New unoidl-check tool to replace regcompare

...for checking compatibility with the reference rdbs.  unoidl-check is no
longer based on the legacy registry format, but can process all the various new
UNOIDL registry formats.  regcompare is still included in the SDK for now.

(gb_UnoApi[Target]_set_reference_rdbfile now takes a non-empty sequence of rdb
files, any necessary dependencies of the final rdf file preceding it just like
it is required on the unoidl-check command line.  Also, executing the
unoidl-check now properly depends on those rdb files.)

TODO: unoidl-check is too conservative for now and flags some changes as
incompatible that are not.

Change-Id: I92e4c69403c5e3fcb31707c98c65a2f509592dd4

3 files changed, 945 insertions, 0 deletions

diff --git a/unoidl/Executable_unoidl-check.mk b/unoidl/Executable_unoidl-check.mk
new file mode 100644
index 000000000000..562fba9b8828
--- /dev/null
+++ b/unoidl/Executable_unoidl-check.mk
@@ -0,0 +1,22 @@
+# -*- Mode: makefile-gmake; tab-width: 4; indent-tabs-mode: t -*-
+#
+# 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/.
+#
+
+$(eval $(call gb_Executable_Executable,unoidl-check))
+
+$(eval $(call gb_Executable_add_exception_objects,unoidl-check, \
+    unoidl/source/unoidl-check \
+))
+
+$(eval $(call gb_Executable_use_libraries,unoidl-check, \
+    sal \
+    salhelper \
+    unoidl \
+))
+
+# vim: set noet sw=4 ts=4:
diff --git a/unoidl/Module_unoidl.mk b/unoidl/Module_unoidl.mk
index 93f816493774..e377ba8162c3 100644
--- a/unoidl/Module_unoidl.mk
+++ b/unoidl/Module_unoidl.mk
@@ -16,6 +16,7 @@ $(eval $(call gb_Module_add_targets,unoidl, \
 ))
 
 $(eval $(call gb_Module_add_targets_for_build,unoidl, \
+    Executable_unoidl-check \
     Executable_unoidl-write \
 ))
 
diff --git a/unoidl/source/unoidl-check.cxx b/unoidl/source/unoidl-check.cxx
new file mode 100644
index 000000000000..ff84f52c655c
--- /dev/null
+++ b/unoidl/source/unoidl-check.cxx
@@ -0,0 +1,922 @@
+/* -*- 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/.
+ */
+
+#include "sal/config.h"
+
+#include <cassert>
+#include <cstdlib>
+#include <iostream>
+#include <vector>
+
+#include "osl/file.hxx"
+#include "osl/process.h"
+#include "rtl/process.h"
+#include "rtl/ref.hxx"
+#include "rtl/ustring.hxx"
+#include "sal/main.h"
+#include "sal/types.h"
+#include "unoidl/unoidl.hxx"
+
+namespace unoidl {
+
+bool operator ==(ConstantValue const & lhs, ConstantValue const & rhs) {
+    if (lhs.type == rhs.type) {
+        switch (lhs.type) {
+        case ConstantValue::TYPE_BOOLEAN:
+            return lhs.booleanValue == rhs.booleanValue;
+        case ConstantValue::TYPE_BYTE:
+            return lhs.byteValue == rhs.byteValue;
+        case ConstantValue::TYPE_SHORT:
+            return lhs.shortValue == rhs.shortValue;
+        case ConstantValue::TYPE_UNSIGNED_SHORT:
+            return lhs.unsignedShortValue == rhs.unsignedShortValue;
+        case ConstantValue::TYPE_LONG:
+            return lhs.longValue == rhs.longValue;
+        case ConstantValue::TYPE_UNSIGNED_LONG:
+            return lhs.unsignedLongValue == rhs.unsignedLongValue;
+        case ConstantValue::TYPE_HYPER:
+            return lhs.hyperValue == rhs.hyperValue;
+        case ConstantValue::TYPE_UNSIGNED_HYPER:
+            return lhs.unsignedHyperValue == rhs.unsignedHyperValue;
+        case ConstantValue::TYPE_FLOAT:
+            return lhs.floatValue == rhs.floatValue;
+        case ConstantValue::TYPE_DOUBLE:
+            return lhs.doubleValue == rhs.doubleValue;
+        }
+    }
+    return false;
+}
+
+bool operator !=(ConstantValue const & lhs, ConstantValue const & rhs) {
+    return !(lhs == rhs);
+}
+
+bool operator ==(
+    SingleInterfaceBasedServiceEntity::Constructor::Parameter const & lhs,
+    SingleInterfaceBasedServiceEntity::Constructor::Parameter const & rhs)
+{
+    return lhs.name == rhs.name && lhs.type == rhs.type && lhs.rest == rhs.rest;
+}
+
+}
+
+namespace {
+
+void badUsage() {
+    std::cerr
+        << "Usage:" << std::endl << std::endl
+        << ("  unoidl-check [<extra registries A>] <registry A> -- [<extra"
+            " registries B>]")
+        << std::endl << "    <registry B>" << std::endl << std::endl
+        << ("where each <registry> is either a new- or legacy-format .rdb file,"
+            " a single .idl")
+        << std::endl
+        << ("file, or a root directory of an .idl file tree.  Check that each"
+            " entity from")
+        << std::endl
+        << "<registry A> is also present in <registry B> in a compatible form."
