File: container.h

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/*
 * This file is part of din.
 *
 * din is copyright (c) 2006 - 2012 S Jagannathan <jag@dinisnoise.org>
 * For more information, please visit http://dinisnoise.org
 *
 * din is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 2 of the License, or
 * (at your option) any later version.
 *
 * din 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 General Public License
 * for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with din.  If not, see <http://www.gnu.org/licenses/>.
 *
*/
#ifndef __container
#define __container

template<class S, class T> inline void clear (S& container) {

  // clears container of pointers. deletes the pointers.
  typedef typename S::iterator Si;
  for (Si i = container.begin(), j = container.end(); i != j; ++i) {
    T* t = *i;
    delete t;
  }
  container.clear ();
}

template<class T> inline void erase (T& container, unsigned int q) {

  // erases qth item in container

  typedef typename T::iterator Ti;

  Ti iter = container.begin();
    for (unsigned int p = 0; p < q; ++p, ++iter);
  if (iter != container.end()) container.erase (iter);

}

template<class S, class T> inline T& get (S& container, unsigned int q) {

  // gets qth item in container

   typedef typename S::iterator Si;

  Si iter = container.begin ();
    for (unsigned int p = 0; p < q; ++p, ++iter);
  return *iter;

}

template<class S, class T, class I> inline T& get (S& container, I& iter, unsigned int q) {

  // gets qth item of container and its iterator
  iter = container.begin ();
  for (unsigned int p = 0; p < q; p++, ++iter);
  return *iter;

}

#endif