File indexing completed on 2024-05-12 05:43:27

 /*
     Copyright (C) 2015 Volker Krause <vkrause@kde.org>
 
     This program is free software; you can redistribute it and/or modify it
     under the terms of the GNU Library General Public License as published by
     the Free Software Foundation; either version 2 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 Library 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 <https://www.gnu.org/licenses/>.
 */
 
 #ifndef DWARFEXPRESSION_H
 #define DWARFEXPRESSION_H
 
 #include <QByteArray>
 #include <QMetaType>
 #include <QStack>
 
 #include <libdwarf.h>
 
 class QString;
 
 /** Handles DW_FORM_exprloc attribute values. */
 class DwarfExpression
 {
 public:
     DwarfExpression();
     DwarfExpression(const DwarfExpression&) = default;
     explicit DwarfExpression(Dwarf_Ptr block, Dwarf_Unsigned len, uint8_t addrSize);
     ~DwarfExpression() = default;
 
     DwarfExpression& operator=(const DwarfExpression&) = default;
 
     QString displayString() const;
 
     /** Push a value to the evaluation stack.
      *  Depending on the type of the expression, this might be needed before evaluation.
      */
     void push(uint64_t value);
     /** Returns the top-most value of the evaluation stack.
      *  This is typically used to retrieve the result of an evaluation.
      */
     uint64_t top() const;
     uint64_t pop();
 
     /** Evaluate a simple expression, ie. one that results in one result value.
      *  @return @c true on success, @c false otherwise, the stack contains invalid data in that case.
      */
     bool evaluateSimple();
 
 private:
     template <typename T> T readNumber(int index) const;
     int evaluateOne(int index);
 
     QByteArray m_block;
     uint8_t m_addrSize;
     QStack<uint64_t> m_stack;
 };
 
 Q_DECLARE_METATYPE(DwarfExpression)
 
 #endif // DWARFEXPRESSION_H