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|
/*
* Cppcheck - A tool for static C/C++ code analysis
* Copyright (C) 2007-2025 Cppcheck team.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "vf_settokenvalue.h"
#include "astutils.h"
#include "calculate.h"
#include "config.h"
#include "library.h"
#include "mathlib.h"
#include "platform.h"
#include "settings.h"
#include "symboldatabase.h"
#include "token.h"
#include "utils.h"
#include "valueflow.h"
#include "vfvalue.h"
#include "vf_common.h"
#include <algorithm>
#include <climits>
#include <cstddef>
#include <functional>
#include <list>
#include <string>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
namespace ValueFlow
{
static Library::Container::Yield getContainerYield(Token* tok, const Settings& settings, Token*& parent)
{
if (Token::Match(tok, ". %name% (") && tok->astParent() == tok->tokAt(2) && tok->astOperand1() &&
tok->astOperand1()->valueType()) {
const Library::Container* c = getLibraryContainer(tok->astOperand1());
parent = tok->astParent();
return c ? c->getYield(tok->strAt(1)) : Library::Container::Yield::NO_YIELD;
}
if (Token::Match(tok->previous(), "%name% (")) {
parent = tok;
if (const Library::Function* f = settings.library.getFunction(tok->previous())) {
return f->containerYield;
}
}
return Library::Container::Yield::NO_YIELD;
}
static Value truncateImplicitConversion(Token* parent, const Value& value, const Settings& settings)
{
if (!value.isIntValue() && !value.isFloatValue())
return value;
if (!parent)
return value;
if (!parent->isBinaryOp())
return value;
if (!parent->isConstOp())
return value;
if (!astIsIntegral(parent->astOperand1(), false))
return value;
if (!astIsIntegral(parent->astOperand2(), false))
return value;
const ValueType* vt1 = parent->astOperand1()->valueType();
const ValueType* vt2 = parent->astOperand2()->valueType();
// If the sign is the same there is no truncation
if (vt1->sign == vt2->sign)
return value;
const size_t n1 = getSizeOf(*vt1, settings);
const size_t n2 = getSizeOf(*vt2, settings);
ValueType::Sign sign = ValueType::Sign::UNSIGNED;
if (n1 < n2)
sign = vt2->sign;
else if (n1 > n2)
sign = vt1->sign;
Value v = castValue(value, sign, std::max(n1, n2) * 8);
v.wideintvalue = value.intvalue;
return v;
}
static const Token *getCastTypeStartToken(const Token *parent, const Settings& settings)
{
// TODO: This might be a generic utility function?
if (!Token::Match(parent, "{|("))
return nullptr;
// Functional cast
if (parent->isBinaryOp() && Token::Match(parent->astOperand1(), "%type% (|{") &&
parent->astOperand1()->tokType() == Token::eType && astIsPrimitive(parent))
return parent->astOperand1();
if (parent->str() != "(")
return nullptr;
if (!parent->astOperand2() && Token::Match(parent, "( %name%|::")) {
const Token* ftok = parent->next();
if (ftok->isStandardType())
return ftok;
if (Token::simpleMatch(ftok, "::"))
ftok = ftok->next();
while (Token::Match(ftok, "%name% ::"))
ftok = ftok->tokAt(2);
if (settings.library.isNotLibraryFunction(ftok))
return parent->next();
}
if (parent->astOperand2() && Token::Match(parent->astOperand1(), "const_cast|dynamic_cast|reinterpret_cast|static_cast <"))
return parent->astOperand1()->tokAt(2);
return nullptr;
}
static bool isNumeric(const Value& value) {
return value.isIntValue() || value.isFloatValue();
}
static void setTokenValueCast(Token *parent, const ValueType &valueType, const Value &value, const Settings &settings)
{
if (valueType.pointer || value.isImpossible())
setTokenValue(parent,value,settings);
else if (valueType.type == ValueType::Type::CHAR)
setTokenValue(parent, castValue(value, valueType.sign, settings.platform.char_bit), settings);
else if (valueType.type == ValueType::Type::SHORT)
setTokenValue(parent, castValue(value, valueType.sign, settings.platform.short_bit), settings);
else if (valueType.type == ValueType::Type::INT)
setTokenValue(parent, castValue(value, valueType.sign, settings.platform.int_bit), settings);
else if (valueType.type == ValueType::Type::LONG)
setTokenValue(parent, castValue(value, valueType.sign, settings.platform.long_bit), settings);
else if (valueType.type == ValueType::Type::LONGLONG)
setTokenValue(parent, castValue(value, valueType.sign, settings.platform.long_long_bit), settings);
else if (valueType.isFloat() && isNumeric(value)) {
Value floatValue = value;
floatValue.valueType = Value::ValueType::FLOAT;
if (value.isIntValue())
floatValue.floatValue = static_cast<double>(value.intvalue);
setTokenValue(parent, std::move(floatValue), settings);
} else if (value.isIntValue()) {
const long long charMax = settings.platform.signedCharMax();
const long long charMin = settings.platform.signedCharMin();
if (charMin <= value.intvalue && value.intvalue <= charMax) {
// unknown type, but value is small so there should be no truncation etc
setTokenValue(parent,value,settings);
}
}
}
// does the operation cause a loss of information?
static bool isNonInvertibleOperation(const Token* tok)
{
return !Token::Match(tok, "+|-");
}
static bool isComputableValue(const Token* parent, const Value& value)
{
const bool noninvertible = isNonInvertibleOperation(parent);
if (noninvertible && value.isImpossible())
return false;
if (!value.isIntValue() && !value.isFloatValue() && !value.isTokValue() && !value.isIteratorValue())
return false;
if (value.isIteratorValue() && !Token::Match(parent, "+|-"))
return false;
if (value.isTokValue() && (!parent->isComparisonOp() || !Token::Match(value.tokvalue, "{|%str%")))
return false;
return true;
}
/** Set token value for cast */
static bool isCompatibleValueTypes(Value::ValueType x, Value::ValueType y)
{
static const std::unordered_map<Value::ValueType,
std::unordered_set<Value::ValueType, EnumClassHash>,
EnumClassHash>
compatibleTypes = {
{Value::ValueType::INT,
{Value::ValueType::FLOAT,
Value::ValueType::SYMBOLIC,
Value::ValueType::TOK}},
{Value::ValueType::FLOAT, {Value::ValueType::INT}},
{Value::ValueType::TOK, {Value::ValueType::INT}},
{Value::ValueType::ITERATOR_START, {Value::ValueType::INT}},
{Value::ValueType::ITERATOR_END, {Value::ValueType::INT}},
};
if (x == y)
return true;
auto it = compatibleTypes.find(x);
if (it == compatibleTypes.end())
return false;
return it->second.count(y) > 0;
}
static bool isCompatibleValues(const Value& value1, const Value& value2)
{
if (value1.isSymbolicValue() && value2.isSymbolicValue() && value1.tokvalue->exprId() != value2.tokvalue->exprId())
return false;
if (!isCompatibleValueTypes(value1.valueType, value2.valueType))
return false;
if (value1.isKnown() || value2.isKnown())
return true;
if (value1.isImpossible() || value2.isImpossible())
return false;
if (value1.varId == 0 || value2.varId == 0)
return true;
if (value1.varId == value2.varId && value1.varvalue == value2.varvalue && value1.isIntValue() && value2.isIntValue())
return true;
return false;
}
/** set ValueFlow value and perform calculations if possible */
void setTokenValue(Token* tok,
Value value,
const Settings& settings,
SourceLocation loc)
{
// Skip setting values that are too big since its ambiguous
if (!value.isImpossible() && value.isIntValue() && value.intvalue < 0 && astIsUnsigned(tok) &&
getSizeOf(*tok->valueType(), settings) >= sizeof(MathLib::bigint))
return;
if (!value.isImpossible() && value.isIntValue())
value = truncateImplicitConversion(tok->astParent(), value, settings);
if (settings.debugnormal)
setSourceLocation(value, loc, tok);
if (!tok->addValue(value))
return;
if (value.path < 0)
return;
Token *parent = tok->astParent();
if (!parent)
return;
if (Token::simpleMatch(parent, ",") && !parent->isInitComma() && astIsRHS(tok)) {
const Token* callParent = findParent(parent, [](const Token* p) {
return !Token::simpleMatch(p, ",");
});
// Ensure that the comma isn't a function call
if (!callParent || (!Token::Match(callParent->previous(), "%name%|> (") && !Token::simpleMatch(callParent, "{") &&
(!Token::Match(callParent, "( %name%") || settings.library.isNotLibraryFunction(callParent->next())) &&
!(callParent->str() == "(" && (Token::simpleMatch(callParent->astOperand1(), "*") || Token::Match(callParent->astOperand1(), "%name%|("))))) {
setTokenValue(parent, std::move(value), settings);
return;
}
}
if (Token::simpleMatch(parent, "=") && astIsRHS(tok)) {
setTokenValue(parent, value, settings);
if (!value.isUninitValue())
return;
}
if (value.isContainerSizeValue() && astIsContainer(tok)) {
// .empty, .size, +"abc", +'a'
if (Token::Match(parent, "+|==|!=") && parent->astOperand1() && parent->astOperand2()) {
for (const Value &value1 : parent->astOperand1()->values()) {
if (value1.isImpossible())
continue;
for (const Value &value2 : parent->astOperand2()->values()) {
if (value2.isImpossible())
continue;
if (value1.path != value2.path)
continue;
Value result;
if (Token::Match(parent, "%comp%"))
result.valueType = Value::ValueType::INT;
else
result.valueType = Value::ValueType::CONTAINER_SIZE;
if (value1.isContainerSizeValue() && value2.isContainerSizeValue())
result.intvalue = calculate(parent->str(), value1.intvalue, value2.intvalue);
else if (value1.isContainerSizeValue() && value2.isTokValue() && value2.tokvalue->tokType() == Token::eString)
result.intvalue = calculate(parent->str(), value1.intvalue, MathLib::bigint(Token::getStrLength(value2.tokvalue)));
else if (value2.isContainerSizeValue() && value1.isTokValue() && value1.tokvalue->tokType() == Token::eString)
result.intvalue = calculate(parent->str(), MathLib::bigint(Token::getStrLength(value1.tokvalue)), value2.intvalue);
else
continue;
combineValueProperties(value1, value2, result);
if (Token::simpleMatch(parent, "==") && result.intvalue)
continue;
if (Token::simpleMatch(parent, "!=") && !result.intvalue)
continue;
setTokenValue(parent, std::move(result), settings);
}
}
}
Token* next = nullptr;
const Library::Container::Yield yields = getContainerYield(parent, settings, next);
if (yields == Library::Container::Yield::SIZE) {
Value v(value);
v.valueType = Value::ValueType::INT;
setTokenValue(next, std::move(v), settings);
} else if (yields == Library::Container::Yield::EMPTY) {
Value v(value);
v.valueType = Value::ValueType::INT;
v.bound = Value::Bound::Point;
if (value.isImpossible()) {
if (value.intvalue == 0)
v.setKnown();
else if ((value.bound == Value::Bound::Upper && value.intvalue > 0) ||
(value.bound == Value::Bound::Lower && value.intvalue < 0)) {
v.intvalue = 0;
v.setKnown();
} else
v.setPossible();
} else {
v.intvalue = !v.intvalue;
}
setTokenValue(next, std::move(v), settings);
}
return;
}
if (value.isLifetimeValue()) {
if (!isLifetimeBorrowed(parent, settings))
return;
if (value.lifetimeKind == Value::LifetimeKind::Iterator && astIsIterator(parent)) {
setTokenValue(parent,std::move(value),settings);
} else if (astIsPointer(tok) && astIsPointer(parent) && !parent->isUnaryOp("*") &&
(parent->isArithmeticalOp() || parent->isCast())) {
setTokenValue(parent,std::move(value),settings);
}
return;
}
if (value.isUninitValue()) {
if (Token::Match(tok, ". %var%"))
setTokenValue(tok->next(), value, settings);
if (parent->isCast()) {
setTokenValue(parent, std::move(value), settings);
return;
}
Value pvalue = value;
if (!value.subexpressions.empty() && Token::Match(parent, ". %var%")) {
if (contains(value.subexpressions, parent->strAt(1)))
pvalue.subexpressions.clear();
else
return;
}
if (parent->isUnaryOp("&")) {
pvalue.indirect++;
setTokenValue(parent, std::move(pvalue), settings);
} else if (Token::Match(parent, ". %var%") && parent->astOperand1() == tok && parent->astOperand2()) {
if (parent->originalName() == "->" && pvalue.indirect > 0)
pvalue.indirect--;
setTokenValue(parent->astOperand2(), std::move(pvalue), settings);
} else if (Token::Match(parent->astParent(), ". %var%") && parent->astParent()->astOperand1() == parent) {
if (parent->astParent()->originalName() == "->" && pvalue.indirect > 0)
pvalue.indirect--;
setTokenValue(parent->astParent()->astOperand2(), std::move(pvalue), settings);
} else if (parent->isUnaryOp("*") && pvalue.indirect > 0) {
pvalue.indirect--;
setTokenValue(parent, std::move(pvalue), settings);
}
return;
}
// cast..
if (const Token *castType = getCastTypeStartToken(parent, settings)) {
if (contains({Value::ValueType::INT, Value::ValueType::SYMBOLIC}, value.valueType) &&
Token::simpleMatch(parent->astOperand1(), "dynamic_cast"))
return;
const ValueType &valueType = ValueType::parseDecl(castType, settings);
if (value.isImpossible() && value.isIntValue() && value.intvalue < 0 && astIsUnsigned(tok) &&
valueType.sign == ValueType::SIGNED && tok->valueType() &&
getSizeOf(*tok->valueType(), settings) >= getSizeOf(valueType, settings))
return;
setTokenValueCast(parent, valueType, value, settings);
}
else if (parent->str() == ":") {
setTokenValue(parent,std::move(value),settings);
}
else if (parent->str() == "?" && tok->str() == ":" && tok == parent->astOperand2() && parent->astOperand1()) {
// is condition always true/false?
if (parent->astOperand1()->hasKnownValue()) {
const Value &condvalue = parent->astOperand1()->values().front();
const bool cond(condvalue.isTokValue() || (condvalue.isIntValue() && condvalue.intvalue != 0));
if (cond && !tok->astOperand1()) { // true condition, no second operator
setTokenValue(parent, condvalue, settings);
} else {
const Token *op = cond ? tok->astOperand1() : tok->astOperand2();
if (!op) // #7769 segmentation fault at setTokenValue()
return;
const std::list<Value> &values = op->values();
if (std::find(values.cbegin(), values.cend(), value) != values.cend())
setTokenValue(parent, std::move(value), settings);
}
} else if (!value.isImpossible()) {
// is condition only depending on 1 variable?
// cppcheck-suppress[variableScope] #8541
nonneg int varId = 0;
bool ret = false;
visitAstNodes(parent->astOperand1(),
[&](const Token *t) {
if (t->varId()) {
if (varId > 0 || value.varId != 0)
ret = true;
varId = t->varId();
} else if (t->str() == "(" && Token::Match(t->previous(), "%name%"))
ret = true; // function call
return ret ? ChildrenToVisit::done : ChildrenToVisit::op1_and_op2;
});
if (ret)
return;
Value v(std::move(value));
v.conditional = true;
v.changeKnownToPossible();
setTokenValue(parent, std::move(v), settings);
}
}
else if (parent->str() == "?" && value.isIntValue() && tok == parent->astOperand1() && value.isKnown() &&
parent->astOperand2() && parent->astOperand2()->astOperand1() && parent->astOperand2()->astOperand2()) {
const std::list<Value> &values = (value.intvalue == 0
? parent->astOperand2()->astOperand2()->values()
: parent->astOperand2()->astOperand1()->values());
for (const Value &v : values)
setTokenValue(parent, v, settings);
}
// Offset of non null pointer is not null also
else if (astIsPointer(tok) && Token::Match(parent, "+|-") &&
(parent->astOperand2() == nullptr || !astIsPointer(parent->astOperand2())) &&
value.isIntValue() && value.isImpossible() && value.intvalue == 0) {
setTokenValue(parent, std::move(value), settings);
}
// Calculations..
else if ((parent->isArithmeticalOp() || parent->isComparisonOp() || (parent->tokType() == Token::eBitOp) ||
(parent->tokType() == Token::eLogicalOp)) &&
parent->astOperand1() && parent->astOperand2()) {
const bool noninvertible = isNonInvertibleOperation(parent);
// Skip operators with impossible values that are not invertible
if (noninvertible && value.isImpossible())
return;
// known result when a operand is 0.
if (Token::Match(parent, "[&*]") && astIsIntegral(parent, true) && value.isKnown() && value.isIntValue() &&
value.intvalue == 0) {
setTokenValue(parent, std::move(value), settings);
return;
}
// known result when a operand is true.
if (Token::simpleMatch(parent, "&&") && value.isKnown() && value.isIntValue() && value.intvalue==0) {
setTokenValue(parent, std::move(value), settings);
return;
}
// known result when a operand is false.
