTOR() const { return bIsInDTOR; }
124};
125
126}
127
128SvBaseLink::SvBaseLink()
129 : pImpl ( new BaseLink_Impl ),
130 m_bIsReadOnly(false)
131{
132 mnObjType = SvBaseLinkObjectType::ClientSo;
133 pImplData.reset( new ImplBaseLinkData );
134 bVisible = bSynchron = true;
135 bWasLastEditOK = false;
136}
137
138
139SvBaseLink::SvBaseLink( SfxLinkUpdateMode nUpdateMode, SotClipboardFormatId nContentType )
140 : pImpl( new BaseLink_Impl ),
141 m_bIsReadOnly(false)
142{
143 mnObjType = SvBaseLinkObjectType::ClientSo;
144 pImplData.reset( new ImplBaseLinkData );
145 bVisible = bSynchron = true;
146 bWasLastEditOK = false;
147
148 // It is going to be an OLE-Link,
149 pImplData->ClientType.nUpdateMode = nUpdateMode;
150 pImplData->ClientType.nCntntType = nContentType;
151 pImplData->ClientType.bIntrnlLnk = false;
152}
153
154#if defined(_WIN32)
155
156static DdeTopic* FindTopic( const OUString & rLinkName, sal_uInt16* pItemStt )
157{
158 if( rLinkName.isEmpty() )
159 return nullptr;
160
161 OUString sNm( rLinkName );
162 sal_Int32 nTokenPos = 0;
163 OUString sService( sNm.getToken( 0, cTokenSeparator, nTokenPos ) );
164
165 DdeServices& rSvc = DdeService::GetServices();
166 for (auto const& elem : rSvc)
167 {
168 if(elem->GetName() == sService)
169 {
170 // then we search for the Topic
171 OUString sTopic( sNm.getToken( 0, cTokenSeparator, nTokenPos ) );
172 if( pItemStt )
173 *pItemStt = nTokenPos;
174
175 std::vector<DdeTopic*>& rTopics = elem->GetTopics();
176
177 for (auto const& topic : rTopics)
178 if( topic->GetName() == sTopic )
179 return topic;
180 break;
181 }
182 }
183 return nullptr;
184}
185
186SvBaseLink::SvBaseLink( const OUString& rLinkName, SvBaseLinkObjectType nObjectType, SvLinkSource* pObj )
187 : pImpl()
188 , m_bIsReadOnly(false)
189{
190 bVisible = bSynchron = true;
191 bWasLastEditOK = false;
192 aLinkName = rLinkName;
193 pImplData.reset( new ImplBaseLinkData );
194 mnObjType = nObjectType;
195
196 if( !pObj )
197 {
198 DBG_ASSERT( pObj, "Where is my left-most object" )do { if (true && (!(pObj))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.tools"), ("/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx"
":" "198" ": "), "%s", "Where is my left-most object"); } } while
(false);
199 return;
200 }
201
202 if( SvBaseLinkObjectType::DdeExternal == mnObjType )
203 {
204 sal_uInt16 nItemStt = 0;
205 DdeTopic* pTopic = FindTopic( aLinkName, &nItemStt );
206 if( pTopic )
207 {
208 // then we have it all together
209 // MM_TODO how do I get the name
210 OUString aStr = aLinkName; // xLinkName->GetDisplayName();
211 aStr = aStr.copy( nItemStt );
212 pImplData->DDEType.pItem = new ImplDdeItem( *this, aStr );
213 pTopic->InsertItem( pImplData->DDEType.pItem );
214
215 // store the Advice
216 xObj = pObj;
217 }
218 }
219 else if( pObj->Connect( this ) )
220 xObj = pObj;
221}
222
223#endif
224
225SvBaseLink::~SvBaseLink()
226{
227 Disconnect();
228
229 if( mnObjType == SvBaseLinkObjectType::DdeExternal )
230 {
231 if( !pImplData->DDEType.pItem->IsInDTOR() )
232 delete pImplData->DDEType.pItem;
233 }
234
235 pImplData.reset();
236}
237
238IMPL_LINK( SvBaseLink, EndEditHdl, const OUString&, _rNewName, void )void SvBaseLink::LinkStubEndEditHdl(void * instance, const OUString
& data) { return static_cast<SvBaseLink *>(instance
)->EndEditHdl(data); } void SvBaseLink::EndEditHdl(const OUString
& _rNewName)
239{
240 OUString sNewName = _rNewName;
241 if ( !ExecuteEdit( sNewName ) )
242 sNewName.clear();
243 bWasLastEditOK = !sNewName.isEmpty();
244 pImpl->m_aEndEditLink.Call( *this );
245}
246
247
248void SvBaseLink::SetObjType( SvBaseLinkObjectType mnObjTypeP )
249{
250 DBG_ASSERT( mnObjType != SvBaseLinkObjectType::ClientDde, "type already set" )do { if (true && (!(mnObjType != SvBaseLinkObjectType
::ClientDde))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.tools"), ("/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx"
":" "250" ": "), "%s", "type already set"); } } while (false
);
251 DBG_ASSERT( !xObj.is(), "object exist" )do { if (true && (!(!xObj.is()))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.tools"), ("/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx"
":" "251" ": "), "%s", "object exist"); } } while (false);
252
253 mnObjType = mnObjTypeP;
254}
255
256
257void SvBaseLink::SetName( const OUString & rNm )
258{
259 aLinkName = rNm;
260}
261
262
263void SvBaseLink::SetObj( SvLinkSource * pObj )
264{
265 DBG_ASSERT( (isClientType(mnObjType) &&do { if (true && (!((isClientType(mnObjType) &&
pImplData->ClientType.bIntrnlLnk) || mnObjType == SvBaseLinkObjectType
::ClientGraphic))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.tools"), ("/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx"
":" "268" ": "), "%s", "no intern link"); } } while (false)
266 pImplData->ClientType.bIntrnlLnk) ||do { if (true && (!((isClientType(mnObjType) &&
pImplData->ClientType.bIntrnlLnk) || mnObjType == SvBaseLinkObjectType
::ClientGraphic))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.tools"), ("/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx"
":" "268" ": "), "%s", "no intern link"); } } while (false)
267 mnObjType == SvBaseLinkObjectType::ClientGraphic,do { if (true && (!((isClientType(mnObjType) &&
pImplData->ClientType.bIntrnlLnk) || mnObjType == SvBaseLinkObjectType
::ClientGraphic))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.tools"), ("/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx"
":" "268" ": "), "%s", "no intern link"); } } while (false)
268 "no intern link" )do { if (true && (!((isClientType(mnObjType) &&
pImplData->ClientType.bIntrnlLnk) || mnObjType == SvBaseLinkObjectType
::ClientGraphic))) { sal_detail_logFormat((SAL_DETAIL_LOG_LEVEL_WARN
), ("legacy.tools"), ("/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx"
":" "268" ": "), "%s", "no intern link"); } } while (false);
269 xObj = pObj;
270}
271
272
273void SvBaseLink::SetLinkSourceName( const OUString & rLnkNm )
274{
275 if( aLinkName == rLnkNm )
276 return;
277
278 AddNextRef(); // should be superfluous
279 // remove old connection
280 Disconnect();
281
282 aLinkName = rLnkNm;
283
284 // New Connection
285 GetRealObject_();
286 ReleaseRef(); // should be superfluous
287}
288
289
290void SvBaseLink::SetUpdateMode( SfxLinkUpdateMode nMode )
291{
292 if( isClientType(mnObjType) &&
293 pImplData->ClientType.nUpdateMode != nMode )
294 {
295 AddNextRef();
296 Disconnect();
297
298 pImplData->ClientType.nUpdateMode = nMode;
299 GetRealObject_();
300 ReleaseRef();
301 }
302}
303
304// #i88291#
305void SvBaseLink::clearStreamToLoadFrom()
306{
307 m_xInputStreamToLoadFrom.clear();
308 if( xObj.is() )
309 {
310 xObj->clearStreamToLoadFrom();
311 }
312}
313
314bool SvBaseLink::Update()
315{
316 if( isClientType(mnObjType) )
11
←
Taking true branch
→
317 {
318 AddNextRef();
319 Disconnect();
320
321 GetRealObject_();
322 ReleaseRef();
12
←
Calling 'SvRefBase::ReleaseRef'
→
18
←
Returning; memory was released
→
323 if( xObj.is() )
19
←
Calling 'SvRef::is'
→
324 {
325 xObj->setStreamToLoadFrom(m_xInputStreamToLoadFrom,m_bIsReadOnly);
326 OUString sMimeType( SotExchange::GetFormatMimeType(
327 pImplData->ClientType.nCntntType ));
328 Any aData;
329
330 if( xObj->GetData( aData, sMimeType ) )
331 {
332 UpdateResult eRes = DataChanged(sMimeType, aData);
333 bool bSuccess = eRes == SUCCESS;
334 //for manual Updates there is no need to hold the ServerObject
335 if( SvBaseLinkObjectType::ClientDde == mnObjType &&
336 SfxLinkUpdateMode::ONCALL == GetUpdateMode() && xObj.is() )
337 xObj->RemoveAllDataAdvise( this );
338 return bSuccess;
339 }
340 if( xObj.is() )
341 {
342 // should be asynchronous?
343 if( xObj->IsPending() )
344 return true;
345
346 // we do not need the object anymore
347 AddNextRef();
348 Disconnect();
349 ReleaseRef();
350 }
351 }
352 }
353 return false;
354}
355
356
357SfxLinkUpdateMode SvBaseLink::GetUpdateMode() const
358{
359 return isClientType(mnObjType)
360 ? pImplData->ClientType.nUpdateMode
361 : SfxLinkUpdateMode::ONCALL;
362}
363
364
365void SvBaseLink::GetRealObject_( bool bConnect)
366{
367 if( !pImpl->m_pLinkMgr )
368 return;
369
370 DBG_ASSERT( !xObj.is(), "object already exist" )do { if (true && (!(!xObj.is()))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.tools"), ("/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx"
":" "370" ": "), "%s", "object already exist"); } } while (false
);
371
372 if( SvBaseLinkObjectType::ClientDde == mnObjType )
373 {
374 OUString sServer;
375 if( sfx2::LinkManager::GetDisplayNames( this, &sServer ) &&
376 sServer == Application::GetAppName() ) // internal Link !!!
377 {
378 // so that the Internal link can be created!
379 mnObjType = SvBaseLinkObjectType::Internal;
380 xObj = sfx2::LinkManager::CreateObj( this );
381
382 pImplData->ClientType.bIntrnlLnk = true;
383 mnObjType = SvBaseLinkObjectType::ClientDde; // so we know what it once was!
384 }
385 else
386 {
387 pImplData->ClientType.bIntrnlLnk = false;
388 xObj = sfx2::LinkManager::CreateObj( this );
389 }
390 }
391 else if( isClientType(mnObjType) )
392 xObj = sfx2::LinkManager::CreateObj( this );
393
394 if( bConnect && ( !xObj.is() || !xObj->Connect( this ) ) )
395 Disconnect();
396}
397
398SotClipboardFormatId SvBaseLink::GetContentType() const
399{
400 if( isClientType(mnObjType) )
401 return pImplData->ClientType.nCntntType;
402
403 return SotClipboardFormatId::NONE; // all Formats ?
