cppcheck/lib/symboldatabase.cpp

/*
 * Cppcheck - A tool for static C/C++ code analysis
 * Copyright (C) 2007-2012 Daniel Marjamäki and Cppcheck team.
 *
 * 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 "symboldatabase.h"

#include "tokenize.h"
#include "token.h"
#include "settings.h"
#include "errorlogger.h"
#include "check.h"

#include <string>
#include <sstream>
#include <climits>

// Define ULLONG_MAX and LLONG_MAX for Borland
#ifdef __BORLANDC__
#define ULLONG_MAX ULONG_MAX
#define LLONG_MAX LONG_MAX
#endif

//---------------------------------------------------------------------------

SymbolDatabase::SymbolDatabase(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
    : _tokenizer(tokenizer), _settings(settings), _errorLogger(errorLogger)
{
    // create global scope
    scopeList.push_back(Scope(this, NULL, NULL));

    // pointer to current scope
    Scope *scope = &scopeList.back();

    // Store current access in each scope (depends on evaluation progress)
    std::map<const Scope*, AccessControl> access;

    // find all scopes
    for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
        // Locate next class
        if (Token::Match(tok, "class|struct|union|namespace %var% [{:]")) {
            scopeList.push_back(Scope(this, tok, scope));

            Scope *new_scope = &scopeList.back();
            if (tok->str() == "class")
                access[new_scope] = Private;
            else if (tok->str() == "struct")
                access[new_scope] = Public;

            const Token *tok2 = tok->tokAt(2);

            // only create base list for classes and structures
            if (new_scope->isClassOrStruct()) {
                // goto initial '{'
                tok2 = new_scope->initBaseInfo(tok);

                // make sure we have valid code
                if (!tok2) {
                    scopeList.pop_back();
                    break;
                }
            }

            new_scope->classStart = tok2;
            new_scope->classEnd = tok2->link();

            // make sure we have valid code
            if (!new_scope->classEnd) {
                scopeList.pop_back();
                break;
            }

            // fill the classAndStructTypes set..
            if (new_scope->isClassOrStruct())
                classAndStructTypes.insert(new_scope->className);

            // make the new scope the current scope
            scope = &scopeList.back();
            scope->nestedIn->nestedList.push_back(scope);

            tok = tok2;
        }

        // Namespace and unknown macro (#3854)
        else if (Token::Match(tok, "namespace %var% %type% (") &&
                 _tokenizer->isCPP() &&
                 tok->tokAt(2)->isUpperCaseName() &&
                 Token::simpleMatch(tok->linkAt(3), ") {")) {
            scopeList.push_back(Scope(this, tok, scope));

            Scope *new_scope = &scopeList.back();
            access[new_scope] = Public;

            const Token *tok2 = tok->linkAt(3)->next();

            new_scope->classStart = tok2;
            new_scope->classEnd = tok2->link();

            // make sure we have valid code
            if (!new_scope->classEnd) {
                scopeList.pop_back();
                break;
            }

            // make the new scope the current scope
            scope = &scopeList.back();
            scope->nestedIn->nestedList.push_back(scope);

            tok = tok2;
        }

        // forward declaration
        else if (Token::Match(tok, "class|struct %var% ;")) {
            // fill the classAndStructTypes set..
            classAndStructTypes.insert(tok->next()->str());

            /** @todo save forward declarations in database someday */
            tok = tok->tokAt(2);
            continue;
        }

        // using namespace
        else if (Token::Match(tok, "using namespace %type% ;|::")) {
            // save location
            scope->usingList.push_back(tok);

            tok = tok->tokAt(3);
        }

        // unnamed struct and union
        else if (Token::Match(tok, "struct|union {") &&
                 Token::Match(tok->next()->link(), "} *|&| %var% ;|[")) {
            scopeList.push_back(Scope(this, tok, scope));

            Scope *new_scope = &scopeList.back();
            access[new_scope] = Public;

            const Token* varNameTok = tok->next()->link()->next();
            if (varNameTok->str() == "*") {
                varNameTok = varNameTok->next();
            } else if (varNameTok->str() == "&") {
                varNameTok = varNameTok->next();
            }

            scope->addVariable(varNameTok, tok, tok, access[scope], new_scope, scope);

            const Token *tok2 = tok->next();

            new_scope->classStart = tok2;
            new_scope->classEnd = tok2->link();

            // make sure we have valid code
            if (!new_scope->classEnd) {
                scopeList.pop_back();
                break;
            }

            // make the new scope the current scope
            scope = &scopeList.back();
            scope->nestedIn->nestedList.push_back(scope);

            tok = tok2;
        }

        // anonymous struct and union
        else if (Token::Match(tok, "struct|union {") &&
                 Token::simpleMatch(tok->next()->link(), "} ;")) {
            scopeList.push_back(Scope(this, tok, scope));

            Scope *new_scope = &scopeList.back();
            access[new_scope] = Public;

            const Token *tok2 = tok->next();

            new_scope->classStart = tok2;
            new_scope->classEnd = tok2->link();

            // make sure we have valid code
            if (!new_scope->classEnd) {
                scopeList.pop_back();
                break;
            }

            // make the new scope the current scope
            scope = &scopeList.back();
            scope->nestedIn->nestedList.push_back(scope);

            tok = tok2;
        }

        else {
            // check for end of scope
            if (tok == scope->classEnd) {
                scope = scope->nestedIn;
                continue;
            }

            // check if in class or structure
            else if (scope->type == Scope::eClass || scope->type == Scope::eStruct) {
                const Token *funcStart = 0;
                const Token *argStart = 0;

                // What section are we in..
                if (tok->str() == "private:")
                    access[scope] = Private;
                else if (tok->str() == "protected:")
                    access[scope] = Protected;
                else if (tok->str() == "public:" || tok->str() == "__published:")
                    access[scope] = Public;
                else if (Token::Match(tok, "public|protected|private %var% :")) {
                    if (tok->str() == "private")
                        access[scope] = Private;
                    else if (tok->str() == "protected")
                        access[scope] = Protected;
                    else
                        access[scope] = Public;

                    tok = tok->tokAt(2);
                }

                // class function?
                else if (tok->previous()->str() != "::" && isFunction(tok, scope, &funcStart, &argStart)) {
                    Function function;

                    // save the function definition argument start '('
                    function.argDef = argStart;

                    // save the access type
                    function.access = access[scope];

                    // save the function name location
                    function.tokenDef = funcStart;

                    // save the function parent scope
                    function.nestedIn = scope;

                    // operator function
                    if (function.tokenDef->str().find("operator") == 0) {
                        function.isOperator = true;

                        // 'operator =' is special
                        if (function.tokenDef->str() == "operator=")
                            function.type = Function::eOperatorEqual;
                    }

                    // class constructor/destructor
                    else if (function.tokenDef->str() == scope->className) {
                        // destructor
                        if (function.tokenDef->previous()->str() == "~")
                            function.type = Function::eDestructor;

                        // copy constructor
                        else if ((Token::Match(function.tokenDef, "%var% ( const %var% & )") ||
                                  Token::Match(function.tokenDef, "%var% ( const %var% & %var% )")) &&
                                 function.tokenDef->strAt(3) == scope->className)
                            function.type = Function::eCopyConstructor;

                        // copy constructor with non-const argument
                        else if ((Token::Match(function.tokenDef, "%var% ( %var% & )") ||
                                  Token::Match(function.tokenDef, "%var% ( %var% & %var% )")) &&
                                 function.tokenDef->strAt(2) == scope->className)
                            function.type = Function::eCopyConstructor;

                        // regular constructor
                        else
                            function.type = Function::eConstructor;

                        if (function.tokenDef->previous()->str() == "explicit")
                            function.isExplicit = true;
                    }

                    // function returning function pointer
                    else if (tok->str() == "(") {
                        function.retFuncPtr = true;
                    }

                    const Token *tok1 = tok;

                    // look for end of previous statement
                    while (tok1->previous() && !Token::Match(tok1->previous(), ";|}|{|public:|protected:|private:")) {
                        // virtual function
                        if (tok1->previous()->str() == "virtual") {
                            function.isVirtual = true;
                            break;
                        }

                        // static function
                        else if (tok1->previous()->str() == "static") {
                            function.isStatic = true;
                            break;
                        }

                        // friend function
                        else if (tok1->previous()->str() == "friend") {
                            function.isFriend = true;
                            break;
                        }

                        tok1 = tok1->previous();
                    }

                    const Token *end;

                    if (!function.retFuncPtr)
                        end = function.argDef->link();
                    else
                        end = tok->link()->next()->link();

                    // const function
                    if (end->next()->str() == "const")
                        function.isConst = true;

                    // pure virtual function
                    if (Token::Match(end, ") const| = %any%"))
                        function.isPure = true;

                    // count the number of constructors
                    if (function.type == Function::eConstructor ||
                        function.type == Function::eCopyConstructor)
                        scope->numConstructors++;

