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 "config_clang.h"
  19
  20 #include "check.hxx"
  21 #include "compat.hxx"
  22 #include "plugin.hxx"
  23
  24 /**
  25 */
  26
  27 namespace
  28 {
  29 class ColorCheck : public loplugin::FilteringPlugin<ColorCheck>
  30 {
  31 public:
  32     explicit ColorCheck(loplugin::InstantiationData const& data)
  33         : FilteringPlugin(data)
  34     {
  35     }
  36
  37     virtual void run() override
  38     {
  39         if (preRun())
  40             TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());
  41     }
  42
  43     bool VisitCXXConstructExpr(const CXXConstructExpr*);
  44 };
  45
  46 bool ColorCheck::VisitCXXConstructExpr(const CXXConstructExpr* constructExpr)
  47 {
  48     if (ignoreLocation(constructExpr))
  49         return true;
  50
  51     if (constructExpr->getNumArgs() != 1)
  52         return true;
  53
  54     auto tc = loplugin::TypeCheck(constructExpr->getType());
  55     if (!tc.Class("Color").GlobalNamespace())
  56         return true;
  57
  58     StringRef aFileName = getFilenameOfLocation(
  59         compiler.getSourceManager().getSpellingLoc(constructExpr->getBeginLoc()));
  60     if (loplugin::isSamePathname(aFileName, SRCDIR "/include/tools/color.hxx"))
  61         return true;
  62
  63     const CXXConstructorDecl* constructorDecl = constructExpr->getConstructor();
  64     constructorDecl = constructorDecl->getCanonicalDecl();
  65
  66     if (!loplugin::TypeCheck(constructorDecl->getParamDecl(0)->getType())
  67              .Typedef("sal_uInt32")
  68              .GlobalNamespace())
  69         return true;
  70
  71     auto arg0 = constructExpr->getArg(0);
  72     if (arg0->isCXX11ConstantExpr(compiler.getASTContext()))
  73     {
  74         if (!arg0->isValueDependent())
  75         {
  76             compat::optional<llvm::APSInt> xVal
  77                 = arg0->getIntegerConstantExpr(compiler.getASTContext());
  78             if (xVal && *xVal > 0xffffff)
  79                 report(DiagnosticsEngine::Warning,
  80                        "Rather use the ColorTransparency or ColorAlpha version of this constructor",
  81                        arg0->getExprLoc());
  82             return true;
  83         }
  84     }
  85     report(DiagnosticsEngine::Warning,
  86            "Rather use the ColorTransparency or ColorAlpha version of this constructor",
  87            arg0->getExprLoc());
  88
  89     return true;
  90 }
  91
  92 loplugin::Plugin::Registration<ColorCheck> colorcheck("colorcheck");
  93
  94 } // namespace
  95
  96 #endif // LO_CLANG_SHARED_PLUGINS
  97
  98 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */