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/* -*- 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 <algorithm>
#include <cassert>
#include <cstddef>
#include <cstring>
#include <iostream>
#include <fstream>
#include <memory>
#include <set>
#include <vector>
using namespace std;
// Info about a Visit* function in a plugin.
struct VisitFunctionInfo
{
string name;
string argument;
};
// Info about a Traverse* function in a plugin.
struct TraverseFunctionInfo
{
string name;
string argument;
bool hasPre = false;
bool hasPost = false;
};
struct VisitFunctionInfoLess
{
bool operator()( const VisitFunctionInfo& l, const VisitFunctionInfo& r ) const
{
return l.name < r.name;
}
};
struct TraverseFunctionInfoLess
{
bool operator()( const TraverseFunctionInfo& l, const TraverseFunctionInfo& r ) const
{
return l.name < r.name;
}
};
// Information about each LO plugin.
struct PluginInfo
{
string className; // e.g. "BadStatics"
string variableName; // e.g. "badStatics"
string lowercaseName;
bool shouldVisitTemplateInstantiations;
bool shouldVisitImplicitCode;
set< VisitFunctionInfo, VisitFunctionInfoLess > visitFunctions;
set< TraverseFunctionInfo, TraverseFunctionInfoLess > traverseFunctions;
};
// We need separate visitors for shouldVisitTemplateInstantiations and shouldVisitImplicitCode,
// so split plugins into groups by what they should visit.
// It seems that trying to handle the shouldVisit* functionality with just one visitor
// is tricky.
enum PluginType
{
PluginBasic,
PluginVisitTemplates,
PluginVisitImplicit,
PluginVisitTemplatesImplicit,
};
const int Plugin_Begin = PluginBasic;
const int Plugin_End = PluginVisitTemplatesImplicit + 1;
static const char* const pluginTypeNames[ Plugin_End ]
= { "Basic", "VisitTemplates", "VisitImplicit", "VisitTemplatesImplicit" };
static vector< PluginInfo > plugins[ Plugin_End ];
void generateVisitor( PluginType type );
void generate()
{
ostream& output = cout;
output <<
"// This file is autogenerated. Do not modify.\n"
"// Generated by compilerplugins/clang/sharedvisitor/generator.cxx .\n"
"\n"
"#ifdef LO_CLANG_SHARED_PLUGINS\n"
"\n"
"#include <config_clang.h>\n"
"\n"
"#include <clang/AST/ASTContext.h>\n"
"#include <clang/AST/RecursiveASTVisitor.h>\n"
"\n"
"#include \"plugin.hxx\"\n"
"\n";
output << "#undef LO_CLANG_SHARED_PLUGINS // to get sources of individual plugins\n";
for( const auto& pluginGroup : plugins )
for( const PluginInfo& plugin : pluginGroup )
output << "#include \"" << plugin.lowercaseName << ".cxx\"" << endl;
output <<
"\n"
"using namespace clang;\n"
"using namespace llvm;\n"
"\n"
"namespace loplugin\n"
"{\n";
for( int type = Plugin_Begin; type < Plugin_End; ++type )
generateVisitor( static_cast< PluginType >( type ));
output <<
"} // namespace loplugin\n"
"\n"
"#endif // LO_CLANG_SHARED_PLUGINS\n";
};
void generateVisitor( PluginType type )
{
if( plugins[ type ].empty())
return;
ostream& output = cout;
output <<
"\n"
"class SharedRecursiveASTVisitor" << pluginTypeNames[ type ] << "\n"
" : public FilteringPlugin< SharedRecursiveASTVisitor" << pluginTypeNames[ type ] << ">\n"
"{\n"
"public:\n"
" explicit SharedRecursiveASTVisitor" << pluginTypeNames[ type ] << "(const InstantiationData& rData)\n"
" : FilteringPlugin(rData)\n";
for( const PluginInfo& plugin : plugins[ type ] )
output << " , " << plugin.variableName << "( nullptr )\n";
output << " {}\n";
output <<
" virtual bool preRun() override\n"
" {\n";
for( const PluginInfo& plugin : plugins[ type ] )
{
output << " if( " << plugin.variableName << " && !" << plugin.variableName << "->preRun())\n";
// This will disable the plugin for the rest of the run.
