/** parse scopes recursively */
bool CheckAssignIf::assignIfParseScope(const Token * const assignTok,
const Token * const startTok,
const unsigned int varid,
const bool islocal,
const char bitop,
const MathLib::bigint num)
{
for (const Token *tok2 = startTok; tok2; tok2 = tok2->next()) {
if (Token::Match(tok2->tokAt(2), "%varid% %cop% %num% ;", varid) && tok2->strAt(3) == std::string(1U, bitop)) {
const MathLib::bigint num2 = MathLib::toLongNumber(tok2->strAt(4));
if ((bitop == '&') && (0 == (num & num2)))
mismatchingBitAndError(assignTok, num, tok2, num2);
}
if (Token::Match(tok2, "%varid% =", varid)) {
if (Token::Match(tok2->tokAt(2), "%varid% %cop% %num% ;", varid) && tok2->strAt(3) == std::string(1U, bitop)) {
const MathLib::bigint num2 = MathLib::toLongNumber(tok2->strAt(4));
if ((bitop == '&') && (0 == (num & num2)))
mismatchingBitAndError(assignTok, num, tok2, num2);
}
return true;
}
if (Token::Match(tok2, "[(,] &| %varid% [,)]", varid))
return true;
if (tok2->str() == "}")
return false;
if (!islocal && Token::Match(tok2, "%var% (") && !Token::simpleMatch(tok2->next()->link(), ") {"))
return true;
if (Token::Match(tok2, "if|while (")) {
if (!islocal && tok2->str() == "while")
continue;
// parse condition
const Token * const end = tok2->next()->link();
for (; tok2 != end; tok2 = tok2->next()) {
if (Token::Match(tok2, "[(,] &| %varid% [,)]", varid)) {
return true;
}
if (Token::Match(tok2,"&&|%oror%|( %varid% %any% %num% &&|%oror%|)", varid)) {
const Token *vartok = tok2->next();
const std::string& op(vartok->strAt(1));
const MathLib::bigint num2 = MathLib::toLongNumber(vartok->strAt(2));
const std::string condition(vartok->str() + op + vartok->strAt(2));
if (op == "==" && (num & num2) != ((bitop=='&') ? num2 : num))
assignIfError(assignTok, tok2, condition, false);
else if (op == "!=" && (num & num2) != ((bitop=='&') ? num2 : num))
assignIfError(assignTok, tok2, condition, true);
}
}
bool ret1 = assignIfParseScope(assignTok, end->tokAt(2), varid, islocal, bitop, num);
bool ret2 = false;
if (Token::simpleMatch(end->next()->link(), "} else {"))
ret2 = assignIfParseScope(assignTok, end->next()->link()->tokAt(3), varid, islocal, bitop, num);
if (ret1 || ret2)
return true;
}
}
return false;
}
void CheckAssignIf::assignIf()
{
if (!_settings->isEnabled("style"))
return;
const SymbolDatabase *symbolDatabase = _tokenizer->getSymbolDatabase();
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
if (tok->str() != "=")
continue;
if (Token::Match(tok->tokAt(-2), "[;{}] %var% =")) {
const unsigned int varid(tok->previous()->varId());
if (varid == 0)
continue;
char bitop = '\0';
MathLib::bigint num = 0;
if (Token::Match(tok->next(), "%num% [&|]")) {
bitop = tok->strAt(2).at(0);
num = MathLib::toLongNumber(tok->next()->str());
} else {
const Token * const endToken = Token::findsimplematch(tok, ";");
if (endToken && Token::Match(endToken->tokAt(-2), "[&|] %num% ;")) {
bitop = endToken->strAt(-2).at(0);
num = MathLib::toLongNumber(endToken->previous()->str());
}
}
if (bitop == '\0')
continue;
if (num < 0 && bitop == '|')
continue;
bool islocal = false;
const Variable *var = symbolDatabase->getVariableFromVarId(varid);
if (var && var->isLocal())
islocal = true;
assignIfParseScope(tok, tok->tokAt(4), varid, islocal, bitop, num);
}
}
}
void CheckAssignIf::assignIf()
{
if (!_settings->isEnabled("style"))
return;
for (const Token *tok = _tokenizer->tokens(); tok; tok = tok->next()) {
if (tok->str() != "=")
continue;
if (Token::Match(tok->tokAt(-2), "[;{}] %var% =")) {
const Variable *var = tok->previous()->variable();
if (var == 0)
continue;
char bitop = '\0';
MathLib::bigint num = 0;
if (Token::Match(tok->next(), "%num% [&|]")) {
bitop = tok->strAt(2).at(0);
num = MathLib::toLongNumber(tok->next()->str());
} else {
const Token *endToken = Token::findsimplematch(tok, ";");
// Casting address
if (Token::Match(endToken->tokAt(-4), "* ) & %any% ;"))
endToken = NULL;
if (endToken && Token::Match(endToken->tokAt(-2), "[&|] %num% ;")) {
bitop = endToken->strAt(-2).at(0);
num = MathLib::toLongNumber(endToken->previous()->str());
}
}
if (bitop == '\0')
continue;
if (num < 0 && bitop == '|')
continue;
assignIfParseScope(tok, tok->tokAt(4), var->declarationId(), var->isLocal(), bitop, num);
}
}
}
/** parse scopes recursively */
bool CheckCondition::assignIfParseScope(const Token * const assignTok,
const Token * const startTok,
const unsigned int varid,
const bool islocal,
const char bitop,
const MathLib::bigint num)
{
bool ret = false;
for (const Token *tok2 = startTok; tok2; tok2 = tok2->next()) {
if ((bitop == '&') && Token::Match(tok2->tokAt(2), "%varid% %cop% %num% ;", varid) && tok2->strAt(3) == std::string(1U, bitop)) {
const MathLib::bigint num2 = MathLib::toLongNumber(tok2->strAt(4));
if (0 == (num & num2))
mismatchingBitAndError(assignTok, num, tok2, num2);
}
if (Token::Match(tok2, "%varid% =", varid)) {
return true;
}
if (Token::Match(tok2, "++|-- %varid%", varid) || Token::Match(tok2, "%varid% ++|--", varid))
return true;
if (Token::Match(tok2, "[(,] &| %varid% [,)]", varid)) {
unsigned int argumentNumber = 0;
const Token *ftok;
for (ftok = tok2; ftok && ftok->str() != "("; ftok = ftok->previous()) {
if (ftok->str() == ")")
ftok = ftok->link();
else if (ftok->str() == ",")
argumentNumber++;
}
ftok = ftok ? ftok->previous() : nullptr;
if (!(ftok && ftok->function()))
return true;
const Variable *par = ftok->function()->getArgumentVar(argumentNumber);
if (par == nullptr || par->isReference() || par->isPointer())
return true;
}
if (tok2->str() == "}")
return false;
if (Token::Match(tok2, "break|continue|return"))
ret = true;
if (ret && tok2->str() == ";")
return false;
if (!islocal && Token::Match(tok2, "%name% (") && !Token::simpleMatch(tok2->next()->link(), ") {"))
return true;
if (Token::Match(tok2, "if|while (")) {
if (!islocal && tok2->str() == "while")
continue;
// parse condition
const Token * const end = tok2->next()->link();
for (; tok2 != end; tok2 = tok2->next()) {
if (Token::Match(tok2, "[(,] &| %varid% [,)]", varid)) {
return true;
}
if (Token::Match(tok2,"&&|%oror%|( %varid% %any% %num% &&|%oror%|)", varid)) {
const Token *vartok = tok2->next();
const std::string& op(vartok->strAt(1));
const MathLib::bigint num2 = MathLib::toLongNumber(vartok->strAt(2));
const std::string condition(vartok->str() + op + vartok->strAt(2));
if (op == "==" && (num & num2) != ((bitop=='&') ? num2 : num))