                    // assume implementation is inline (definition and implementation same)
                    function.token = function.tokenDef;
                    function.arg = function.argDef;

                    // out of line function
                    if (Token::Match(end, ") const| ;") ||
                        Token::Match(end, ") const| = %any%")) {
                        // find the function implementation later
                        tok = end->next();

                        scope->functionList.push_back(function);
                    }

                    // inline function
                    else {
                        function.isInline = true;
                        function.hasBody = true;

                        // find start of function '{'
                        while (end && end->str() != "{")
                            end = end->next();
                        if (!end)
                            continue;

                        scope->functionList.push_back(function);

                        const Token *tok2 = funcStart;

                        addNewFunction(&scope, &tok2);
                        if (scope) {
                            scope->functionOf = function.nestedIn;
                            scope->function = &function.nestedIn->functionList.back();
                            scope->function->functionScope = scope;
                        }

                        tok = tok2;
                    }
                }

                // nested class or friend function?
                else if (tok->previous()->str() == "::" && isFunction(tok, scope, &funcStart, &argStart)) {
                    /** @todo check entire qualification for match */
                    Scope * nested = scope->findInNestedListRecursive(tok->strAt(-2));

                    if (nested)
                        addClassFunction(&scope, &tok, argStart);
                    else {
                        /** @todo handle friend functions */
                    }
                }

                // friend class declaration?
                else if (Token::Match(tok, "friend class| %any% ;")) {
                    Scope::FriendInfo friendInfo;

                    friendInfo.name = tok->strAt(1) == "class" ? tok->strAt(2) : tok->strAt(1);
                    // fill this in after parsing is complete
                    friendInfo.scope = 0;

                    scope->friendList.push_back(friendInfo);
                }
            } else if (scope->type == Scope::eNamespace || scope->type == Scope::eGlobal) {
                const Token *funcStart = 0;
                const Token *argStart = 0;

                // function?
                if (isFunction(tok, scope, &funcStart, &argStart)) {
                    // has body?
                    if (Token::Match(argStart->link(), ") const| {|:")) {
                        Scope *old_scope = scope;

                        // class function
                        if (tok->previous() && tok->previous()->str() == "::")
                            addClassFunction(&scope, &tok, argStart);

                        // class destructor
                        else if (tok->previous() && tok->previous()->str() == "~" &&
                                 tok->tokAt(-2) && tok->strAt(-2) == "::")
                            addClassFunction(&scope, &tok, argStart);

                        // regular function
                        else
                            addGlobalFunction(scope, tok, argStart, funcStart);

                        // syntax error
                        if (!scope) {
                            scope = old_scope;
                            break;
                        }
                    }

                    // function returning function pointer with body
                    else if (Token::simpleMatch(argStart->link(), ") ) (") &&
                             Token::Match(argStart->link()->linkAt(2), ") const| {")) {
                        tok = funcStart;
                        Scope *old_scope = scope;

                        // class function
                        if (tok->previous()->str() == "::")
                            addClassFunction(&scope, &tok, argStart);

                        // regular function
                        else {
                            Function* function = addGlobalFunction(scope, tok, argStart, funcStart);
                            function->retFuncPtr = true;
                        }

                        // syntax error?
                        if (!scope) {
                            scope = old_scope;
                            break;
                        }
                    }

                    // function prototype
                    else if (Token::simpleMatch(argStart->link(), ") ;")) {
                        bool newFunc = true; // Is this function already in the database?
                        for (std::list<Function>::const_iterator i = scope->functionList.begin(); i != scope->functionList.end(); ++i) {
                            if (i->tokenDef->str() == tok->str() && Function::argsMatch(scope, i->argDef, argStart, "", 0))
                                newFunc = false;
                        }
                        // save function prototype in database
                        if (newFunc)
                            addGlobalFunctionDecl(scope, argStart, funcStart);

                        tok = argStart->link()->next();
                        continue;
                    }

                    // function returning function pointer prototype
                    else if (Token::simpleMatch(argStart->link(), ") ) (") &&
                             Token::simpleMatch(argStart->link()->linkAt(2), ") ;")) {
                        bool newFunc = true; // Is this function already in the database?
                        for (std::list<Function>::const_iterator i = scope->functionList.begin(); i != scope->functionList.end(); ++i) {
                            if (i->tokenDef->str() == tok->str() && Function::argsMatch(scope, i->argDef, argStart, "", 0))
                                newFunc = false;
                        }
                        // save function prototype in database
                        if (newFunc) {
                            Function* func = addGlobalFunctionDecl(scope, argStart, funcStart);
                            func->retFuncPtr = true;
                        }

                        tok = argStart->link()->linkAt(2)->next();
                        continue;
                    }
                }
            } else if (scope->isExecutable()) {
                if (Token::simpleMatch(tok, "if (") &&
                    Token::simpleMatch(tok->next()->link(), ") {")) {
                    const Token *tok1 = tok->next()->link()->next();
                    scopeList.push_back(Scope(this, tok, scope, Scope::eIf, tok1));
                    tok = tok1;
                    scope = &scopeList.back();
                    scope->nestedIn->nestedList.push_back(scope);
                } else if (Token::simpleMatch(tok, "else {")) {
                    const Token *tok1 = tok->next();
                    scopeList.push_back(Scope(this, tok, scope, Scope::eElse, tok1));
                    tok = tok1;
                    scope = &scopeList.back();
                    scope->nestedIn->nestedList.push_back(scope);
                } else if (Token::simpleMatch(tok, "else if (") &&
                           Token::simpleMatch(tok->linkAt(2), ") {")) {
                    const Token *tok1 = tok->linkAt(2)->next();
                    scopeList.push_back(Scope(this, tok, scope, Scope::eElseIf, tok1));
                    tok = tok1;
                    scope = &scopeList.back();
                    scope->nestedIn->nestedList.push_back(scope);
                } else if (Token::simpleMatch(tok, "for (") &&
                           Token::simpleMatch(tok->next()->link(), ") {")) {
                    // save location of initialization
                    const Token *tok1 = tok->next()->link()->next();
                    const Token *tok2 = tok->tokAt(2);
                    scopeList.push_back(Scope(this, tok, scope, Scope::eFor, tok1));
                    tok = tok1;
                    scope = &scopeList.back();
                    scope->nestedIn->nestedList.push_back(scope);
                    // check for variable declaration and add it to new scope if found
                    scope->checkVariable(tok2, Local);
                } else if (Token::simpleMatch(tok, "while (") &&
                           Token::simpleMatch(tok->next()->link(), ") {")) {
                    const Token *tok1 = tok->next()->link()->next();
                    scopeList.push_back(Scope(this, tok, scope, Scope::eWhile, tok1));
                    tok = tok1;
                    scope = &scopeList.back();
                    scope->nestedIn->nestedList.push_back(scope);
                } else if (Token::simpleMatch(tok, "do {")) {
                    const Token *tok1 = tok->next();
                    scopeList.push_back(Scope(this, tok, scope, Scope::eDo, tok1));
                    tok = tok1;
                    scope = &scopeList.back();
                    scope->nestedIn->nestedList.push_back(scope);
                } else if (Token::simpleMatch(tok, "switch (") &&
                           Token::simpleMatch(tok->next()->link(), ") {")) {
                    const Token *tok1 = tok->next()->link()->next();
                    scopeList.push_back(Scope(this, tok, scope, Scope::eSwitch, tok1));
                    tok = tok1;
                    scope = &scopeList.back();
                    scope->nestedIn->nestedList.push_back(scope);
                } else if (Token::simpleMatch(tok, "try {")) {
                    const Token *tok1 = tok->next();
                    scopeList.push_back(Scope(this, tok, scope, Scope::eTry, tok1));
                    tok = tok1;
                    scope = &scopeList.back();
                    scope->nestedIn->nestedList.push_back(scope);
                } else if (Token::simpleMatch(tok, "catch (") &&
                           Token::simpleMatch(tok->next()->link(), ") {")) {
                    const Token *tok1 = tok->next()->link()->next();
                    const Token *tok2 = tok->tokAt(2);
                    scopeList.push_back(Scope(this, tok, scope, Scope::eCatch, tok1));
                    tok = tok1;
                    scope = &scopeList.back();
                    scope->nestedIn->nestedList.push_back(scope);
                    // check for variable declaration and add it to new scope if found
                    scope->checkVariable(tok2, Throw);
                } else if (tok->str() == "{") {
                    if (!Token::Match(tok->previous(), "=|,")) {
                        scopeList.push_back(Scope(this, tok, scope, Scope::eUnconditional, tok));
                        scope = &scopeList.back();
                        scope->nestedIn->nestedList.push_back(scope);
                    } else {
                        tok = tok->link();
                    }
                }
            }
        }
    }

    std::list<Scope>::iterator it;

    // fill in base class info
    for (it = scopeList.begin(); it != scopeList.end(); ++it) {
        scope = &(*it);

        // skip namespaces and functions
        if (!scope->isClassOrStruct())
            continue;

        // finish filling in base class info
        for (unsigned int i = 0; i < scope->derivedFrom.size(); ++i) {
            std::list<Scope>::const_iterator it1;

            // check all scopes for match
            for (it1 = scopeList.begin(); it1 != scopeList.end(); ++it1) {
                // check scope for match
                const Scope *scope1 = it1->findQualifiedScope(scope->derivedFrom[i].name);

                // found match?
                if (scope1) {
                    // set found scope
                    scope->derivedFrom[i].scope = const_cast<Scope *>(scope1);
                    break;
                }
            }
        }
    }

    // fill in friend info
    for (it = scopeList.begin(); it != scopeList.end(); ++it) {
        for (std::list<Scope::FriendInfo>::iterator i = it->friendList.begin(); i != it->friendList.end(); ++i) {
            for (std::list<Scope>::iterator j = scopeList.begin(); j != scopeList.end(); ++j) {
                // check scope for match
                scope = const_cast<Scope*>(j->findQualifiedScope(i->name));

                // found match?
                if (scope && scope->isClassOrStruct()) {
                    // set found scope
                    i->scope = scope;
                    break;
                }
            }
        }
    }

    // fill in variable info
    for (it = scopeList.begin(); it != scopeList.end(); ++it) {
        // find variables
        it->getVariableList();
    }

    // fill in function arguments
    for (it = scopeList.begin(); it != scopeList.end(); ++it) {
        std::list<Function>::iterator func;

        for (func = it->functionList.begin(); func != it->functionList.end(); ++func) {
            // add arguments
            func->addArguments(this, scope);
        }
    }

    // fill in function scopes
    for (it = scopeList.begin(); it != scopeList.end(); ++it) {
        if (it->type == Scope::eFunction)
            functionScopes.push_back(&*it);
    }

    // fill in class and struct scopes
    for (it = scopeList.begin(); it != scopeList.end(); ++it) {
        if (it->isClassOrStruct())
            classAndStructScopes.push_back(&*it);
    }

    // determine if user defined type needs initialization
    unsigned int unknowns = 0; // stop checking when there are no unknowns
    unsigned int retry = 0;    // bail if we don't resolve all the variable types for some reason

    do {
        unknowns = 0;

        for (it = scopeList.begin(); it != scopeList.end(); ++it) {
            scope = &(*it);

            if (scope->isClassOrStruct() && scope->needInitialization == Scope::Unknown) {
                // check for default constructor
                bool hasDefaultConstructor = false;

                std::list<Function>::const_iterator func;

                for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
                    if (func->type == Function::eConstructor) {
                        // check for no arguments: func ( )
                        if (func->argCount() == 0) {
                            hasDefaultConstructor = true;
                            break;
                        }

                        /** check for arguments with default values */
                        else if (func->argCount() == func->initializedArgCount()) {
                            hasDefaultConstructor = true;
                            break;
                        }
                    }
                }

                // User defined types with user defined default constructor doesn't need initialization.
                // We assume the default constructor initializes everything.
                // Another check will figure out if the constructor actually initializes everything.
                if (hasDefaultConstructor)
                    scope->needInitialization = Scope::False;

                // check each member variable to see if it needs initialization
                else {
                    bool needInitialization = false;
                    bool unknown = false;

                    std::list<Variable>::const_iterator var;
                    for (var = scope->varlist.begin(); var != scope->varlist.end(); ++var) {
                        if (var->isClass()) {
                            if (var->type()) {
                                // does this type need initialization?
                                if (var->type()->needInitialization == Scope::True)
                                    needInitialization = true;
                                else if (var->type()->needInitialization == Scope::Unknown)
                                    unknown = true;
                            }
                        } else
                            needInitialization = true;
                    }

                    if (!unknown) {
                        if (needInitialization)
                            scope->needInitialization = Scope::True;
                        else
                            scope->needInitialization = Scope::False;
                    }

                    if (scope->needInitialization == Scope::Unknown)
                        unknowns++;
                }
            } else if (scope->type == Scope::eUnion && scope->needInitialization == Scope::Unknown)
                scope->needInitialization = Scope::True;
        }

        retry++;
    } while (unknowns && retry < 100);

    // this shouldn't happen so output a debug warning
    if (retry == 100 && _settings->debugwarnings) {
        for (it = scopeList.begin(); it != scopeList.end(); ++it) {
            scope = &(*it);

            if (scope->isClassOrStruct() && scope->needInitialization == Scope::Unknown)
                debugMessage(scope->classDef, "SymbolDatabase::SymbolDatabase couldn't resolve all user defined types.");
        }
    }

    // create variable symbol table
    _variableList.resize(_tokenizer->varIdCount() + 1);
    std::fill_n(_variableList.begin(), _variableList.size(), (const Variable*)NULL);

    // check all scopes for variables
    for (it = scopeList.begin(); it != scopeList.end(); ++it) {
        scope = &(*it);

        // add all variables
        std::list<Variable>::const_iterator var;
        for (var = scope->varlist.begin(); var != scope->varlist.end(); ++var) {
            unsigned int varId = var->varId();
            if (varId)
                _variableList[varId] = &(*var);
        }

        // add all function paramaters
        std::list<Function>::const_iterator func;
        for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
            // ignore function without implementations
            if (!func->hasBody)
                continue;

            std::list<Variable>::const_iterator arg;
            for (arg = func->argumentList.begin(); arg != func->argumentList.end(); ++arg) {
                // check for named parameters
                if (arg->nameToken() && arg->varId()) {
                    unsigned int varId = arg->varId();
                    if (varId)
                        _variableList[varId] = &(*arg);
                }
            }
        }
    }

    /* set all unknown array dimensions that are set by a variable to the maximum size of that variable type */
    for (std::size_t i = 1; i <= _tokenizer->varIdCount(); i++) {
        // check each array variable
        if (_variableList[i] && _variableList[i]->isArray()) {
            // check each array dimension
            for (std::size_t j = 0; j < _variableList[i]->dimensions().size(); j++) {
                Dimension &dimension = const_cast<Dimension &>(_variableList[i]->dimensions()[j]);
                // check for a single token dimension that is a variable
                if (dimension.num == 0) {
                    dimension.known = false;
                    if (!dimension.start || (dimension.start != dimension.end) || !dimension.start->varId())
                        continue;

                    // get maximum size from type
                    // find where this type is defined
                    const Variable *var = getVariableFromVarId(dimension.start->varId());

                    // make sure it is in the database
                    if (!var)
                        break;

                    // get type token
                    const Token *index_type = var->typeEndToken();

                    if (index_type->str() == "char") {
                        if (index_type->isUnsigned())
                            dimension.num = UCHAR_MAX + 1;
                        else if (index_type->isSigned())
                            dimension.num = SCHAR_MAX + 1;
                        else
                            dimension.num = CHAR_MAX + 1;
                    } else if (index_type->str() == "short") {
                        if (index_type->isUnsigned())
                            dimension.num = USHRT_MAX + 1;
                        else
                            dimension.num = SHRT_MAX + 1;
                    }

                    // checkScope assumes size is signed int so we limit the following sizes to INT_MAX
                    else if (index_type->str() == "int") {
                        if (index_type->isUnsigned())
                            dimension.num = UINT_MAX + 1ULL;
                        else
                            dimension.num = INT_MAX + 1ULL;
                    } else if (index_type->str() == "long") {
                        if (index_type->isUnsigned()) {
                            if (index_type->isLong())
                                dimension.num = ULLONG_MAX; // should be ULLONG_MAX + 1ULL
                            else
                                dimension.num = ULONG_MAX; // should be ULONG_MAX + 1ULL
                        } else {
                            if (index_type->isLong())
                                dimension.num = LLONG_MAX; // should be LLONG_MAX + 1LL
                            else
                                dimension.num = LONG_MAX;  // should be LONG_MAX + 1LL
                        }
                    }
                }
            }
        }
    }
}

bool SymbolDatabase::isFunction(const Token *tok, const Scope* outerScope, const Token **funcStart, const Token **argStart)
{
    // function returning function pointer? '... ( ... %var% ( ... ))( ... ) {'
    if (tok->str() == "(" &&
        tok->link()->previous()->str() == ")" &&
        tok->link()->next() &&
        tok->link()->next()->str() == "(" &&
        tok->link()->next()->link()->next() &&
        Token::Match(tok->link()->next()->link()->next(), "{|;|const|=")) {
        *funcStart = tok->link()->previous()->link()->previous();
        *argStart = tok->link()->previous()->link();
        return true;
    }

