stc/exp/ml_stc_linux_make_v1.0/include/boost/program_options/environment_iterator.hpp

   1 // Copyright Vladimir Prus 2004.\r
   2 // Distributed under the Boost Software License, Version 1.0.\r
   3 // (See accompanying file LICENSE_1_0.txt\r
   4 // or copy at http://www.boost.org/LICENSE_1_0.txt)\r
   5 \r
   6 #ifndef BOOST_ENVIRONMENT_ITERATOR_VP_2004_05_14\r
   7 #define BOOST_ENVIRONMENT_ITERATOR_VP_2004_05_14\r
   8 \r
   9 #include "eof_iterator.hpp"\r
  10 \r
  11 #include <utility>\r
  12 #include <string>\r
  13 #include <cassert>\r
  14 \r
  15 namespace boost {\r
  16 \r
  17     class environment_iterator \r
  18         : public eof_iterator<environment_iterator, \r
  19                               std::pair<std::string, std::string> >\r
  20     {\r
  21     public:\r
  22         environment_iterator(char** environment)\r
  23         : m_environment(environment)\r
  24         {\r
  25             get();\r
  26         }\r
  27         \r
  28         environment_iterator()\r
  29         {\r
  30             found_eof();\r
  31         }\r
  32         \r
  33         void get()\r
  34         {\r
  35             if (*m_environment == 0)\r
  36                 found_eof();\r
  37             else {\r
  38                 std::string s(*m_environment);\r
  39                 std::string::size_type n = s.find('=');\r
  40                 assert(n != s.npos);\r
  41                 value().first = s.substr(0, n);\r
  42                 value().second = s.substr(n+1);\r
  43             }            \r
  44             ++m_environment;\r
  45         }\r
  46         \r
  47     private:\r
  48         char** m_environment;\r
  49     };\r
  50 }\r
  51 #endif\r