Chris@16:  /*=============================================================================
Chris@16:     Boost.Wave: A Standard compliant C++ preprocessor library
Chris@16: 
Chris@16:     http://www.boost.org/
Chris@16: 
Chris@16:     Copyright (c) 2001-2012 Hartmut Kaiser. Distributed under the Boost
Chris@16:     Software License, Version 1.0. (See accompanying file
Chris@16:     LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
Chris@16: =============================================================================*/
Chris@16: 
Chris@16: #if !defined(TIME_CONVERSION_HELPER_HPP_DA97E389_1797_43BA_82AE_B071064B3EF4_INCLUDED)
Chris@16: #define TIME_CONVERSION_HELPER_HPP_DA97E389_1797_43BA_82AE_B071064B3EF4_INCLUDED
Chris@16: 
Chris@16: #include <ctime>
Chris@16: #include <cstring>
Chris@16: 
Chris@16: #include <boost/config.hpp>
Chris@16: #include <boost/spirit/include/classic_core.hpp>
Chris@16: #include <boost/spirit/include/classic_symbols.hpp>
Chris@16: #include <boost/spirit/include/classic_assign_actor.hpp>
Chris@16: #include <boost/spirit/include/classic_push_back_actor.hpp>
Chris@16: 
Chris@16: #if !defined(spirit_append_actor)
Chris@16: #define spirit_append_actor(actor) boost::spirit::classic::push_back_a(actor)
Chris@16: #define spirit_assign_actor(actor) boost::spirit::classic::assign_a(actor)
Chris@16: #endif // !defined(spirit_append_actor)
Chris@16: 
Chris@16: // this must occur after all of the includes and before any code appears
Chris@16: #ifdef BOOST_HAS_ABI_HEADERS
Chris@16: #include BOOST_ABI_PREFIX
Chris@16: #endif
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: namespace boost {
Chris@16: namespace wave {
Chris@16: namespace util {
Chris@16: 
Chris@16: namespace time_conversion {
Chris@16: 
Chris@16:     using namespace std;    // some systems have std::tm etc. in namespace std
Chris@16:     
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: //  define, whether the rule's should generate some debug output
Chris@16: #define TRACE_CPP_TIME_CONVERSION \
Chris@16:     (BOOST_SPIRIT_DEBUG_FLAGS_CPP & BOOST_SPIRIT_DEBUG_FLAGS_TIME_CONVERSION) \
Chris@16:     /**/
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: //  Grammar for parsing a date/time string generated by the C++ compiler from
Chris@16: //  __DATE__ and __TIME__ 
Chris@16:     class time_conversion_grammar :
Chris@16:         public boost::spirit::classic::grammar<time_conversion_grammar>
Chris@16:     {
Chris@16:     public:
Chris@16:         time_conversion_grammar() : fYearIsCorrected(false)
Chris@16:         {
Chris@16:             using namespace std;        // some systems have memset in std
Chris@16:             memset (&time_stamp, 0, sizeof(tm));
Chris@16:             BOOST_SPIRIT_DEBUG_TRACE_RULE_NAME(*this, "time_conversion_grammar",
Chris@16:                 TRACE_CPP_TIME_CONVERSION);
Chris@16:         }
Chris@16:         
Chris@16:         template <typename ScannerT>
Chris@16:         struct definition {
Chris@16:         
Chris@16:             definition(time_conversion_grammar const &self)
Chris@16:             {
Chris@16:                 using boost::spirit::classic::int_p;
Chris@16:                 using boost::spirit::classic::add;
Chris@16:                 
Chris@16:             char const *m[] = {
Chris@16:                     "Jan", "Feb", "Mar", "Apr", "May", "Jun", 
Chris@16:                     "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
Chris@16:                 };
Chris@16: 
Chris@16:                 for (int i = 0; i < 12; ++i)
Chris@16:                     add (month, m[i], i);
Chris@16: 
Chris@16:                 time_rule       // expected format is 'Dec 29 2001 11:23:59'
Chris@16:                     =   month[spirit_assign_actor(self.time_stamp.tm_mon)]  
Chris@16:                     >>  int_p[spirit_assign_actor(self.time_stamp.tm_mday)]    
Chris@16:                     >>  int_p[spirit_assign_actor(self.time_stamp.tm_year)]
Chris@16:                     >>  int_p[spirit_assign_actor(self.time_stamp.tm_hour)] >> ':' 
Chris@16:                     >>  int_p[spirit_assign_actor(self.time_stamp.tm_min)] >> ':'
Chris@16:                     >>  int_p[spirit_assign_actor(self.time_stamp.tm_sec)]
Chris@16:                     ;
Chris@16:                     
Chris@16:                 BOOST_SPIRIT_DEBUG_TRACE_RULE(time_rule, TRACE_CPP_TIME_CONVERSION);
Chris@16:             }
Chris@16:             
Chris@16:             boost::spirit::classic::rule<ScannerT> time_rule;
Chris@16:             boost::spirit::classic::symbols<> month;
Chris@16: 
Chris@16:             boost::spirit::classic::rule<ScannerT> const&
Chris@16:             start() const { return time_rule; }
Chris@16:         };
Chris@16:     
Chris@16:         void correct_year() 
Chris@16:         { 
Chris@16:             if (!fYearIsCorrected) {
Chris@16:                 time_stamp.tm_year -= 1900;
Chris@16:                 fYearIsCorrected = true;
Chris@16:             }
Chris@16:         }
Chris@16: 
Chris@16:         mutable tm time_stamp;
Chris@16:         bool fYearIsCorrected;
Chris@16:     };
Chris@16:     
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: // calculate the time of the compilation as a std::time_t to ensure correctness 
Chris@16: // of the saved dfa table 
Chris@16:     class time_conversion_helper
Chris@16:     {
Chris@16:     public:
Chris@16:         time_conversion_helper(char const *act_time) : compile_time(0)
Chris@16:         {
Chris@16:             using namespace boost::spirit::classic;
Chris@16:             
Chris@16:         time_conversion_grammar g;
Chris@16:         parse_info<> pi = parse (act_time, g, space_p);
Chris@16:         
Chris@16:             if (pi.hit) {
Chris@16:                 g.correct_year();
Chris@16:                 compile_time = mktime(&g.time_stamp);
Chris@16:             }
Chris@16:             BOOST_ASSERT(0 != compile_time);        
Chris@16:         }
Chris@16: 
Chris@16:         time_t get_time() const { return compile_time; }
Chris@16:         
Chris@16:     private:
Chris@16:         time_t compile_time; 
Chris@16:     };
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: #undef TRACE_CPP_TIME_CONVERSION
Chris@16: }   // namespace time_conversion 
Chris@16: 
Chris@16: // import time_conversion into the boost::wave::util namespace
Chris@16: using namespace time_conversion;
Chris@16: 
Chris@16: ///////////////////////////////////////////////////////////////////////////////
Chris@16: }   // namespace util
Chris@16: }   // namespace wave
Chris@16: }   // namespace boost
Chris@16: 
Chris@16: // the suffix header occurs after all of the code
Chris@16: #ifdef BOOST_HAS_ABI_HEADERS
Chris@16: #include BOOST_ABI_SUFFIX
Chris@16: #endif
Chris@16: 
Chris@16: #endif // !defined(TIME_CONVERSION_HELPER_HPP_DA97E389_1797_43BA_82AE_B071064B3EF4_INCLUDED)