+        << std::endl;
+    std::exit(EXIT_FAILURE);
+}
+
+OUString getArgumentUri(sal_uInt32 argument, bool * delimiter) {
+    OUString arg;
+    rtl_getAppCommandArg(argument, &arg.pData);
+    if (arg == "--") {
+        if (delimiter == 0) {
+            badUsage();
+        }
+        *delimiter = true;
+        return OUString();
+    }
+    OUString url;
+    osl::FileBase::RC e1 = osl::FileBase::getFileURLFromSystemPath(arg, url);
+    if (e1 != osl::FileBase::E_None) {
+        std::cerr
+            << "Cannot convert \"" << arg << "\" to file URL, error code "
+            << +e1 << std::endl;
+        std::exit(EXIT_FAILURE);
+    }
+    OUString cwd;
+    oslProcessError e2 = osl_getProcessWorkingDir(&cwd.pData);
+    if (e2 != osl_Process_E_None) {
+        std::cerr
+            << "Cannot obtain working directory, error code " << +e2
+            << std::endl;
+        std::exit(EXIT_FAILURE);
+    }
+    OUString abs;
+    e1 = osl::FileBase::getAbsoluteFileURL(cwd, url, abs);
+    if (e1 != osl::FileBase::E_None) {
+        std::cerr
+            << "Cannot make \"" << url
+            << "\" into an absolute file URL, error code " << +e1 << std::endl;
+        std::exit(EXIT_FAILURE);
+    }
+    return abs;
+}
+
+OUString showDirection(
+    unoidl::InterfaceTypeEntity::Method::Parameter::Direction direction)
+{
+    switch (direction) {
+    case unoidl::InterfaceTypeEntity::Method::Parameter::DIRECTION_IN:
+        return OUString("[in]");
+    case unoidl::InterfaceTypeEntity::Method::Parameter::DIRECTION_OUT:
+        return OUString("[out]");
+    case unoidl::InterfaceTypeEntity::Method::Parameter::DIRECTION_IN_OUT:
+        return OUString("[inout]");
+    default:
+        assert(false); for (;;) { std::abort(); } // this cannot happen
+    }
+}
+
+void checkMap(
+    rtl::Reference<unoidl::Provider> const & providerB, OUString const & prefix,
+    rtl::Reference<unoidl::MapCursor> const & cursor)
+{
+    assert(providerB.is());
+    assert(cursor.is());
+    for (;;) {
+        OUString id;
+        rtl::Reference<unoidl::Entity> entA(cursor->getNext(&id));
+        if (!entA.is()) {
+            break;
+        }
+        OUString name(prefix + id);
+        if (entA->getSort() == unoidl::Entity::SORT_MODULE) {
+            checkMap(
+                providerB, name + ".",
+                (static_cast<unoidl::ModuleEntity *>(entA.get())
+                 ->createCursor()));
+        } else {
+            rtl::Reference<unoidl::Entity> entB(providerB->findEntity(name));
+            if (!entB.is()) {
+                std::cerr
+                    << "A entity " << name << " is not present in B"
+                    << std::endl;
+                std::exit(EXIT_FAILURE);
+            }
+            if (entA->getSort() != entB->getSort()) {
+                std::cerr
+                    << "A entity " << name << " is of different sort in B"
+                    << std::endl;
+                std::exit(EXIT_FAILURE);
+            }
+            if ((dynamic_cast<unoidl::PublishableEntity *>(entA.get())
+                 ->isPublished())
+                && (!dynamic_cast<unoidl::PublishableEntity *>(entB.get())
+                    ->isPublished()))
+            {
+                std::cerr
+                    << "A published entity " << name << " is not published in B"
+                    << std::endl;
+                std::exit(EXIT_FAILURE);
+            }
+            switch (entA->getSort()) {
+            case unoidl::Entity::SORT_MODULE:
+                assert(false); // this cannot happen
+            case unoidl::Entity::SORT_ENUM_TYPE:
+                {
+                    rtl::Reference<unoidl::EnumTypeEntity> ent2A(
+                        static_cast<unoidl::EnumTypeEntity *>(entA.get()));
+                    rtl::Reference<unoidl::EnumTypeEntity> ent2B(
+                        static_cast<unoidl::EnumTypeEntity *>(entB.get()));
+                    if (ent2A->getMembers().size()
+                        != ent2B->getMembers().size())
+                    {
+                        std::cerr
+                            << "enum type " << name
+                            << " number of members changed from "
+                            << ent2A->getMembers().size() << " to "
+                            << ent2B->getMembers().size() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::EnumTypeEntity::Member>::const_iterator
+                             i(ent2A->getMembers().begin()),
+                             j(ent2B->getMembers().begin());
+                         i != ent2A->getMembers().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name || i->value != j->value) {
+                            std::cerr
+                                << "enum type " << name << " member #"
+                                << i - ent2A->getMembers().begin() + 1
+                                << " changed from " << i->name << " = "
+                                << i->value << " to " << j->name << " = "
+                                << j->value << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_PLAIN_STRUCT_TYPE:
+                {
+                    rtl::Reference<unoidl::PlainStructTypeEntity> ent2A(
+                        static_cast<unoidl::PlainStructTypeEntity *>(
+                            entA.get()));
+                    rtl::Reference<unoidl::PlainStructTypeEntity> ent2B(
+                        static_cast<unoidl::PlainStructTypeEntity *>(
+                            entB.get()));
+                    if (ent2A->getDirectBase() != ent2B->getDirectBase()) {
+                        std::cerr
