LCOV - code coverage report
Current view: top level - cppuhelper/source - implbase_ex.cxx (source / functions) Hit Total Coverage
Test: commit e02a6cb2c3e2b23b203b422e4e0680877f232636 Lines: 73 161 45.3 %
Date: 2014-04-14 Functions: 10 21 47.6 %
Legend: Lines: hit not hit

          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             : #include <sal/alloca.h>
      21             : 
      22             : #include <string.h>
      23             : #include <osl/diagnose.h>
      24             : #include <rtl/byteseq.hxx>
      25             : #include <rtl/ustrbuf.hxx>
      26             : #include <rtl/uuid.h>
      27             : #include <cppuhelper/compbase_ex.hxx>
      28             : 
      29             : #include "com/sun/star/uno/RuntimeException.hpp"
      30             : 
      31             : using namespace ::cppu;
      32             : using namespace ::osl;
      33             : using namespace ::com::sun::star;
      34             : using namespace ::com::sun::star::uno;
      35             : 
      36             : using rtl::OString;
      37             : using rtl::OUString;
      38             : using rtl::OUStringBuffer;
      39             : 
      40             : namespace cppu
      41             : {
      42             : 
      43             : /** Shared mutex for implementation helper initialization.
      44             :     Not for public use.
      45             : */
      46             : ::osl::Mutex & SAL_CALL getImplHelperInitMutex(void) SAL_THROW(());
      47             : 
      48             : 
      49          90 : static inline void checkInterface( Type const & rType )
      50             :     SAL_THROW( (RuntimeException) )
      51             : {
      52          90 :     if (TypeClass_INTERFACE != rType.getTypeClass())
      53             :     {
      54           0 :         OUString msg( "querying for interface \"" + rType.getTypeName() + "\": no interface type!" );
      55             :         SAL_WARN( "cppuhelper", msg );
      56           0 :         throw RuntimeException( msg, Reference< XInterface >() );
      57             :     }
      58          90 : }
      59             : 
      60          71 : static inline bool isXInterface( rtl_uString * pStr ) SAL_THROW(())
      61             : {
      62          71 :     return (*((OUString const *)&pStr) == "com.sun.star.uno.XInterface");
      63             : }
      64             : 
      65          60 : static inline void * makeInterface( sal_IntPtr nOffset, void * that ) SAL_THROW(())
      66             : {
      67          60 :     return (((char *)that) + nOffset);
      68             : }
      69             : 
      70         253 : static inline bool __td_equals(
      71             :     typelib_TypeDescriptionReference const * pTDR1,
      72             :     typelib_TypeDescriptionReference const * pTDR2 )
      73             :     SAL_THROW(())
      74             : {
      75         446 :     return ((pTDR1 == pTDR2) ||
      76         446 :             ((OUString const *)&pTDR1->pTypeName)->equals( *(OUString const *)&pTDR2->pTypeName ));
      77             : }
      78             : 
      79          88 : static inline type_entry * __getTypeEntries( class_data * cd )
      80             :     SAL_THROW( (RuntimeException) )
      81             : {
      82          88 :     type_entry * pEntries = cd->m_typeEntries;
      83          88 :     if (! cd->m_storedTypeRefs) // not inited?
      84             :     {
      85          14 :         MutexGuard guard( getImplHelperInitMutex() );
      86          14 :         if (! cd->m_storedTypeRefs) // not inited?
      87             :         {
      88             :             // get all types
      89          76 :             for ( sal_Int32 n = cd->m_nTypes; n--; )
      90             :             {
      91          48 :                 type_entry * pEntry = &pEntries[ n ];
      92          48 :                 Type const & rType = (*pEntry->m_type.getCppuType)( 0 );
      93             :                 OSL_ENSURE( rType.getTypeClass() == TypeClass_INTERFACE, "### wrong helper init: expected interface!" );
      94             :                 OSL_ENSURE( ! isXInterface( rType.getTypeLibType()->pTypeName ), "### want to implement XInterface: template argument is XInterface?!?!?!" );
      95          48 :                 if (rType.getTypeClass() != TypeClass_INTERFACE)
      96             :                 {
      97           0 :                     OUString msg( "type \"" + rType.getTypeName() + "\" is no interface type!" );
      98             :                     SAL_WARN( "cppuhelper", msg );
      99           0 :                     throw RuntimeException( msg, Reference< XInterface >() );
     100             :                 }
     101             :                 // ref is statically held by getCppuType()
     102          48 :                 pEntry->m_type.typeRef = rType.getTypeLibType();
     103             :             }
     104          14 :             cd->m_storedTypeRefs = sal_True;
     105          14 :         }
     106             :     }
     107          88 :     return pEntries;
     108             : }
     109             : 
     110           0 : static inline void __fillTypes( Type * types, class_data * cd )
     111             :     SAL_THROW( (RuntimeException) )
     112             : {
     113           0 :     type_entry * pEntries = __getTypeEntries( cd );
     114           0 :     for ( sal_Int32 n = cd->m_nTypes; n--; )
     115             :     {
     116           0 :         types[ n ] = pEntries[ n ].m_type.typeRef;
     117             :     }
     118           0 : }
     119             : 
     120             : namespace {
     121             : 
     122         101 : bool recursivelyFindType(
     123             :     typelib_TypeDescriptionReference const * demandedType,
     124             :     typelib_InterfaceTypeDescription const * type, sal_IntPtr * offset)
     125             : {
     126             :     // This code assumes that the vtables of a multiple-inheritance class (the
     127             :     // offset amount by which to adjust the this pointer) follow one another in
     128             :     // the object layout, and that they contain slots for the inherited classes
     129             :     // in a specific order.  In theory, that need not hold for any given
     130             :     // platform; in practice, it seems to work well on all supported platforms:
     131             :  next:
     132         175 :     for (sal_Int32 i = 0; i < type->nBaseTypes; ++i) {
     133         101 :         if (i > 0) {
     134           0 :             *offset += sizeof (void *);
     135             :         }
     136         101 :         typelib_InterfaceTypeDescription const * base = type->ppBaseTypes[i];
     137             :         // ignore XInterface:
     138         101 :         if (base->nBaseTypes > 0) {
     139          27 :             if (__td_equals(
     140             :                     reinterpret_cast<
     141             :                         typelib_TypeDescriptionReference const * >(base),
     142             :                     demandedType))
     143             :             {
     144           6 :                 return true;
     145             :             }
     146             :             // Profiling showed that it is important to speed up the common case
     147             :             // of only one base:
     148          21 :             if (type->nBaseTypes == 1) {
     149          21 :                 type = base;
     150          21 :                 goto next;
     151             :             }
     152           0 :             if (recursivelyFindType(demandedType, base, offset)) {
     153           0 :                 return true;
     154             :             }
     155             :         }
     156             :     }
     157          74 :     return false;
     158             : }
     159             : 
     160             : }
     161             : 
     162          88 : static inline void * __queryDeepNoXInterface(
     163             :     typelib_TypeDescriptionReference * pDemandedTDR, class_data * cd, void * that )
     164             :     SAL_THROW( (RuntimeException) )
     165             : {
     166          88 :     type_entry * pEntries = __getTypeEntries( cd );
     167          88 :     sal_Int32 nTypes = cd->m_nTypes;
     168             :     sal_Int32 n;
     169             : 
     170             :     // try top interfaces without getting td
     171         260 :     for ( n = 0; n < nTypes; ++n )
     172             :     {
     173         226 :         if (__td_equals( pEntries[ n ].m_type.typeRef, pDemandedTDR ))
     174             :         {
     175          54 :             return makeInterface( pEntries[ n ].m_offset, that );
     176             :         }
     177             :     }
     178             :     // query deep getting td
     179         108 :     for ( n = 0; n < nTypes; ++n )
     180             :     {
     181          80 :         typelib_TypeDescription * pTD = 0;
     182          80 :         TYPELIB_DANGER_GET( &pTD, pEntries[ n ].m_type.typeRef );
     183          80 :         if (pTD)
     184             :         {
     185             :             // exclude top (already tested) and bottom (XInterface) interface
     186             :             OSL_ENSURE(
     187             :                 reinterpret_cast< typelib_InterfaceTypeDescription * >(pTD)->
     188             :                     nBaseTypes > 0,
     189             :                 "### want to implement XInterface:"
     190             :                     " template argument is XInterface?!?!?!" );
     191          80 :             sal_IntPtr offset = pEntries[n].m_offset;
     192             :             bool found = recursivelyFindType(
     193             :                 pDemandedTDR,
     194             :                 reinterpret_cast< typelib_InterfaceTypeDescription * >(pTD),
     195          80 :                 &offset);
     196          80 :             TYPELIB_DANGER_RELEASE( pTD );
     197          80 :             if (found) {
     198           6 :                 return makeInterface( offset, that );
     199             :             }
     200             :         }
     201             :         else
     202             :         {
     203           0 :             OUString msg( "cannot get type description for type \"" + OUString(pEntries[ n ].m_type.typeRef->pTypeName) + "\"!" );
     204             :             SAL_WARN( "cppuhelper", msg );
     205           0 :             throw RuntimeException( msg, Reference< XInterface >() );
     206             :         }
     207             :     }
     208          28 :     return 0;
     209             : }
     210             : 
     211             : // ImplHelper
     212             : 
     213           0 : Any SAL_CALL ImplHelper_query(
     214             :     Type const & rType, class_data * cd, void * that )
     215             :     SAL_THROW( (RuntimeException) )
     216             : {
     217           0 :     checkInterface( rType );
     218           0 :     typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType();
     219             : 
     220             :     void * p;
     221             :     // shortcut for XInterface
     222           0 :     if (isXInterface( pTDR->pTypeName ))
     223             :     {
     224             :         // take first one
     225           0 :         p = makeInterface( cd->m_typeEntries[ 0 ].m_offset, that );
     226             :     }
     227             :     else
     228             :     {
     229           0 :         p = __queryDeepNoXInterface( pTDR, cd, that );
     230           0 :         if (! p)
     231             :         {
     232           0 :             return Any();
     233             :         }
     234             :     }
     235           0 :     return Any( &p, pTDR );
     236             : }
     237             : 
     238          19 : Any SAL_CALL ImplHelper_queryNoXInterface(
     239             :     Type const & rType, class_data * cd, void * that )
     240             :     SAL_THROW( (RuntimeException) )
     241             : {
     242          19 :     checkInterface( rType );
     243          19 :     typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType();
     244             : 
     245          19 :     void * p = __queryDeepNoXInterface( pTDR, cd, that );
     246          19 :     if (p)
     247             :     {
     248          16 :         return Any( &p, pTDR );
     249             :     }
     250             :     else
     251             :     {
     252           3 :         return Any();
     253             :     }
     254             : }
     255             : 
     256           0 : css::uno::Sequence<sal_Int8> ImplHelper_getImplementationId(
     257             :     SAL_UNUSED_PARAMETER class_data *) SAL_THROW((css::uno::RuntimeException))
     258             : {
     259           0 :     return css::uno::Sequence<sal_Int8>();
     260             : }
     261             : 
     262           0 : Sequence< Type > SAL_CALL ImplHelper_getTypes(
     263             :     class_data * cd )
     264             :     SAL_THROW( (RuntimeException) )
     265             : {
     266           0 :     Sequence< Type > types( cd->m_nTypes );
     267           0 :     Type * pTypes = types.getArray();
     268           0 :     __fillTypes( pTypes, cd );
     269           0 :     return types;
     270             : }
     271             : 
     272           0 : Sequence< Type >  SAL_CALL ImplInhHelper_getTypes(
     273             :     class_data * cd, Sequence< Type > const & rAddTypes )
     274             :     SAL_THROW( (RuntimeException) )
     275             : {
     276           0 :     sal_Int32 nImplTypes = cd->m_nTypes;
     277           0 :     sal_Int32 nAddTypes = rAddTypes.getLength();
     278           0 :     Sequence< Type > types( nImplTypes + nAddTypes );
     279           0 :     Type * pTypes = types.getArray();
     280           0 :     __fillTypes( pTypes, cd );
     281             :     // append base types
     282           0 :     Type const * pAddTypes = rAddTypes.getConstArray();
     283           0 :     while (nAddTypes--)
     284             :     {
     285           0 :         pTypes[ nImplTypes + nAddTypes ] = pAddTypes[ nAddTypes ];
     286             :     }
     287           0 :     return types;
     288             : }
     289             : 
     290             : // WeakImplHelper
     291             : 
     292          32 : Any SAL_CALL WeakImplHelper_query(
     293             :     Type const & rType, class_data * cd, void * that, OWeakObject * pBase )
     294             :     SAL_THROW( (RuntimeException) )
     295             : {
     296          32 :     checkInterface( rType );
     297          32 :     typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType();
     298             : 
     299             :     // shortcut XInterface to OWeakObject
     300          32 :     if (! isXInterface( pTDR->pTypeName ))
     301             :     {
     302          32 :         void * p = __queryDeepNoXInterface( pTDR, cd, that );
     303          32 :         if (p)
     304             :         {
     305          12 :             return Any( &p, pTDR );
     306             :         }
     307             :     }
     308          20 :     return pBase->OWeakObject::queryInterface( rType );
     309             : }
     310             : 
     311           0 : Sequence< Type > SAL_CALL WeakImplHelper_getTypes(
     312             :     class_data * cd )
     313             :     SAL_THROW( (RuntimeException) )
     314             : {
     315           0 :     sal_Int32 nTypes = cd->m_nTypes;
     316           0 :     Sequence< Type > types( nTypes +1 );
     317           0 :     Type * pTypes = types.getArray();
     318           0 :     __fillTypes( pTypes, cd );
     319           0 :     pTypes[ nTypes ] = ::getCppuType( (Reference< XWeak > const *)0 );
     320           0 :     return types;
     321             : }
     322             : 
     323             : // WeakAggImplHelper
     324             : 
     325           0 : Any SAL_CALL WeakAggImplHelper_queryAgg(
     326             :     Type const & rType, class_data * cd, void * that, OWeakAggObject * pBase )
     327             :     SAL_THROW( (RuntimeException) )
     328             : {
     329           0 :     checkInterface( rType );
     330           0 :     typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType();
     331             : 
     332             :     // shortcut XInterface to OWeakAggObject
     333           0 :     if (! isXInterface( pTDR->pTypeName ))
     334             :     {
     335           0 :         void * p = __queryDeepNoXInterface( pTDR, cd, that );
     336           0 :         if (p)
     337             :         {
     338           0 :             return Any( &p, pTDR );
     339             :         }
     340             :     }
     341           0 :     return pBase->OWeakAggObject::queryAggregation( rType );
     342             : }
     343             : 
     344           0 : Sequence< Type > SAL_CALL WeakAggImplHelper_getTypes(
     345             :     class_data * cd )
     346             :     SAL_THROW( (RuntimeException) )
     347             : {
     348           0 :     sal_Int32 nTypes = cd->m_nTypes;
     349           0 :     Sequence< Type > types( nTypes +2 );
     350           0 :     Type * pTypes = types.getArray();
     351           0 :     __fillTypes( pTypes, cd );
     352           0 :     pTypes[ nTypes++ ] = ::getCppuType( (Reference< XWeak > const *)0 );
     353           0 :     pTypes[ nTypes ] = ::getCppuType( (const Reference< XAggregation > *)0 );
     354           0 :     return types;
     355             : }
     356             : 
     357             : // WeakComponentImplHelper
     358             : 
     359          39 : Any SAL_CALL WeakComponentImplHelper_query(
     360             :     Type const & rType, class_data * cd, void * that, WeakComponentImplHelperBase * pBase )
     361             :     SAL_THROW( (RuntimeException) )
     362             : {
     363          39 :     checkInterface( rType );
     364          39 :     typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType();
     365             : 
     366             :     // shortcut XInterface to WeakComponentImplHelperBase
     367          39 :     if (! isXInterface( pTDR->pTypeName ))
     368             :     {
     369          37 :         void * p = __queryDeepNoXInterface( pTDR, cd, that );
     370          37 :         if (p)
     371             :         {
     372          32 :             return Any( &p, pTDR );
     373             :         }
     374             :     }
     375           7 :     return pBase->WeakComponentImplHelperBase::queryInterface( rType );
     376             : }
     377             : 
     378           0 : Sequence< Type > SAL_CALL WeakComponentImplHelper_getTypes(
     379             :     class_data * cd )
     380             :     SAL_THROW( (RuntimeException) )
     381             : {
     382           0 :     sal_Int32 nTypes = cd->m_nTypes;
     383           0 :     Sequence< Type > types( nTypes +2 );
     384           0 :     Type * pTypes = types.getArray();
     385           0 :     __fillTypes( pTypes, cd );
     386           0 :     pTypes[ nTypes++ ] = ::getCppuType( (Reference< XWeak > const *)0 );
     387           0 :     pTypes[ nTypes ] = ::getCppuType( (Reference< lang::XComponent > const *)0 );
     388           0 :     return types;
     389             : }
     390             : 
     391             : // WeakAggComponentImplHelper
     392             : 
     393           0 : Any SAL_CALL WeakAggComponentImplHelper_queryAgg(
     394             :     Type const & rType, class_data * cd, void * that, WeakAggComponentImplHelperBase * pBase )
     395             :     SAL_THROW( (RuntimeException) )
     396             : {
     397           0 :     checkInterface( rType );
     398           0 :     typelib_TypeDescriptionReference * pTDR = rType.getTypeLibType();
     399             : 
     400             :     // shortcut XInterface to WeakAggComponentImplHelperBase
     401           0 :     if (! isXInterface( pTDR->pTypeName ))
     402             :     {
     403           0 :         void * p = __queryDeepNoXInterface( pTDR, cd, that );
     404           0 :         if (p)
     405             :         {
     406           0 :             return Any( &p, pTDR );
     407             :         }
     408             :     }
     409           0 :     return pBase->WeakAggComponentImplHelperBase::queryAggregation( rType );
     410             : }
     411             : 
     412           0 : Sequence< Type > SAL_CALL WeakAggComponentImplHelper_getTypes(
     413             :     class_data * cd )
     414             :     SAL_THROW( (RuntimeException) )
     415             : {
     416           0 :     sal_Int32 nTypes = cd->m_nTypes;
     417           0 :     Sequence< Type > types( nTypes +3 );
     418           0 :     Type * pTypes = types.getArray();
     419           0 :     __fillTypes( pTypes, cd );
     420           0 :     pTypes[ nTypes++ ] = ::getCppuType( (Reference< XWeak > const *)0 );
     421           0 :     pTypes[ nTypes++ ] = ::getCppuType( (const Reference< XAggregation > *)0 );
     422           0 :     pTypes[ nTypes ] = ::getCppuType( (const Reference< lang::XComponent > *)0 );
     423           0 :     return types;
     424             : }
     425             : 
     426             : }
     427             : 
     428             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */

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