Method sprintfOverlappingData

lib/checkstring.cpp:423–458

--------------------------------------------------------------------------- Overlapping source and destination passed to sprintf(). TODO: Library configuration for overlapping arguments ---------------------------------------------------------------------------

// TODO: Library configuration for overlapping arguments
//---------------------------------------------------------------------------
void CheckStringImpl::sprintfOverlappingData()
{
    logChecker("CheckString::sprintfOverlappingData");

    const SymbolDatabase* symbolDatabase = mTokenizer->getSymbolDatabase();
    for (const Scope * scope : symbolDatabase->functionScopes) {
        for (const Token* tok = scope->bodyStart->next(); tok != scope->bodyEnd; tok = tok->next()) {
            if (!Token::Match(tok, "sprintf|snprintf|swprintf ("))
                continue;

            const std::vector<const Token *> args = getArguments(tok);

            const int formatString = Token::simpleMatch(tok, "sprintf") ? 1 : 2;
            for (unsigned int argnr = formatString + 1; argnr < args.size(); ++argnr) {
                const Token *dest = args[0];
                while (dest->isCast())
                    dest = dest->astOperand2() ? dest->astOperand2() : dest->astOperand1();
                const Token *arg = args[argnr];
                if (!arg->valueType() || arg->valueType()->pointer != 1)
                    continue;
                while (arg->isCast())
                    arg = arg->astOperand2() ? arg->astOperand2() : arg->astOperand1();

                const bool same = isSameExpression(false,
                                                   dest,
                                                   arg,
                                                   mSettings,
                                                   true,
                                                   false);
                if (same) {
                    sprintfOverlappingDataError(tok, args[argnr], arg->expressionString());
                }
            }
        }
    }
}

void CheckStringImpl::sprintfOverlappingDataError(const Token *funcTok, const Token *tok, const std::string &varname)
{