+                            << "plain struct type " << name
+                            << " direct base changed from "
+                            << (ent2A->getDirectBase().isEmpty()
+                                ? OUString("none") : ent2A->getDirectBase())
+                            << " to "
+                            << (ent2B->getDirectBase().isEmpty()
+                                ? OUString("none") : ent2B->getDirectBase())
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    if (ent2A->getDirectMembers().size()
+                        != ent2B->getDirectMembers().size())
+                    {
+                        std::cerr
+                            << "plain struct type " << name
+                            << " number of direct members changed from "
+                            << ent2A->getDirectMembers().size() << " to "
+                            << ent2B->getDirectMembers().size() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::PlainStructTypeEntity::Member>::const_iterator
+                             i(ent2A->getDirectMembers().begin()),
+                             j(ent2B->getDirectMembers().begin());
+                         i != ent2A->getDirectMembers().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name || i->type != j->type) {
+                            std::cerr
+                                << "plain struct type " << name
+                                << " direct member #"
+                                << i - ent2A->getDirectMembers().begin() + 1
+                                << " changed from " << i->type << " " << i->name
+                                << " to " << j->type << " " << j->name
+                                << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_POLYMORPHIC_STRUCT_TYPE_TEMPLATE:
+                {
+                    rtl::Reference<unoidl::PolymorphicStructTypeTemplateEntity>
+                        ent2A(
+                            static_cast<unoidl::PolymorphicStructTypeTemplateEntity *>(
+                                entA.get()));
+                    rtl::Reference<unoidl::PolymorphicStructTypeTemplateEntity>
+                        ent2B(
+                            static_cast<unoidl::PolymorphicStructTypeTemplateEntity *>(
+                                entB.get()));
+                    if (ent2A->getTypeParameters().size()
+                        != ent2B->getTypeParameters().size())
+                    {
+                        std::cerr
+                            << "polymorphic struct type template " << name
+                            << " number of type parameters changed from "
+                            << ent2A->getTypeParameters().size() << " to "
+                            << ent2B->getTypeParameters().size() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<OUString>::const_iterator
+                             i(ent2A->getTypeParameters().begin()),
+                             j(ent2B->getTypeParameters().begin());
+                         i != ent2A->getTypeParameters().end(); ++i, ++j)
+                    {
+                        if (*i != *j) {
+                            std::cerr
+                                << "polymorphic struct type template " << name
+                                << " type parameter #"
+                                << i - ent2A->getTypeParameters().begin() + 1
+                                << " changed from " << *i << " to " << *j
+                                << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    if (ent2A->getMembers().size()
+                        != ent2B->getMembers().size())
+                    {
+                        std::cerr
+                            << "polymorphic struct type template " << name
+                            << " number of members changed from "
+                            << ent2A->getMembers().size() << " to "
+                            << ent2B->getMembers().size() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::PolymorphicStructTypeTemplateEntity::Member>::const_iterator
+                             i(ent2A->getMembers().begin()),
+                             j(ent2B->getMembers().begin());
+                         i != ent2A->getMembers().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name || i->type != j->type
+                            || i->parameterized != j->parameterized)
+                        {
+                            std::cerr
+                                << "polymorphic struct type template " << name
+                                << " member #"
+                                << i - ent2A->getMembers().begin() + 1
+                                << " changed from "
+                                << (i->parameterized
+                                    ? OUString("parameterized ") : OUString())
+                                << i->type << " " << i->name
+                                << " to "
+                                << (j->parameterized
+                                    ? OUString("parameterized ") : OUString())
+                                << j->type << " " << j->name
+                                << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_EXCEPTION_TYPE:
+                {
+                    rtl::Reference<unoidl::ExceptionTypeEntity> ent2A(
+                        static_cast<unoidl::ExceptionTypeEntity *>(entA.get()));
+                    rtl::Reference<unoidl::ExceptionTypeEntity> ent2B(
+                        static_cast<unoidl::ExceptionTypeEntity *>(entB.get()));
+                    if (ent2A->getDirectBase() != ent2B->getDirectBase()) {
+                        std::cerr
+                            << "exception type " << name
+                            << " direct base changed from "
+                            << (ent2A->getDirectBase().isEmpty()
+                                ? OUString("none") : ent2A->getDirectBase())
+                            << " to "
+                            << (ent2B->getDirectBase().isEmpty()
+                                ? OUString("none") : ent2B->getDirectBase())
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    if (ent2A->getDirectMembers().size()
+                        != ent2B->getDirectMembers().size())
+                    {
+                        std::cerr
+                            << "exception type " << name
+                            << " number of direct members changed from "
+                            << ent2A->getDirectMembers().size() << " to "
+                            << ent2B->getDirectMembers().size() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::ExceptionTypeEntity::Member>::const_iterator
+                             i(ent2A->getDirectMembers().begin()),
+                             j(ent2B->getDirectMembers().begin());
+                         i != ent2A->getDirectMembers().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name || i->type != j->type) {
+                            std::cerr
+                                << "exception type " << name
+                                << " direct member #"
+                                << i - ent2A->getDirectMembers().begin() + 1
+                                << " changed from " << i->type << " " << i->name
+                                << " to " << j->type << " " << j->name
+                                << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_INTERFACE_TYPE:
+                {
+                    rtl::Reference<unoidl::InterfaceTypeEntity> ent2A(
+                        static_cast<unoidl::InterfaceTypeEntity *>(entA.get()));
+                    rtl::Reference<unoidl::InterfaceTypeEntity> ent2B(
+                        static_cast<unoidl::InterfaceTypeEntity *>(entB.get()));
+                    if (ent2A->getDirectMandatoryBases().size()
+                        != ent2B->getDirectMandatoryBases().size())
+                    {
+                        std::cerr
+                            << "interface type " << name
+                            << " number of direct mandatory bases changed from "
+                            << ent2A->getDirectMandatoryBases().size() << " to "
+                            << ent2B->getDirectMandatoryBases().size()
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::AnnotatedReference>::const_iterator
+                             i(ent2A->getDirectMandatoryBases().begin()),
+                             j(ent2B->getDirectMandatoryBases().begin());
+                         i != ent2A->getDirectMandatoryBases().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name) {
+                            std::cerr
+                                << "interface type " << name
+                                << " direct mandatory base #"
+                                << (i - ent2A->getDirectMandatoryBases().begin()
+                                    + 1)
+                                << " changed from " << i->name << " to "
+                                << j->name << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    if (ent2A->getDirectOptionalBases().size()
+                        != ent2B->getDirectOptionalBases().size())
+                    {
+                        std::cerr
+                            << "interface type " << name
+                            << " number of direct optional bases changed from "
+                            << ent2A->getDirectOptionalBases().size() << " to "
+                            << ent2B->getDirectOptionalBases().size()
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::AnnotatedReference>::const_iterator
+                             i(ent2A->getDirectOptionalBases().begin()),
+                             j(ent2B->getDirectOptionalBases().begin());
+                         i != ent2A->getDirectOptionalBases().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name) {
+                            std::cerr
+                                << "interface type " << name
+                                << " direct optional base #"
+                                << (i - ent2A->getDirectOptionalBases().begin()
+                                    + 1)
+                                << " changed from " << i->name << " to "
+                                << j->name << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    if (ent2A->getDirectAttributes().size()
+                        != ent2B->getDirectAttributes().size())
+                    {
+                        std::cerr
+                            << "interface type " << name
+                            << " number of direct attributes changed from "
+                            << ent2A->getDirectAttributes().size() << " to "
+                            << ent2B->getDirectAttributes().size() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::InterfaceTypeEntity::Attribute>::const_iterator
+                             i(ent2A->getDirectAttributes().begin()),
+                             j(ent2B->getDirectAttributes().begin());
+                         i != ent2A->getDirectAttributes().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name || i->type != j->type
+                            || i->bound != j->bound
+                            || i->readOnly != j->readOnly
+                            || i->getExceptions != j->getExceptions
+                            || i->setExceptions != j->setExceptions)
+                        {
+                            std::cerr
+                                << "interface type " << name
+                                << " direct attribute #"
+                                << i - ent2A->getDirectAttributes().begin() + 1
+                                << " changed from "
+                                << (i->bound ? OUString("bound ") : OUString())
+                                << (i->readOnly
+                                    ? OUString("read-only ") : OUString())
+                                << i->type << " " << i->name //TODO: exceptions
+                                << " to "
+                                << (j->bound ? OUString("bound ") : OUString())
+                                << (j->readOnly
+                                    ? OUString("read-only ") : OUString())
+                                << j->type << " " << j->name //TODO: exceptions
+                                << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    if (ent2A->getDirectMethods().size()
+                        != ent2B->getDirectMethods().size())
+                    {
+                        std::cerr
+                            << "interface type " << name
+                            << " number of direct methods changed from "
+                            << ent2A->getDirectMethods().size() << " to "
+                            << ent2B->getDirectMethods().size() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::InterfaceTypeEntity::Method>::const_iterator
+                             i(ent2A->getDirectMethods().begin()),
+                             j(ent2B->getDirectMethods().begin());
+                         i != ent2A->getDirectMethods().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name || i->returnType != j->returnType
+                            || i->exceptions != j->exceptions)
+                        {
+                            std::cerr
+                                << "interface type " << name
+                                << " direct method #"
+                                << i - ent2A->getDirectMethods().begin() + 1
+                                << " changed from "
+                                << i->returnType << " " << i->name //TODO: exceptions
+                                << " to " << j->returnType << " " << j->name //TODO: exceptions
+                                << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                        if (i->parameters.size() != j->parameters.size()) {
+                            std::cerr
+                                << "interface type " << name
+                                << " direct method " << i->name
+                                << " number of parameters changed from "
+                                << i->parameters.size() << " to "
+                                << j->parameters.size() << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                        for (std::vector<unoidl::InterfaceTypeEntity::Method::Parameter>::const_iterator
+                                 k(i->parameters.begin()),
+                                 l(j->parameters.begin());
+                             k != i->parameters.end(); ++k, ++l)
+                        {
+                            if (k->type != l->type || k->direction != l->direction)
+                            {
+                                std::cerr
+                                    << "interface type " << name
+                                    << " direct method " << i->name
+                                    << " parameter #"
+                                    << k - i->parameters.begin() + 1
+                                    << " changed from "
+                                    << showDirection(k->direction) << " "
+                                    << k->type << " to "
+                                    << showDirection(l->direction) << " "
+                                    << l->type << std::endl;
+                                std::exit(EXIT_FAILURE);
+                            }
+                            if (k->name != l->name) {
+                                std::cerr
+                                    << "Warning: interface type " << name
+                                    << " direct method " << i->name
+                                    << " parameter #"
+                                    << k - i->parameters.begin() + 1
+                                    << " changed name from " << k->name
+                                    << " to " << l->name << std::endl;
+                            }
+                        }
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_TYPEDEF:
+                {
+                    rtl::Reference<unoidl::TypedefEntity> ent2A(
+                        static_cast<unoidl::TypedefEntity *>(entA.get()));
+                    rtl::Reference<unoidl::TypedefEntity> ent2B(
+                        static_cast<unoidl::TypedefEntity *>(entB.get()));
+                    if (ent2A->getType() != ent2B->getType()) {
+                        std::cerr
+                            << "typedef " << name << " type changed from "
+                            << ent2A->getType() << " to " << ent2B->getType()
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_CONSTANT_GROUP:
+                {
+                    rtl::Reference<unoidl::ConstantGroupEntity> ent2A(
+                        static_cast<unoidl::ConstantGroupEntity *>(entA.get()));
+                    rtl::Reference<unoidl::ConstantGroupEntity> ent2B(
+                        static_cast<unoidl::ConstantGroupEntity *>(entB.get()));
+                    for (std::vector<unoidl::ConstantGroupEntity::Member>::const_iterator
+                             i(ent2A->getMembers().begin());
+                         i != ent2A->getMembers().end(); ++i)
+                    {
+                        bool found = false;
+                        for (std::vector<unoidl::ConstantGroupEntity::Member>::const_iterator
+                                 j(ent2B->getMembers().begin());
+                             j != ent2B->getMembers().end(); ++j)
+                        {
+                            if (i->name == j->name) {
+                                if (i->value != j->value) {
+                                    std::cerr
+                                        << "constant group " << name
+                                        << " member " << i->name
+                                        << " changed value" << std::endl;
+                                    std::exit(EXIT_FAILURE);
+                                }
+                                found = true;
+                                break;
+                            }
+                        }
+                        if (!found) {
+                            std::cerr
+                                << "A constant group " << name << " member "
+                                << i->name << " is not present in B"
+                                << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_SINGLE_INTERFACE_BASED_SERVICE:
+                {
+                    rtl::Reference<unoidl::SingleInterfaceBasedServiceEntity>
+                        ent2A(
+                            static_cast<unoidl::SingleInterfaceBasedServiceEntity *>(
+                                entA.get()));
+                    rtl::Reference<unoidl::SingleInterfaceBasedServiceEntity>
+                        ent2B(
+                            static_cast<unoidl::SingleInterfaceBasedServiceEntity *>(
+                                entB.get()));
+                    if (ent2A->getBase() != ent2B->getBase()) {
+                        std::cerr
+                            << "single-interface--based servcie " << name
+                            << " base changed from " << ent2A->getBase()
+                            << " to " << ent2B->getBase()
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    if (ent2A->getConstructors().size()
+                        != ent2B->getConstructors().size())
+                    {
+                        std::cerr
+                            << "single-interface--based service " << name
+                            << " number of constructors changed from "
+                            << ent2A->getConstructors().size() << " to "
+                            << ent2B->getConstructors().size() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::SingleInterfaceBasedServiceEntity::Constructor>::const_iterator
+                             i(ent2A->getConstructors().begin()),
+                             j(ent2B->getConstructors().begin());
+                         i != ent2A->getConstructors().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name || i->parameters != j->parameters
+                            || i->exceptions != j->exceptions
+                            || i->defaultConstructor != j->defaultConstructor)
+                        {
+                            std::cerr
+                                << "single-interface--based service " << name
+                                << " constructor #"
+                                << i - ent2A->getConstructors().begin() + 1
+                                << " changed from "
+                                << (i->defaultConstructor
+                                    ? OUString("default ") : i->name) //TODO: parameters, exceptions
+                                << " to "
+                                << (j->defaultConstructor
+                                    ? OUString("default ") : j->name) //TODO: parameters, exceptions
+                                << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_ACCUMULATION_BASED_SERVICE:
+                {
+                    rtl::Reference<unoidl::AccumulationBasedServiceEntity>
+                        ent2A(
+                            static_cast<unoidl::AccumulationBasedServiceEntity *>(
+                                entA.get()));
+                    rtl::Reference<unoidl::AccumulationBasedServiceEntity>
+                        ent2B(
+                            static_cast<unoidl::AccumulationBasedServiceEntity *>(
+                                entB.get()));
+                    if (ent2A->getDirectMandatoryBaseServices().size()
+                        != ent2B->getDirectMandatoryBaseServices().size())
+                    {
+                        std::cerr
+                            << "accumulation-based service " << name
+                            << (" number of direct mandatory base services"
+                                " changed from ")
+                            << ent2A->getDirectMandatoryBaseServices().size()
+                            << " to "
+                            << ent2B->getDirectMandatoryBaseServices().size()
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::AnnotatedReference>::const_iterator
+                             i(ent2A->getDirectMandatoryBaseServices().begin()),
+                             j(ent2B->getDirectMandatoryBaseServices().begin());
