cppcheck/lib/programmemory.h

99 lines
3.0 KiB
C++

#ifndef GUARD_PROGRAMMEMORY_H
#define GUARD_PROGRAMMEMORY_H
#include "mathlib.h"
#include "settings.h"
#include "utils.h"
#include "valueflow.h" // needed for alias
#include <functional>
#include <map>
#include <unordered_map>
class Token;
struct ProgramMemory {
using Map = std::unordered_map<nonneg int, ValueFlow::Value>;
Map values;
void setValue(nonneg int exprid, const ValueFlow::Value& value);
const ValueFlow::Value* getValue(nonneg int exprid, bool impossible = false) const;
bool getIntValue(nonneg int exprid, MathLib::bigint* result) const;
void setIntValue(nonneg int exprid, MathLib::bigint value);
bool getContainerSizeValue(nonneg int exprid, MathLib::bigint* result) const;
bool getContainerEmptyValue(nonneg int exprid, MathLib::bigint* result) const;
void setContainerSizeValue(nonneg int exprid, MathLib::bigint value, bool isEqual = true);
void setUnknown(nonneg int exprid);
bool getTokValue(nonneg int exprid, const Token** result) const;
bool hasValue(nonneg int exprid);
void swap(ProgramMemory &pm);
void clear();
bool empty() const;
void replace(const ProgramMemory &pm);
void insert(const ProgramMemory &pm);
};
void programMemoryParseCondition(ProgramMemory& pm, const Token* tok, const Token* endTok, const Settings* settings, bool then);
struct ProgramMemoryState {
ProgramMemory state;
std::map<nonneg int, const Token*> origins;
const Settings* settings;
explicit ProgramMemoryState(const Settings* s);
void insert(const ProgramMemory &pm, const Token* origin = nullptr);
void replace(const ProgramMemory &pm, const Token* origin = nullptr);
void addState(const Token* tok, const ProgramMemory::Map& vars);
void assume(const Token* tok, bool b, bool isEmpty = false);
void removeModifiedVars(const Token* tok);
ProgramMemory get(const Token* tok, const Token* ctx, const ProgramMemory::Map& vars) const;
};
using PMEvaluateFunction =
std::function<bool (const Token* expr, ProgramMemory* const programMemory, MathLib::bigint* result)>;
void execute(const Token* expr,
ProgramMemory* const programMemory,
MathLib::bigint* result,
bool* error,
const PMEvaluateFunction& f = nullptr);
/**
* Is condition always false when variable has given value?
* \param condition top ast token in condition
* \param programMemory program memory
*/
bool conditionIsFalse(const Token *condition, const ProgramMemory &programMemory);
/**
* Is condition always true when variable has given value?
* \param condition top ast token in condition
* \param programMemory program memory
*/
bool conditionIsTrue(const Token *condition, const ProgramMemory &programMemory);
/**
* Get program memory by looking backwards from given token.
*/
ProgramMemory getProgramMemory(const Token* tok, nonneg int exprid, const ValueFlow::Value& value);
ProgramMemory getProgramMemory(const Token *tok, const ProgramMemory::Map& vars);
#endif