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

4 files changed, 211 insertions, 0 deletions

diff --git a/compilerplugins/clang/oslendian.cxx b/compilerplugins/clang/oslendian.cxx
new file mode 100644
index 000000000000..99b2851614be
--- /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 000000000000..7349239aa98d
--- /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 000000000000..76e1a6b38ea9
--- /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 000000000000..90de9643c0d6
--- /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: */