compilerplugins/clang/colorcheck.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  */
   9 #ifndef LO_CLANG_SHARED_PLUGINS
  10
  11 #include <memory>
  12 #include <cassert>
  13 #include <string>
  14 #include <iostream>
  15 #include <fstream>
  16 #include <set>
  17
  18 #include "check.hxx"
  19 #include "plugin.hxx"
  20
  21 /**
  22 */
  23
  24 namespace
  25 {
  26 class ColorCheck : public loplugin::FilteringPlugin<ColorCheck>
  27 {
  28 public:
  29     explicit ColorCheck(loplugin::InstantiationData const& data)
  30         : FilteringPlugin(data)
  31     {
  32     }
  33
  34     virtual void run() override
  35     {
  36         if (preRun())
  37             TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
  38     }
  39
  40     bool VisitCXXConstructExpr(const CXXConstructExpr*);
  41 };
  42
  43 bool ColorCheck::VisitCXXConstructExpr(const CXXConstructExpr* constructExpr)
  44 {
  45     if (ignoreLocation(constructExpr))
  46         return true;
  47
  48     if (constructExpr->getNumArgs() != 1)
  49         return true;
  50
  51     auto tc = loplugin::TypeCheck(constructExpr->getType());
  52     if (!tc.Class("Color").GlobalNamespace())
  53         return true;
  54
  55     StringRef aFileName = getFilenameOfLocation(
  56         compiler.getSourceManager().getSpellingLoc(compat::getBeginLoc(constructExpr)));
  57     if (loplugin::isSamePathname(aFileName, SRCDIR "/include/tools/color.hxx"))
  58         return true;
  59
  60     const CXXConstructorDecl* constructorDecl = constructExpr->getConstructor();
  61     constructorDecl = constructorDecl->getCanonicalDecl();
  62
  63     if (!loplugin::TypeCheck(constructorDecl->getParamDecl(0)->getType())
  64              .Typedef("sal_uInt32")
  65              .GlobalNamespace())
  66         return true;
  67
  68     auto arg0 = constructExpr->getArg(0);
  69     if (arg0->isCXX11ConstantExpr(compiler.getASTContext()))
  70     {
  71         if (!arg0->isValueDependent())
  72         {
  73             llvm::Optional<llvm::APSInt> xVal
  74                 = compat::getIntegerConstantExpr(arg0, compiler.getASTContext());
  75             if (xVal && *xVal > 0xffffff)
  76                 report(DiagnosticsEngine::Warning,
  77                        "Rather use the ColorTransparency or ColorAlpha version of this constructor",
  78                        arg0->getExprLoc());
  79             return true;
  80         }
  81     }
  82     report(DiagnosticsEngine::Warning,
  83            "Rather use the ColorTransparency or ColorAlpha version of this constructor",
  84            arg0->getExprLoc());
  85
  86     return true;
  87 }
  88
  89 loplugin::Plugin::Registration<ColorCheck> colorcheck("colorcheck");
  90
  91 } // namespace
  92
  93 #endif // LO_CLANG_SHARED_PLUGINS
  94
  95 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */