cppcheck/checkheaders.cpp

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2008-10-26 08:55:15 +01:00
/*
* c++check - c/c++ syntax checking
* Copyright (C) 2007 Daniel Marjamäki
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/
*/
//---------------------------------------------------------------------------
#include "checkheaders.h"
#include "tokenize.h"
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#include <algorithm>
#include <list>
#include <sstream>
#include <string>
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#include <cstring>
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
// HEADERS - No implementation in a header
//---------------------------------------------------------------------------
CheckHeaders::CheckHeaders( const Tokenizer *tokenizer, ErrorLogger *errorLogger )
{
_tokenizer = tokenizer;
_errorLogger = errorLogger;
}
CheckHeaders::~CheckHeaders()
{
}
void CheckHeaders::WarningHeaderWithImplementation()
{
for ( const TOKEN *tok = _tokenizer->tokens(); tok; tok = tok->next())
{
// Only interested in included file
if (tok->fileIndex() == 0)
continue;
if (TOKEN::Match(tok, ") {"))
{
std::ostringstream ostr;
ostr << _tokenizer->fileLine(tok) << ": Found implementation in header";
_errorLogger->reportErr(ostr.str());
// Goto next file..
unsigned int fileindex = tok->fileIndex();
while ( tok->next() && tok->fileIndex() == fileindex )
tok = tok->next();
}
}
}
//---------------------------------------------------------------------------
//---------------------------------------------------------------------------
// HEADERS - Unneeded include
//---------------------------------------------------------------------------
void CheckHeaders::WarningIncludeHeader()
{
// Including..
for ( const TOKEN *includetok = _tokenizer->tokens(); includetok; includetok = includetok->next())
{
if (includetok->str() != "#include")
continue;
// Get fileindex of included file..
unsigned int hfile = 0;
const char *includefile = includetok->next()->aaaa();
while (hfile < _tokenizer->getFiles()->size())
{
if ( Tokenizer::SameFileName( _tokenizer->getFiles()->at(hfile).c_str(), includefile ) )
break;
hfile++;
}
if (hfile == _tokenizer->getFiles()->size())
continue;
// This header is needed if:
// * It contains some needed class declaration
// * It contains some needed function declaration
// * It contains some needed constant value
// * It contains some needed variable
// * It contains some needed enum
std::list<std::string> classlist;
std::list<std::string> namelist;
// Extract classes and names in the header..
int indentlevel = 0;
for ( const TOKEN *tok1 = _tokenizer->tokens(); tok1; tok1 = tok1->next() )
{
if ( tok1->fileIndex() != hfile )
continue;
// I'm only interested in stuff that is declared at indentlevel 0
if (tok1->str() == "{")
++indentlevel;
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else if (tok1->str() == "}")
--indentlevel;
if (indentlevel != 0)
continue;
// Class or namespace declaration..
// --------------------------------------
if (TOKEN::Match(tok1,"class %var% {") || TOKEN::Match(tok1,"class %var% :") || TOKEN::Match(tok1,"namespace %var% {"))
classlist.push_back(tok1->strAt(1));
// Variable declaration..
// --------------------------------------
else if (TOKEN::Match(tok1, "%type% %var% ;") || TOKEN::Match(tok1, "%type% %var% ["))
namelist.push_back(tok1->strAt(1));
else if (TOKEN::Match(tok1, "%type% * %var% ;") || TOKEN::Match(tok1, "%type% * %var% ["))
namelist.push_back(tok1->strAt(2));
else if (TOKEN::Match(tok1, "const %type% %var% =") || TOKEN::Match(tok1, "const %type% %var% ["))
namelist.push_back(tok1->strAt(2));
else if (TOKEN::Match(tok1, "const %type% * %var% =") || TOKEN::Match(tok1, "const %type% * %var% ["))
namelist.push_back(tok1->strAt(3));
// enum..
// --------------------------------------
else if (tok1->str() == "enum")
{
tok1 = tok1->next();
while ( ! TOKEN::Match( tok1, "; %any%" ) )
{
if ( tok1->isName() )
namelist.push_back(tok1->str());
tok1 = tok1->next();
}
}
// function..
// --------------------------------------
else if (TOKEN::Match(tok1,"%type% %var% ("))
namelist.push_back(tok1->strAt(1));
else if (TOKEN::Match(tok1,"%type% * %var% ("))
namelist.push_back(tok1->strAt(2));
else if (TOKEN::Match(tok1,"const %type% %var% ("))
namelist.push_back(tok1->strAt(2));
else if (TOKEN::Match(tok1,"const %type% * %var% ("))
namelist.push_back(tok1->strAt(3));
// typedef..
// --------------------------------------
else if (tok1->str() == "typedef")
{
if (strcmp(tok1->strAt(1),"enum")==0)
continue;
int parlevel = 0;
while (tok1->next())
{
if ( TOKEN::Match(tok1, "[({]") )
parlevel++;
else if ( TOKEN::Match(tok1, "[)}]") )
parlevel--;
else if (parlevel == 0)
{
if ( tok1->str() == ";" )
break;
if ( TOKEN::Match(tok1, "%var% ;") )
namelist.push_back(tok1->str());
}
tok1 = tok1->next();
}
}
}
// Check if the extracted names are used...
bool Needed = false;
bool NeedDeclaration = false;
for ( const TOKEN *tok1 = _tokenizer->tokens(); tok1; tok1 = tok1->next())
{
if (tok1->fileIndex() != includetok->fileIndex())
continue;
if ( TOKEN::Match(tok1, ": %var% {") || TOKEN::Match(tok1, ": %type% %var% {") )
{
std::string classname = tok1->strAt((strcmp(tok1->strAt(2),"{")) ? 2 : 1);
if (std::find(classlist.begin(),classlist.end(),classname)!=classlist.end())
{
Needed = true;
break;
}
}
if ( ! tok1->isName() )
continue;
if (std::find(namelist.begin(),namelist.end(),tok1->aaaa() ) != namelist.end())
{
Needed = true;
break;
}
if ( ! NeedDeclaration )
NeedDeclaration = (std::find(classlist.begin(),classlist.end(),tok1->aaaa() ) != classlist.end());
}
// Not a header file?
if (includetok->fileIndex() == 0)
Needed |= NeedDeclaration;
// Not needed!
if (!Needed)
{
std::ostringstream ostr;
ostr << _tokenizer->fileLine(includetok) << ": The included header '" << includefile << "' is not needed";
if (NeedDeclaration)
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ostr << " (but a forward declaration is needed)";
_errorLogger->reportErr(ostr.str());
}
}
}
//---------------------------------------------------------------------------