if (Token::simpleMatch(parent, "||") && value.isKnown() && value.isIntValue() && value.intvalue!=0) {
setTokenValue(parent, std::move(value), settings);
return;
}
for (const Value &value1 : parent->astOperand1()->values()) {
if (!isComputableValue(parent, value1))
continue;
for (const Value &value2 : parent->astOperand2()->values()) {
if (value1.path != value2.path && value1.path != 0 && value2.path != 0)
continue;
if (!isComputableValue(parent, value2))
continue;
if (value1.isIteratorValue() && value2.isIteratorValue())
continue;
if (!isCompatibleValues(value1, value2))
continue;
Value result(0);
combineValueProperties(value1, value2, result);
if (astIsFloat(parent, false)) {
if (!result.isIntValue() && !result.isFloatValue())
continue;
result.valueType = Value::ValueType::FLOAT;
}
const double floatValue1 = value1.isFloatValue() ? value1.floatValue : static_cast<double>(value1.intvalue);
const double floatValue2 = value2.isFloatValue() ? value2.floatValue : static_cast<double>(value2.intvalue);
const bool isFloat = value1.isFloatValue() || value2.isFloatValue();
const auto intValue1 = [&]() -> MathLib::bigint {
return value1.isFloatValue() ? static_cast<MathLib::bigint>(value1.floatValue) : value1.intvalue;
};
const auto intValue2 = [&]() -> MathLib::bigint {
return value2.isFloatValue() ? static_cast<MathLib::bigint>(value2.floatValue) : value2.intvalue;
};
if ((value1.isFloatValue() || value2.isFloatValue()) && Token::Match(parent, "&|^|%|<<|>>|==|!=|%or%"))
continue;
if (Token::Match(parent, "==|!=")) {
if ((value1.isIntValue() && value2.isTokValue()) || (value1.isTokValue() && value2.isIntValue())) {
if (parent->str() == "==")
result.intvalue = 0;
else if (parent->str() == "!=")
result.intvalue = 1;
} else if (value1.isIntValue() && value2.isIntValue()) {
bool error = false;
result.intvalue = calculate(parent->str(), intValue1(), intValue2(), &error);
if (error)
continue;
} else if (value1.isTokValue() && value2.isTokValue() &&
(astIsContainer(parent->astOperand1()) || astIsContainer(parent->astOperand2()))) {
const Token* tok1 = value1.tokvalue;
const Token* tok2 = value2.tokvalue;
bool equal = false;
if (Token::Match(tok1, "%str%") && Token::Match(tok2, "%str%")) {
equal = tok1->str() == tok2->str();
} else if (Token::simpleMatch(tok1, "{") && Token::simpleMatch(tok2, "{")) {
std::vector<const Token*> args1 = getArguments(tok1);
std::vector<const Token*> args2 = getArguments(tok2);
if (args1.size() == args2.size()) {
if (!std::all_of(args1.begin(), args1.end(), std::mem_fn(&Token::hasKnownIntValue)))
continue;
if (!std::all_of(args2.begin(), args2.end(), std::mem_fn(&Token::hasKnownIntValue)))
continue;
equal = std::equal(args1.begin(),
args1.end(),
args2.begin(),
[&](const Token* atok, const Token* btok) {
return atok->values().front().intvalue ==
btok->values().front().intvalue;
});
} else {
equal = false;
}
} else {
continue;
}
result.intvalue = parent->str() == "==" ? equal : !equal;
} else {
continue;
}
setTokenValue(parent, std::move(result), settings);
} else if (Token::Match(parent, "%op%")) {
if (Token::Match(parent, "%comp%")) {
if (!isFloat && !value1.isIntValue() && !value2.isIntValue())
continue;
} else {
if (value1.isTokValue() || value2.isTokValue())
break;
}
bool error = false;
if (isFloat) {
auto val = calculate(parent->str(), floatValue1, floatValue2, &error);
if (result.isFloatValue()) {
result.floatValue = val;
} else {
result.intvalue = static_cast<MathLib::bigint>(val);
}
} else {
auto val = calculate(parent->str(), intValue1(), intValue2(), &error);
if (result.isFloatValue()) {
result.floatValue = static_cast<double>(val);
} else {
result.intvalue = val;
}
}
if (error)
continue;
// If the bound comes from the second value then invert the bound when subtracting
if (Token::simpleMatch(parent, "-") && value2.bound == result.bound &&
value2.bound != Value::Bound::Point)
result.invertBound();
setTokenValue(parent, std::move(result), settings);
}
}
}
}
// !
else if (parent->str() == "!") {
for (const Value &val : tok->values()) {
if (!val.isIntValue())
continue;
if (val.isImpossible() && val.intvalue != 0)
continue;
Value v(val);
if (val.isImpossible())
v.setKnown();
else
v.intvalue = !v.intvalue;
setTokenValue(parent, std::move(v), settings);
}
}
// ~
else if (parent->str() == "~") {
for (const Value &val : tok->values()) {
if (!val.isIntValue())
continue;
Value v(val);
v.intvalue = ~v.intvalue;
std::uint8_t bits = 0;
if (tok->valueType() &&
tok->valueType()->sign == ValueType::Sign::UNSIGNED &&
tok->valueType()->pointer == 0) {
if (tok->valueType()->type == ValueType::Type::INT)
bits = settings.platform.int_bit;
else if (tok->valueType()->type == ValueType::Type::LONG)
bits = settings.platform.long_bit;
}
if (bits > 0 && bits < MathLib::bigint_bits)
v.intvalue &= (1ULL<<bits) - 1;
setTokenValue(parent, std::move(v), settings);
}
}
// unary minus
else if (parent->isUnaryOp("-")) {
for (const Value &val : tok->values()) {
if (!val.isIntValue() && !val.isFloatValue())
continue;
Value v(val);
if (v.isIntValue()) {
if (v.intvalue == LLONG_MIN)
// Value can't be inverted
continue;
v.intvalue = -v.intvalue;
} else
v.floatValue = -v.floatValue;
v.invertBound();
setTokenValue(parent, std::move(v), settings);
}
}
// increment
else if (parent->str() == "++") {
for (const Value &val : tok->values()) {
if (!val.isIntValue() && !val.isFloatValue() && !val.isSymbolicValue())
continue;
Value v(val);
if (parent == tok->previous()) {
if (v.isIntValue() || v.isSymbolicValue()) {
const ValueType *dst = tok->valueType();
if (dst) {
const size_t sz = ValueFlow::getSizeOf(*dst, settings);
MathLib::bigint newvalue = ValueFlow::truncateIntValue(v.intvalue + 1, sz, dst->sign);
if (v.bound != ValueFlow::Value::Bound::Point) {
if (newvalue < v.intvalue) {
v.invertBound();
newvalue -= 2;
}
}
v.intvalue = newvalue;
} else {
v.intvalue = v.intvalue + 1;
}
}
else
v.floatValue = v.floatValue + 1.0;
}
setTokenValue(parent, std::move(v), settings);
}
}
// decrement
else if (parent->str() == "--") {
for (const Value &val : tok->values()) {
if (!val.isIntValue() && !val.isFloatValue() && !val.isSymbolicValue())
continue;
Value v(val);
if (parent == tok->previous()) {
if (v.isIntValue() || v.isSymbolicValue()) {
const ValueType *dst = tok->valueType();
if (dst) {
const size_t sz = ValueFlow::getSizeOf(*dst, settings);
MathLib::bigint newvalue = ValueFlow::truncateIntValue(v.intvalue - 1, sz, dst->sign);
if (v.bound != ValueFlow::Value::Bound::Point) {
if (newvalue > v.intvalue) {
v.invertBound();
newvalue += 2;
}
}
v.intvalue = newvalue;
} else {
v.intvalue = v.intvalue - 1;
}
}
else
v.floatValue = v.floatValue - 1.0;
}
setTokenValue(parent, std::move(v), settings);
}
}
// C++ init
else if (parent->str() == "{" && Token::simpleMatch(parent->previous(), "= {") &&
Token::simpleMatch(parent->link(), "} ;")) {
const Token* lhs = parent->previous()->astOperand1();
if (lhs && lhs->valueType()) {
if (lhs->valueType()->isIntegral() || lhs->valueType()->isFloat() || (lhs->valueType()->pointer > 0 && value.isIntValue())) {
setTokenValue(parent, std::move(value), settings);
}
}
}
else if (Token::Match(parent, ":: %name%") && parent->astOperand2() == tok) {
setTokenValue(parent, std::move(value), settings);
}
// Calling std::size or std::empty on an array
else if (value.isTokValue() && Token::simpleMatch(value.tokvalue, "{") && tok->variable() &&
tok->variable()->isArray() && Token::Match(parent->previous(), "%name% (") && astIsRHS(tok)) {
std::vector<const Token*> args = getArguments(value.tokvalue);
if (const Library::Function* f = settings.library.getFunction(parent->previous())) {
if (f->containerYield == Library::Container::Yield::SIZE) {
Value v(std::move(value));
v.valueType = Value::ValueType::INT;
v.intvalue = args.size();
setTokenValue(parent, std::move(v), settings);
} else if (f->containerYield == Library::Container::Yield::EMPTY) {
Value v(std::move(value));
v.intvalue = args.empty();
v.valueType = Value::ValueType::INT;
setTokenValue(parent, std::move(v), settings);
}
}
}
}
}
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