{

const bool checkAlloca = mSettings->severity.isEnabled(Severity::warning) && ((mTokenizer->isC() && mSettings->standards.c >= Standards::C99) || mSettings->standards.cpp >= Standards::CPP11);

logChecker("CheckFunctions::checkProhibitedFunctions");

const SymbolDatabase *symbolDatabase = mTokenizer->getSymbolDatabase();

for (const Scope *scope : symbolDatabase->functionScopes) {

for (const Token* tok = scope->bodyStart; tok != scope->bodyEnd; tok = tok->next()) {

if (!Token::Match(tok, "%name% (") && tok->varId() == 0)

continue;

// alloca() is special as it depends on the code being C or C++, so it is not in Library

if (checkAlloca && Token::simpleMatch(tok, "alloca (") && (!tok->function() || tok->function()->nestedIn->type == ScopeType::eGlobal)) {

if (tok->isC()) {

if (mSettings->standards.c > Standards::C89)

reportError(tok, Severity::warning, "allocaCalled",

"$symbol:alloca\n"

"Obsolete function 'alloca' called. In C99 and later it is recommended to use a variable length array instead.\n"

"The obsolete function 'alloca' is called. In C99 and later it is recommended to use a variable length array or "

"a dynamically allocated array instead. The function 'alloca' is dangerous for many reasons "

"(http://stackoverflow.com/questions/1018853/why-is-alloca-not-considered-good-practice and http://linux.die.net/man/3/alloca).");

} else

reportError(tok, Severity::warning, "allocaCalled",

"$symbol:alloca\n"

"Obsolete function 'alloca' called.\n"

"The obsolete function 'alloca' is called. In C++11 and later it is recommended to use std::array<> or "

"a dynamically allocated array instead. The function 'alloca' is dangerous for many reasons "

"(http://stackoverflow.com/questions/1018853/why-is-alloca-not-considered-good-practice and http://linux.die.net/man/3/alloca).");

} else {

if (tok->function() && tok->function()->hasBody())

continue;

const Library::WarnInfo* wi = mSettings->library.getWarnInfo(tok);

if (wi) {

if (mSettings->severity.isEnabled(wi->severity) && ((tok->isC() && mSettings->standards.c >= wi->standards.c) || (tok->isCpp() && mSettings->standards.cpp >= wi->standards.cpp))) {

const std::string daca = mSettings->daca ? "prohibited" : "";

reportError(tok, wi->severity, daca + tok->str() + "Called", wi->message, CWE477, Certainty::normal);

}

}

}

}

}

{

logChecker("CheckFunctions::invalidFunctionUsage");

const SymbolDatabase* symbolDatabase = mTokenizer->getSymbolDatabase();

for (const Scope *scope : symbolDatabase->functionScopes) {

for (const Token* tok = scope->bodyStart->next(); tok != scope->bodyEnd; tok = tok->next()) {

tok = skipUnreachableBranch(tok);

if (!Token::Match(tok, "%name% ( !!)"))

continue;

const Token * const functionToken = tok;

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

for (int argnr = 1; argnr <= arguments.size(); ++argnr) {

const Token * const argtok = arguments[argnr-1];

// check <valid>...</valid>

const ValueFlow::Value *invalidValue = argtok->getInvalidValue(functionToken,argnr,*mSettings);

if (invalidValue) {

invalidFunctionArgError(argtok, functionToken->next()->astOperand1()->expressionString(), argnr, invalidValue, mSettings->library.validarg(functionToken, argnr));

}

if (astIsBool(argtok)) {

// check <not-bool>

if (mSettings->library.isboolargbad(functionToken, argnr))

invalidFunctionArgBoolError(argtok, functionToken->str(), argnr);

// Are the values 0 and 1 valid?

else if (!mSettings->library.isIntArgValid(functionToken, argnr, 0, *mSettings))

invalidFunctionArgError(argtok, functionToken->str(), argnr, nullptr, mSettings->library.validarg(functionToken, argnr));

else if (!mSettings->library.isIntArgValid(functionToken, argnr, 1, *mSettings))

invalidFunctionArgError(argtok, functionToken->str(), argnr, nullptr, mSettings->library.validarg(functionToken, argnr));

}

// check <strz>

if (mSettings->library.isargstrz(functionToken, argnr)) {

if (Token::Match(argtok, "& %var% !![") && argtok->next() && argtok->next()->valueType()) {

const ValueType * valueType = argtok->next()->valueType();

const Variable * variable = argtok->next()->variable();

if ((valueType->type == ValueType::Type::CHAR || valueType->type == ValueType::Type::WCHAR_T || (valueType->type == ValueType::Type::RECORD && Token::Match(argtok, "& %var% . %var% ,|)"))) &&

!variable->isArray() &&

(variable->isConst() || !variable->isGlobal()) &&

(!argtok->next()->hasKnownValue() || argtok->next()->getValue(0) == nullptr)) {

invalidFunctionArgStrError(argtok, functionToken->str(), argnr);

}

}

const ValueType* const valueType = argtok->valueType();

const Variable* const variable = argtok->variable();

// Is non-null terminated local variable of type char (e.g. char buf[] = {'x'};) ?

if (variable && variable->isLocal()

&& valueType && (valueType->type == ValueType::Type::CHAR || valueType->type == ValueType::Type::WCHAR_T)

&& !isVariablesChanged(variable->declEndToken(), functionToken, 0 /*indirect*/, { variable }, *mSettings)) {

const Token* varTok = variable->declEndToken();

MathLib::bigint count = -1; // Find out explicitly set count, e.g.: char buf[3] = {...}. Variable 'count' is set to 3 then.

if (varTok && Token::simpleMatch(varTok->astOperand1(), "["))

{

const Token* const countTok = varTok->astOperand1()->astOperand2();

if (countTok && countTok->hasKnownIntValue())

count = countTok->getKnownIntValue();

}

if (Token::simpleMatch(varTok, "= {")) {

varTok = varTok->tokAt(1);

auto charsUntilFirstZero = 0;

bool search = true;

while (search && varTok && !Token::simpleMatch(varTok->next(), "}")) {

varTok = varTok->next();

if (!Token::simpleMatch(varTok, ",")) {

if (Token::Match(varTok, "%op%")) {

varTok = varTok->next();

continue;

}

++charsUntilFirstZero;

if (varTok && varTok->hasKnownIntValue() && varTok->getKnownIntValue() == 0)

search=false; // stop counting for cases like char buf[3] = {'x', '\0', 'y'};

}

}

if (varTok && varTok->hasKnownIntValue() && varTok->getKnownIntValue() != 0

&& (count == -1 || (count > 0 && count <= charsUntilFirstZero))) {

invalidFunctionArgStrError(argtok, functionToken->str(), argnr);

}

} else if (count > -1 && Token::Match(varTok, "= %str%")) {

const Token* strTok = varTok->getValueTokenMinStrSize(*mSettings);

if (strTok) {

const int strSize = Token::getStrArraySize(strTok);

if (strSize > count && strTok->str().find('\0') == std::string::npos)

invalidFunctionArgStrError(argtok, functionToken->str(), argnr);

}

}

}

}

}

}

}

{

std::ostringstream errmsg;

errmsg << "$symbol:" << functionName << '\n';

if (invalidValue && invalidValue->condition)

errmsg << ValueFlow::eitherTheConditionIsRedundant(invalidValue->condition)

<< " or $symbol() argument nr " << argnr << " can have invalid value.";

else

errmsg << "Invalid $symbol() argument nr " << argnr << '.';

if (invalidValue)

errmsg << " The value is " << std::setprecision(10) << (invalidValue->isIntValue() ? invalidValue->intvalue : invalidValue->floatValue) << " but the valid values are '" << validstr << "'.";

else

errmsg << " The value is 0 or 1 (boolean) but the valid values are '" << validstr << "'.";

if (invalidValue)

reportError(getErrorPath(tok, invalidValue, "Invalid argument"),

invalidValue->errorSeverity() && invalidValue->isKnown() ? Severity::error : Severity::warning,

"invalidFunctionArg",

errmsg.str(),

CWE628,

invalidValue->isInconclusive() ? Certainty::inconclusive : Certainty::normal);

else

reportError(tok,

Severity::error,

"invalidFunctionArg",

errmsg.str(),

CWE628,

Certainty::normal);

{

std::ostringstream errmsg;

errmsg << "$symbol:" << functionName << '\n';

errmsg << "Invalid $symbol() argument nr " << argnr << ". A non-boolean value is required.";

reportError(tok, Severity::error, "invalidFunctionArgBool", errmsg.str(), CWE628, Certainty::normal);

{

std::ostringstream errmsg;

errmsg << "$symbol:" << functionName << '\n';

errmsg << "Invalid $symbol() argument nr " << argnr << ". A nul-terminated string is required.";

reportError(tok, Severity::error, "invalidFunctionArgStr", errmsg.str(), CWE628, Certainty::normal);

{

if (!mSettings->severity.isEnabled(Severity::warning) &&

!mSettings->severity.isEnabled(Severity::style) &&

!mSettings->isPremiumEnabled("ignoredReturnValue"))

return;

logChecker("CheckFunctions::checkIgnoredReturnValue"); // style,warning

const SymbolDatabase *symbolDatabase = mTokenizer->getSymbolDatabase();

for (const Scope *scope : symbolDatabase->functionScopes) {

for (const Token* tok = scope->bodyStart->next(); tok != scope->bodyEnd; tok = tok->next()) {

// skip c++11 initialization, ({...})

if (Token::Match(tok, "%var%|(|,|return {"))

tok = tok->linkAt(1);

else if (Token::Match(tok, "[(<]") && tok->link())

tok = tok->link();

if (tok->varId() || tok->isKeyword() || tok->isStandardType() || !Token::Match(tok, "%name% ("))

continue;

const Token *parent = tok->next()->astParent();

while (Token::Match(parent, "%cop%")) {

if (Token::Match(parent, "<<|>>|*") && !parent->astParent())

break;

parent = parent->astParent();

}

if (parent)

continue;

if (!tok->scope()->isExecutable()) {

tok = tok->scope()->bodyEnd;

continue;

}

if ((!tok->function() || !Token::Match(tok->function()->retDef, "void %name%")) &&

tok->next()->astOperand1()) {

const Library::UseRetValType retvalTy = mSettings->library.getUseRetValType(tok);

const bool warn = (tok->function() && (tok->function()->isAttributeNodiscard() || tok->function()->isAttributePure() || tok->function()->isAttributeConst())) ||

// avoid duplicate warnings for resource-allocating functions

(retvalTy == Library::UseRetValType::DEFAULT && mSettings->library.getAllocFuncInfo(tok) == nullptr);

if (mSettings->severity.isEnabled(Severity::warning) && warn)

ignoredReturnValueError(tok, tok->next()->astOperand1()->expressionString());

else if (mSettings->severity.isEnabled(Severity::style) &&

retvalTy == Library::UseRetValType::ERROR_CODE)

ignoredReturnErrorCode(tok, tok->next()->astOperand1()->expressionString());

}

}

}

{

reportError(tok, Severity::warning, "ignoredReturnValue",

"$symbol:" + function + "\nReturn value of function $symbol() is not used.", CWE252, Certainty::normal);

{

reportError(tok, Severity::style, "ignoredReturnErrorCode",

"$symbol:" + function + "\nError code from the return value of function $symbol() is not used.", CWE252, Certainty::normal);

{

logChecker("CheckFunctions::checkMissingReturn");

const SymbolDatabase *symbolDatabase = mTokenizer->getSymbolDatabase();

for (const Scope *scope : symbolDatabase->functionScopes) {

const Function *function = scope->function;

if (!function || !function->hasBody())

continue;

if (function->name() == "main" && !(mTokenizer->isC() && mSettings->standards.c < Standards::C99))

continue;

if (function->type != FunctionType::eFunction && function->type != FunctionType::eOperatorEqual)

continue;

if (Token::Match(function->retDef, "%name% (") && function->retDef->isUpperCaseName())

continue;

if (Function::returnsVoid(function, true))

continue;

const Token *errorToken = checkMissingReturnScope(scope->bodyEnd, mSettings->library);

if (errorToken)

missingReturnError(errorToken);

}

{

if (!Token::Match(gotoToken, "goto %name% ;"))

return false;

for (const Token *prev = gotoToken; gotoToken; gotoToken = gotoToken->previous()) {

if (Token::Match(prev, "%name% :") && prev->str() == gotoToken->strAt(1))

return true;

if (prev->str() == "{" && prev->scope()->type == ScopeType::eFunction)

return false;

}

return false;

{

reportError(tok, Severity::error, "missingReturn",

"Found an exit path from function with non-void return type that has missing return statement", CWE758, Certainty::normal);

{

const bool styleC99 = mSettings->severity.isEnabled(Severity::style) && ((mTokenizer->isC() && mSettings->standards.c != Standards::C89) || (mTokenizer->isCPP() && mSettings->standards.cpp != Standards::CPP03));

const bool printWarnings = mSettings->severity.isEnabled(Severity::warning);

if (!styleC99 && !printWarnings && !mSettings->isPremiumEnabled("wrongmathcall"))

return;

logChecker("CheckFunctions::checkMathFunctions"); // style,warning,c99,c++11

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 (tok->varId())

continue;

if (printWarnings && Token::Match(tok, "%name% ( !!)")) {

if (tok->strAt(-1) != "."

&& Token::Match(tok, "log|logf|logl|log10|log10f|log10l|log2|log2f|log2l ( %num% )")) {

const std::string& number = tok->strAt(2);

if ((MathLib::isInt(number) && MathLib::toBigNumber(number) <= 0) ||

(MathLib::isFloat(number) && MathLib::toDoubleNumber(number) <= 0.))

mathfunctionCallWarning(tok);

} else if (Token::Match(tok, "log1p|log1pf|log1pl ( %num% )")) {

const std::string& number = tok->strAt(2);

if ((MathLib::isInt(number) && MathLib::toBigNumber(number) <= -1) ||

(MathLib::isFloat(number) && MathLib::toDoubleNumber(number) <= -1.))

mathfunctionCallWarning(tok);

}

// atan2 ( x , y): x and y can not be zero, because this is mathematically not defined

else if (Token::Match(tok, "atan2|atan2f|atan2l ( %num% , %num% )")) {

if (MathLib::isNullValue(tok->strAt(2)) && MathLib::isNullValue(tok->strAt(4)))

mathfunctionCallWarning(tok, 2);

}

// fmod ( x , y) If y is zero, then either a range error will occur or the function will return zero (implementation-defined).

else if (Token::Match(tok, "fmod|fmodf|fmodl (")) {

const Token* nextArg = tok->tokAt(2)->nextArgument();

if (nextArg && MathLib::isNullValue(nextArg->str()))

mathfunctionCallWarning(tok, 2);

}

// pow ( x , y) If x is zero, and y is negative --> division by zero

else if (Token::Match(tok, "pow|powf|powl ( %num% , %num% )")) {

if (MathLib::isNullValue(tok->strAt(2)) && MathLib::isNegative(tok->strAt(4)))

mathfunctionCallWarning(tok, 2);

}

}

if (styleC99) {

if (Token::Match(tok, "%num% - erf (") && Tokenizer::isOneNumber(tok->str()) && tok->next()->astOperand2() == tok->tokAt(3)) {

mathfunctionCallWarning(tok, "1 - erf(x)", "erfc(x)");

} else if (Token::simpleMatch(tok, "exp (") && Token::Match(tok->linkAt(1), ") - %num%") && Tokenizer::isOneNumber(tok->linkAt(1)->strAt(2)) && tok->linkAt(1)->next()->astOperand1() == tok->next()) {

mathfunctionCallWarning(tok, "exp(x) - 1", "expm1(x)");

} else if (Token::simpleMatch(tok, "log (") && tok->next()->astOperand2()) {

const Token* plus = tok->next()->astOperand2();

if (plus->str() == "+" && ((plus->astOperand1() && Tokenizer::isOneNumber(plus->astOperand1()->str())) || (plus->astOperand2() && Tokenizer::isOneNumber(plus->astOperand2()->str()))))

mathfunctionCallWarning(tok, "log(1 + x)", "log1p(x)");

}

}

}

}

{

if (tok) {

if (numParam == 1)

reportError(tok, Severity::warning, "wrongmathcall", "$symbol:" + tok->str() + "\nPassing value " + tok->strAt(2) + " to $symbol() leads to implementation-defined result.", CWE758, Certainty::normal);

else if (numParam == 2)

reportError(tok, Severity::warning, "wrongmathcall", "$symbol:" + tok->str() + "\nPassing values " + tok->strAt(2) + " and " + tok->strAt(4) + " to $symbol() leads to implementation-defined result.", CWE758, Certainty::normal);

} else

reportError(tok, Severity::warning, "wrongmathcall", "Passing value '#' to #() leads to implementation-defined result.", CWE758, Certainty::normal);

{

if (!mSettings->severity.isEnabled(Severity::warning))

return;

logChecker("CheckFunctions::memsetZeroBytes"); // warning

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, "memset|wmemset (") && (numberOfArguments(tok)==3)) {

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

if (WRONG_DATA(arguments.size() != 3U, tok))

continue;

const Token* lastParamTok = arguments[2];

if (MathLib::isNullValue(lastParamTok->str()))

memsetZeroBytesError(tok);

}

}

}

{

const std::string summary("memset() called to fill 0 bytes.");

const std::string verbose(summary + " The second and third arguments might be inverted."

" The function memset ( void * ptr, int value, size_t num ) sets the"

" first num bytes of the block of memory pointed by ptr to the specified value.");

reportError(tok, Severity::warning, "memsetZeroBytes", summary + "\n" + verbose, CWE687, Certainty::normal);

{

const bool printPortability = mSettings->severity.isEnabled(Severity::portability);

const bool printWarning = mSettings->severity.isEnabled(Severity::warning);

if (!printWarning && !printPortability)

return;

logChecker("CheckFunctions::memsetInvalid2ndParam"); // warning,portability

const SymbolDatabase *symbolDatabase = mTokenizer->getSymbolDatabase();

for (const Scope *scope : symbolDatabase->functionScopes) {

for (const Token* tok = scope->bodyStart->next(); tok && (tok != scope->bodyEnd); tok = tok->next()) {

if (!Token::simpleMatch(tok, "memset ("))

continue;

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

if (args.size() != 3)

continue;

// Second parameter is zero literal, i.e. 0.0f

const Token * const secondParamTok = args[1];

if (Token::Match(secondParamTok, "%num% ,") && MathLib::isNullValue(secondParamTok->str()))

continue;

// Check if second parameter is a float variable or a float literal != 0.0f

if (printPortability && astIsFloat(secondParamTok,false)) {

memsetFloatError(secondParamTok, secondParamTok->expressionString());

}

if (printWarning && secondParamTok->isNumber()) { // Check if the second parameter is a literal and is out of range

const MathLib::bigint value = MathLib::toBigNumber(secondParamTok);

const long long sCharMin = mSettings->platform.signedCharMin();

const long long uCharMax = mSettings->platform.unsignedCharMax();

if (value < sCharMin || value > uCharMax)

memsetValueOutOfRangeError(secondParamTok, secondParamTok->str());

}

}

}

{

const std::string message("The 2nd memset() argument '" + var_value +

"' is a float, its representation is implementation defined.");

const std::string verbose(message + " memset() is used to set each byte of a block of memory to a specific value and"

" the actual representation of a floating-point value is implementation defined.");

reportError(tok, Severity::portability, "memsetFloat", message + "\n" + verbose, CWE688, Certainty::normal);

{

const std::string message("The 2nd memset() argument '" + value + "' doesn't fit into an 'unsigned char'.");

const std::string verbose(message + " The 2nd parameter is passed as an 'int', but the function fills the block of memory using the 'unsigned char' conversion of this value.");

reportError(tok, Severity::warning, "memsetValueOutOfRange", message + "\n" + verbose, CWE686, Certainty::normal);

{

if (!mSettings->checkLibrary)

return;

bool insideNew = false;

for (const Token *tok = mTokenizer->tokens(); tok; tok = tok->next()) {

if (!tok->scope() || !tok->scope()->isExecutable())

continue;

if (tok->str() == "new")

insideNew = true;

else if (tok->str() == ";")

insideNew = false;

else if (insideNew)

continue;

if (tok->isKeyword() || !Token::Match(tok, "%name% ("))

continue;

if (tok->varId() != 0 || tok->type() || tok->isStandardType())

continue;

if (tok->linkAt(1)->strAt(1) == "(")

continue;

if (tok->function())

continue;

if (Token::simpleMatch(tok->astTop(), "throw"))

continue;

if (Token::simpleMatch(tok->astParent(), ".")) {

const Token* contTok = tok->astParent()->astOperand1();

if (astContainerAction(contTok, mSettings->library) != Library::Container::Action::NO_ACTION)

continue;

if (astContainerYield(contTok, mSettings->library) != Library::Container::Yield::NO_YIELD)

continue;

