walkero
/
cppcheck
1
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity
cppcheck/lib/symboldatabase.cpp

1841 lines
64 KiB
C++
Raw Blame History

/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2011 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 <locale>
#include <cstring>
#include <string>
#include <sstream>
#include <algorithm>
#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();
// 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();
const Token *tok2 = tok->tokAt(2);
// only create base list for classes and structures
if (new_scope->isClassOrStruct()) {
// goto initial '{'
tok2 = initBaseInfo(new_scope, 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;
}
// 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();
std::vector<Dimension> dimensions;
bool isArray = false;
if (tok->next()->link()->strAt(2) == "[")
isArray = arrayDimensions(dimensions, tok->next()->link()->tokAt(2));
scope->addVariable(tok->next()->link()->next(), tok, tok, scope->access, false, false, false, true, new_scope, scope, isArray, dimensions);
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();
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:")
scope->access = Private;
else if (tok->str() == "protected:")
scope->access = Protected;
else if (tok->str() == "public:")
scope->access = Public;
else if (Token::Match(tok, "public|protected|private %var% :")) {
if (tok->str() == "private")
scope->access = Private;
else if (tok->str() == "protected")
scope->access = Protected;
else if (tok->str() == "public")
scope->access = Public;
tok = tok->tokAt(2);
}
// class function?
else if (tok->previous()->str() != "::" && isFunction(tok, &funcStart, &argStart)) {
Function function;
// save the function definition argument start '('
function.argDef = argStart;
// save the access type
function.access = scope->access;
// save the function name location
function.tokenDef = funcStart;
// 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();
// save start of function
function.start = end;
scope->functionList.push_back(function);
const Token *tok2 = funcStart;
Scope *functionOf = scope;
addNewFunction(&scope, &tok2);
if (scope) {
scope->functionOf = functionOf;
scope->function = &functionOf->functionList.back();
scope->function->functionScope = scope;
}
tok = tok2;
}
}
// nested class or friend function?
else if (tok->previous()->str() == "::" && isFunction(tok, &funcStart, &argStart)) {
/** @todo check entire qualification for match */
Scope * nested = scope->findInNestedListRecursive(tok->strAt(-2));
if (nested)
addFunction(&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);
/** @todo fill this in later 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, &funcStart, &argStart)) {
// has body?
if (Token::Match(argStart->link(), ") const| {|:")) {
Scope *old_scope = scope;
// class function
if (tok->previous() && tok->previous()->str() == "::")
addFunction(&scope, &tok, argStart);
// class destructor
else if (tok->previous() && tok->previous()->str() == "~" &&
tok->previous()->previous() && tok->previous()->previous()->str() == "::")
addFunction(&scope, &tok, argStart);
// regular function
else {
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.token = funcStart;
function.isInline = false;
function.hasBody = true;
function.arg = function.argDef;
function.type = Function::eFunction;
// find start of function '{'
const Token *start = tok;
while (start && start->str() != "{")
start = start->next();
// save start of function
function.start = start;
addNewFunction(&scope, &tok);
if (scope)
old_scope->functionList.push_back(function);
}
// syntax error
if (!scope) {
scope = old_scope;
break;
}
}
// function returning function pointer with body
else if (Token::simpleMatch(argStart->link(), ") ) (") &&
Token::Match(argStart->link()->tokAt(2)->link(), ") const| {")) {
const Token *tok1 = funcStart;
Scope *old_scope = scope;
// class function
if (tok1->previous()->str() == "::")
addFunction(&scope, &tok1, argStart);
// regular function
else {
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.token = funcStart;
function.isInline = false;
function.hasBody = true;
function.arg = function.argDef;
function.type = Function::eFunction;
function.retFuncPtr = true;
// find start of function '{'
const Token *start = tok;
while (start && start->str() != "{")
start = start->next();
// save start of function
function.start = start;
addNewFunction(&scope, &tok1);
if (scope)
old_scope->functionList.push_back(function);
}
// syntax error?
