[857] | 1 | /*=============================================================================
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| 2 | Boost.Wave: A Standard compliant C++ preprocessor library
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| 3 |
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| 4 | http://www.boost.org/
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| 5 |
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| 6 | Copyright (c) 2001-2005 Hartmut Kaiser. Distributed under the Boost
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| 7 | Software License, Version 1.0. (See accompanying file
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| 8 | LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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| 9 | =============================================================================*/
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| 10 |
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| 11 | #if !defined(TIME_CONVERSION_HELPER_HPP_DA97E389_1797_43BA_82AE_B071064B3EF4_INCLUDED)
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| 12 | #define TIME_CONVERSION_HELPER_HPP_DA97E389_1797_43BA_82AE_B071064B3EF4_INCLUDED
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| 13 |
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| 14 | #include <ctime>
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| 15 | #include <boost/spirit/core.hpp>
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| 16 | #include <boost/spirit/symbols.hpp>
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| 17 | #if SPIRIT_VERSION >= 0x1700
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| 18 | #include <boost/spirit/actor/assign_actor.hpp>
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| 19 | #include <boost/spirit/actor/push_back_actor.hpp>
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| 20 | #endif // SPIRIT_VERSION >= 0x1700
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| 21 |
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| 22 | #if !defined(spirit_append_actor)
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| 23 | #if SPIRIT_VERSION >= 0x1700
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| 24 | #define spirit_append_actor(actor) boost::spirit::push_back_a(actor)
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| 25 | #define spirit_assign_actor(actor) boost::spirit::assign_a(actor)
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| 26 | #else
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| 27 | #define spirit_append_actor(actor) boost::spirit::append(actor)
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| 28 | #define spirit_assign_actor(actor) boost::spirit::assign(actor)
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| 29 | #endif // SPIRIT_VERSION >= 0x1700
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| 30 | #endif // !defined(spirit_append_actor)
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| 31 |
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| 32 | ///////////////////////////////////////////////////////////////////////////////
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| 33 | namespace boost {
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| 34 | namespace wave {
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| 35 | namespace util {
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| 36 |
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| 37 | namespace time_conversion {
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| 38 |
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| 39 | using namespace std; // some systems have std::tm etc. in namespace std
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| 40 |
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| 41 | ///////////////////////////////////////////////////////////////////////////////
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| 42 | // define, whether the rule's should generate some debug output
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| 43 | #define TRACE_CPP_TIME_CONVERSION \
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| 44 | (BOOST_SPIRIT_DEBUG_FLAGS_CPP & BOOST_SPIRIT_DEBUG_FLAGS_TIME_CONVERSION) \
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| 45 | /**/
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| 46 |
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| 47 | ///////////////////////////////////////////////////////////////////////////////
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| 48 | // Grammar for parsing a date/time string generated by the C++ compiler from
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| 49 | // __DATE__ and __TIME__
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| 50 | class time_conversion_grammar :
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| 51 | public boost::spirit::grammar<time_conversion_grammar>
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| 52 | {
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| 53 | public:
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| 54 | time_conversion_grammar() : fYearIsCorrected(false)
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| 55 | {
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| 56 | using namespace std; // some systems have memset in std
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| 57 | memset (&time_stamp, 0, sizeof(tm));
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| 58 | BOOST_SPIRIT_DEBUG_TRACE_RULE_NAME(*this, "time_conversion_grammar",
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| 59 | TRACE_CPP_TIME_CONVERSION);
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| 60 | }
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| 61 |
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| 62 | template <typename ScannerT>
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| 63 | struct definition {
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| 64 |
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| 65 | definition(time_conversion_grammar const &self)
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| 66 | {
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| 67 | using boost::spirit::int_p;
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| 68 | using boost::spirit::add;
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| 69 |
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| 70 | char const *m[] = {
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| 71 | "Jan", "Feb", "Mar", "Apr", "May", "Jun",
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| 72 | "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
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| 73 | };
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| 74 |
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| 75 | for (int i = 0; i < 12; ++i)
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| 76 | add (month, m[i], i);
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| 77 |
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| 78 | time_rule // expected format is 'Dec 29 2001 11:23:59'
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| 79 | = month[spirit_assign_actor(self.time_stamp.tm_mon)]
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| 80 | >> int_p[spirit_assign_actor(self.time_stamp.tm_mday)]
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| 81 | >> int_p[spirit_assign_actor(self.time_stamp.tm_year)]
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| 82 | >> int_p[spirit_assign_actor(self.time_stamp.tm_hour)] >> ':'
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| 83 | >> int_p[spirit_assign_actor(self.time_stamp.tm_min)] >> ':'
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| 84 | >> int_p[spirit_assign_actor(self.time_stamp.tm_sec)]
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| 85 | ;
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| 86 |
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| 87 | BOOST_SPIRIT_DEBUG_TRACE_RULE(time_rule, TRACE_CPP_TIME_CONVERSION);
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| 88 | }
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| 89 |
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| 90 | boost::spirit::rule<ScannerT> time_rule;
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| 91 | boost::spirit::symbols<> month;
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| 92 |
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| 93 | boost::spirit::rule<ScannerT> const&
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| 94 | start() const { return time_rule; }
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| 95 | };
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| 96 |
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| 97 | void correct_year()
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| 98 | {
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| 99 | if (!fYearIsCorrected) {
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| 100 | time_stamp.tm_year -= 1900;
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| 101 | fYearIsCorrected = true;
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| 102 | }
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| 103 | }
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| 104 |
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| 105 | mutable tm time_stamp;
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| 106 | bool fYearIsCorrected;
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| 107 | };
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| 108 |
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| 109 | ///////////////////////////////////////////////////////////////////////////////
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| 110 | // calculate the time of the compilation as a std::time_t to ensure correctness
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| 111 | // of the saved dfa table
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| 112 | class time_conversion_helper
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| 113 | {
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| 114 | public:
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| 115 | time_conversion_helper(char const *act_time) : compile_time(0)
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| 116 | {
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| 117 | using namespace boost::spirit;
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| 118 |
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| 119 | time_conversion_grammar g;
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| 120 | parse_info<> pi = parse (act_time, g, space_p);
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| 121 |
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| 122 | if (pi.hit) {
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| 123 | g.correct_year();
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| 124 | compile_time = mktime(&g.time_stamp);
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| 125 | }
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| 126 | BOOST_ASSERT(0 != compile_time);
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| 127 | }
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| 128 |
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| 129 | time_t get_time() const { return compile_time; }
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| 130 |
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| 131 | private:
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| 132 | time_t compile_time;
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| 133 | };
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| 134 |
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| 135 | ///////////////////////////////////////////////////////////////////////////////
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| 136 | #undef TRACE_CPP_TIME_CONVERSION
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| 137 | } // namespace time_conversion
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| 138 |
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| 139 | // import time_conversion into the boost::wave::util namespace
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| 140 | using namespace time_conversion;
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| 141 |
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| 142 | ///////////////////////////////////////////////////////////////////////////////
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| 143 | } // namespace util
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| 144 | } // namespace wave
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| 145 | } // namespace boost
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| 146 |
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| 147 | #endif // !defined(TIME_CONVERSION_HELPER_HPP_DA97E389_1797_43BA_82AE_B071064B3EF4_INCLUDED)
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