cppcheck/tools/errmsg.cpp

/*
 * cppcheck - c/c++ syntax checking
 * Copyright (C) 2007-2009 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam
 *
 * 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 <fstream>
#include <iostream>
#include <list>
#include <string>

class Message
{
private:
    std::string _funcname;
    std::string _msg;
    std::string _par1;
    unsigned int _settings;

    std::string msg(bool code) const;

public:
    Message(std::string funcname, unsigned int settings, std::string msg, std::string par1);

    static const unsigned int ALL = 1;
    static const unsigned int STYLE = 2;

    void generateCode(std::ostream &ostr) const;

    void generateDoc(std::ostream &ostr, unsigned int i) const;
};




int main()
{
    // Error messages..
    std::list<Message> err;

    // checkmemoryleak.cpp..
    err.push_back(Message("memleak", 0, "Memory leak: %1", "varname"));
    err.push_back(Message("resourceLeak", 0, "Resource leak: %1", "varname"));

    // checkother.cpp..
    err.push_back(Message("cstyleCast", Message::STYLE, "C-style pointer casting", ""));
    err.push_back(Message("redundantIfDelete0", Message::STYLE, "Redundant condition. It is safe to deallocate a NULL pointer", ""));
    err.push_back(Message("redundantIfRemove", Message::STYLE, "Redundant condition. The remove function in the STL will not do anything if element doesn't exist", ""));
    err.push_back(Message("dangerousUsageStrtol", 0, "Invalid radix in call to strtol or strtoul. Must be 0 or 2-36", ""));

    // Generate code..
    std::cout << "Generate code.." << std::endl;
    std::ofstream fout("errormessage.h");

    fout << "/*\n";
    fout << " * cppcheck - c/c++ syntax checking\n";
    fout << " * Copyright (C) 2007-2009 Daniel Marjamäki, Reijo Tomperi, Nicolas Le Cam\n";
    fout << " *\n";
    fout << " * This program is free software: you can redistribute it and/or modify\n";
    fout << " * it under the terms of the GNU General Public License as published by\n";
    fout << " * the Free Software Foundation, either version 3 of the License, or\n";
    fout << " * (at your option) any later version.\n";
    fout << " *\n";
    fout << " * This program is distributed in the hope that it will be useful,\n";
    fout << " * but WITHOUT ANY WARRANTY; without even the implied warranty of\n";
    fout << " * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n";
    fout << " * GNU General Public License for more details.\n";
    fout << " *\n";
    fout << " * You should have received a copy of the GNU General Public License\n";
    fout << " * along with this program.  If not, see <http://www.gnu.org/licenses/\n";
    fout << " */\n\n";
    fout << "// THIS FILE IS GENERATED BY MACHINE, SEE ../tools/errmsg.cpp !\n\n";
    fout << "#ifndef errormessageH\n";
    fout << "#define errormessageH\n";
    fout << "#include <string>\n";
    fout << "#include \"settings.h\"\n";
    fout << "class Token;\n";
    fout << "class Tokenizer;\n";
    fout << "class ErrorMessage\n";
    fout << "{\n";
    fout << "private:\n";
    fout << "    ErrorMessage() { }\n";
    fout << "    static std::string msg1(const Tokenizer *tokenizer, const Token *Location);\n";
    fout << "public:\n";
    for (std::list<Message>::const_iterator it = err.begin(); it != err.end(); ++it)
        it->generateCode(fout);
    fout << "};\n";
    fout << "#endif\n";
    std::cout << std::endl;

    // Generate documentation..
    std::cout << "Generate doc.." << std::endl;
    for (unsigned int i = 0; i < 4; ++i)
    {
        const char *suite[4] = { "standard", "all", "style", "all + style" };
        std::cout << "    =" << suite[i] << "=" << std::endl;
        for (std::list<Message>::const_iterator it = err.begin(); it != err.end(); ++it)
            it->generateDoc(std::cout, i);
    }
    std::cout << std::endl;

    return 0;
}





Message::Message(std::string funcname, unsigned int settings, std::string msg, std::string par1)
        : _funcname(funcname), _msg(msg), _par1(par1), _settings(settings)
{ }

std::string Message::msg(bool code) const
{
    const char *str = code ? "\"" : "";
    std::string ret(str + _msg + str);
    if (! _par1.empty())
    {
        std::string::size_type pos = 0;
        while ((pos = ret.find("%1", pos)) != std::string::npos)
        {
            ret.erase(pos, 2);
            if (code)
                ret.insert(pos, "\" + " + _par1 + " + \"");
            else
                ret.insert(pos, _par1);
        }
    }
    return ret;
}

void Message::generateCode(std::ostream &ostr) const
{
    // Error message..
    ostr << "    static std::string " << _funcname << "(const Tokenizer *tokenizer, const Token *Location";
    if (! _par1.empty())
        ostr << ", const std::string &" << _par1;
    ostr << ")\n";
    ostr << "    { return msg1(tokenizer, Location) + " << msg(true) << "; }" << std::endl;

    // Settings..
    ostr << "    static bool " << _funcname << "(const Settings &s)" << std::endl;
    ostr << "    { return ";
    if (_settings == 0)
        ostr << "true";
    else
    {
        if (_settings & ALL)
            ostr << "s._showAll";
        if (_settings & (ALL | STYLE))
            ostr << " & ";
        if (_settings & STYLE)
            ostr << "s._checkCodingStyle";
    }
    ostr << "; }" << std::endl << std::endl;
}

void Message::generateDoc(std::ostream &ostr, unsigned int i) const
{
    if (_settings == i)
    {
        ostr << "    " << msg(false) << std::endl;
    }
}