Method suspiciousSizeofCalculation

lib/checksizeof.cpp:398–426

----------------------------------------------------------------------------- Check for code like sizeof()*sizeof() or sizeof(ptr)/value -----------------------------------------------------------------------------

// Check for code like sizeof()*sizeof() or sizeof(ptr)/value
//-----------------------------------------------------------------------------
void CheckSizeofImpl::suspiciousSizeofCalculation()
{
    if (!mSettings.severity.isEnabled(Severity::warning) || !mSettings.certainty.isEnabled(Certainty::inconclusive))
        return;

    logChecker("CheckSizeof::suspiciousSizeofCalculation"); // warning,inconclusive

    for (const Token *tok = mTokenizer->tokens(); tok; tok = tok->next()) {
        if (Token::simpleMatch(tok, "sizeof (")) {
            const Token* lPar = tok->astParent();
            if (lPar && lPar->str() == "(") {
                const Token* const rPar = lPar->link();
                const Token* varTok = lPar->astOperand2();
                int derefCount = 0;
                while (Token::Match(varTok, "[|*")) {
                    ++derefCount;
                    varTok = varTok->astOperand1();
                }
                if (lPar->astParent() && lPar->astParent()->str() == "/") {
                    const Variable* var = varTok ? varTok->variable() : nullptr;
                    if (var && var->isPointer() && !var->isArray() && !(var->valueType() && var->valueType()->pointer <= derefCount))
                        divideSizeofError(tok);
                }
                else if (Token::simpleMatch(rPar, ") * sizeof") && rPar->next()->astOperand1() == tok->next())
                    multiplySizeofError(tok);
            }
        }
    }
}

void CheckSizeofImpl::multiplySizeofError(const Token *tok)
{