| 1 | // Copyright Vladimir Prus 2004. |
|---|---|
| 2 | // Distributed under the Boost Software License, Version 1.0. |
| 3 | // (See accompanying file LICENSE_1_0.txt |
| 4 | // or copy at http://www.boost.org/LICENSE_1_0.txt) |
| 5 | |
| 6 | #ifndef BOOST_ENVIRONMENT_ITERATOR_VP_2004_05_14 |
| 7 | #define BOOST_ENVIRONMENT_ITERATOR_VP_2004_05_14 |
| 8 | |
| 9 | #include "eof_iterator.hpp" |
| 10 | |
| 11 | #include <utility> |
| 12 | #include <string> |
| 13 | #include <cassert> |
| 14 | |
| 15 | namespace boost { |
| 16 | |
| 17 | class environment_iterator |
| 18 | : public eof_iterator<environment_iterator, |
| 19 | std::pair<std::string, std::string> > |
| 20 | { |
| 21 | public: |
| 22 | environment_iterator(char** environment) |
| 23 | : m_environment(environment) |
| 24 | { |
| 25 | get(); |
| 26 | } |
| 27 | |
| 28 | environment_iterator() |
| 29 | { |
| 30 | found_eof(); |
| 31 | } |
| 32 | |
| 33 | void get() |
| 34 | { |
| 35 | if (*m_environment == 0) |
| 36 | found_eof(); |
| 37 | else { |
| 38 | std::string s(*m_environment); |
| 39 | std::string::size_type n = s.find(c: '='); |
| 40 | assert(n != s.npos); |
| 41 | value().first = s.substr(pos: 0, n: n); |
| 42 | value().second = s.substr(pos: n+1); |
| 43 | |
| 44 | ++m_environment; |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | private: |
| 49 | char** m_environment; |
| 50 | }; |
| 51 | } |
| 52 | #endif |
| 53 |