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-rw-r--r--compilerplugins/clang/oslendian.cxx133
1 files changed, 133 insertions, 0 deletions
diff --git a/compilerplugins/clang/oslendian.cxx b/compilerplugins/clang/oslendian.cxx
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+++ b/compilerplugins/clang/oslendian.cxx
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+/* -*- 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 <memory>
+
+#include "plugin.hxx"
+
+namespace {
+
+class OslEndian: public loplugin::Plugin, public PPCallbacks {
+public:
+ explicit OslEndian(loplugin::InstantiationData const & data): Plugin(data) {
+ compiler.getPreprocessor().addPPCallbacks(std::unique_ptr<PPCallbacks>(this));
+ }
+
+ enum { isPPCallback = true };
+
+private:
+ void run() override {}
+
+ virtual void FileChanged(SourceLocation, FileChangeReason, SrcMgr::CharacteristicKind, FileID) override {
+ if(!startChecked) {
+ // With precompiled headers MacroDefined() would not be called, so check already at the very
+ // start whether the macros exist.
+ startChecked = true;
+ if(const MacroInfo* macroBig = compiler.getPreprocessor().getMacroInfo(
+ &compiler.getPreprocessor().getIdentifierTable().get("OSL_BIGENDIAN"))) {
+ definedBig_ = macroBig->getDefinitionLoc();
+ }
+ if(const MacroInfo* macroLit = compiler.getPreprocessor().getMacroInfo(
+ &compiler.getPreprocessor().getIdentifierTable().get("OSL_LITENDIAN"))) {
+ definedLit_ = macroLit->getDefinitionLoc();
+ }
+ }
+ }
+
+ 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 &, MacroDirective 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_;
+ bool startChecked = false;
+};
+
+loplugin::Plugin::Registration<OslEndian> X("oslendian");
+
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */