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+/* -*- 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 <config_features.h>
+
+#include <rtl/instance.hxx>
+#include <osl/diagnose.h>
+#include <osl/doublecheckedlocking.h>
+#include <sal/log.hxx>
+#include <uno/dispatcher.hxx>
+#include <uno/lbnames.h>
+#include <uno/mapping.hxx>
+#include <cppuhelper/detail/XExceptionThrower.hpp>
+#include <com/sun/star/ucb/InteractiveAugmentedIOException.hpp>
+#include <com/sun/star/ucb/NameClashException.hpp>
+#include <com/sun/star/uno/RuntimeException.hpp>
+
+#include <cppuhelper/exc_hlp.hxx>
+
+using namespace ::osl;
+using namespace ::cppu;
+using namespace ::com::sun::star;
+using namespace ::com::sun::star::uno;
+
+namespace
+{
+
+using cppuhelper::detail::XExceptionThrower;
+
+
+struct ExceptionThrower : public uno_Interface, XExceptionThrower
+{
+ ExceptionThrower();
+
+ virtual ~ExceptionThrower() {}
+
+ static Type const & getCppuType()
+ {
+ return cppu::UnoType<XExceptionThrower>::get();
+ }
+
+ // XInterface
+ virtual Any SAL_CALL queryInterface( Type const & type ) override;
+ virtual void SAL_CALL acquire() throw () override;
+ virtual void SAL_CALL release() throw () override;
+
+ // XExceptionThrower
+ virtual void SAL_CALL throwException( Any const & exc ) override;
+ virtual void SAL_CALL rethrowException() override;
+};
+
+extern "C"
+{
+
+
+void ExceptionThrower_acquire_release_nop(
+ SAL_UNUSED_PARAMETER uno_Interface * )
+{}
+
+
+void ExceptionThrower_dispatch(
+ uno_Interface * pUnoI, typelib_TypeDescription const * pMemberType,
+ void * pReturn, void * pArgs [], uno_Any ** ppException )
+{
+ OSL_ASSERT( pMemberType->eTypeClass == typelib_TypeClass_INTERFACE_METHOD );
+
+ switch (reinterpret_cast< typelib_InterfaceMemberTypeDescription * >(
+ const_cast< typelib_TypeDescription * >( pMemberType ) )->
+ nPosition)
+ {
+ case 0: // queryInterface()
+ {
+ Type const & rType_demanded =
+ *static_cast< Type const * >( pArgs[ 0 ] );
+ if (rType_demanded.equals( cppu::UnoType<XInterface>::get() ) ||
+ rType_demanded.equals( ExceptionThrower::getCppuType() ))
+ {
+ typelib_TypeDescription * pTD = nullptr;
+ TYPELIB_DANGER_GET( &pTD, rType_demanded.getTypeLibType() );
+ uno_any_construct(
+ static_cast< uno_Any * >( pReturn ), &pUnoI, pTD, nullptr );
+ TYPELIB_DANGER_RELEASE( pTD );
+ }
+ else
+ {
+ uno_any_construct(
+ static_cast< uno_Any * >( pReturn ), nullptr, nullptr, nullptr );
+ }
+ *ppException = nullptr;
+ break;
+ }
+ case 1: // acquire()
+ case 2: // release()
+ *ppException = nullptr;
+ break;
+ case 3: // throwException()
+ {
+ uno_Any * pAny = static_cast< uno_Any * >( pArgs[ 0 ] );
+ OSL_ASSERT( pAny->pType->eTypeClass == typelib_TypeClass_EXCEPTION );
+ uno_type_any_construct( *ppException, pAny->pData, pAny->pType, nullptr );
+ break;
+ }
+ default:
+ {
+ OSL_ASSERT( false );
+ RuntimeException exc( "not implemented!" );
+ uno_type_any_construct(
+ *ppException, &exc, cppu::UnoType<decltype(exc)>::get().getTypeLibType(), nullptr );
+ break;
+ }
+ }
+}
+
+} // extern "C"
+
+
+Any ExceptionThrower::queryInterface( Type const & type )
+{
+ if (type.equals( cppu::UnoType<XInterface>::get() ) ||
+ type.equals( ExceptionThrower::getCppuType() ))
+ {
+ XExceptionThrower * that = this;
+ return Any( &that, type );
+ }
+ return Any();
+}
+
+
+void ExceptionThrower::acquire() throw ()
+{
+}
+
+void ExceptionThrower::release() throw ()
+{
+}
+
+
+void ExceptionThrower::throwException( Any const & exc )
+{
+ OSL_FAIL( "unexpected!" );
+ cppu::throwException( exc );
+}
+
+
+void ExceptionThrower::rethrowException()
+{
+ throw;
+}
+
+
+ExceptionThrower::ExceptionThrower()
+{
+ uno_Interface::acquire = ExceptionThrower_acquire_release_nop;
+ uno_Interface::release = ExceptionThrower_acquire_release_nop;
+ uno_Interface::pDispatcher = ExceptionThrower_dispatch;
+}
+
+class theExceptionThrower : public rtl::Static<ExceptionThrower, theExceptionThrower> {};
+
+#if defined(IOS) || (defined(__aarch64__) && defined(ANDROID))
+// In the native iOS / Android app, where we don't have any Java, Python,
+// BASIC, or other scripting, the only thing that would use the C++/UNO bridge
+// functionality that invokes codeSnippet() was cppu::throwException().
+//
+// codeSnippet() is part of what corresponds to the code that uses
+// run-time-generated machine code on other platforms. We can't generate code
+// at run-time on iOS, that has been known forever.
+//
+// Instead of digging in and trying to understand what is wrong, another
+// solution was chosen. It turns out that the number of types of exception
+// objects thrown by cppu::throwException() is fairly small. During startup of
+// the LibreOffice code, and loading of an .odt document, only one kind of
+// exception is thrown this way... (The lovely
+// css::ucb:InteractiveAugmentedIOException.)
+//
+// So we can simply have code that checks what the type of object being thrown
+// is, and explicitly throws such an object then with a normal C++ throw
+// statement. Seems to work.
+template <class E> void tryThrow(css::uno::Any const& aException)
+{
+ E aSpecificException;
+ if (aException >>= aSpecificException)
+ throw aSpecificException;
+}
+
+void lo_mobile_throwException(css::uno::Any const& aException)
+{
+ assert(aException.getValueTypeClass() == css::uno::TypeClass_EXCEPTION);
+
+ tryThrow<css::ucb::InteractiveAugmentedIOException>(aException);
+ tryThrow<css::ucb::NameClashException>(aException);
+ tryThrow<css::uno::RuntimeException>(aException);
+
+ SAL_WARN("cppuhelper", "lo_mobile_throwException: Unhandled exception type: " << aException.getValueTypeName());
+
+ assert(false);
+}
+#endif // defined(IOS) || (defined(__aarch64__) && defined(ANDROID))
+
+} // anonymous namespace
+
+
+namespace cppu
+{
+
+
+void SAL_CALL throwException( Any const & exc )
+{
+ if (exc.getValueTypeClass() != TypeClass_EXCEPTION)
+ {
+ throw RuntimeException(
+ "no UNO exception given "
+ "(must be derived from com::sun::star::uno::Exception)!" );
+ }
+
+#if defined(IOS) || (defined(__aarch64__) && defined(ANDROID))
+ lo_mobile_throwException(exc);
+#else
+ Mapping uno2cpp(Environment(UNO_LB_UNO), Environment::getCurrent());
+ if (! uno2cpp.is())
+ {
+ throw RuntimeException(
+ "cannot get binary UNO to C++ mapping!" );
+ }
+
+ Reference< XExceptionThrower > xThrower;
+ uno2cpp.mapInterface(
+ reinterpret_cast< void ** >( &xThrower ),
+ static_cast< uno_Interface * >( &theExceptionThrower::get() ),
+ ExceptionThrower::getCppuType() );
+ OSL_ASSERT( xThrower.is() );
+ xThrower->throwException( exc );
+#endif
+}
+
+
+Any SAL_CALL getCaughtException()
+{
+#if defined(__aarch64__) && defined(ANDROID)
+ // FIXME This stuff works on 32bit ARM, let's use the shortcut only for
+ // the 64bit ARM.
+ return Any();
+#else
+ Mapping cpp2uno(Environment::getCurrent(), Environment(UNO_LB_UNO));
+ if (! cpp2uno.is())
+ {
+ throw RuntimeException(
+ "cannot get C++ to binary UNO mapping!" );
+ }
+ Mapping uno2cpp(Environment(UNO_LB_UNO), Environment::getCurrent());
+ if (! uno2cpp.is())
+ {
+ throw RuntimeException(
+ "cannot get binary UNO to C++ mapping!" );
+ }
+
+ typelib_TypeDescription * pTD = nullptr;
+ TYPELIB_DANGER_GET(
+ &pTD, ExceptionThrower::getCppuType().getTypeLibType() );
+
+ UnoInterfaceReference unoI;
+ cpp2uno.mapInterface(
+ reinterpret_cast< void ** >( &unoI.m_pUnoI ),
+ static_cast< XExceptionThrower * >( &theExceptionThrower::get() ), pTD );
+ OSL_ASSERT( unoI.is() );
+
+ typelib_TypeDescription * pMemberTD = nullptr;
+ TYPELIB_DANGER_GET(
+ &pMemberTD,
+ reinterpret_cast< typelib_InterfaceTypeDescription * >( pTD )->
+ ppMembers[ 1 ] /* rethrowException() */ );
+
+ uno_Any exc_mem;
+ uno_Any * exc = &exc_mem;
+ unoI.dispatch( pMemberTD, nullptr, nullptr, &exc );
+
+ TYPELIB_DANGER_RELEASE( pMemberTD );
+ TYPELIB_DANGER_RELEASE( pTD );
+
+ if (exc == nullptr)
+ {
+ throw RuntimeException( "rethrowing C++ exception failed!" );
+ }
+
+ Any ret;
+ uno_any_destruct( &ret, reinterpret_cast< uno_ReleaseFunc >(cpp_release) );
+ uno_type_any_constructAndConvert(
+ &ret, exc->pData, exc->pType, uno2cpp.get() );
+ uno_any_destruct( exc, nullptr );
+ return ret;
+#endif
+}
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */