New loplugin:oslendian

...to catch new places where defined'ness of OSL_BIG/LITENDIAN would be checked
without osl/endian.h being included; cf.
e2f08f9def0869460ad38a1c2adb450778290f6e "connectivity, sc: add missing #include
<osl/endian.h>" and 2b14fb3a4f92b928f0a5fc536c6a5f4a6e51a9b8 "cppcanvas, oox:
add missing #include <osl/endian.h>".

Change-Id: I167c8916a01391b7dacad7325153ccf35d3ba9dc
diff --git a/compilerplugins/clang/oslendian.cxx b/compilerplugins/clang/oslendian.cxx
new file mode 100644
index 0000000..99b2851
--- /dev/null
+++ b/compilerplugins/clang/oslendian.cxx
@@ -0,0 +1,116 @@
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * 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 <cassert>

#include "compat.hxx"
#include "plugin.hxx"

namespace {

class OslEndian: public loplugin::Plugin, public PPCallbacks {
public:
    explicit OslEndian(InstantiationData const & data): Plugin(data) {
        compat::addPPCallbacks(compiler.getPreprocessor(), this);
    }

    enum { isPPCallback = true };

private:
    void run() override {}

    void MacroDefined(Token const & MacroNameTok, MacroDirective const *)
        override
    {
        auto id = MacroNameTok.getIdentifierInfo()->getName();
        if (id == "OSL_BIGENDIAN") {
            if (definedLit_.isValid()) {
                report(
                    DiagnosticsEngine::Warning,
                    "macro %0 defined in addition to 'OSL_LITENDIAN'",
                    MacroNameTok.getLocation())
                    << MacroNameTok.getIdentifierInfo();
                report(
                    DiagnosticsEngine::Note,
                    "conflicting macro definition is here", definedLit_);
            }
            definedBig_ = MacroNameTok.getLocation();
            assert(definedBig_.isValid());
        } else if (id == "OSL_LITENDIAN") {
            if (definedBig_.isValid()) {
                report(
                    DiagnosticsEngine::Warning,
                    "macro %0 defined in addition to 'OSL_BIGENDIAN'",
                    MacroNameTok.getLocation())
                    << MacroNameTok.getIdentifierInfo();
                report(
                    DiagnosticsEngine::Note,
                    "conflicting macro definition is here", definedBig_);
            }
            definedLit_ = MacroNameTok.getLocation();
            assert(definedLit_.isValid());
        }
    }

    void MacroUndefined(Token const & MacroNameTok, MacroDefinition const &)
        override
    {
        auto id = MacroNameTok.getIdentifierInfo()->getName();
        if (id == "OSL_BIGENDIAN" || id == "OSL_LITENDIAN") {
            report(
                DiagnosticsEngine::Warning, "macro %0 undefinition",
                MacroNameTok.getLocation())
                << MacroNameTok.getIdentifierInfo();
        }
    }

    void Defined(
        Token const & MacroNameTok, MacroDefinition const &, SourceRange)
        override
    {
        check(MacroNameTok);
    }

    void Ifdef(
        SourceLocation, Token const & MacroNameTok, MacroDefinition const &)
        override
    {
        check(MacroNameTok);
    }

    void Ifndef(
        SourceLocation, Token const & MacroNameTok, MacroDefinition const &)
        override
    {
        check(MacroNameTok);
    }

    void check(Token const & macro) const {
        auto id = macro.getIdentifierInfo()->getName();
        if ((id == "OSL_BIGENDIAN" || id == "OSL_LITENDIAN")
            && definedBig_.isInvalid() && definedLit_.isInvalid())
        {
            report(
                DiagnosticsEngine::Warning,
                "definition of macro %0 checked but 'osl/endian.h' is not"
                    " included",
                macro.getLocation())
                << macro.getIdentifierInfo();
        }
    }

    SourceLocation definedBig_;
    SourceLocation definedLit_;
};

loplugin::Plugin::Registration<OslEndian> X("oslendian");

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/compilerplugins/clang/test/oslendian-1.cxx b/compilerplugins/clang/test/oslendian-1.cxx
new file mode 100644
index 0000000..7349239a
--- /dev/null
+++ b/compilerplugins/clang/test/oslendian-1.cxx
@@ -0,0 +1,47 @@
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * 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 <osl/endian.h>

#if defined OSL_BIGENDIAN || defined OSL_LITENDIAN
#endif
#ifdef OSL_BIGENDIAN
#endif
#ifdef OSL_LITENDIAN
#endif
#ifndef OSL_BIGENDIAN
#endif
#ifndef OSL_LITENDIAN
#endif

#if !defined OSL_BIGENDIAN
#define OSL_BIGENDIAN
    // expected-error@-1 {{macro 'OSL_BIGENDIAN' defined in addition to 'OSL_LITENDIAN' [loplugin:oslendian]}}
    // expected-note@osl/endian.h:* {{conflicting macro definition is here [loplugin:oslendian]}}
#endif

#if !defined OSL_LITENDIAN
#define OSL_LITENDIAN
    // expected-error@-1 {{macro 'OSL_LITENDIAN' defined in addition to 'OSL_BIGENDIAN' [loplugin:oslendian]}}
    // expected-note@osl/endian.h:* {{conflicting macro definition is here [loplugin:oslendian]}}
#endif

#if defined OSL_BIGENDIAN
#undef OSL_BIGENDIAN
    // expected-error@-1 {{macro 'OSL_BIGENDIAN' undefinition [loplugin:oslendian]}}
#endif

#if defined OSL_LITENDIAN
#undef OSL_LITENDIAN
    // expected-error@-1 {{macro 'OSL_LITENDIAN' undefinition [loplugin:oslendian]}}
#endif

/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/compilerplugins/clang/test/oslendian-2.cxx b/compilerplugins/clang/test/oslendian-2.cxx
new file mode 100644
index 0000000..76e1a6b
--- /dev/null
+++ b/compilerplugins/clang/test/oslendian-2.cxx
@@ -0,0 +1,23 @@
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * 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>

#if defined OSL_BIGENDIAN || defined OSL_LITENDIAN // expected-error {{definition of macro 'OSL_BIGENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}} // expected-error {{definition of macro 'OSL_LITENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif
#ifdef OSL_BIGENDIAN // expected-error {{definition of macro 'OSL_BIGENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif
#ifdef OSL_LITENDIAN // expected-error {{definition of macro 'OSL_LITENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif
#ifndef OSL_BIGENDIAN // expected-error {{definition of macro 'OSL_BIGENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif
#ifndef OSL_LITENDIAN // expected-error {{definition of macro 'OSL_LITENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif

/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/compilerplugins/clang/test/oslendian-3.cxx b/compilerplugins/clang/test/oslendian-3.cxx
new file mode 100644
index 0000000..90de964
--- /dev/null
+++ b/compilerplugins/clang/test/oslendian-3.cxx
@@ -0,0 +1,25 @@
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
 * 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>

#if defined OSL_BIGENDIAN || defined OSL_LITENDIAN // expected-error {{definition of macro 'OSL_BIGENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}} // expected-error {{definition of macro 'OSL_LITENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif
#ifdef OSL_BIGENDIAN // expected-error {{definition of macro 'OSL_BIGENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif
#ifdef OSL_LITENDIAN // expected-error {{definition of macro 'OSL_LITENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif
#ifndef OSL_BIGENDIAN // expected-error {{definition of macro 'OSL_BIGENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif
#ifndef OSL_LITENDIAN // expected-error {{definition of macro 'OSL_LITENDIAN' checked but 'osl/endian.h' is not included [loplugin:oslendian]}}
#endif

#include <osl/endian.h>

/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */
diff --git a/solenv/CompilerTest_compilerplugins_clang.mk b/solenv/CompilerTest_compilerplugins_clang.mk
index 3045fba..1258aa6 100644
--- a/solenv/CompilerTest_compilerplugins_clang.mk
+++ b/solenv/CompilerTest_compilerplugins_clang.mk
@@ -12,6 +12,9 @@ $(eval $(call gb_CompilerTest_CompilerTest,compilerplugins_clang))
$(eval $(call gb_CompilerTest_add_exception_objects,compilerplugins_clang, \
    compilerplugins/clang/test/datamembershadow \
    compilerplugins/clang/test/finalprotected \
    compilerplugins/clang/test/oslendian-1 \
    compilerplugins/clang/test/oslendian-2 \
    compilerplugins/clang/test/oslendian-3 \
    compilerplugins/clang/test/salbool \
))