    // regular function?
    else if (Token::Match(tok, "%var% (") && tok->previous() &&
             (tok->previous()->isName() || tok->strAt(-1) == ">" || tok->strAt(-1) == "&" || tok->strAt(-1) == "*" || // Either a return type in front of tok
              tok->strAt(-1) == "::" || tok->strAt(-1) == "~" || // or a scope qualifier in front of tok
              outerScope->isClassOrStruct()) && // or a ctor/dtor
             (Token::Match(tok->next()->link(), ") const| ;|{|=") ||
              Token::Match(tok->next()->link(), ") : ::| %var% (|::"))) {
        *funcStart = tok;
        *argStart = tok->next();
        return true;
    }

    return false;
}

void Variable::evaluate()
{
    const Token* tok = _start;
    while (tok && tok->previous() && tok->previous()->isName())
        tok = tok->previous();
    for (const Token* const end = _name?_name:_end; tok != end;) {
        if (tok->str() == "static")
            setFlag(fIsStatic, true);
        else if (tok->str() == "extern")
            setFlag(fIsExtern, true);
        else if (tok->str() == "mutable")
            setFlag(fIsMutable, true);
        else if (tok->str() == "const")
            setFlag(fIsConst, true);
        else if (tok->str() == "*") {
            setFlag(fIsPointer, true);
            setFlag(fIsConst, false); // Points to const, isn't necessarily const itself
        } else if (tok->str() == "&")
            setFlag(fIsReference, true);

        if (tok->str() == "<")
            tok->findClosingBracket(tok);
        else
            tok = tok->next();
    }

    while (_start && _start->next() && (_start->str() == "static" || _start->str() == "const"))
        _start = _start->next();
    while (_end && _end->previous() && _end->str() == "const")
        _end = _end->previous();

    if (_name)
        setFlag(fIsArray, arrayDimensions(_dimensions, _name->next()));
    if (_start)
        setFlag(fIsClass, !_start->isStandardType() && !isPointer() && !isReference());
    if (_access == Argument) {
        tok = _name;
        if (!tok)
            tok = _end; // Argument without name
        if (!tok)
            return;
        tok = tok->next();
        while (tok->str() == "[")
            tok = tok->link();
        setFlag(fHasDefault, tok->str() == "=");
    }
}

bool Function::argsMatch(const Scope *scope, const Token *first, const Token *second, const std::string &path, unsigned int depth)
{
    while (first->str() == second->str()) {
        // at end of argument list
        if (first->str() == ")") {
            return true;
        }

        // skip default value assignment
        else if (first->next()->str() == "=") {
            first = first->nextArgument();

            if (second->next()->str() == "=") {
                second = second->nextArgument();
                if (!first || !second) { // End of argument list (first or second)
                    return !first && !second;
                }
            } else if (!first) { // End of argument list (first)
                return second->next() && second->next()->str() == ")";
            }
        }

        // definition missing variable name
        else if (first->next()->str() == "," && second->next()->str() != ",")
            second = second->next();
        else if (first->next()->str() == ")" && second->next()->str() != ")")
            second = second->next();

        // function missing variable name
        else if (second->next()->str() == "," && first->next()->str() != ",")
            first = first->next();
        else if (second->next()->str() == ")" && first->next()->str() != ")")
            first = first->next();

        // argument list has different number of arguments
        else if (second->str() == ")")
            break;

        // variable names are different
        else if ((Token::Match(first->next(), "%var% ,|)|=") &&
                  Token::Match(second->next(), "%var% ,|)")) &&
                 (first->next()->str() != second->next()->str())) {
            // skip variable names
            first = first->next();
            second = second->next();
        }

        // variable with class path
        else if (depth && Token::Match(first->next(), "%var%")) {
            std::string param = path + first->next()->str();

            if (Token::Match(second->next(), param.c_str())) {
                second = second->tokAt(int(depth) * 2);
            } else if (depth > 1) {
                std::string short_path = path;

                // remove last " :: "
                short_path.resize(short_path.size() - 4);

                // remove last name
                while (!short_path.empty() && short_path[short_path.size() - 1] != ' ')
                    short_path.resize(short_path.size() - 1);

                param = short_path + first->next()->str();
                if (Token::Match(second->next(), param.c_str())) {
                    second = second->tokAt((int(depth) - 1) * 2);
                }
            }
        }

        // nested class variable
        else if (depth == 0 && Token::Match(first->next(), "%var%") &&
                 second->next()->str() == scope->className && second->strAt(2) == "::" &&
                 first->next()->str() == second->strAt(3)) {
            second = second->tokAt(2);
        }

        first = first->next();
        second = second->next();
    }

    return false;
}

Function* SymbolDatabase::addGlobalFunction(Scope*& scope, const Token*& tok, const Token *argStart, const Token* funcStart)
{
    Function* function = 0;
    for (std::list<Function>::iterator i = scope->functionList.begin(); i != scope->functionList.end(); ++i) {
        if (i->tokenDef->str() == tok->str() && Function::argsMatch(scope, i->argDef->next(), argStart->next(), "", 0))
            function = &*i;
    }

    if (!function)
        function = addGlobalFunctionDecl(scope, argStart, funcStart);

    function->arg = argStart;
    function->token = funcStart;
    function->hasBody = true;

    addNewFunction(&scope, &tok);

    if (scope) {
        scope->function = function;
        function->functionScope = scope;
        return function;
    }
    return 0;
}

Function* SymbolDatabase::addGlobalFunctionDecl(Scope*& scope, const Token *argStart, const Token* funcStart)
{
    Function function;

    // save the function definition argument start '('
    function.argDef = argStart;

    // save the access type
    function.access = Public;

    // save the function name location
    function.tokenDef = funcStart;

    function.isInline = false;
    function.hasBody = false;
    function.type = Function::eFunction;
    function.nestedIn = scope;

    scope->functionList.push_back(function);
    return &scope->functionList.back();
}

void SymbolDatabase::addClassFunction(Scope **scope, const Token **tok, const Token *argStart)
{
    int count = 0;
    std::string path;
    unsigned int path_length = 0;
    const Token *tok1;

    const bool destructor((*tok)->previous()->str() == "~");

    // skip class/struct name
    if (destructor)
        tok1 = (*tok)->tokAt(-3);
    else
        tok1 = (*tok)->tokAt(-2);

    // syntax error?
    if (!tok1)
        return;

    // back up to head of path
    while (tok1 && tok1->previous() && tok1->previous()->str() == "::") {
        path = tok1->str() + " :: " + path;
        tok1 = tok1->tokAt(-2);
        count++;
        path_length++;
    }

    if (tok1 && count) {
        path = tok1->str() + " :: " + path;
        path_length++;
    }

    std::list<Scope>::iterator it1;

    // search for match
    for (it1 = scopeList.begin(); it1 != scopeList.end(); ++it1) {
        Scope *scope1 = &(*it1);

        bool match = false;
        if (scope1->className == tok1->str() && (scope1->type != Scope::eFunction)) {
            // do the scopes match (same scope) or do their names match (multiple namespaces)
            if ((*scope == scope1->nestedIn) || (*scope && scope1 &&
                                                 (*scope)->className == scope1->nestedIn->className &&
                                                 !(*scope)->className.empty() &&
                                                 (*scope)->type == scope1->nestedIn->type)) {

                // nested scopes => check that they match
                {
                    const Scope *s1 = *scope;
                    const Scope *s2 = scope1->nestedIn;
                    while (s1 && s2) {
                        if (s1->className != s2->className)
                            break;
                        s1 = s1->nestedIn;
                        s2 = s2->nestedIn;
                    }
                    // Not matching scopes
                    if (s1 || s2)
                        continue;
                }

                Scope *scope2 = scope1;

                while (scope2 && count > 0) {
                    count--;
                    tok1 = tok1->tokAt(2);
                    scope2 = scope2->findInNestedList(tok1->str());
                }

                if (count == 0 && scope2) {
                    match = true;
                    scope1 = scope2;
                }
            }
        }

        if (match) {
            std::list<Function>::iterator func;

            for (func = scope1->functionList.begin(); func != scope1->functionList.end(); ++func) {
                if (!func->hasBody && func->tokenDef->str() == (*tok)->str()) {
                    if (Function::argsMatch(scope1, func->argDef, (*tok)->next(), path, path_length)) {
                        if (func->type == Function::eDestructor && destructor) {
                            func->hasBody = true;
                        } else if (func->type != Function::eDestructor && !destructor) {
                            // normal function?
                            if (!func->retFuncPtr && (*tok)->next()->link()) {
                                if ((func->isConst && (*tok)->next()->link()->next()->str() == "const") ||
                                    (!func->isConst && (*tok)->next()->link()->next()->str() != "const")) {
                                    func->hasBody = true;
                                }
                            }

                            // function returning function pointer?
                            else if (func->retFuncPtr) {
                                // todo check for const
                                func->hasBody = true;
                            }
                        }

                        if (func->hasBody) {
                            func->token = *tok;
                            func->arg = argStart;
                            addNewFunction(scope, tok);
                            if (*scope) {
                                (*scope)->functionOf = scope1;
                                (*scope)->function = &*func;
                                (*scope)->function->functionScope = *scope;
                            }
                            return;
                        }
                    }
                }
            }
        }
    }

    // class function of unknown class
    addNewFunction(scope, tok);
}

void SymbolDatabase::addNewFunction(Scope **scope, const Token **tok)
{
    const Token *tok1 = *tok;
    scopeList.push_back(Scope(this, tok1, *scope));
    Scope *new_scope = &scopeList.back();

    // skip to start of function
    while (tok1 && tok1->str() != "{") {
        if (tok1->str() == "(")
            tok1 = tok1->link();
        tok1 = tok1->next();
    }

    if (tok1) {
        new_scope->classStart = tok1;
        new_scope->classEnd = tok1->link();

        // syntax error?
        if (!new_scope->classEnd) {
            scopeList.pop_back();
            while (tok1->next())
                tok1 = tok1->next();
            *scope = NULL;
            *tok = tok1;
            return;
        }

        *scope = new_scope;
        *tok = tok1;
        (*scope)->nestedIn->nestedList.push_back(*scope);
    } else {
        scopeList.pop_back();
        *scope = NULL;
        *tok = NULL;
    }
}

const Token *Scope::initBaseInfo(const Token *tok)
{
    // goto initial '{'
    const Token *tok2 = tok->tokAt(2);
    while (tok2 && tok2->str() != "{") {
        // skip unsupported templates
        if (tok2->str() == "<")
            tok2->findClosingBracket(tok2);

        // check for base classes
        else if (Token::Match(tok2, ":|,")) {
            Scope::BaseInfo base;

            base.isVirtual = false;

            tok2 = tok2->next();

            // check for invalid code
            if (!tok2 || !tok2->next())
                return NULL;

            if (tok2->str() == "virtual") {
                base.isVirtual = true;
                tok2 = tok2->next();
            }

            if (tok2->str() == "public") {
                base.access = Public;
                tok2 = tok2->next();
            } else if (tok2->str() == "protected") {
                base.access = Protected;
                tok2 = tok2->next();
            } else if (tok2->str() == "private") {
                base.access = Private;
                tok2 = tok2->next();
            } else {
                if (tok->str() == "class")
                    base.access = Private;
                else if (tok->str() == "struct")
                    base.access = Public;
            }

            if (tok2->str() == "virtual") {
                base.isVirtual = true;
                tok2 = tok2->next();
            }

            // handle global namespace
            if (tok2->str() == "::") {
                base.name = ":: ";
                tok2 = tok2->next();
            }

            // handle derived base classes
            while (Token::Match(tok2, "%var% ::")) {
                base.name += tok2->str();
                base.name += " :: ";
                tok2 = tok2->tokAt(2);
            }

            base.name += tok2->str();
            base.scope = NULL;

            // add unhandled templates
            if (tok2->next() && tok2->next()->str() == "<") {
                tok2 = tok2->next();
                base.name += tok2->str();

                int level1 = 1;
                while (tok2->next()) {
                    base.name += tok2->next()->str();

                    if (tok2->next()->str() == ">") {
                        level1--;
                        if (level1 == 0)
                            break;
                    } else if (tok2->next()->str() == "<")
                        level1++;

                    tok2 = tok2->next();
                }
            }

            // save pattern for base class name
            derivedFrom.push_back(base);
        }
        tok2 = tok2->next();
    }

    return tok2;
}

void SymbolDatabase::debugMessage(const Token *tok, const std::string &msg) const
{
    if (tok && _settings->debugwarnings) {
        const std::list<const Token*> locationList(1, tok);
        const ErrorLogger::ErrorMessage errmsg(locationList, &_tokenizer->list,
                                               Severity::debug,
                                               "debug",
                                               msg,
                                               false);
        if (_errorLogger)
            _errorLogger->reportErr(errmsg);
    }
}

bool Variable::arrayDimensions(std::vector<Dimension> &dimensions, const Token *tok)
{
    bool isArray = false;

    const Token *dim = tok;

    while (dim && dim->next() && dim->str() == "[") {
        Dimension dimension;
        // check for empty array dimension []
        if (dim->next()->str() != "]") {
            dimension.start = dim->next();
            dimension.end = dim->link()->previous();
            if (dimension.start == dimension.end && dimension.start->isNumber())
                dimension.num = MathLib::toLongNumber(dimension.start->str());
        }
        dimensions.push_back(dimension);
        dim = dim->link()->next();
        isArray = true;
    }
    return isArray;
}

static std::ostream & operator << (std::ostream & s, Scope::ScopeType type)
{
    s << (type == Scope::eGlobal ? "Global" :
          type == Scope::eClass ? "Class" :
          type == Scope::eStruct ? "Struct" :
          type == Scope::eUnion ? "Union" :
          type == Scope::eNamespace ? "Namespace" :
          type == Scope::eFunction ? "Function" :
          type == Scope::eIf ? "If" :
          type == Scope::eElse ? "Else" :
          type == Scope::eElseIf ? "ElseIf" :
          type == Scope::eFor ? "For" :
          type == Scope::eWhile ? "While" :
          type == Scope::eDo ? "Do" :
          type == Scope::eSwitch ? "Switch" :
          type == Scope::eTry ? "Try" :
          type == Scope::eCatch ? "Catch" :
          type == Scope::eUnconditional ? "Unconditional" :
          "Unknown");
    return s;
}

void SymbolDatabase::printVariable(const Variable *var, const char *indent) const
{
    std::cout << indent << "_name: " << var->nameToken();
    if (var->nameToken()) {
        std::cout << " " << var->name() << " " << _tokenizer->list.fileLine(var->nameToken()) << std::endl;
        std::cout << indent << "    varId: " << var->varId() << std::endl;
    } else
        std::cout << std::endl;
    std::cout << indent << "_start: " << var->typeStartToken() << " " << var->typeStartToken()->str()
              << " " << _tokenizer->list.fileLine(var->typeStartToken()) << std::endl;;
    std::cout << indent << "_end: " << var->typeEndToken() << " " << var->typeEndToken()->str()
              << " " << _tokenizer->list.fileLine(var->typeEndToken()) << std::endl;;
    std::cout << indent << "_index: " << var->index() << std::endl;
    std::cout << indent << "_access: " <<
              (var->isPublic() ? "Public" :
               var->isProtected() ? "Protected" :
               var->isPrivate() ? "Private" :
               var->isGlobal() ? "Global" :
               var->isNamespace() ? "Namespace" :
               var->isArgument() ? "Argument" :
               var->isLocal() ? "Local" :
               var->isThrow() ? "Throw" :
               "???")  << std::endl;
    std::cout << indent << "_flags: " << std::endl;
    std::cout << indent << "    isMutable: " << (var->isMutable() ? "true" : "false") << std::endl;
    std::cout << indent << "    isStatic: " << (var->isStatic() ? "true" : "false") << std::endl;
    std::cout << indent << "    isExtern: " << (var->isExtern() ? "true" : "false") << std::endl;
    std::cout << indent << "    isConst: " << (var->isConst() ? "true" : "false") << std::endl;
    std::cout << indent << "    isClass: " << (var->isClass() ? "true" : "false") << std::endl;
    std::cout << indent << "    isArray: " << (var->isArray() ? "true" : "false") << std::endl;
    std::cout << indent << "    isPointer: " << (var->isPointer() ? "true" : "false") << std::endl;
    std::cout << indent << "    isReference: " << (var->isReference() ? "true" : "false") << std::endl;
    std::cout << indent << "    hasDefault: " << (var->hasDefault() ? "true" : "false") << std::endl;
    std::cout << indent << "_type: ";
    if (var->type()) {
        std::cout << var->type()->className << " " << var->type()->type << " "
                  << _tokenizer->list.fileLine(var->type()->classDef) << std::endl;
    } else
        std::cout << "none" << std::endl;

    std::cout << indent << "_scope: ";
    if (var->scope()) {
        std::cout << var->scope()->className << " " << var->scope()->type;
        if (var->scope()->classDef)
            std::cout << " " << _tokenizer->list.fileLine(var->scope()->classDef) << std::endl;
        else
            std::cout << std::endl;
    } else
        std::cout << "none" << std::endl;

    std::cout << indent << "_dimensions:";
    for (std::size_t i = 0; i < var->dimensions().size(); i++) {
        std::cout << " " << var->dimension(i);
        if (!var->dimensions()[i].known)
            std::cout << "?";
    }
    std::cout << std::endl;
}

void SymbolDatabase::printOut(const char *title) const
{
    if (title)
        std::cout << "\n### " << title << " ###\n";

    std::list<Scope>::const_iterator scope;

    for (scope = scopeList.begin(); scope != scopeList.end(); ++scope) {
        std::cout << "Scope: " << &*scope << std::endl;
        std::cout << "    type: " << scope->type << std::endl;
        std::cout << "    className: " << scope->className << std::endl;
        std::cout << "    classDef: " << scope->classDef;
        if (scope->classDef)
            std::cout << " " << scope->classDef->str() << " " << _tokenizer->list.fileLine(scope->classDef) << std::endl;
        else
            std::cout << std::endl;

        std::cout << "    classStart: " << scope->classStart;
        if (scope->classStart)
            std::cout << " " << scope->classStart->str() << " " << _tokenizer->list.fileLine(scope->classStart) << std::endl;
        else
            std::cout << std::endl;

        std::cout << "    classEnd: " << scope->classEnd;
        if (scope->classEnd)
            std::cout << " " << scope->classEnd->str() << " " <<  _tokenizer->list.fileLine(scope->classEnd) << std::endl;
        else
            std::cout << std::endl;

        std::list<Function>::const_iterator func;

        // find the function body if not implemented inline
        for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
            std::cout << "    Function: " << &*func << std::endl;
            std::cout << "        name: " << func->tokenDef->str() << " "
                      << _tokenizer->list.fileLine(func->tokenDef) << std::endl;
            std::cout << "        type: " << (func->type == Function::eConstructor? "Constructor" :
                                              func->type == Function::eCopyConstructor ? "CopyConstructor" :
                                              func->type == Function::eOperatorEqual ? "OperatorEqual" :
                                              func->type == Function::eDestructor ? "Destructor" :
                                              func->type == Function::eFunction ? "Function" :
                                              "???") << std::endl;
            std::cout << "        access: " << (func->access == Public ? "Public" :
                                                func->access == Protected ? "Protected" :
                                                func->access == Private ? "Private" :
                                                "???")  << std::endl;
            std::cout << "        hasBody: " << (func->hasBody ? "true" : "false") << std::endl;
            std::cout << "        isInline: " << (func->isInline ? "true" : "false") << std::endl;
            std::cout << "        isConst: " << (func->isConst ? "true" : "false") << std::endl;
            std::cout << "        isVirtual: " << (func->isVirtual ? "true" : "false") << std::endl;
            std::cout << "        isPure: " << (func->isPure ? "true" : "false") << std::endl;
            std::cout << "        isStatic: " << (func->isStatic ? "true" : "false") << std::endl;
            std::cout << "        isFriend: " << (func->isFriend ? "true" : "false") << std::endl;
            std::cout << "        isExplicit: " << (func->isExplicit ? "true" : "false") << std::endl;
            std::cout << "        isOperator: " << (func->isOperator ? "true" : "false") << std::endl;
            std::cout << "        retFuncPtr: " << (func->retFuncPtr ? "true" : "false") << std::endl;
            std::cout << "        tokenDef: " << _tokenizer->list.fileLine(func->tokenDef) << std::endl;
            std::cout << "        argDef: " << _tokenizer->list.fileLine(func->argDef) << std::endl;
            if (func->hasBody) {
                std::cout << "        token: " << _tokenizer->list.fileLine(func->token) << std::endl;
                std::cout << "        arg: " << _tokenizer->list.fileLine(func->arg) << std::endl;
            }
            std::cout << "        nestedIn: ";
            if (func->nestedIn) {
                std::cout << func->nestedIn->className << " " << func->nestedIn->type;
                if (func->nestedIn->classDef)
                    std::cout << " " << _tokenizer->list.fileLine(func->nestedIn->classDef) << std::endl;
                else
                    std::cout << std::endl;
            } else
                std::cout << "Unknown" << std::endl;
            std::cout << "        functionScope: ";
            if (func->functionScope) {
                std::cout << func->functionScope->className << " "
                          <<  _tokenizer->list.fileLine(func->functionScope->classDef) << std::endl;
            } else
                std::cout << "Unknown" << std::endl;

            std::list<Variable>::const_iterator var;

            for (var = func->argumentList.begin(); var != func->argumentList.end(); ++var) {
                std::cout << "        Variable: " << &*var << std::endl;
                printVariable(&*var, "            ");
            }
        }

        std::list<Variable>::const_iterator var;

        for (var = scope->varlist.begin(); var != scope->varlist.end(); ++var) {
            std::cout << "    Variable: " << &*var << std::endl;
            printVariable(&*var, "        ");
        }

        std::cout << "    derivedFrom[" << scope->derivedFrom.size() << "] = (";

        std::size_t count = scope->derivedFrom.size();
        for (std::size_t i = 0; i < scope->derivedFrom.size(); ++i) {
            if (scope->derivedFrom[i].isVirtual)
                std::cout << "Virtual ";

            std::cout << (scope->derivedFrom[i].access == Public    ? " Public " :
                          scope->derivedFrom[i].access == Protected ? " Protected " :
                          scope->derivedFrom[i].access == Private   ? " Private " :
                          " Unknown");

            if (scope->derivedFrom[i].scope)
                std::cout << scope->derivedFrom[i].scope->type;
            else
                std::cout << " Unknown";

            std::cout << " " << scope->derivedFrom[i].name;
            if (count-- > 1)
                std::cout << ",";
        }

        std::cout << " )" << std::endl;

        std::cout << "    nestedIn: " << scope->nestedIn;
        if (scope->nestedIn) {
            std::cout << " " << scope->nestedIn->type << " "
                      << scope->nestedIn->className;
        }
        std::cout << std::endl;

        std::cout << "    nestedList[" << scope->nestedList.size() << "] = (";

        std::list<Scope *>::const_iterator nsi;

        count = scope->nestedList.size();
        for (nsi = scope->nestedList.begin(); nsi != scope->nestedList.end(); ++nsi) {
            std::cout << " " << &(*nsi) << " " << (*nsi)->type << " " << (*nsi)->className;
            if (count-- > 1)
                std::cout << ",";
        }

        std::cout << " )" << std::endl;

        std::cout << "    needInitialization: " << (scope->needInitialization == Scope::Unknown ? "Unknown" :
                  scope->needInitialization == Scope::True ? "True" :
                  scope->needInitialization == Scope::False ? "False" :
                  "Invalid") << std::endl;

        std::list<const Token *>::const_iterator use;

        for (use = scope->usingList.begin(); use != scope->usingList.end(); ++use) {
            std::cout << "    using: " << (*use)->strAt(2);
            const Token *tok1 = (*use)->tokAt(3);
            while (tok1 && tok1->str() == "::") {
                std::cout << "::" << tok1->strAt(1);
                tok1 = tok1->tokAt(2);
            }
            std::cout << " " << _tokenizer->list.fileLine(*use) << std::endl;
        }

        std::cout << "    functionOf: " << scope->functionOf;
        if (scope->functionOf) {
            std::cout << " " << scope->functionOf->type << " " << scope->functionOf->className;
            if (scope->functionOf->classDef)
                std::cout << " " << _tokenizer->list.fileLine(scope->functionOf->classDef);
        }
        std::cout << std::endl;

        std::cout << "    function: " << scope->function;
        if (scope->function) {
            std::cout << " " << scope->function->tokenDef->str() << " "
                      << _tokenizer->list.fileLine(scope->function->tokenDef);
        }
        std::cout << std::endl;
    }

    for (std::size_t i = 0; i < _variableList.size(); i++) {
        std::cout << "_variableList[" << i << "] = " << _variableList[i] << std::endl;
    }
}

//---------------------------------------------------------------------------

void Function::addArguments(const SymbolDatabase *symbolDatabase, const Scope *scope)
{
    // check for non-empty argument list "( ... )"
    if (arg && arg->link() != arg->next() && !Token::simpleMatch(arg, "( void )")) {
        unsigned int count = 0;

        for (const Token* tok = arg->next(); tok; tok = tok->next()) {
            const Token* startTok = tok;
            const Token* endTok   = NULL;
            const Token* nameTok  = NULL;

            if (tok->str() == "," || tok->str() == ")")
                return; // Syntax error

            do {
                if (tok->varId() != 0) {
                    nameTok = tok;
                    endTok = tok->previous();
                } else if (tok->str() == "[") {
                    // skip array dimension(s)
                    tok = tok->link();
                    while (tok->next()->str() == "[")
                        tok = tok->next()->link();
                } else if (tok->str() == "<") {
                    bool success = tok->findClosingBracket(tok);
                    if (!tok || !success) // something is wrong so just bail out
                        return;
                }

                tok = tok->next();

                if (!tok) // something is wrong so just bail
                    return;
            } while (tok->str() != "," && tok->str() != ")" && tok->str() != "=");

            const Token *typeTok = startTok->tokAt(startTok->str() == "const" ? 1 : 0);
            if (typeTok->str() == "struct")
                typeTok = typeTok->next();

            // check for argument with no name or missing varid
            if (!endTok) {
                if (tok->previous()->isName()) {
                    if (tok->previous() != typeTok) {
                        nameTok = tok->previous();
                        endTok = nameTok->previous();

                        if (hasBody)
                            symbolDatabase->debugMessage(nameTok, "Function::addArguments found argument \'" + nameTok->str() + "\' with varid 0.");
                    } else
                        endTok = startTok;
                } else
                    endTok = tok->previous();
            }

            const Scope *argType = NULL;
            if (!typeTok->isStandardType())
                argType = symbolDatabase->findVariableType(scope, typeTok);

            // skip default values
            if (tok->str() == "=") {
                initArgCount++;
                while (tok->str() != "," && tok->str() != ")") {
                    if (tok->link() && Token::Match(tok, "[{[(<]"))
                        tok = tok->link();
                    tok = tok->next();
                }
            }

            argumentList.push_back(Variable(nameTok, startTok, endTok, count++, Argument, argType, functionScope));

            if (tok->str() == ")")
                break;
        }
    }
}

bool Function::isImplicitlyVirtual(bool defaultVal) const
{
    if (isVirtual)
        return true;
    else if (access == Private || access == Public || access == Protected) {
        bool safe = true;
        bool hasVirt = isImplicitlyVirtual_rec(functionScope->functionOf, safe);
        if (hasVirt)
            return true;
        else if (safe)
            return false;
        else
            return defaultVal;
    } else
        return false;
}

bool Function::isImplicitlyVirtual_rec(const Scope* scope, bool& safe) const
{
    // check each base class
    for (unsigned int i = 0; i < scope->derivedFrom.size(); ++i) {
        // check if base class exists in database
        if (scope->derivedFrom[i].scope) {
            const Scope *parent = scope->derivedFrom[i].scope;

            std::list<Function>::const_iterator func;

            // check if function defined in base class
            for (func = parent->functionList.begin(); func != parent->functionList.end(); ++func) {
                if (func->isVirtual && func->tokenDef->str() == tokenDef->str()) { // Base is virtual and of same name
                    const Token *temp1 = func->tokenDef->previous();
                    const Token *temp2 = tokenDef->previous();
                    bool returnMatch = true;

                    // check for matching return parameters
                    while (temp1->str() != "virtual") {
                        if (temp1->str() != temp2->str()) {
                            returnMatch = false;
                            break;
                        }

                        temp1 = temp1->previous();
                        temp2 = temp2->previous();
                    }

                    // check for matching function parameters
                    if (returnMatch && argsMatch(scope, func->argDef, argDef, "", 0)) {
                        return true;
                    }
                }
            }

            if (!parent->derivedFrom.empty())
                if (isImplicitlyVirtual_rec(parent, safe))
                    return true;
        } else {
            // unable to find base class so assume it has no virtual function
            safe = false;
            return false;
        }
    }
    return false;
}

const Variable* Function::getArgumentVar(unsigned int num) const
{
    for (std::list<Variable>::const_iterator i = argumentList.begin(); i != argumentList.end(); ++i) {
        if (i->index() == num)
            return(&*i);
        else if (i->index() > num)
            return 0;
    }
    return 0;
}


//---------------------------------------------------------------------------

Scope::Scope(SymbolDatabase *check_, const Token *classDef_, Scope *nestedIn_, ScopeType type_, const Token *start_) :
    check(check_),
    classDef(classDef_),
    classStart(start_),
    classEnd(start_->link()),
    nestedIn(nestedIn_),
    numConstructors(0),
    needInitialization(Scope::Unknown),
    type(type_),
    functionOf(NULL),
    function(NULL)
{
}

Scope::Scope(SymbolDatabase *check_, const Token *classDef_, Scope *nestedIn_) :
    check(check_),
    classDef(classDef_),
    classStart(NULL),
    classEnd(NULL),
    nestedIn(nestedIn_),
    numConstructors(0),
    needInitialization(Scope::Unknown),
    functionOf(NULL),
    function(NULL)
{
    if (!classDef) {
        type = Scope::eGlobal;
    } else if (classDef->str() == "class") {
        type = Scope::eClass;
        className = classDef->next()->str();
    } else if (classDef->str() == "struct") {
        type = Scope::eStruct;
        // anonymous and unnamed structs don't have a name
        if (classDef->next()->str() != "{")
            className = classDef->next()->str();
    } else if (classDef->str() == "union") {
        type = Scope::eUnion;
        // anonymous and unnamed unions don't have a name
        if (classDef->next()->str() != "{")
            className = classDef->next()->str();
    } else if (classDef->str() == "namespace") {
        type = Scope::eNamespace;
        className = classDef->next()->str();
    } else {
        type = Scope::eFunction;
        className = classDef->str();
    }
}

bool Scope::hasDefaultConstructor() const
{
    if (numConstructors) {
        std::list<Function>::const_iterator func;

        for (func = functionList.begin(); func != functionList.end(); ++func) {
            if (func->type == Function::eConstructor && func->argCount() == 0)
                return true;
        }
    }
    return false;
}

AccessControl Scope::defaultAccess() const
{
    switch (type) {
    case eGlobal:
        return Global;
    case eClass:
        return Private;
    case eStruct:
        return Public;
    case eUnion:
        return Public;
    case eNamespace:
        return Namespace;
    default:
        return Local;
    }
}

// Get variable list..
void Scope::getVariableList()
{
    AccessControl varaccess = defaultAccess();
    const Token *start;
    unsigned int level = 1;

    if (classStart)
        start = classStart->next();
    else
        start = check->_tokenizer->tokens();

    for (const Token *tok = start; tok; tok = tok->next()) {
        // end of scope?
        if (tok->str() == "}") {
            level--;
            if (level == 0)
                break;
        }

        // syntax error?
        else if (tok->next() == NULL)
            break;

        // Is it a function?
        else if (tok->str() == "{") {
            tok = tok->link();
            // syntax error?
            if (!tok)
                return;
            continue;
        }

        // Is it a nested class or structure?
        else if (Token::Match(tok, "class|struct|union|namespace %type% :|{")) {
            tok = tok->tokAt(2);
            while (tok && tok->str() != "{")
                tok = tok->next();
            if (tok) {
                // skip implementation
                tok = tok->link();
                continue;
            } else
                break;
        } else if (Token::Match(tok, "struct|union {") && Token::Match(tok->next()->link(), "} %var% ;|[")) {
            tok = tok->next()->link()->tokAt(2);
            continue;
        } else if (Token::Match(tok, "struct|union {") && Token::simpleMatch(tok->next()->link(), "} ;")) {
            level++;
            tok = tok->next();
            continue;
        }

        // Borland C++: Skip all variables in the __published section.
        // These are automatically initialized.
        else if (tok->str() == "__published:") {
            for (; tok; tok = tok->next()) {
                if (tok->str() == "{")
                    tok = tok->link();
                if (Token::Match(tok->next(), "private:|protected:|public:"))
                    break;
            }
            if (tok)
                continue;
            else
                break;
        }

        // "private:" "public:" "protected:" etc
        else if (tok->str() == "public:") {
            varaccess = Public;
            continue;
        } else if (tok->str() == "protected:") {
            varaccess = Protected;
            continue;
        } else if (tok->str() == "private:") {
            varaccess = Private;
            continue;
        }

        // Is it a forward declaration?
        else if (Token::Match(tok, "class|struct|union %var% ;")) {
            tok = tok->tokAt(2);
            continue;
        }

        // Borland C++: Ignore properties..
        else if (tok->str() == "__property")
            continue;

        // skip return and delete
        else if (Token::Match(tok, "return|delete")) {
            while (tok->next() && tok->next()->str() != ";")
                tok = tok->next();
            continue;
        }

        // Search for start of statement..
        else if (tok->previous() && !Token::Match(tok->previous(), ";|{|}|public:|protected:|private:"))
            continue;
        else if (Token::Match(tok, ";|{|}"))
            continue;
        else if (Token::Match(tok, "goto %var% ;")) {
            tok = tok->tokAt(2);
            continue;
        }

        tok = checkVariable(tok, varaccess);

        if (!tok)
            break;
    }
}

const Token *Scope::checkVariable(const Token *tok, AccessControl varaccess)
{
    // This is the start of a statement
    const Token *vartok = NULL;
    const Token *typetok = NULL;

    // Is it a throw..?
    if (Token::Match(tok, "throw %any% (") &&
        Token::simpleMatch(tok->linkAt(2), ") ;")) {
        return tok->linkAt(2);
    } else if ((Token::Match(tok, "throw %any% :: %any% (") &&
                Token::simpleMatch(tok->linkAt(4), ") ;"))) {
        return tok->linkAt(4);
    }

    // friend?
    if (Token::Match(tok, "friend %type%") && tok->next()->varId() == 0)
        return Token::findsimplematch(tok->tokAt(2), ";");

    // skip const|static|mutable|extern
    while (Token::Match(tok, "const|static|mutable|extern")) {
        tok = tok->next();
    }

    // the start of the type tokens does not include the above modifiers
    const Token *typestart = tok;

    if (Token::Match(tok, "struct|union")) {
        tok = tok->next();
    }

    if (tok && isVariableDeclaration(tok, vartok, typetok)) {
        // If the vartok was set in the if-blocks above, create a entry for this variable..
        tok = vartok->next();
        while (tok && tok->str() == "[")
            tok = tok->link()->next();

        if (vartok->varId() == 0 && !vartok->isBoolean())
            check->debugMessage(vartok, "Scope::checkVariable found variable \'" + vartok->str() + "\' with varid 0.");

        const Scope *scope = NULL;

        if (typetok)
            scope = check->findVariableType(this, typetok);

        addVariable(vartok, typestart, vartok->previous(), varaccess, scope, this);
    }

    return tok;
}

const Variable *Scope::getVariable(const std::string &varname) const
{
    std::list<Variable>::const_iterator iter;

    for (iter = varlist.begin(); iter != varlist.end(); ++iter) {
        if (iter->name() == varname)
            return &*iter;
    }

    return NULL;
}

static const Token* skipScopeIdentifiers(const Token* tok)
{
    if (Token::simpleMatch(tok, "::")) {
        tok = tok->next();
    }
    while (Token::Match(tok, "%type% ::")) {
        tok = tok->tokAt(2);
    }

    return tok;
}

static const Token* skipPointers(const Token* tok)
{
    while (Token::Match(tok, "*|&")) {
        tok = tok->next();
    }

    return tok;
}

bool Scope::isVariableDeclaration(const Token* tok, const Token*& vartok, const Token*& typetok) const
{
    if (tok && tok->str() == "throw" && check->_tokenizer->isCPP())
        return false;

    const Token* localTypeTok = skipScopeIdentifiers(tok);
    const Token* localVarTok = NULL;

    if (Token::Match(localTypeTok, "%type% <")) {
        const Token* closeTok = NULL;
        bool found = localTypeTok->next()->findClosingBracket(closeTok);
        if (found) {
            localVarTok = skipPointers(closeTok->next());

            if (Token::Match(localVarTok, ":: %type% %var% ;|=")) {
                localTypeTok = localVarTok->next();
                localVarTok = localVarTok->tokAt(2);
            }
        }
    } else if (Token::Match(localTypeTok, "%type%")) {
        localVarTok = skipPointers(localTypeTok->strAt(1)=="const"?localTypeTok->tokAt(2):localTypeTok->next());
    }

    if (localVarTok && localVarTok->str() == "const")
        localVarTok = localVarTok->next();

    if (Token::Match(localVarTok, "%var% ;|=")) {
        vartok = localVarTok;
        typetok = localTypeTok;
    } else if (Token::Match(localVarTok, "%var% [") && localVarTok->str() != "operator") {
        vartok = localVarTok;
        typetok = localTypeTok;
    } else if ((isLocal() || type == Scope::eFunction) &&
               Token::Match(localVarTok, "%var% (") &&
               Token::simpleMatch(localVarTok->next()->link(), ") ;")) {
        vartok = localVarTok;
        typetok = localTypeTok;
    } else if (type == eCatch &&
               (Token::Match(localTypeTok, "%var% )") ||
                Token::Match(localTypeTok, "%var% &| %var% )"))) {
        vartok = localVarTok;
        typetok = localTypeTok;
    }

    return NULL != vartok;
}



//---------------------------------------------------------------------------

const Scope *SymbolDatabase::findVariableType(const Scope *start, const Token *type) const
{
    std::list<Scope>::const_iterator scope;

    for (scope = scopeList.begin(); scope != scopeList.end(); ++scope) {
        // skip namespaces, functions, ...
        if (scope->type != Scope::eClass && scope->type != Scope::eStruct && scope->type != Scope::eUnion)
            continue;

        // do the names match?
        if (scope->className == type->str()) {
            // check if type does not have a namespace
            if (type->previous() == NULL || type->previous()->str() != "::") {
                const Scope *parent = start;

                // check if in same namespace
                while (parent) {
                    // out of line class function belongs to class
                    if (parent->type == Scope::eFunction && parent->functionOf)
                        parent = parent->functionOf;
                    else if (parent != scope->nestedIn)
                        parent = parent->nestedIn;
                    else
                        break;
                }

                if (scope->nestedIn == parent)
                    return &(*scope);
            }

            // type has a namespace
            else {
                // FIXME check if namespace path matches supplied path
                return &(*scope);
            }
        }
    }

    return NULL;
}

//---------------------------------------------------------------------------

const Scope *SymbolDatabase::findFunctionScopeByToken(const Token *tok) const
{
    std::list<Scope>::const_iterator scope;

    for (scope = scopeList.begin(); scope != scopeList.end(); ++scope) {
        if (scope->type == Scope::eFunction) {
            if (scope->classDef == tok)
                return &(*scope);
        }
    }
    return 0;
}

//---------------------------------------------------------------------------

const Function *SymbolDatabase::findFunctionByToken(const Token *tok) const
{
    std::list<Scope>::const_iterator scope;

    for (scope = scopeList.begin(); scope != scopeList.end(); ++scope) {
        std::list<Function>::const_iterator func;

        for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
            if (func->token == tok)
                return &(*func);
        }
    }
    return 0;
}

const Function* SymbolDatabase::findFunctionByName(const std::string& str, const Scope* startScope) const
{
    const Scope* currScope = startScope;
    while (currScope && currScope->isExecutable()) {
        if (currScope->functionOf)
            currScope = currScope->functionOf;
        else
            currScope = currScope->nestedIn;
    }
    while (currScope) {
        for (std::list<Function>::const_iterator i = currScope->functionList.begin(); i != currScope->functionList.end(); ++i) {
            if (i->tokenDef->str() == str)
                return &*i;
        }
        currScope = currScope->nestedIn;
    }
    return 0;
}

/** @todo This function only counts the number of arguments in the function call.
    It does not take into account functions with default arguments.
    It does not take into account argument types.  This can be difficult because of promotion and conversion operators and casts and because the argument can also be a function call.
 */
const Function* SymbolDatabase::findFunctionByNameAndArgs(const Token *tok, const Scope *startScope) const
{
    const Scope* currScope = startScope;
    while (currScope && currScope->isExecutable()) {
        if (currScope->functionOf)
            currScope = currScope->functionOf;
        else
            currScope = currScope->nestedIn;
    }
    while (currScope) {
        for (std::list<Function>::const_iterator i = currScope->functionList.begin(); i != currScope->functionList.end(); ++i) {
            if (i->tokenDef->str() == tok->str()) {
                const Function *func = &*i;
                if (tok->strAt(1) == "(" && tok->tokAt(2)) {
                    // check if function has no arguments
                    if (tok->strAt(2) == ")" && (func->argCount() == 0 || func->argCount() == func->initializedArgCount()))
                        return func;

                    // check the arguments
                    unsigned int args = 0;
                    const Token *arg = tok->tokAt(2);
                    while (arg) {
                        /** @todo check argument type for match */
                        /** @todo check for default arguments */
                        args++;
                        arg = arg->nextArgument();
                    }

                    if (args == func->argCount())
                        return func;
                }
            }
        }
        currScope = currScope->nestedIn;
    }
    return 0;
}

//---------------------------------------------------------------------------

const Scope* SymbolDatabase::findScopeByName(const std::string& name) const
{
    for (std::list<Scope>::const_iterator it = scopeList.begin(); it != scopeList.end(); ++it) {
        if (it->className == name)
            return &*it;
    }
    return 0;
}

//---------------------------------------------------------------------------

Scope * Scope::findInNestedList(const std::string & name)
{
    std::list<Scope *>::iterator it;

    for (it = nestedList.begin(); it != nestedList.end(); ++it) {
        if ((*it)->className == name)
            return (*it);
    }
    return 0;
}

//---------------------------------------------------------------------------

Scope * Scope::findInNestedListRecursive(const std::string & name)
{
    std::list<Scope *>::iterator it;

    for (it = nestedList.begin(); it != nestedList.end(); ++it) {
        if ((*it)->className == name)
            return (*it);
    }

    for (it = nestedList.begin(); it != nestedList.end(); ++it) {
        Scope *child = (*it)->findInNestedListRecursive(name);
        if (child)
            return child;
    }
    return 0;
}

//---------------------------------------------------------------------------

const Scope * Scope::findQualifiedScope(const std::string & name) const
{
    if (type == Scope::eClass || type == Scope::eStruct || type == Scope::eNamespace) {
        if (name.compare(0, className.size(), className) == 0) {
            std::string path = name;
            path.erase(0, className.size());
            if (path.compare(0, 4, " :: ") == 0)
                path.erase(0, 4);
            else if (path.empty())
                return this;

            std::list<Scope *>::const_iterator it;

            for (it = nestedList.begin() ; it != nestedList.end(); ++it) {
                const Scope *scope1 = (*it)->findQualifiedScope(path);
                if (scope1)
                    return scope1;
            }
        }
    }
    return 0;
}

//---------------------------------------------------------------------------

const Function *Scope::getDestructor() const
{
    std::list<Function>::const_iterator it;
    for (it = functionList.begin(); it != functionList.end(); ++it) {
        if (it->type == Function::eDestructor)
            return &(*it);
    }
    return 0;
}

//---------------------------------------------------------------------------

unsigned int Scope::getNestedNonFunctions() const
{
    unsigned int nested = 0;
    std::list<Scope *>::const_iterator ni;
    for (ni = nestedList.begin(); ni != nestedList.end(); ++ni) {
        if ((*ni)->type != Scope::eFunction)
            nested++;
    }
    return nested;
}