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Refactoring handling of if conditions in CheckMemoryLeak

This commit is contained in:
Daniel Marjamäki 2015-07-22 16:45:14 +02:00
parent 258e3b9dc3
commit b38062743d
1 changed files with 20 additions and 11 deletions
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31
lib/checkmemoryleak.cpp
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@ -527,6 +527,17 @@ static bool notvar(const Token *tok, unsigned int varid)
return vartok && (vartok->varId() == varid);
}
static bool ifvar(const Token *tok, unsigned int varid, const std::string &comp, const std::string &rhs)
{
if (!Token::simpleMatch(tok, "if ("))
return false;
const Token * const condition = tok->next()->astOperand2();
if (!condition || condition->str() == "&&")
return false;
const Token *vartok = nullptr;
Token::findVariableComparison(condition, comp, rhs, &vartok);
return (vartok && vartok->varId() == varid);
}
bool CheckMemoryLeakInFunction::test_white_list(const std::string &funcname, const Settings *settings, bool cpp)
@ -967,30 +978,28 @@ Token *CheckMemoryLeakInFunction::getcode(const Token *tok, std::list<const Toke
// if else switch
if (Token::simpleMatch(tok, "if (")) {
if (alloctype == Fd) {
if (Token::Match(tok, "if ( 0|-1 <=|< %varid% )", varid) ||
Token::Match(tok, "if ( %varid% >|>= 0|-1 )", varid) ||
Token::Match(tok, "if ( %varid% != -1 )", varid) ||
Token::Match(tok, "if ( -1 != %varid% )", varid)) {
if (ifvar(tok, varid, ">", "-1") ||
ifvar(tok, varid, ">=", "0") ||
ifvar(tok, varid, ">", "0") ||
ifvar(tok, varid, "!=", "-1")) {
addtoken(&rettail, tok, "if(var)");
tok = tok->next()->link();
continue;
} else if (Token::Match(tok, "if ( %varid% == -1 )", varid) ||
Token::Match(tok, "if ( -1 == %varid% )", varid) ||
Token::Match(tok, "if ( %varid% < 0 )", varid) ||
Token::Match(tok, "if ( 0 > %varid% )", varid)) {
} else if (ifvar(tok, varid, "==", "-1") ||
ifvar(tok, varid, "<", "0")) {
addtoken(&rettail, tok, "if(!var)");
tok = tok->next()->link();
continue;
}
}
if (Token::Match(tok, "if ( %varid% )", varid)) {
if (ifvar(tok, varid, "!=", "0")) {
addtoken(&rettail, tok, "if(var)");
// Make sure the "use" will not be added
tok = tok->next()->link();
continue;
} else if (Token::simpleMatch(tok, "if (") && notvar(tok->next()->astOperand2(), varid)) {
} else if (ifvar(tok, varid, "==", "0")) {
addtoken(&rettail, tok, "if(!var)");
// parse the if-body.
@ -2589,7 +2598,7 @@ void CheckMemoryLeakStructMember::checkStructVariable(const Variable * const var
}
// succeeded allocation
else if (Token::Match(tok3, "if ( %var% . %varid% ) {", structmemberid)) {
else if (ifvar(tok3, structmemberid, "!=", "0")) {
// goto the ")"
tok3 = tok3->next()->link();