+                         i != ent2A->getDirectMandatoryBaseServices().end();
+                         ++i, ++j)
+                    {
+                        if (i->name != j->name) {
+                            std::cerr
+                                << "accumulation-based service " << name
+                                << " direct mandatory base service #"
+                                << (i
+                                    - (ent2A->getDirectMandatoryBaseServices()
+                                       .begin())
+                                    + 1)
+                                << " changed from " << i->name << " to "
+                                << j->name << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    if (ent2A->getDirectOptionalBaseServices().size()
+                        != ent2B->getDirectOptionalBaseServices().size())
+                    {
+                        std::cerr
+                            << "accumulation-based service " << name
+                            << (" number of direct optional base services"
+                                " changed from ")
+                            << ent2A->getDirectOptionalBaseServices().size()
+                            << " to "
+                            << ent2B->getDirectOptionalBaseServices().size()
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::AnnotatedReference>::const_iterator
+                             i(ent2A->getDirectOptionalBaseServices().begin()),
+                             j(ent2B->getDirectOptionalBaseServices().begin());
+                         i != ent2A->getDirectOptionalBaseServices().end();
+                         ++i, ++j)
+                    {
+                        if (i->name != j->name) {
+                            std::cerr
+                                << "accumulation-based service " << name
+                                << " direct optional base service #"
+                                << (i
+                                    - (ent2A->getDirectOptionalBaseServices()
+                                       .begin())
+                                    + 1)
+                                << " changed from " << i->name << " to "
+                                << j->name << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    if (ent2A->getDirectMandatoryBaseInterfaces().size()
+                        != ent2B->getDirectMandatoryBaseInterfaces().size())
+                    {
+                        std::cerr
+                            << "accumulation-based service " << name
+                            << (" number of direct mandatory base interfaces"
+                                " changed from ")
+                            << ent2A->getDirectMandatoryBaseInterfaces().size()
+                            << " to "
+                            << ent2B->getDirectMandatoryBaseInterfaces().size()
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::AnnotatedReference>::const_iterator
+                             i(ent2A->getDirectMandatoryBaseInterfaces()
+                               .begin()),
+                             j(ent2B->getDirectMandatoryBaseInterfaces()
+                               .begin());
+                         i != ent2A->getDirectMandatoryBaseInterfaces().end();
+                         ++i, ++j)
+                    {
+                        if (i->name != j->name) {
+                            std::cerr
+                                << "accumulation-based service " << name
+                                << " direct mandatory base interface #"
+                                << (i
+                                    - (ent2A->getDirectMandatoryBaseInterfaces()
+                                       .begin())
+                                    + 1)
+                                << " changed from " << i->name << " to "
+                                << j->name << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    if (ent2A->getDirectOptionalBaseInterfaces().size()
+                        != ent2B->getDirectOptionalBaseInterfaces().size())
+                    {
+                        std::cerr
+                            << "accumulation-based service " << name
+                            << (" number of direct optional base interfaces"
+                                " changed from ")
+                            << ent2A->getDirectOptionalBaseInterfaces().size()
+                            << " to "
+                            << ent2B->getDirectOptionalBaseInterfaces().size()
+                            << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::AnnotatedReference>::const_iterator
+                             i(ent2A->getDirectOptionalBaseInterfaces()
+                               .begin()),
+                             j(ent2B->getDirectOptionalBaseInterfaces()
+                               .begin());
+                         i != ent2A->getDirectOptionalBaseInterfaces().end();
+                         ++i, ++j)
+                    {
+                        if (i->name != j->name) {
+                            std::cerr
+                                << "accumulation-based service " << name
+                                << " direct optional base interface #"
+                                << (i
+                                    - (ent2A->getDirectOptionalBaseInterfaces()
+                                       .begin())
+                                    + 1)
+                                << " changed from " << i->name << " to "