output << " " << plugin.variableName << " = nullptr;\n";
}
output <<
" return anyPluginActive();\n"
" }\n";
output <<
" virtual void postRun() override\n"
" {\n";
for( const PluginInfo& plugin : plugins[ type ] )
{
output << " if( " << plugin.variableName << " )\n";
output << " " << plugin.variableName << "->postRun();\n";
}
output <<
" }\n";
output <<
" virtual void run() override {\n"
" if (preRun()) {\n"
" TraverseDecl(compiler.getASTContext().getTranslationUnitDecl());\n"
" postRun();\n"
" }\n"
" }\n"
" enum { isSharedPlugin = true };\n";
output <<
" virtual bool setSharedPlugin( Plugin* plugin, const char* name ) override\n"
" {\n";
bool first = true;
for( const PluginInfo& plugin : plugins[ type ] )
{
output << " ";
if( !first )
output << "else ";
first = false;
output << "if( strcmp( name, \"" << plugin.lowercaseName << "\" ) == 0 )\n";
output << " " << plugin.variableName << " = static_cast< " << plugin.className << "* >( plugin );\n";
}
output <<
" else\n"
" return false;\n"
" return true;\n"
" }\n";
if( type == PluginVisitTemplates || type == PluginVisitTemplatesImplicit )
output << "bool shouldVisitTemplateInstantiations() const { return true; }\n";
if( type == PluginVisitImplicit || type == PluginVisitTemplatesImplicit )
output << "bool shouldVisitImplicitCode() const { return true; }\n";
set< VisitFunctionInfo, VisitFunctionInfoLess > visitFunctions;
for( const PluginInfo& plugin : plugins[ type ] )
for( const VisitFunctionInfo& visit : plugin.visitFunctions )
visitFunctions.insert( visit );
for( const VisitFunctionInfo& visit : visitFunctions )
{
output << " bool " << visit.name << "(" << visit.argument << " arg)\n";
output <<
" {\n"
" if( ignoreLocation( arg ))\n"
" return true;\n";
for( const PluginInfo& plugin : plugins[ type ] )
{
if( plugin.visitFunctions.find( visit ) == plugin.visitFunctions.end())
continue;
output << " if( " << plugin.variableName << " != nullptr ";
output << ")\n";
output << " {\n";
output << " if( !" << plugin.variableName << "->" << visit.name << "( arg ))\n";
// This will disable the plugin for the rest of the run (as would returning false
// from Visit* normally do in the non-shared case).
output << " " << plugin.variableName << " = nullptr;\n";
output << " }\n";
}
output <<
" return anyPluginActive();\n"
" }\n";
}
set< TraverseFunctionInfo, TraverseFunctionInfoLess > traverseFunctions;
for( const PluginInfo& plugin : plugins[ type ] )
for( const TraverseFunctionInfo& traverse : plugin.traverseFunctions )
traverseFunctions.insert( traverse );
for( const TraverseFunctionInfo& traverse : traverseFunctions )
{
output << " bool " << traverse.name << "(" << traverse.argument << " arg)\n";
output << " {\n";
for( const PluginInfo& plugin : plugins[ type ] )
{
auto pluginTraverse = plugin.traverseFunctions.find( traverse );
if( pluginTraverse == plugin.traverseFunctions.end())
continue;
output << " " << plugin.className << "* save" << plugin.className << " = " << plugin.variableName << ";\n";
if( pluginTraverse->hasPre )
{
output << " if( " << plugin.variableName << " != nullptr ";
output << ")\n";
output << " {\n";
output << " if( !" << plugin.variableName << "->Pre" << traverse.name << "( arg ))\n";
// This will disable the plugin for the time of the traverse, until restored later,
// just like directly returning from Traverse* would skip that part.
output << " " << plugin.variableName << " = nullptr;\n";
output << " }\n";
}
}
output << " bool ret = RecursiveASTVisitor::" << traverse.name << "( arg );\n";
for( const PluginInfo& plugin : plugins[ type ] )
{
auto pluginTraverse = plugin.traverseFunctions.find( traverse );
if( pluginTraverse == plugin.traverseFunctions.end())
continue;
if( pluginTraverse->hasPost )
{
output << " if( " << plugin.variableName << " != nullptr ";
output << ")\n";
output << " {\n";
output << " if( !" << plugin.variableName << "->Post" << traverse.name << "( arg, ret ))\n";
// This will disable the plugin for the rest of the run.
output << " save" << plugin.className << " = nullptr;\n";
output << " }\n";
}
output << " " << plugin.variableName << " = save" << plugin.className << ";\n";
}
output << " return ret;\n";
output << " }\n";
}
output <<
"private:\n";
output <<
" bool anyPluginActive() const\n"
" {\n";
first = true;
for( const PluginInfo& plugin : plugins[ type ] )
{
if( first )
output << " return " << plugin.variableName << " != nullptr";
else
output << "\n || " << plugin.variableName << " != nullptr";
first = false;
}
output << ";\n";
output << " }\n";
for( const PluginInfo& plugin : plugins[ type ] )
output << " " << plugin.className << "* " << plugin.variableName << ";\n";
output <<
"};\n"
"\n"
"loplugin::Plugin::Registration< SharedRecursiveASTVisitor" << pluginTypeNames[ type ]
<< " > registration" << pluginTypeNames[ type ] << "(\"sharedvisitor" << pluginTypeNames[ type ] << "\");\n"
"\n";
}
static string getValue( const string& line, const char* tag )
{
size_t taglen = strlen( tag );
if( line.size() < taglen + 2 )
return string();
if( line.compare( 0, taglen, tag ) != 0 )
return string();
if( line[ taglen ] != ':' )
return string();
return line.substr( taglen + 1 );
}
static bool readFile( const string& fileName )
{
ifstream file( fileName );
if( !file )
{
cerr << "Cannot open file " << fileName << endl;
return false;
}
PluginInfo pluginInfo;
string line;
do
{
getline( file, line );
} while( !line.empty() && line[ 0 ] == '#' );
string version = getValue( line, "InfoVersion" );
if( version != "1" )
{
cerr << "Incorrect version '" << version << "'" << endl;
return false;
}
getline( file, line );
pluginInfo.className = getValue( line, "ClassName" );
pluginInfo.variableName = pluginInfo.className;
assert( pluginInfo.variableName.size() > 0 );
pluginInfo.variableName[ 0 ] = tolower( pluginInfo.variableName[ 0 ] );
pluginInfo.lowercaseName = pluginInfo.className;
for( char& c : pluginInfo.lowercaseName )
c = tolower( c );
pluginInfo.shouldVisitTemplateInstantiations = false;
pluginInfo.shouldVisitImplicitCode = false;
bool endOk = false;
for(;;)
{
string line;
getline( file, line );
if( file.eof() || !file )
{
cerr << "Unexpected end of file" << endl;
return false;
}
if( line.empty())
continue;
if( line == "InfoEnd" )
{
endOk = true;
break;
}
else if( line == "VisitFunctionStart" )
{
VisitFunctionInfo visitInfo;
getline( file, line );
visitInfo.name = getValue( line, "VisitFunctionName" );
getline( file, line );
visitInfo.argument = getValue( line, "VisitFunctionArgument" );
getline( file, line );
if( line != "VisitFunctionEnd" )
{
cerr << "Missing VisitFunctionEnd" << endl;
return false;
}
pluginInfo.visitFunctions.insert( move( visitInfo ));
}
else if( line == "TraverseFunctionStart" )
{
TraverseFunctionInfo traverseInfo;
getline( file, line );
traverseInfo.name = getValue( line, "TraverseFunctionName" );
getline( file, line );
traverseInfo.argument = getValue( line, "TraverseFunctionArgument" );
getline( file, line );
traverseInfo.hasPre = getValue( line, "TraverseFunctionHasPre" ) == "1";
getline( file, line );
traverseInfo.hasPost = getValue( line, "TraverseFunctionHasPost" ) == "1";
getline( file, line );
if( line != "TraverseFunctionEnd" )
{
cerr << "Missing TraverseFunctionEnd" << endl;
return false;
}
pluginInfo.traverseFunctions.insert( move( traverseInfo ));
}
else
{
string value;
value = getValue( line, "ShouldVisitTemplateInstantiations" );
if( value == "1" )
pluginInfo.shouldVisitTemplateInstantiations = true;
else
{
value = getValue( line, "ShouldVisitImplicitCode" );
if( value == "1" )
pluginInfo.shouldVisitImplicitCode = true;
else
{
cerr << "Unknown line " << line << endl;
return false;
}
}
}
}
assert( endOk );
(void)endOk;
if( pluginInfo.shouldVisitTemplateInstantiations && pluginInfo.shouldVisitImplicitCode )
plugins[ PluginVisitTemplatesImplicit ].push_back( move( pluginInfo ));
else if( pluginInfo.shouldVisitTemplateInstantiations )
plugins[ PluginVisitTemplates ].push_back( move( pluginInfo ));
else if( pluginInfo.shouldVisitImplicitCode )
plugins[ PluginVisitImplicit ].push_back( move( pluginInfo ));
else
plugins[ PluginBasic ].push_back( move( pluginInfo ));
return true;
}
int main(int argc, char** argv)
{
for( int i = 1 ; i < argc; ++i )
{
if( !readFile( argv[ i ] ))
{
cerr << "Error reading " << argv[ i ] << endl;
return 1;
}
}
for( int type = Plugin_Begin; type < Plugin_End; ++type )
{
sort( plugins[ static_cast< PluginType >( type ) ].begin(), plugins[ static_cast< PluginType >( type ) ].end(),
[]( const PluginInfo& l, const PluginInfo& r ) { return l.className < r.className; } );
}
generate();
return 0;
}
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