//===- ObjectReader.h -----------------------------------------------------===//
//
//                     The MCLinker Project
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef MCLD_LD_OBJECTREADER_H_
#define MCLD_LD_OBJECTREADER_H_
#include "mcld/ADT/HashTable.h"
#include "mcld/ADT/StringHash.h"
#include "mcld/LD/LDReader.h"
#include "mcld/LD/ResolveInfo.h"

namespace mcld {

class Input;
class Module;

/** \class ObjectReader
 *  \brief ObjectReader provides an common interface for different object
 *  formats.
 */
class ObjectReader : public LDReader {
 protected:
  typedef HashTable<ResolveInfo, hash::StringHash<hash::DJB> >
      GroupSignatureMap;

 protected:
  ObjectReader() {}

 public:
  virtual ~ObjectReader() { f_GroupSignatureMap.clear(); }

  virtual bool readHeader(Input& pFile) = 0;

  virtual bool readSymbols(Input& pFile) = 0;

  virtual bool readSections(Input& pFile) = 0;

  /// readRelocations - read relocation sections
  ///
  /// This function should be called after symbol resolution.
  virtual bool readRelocations(Input& pFile) = 0;

  GroupSignatureMap& signatures() { return f_GroupSignatureMap; }

  const GroupSignatureMap& signatures() const { return f_GroupSignatureMap; }

 protected:
  GroupSignatureMap f_GroupSignatureMap;
};

}  // namespace mcld

#endif  // MCLD_LD_OBJECTREADER_H_