}

if (!mSettings->library.isNotLibraryFunction(tok))

continue;

const std::string &functionName = mSettings->library.getFunctionName(tok);

if (functionName.empty())

continue;

if (mSettings->library.functions().find(functionName) != mSettings->library.functions().end())

continue;

if (mSettings->library.podtype(tok->expressionString()))

continue;

if (mSettings->library.getTypeCheck("unusedvar", functionName) != Library::TypeCheck::def)

continue;

const Token* start = tok;

while (Token::Match(start->tokAt(-2), "%name% ::") && !start->tokAt(-2)->isKeyword())

start = start->tokAt(-2);

if (mSettings->library.detectContainerOrIterator(start))

continue;

reportError(tok,

Severity::information,

"checkLibraryFunction",

"--check-library: There is no matching configuration for function " + functionName + "()");

}

{

if (!mTokenizer->isCPP() || mSettings->standards.cpp < Standards::CPP11)

return;

if (!mSettings->severity.isEnabled(Severity::performance))

return;

logChecker("CheckFunctions::returnLocalStdMove"); // performance,c++11

const SymbolDatabase *symbolDatabase = mTokenizer->getSymbolDatabase();

for (const Scope *scope : symbolDatabase->functionScopes) {

// Expect return by-value

if (Function::returnsReference(scope->function, /*unknown*/ true, /*includeRValueRef*/ true))

continue;

const auto rets = Function::findReturns(scope->function);

for (const Token* ret : rets) {

if (!Token::simpleMatch(ret->tokAt(-3), "std :: move ("))

continue;

const Token* retval = ret->astOperand2();

// NRVO

if (retval->variable() && retval->variable()->isLocal() && !retval->variable()->isVolatile())

copyElisionError(retval);

// RVO

if (Token::Match(retval, "(|{") && !retval->isCast() && !(retval->valueType() && retval->valueType()->reference != Reference::None))

copyElisionError(retval);

}

}

{

reportError(tok,

Severity::performance,

"returnStdMoveLocal",

"Using std::move for returning object by-value from function will affect copy elision optimization."

" More: https://isocpp.github.io/CppCoreGuidelines/CppCoreGuidelines#Rf-return-move-local");

{

if (!mSettings->severity.isEnabled(Severity::style))

return;

logChecker("CheckFunctions::useStandardLibrary"); // style

for (const Scope& scope: mTokenizer->getSymbolDatabase()->scopeList) {

if (scope.type != ScopeType::eFor)

continue;

const Token *forToken = scope.classDef;

// for ( initToken ; condToken ; stepToken )

const Token* initToken = getInitTok(forToken);

if (!initToken)

continue;

const Token* condToken = getCondTok(forToken);

if (!condToken)

continue;

const Token* stepToken = getStepTok(forToken);

if (!stepToken)

continue;

// 1. we expect that idx variable will be initialized with 0

const Token* idxToken = initToken->astOperand1();

const Token* initVal = initToken->astOperand2();

if (!idxToken || !initVal || !initVal->hasKnownIntValue() || initVal->getKnownIntValue() != 0)

continue;

const auto idxVarId = idxToken->varId();

if (0 == idxVarId)

continue;

// 2. we expect that idx will be less of some variable

if (!condToken->isComparisonOp())

continue;

const auto& secondOp = condToken->str();

const bool isLess = "<" == secondOp &&

isConstExpression(condToken->astOperand2(), mSettings->library) &&

condToken->astOperand1()->varId() == idxVarId;

const bool isMore = ">" == secondOp &&

isConstExpression(condToken->astOperand1(), mSettings->library) &&

condToken->astOperand2()->varId() == idxVarId;

if (!(isLess || isMore))

continue;

// 3. we expect idx incrementing by 1

const bool inc = stepToken->str() == "++" && stepToken->astOperand1() && stepToken->astOperand1()->varId() == idxVarId;

const bool plusOne = stepToken->isBinaryOp() && stepToken->str() == "+=" &&

stepToken->astOperand1()->varId() == idxVarId &&

stepToken->astOperand2()->str() == "1";

if (!inc && !plusOne)

continue;

// technically using void* here is not correct but some compilers could allow it

const Token *tok = scope.bodyStart;

const std::string memcpyName = tok->isCpp() ? "std::memcpy" : "memcpy";