if (!scope) {
scope = old_scope;
break;
}
tok = tok1;
}
// function prototype
else if (Token::simpleMatch(argStart->link(), ") ;")) {
/** @todo save function prototypes in database someday */
tok = argStart->link()->next();
continue;
}
// function returning function pointer prototype
else if (Token::simpleMatch(argStart->link(), ") ) (") &&
Token::simpleMatch(argStart->link()->tokAt(2)->link(), ") ;")) {
/** @todo save function prototypes in database someday */
tok = argStart->link()->tokAt(2)->link()->next();
continue;
}
}
} else if (scope->type == Scope::eFunction || scope->isLocal()) {
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->next()->next()->link(), ") {")) {
const Token *tok1 = tok->next()->next()->link()->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 (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 variable info
for (it = scopeList.begin(); it != scopeList.end(); ++it) {
scope = &(*it);
// find variables
scope->getVariableList();
}
// fill in function arguments
for (it = scopeList.begin(); it != scopeList.end(); ++it) {
scope = &(*it);
std::list<Function>::iterator func;
for (func = scope->functionList.begin(); func != scope->functionList.end(); ++func) {
// add arguments
func->addArguments(this, &*func, scope);
}
}
// 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 (size_t i = 1; i <= _tokenizer->varIdCount(); i++) {
// check each array variable
if (_variableList[i] && _variableList[i]->isArray()) {
// check each array dimension
for (size_t j = 0; j < _variableList[i]->dimensions().size(); j++) {
// check for a single token dimension that is a variable
if (_variableList[i]->dimensions()[j].start &&
(_variableList[i]->dimensions()[j].start == _variableList[i]->dimensions()[j].end) &&
_variableList[i]->dimensions()[j].start->varId()) {
Dimension &dimension = const_cast<Dimension &>(_variableList[i]->dimensions()[j]);
// 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 Token **funcStart, const Token **argStart) const
{
// 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% (") &&
(Token::Match(tok->next()->link(), ") const| ;|{|=") ||
Token::Match(tok->next()->link(), ") : %var% (|::"))) {
*funcStart = tok;
*argStart = tok->next();
return true;
}
return false;
}
bool SymbolDatabase::argsMatch(const Scope *scope, const Token *first, const Token *second, const std::string &path, unsigned int depth) const
{
bool match = false;
while (first->str() == second->str()) {
// at end of argument list
if (first->str() == ")") {
match = true;
break;
}
// skip default value assignment
else if (first->next()->str() == "=") {
first = first->tokAt(2);
if (second->next()->str() == "=")
second = second->tokAt(2);
}
// 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();
// skip default value assignment
if (first->next()->str() == "=")
first = first->tokAt(2);
}
// 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 match;
}
void SymbolDatabase::addFunction(Scope **scope, const Token **tok, const Token *argStart)
{
int count = 0;
bool added = false;
std::string path;
unsigned int path_length = 0;
const Token *tok1;
// skip class/struct name
if ((*tok)->previous()->str() == "~")
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 (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)) {
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) {
if (func->type == Function::eDestructor &&
(*tok)->previous()->str() == "~" &&
func->tokenDef->str() == (*tok)->str()) {
if (argsMatch(scope1, func->tokenDef->next(), (*tok)->next(), path, path_length)) {
func->hasBody = true;
func->token = *tok;
func->arg = argStart;
const Token *start = argStart->link()->next();
while (start && start->str() != "{")
start = start->next();
func->start = start;
}
} else if (func->tokenDef->str() == (*tok)->str() && (*tok)->previous()->str() != "~") {
if (argsMatch(scope1, func->tokenDef->next(), (*tok)->next(), path, path_length)) {
// 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;
func->token = *tok;
func->arg = argStart;
const Token *start = argStart->link()->next();
while (start && start->str() != "{")
start = start->next();
func->start = start;
}
}
// function returning function pointer?
else if (func->retFuncPtr) {
// todo check for const
func->hasBody = true;
func->token = *tok;
func->arg = argStart;
const Token *start = argStart->link()->next()->next()->link()->next();
while (start && start->str() != "{")
start = start->next();
func->start = start;
}
}
}
if (func->hasBody) {
addNewFunction(scope, tok);
if (*scope) {
(*scope)->functionOf = scope1;
(*scope)->function = &*func;
(*scope)->function->functionScope = *scope;
added = true;
}
break;
}
}
}
}
}
// check for class function for unknown class
if (!added)
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() != "{")
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 *SymbolDatabase::initBaseInfo(Scope *scope, const Token *tok)
{
// goto initial '{'
const Token *tok2 = tok->tokAt(2);
int level = 0;
while (tok2 && tok2->str() != "{") {
// skip unsupported templates
if (tok2->str() == "<")
level++;
else if (tok2->str() == ">")
level--;
// check for base classes
else if (level == 0 && 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
scope->derivedFrom.push_back(base);
}
tok2 = tok2->next();
}
return tok2;
}
void SymbolDatabase::debugMessage(const Token *tok, const std::string &msg) const
{
if (tok && _settings->debugwarnings) {
std::list<ErrorLogger::ErrorMessage::FileLocation> locationList;
ErrorLogger::ErrorMessage::FileLocation loc;
loc.line = tok->linenr();
loc.setfile(_tokenizer->file(tok));
locationList.push_back(loc);
const ErrorLogger::ErrorMessage errmsg(locationList,
Severity::debug,
msg,
"debug",
false);
if (_errorLogger)
_errorLogger->reportErr(errmsg);
else
Check::reportError(errmsg);
}
}
bool SymbolDatabase::arrayDimensions(std::vector<Dimension> &dimensions, const Token *tok) const
{
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;
}
//---------------------------------------------------------------------------
unsigned int Function::initializedArgCount() const
{
unsigned int count = 0;
std::list<Variable>::const_iterator var;
for (var = argumentList.begin(); var != argumentList.end(); ++var) {
if (var->hasDefault())
++count;
}
return count;
}
void Function::addArguments(const SymbolDatabase *symbolDatabase, const Function *func, const Scope *scope)
{
// check for non-empty argument list "( ... )"
if (arg->link() != arg->next() && !Token::simpleMatch(arg, "( void )")) {
unsigned int count = 0;
const Token *startTok;
const Token *endTok;
const Token *nameTok;
bool isConstVar;
bool isArrayVar;
bool hasDefault;
const Token *tok = arg->next();
for (;;) {
startTok = tok;
endTok = NULL;
nameTok = NULL;
isConstVar = bool(tok->str() == "const");
isArrayVar = false;
hasDefault = false;
std::vector<Dimension> dimensions;
while (tok->str() != "," && tok->str() != ")" && tok->str() != "=") {
if (tok->varId() != 0) {
nameTok = tok;
endTok = tok->previous();
} else if (tok->str() == "[") {
isArrayVar = symbolDatabase->arrayDimensions(dimensions, tok);
// skip array dimension(s)
tok = tok->link();
while (tok->next()->str() == "[")
tok = tok->next()->link();
} else if (tok->str() == "<") {
int level = 1;
while (tok && tok->next()) {
tok = tok->next();
if (tok->str() == ">") {
--level;
if (level == 0)
break;
} else if (tok->str() == "<")
level++;
}
}
tok = tok->next();
if (!tok) // something is wrong so just bail
return;
}
// check for argument with no name or missing varid
if (!endTok) {
if (tok->previous()->isName()) {
if (tok->previous() != startTok->tokAt(isConstVar ? 1 : 0)) {
nameTok = tok->previous();
endTok = nameTok->previous();
if (func->hasBody)
symbolDatabase->debugMessage(nameTok, "Function::addArguments found argument \'" + nameTok->str() + "\' with varid 0.");
} else
endTok = startTok;
} else
endTok = tok->previous();
}
const Token *typeTok = startTok;
if (isConstVar)
typeTok = typeTok->next();
const Scope *argType = NULL;
if (!typeTok->isStandardType())
argType = symbolDatabase->findVariableType(scope, typeTok);
bool isClassVar = startTok == endTok && !startTok->isStandardType();
// skip default values
if (tok->str() == "=") {
hasDefault = true;
while (tok->str() != "," && tok->str() != ")")
tok = tok->next();
}
argumentList.push_back(Variable(nameTok, startTok, endTok, count++, Argument, false, false, isConstVar, isClassVar, argType, functionScope, isArrayVar, hasDefault, dimensions));
if (tok->str() == ")")
break;
tok = tok->next();
}
}
}
//---------------------------------------------------------------------------
Scope::Scope(SymbolDatabase *check_, const Token *classDef_, Scope *nestedIn_, ScopeType type_, const Token *start_) :
check(check_),
type(type_),
classDef(classDef_),
classStart(start_),
classEnd(start_->link()),
nestedIn(nestedIn_),
access(Public),
numConstructors(0),
needInitialization(Scope::Unknown),
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;
access = Public;
} else if (classDef->str() == "class") {
type = Scope::eClass;
className = classDef->next()->str();
access = Private;
} 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();
access = Public;
} 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();
access = Public;
} else if (classDef->str() == "namespace") {
type = Scope::eNamespace;
className = classDef->next()->str();
access = Public;
} else {
type = Scope::eFunction;
className = classDef->str();
access = Public;
}
}
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;
}
return Public;
}
// Get variable list..
void Scope::getVariableList()
{
AccessControl varaccess = defaultAccess();
const Token *start;
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()->next()->next();
continue;
} else if (Token::Match(tok, "struct|union {") && Token::Match(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->next()->next();
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 const..?
bool isConst = false;
if (tok->str() == "const") {
tok = tok->next();
isConst = true;
}
// Is it a static variable?
const bool isStatic(Token::simpleMatch(tok, "static"));
if (isStatic) {
tok = tok->next();
}
// Is it a mutable variable?
const bool isMutable(Token::simpleMatch(tok, "mutable"));
if (isMutable) {
tok = tok->next();
}
// Is it const..?
if (tok->str() == "const") {
tok = tok->next();
isConst = true;
}
// the start of the type tokens does not include the above modifiers
const Token *typestart = tok;
bool isClass = false;
if (Token::Match(tok, "struct|union")) {
tok = tok->next();
}
bool isArray = false;
std::vector<Dimension> dimensions;
if (tok && isVariableDeclaration(tok, vartok, typetok, isArray)) {
isClass = (!typetok->isStandardType() && vartok->previous()->str() != "*");
if (isArray) {
isArray = check->arrayDimensions(dimensions, vartok->next());
tok = vartok->next();
while (tok && tok->str() == "[")
tok = tok->link()->next();
} else
tok = vartok->next();
}
// If the vartok was set in the if-blocks above, create a entry for this variable..
if (vartok && vartok->str() != "operator") {
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, isMutable, isStatic, isConst, isClass, scope, this, isArray, dimensions);
}
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;
}
const Token* skipScopeIdentifiers(const Token* tok)
{
const Token* ret = tok;
if (Token::simpleMatch(ret, "::")) {
ret = ret->next();
}
while (Token::Match(ret, "%type% ::")) {
ret = ret->tokAt(2);
}
return ret;
}
const Token* skipPointers(const Token* tok)
{
const Token* ret = tok;
while (Token::simpleMatch(ret, "*")) {
ret = ret->next();
}
return ret;
}
bool Scope::isVariableDeclaration(const Token* tok, const Token*& vartok, const Token*& typetok, bool &isArray) const
{
const Token* localTypeTok = skipScopeIdentifiers(tok);
const Token* localVarTok = NULL;
if (Token::Match(localTypeTok, "%type% <")) {
const Token* closeTok = NULL;
bool found = findClosingBracket(localTypeTok->next(), 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->next());
}
if (isSimpleVariable(localVarTok)) {
vartok = localVarTok;
typetok = localTypeTok;
isArray = false;
} else if (isArrayVariable(localVarTok)) {
vartok = localVarTok;
typetok = localTypeTok;
isArray = true;
} else if ((isLocal() || type == Scope::eFunction) &&
Token::Match(localVarTok, "%var% (") &&
Token::simpleMatch(localVarTok->next()->link(), ") ;")) {
vartok = localVarTok;
typetok = localTypeTok;
isArray = false;
}
return NULL != vartok;
}
bool Scope::isSimpleVariable(const Token* tok) const
{
return Token::Match(tok, "%var% ;|=");
}
bool Scope::isArrayVariable(const Token* tok) const
{
return Token::Match(tok, "%var% [") && tok->next()->str() != "operator";
}
bool Scope::findClosingBracket(const Token* tok, const Token*& close) const
{
bool found = false;
if (NULL != tok && tok->str() == "<") {
unsigned int depth = 0;
for (close = tok; (close != NULL) && (close->str() != ";") && (close->str() != "="); close = close->next()) {
if (close->str() == "<") {
++depth;
} else if (close->str() == ">") {
if (--depth == 0) {
found = true;
break;
}
}
}
}
return found;
}
//---------------------------------------------------------------------------
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 and functions
if (scope->type == Scope::eNamespace || scope->type == Scope::eFunction || scope->type == Scope::eGlobal)
continue;
// do the names match?
if (scope->className == type->str()) {
// check if type does not have a namespace
if (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;
}
//---------------------------------------------------------------------------
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;
}
Reference in New Issue View Git Blame Copy Permalink