113 lines
3.6 KiB
C++
113 lines
3.6 KiB
C++
/*
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* Cppcheck - A tool for static C/C++ code analysis
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* Copyright (C) 2007-2022 Cppcheck team.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef GUARD_PROGRAMMEMORY_H
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#define GUARD_PROGRAMMEMORY_H
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#include "mathlib.h"
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#include "utils.h"
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#include "valueflow.h" // needed for alias
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#include <map>
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#include <unordered_map>
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class Token;
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class Settings;
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struct ProgramMemory {
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using Map = std::unordered_map<nonneg int, ValueFlow::Value>;
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Map values;
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void setValue(nonneg int exprid, const ValueFlow::Value& value);
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const ValueFlow::Value* getValue(nonneg int exprid, bool impossible = false) const;
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bool getIntValue(nonneg int exprid, MathLib::bigint* result) const;
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void setIntValue(nonneg int exprid, MathLib::bigint value, bool impossible = false);
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bool getContainerSizeValue(nonneg int exprid, MathLib::bigint* result) const;
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bool getContainerEmptyValue(nonneg int exprid, MathLib::bigint* result) const;
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void setContainerSizeValue(nonneg int exprid, MathLib::bigint value, bool isEqual = true);
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void setUnknown(nonneg int exprid);
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bool getTokValue(nonneg int exprid, const Token** result) const;
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bool hasValue(nonneg int exprid);
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void swap(ProgramMemory &pm);
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void clear();
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bool empty() const;
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void replace(const ProgramMemory &pm);
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void insert(const ProgramMemory &pm);
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};
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void programMemoryParseCondition(ProgramMemory& pm, const Token* tok, const Token* endTok, const Settings* settings, bool then);
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struct ProgramMemoryState {
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ProgramMemory state;
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std::map<nonneg int, const Token*> origins;
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const Settings* settings;
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explicit ProgramMemoryState(const Settings* s);
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void insert(const ProgramMemory &pm, const Token* origin = nullptr);
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void replace(const ProgramMemory &pm, const Token* origin = nullptr);
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void addState(const Token* tok, const ProgramMemory::Map& vars);
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void assume(const Token* tok, bool b, bool isEmpty = false);
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void removeModifiedVars(const Token* tok);
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ProgramMemory get(const Token* tok, const Token* ctx, const ProgramMemory::Map& vars) const;
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};
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void execute(const Token* expr,
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ProgramMemory* const programMemory,
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MathLib::bigint* result,
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bool* error,
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const Settings* settings = nullptr);
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/**
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* Is condition always false when variable has given value?
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* \param condition top ast token in condition
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* \param programMemory program memory
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*/
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bool conditionIsFalse(const Token* condition, ProgramMemory pm, const Settings* settings = nullptr);
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/**
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* Is condition always true when variable has given value?
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* \param condition top ast token in condition
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* \param programMemory program memory
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*/
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bool conditionIsTrue(const Token* condition, ProgramMemory pm, const Settings* settings = nullptr);
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/**
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* Get program memory by looking backwards from given token.
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*/
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ProgramMemory getProgramMemory(const Token* tok, nonneg int exprid, const ValueFlow::Value& value, const Settings *settings);
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ProgramMemory getProgramMemory(const Token *tok, const ProgramMemory::Map& vars);
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#endif
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