assignIfError(assignTok, tok2, condition, false);
else if (op == "!=" && (num & num2) != ((bitop=='&') ? num2 : num))
assignIfError(assignTok, tok2, condition, true);
}
if (Token::Match(tok2, "%varid% %op%", varid) && tok2->next()->isAssignmentOp()) {
return true;
}
}
bool ret1 = assignIfParseScope(assignTok, end->tokAt(2), varid, islocal, bitop, num);
bool ret2 = false;
if (Token::simpleMatch(end->next()->link(), "} else {"))
ret2 = assignIfParseScope(assignTok, end->next()->link()->tokAt(3), varid, islocal, bitop, num);
if (ret1 || ret2)
return true;
}
}
return false;
}
/** parse scopes recursively */
bool CheckCondition::assignIfParseScope(const Token * const assignTok,
const Token * const startTok,
const unsigned int varid,
const bool islocal,
const char bitop,
const MathLib::bigint num)
{
bool ret = false;
for (const Token *tok2 = startTok; tok2; tok2 = tok2->next()) {
if ((bitop == '&') && Token::Match(tok2->tokAt(2), "%varid% %cop% %num% ;", varid) && tok2->strAt(3) == std::string(1U, bitop)) {
const MathLib::bigint num2 = MathLib::toLongNumber(tok2->strAt(4));
if (0 == (num & num2))
mismatchingBitAndError(assignTok, num, tok2, num2);
}
if (Token::Match(tok2, "%varid% =", varid)) {
return true;
}
if (Token::Match(tok2, "++|-- %varid%", varid) || Token::Match(tok2, "%varid% ++|--", varid))
return true;
if (Token::Match(tok2, "[(,] &| %varid% [,)]", varid) && isParameterChanged(tok2))
return true;
if (tok2->str() == "}")
return false;
if (Token::Match(tok2, "break|continue|return"))
ret = true;
if (ret && tok2->str() == ";")
return false;
if (!islocal && Token::Match(tok2, "%name% (") && !Token::simpleMatch(tok2->next()->link(), ") {"))
return true;
if (Token::Match(tok2, "if|while (")) {
if (!islocal && tok2->str() == "while")
continue;
if (tok2->str() == "while") {
// is variable changed in loop?
const Token *bodyStart = tok2->linkAt(1)->next();
const Token *bodyEnd = bodyStart ? bodyStart->link() : nullptr;
if (!bodyEnd || bodyEnd->str() != "}" || isVariableChanged(bodyStart, bodyEnd, varid, _settings))
continue;
}
// parse condition
const Token * const end = tok2->next()->link();
for (; tok2 != end; tok2 = tok2->next()) {
if (Token::Match(tok2, "[(,] &| %varid% [,)]", varid)) {
return true;
}
if (Token::Match(tok2,"&&|%oror%|( %varid% %any% %num% &&|%oror%|)", varid)) {
const Token *vartok = tok2->next();
const std::string& op(vartok->strAt(1));
const MathLib::bigint num2 = MathLib::toLongNumber(vartok->strAt(2));
const std::string condition(vartok->str() + op + vartok->strAt(2));
if (op == "==" && (num & num2) != ((bitop=='&') ? num2 : num))
assignIfError(assignTok, tok2, condition, false);
else if (op == "!=" && (num & num2) != ((bitop=='&') ? num2 : num))
assignIfError(assignTok, tok2, condition, true);
}
if (Token::Match(tok2, "%varid% %op%", varid) && tok2->next()->isAssignmentOp()) {
return true;
}
}
bool ret1 = assignIfParseScope(assignTok, end->tokAt(2), varid, islocal, bitop, num);
bool ret2 = false;
if (Token::simpleMatch(end->next()->link(), "} else {"))
ret2 = assignIfParseScope(assignTok, end->next()->link()->tokAt(3), varid, islocal, bitop, num);
if (ret1 || ret2)
return true;
}
}
return false;
}
