StringUtil.h

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/*
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 The MIT License

 Copyright (c) 2013 Scientific Computing and Imaging Institute,
 University of Utah.


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 copy of this software and associated documentation files (the "Software"),
 to deal in the Software without restriction, including without limitation
 the rights to use, copy, modify, merge, publish, distribute, sublicense,
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 Software is furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included
 in all copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/// @todo Documentation Core/Utils/StringUtil.h

#ifndef CORE_UTILS_STRINGUTIL_H
#define CORE_UTILS_STRINGUTIL_H 1

#include <sstream>
#include <vector>
#include <iterator>
#include <boost/shared_ptr.hpp>
#include <boost/atomic.hpp>
#include <Core/Utils/share.h>

namespace SCIRun 
{
namespace Core
{
    
template <typename T>
std::vector<T*> toVectorOfRawPointers(const std::vector<boost::shared_ptr<T>>& vec)
{
  std::vector<T*> raws;
  raws.reserve(vec.size());
  std::transform(vec.begin(), vec.end(), std::back_inserter(raws), [](boost::shared_ptr<T> ptr) { return ptr.get(); });
  return raws;
}
  
template <typename T>
std::string to_string(const T& t)
{
  std::ostringstream o;
  o << t;
  return o.str();
}

template <typename T>
std::vector<T> parseLineOfNumbers(const std::string& line)
{
  std::istringstream stream(line);
  std::vector<T> numbers((std::istream_iterator<T>(stream)), (std::istream_iterator<T>()));
  
  return numbers;
}

template <class T, class Iter>
std::vector<boost::shared_ptr<T>> downcast_range(Iter begin, Iter end)
{
  std::vector<boost::shared_ptr<T>> output;
  std::transform(begin, end, std::back_inserter(output), [](const typename Iter::value_type& p) { return boost::dynamic_pointer_cast<T>(p); });
  return std::move(output);
}

template <class T, class Cont>
std::vector<boost::shared_ptr<T>> downcast_range(const Cont& container)
{
  return downcast_range<T>(container.begin(), container.end());
}

template <class T, class Iter>
std::vector<boost::shared_ptr<T>> upcast_range(Iter begin, Iter end)
{
  //BOOST_STATIC_ASSERT(boost::is_base_of<T, typename Iter::value_type>::value);
  std::vector<boost::shared_ptr<T>> output;
  std::transform(begin, end, std::back_inserter(output), [](const typename Iter::value_type& p) { return boost::static_pointer_cast<T>(p); });
  return std::move(output);
}

template <class T, class Cont> 
std::vector<boost::shared_ptr<T>> upcast_range(const Cont& container)
{
  return upcast_range<T>(container.begin(), container.end());
}

struct SCISHARE AtomicCounter
{
  int operator()() const;
private:
  static boost::atomic<int> counter_;
};

}}

namespace std
{
  template <class T>
  std::ostream& operator<<(std::ostream& o, const std::vector<T>& vec)
  {
    o << "[";
    std::copy(vec.begin(), vec.end(), std::ostream_iterator<T>(o, " "));
    o << "]";
    return o;
  }
}

#endif