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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 checktypeH
#define checktypeH
//---------------------------------------------------------------------------
#include "check.h"
#include "config.h"
#include <list>
#include <string>
class ErrorLogger;
class Settings;
class Token;
class ValueType;
class Tokenizer;
namespace ValueFlow
{
class Value;
}
/// @addtogroup Checks
/// @{
/** @brief Various small checks */
class CPPCHECKLIB CheckType : public Check {
public:
/** @brief This constructor is used when registering the CheckClass */
CheckType() : Check(myName()) {}
private:
/** @brief This constructor is used when running checks. */
CheckType(const Tokenizer *tokenizer, const Settings *settings, ErrorLogger *errorLogger)
: Check(myName(), tokenizer, settings, errorLogger) {}
/** @brief Run checks against the normal token list */
void runChecks(const Tokenizer &tokenizer, ErrorLogger *errorLogger) override;
/** @brief %Check for bitwise shift with too big right operand */
void checkTooBigBitwiseShift();
/** @brief %Check for integer overflow */
void checkIntegerOverflow();
/** @brief %Check for dangerous sign conversion */
void checkSignConversion();
/** @brief %Check for implicit long cast of int result */
void checkLongCast();
/** @brief %Check for float to integer overflow */
void checkFloatToIntegerOverflow();
void checkFloatToIntegerOverflow(const Token *tok, const ValueType *vtint, const ValueType *vtfloat, const std::list<ValueFlow::Value> &floatValues);
// Error messages..
void tooBigBitwiseShiftError(const Token *tok, int lhsbits, const ValueFlow::Value &rhsbits);
void tooBigSignedBitwiseShiftError(const Token *tok, int lhsbits, const ValueFlow::Value &rhsbits);
void integerOverflowError(const Token *tok, const ValueFlow::Value &value, bool isOverflow = true);
void signConversionError(const Token *tok, const ValueFlow::Value *negativeValue, bool constvalue);
void longCastAssignError(const Token *tok, const ValueType* src = nullptr, const ValueType* tgt = nullptr);
void longCastReturnError(const Token *tok, const ValueType* src = nullptr, const ValueType* tgt = nullptr);
void floatToIntegerOverflowError(const Token *tok, const ValueFlow::Value &value);
void getErrorMessages(ErrorLogger *errorLogger, const Settings *settings) const override;
static std::string myName() {
return "Type";
}
std::string classInfo() const override {
return "Type checks\n"
"- bitwise shift by too many bits (only enabled when --platform is used)\n"
"- signed integer overflow (only enabled when --platform is used)\n"
"- dangerous sign conversion, when signed value can be negative\n"
"- possible loss of information when assigning int result to long variable\n"
"- possible loss of information when returning int result as long return value\n"
"- float conversion overflow\n";
}
};
/// @}
//---------------------------------------------------------------------------
#endif // checktypeH
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