+                                << j->name << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    if (ent2A->getDirectProperties().size()
+                        > ent2B->getDirectProperties().size())
+                    {
+                        std::cerr
+                            << "accumulation-based service " << name
+                            << " number of direct properties changed from "
+                            << ent2A->getDirectProperties().size() << " to "
+                            << ent2B->getDirectProperties().size() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    for (std::vector<unoidl::AccumulationBasedServiceEntity::Property>::const_iterator
+                             i(ent2A->getDirectProperties().begin()),
+                             j(ent2B->getDirectProperties().begin());
+                         i != ent2A->getDirectProperties().end(); ++i, ++j)
+                    {
+                        if (i->name != j->name || i->type != j->type
+                            || i->attributes != j->attributes)
+                        {
+                            std::cerr
+                                << "accumulation-based service " << name
+                                << " direct property #"
+                                << i - ent2A->getDirectProperties().begin() + 1
+                                << " changed from "
+                                << i->type << " " << i->name //TODO: attributes
+                                << " to "
+                                << j->type << " " << j->name //TODO: attributes
+                                << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    for (std::vector<unoidl::AccumulationBasedServiceEntity::Property>::const_iterator
+                             i(ent2B->getDirectProperties().begin()
+                               + ent2A->getDirectProperties().size());
+                         i != ent2B->getDirectProperties().end(); ++i)
+                    {
+                        if ((i->attributes & unoidl::AccumulationBasedServiceEntity::Property::ATTRIBUTE_OPTIONAL) == 0)
+                        {
+                            std::cerr
+                                << "B accumulation-based service " << name
+                                << " additional direct property " << i->name
+                                << " is not optional" << std::endl;
+                            std::exit(EXIT_FAILURE);
+                        }
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_INTERFACE_BASED_SINGLETON:
+                {
+                    rtl::Reference<unoidl::InterfaceBasedSingletonEntity> ent2A(
+                        static_cast<unoidl::InterfaceBasedSingletonEntity *>(
+                            entA.get()));
+                    rtl::Reference<unoidl::InterfaceBasedSingletonEntity> ent2B(
+                        static_cast<unoidl::InterfaceBasedSingletonEntity *>(
+                            entB.get()));
+                    if (ent2A->getBase() != ent2B->getBase()) {
+                        std::cerr
+                            << "interface-based singleton " << name
+                            << " base changed from " << ent2A->getBase()
+                            << " to " << ent2B->getBase() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    break;
+                }
+            case unoidl::Entity::SORT_SERVICE_BASED_SINGLETON:
+                {
+                    rtl::Reference<unoidl::ServiceBasedSingletonEntity> ent2A(
+                        static_cast<unoidl::ServiceBasedSingletonEntity *>(
+                            entA.get()));
+                    rtl::Reference<unoidl::ServiceBasedSingletonEntity> ent2B(
+                        static_cast<unoidl::ServiceBasedSingletonEntity *>(
+                            entB.get()));
+                    if (ent2A->getBase() != ent2B->getBase()) {
+                        std::cerr
+                            << "service-based singleton " << name
+                            << " base changed from " << ent2A->getBase()
+                            << " to " << ent2B->getBase() << std::endl;
+                        std::exit(EXIT_FAILURE);
+                    }
+                    break;
+                }
+            }
+        }
+    }
+}
+
+}
+
+SAL_IMPLEMENT_MAIN() {
+    try {
+        sal_uInt32 args = rtl_getAppCommandArgCount();
+        rtl::Reference<unoidl::Manager> mgr[2];
+        mgr[0] = new unoidl::Manager;
+        mgr[1] = new unoidl::Manager;
+        rtl::Reference<unoidl::Provider> prov[2];
+        int side = 0;
+        for (sal_uInt32 i = 0; i != args; ++i) {
+            bool delimiter = false;
+            OUString uri(getArgumentUri(i, side == 0 ? &delimiter : 0));
+            if (delimiter) {
+                side = 1;
+            } else {
+                try {
+                    prov[side] = unoidl::loadProvider(mgr[side], uri);
+                } catch (unoidl::NoSuchFileException &) {
+                    std::cerr
+                        << "Input <" << uri << "> does not exist" << std::endl;
+                    std::exit(EXIT_FAILURE);
+                }
+                mgr[side]->addProvider(prov[side]);
+            }
+        }
+        if (side == 0 || !(prov[0].is() && prov[1].is())) {
+            badUsage();
+        }
+        checkMap(prov[1], "", prov[0]->createRootCursor());
+        return EXIT_SUCCESS;
+    } catch (unoidl::FileFormatException & e1) {
+        std::cerr
+            << "Bad input <" << e1.getUri() << ">: " << e1.getDetail()
+            << std::endl;
+        std::exit(EXIT_FAILURE);
+    }
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */