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/*=============================================================================
Boost.Wave: A Standard compliant C++ preprocessor library
http://www.boost.org/
Copyright (c) 2001-2011 Hartmut Kaiser. 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)
=============================================================================*/
#if !defined(TIME_CONVERSION_HELPER_HPP_DA97E389_1797_43BA_82AE_B071064B3EF4_INCLUDED)
#define TIME_CONVERSION_HELPER_HPP_DA97E389_1797_43BA_82AE_B071064B3EF4_INCLUDED
#include <ctime>
#include <cstring>
#include <boost/config.hpp>
#include <boost/spirit/include/classic_core.hpp>
#include <boost/spirit/include/classic_symbols.hpp>
#include <boost/spirit/include/classic_assign_actor.hpp>
#include <boost/spirit/include/classic_push_back_actor.hpp>
#if !defined(spirit_append_actor)
#define spirit_append_actor(actor) boost::spirit::classic::push_back_a(actor)
#define spirit_assign_actor(actor) boost::spirit::classic::assign_a(actor)
#endif // !defined(spirit_append_actor)
// this must occur after all of the includes and before any code appears
#ifdef BOOST_HAS_ABI_HEADERS
#include BOOST_ABI_PREFIX
#endif
///////////////////////////////////////////////////////////////////////////////
namespace boost {
namespace wave {
namespace util {
namespace time_conversion {
using namespace std; // some systems have std::tm etc. in namespace std
///////////////////////////////////////////////////////////////////////////////
// define, whether the rule's should generate some debug output
#define TRACE_CPP_TIME_CONVERSION \
(BOOST_SPIRIT_DEBUG_FLAGS_CPP & BOOST_SPIRIT_DEBUG_FLAGS_TIME_CONVERSION) \
/**/
///////////////////////////////////////////////////////////////////////////////
// Grammar for parsing a date/time string generated by the C++ compiler from
// __DATE__ and __TIME__
class time_conversion_grammar :
public boost::spirit::classic::grammar<time_conversion_grammar>
{
public:
time_conversion_grammar() : fYearIsCorrected(false)
{
using namespace std; // some systems have memset in std
memset (&time_stamp, 0, sizeof(tm));
BOOST_SPIRIT_DEBUG_TRACE_RULE_NAME(*this, "time_conversion_grammar",
TRACE_CPP_TIME_CONVERSION);
}
template <typename ScannerT>
struct definition {
definition(time_conversion_grammar const &self)
{
using boost::spirit::classic::int_p;
using boost::spirit::classic::add;
char const *m[] = {
"Jan", "Feb", "Mar", "Apr", "May", "Jun",
"Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
};
for (int i = 0; i < 12; ++i)
add (month, m[i], i);
time_rule // expected format is 'Dec 29 2001 11:23:59'
= month[spirit_assign_actor(self.time_stamp.tm_mon)]
>> int_p[spirit_assign_actor(self.time_stamp.tm_mday)]
>> int_p[spirit_assign_actor(self.time_stamp.tm_year)]
>> int_p[spirit_assign_actor(self.time_stamp.tm_hour)] >> ':'
>> int_p[spirit_assign_actor(self.time_stamp.tm_min)] >> ':'
>> int_p[spirit_assign_actor(self.time_stamp.tm_sec)]
;
BOOST_SPIRIT_DEBUG_TRACE_RULE(time_rule, TRACE_CPP_TIME_CONVERSION);
}
boost::spirit::classic::rule<ScannerT> time_rule;
boost::spirit::classic::symbols<> month;
boost::spirit::classic::rule<ScannerT> const&
start() const { return time_rule; }
};
void correct_year()
{
if (!fYearIsCorrected) {
time_stamp.tm_year -= 1900;
fYearIsCorrected = true;
}
}
mutable tm time_stamp;
bool fYearIsCorrected;
};
///////////////////////////////////////////////////////////////////////////////
// calculate the time of the compilation as a std::time_t to ensure correctness
// of the saved dfa table
class time_conversion_helper
{
public:
time_conversion_helper(char const *act_time) : compile_time(0)
{
using namespace boost::spirit::classic;
time_conversion_grammar g;
parse_info<> pi = parse (act_time, g, space_p);
if (pi.hit) {
g.correct_year();
compile_time = mktime(&g.time_stamp);
}
BOOST_ASSERT(0 != compile_time);
}
time_t get_time() const { return compile_time; }
private:
time_t compile_time;
};
///////////////////////////////////////////////////////////////////////////////
#undef TRACE_CPP_TIME_CONVERSION
} // namespace time_conversion
// import time_conversion into the boost::wave::util namespace
using namespace time_conversion;
///////////////////////////////////////////////////////////////////////////////
} // namespace util
} // namespace wave
} // namespace boost
// the suffix header occurs after all of the code
#ifdef BOOST_HAS_ABI_HEADERS
#include BOOST_ABI_SUFFIX
#endif
#endif // !defined(TIME_CONVERSION_HELPER_HPP_DA97E389_1797_43BA_82AE_B071064B3EF4_INCLUDED)
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