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/* -*- C++ -*-
* 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/>.
*/
//---------------------------------------------------------------------------
#ifndef valueflowH
#define valueflowH
//---------------------------------------------------------------------------
#include "config.h"
#include "errortypes.h"
#include "mathlib.h"
#include <cstdint>
#include <cstdlib>
#include <functional>
#include <list>
#include <string>
#include <utility>
#include <vector>
class ErrorLogger;
class Settings;
class SymbolDatabase;
class TimerResultsIntf;
class Token;
class TokenList;
class ValueType;
class Variable;
class Scope;
namespace ValueFlow
{
class Value;
}
namespace ValueFlow {
/// Constant folding of expression. This can be used before the full ValueFlow has been executed (ValueFlow::setValues).
const Value * valueFlowConstantFoldAST(Token *expr, const Settings &settings);
/// Perform valueflow analysis.
void setValues(TokenList& tokenlist,
SymbolDatabase& symboldatabase,
ErrorLogger& errorLogger,
const Settings& settings,
TimerResultsIntf* timerResults);
std::string eitherTheConditionIsRedundant(const Token *condition);
enum class Accuracy : std::uint8_t {
ExactOrZero,
LowerBound,
};
size_t getSizeOf(const ValueType &vt,
const Settings &settings,
Accuracy accuracy,
int maxRecursion = 0);
const Value* findValue(const std::list<Value>& values,
const Settings& settings,
const std::function<bool(const Value&)> &pred);
std::vector<Value> isOutOfBounds(const Value& size, const Token* indexTok, bool possible = true);
Value asImpossible(Value v);
bool isContainerSizeChanged(const Token* tok, int indirect, const Settings& settings, int depth = 20);
struct LifetimeToken {
const Token* token{};
ErrorPath errorPath;
bool addressOf{};
bool inconclusive{};
LifetimeToken() = default;
LifetimeToken(const Token* token, ErrorPath errorPath)
: token(token), errorPath(std::move(errorPath))
{}
LifetimeToken(const Token* token, bool addressOf, ErrorPath errorPath)
: token(token), errorPath(std::move(errorPath)), addressOf(addressOf)
{}
static std::vector<LifetimeToken> setAddressOf(std::vector<LifetimeToken> v, bool b) {
for (LifetimeToken& x : v)
x.addressOf = b;
return v;
}
static std::vector<LifetimeToken> setInconclusive(std::vector<LifetimeToken> v, bool b) {
for (LifetimeToken& x : v)
x.inconclusive = b;
return v;
}
};
const Token *parseCompareInt(const Token *tok, Value &true_value, Value &false_value, const std::function<std::vector<MathLib::bigint>(const Token*)>& evaluate);
const Token *parseCompareInt(const Token *tok, Value &true_value, Value &false_value);
const Token* solveExprValue(const Token* expr,
const std::function<std::vector<MathLib::bigint>(const Token*)>& eval,
Value& value);
std::vector<LifetimeToken> getLifetimeTokens(const Token* tok,
const Settings& settings,
bool escape = false,
ErrorPath errorPath = ErrorPath{});
bool hasLifetimeToken(const Token* tok, const Token* lifetime, const Settings& settings);
const Variable* getLifetimeVariable(const Token* tok, ErrorPath& errorPath, const Settings& settings, bool* addressOf = nullptr);
const Variable* getLifetimeVariable(const Token* tok, const Settings& settings);
bool isLifetimeBorrowed(const Token *tok, const Settings &settings);
std::string lifetimeMessage(const Token *tok, const Value *val, ErrorPath &errorPath);
CPPCHECKLIB Value getLifetimeObjValue(const Token *tok, bool inconclusive = false);
CPPCHECKLIB std::vector<Value> getLifetimeObjValues(const Token* tok,
bool inconclusive = false,
MathLib::bigint path = 0);
const Token* getEndOfExprScope(const Token* tok, const Scope* defaultScope = nullptr, bool smallest = true);
void combineValueProperties(const Value& value1, const Value& value2, Value& result);
}
#endif // valueflowH
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