Added boost header

test/external/boost/program_options/environment_iterator.hpp

@@ -0,0 +1,51 @@
+// Copyright Vladimir Prus 2004.
+// Distributed under the Boost Software License, Version 1.0.
+// (See accompanying file LICENSE_1_0.txt
+// or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_ENVIRONMENT_ITERATOR_VP_2004_05_14
+#define BOOST_ENVIRONMENT_ITERATOR_VP_2004_05_14
+
+#include "eof_iterator.hpp"
+
+#include <utility>
+#include <string>
+#include <cassert>
+
+namespace boost {
+
+    class environment_iterator 
+        : public eof_iterator<environment_iterator, 
+                              std::pair<std::string, std::string> >
+    {
+    public:
+        environment_iterator(char** environment)
+        : m_environment(environment)
+        {
+            get();
+        }
+        
+        environment_iterator()
+        {
+            found_eof();
+        }
+        
+        void get()
+        {
+            if (*m_environment == 0)
+                found_eof();
+            else {
+                std::string s(*m_environment);
+                std::string::size_type n = s.find('=');
+                assert(n != s.npos);
+                value().first = s.substr(0, n);
+                value().second = s.substr(n+1);
+            }            
+            ++m_environment;
+        }
+        
+    private:
+        char** m_environment;
+    };
+}
+#endif