269 lines
9.1 KiB
C++
269 lines
9.1 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2009 Daniel Marjamäki and Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/
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*/
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//---------------------------------------------------------------------------
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#include "checkheaders.h"
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#include "tokenize.h"
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#include "filelister.h"
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#include <algorithm>
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#include <list>
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#include <sstream>
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#include <string>
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#include <cstring>
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// HEADERS - No implementation in a header
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//---------------------------------------------------------------------------
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CheckHeaders::CheckHeaders(const Tokenizer *tokenizer, ErrorLogger *errorLogger)
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{
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_tokenizer = tokenizer;
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_errorLogger = errorLogger;
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}
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CheckHeaders::~CheckHeaders()
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{
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}
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void CheckHeaders::WarningHeaderWithImplementation()
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{
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for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next())
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{
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// Only interested in included file
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if (tok->fileIndex() == 0)
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continue;
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if (Token::simpleMatch(tok, ") {"))
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{
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std::ostringstream ostr;
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ostr << _tokenizer->fileLine(tok) << ": Found implementation in header";
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// TODO, this check is currently not used, but if it is some day
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// it should give correct id and severity by calling proper function
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// from errorLogger. It should not call reportErr directly.
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// std::list<ErrorLogger::ErrorMessage::FileLocation> empty;
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// empty.push_back(FileLocation());
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// _errorLogger->reportErr(empty, "severity", ostr.str(), "id");
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// Goto next file..
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unsigned int fileindex = tok->fileIndex();
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while (tok->next() && tok->fileIndex() == fileindex)
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tok = tok->next();
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}
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}
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}
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//---------------------------------------------------------------------------
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//---------------------------------------------------------------------------
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// HEADERS - Unneeded include
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//---------------------------------------------------------------------------
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void CheckHeaders::WarningIncludeHeader()
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{
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// Including..
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for (const Token *includetok = _tokenizer->tokens(); includetok; includetok = includetok->next())
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{
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if (includetok->str() != "#include")
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continue;
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// Get fileindex of included file..
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unsigned int hfile = 0;
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const char *includefile = includetok->strAt(1);
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while (hfile < _tokenizer->getFiles()->size())
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{
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if (FileLister::SameFileName(_tokenizer->getFiles()->at(hfile).c_str(), includefile))
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break;
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++hfile;
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}
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if (hfile == _tokenizer->getFiles()->size())
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continue;
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// This header is needed if:
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// * It contains some needed class declaration
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// * It contains some needed function declaration
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// * It contains some needed constant value
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// * It contains some needed variable
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// * It contains some needed enum
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std::list<std::string> classlist;
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std::list<std::string> namelist;
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// Extract classes and names in the header..
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int indentlevel = 0;
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for (const Token *tok1 = _tokenizer->tokens(); tok1; tok1 = tok1->next())
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{
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if (tok1->fileIndex() != hfile)
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continue;
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// I'm only interested in stuff that is declared at indentlevel 0
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if (tok1->str() == "{")
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++indentlevel;
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else if (tok1->str() == "}")
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--indentlevel;
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if (indentlevel != 0)
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continue;
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// Class or namespace declaration..
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// --------------------------------------
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if (Token::Match(tok1, "class %var% {") || Token::Match(tok1, "class %var% :") || Token::Match(tok1, "namespace %var% {"))
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classlist.push_back(tok1->strAt(1));
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// Variable declaration..
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// --------------------------------------
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else if (Token::Match(tok1, "%type% %var% ;") || Token::Match(tok1, "%type% %var% ["))
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namelist.push_back(tok1->strAt(1));
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else if (Token::Match(tok1, "%type% * %var% ;") || Token::Match(tok1, "%type% * %var% ["))
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namelist.push_back(tok1->strAt(2));
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else if (Token::Match(tok1, "const %type% %var% =") || Token::Match(tok1, "const %type% %var% ["))
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namelist.push_back(tok1->strAt(2));
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else if (Token::Match(tok1, "const %type% * %var% =") || Token::Match(tok1, "const %type% * %var% ["))
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namelist.push_back(tok1->strAt(3));
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// enum..
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// --------------------------------------
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else if (tok1->str() == "enum")
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{
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tok1 = tok1->next();
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while (! Token::Match(tok1, "; %any%"))
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{
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if (tok1->isName())
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namelist.push_back(tok1->str());
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tok1 = tok1->next();
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}
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}
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// function..
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// --------------------------------------
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else if (Token::Match(tok1, "%type% %var% ("))
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namelist.push_back(tok1->strAt(1));
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else if (Token::Match(tok1, "%type% * %var% ("))
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namelist.push_back(tok1->strAt(2));
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else if (Token::Match(tok1, "const %type% %var% ("))
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namelist.push_back(tok1->strAt(2));
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else if (Token::Match(tok1, "const %type% * %var% ("))
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namelist.push_back(tok1->strAt(3));
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// typedef..
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// --------------------------------------
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else if (tok1->str() == "typedef")
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{
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if (strcmp(tok1->strAt(1), "enum") == 0)
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continue;
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int parlevel = 0;
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while (tok1->next())
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{
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if (Token::Match(tok1, "[({]"))
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++parlevel;
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else if (Token::Match(tok1, "[)}]"))
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--parlevel;
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else if (parlevel == 0)
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{
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if (tok1->str() == ";")
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break;
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if (Token::Match(tok1, "%var% ;"))
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namelist.push_back(tok1->str());
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}
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tok1 = tok1->next();
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}
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}
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}
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// Check if the extracted names are used...
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bool Needed = false;
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bool NeedDeclaration = false;
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for (const Token *tok1 = _tokenizer->tokens(); tok1; tok1 = tok1->next())
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{
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if (tok1->fileIndex() != includetok->fileIndex())
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continue;
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if (Token::Match(tok1, ": %var% {") || Token::Match(tok1, ": %type% %var% {"))
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{
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std::string classname = tok1->strAt((strcmp(tok1->strAt(2), "{")) ? 2 : 1);
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if (std::find(classlist.begin(), classlist.end(), classname) != classlist.end())
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{
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Needed = true;
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break;
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}
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}
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if (! tok1->isName())
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continue;
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if (std::find(namelist.begin(), namelist.end(), tok1->str().c_str()) != namelist.end())
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{
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Needed = true;
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break;
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}
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if (! NeedDeclaration)
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NeedDeclaration = (std::find(classlist.begin(), classlist.end(), tok1->str().c_str()) != classlist.end());
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}
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// Not a header file?
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if (includetok->fileIndex() == 0)
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Needed |= NeedDeclaration;
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// Not needed!
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if (!Needed)
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{
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std::ostringstream ostr;
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ostr << _tokenizer->fileLine(includetok) << ": The included header '" << includefile << "' is not needed";
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if (NeedDeclaration)
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ostr << " (but a forward declaration is needed)";
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// TODO, this check is currently not used, but if it is some day
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// it should give correct id and severity by calling proper function
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// from errorLogger. It should not call reportErr directly.
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// std::list<FileLocation> empty;
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// empty.push_back(FileLocation());
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// _errorLogger->reportErr(empty, "severity", ostr.str(), "id"); // TODO
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}
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}
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}
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//---------------------------------------------------------------------------
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