404}
405
406
407void SvBaseLink::SetContentType( SotClipboardFormatId nType )
408{
409 if( isClientType(mnObjType) )
410 {
411 pImplData->ClientType.nCntntType = nType;
412 }
413}
414
415LinkManager* SvBaseLink::GetLinkManager()
416{
417 return pImpl->m_pLinkMgr;
418}
419
420const LinkManager* SvBaseLink::GetLinkManager() const
421{
422 return pImpl->m_pLinkMgr;
423}
424
425void SvBaseLink::SetLinkManager( LinkManager* _pMgr )
426{
427 pImpl->m_pLinkMgr = _pMgr;
428}
429
430void SvBaseLink::Disconnect()
431{
432 if( xObj.is() )
433 {
434 xObj->RemoveAllDataAdvise( this );
435 xObj->RemoveConnectAdvise( this );
436 xObj.clear();
437 }
438}
439
440SvBaseLink::UpdateResult SvBaseLink::DataChanged( const OUString &, const css::uno::Any & )
441{
442 if ( mnObjType == SvBaseLinkObjectType::DdeExternal )
443 {
444 if( pImplData->DDEType.pItem )
445 pImplData->DDEType.pItem->Notify();
446 }
447 return SUCCESS;
448}
449
450void SvBaseLink::Edit(weld::Window* pParent, const Link<SvBaseLink&,void>& rEndEditHdl )
451{
452 pImpl->m_pParentWin = pParent;
453 pImpl->m_aEndEditLink = rEndEditHdl;
454 pImpl->m_bIsConnect = xObj.is();
455 if( !pImpl->m_bIsConnect
0.1
Field 'm_bIsConnect' is true
0.1
Field 'm_bIsConnect' is true
 )
1
Taking false branch
→
456 GetRealObject_( xObj.is() );
457
458 bool bAsync = false;
459 Link<const OUString&, void> aLink = LINK( this, SvBaseLink, EndEditHdl )::tools::detail::makeLink( ::tools::detail::castTo<SvBaseLink
*>(this), &SvBaseLink::LinkStubEndEditHdl);
460
461 if( isClientType(mnObjType) && pImplData->ClientType.bIntrnlLnk )
2
←
Assuming the condition is true
→
3
←
Assuming field 'bIntrnlLnk' is true
→
4
←
Taking true branch
→
462 {
463 if( pImpl->m_pLinkMgr )
5
←
Assuming field 'm_pLinkMgr' is null
→
6
←
Taking false branch
→
464 {
465 SvLinkSourceRef ref = sfx2::LinkManager::CreateObj( this );
466 if( ref.is() )
467 {
468 ref->Edit( pParent, this, aLink );
469 bAsync = true;
470 }
471 }
472 }
473 else
474 {
475 xObj->Edit( pParent, this, aLink );
476 bAsync = true;
477 }
478
479 if ( !bAsync
6.1
'bAsync' is false
6.1
'bAsync' is false
 )
7
←
Taking true branch
→
480 {
481 ExecuteEdit( OUString() );
8
←
Calling 'SvBaseLink::ExecuteEdit'
→
482 bWasLastEditOK = false;
483 pImpl->m_aEndEditLink.Call( *this );
484 }
485}
486
487bool SvBaseLink::ExecuteEdit( const OUString& _rNewName )
488{
489 if( !_rNewName.isEmpty() )
9
←
Taking true branch
→
490 {
491 SetLinkSourceName( _rNewName );
492 if( !Update() )
10
←
Calling 'SvBaseLink::Update'
→
493 {
494 OUString sApp, sTopic, sItem, sError;
495 sfx2::LinkManager::GetDisplayNames( this, &sApp, &sTopic, &sItem );
496 if( mnObjType == SvBaseLinkObjectType::ClientDde )
497 {
498 sError = SfxResId(STR_DDE_ERRORreinterpret_cast<char const *>("STR_DDE_ERROR" "\004" u8"DDE link to %1 for %2 area %3 are not available."
));
499
500 sal_Int32 nFndPos = sError.indexOf( "%1" );
501 if( -1 != nFndPos )
502 {
503 sError = sError.replaceAt( nFndPos, 2, sApp );
504 nFndPos = nFndPos + sApp.getLength();
505
506 if( -1 != ( nFndPos = sError.indexOf( "%2", nFndPos )))
507 {
508 sError = sError.replaceAt( nFndPos, 2, sTopic );
509 nFndPos = nFndPos + sTopic.getLength();
510
511 if( -1 != ( nFndPos = sError.indexOf( "%3", nFndPos )))
512 sError = sError.replaceAt( nFndPos, 2, sItem );
513 }
514 }
515 }
516 else
517 return false;
518
519 std::unique_ptr<weld::MessageDialog> xBox(Application::CreateMessageDialog(pImpl->m_pParentWin,
520 VclMessageType::Warning, VclButtonsType::Ok, sError));
521 xBox->run();
522 }
523 }
524 else if( !pImpl->m_bIsConnect )
525 Disconnect();
526 pImpl->m_bIsConnect = false;
527 return true;
528}
529
530void SvBaseLink::Closed()
531{
532 if( xObj.is() )
533 xObj->RemoveAllDataAdvise( this );
534}
535
536FileDialogHelper & SvBaseLink::GetInsertFileDialog(const OUString& rFactory) const
537{
538 pImpl->m_pFileDlg.reset( new FileDialogHelper(
539 ui::dialogs::TemplateDescription::FILEOPEN_SIMPLE,
540 FileDialogFlags::Insert, rFactory, SfxFilterFlags::NONE, SfxFilterFlags::NONE, pImpl->m_pParentWin) );
541 return *pImpl->m_pFileDlg;
542}
543
544ImplDdeItem::~ImplDdeItem()
545{
546 bIsInDTOR = true;
547 // So that no-one gets the idea to delete the pointer when Disconnecting!
548 tools::SvRef<SvBaseLink> aRef( pLink );
549 aRef->Disconnect();
550}
551
552DdeData* ImplDdeItem::Get( SotClipboardFormatId nFormat )
553{
554 if( pLink->GetObj() )
555 {
556 // is it still valid?
557 if( bIsValidData && nFormat == aData.GetFormat() )
558 return &aData;
559
560 Any aValue;
561 OUString sMimeType( SotExchange::GetFormatMimeType( nFormat ));
562 if( pLink->GetObj()->GetData( aValue, sMimeType ) )
563 {
564 if( aValue >>= aSeq )
565 {
566 aData = DdeData( aSeq.getConstArray(), aSeq.getLength(), nFormat );
567
568 bIsValidData = true;
569 return &aData;
570 }
571 }
572 }
573 aSeq.realloc( 0 );
574 bIsValidData = false;
575 return nullptr;
576}
577
578
579bool ImplDdeItem::Put( const DdeData* )
580{
581 OSL_FAIL( "ImplDdeItem::Put not implemented" )do { if (true && (((sal_Bool)1))) { sal_detail_logFormat
((SAL_DETAIL_LOG_LEVEL_WARN), ("legacy.osl"), ("/home/maarten/src/libreoffice/core/sfx2/source/appl/lnkbase2.cxx"
":" "581" ": "), "%s", "ImplDdeItem::Put not implemented"); }
} while (false);
582 return false;
583}
584
585
586void ImplDdeItem::AdviseLoop( bool bOpen )
587{
588 // Connection is closed, so also unsubscribe link
589 if( !pLink->GetObj() )
590 return;
591
592 if( bOpen )
593 {
594 // A connection is re-established
595 if( SvBaseLinkObjectType::DdeExternal == pLink->GetObjType() )
596 {
597 pLink->GetObj()->AddDataAdvise( pLink, "text/plain;charset=utf-16", ADVISEMODE_NODATA0x01 );
598 pLink->GetObj()->AddConnectAdvise( pLink );
599 }
600 }
601 else
602 {
603 // So that no-one gets the idea to delete the pointer
604 // when Disconnecting!
605 tools::SvRef<SvBaseLink> aRef( pLink );
606 aRef->Disconnect();
607 }
608}
609
610}
611
612/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
←

/home/maarten/src/libreoffice/core/include/tools/ref.hxx

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#ifndef INCLUDED_TOOLS_REF_HXX
20#define INCLUDED_TOOLS_REF_HXX
21
22#include <sal/config.h>
23#include <cassert>
24#include <tools/toolsdllapi.h>
25#include <utility>
26
27/**
28 This implements similar functionality to boost::intrusive_ptr
29*/
30
31namespace tools {
32
33/** T must be a class that extends SvRefBase */
34template<typename T> class SAL_DLLPUBLIC_RTTI__attribute__ ((type_visibility("default"))) SvRef final {
35public:
36 SvRef(): pObj(nullptr) {}
37
38 SvRef(SvRef&& rObj) noexcept
39 {
40 pObj = rObj.pObj;
41 rObj.pObj = nullptr;
42 }
43
44 SvRef(SvRef const & rObj): pObj(rObj.pObj)
45 {
46 if (pObj != nullptr) pObj->AddNextRef();
47 }
48
49 SvRef(T * pObjP): pObj(pObjP)
50 {
51 if (pObj != nullptr) pObj->AddFirstRef();
52 }
53
54 ~SvRef()
55 {
56 if (pObj != nullptr) pObj->ReleaseRef();
57 }
58
59 void clear()
60 {
61 if (pObj != nullptr) {
62 T * pRefObj = pObj;
63 pObj = nullptr;
64 pRefObj->ReleaseRef();
65 }
66 }
67
68 SvRef & operator =(SvRef const & rObj)
69 {
70 if (rObj.pObj != nullptr) {
71 rObj.pObj->AddNextRef();
72 }
73 T * pRefObj = pObj;
74 pObj = rObj.pObj;
75 if (pRefObj != nullptr) {
76 pRefObj->ReleaseRef();
77 }
78 return *this;
79 }
80
81 SvRef & operator =(SvRef && rObj)
82 {
83 if (pObj != nullptr) {
84 pObj->ReleaseRef();
85 }
86 pObj = rObj.pObj;
87 rObj.pObj = nullptr;
88 return *this;
89 }
90
91 bool is() const { return pObj != nullptr; }
20
←
Use of memory after it is freed
92
93 explicit operator bool() const { return is(); }
94
95 T * get() const { return pObj; }
96
97 T * operator ->() const { assert(pObj != nullptr)(static_cast <bool> (pObj != nullptr) ? void (0) : __assert_fail
("pObj != nullptr", "/home/maarten/src/libreoffice/core/include/tools/ref.hxx"
, 97, __extension__ __PRETTY_FUNCTION__)); return pObj; }
98
99 T & operator *() const { assert(pObj != nullptr)(static_cast <bool> (pObj != nullptr) ? void (0) : __assert_fail
("pObj != nullptr", "/home/maarten/src/libreoffice/core/include/tools/ref.hxx"
, 99, __extension__ __PRETTY_FUNCTION__)); return *pObj; }
100
101 bool operator ==(const SvRef<T> &rhs) const { return pObj == rhs.pObj; }
102 bool operator !=(const SvRef<T> &rhs) const { return !(*this == rhs); }
103
104private:
105 T * pObj;
106};
107
108/**
109 * This implements similar functionality to std::make_shared.
110 */
111template<typename T, typename... Args>
112SvRef<T> make_ref(Args&& ... args)
113{
114 return SvRef<T>(new T(std::forward<Args>(args)...));
115}
116
117}
118
119/** Classes that want to be referenced-counted via SvRef<T>, should extend this base class */
120class TOOLS_DLLPUBLIC__attribute__ ((visibility("default"))) SvRefBase
121{
122 // work around a clang 3.5 optimization bug: if the bNoDelete is *first*
123 // it mis-compiles "if (--nRefCount == 0)" and never deletes any object
124 unsigned int nRefCount : 31;
125 // the only reason this is not bool is because MSVC cannot handle mixed type bitfields
126 unsigned int bNoDelete : 1;
127
128protected:
129 virtual ~SvRefBase() COVERITY_NOEXCEPT_FALSE;
130
131public:
132 SvRefBase() : nRefCount(0), bNoDelete(1) {}
133 SvRefBase(const SvRefBase &) : nRefCount(0), bNoDelete(1) {}
134
135 SvRefBase & operator=(const SvRefBase &) { return *this; }
136
137 void RestoreNoDelete()
138 { bNoDelete = 1; }
139
140 void AddNextRef()
141 {
142 assert( nRefCount < (1 << 30) && "Do not add refs to dead objects" )(static_cast <bool> (nRefCount < (1 << 30) &&
"Do not add refs to dead objects") ? void (0) : __assert_fail
("nRefCount < (1 << 30) && \"Do not add refs to dead objects\""
, "/home/maarten/src/libreoffice/core/include/tools/ref.hxx",
142, __extension__ __PRETTY_FUNCTION__));
143 ++nRefCount;
144 }
145
146 void AddFirstRef()
147 {
148 assert( nRefCount < (1 << 30) && "Do not add refs to dead objects" )(static_cast <bool> (nRefCount < (1 << 30) &&
"Do not add refs to dead objects") ? void (0) : __assert_fail
("nRefCount < (1 << 30) && \"Do not add refs to dead objects\""
, "/home/maarten/src/libreoffice/core/include/tools/ref.hxx",
148, __extension__ __PRETTY_FUNCTION__));
149 if( bNoDelete )
150 bNoDelete = 0;
151 ++nRefCount;
152 }
153
154 void ReleaseRef()
155 {
156 assert( nRefCount >= 1)(static_cast <bool> (nRefCount >= 1) ? void (0) : __assert_fail
("nRefCount >= 1", "/home/maarten/src/libreoffice/core/include/tools/ref.hxx"
, 156, __extension__ __PRETTY_FUNCTION__));
13
←
'?' condition is true
→
157 if( --nRefCount == 0 && !bNoDelete)
14
←
Assuming the condition is true
→
15
←
Assuming field 'bNoDelete' is 0
→
16
←
Taking true branch
→
158 {
159 // I'm not sure about the original purpose of this line, but right now
160 // it serves the purpose that anything that attempts to do an AddRef()
161 // after an object is deleted will trip an assert.
162 nRefCount = 1 << 30;
163 delete this;
17
←
Memory is released
→
164 }
165 }
166
167 unsigned int GetRefCount() const
168 { return nRefCount; }
169};
170
171template<typename T>
172class SvCompatWeakBase;
173
174/** SvCompatWeakHdl acts as an intermediary between SvCompatWeakRef<T> and T.
175*/
176template<typename T>
177class SvCompatWeakHdl final : public SvRefBase
178{
179 friend class SvCompatWeakBase<T>;
180 T* _pObj;
181
182 SvCompatWeakHdl( T* pObj ) : _pObj( pObj ) {}
183
184public:
185 void ResetWeakBase( ) { _pObj = nullptr; }
186 T* GetObj() { return _pObj; }
187};
188
189/** We only have one place that extends this, in include/sfx2/frame.hxx, class SfxFrame.
190 Its function is to notify the SvCompatWeakHdl when an SfxFrame object is deleted.
191*/
192template<typename T>
193class SvCompatWeakBase
194{
195 tools::SvRef< SvCompatWeakHdl<T> > _xHdl;
196
197public:
198 /** Does not use initializer due to compiler warnings,
199 because the lifetime of the _xHdl object can exceed the lifetime of this class.
200 */
201 SvCompatWeakBase( T* pObj ) { _xHdl = new SvCompatWeakHdl<T>( pObj ); }
202
203 ~SvCompatWeakBase() { _xHdl->ResetWeakBase(); }
204
205 SvCompatWeakHdl<T>* GetHdl() { return _xHdl.get(); }
206};
207
208/** We only have one weak reference in LO, in include/sfx2/frame.hxx, class SfxFrameWeak.
209*/
210template<typename T>
211class SAL_WARN_UNUSED__attribute__((warn_unused)) SvCompatWeakRef
212{
213 tools::SvRef< SvCompatWeakHdl<T> > _xHdl;
214public:
215 SvCompatWeakRef( ) {}
216 SvCompatWeakRef( T* pObj )
217 { if( pObj ) _xHdl = pObj->GetHdl(); }
218#if defined(__COVERITY__)
219 ~SvCompatWeakRef() COVERITY_NOEXCEPT_FALSE {}
220#endif
221 SvCompatWeakRef& operator = ( T * pObj )
222 { _xHdl = pObj ? pObj->GetHdl() : nullptr; return *this; }
223 bool is() const
224 { return _xHdl.is() && _xHdl->GetObj(); }
225 explicit operator bool() const { return is(); }
226 T* operator -> () const
227 { return _xHdl.is() ? _xHdl->GetObj() : nullptr; }
228 operator T* () const
229 { return _xHdl.is() ? _xHdl->GetObj() : nullptr; }
230};
231
232#endif
233
234/* vim:set shiftwidth=4 softtabstop=4 expandtab: */