1 files changed, 138 insertions, 0 deletions
diff --git a/compilerplugins/clang/convertlong.cxx b/compilerplugins/clang/convertlong.cxx
new file mode 100644
index 000000000..5d2ac82f5
--- /dev/null
+++ b/compilerplugins/clang/convertlong.cxx
@@ -0,0 +1,138 @@
+/* -*- 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 <memory>
+#include <cassert>
+#include <string>
+#include <iostream>
+#include <fstream>
+#include <set>
+#include "plugin.hxx"
+#include "check.hxx"
+
+/**
+  plugin to help to when converting code from
+
+     sal_uIntPtr/sal_uLong/sal_Long/long/unsigned long
+
+  to something more precise.
+ */
+namespace
+{
+class ConvertLong : public loplugin::FilteringPlugin<ConvertLong>
+{
+public:
+    explicit ConvertLong(loplugin::InstantiationData const& data)
+        : FilteringPlugin(data)
+    {
+    }
+
+    virtual void run() override
+    {
+        std::string fn(handler.getMainFileName());
+        loplugin::normalizeDotDotInFilePath(fn);
+        // using sal_uIntPtr as in-between type when converting void* to rtl_TextEncoding
+        if (fn == SRCDIR "/sal/osl/unx/thread.cxx")
+            return;
+        // too much magic
+        if (fn == SRCDIR "/sal/rtl/alloc_arena.cxx")
+            return;
+        if (fn == SRCDIR "/sal/rtl/alloc_cache.cxx")
+            return;
+        // TODO not sure what is going on here
+        if (fn == SRCDIR "/tools/source/generic/bigint.cxx")
+            return;
+        TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
+    }
+
+    bool VisitVarDecl(VarDecl const*);
+    bool TraverseFunctionDecl(FunctionDecl*);
+
+private:
+    bool isInterestingType(QualType qt);
+};
+
+bool ConvertLong::TraverseFunctionDecl(FunctionDecl* functionDecl)
+{
+    // ignore template stuff
+    if (functionDecl->getTemplatedKind() != FunctionDecl::TK_NonTemplate)
+    {
+        return true;
+    }
+    return RecursiveASTVisitor::TraverseFunctionDecl(functionDecl);
+}
+
+bool ConvertLong::VisitVarDecl(VarDecl const* varDecl)
+{
+    if (ignoreLocation(varDecl))
+        return true;
+    StringRef fileName{ getFilenameOfLocation(varDecl->getLocation()) };
+    if (loplugin::isSamePathname(fileName, SRCDIR "/include/tools/bigint.hxx"))
+        return true;
+    if (loplugin::isSamePathname(fileName, SRCDIR "/include/tools/solar.h"))
+        return true;
+    if (!varDecl->hasInit())
+        return true;
+    if (isa<IntegerLiteral>(varDecl->getInit()->IgnoreParenImpCasts()))
+        return true;
+    // ignore int x = -1;
+    if (isa<UnaryOperator>(varDecl->getInit()->IgnoreParenImpCasts()))
+        return true;
+    auto lhsType = varDecl->getType();
+    auto rhsType = varDecl->getInit()->IgnoreParenImpCasts()->getType();
+    if (lhsType.getLocalUnqualifiedType() == rhsType)
+        return true;
+    if (!rhsType.getTypePtrOrNull())
+        return true;
+    if (isInterestingType(rhsType))
+        return true;
+    if (!isInterestingType(lhsType))
+        return true;
+    if (rhsType->isFloatingType()) // TODO
+        return true;
+    report(DiagnosticsEngine::Warning, "rather replace type of decl %0 with %1",
+           varDecl->getLocation())
+        << lhsType << rhsType << varDecl->getSourceRange();
+    //lhsType->dump();
+    //varDecl->dump();
+    return true;
+}
+
+bool ConvertLong::isInterestingType(QualType qt)
+{
+    auto tc = loplugin::TypeCheck(qt);
+    if (tc.Typedef())
+    {
+        TypedefType const* typedefType = qt->getAs<TypedefType>();
+        auto name = typedefType->getDecl()->getName();
+        if (name == "sal_uLong")
+            return true;
+        // because this is a typedef to long on 64-bit Linux
+        if (name == "sal_Int64" || name == "sal_uInt64" || name.find("size_t") != StringRef::npos)
+            return false;
+    }
+    if (isa<AutoType>(qt.getTypePtr()))
+        return false;
+    auto unqual = qt.getUnqualifiedType();
+    if (unqual->isSpecificBuiltinType(BuiltinType::Kind::Long)
+        || unqual->isSpecificBuiltinType(BuiltinType::Kind::ULong))
+    {
+        return true;
+    }
+    if (!tc.Typedef())
+        return false;
+    TypedefType const* typedefType = qt->getAs<TypedefType>();
+    auto name = typedefType->getDecl()->getName();
+    return name == "sal_uIntPtr" || name == "sal_IntPtr";
+}
+
+loplugin::Plugin::Registration<ConvertLong> X("convertlong", false);
+}
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */