Adding upstream version 4:24.2.0.upstream/4%24.2.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 314 insertions, 0 deletions

diff --git a/cppuhelper/source/exc_thrower.cxx b/cppuhelper/source/exc_thrower.cxx
new file mode 100644
index 0000000000..57e2ad1d02
--- /dev/null
+++ b/cppuhelper/source/exc_thrower.cxx
@@ -0,0 +1,314 @@
+/* -*- 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 <rtl/instance.hxx>
+#include <osl/diagnose.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() noexcept override;
+    virtual void SAL_CALL release() noexcept 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() noexcept
+{
+}
+
+void ExceptionThrower::release() noexcept
+{
+}
+
+
+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;
+}
+
+#if defined(IOS) || defined(ANDROID) || defined(EMSCRIPTEN)
+#define RETHROW_FAKE_EXCEPTIONS 1
+#else
+#define RETHROW_FAKE_EXCEPTIONS 0
+#endif
+
+class theExceptionThrower : public rtl::Static<ExceptionThrower, theExceptionThrower> {};
+
+#if RETHROW_FAKE_EXCEPTIONS
+// 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 // RETHROW_FAKE_EXCEPTIONS
+
+} // 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 RETHROW_FAKE_EXCEPTIONS
+    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 // !RETHROW_FAKE_EXCEPTIONS
+}
+
+
+Any SAL_CALL getCaughtException()
+{
+    // why does this differ from RETHROW_FAKE_EXCEPTIONS?
+#if defined(ANDROID) || defined(EMSCRIPTEN)
+    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: */