TPIntegerVector_p2.h

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/*
  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
*/
 
#ifndef TPINTEGERVECTOR_P2_H
#define TPINTEGERVECTOR_P2_H
 
#include <vector>
 
 
class TPIntegerVectorStorage_p2;
 
class TPIntegerVector_p2
{  
public:
  typedef unsigned int  value_type;
  typedef value_type*   iterator;
  typedef const value_type* const_iterator;
 
  typedef TPIntegerVector_p2    IsAnIntVect;
  
  TPIntegerVector_p2(TPIntegerVectorStorage_p2 *storage, int idx)
    : m_storage( storage ),
      m_position( idx<<1 )
  {}
 
  // --- size-related
  unsigned  size() const;
  unsigned  reserved() const;
  void      resize( size_t  new_size );
  void      reserve( size_t  new_size );
  void      grow( const size_t diff = 1 );
  
  // --- basic INT access
  value_type& operator[]( size_t idx );
  const value_type& operator[]( size_t idx ) const;
 
  // --- storing
  void      push_back( const value_type& val );
  void      push_int( const int& val );
  // void       push_back_short( const short& val );   // hmmm  
  void      push_float( const float& val );
  void      push_double( const double& val );
  // void       push_long( const long long& val );
 
  void      push_chars( const char * const );
  void      push_string( const std::string& );
  void      push_bytes( const void * s, size_t len );
  
  void      push_TPObjRef( const TPObjRef& val );
  void      push_vTPObjRef( const std::vector<TPObjRef>& val );
 
  template<typename T>
  static size_t size_for( const T& );
 
  static size_t size_for( const char * );
  static size_t size_for_ref();
  static size_t size_for_blob( size_t blobsize );
 
  size_t    next_string_size( const const_iterator& iter ) const;
  size_t    next_blob_size( const const_iterator& iter ) const;
     
  // --- retrieving
  // all NEXT methods advance the iterator to the next element
  const value_type&  next( const_iterator& iter ) const;
  int       next_int( const_iterator& iter ) const;
  float     next_float( const_iterator& iter ) const;
  double    next_double( const_iterator& iter ) const;
  TPObjRef  next_TPObjRef( const_iterator& iter ) const;
 
  // compatible with push_chars()
  std::string   next_string( const_iterator& iter ) const;
  void      next_chars( const_iterator& iter, char *buff, size_t bufflen ) const;
  void      next_bytes( const_iterator& iter, void *buff, size_t bufflen ) const;
  void      next_vTPObjRef( const_iterator& iter, std::vector<TPObjRef> & vect ) const; 
  
  // --- iterators
  iterator begin() { return &operator[](0); }
  iterator end()   { return &operator[](size()); };
 
  const_iterator begin() const { return &operator[](0); }
  const_iterator end()   const { return &operator[](size()); };
  
protected:
  unsigned  startPos() const;
  bool      lastElement() const;
 
  void      _store_bytes( const void *, size_t len );
 
  TPIntegerVectorStorage_p2 *m_storage;
  unsigned int          m_position;
};
     
 
 
 
 
// This class needs to be in the same header file, otherwise the methods of
// TPIntegerVector_p2 can not be inlined
 
 
class TPIntegerVectorStorage_p2
{
public:
friend class  TPIntegerVector_p2;
  
  TPIntegerVectorStorage_p2() {}
 
  typedef unsigned  position_type;
  typedef TPIntegerVector_p2::value_type    value_type;
 
  size_t size() const {
     return m_endPos.size() >> 1;
  }
 
  void grow() {
     position_type  pos = size()? m_endPos.back() : 0;
     m_endPos.push_back( pos );
     m_endPos.push_back( pos );
  }
  
  TPIntegerVector_p2  operator[](int idx) {
     return TPIntegerVector_p2( this, idx );
  }
  
  TPIntegerVector_p2  back() {
     return TPIntegerVector_p2( this, size()-1 );
  }
 
  void reserve( size_t s ) {
     m_endPos.reserve( s<<1 );
  }
  
protected:
  std::vector<value_type>   m_data;
  std::vector<position_type>    m_endPos;
};
 
 
#include "AthenaPoolUtilities/TPIntegerVector_p2.icc"
     
 
#endif