// (reinterpret_cast<uint8_t*>(dest))[i] = (reinterpret_cast<const uint8_t*>(src))[i];

if (Token::Match(tok, "{ (| reinterpret_cast < uint8_t|int8_t|char|void * > ( %var% ) )| [ %varid% ] = "

"(| reinterpret_cast < const| uint8_t|int8_t|char|void * > ( %var% ) )| [ %varid% ] ; }", idxVarId)) {

useStandardLibraryError(tok->next(), memcpyName);

continue;

}

// ((char*)dst)[i] = ((const char*)src)[i];

if (Token::Match(tok, "{ ( ( uint8_t|int8_t|char|void * ) (| %var% ) )| [ %varid% ] = "

"( ( const| uint8_t|int8_t|char|void * ) (| %var% ) )| [ %varid% ] ; }", idxVarId)) {

useStandardLibraryError(tok->next(), memcpyName);

continue;

}

const static std::string memsetName = tok->isCpp() ? "std::memset" : "memset";

// ((char*)dst)[i] = 0;

if (Token::Match(tok, "{ ( ( uint8_t|int8_t|char|void * ) (| %var% ) )| [ %varid% ] = %char%|%num% ; }", idxVarId)) {

useStandardLibraryError(tok->next(), memsetName);

continue;

}

// ((char*)dst)[i] = (const char*)0;

if (Token::Match(tok, "{ ( ( uint8_t|int8_t|char|void * ) (| %var% ) )| [ %varid% ] = "

"( const| uint8_t|int8_t|char ) (| %char%|%num% )| ; }", idxVarId)) {

useStandardLibraryError(tok->next(), memsetName);

continue;

}

// (reinterpret_cast<uint8_t*>(dest))[i] = static_cast<const uint8_t>(0);

if (Token::Match(tok, "{ (| reinterpret_cast < uint8_t|int8_t|char|void * > ( %var% ) )| [ %varid% ] = "

"(| static_cast < const| uint8_t|int8_t|char > ( %char%|%num% ) )| ; }", idxVarId)) {

useStandardLibraryError(tok->next(), memsetName);

continue;

}

// (reinterpret_cast<int8_t*>(dest))[i] = 0;

if (Token::Match(tok, "{ (| reinterpret_cast < uint8_t|int8_t|char|void * > ( %var% ) )| [ %varid% ] = "

"%char%|%num% ; }", idxVarId)) {

useStandardLibraryError(tok->next(), memsetName);

continue;

}

}

{

reportError(tok, Severity::style,

"useStandardLibrary",

"Consider using " + expected + " instead of loop.");

{

CheckFunctions checkFunctions(&tokenizer, &tokenizer.getSettings(), errorLogger);

checkFunctions.checkIgnoredReturnValue();

checkFunctions.checkMissingReturn(); // Missing "return" in exit path

// --check-library : functions with nonmatching configuration

checkFunctions.checkLibraryMatchFunctions();

checkFunctions.checkProhibitedFunctions();

checkFunctions.invalidFunctionUsage();

checkFunctions.checkMathFunctions();

checkFunctions.memsetZeroBytes();

checkFunctions.memsetInvalid2ndParam();

checkFunctions.returnLocalStdMove();

checkFunctions.useStandardLibrary();

{

CheckFunctions c(nullptr, settings, errorLogger);

for (auto i = settings->library.functionwarn().cbegin(); i != settings->library.functionwarn().cend(); ++i) {

c.reportError(nullptr, Severity::style, i->first+"Called", i->second.message);

}

c.invalidFunctionArgError(nullptr, "func_name", 1, nullptr,"1:4");

c.invalidFunctionArgBoolError(nullptr, "func_name", 1);

c.invalidFunctionArgStrError(nullptr, "func_name", 1);

c.ignoredReturnValueError(nullptr, "malloc");

c.ignoredReturnErrorCode(nullptr, "func_name");

c.mathfunctionCallWarning(nullptr);

c.mathfunctionCallWarning(nullptr, "1 - erf(x)", "erfc(x)");

c.memsetZeroBytesError(nullptr);

c.memsetFloatError(nullptr, "varname");

c.memsetValueOutOfRangeError(nullptr, "varname");

c.missingReturnError(nullptr);

c.copyElisionError(nullptr);

c.useStandardLibraryError(nullptr, "memcpy");

// TODO: allocaCalled, <funcname>Called