/*
* STL Utility Functions
* (C) 1999-2007 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/

#ifndef BOTAN_STL_UTIL_H__
#define BOTAN_STL_UTIL_H__

#include <map>

namespace Botan {

/*
* Searching through a std::map
* @param mapping the map to search
* @param key is what to look for
* @param null_result is the value to return if key is not in mapping
* @return mapping[key] or null_result
*/
template<typename K, typename V>
inline V search_map(const std::map<K, V>& mapping,
                    const K& key,
                    const V& null_result = V())
   {
   auto i = mapping.find(key);
   if(i == mapping.end())
      return null_result;
   return i->second;
   }

template<typename K, typename V, typename R>
inline R search_map(const std::map<K, V>& mapping, const K& key,
                    const R& null_result, const R& found_result)
   {
   auto i = mapping.find(key);
   if(i == mapping.end())
      return null_result;
   return found_result;
   }

/*
* Insert a key/value pair into a multimap
*/
template<typename K, typename V>
void multimap_insert(std::multimap<K, V>& multimap,
                     const K& key, const V& value)
   {
#if defined(BOTAN_BUILD_COMPILER_IS_SUN_STUDIO)
   // Work around a strange bug in Sun Studio
   multimap.insert(std::make_pair<const K, V>(key, value));
#else
   multimap.insert(std::make_pair(key, value));
#endif
   }

/**
* Existence check for values
*/
template<typename T>
bool value_exists(const std::vector<T>& vec,
                  const T& val)
   {
   for(size_t i = 0; i != vec.size(); ++i)
      if(vec[i] == val)
         return true;
   return false;
   }

}

#endif