1 files changed, 86 insertions, 0 deletions
diff --git a/botan/src/utils/stl_util.h b/botan/src/utils/stl_util.h
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+++ b/botan/src/utils/stl_util.h
@@ -0,0 +1,86 @@
+/*
+* 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 {
+
+/*
+* Copy-on-Predicate Algorithm
+*/
+template<typename InputIterator, typename OutputIterator, typename Predicate>
+OutputIterator copy_if(InputIterator current, InputIterator end,
+                       OutputIterator dest, Predicate copy_p)
+   {
+   while(current != end)
+      {
+      if(copy_p(*current))
+         *dest++ = *current;
+      ++current;
+      }
+   return dest;
+   }
+
+/*
+* Searching through a std::map
+*/
+template<typename K, typename V>
+inline V search_map(const std::map<K, V>& mapping,
+                    const K& key,
+                    const V& null_result = V())
+   {
+   typename std::map<K, V>::const_iterator 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)
+   {
+   typename std::map<K, V>::const_iterator i = mapping.find(key);
+   if(i == mapping.end())
+      return null_result;
+   return found_result;
+   }
+
+/*
+* Function adaptor for delete operation
+*/
+template<class T>
+class del_fun : public std::unary_function<T, void>
+   {
+   public:
+      void operator()(T* ptr) { delete ptr; }
+   };
+
+/*
+* Delete the second half of a pair of objects
+*/
+template<typename Pair>
+void delete2nd(Pair& pair)
+   {
+   delete pair.second;
+   }
+
+/*
+* 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)
+   {
+   multimap.insert(std::make_pair(key, value));
+   }
+
+}
+
+#endif