compilerplugins/clang/oslendian.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
   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
  10 #include <cassert>
  11 #include <memory>
  12
  13 #include "plugin.hxx"
  14
  15 namespace {
  16
  17 class OslEndian: public loplugin::Plugin, public PPCallbacks {
  18 public:
  19     explicit OslEndian(loplugin::InstantiationData const & data): Plugin(data) {
  20         compiler.getPreprocessor().addPPCallbacks(std::unique_ptr<PPCallbacks>(this));
  21     }
  22
  23     enum { isPPCallback = true };
  24
  25 private:
  26     void run() override {}
  27
  28     void MacroDefined(Token const & MacroNameTok, MacroDirective const *)
  29         override
  30     {
  31         auto id = MacroNameTok.getIdentifierInfo()->getName();
  32         if (id == "OSL_BIGENDIAN") {
  33             if (definedLit_.isValid()) {
  34                 report(
  35                     DiagnosticsEngine::Warning,
  36                     "macro %0 defined in addition to 'OSL_LITENDIAN'",
  37                     MacroNameTok.getLocation())
  38                     << MacroNameTok.getIdentifierInfo();
  39                 report(
  40                     DiagnosticsEngine::Note,
  41                     "conflicting macro definition is here", definedLit_);
  42             }
  43             definedBig_ = MacroNameTok.getLocation();
  44             assert(definedBig_.isValid());
  45         } else if (id == "OSL_LITENDIAN") {
  46             if (definedBig_.isValid()) {
  47                 report(
  48                     DiagnosticsEngine::Warning,
  49                     "macro %0 defined in addition to 'OSL_BIGENDIAN'",
  50                     MacroNameTok.getLocation())
  51                     << MacroNameTok.getIdentifierInfo();
  52                 report(
  53                     DiagnosticsEngine::Note,
  54                     "conflicting macro definition is here", definedBig_);
  55             }
  56             definedLit_ = MacroNameTok.getLocation();
  57             assert(definedLit_.isValid());
  58         }
  59     }
  60
  61     void MacroUndefined(
  62         Token const & MacroNameTok, MacroDefinition const &
  63 #if CLANG_VERSION >= 50000
  64         , MacroDirective const *
  65 #endif
  66         ) override
  67     {
  68         auto id = MacroNameTok.getIdentifierInfo()->getName();
  69         if (id == "OSL_BIGENDIAN" || id == "OSL_LITENDIAN") {
  70             report(
  71                 DiagnosticsEngine::Warning, "macro %0 undefinition",
  72                 MacroNameTok.getLocation())
  73                 << MacroNameTok.getIdentifierInfo();
  74         }
  75     }
  76
  77     void Defined(
  78         Token const & MacroNameTok, MacroDefinition const &, SourceRange)
  79         override
  80     {
  81         check(MacroNameTok);
  82     }
  83
  84     void Ifdef(
  85         SourceLocation, Token const & MacroNameTok,
  86         MacroDefinition const &) override
  87     {
  88         check(MacroNameTok);
  89     }
  90
  91     void Ifndef(
  92         SourceLocation, Token const & MacroNameTok,
  93         MacroDefinition const &) override
  94     {
  95         check(MacroNameTok);
  96     }
  97
  98     void check(Token const & macro) const {
  99         auto id = macro.getIdentifierInfo()->getName();
 100         if ((id == "OSL_BIGENDIAN" || id == "OSL_LITENDIAN")
 101             && definedBig_.isInvalid() && definedLit_.isInvalid())
 102         {
 103             report(
 104                 DiagnosticsEngine::Warning,
 105                 "definition of macro %0 checked but 'osl/endian.h' is not"
 106                     " included",
 107                 macro.getLocation())
 108                 << macro.getIdentifierInfo();
 109         }
 110     }
 111
 112     SourceLocation definedBig_;
 113     SourceLocation definedLit_;
 114 };
 115
 116 loplugin::Plugin::Registration<OslEndian> X("oslendian");
 117
 118 }
 119
 120 /* vim:set shiftwidth=4 softtabstop=4 expandtab cinoptions=b1,g0,N-s cinkeys+=0=break: */