summaryrefslogtreecommitdiffstats
path: root/compilerplugins/clang/salunicodeliteral.cxx
diff options
context:
space:
mode:
Diffstat (limited to 'compilerplugins/clang/salunicodeliteral.cxx')
-rw-r--r--compilerplugins/clang/salunicodeliteral.cxx102
1 files changed, 102 insertions, 0 deletions
diff --git a/compilerplugins/clang/salunicodeliteral.cxx b/compilerplugins/clang/salunicodeliteral.cxx
new file mode 100644
index 000000000..aa0a3950c
--- /dev/null
+++ b/compilerplugins/clang/salunicodeliteral.cxx
@@ -0,0 +1,102 @@
+/* -*- 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/.
+ */
+#ifndef LO_CLANG_SHARED_PLUGINS
+
+#include "check.hxx"
+#include "plugin.hxx"
+
+namespace {
+
+bool isAsciiCharacterLiteral(Expr const * expr) {
+ if (auto const e = dyn_cast<CharacterLiteral>(expr)) {
+ return e->getKind() == CharacterLiteral::Ascii;
+ }
+ return false;
+}
+
+class SalUnicodeLiteral final:
+ public loplugin::FilteringPlugin<SalUnicodeLiteral>
+{
+public:
+ explicit SalUnicodeLiteral(loplugin::InstantiationData const & data):
+ FilteringPlugin(data) {}
+
+ bool VisitCXXStaticCastExpr(CXXStaticCastExpr const * expr) {
+ check(expr);
+ return true;
+ }
+
+ bool VisitCXXFunctionalCastExpr(CXXFunctionalCastExpr const * expr) {
+ check(expr);
+ return true;
+ }
+
+ bool VisitCStyleCastExpr(CStyleCastExpr const * expr) {
+ check(expr);
+ return true;
+ }
+
+ bool preRun() override {
+ return compiler.getLangOpts().CPlusPlus
+ && compiler.getPreprocessor().getIdentifierInfo(
+ "LIBO_INTERNAL_ONLY")->hasMacroDefinition();
+ }
+
+ void run() override {
+ if (preRun())
+ TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
+ }
+
+private:
+ void check(ExplicitCastExpr const * expr) {
+ if (ignoreLocation(expr)
+ || isInUnoIncludeFile(expr->getExprLoc()))
+ //TODO: '#ifdef LIBO_INTERNAL_ONLY' within UNO include files
+ {
+ return;
+ }
+ for (auto t = expr->getTypeAsWritten();;) {
+ auto const tt = t->getAs<TypedefType>();
+ if (tt == nullptr) {
+ return;
+ }
+ if (loplugin::TypeCheck(t).Typedef("sal_Unicode")
+ .GlobalNamespace())
+ {
+ break;
+ }
+ t = tt->desugar();
+ }
+ auto const e1 = expr->getSubExprAsWritten();
+ auto const loc = e1->getBeginLoc();
+ if (loc.isMacroID()
+ && compiler.getSourceManager().isAtStartOfImmediateMacroExpansion(
+ loc))
+ {
+ return;
+ }
+ auto const e2 = e1->IgnoreParenImpCasts();
+ if (isAsciiCharacterLiteral(e2) || isa<IntegerLiteral>(e2)) {
+ report(
+ DiagnosticsEngine::Warning,
+ ("in LIBO_INTERNAL_ONLY code, replace literal cast to %0 with a"
+ " u'...' char16_t character literal"),
+ e2->getExprLoc())
+ << expr->getTypeAsWritten() << expr->getSourceRange();
+ }
+ }
+};
+
+static loplugin::Plugin::Registration<SalUnicodeLiteral> salunicodeliteral("salunicodeliteral");
+
+} // namespace
+
+#endif // LO_CLANG_SHARED_PLUGINS
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */