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// This is essentially copied from Qt 5's
// qtbase/src/corelib/plugin/qelfparser_p.{h,cpp}

#ifndef UTILS_ELFREADER_H
#define UTILS_ELFREADER_H

#include "utils_global.h"

#include <qendian.h>
#include <qlist.h>
#include <qstring.h>

namespace Utils {

enum DebugSymbolsType
{
    UnknownSymbols,    // Unknown.
    NoSymbols,         // No usable symbols.
    SeparateSymbols,   // Symbols mentioned, but not in binary.
    PlainSymbols,      // Ordinary symbols available.
    FastSymbols        // Dwarf index available.
};

class QTCREATOR_UTILS_EXPORT ElfHeader
{
public:
    QByteArray name;
    quint32 index;
    quint32 type;
    quint64 offset;
    quint64 size;
    quint64 data;
};

class QTCREATOR_UTILS_EXPORT ElfHeaders
{
public:
    ElfHeaders() : symbolsType(UnknownSymbols) {}
    int indexOf(const QByteArray &name) const;

public:
    DebugSymbolsType symbolsType;
    QList<ElfHeader> headers;
};

class QTCREATOR_UTILS_EXPORT ElfReader
{
public:
    explicit ElfReader(const QString &binary);
    enum Result { Ok, NotElf, Corrupt };

    enum ElfEndian { ElfLittleEndian = 0, ElfBigEndian = 1 };
    ElfHeaders readHeaders();
    QByteArray readSection(const QByteArray &sectionName);
    QString errorString() const { return m_errorString; }

private:
    friend class ElfMapper;
    Result readIt();

    QString m_binary;
    QString m_errorString;
    ElfEndian m_endian;
    ElfHeaders m_headers;
};

} // namespace Utils

#endif // UTILS_ELFREADER_H