76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
#ifndef ISO_8601_DURATION_PARSER_HPP
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#define ISO_8601_DURATION_PARSER_HPP
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#include <boost/bind.hpp>
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#include <boost/spirit/include/qi.hpp>
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#include <boost/spirit/include/qi_action.hpp>
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namespace qi = boost::spirit::qi;
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template <typename Iterator> struct iso_8601_grammar : qi::grammar<Iterator>
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{
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iso_8601_grammar()
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: iso_8601_grammar::base_type(iso_period), temp(0), hours(0), minutes(0), seconds(0)
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{
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iso_period = qi::lit('P') >> qi::lit('T') >>
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((value >> hour >> value >> minute >> value >> second) |
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(value >> hour >> value >> minute) | (value >> hour >> value >> second) |
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(value >> hour) | (value >> minute >> value >> second) | (value >> minute) |
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(value >> second));
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value = qi::uint_[boost::bind(&iso_8601_grammar<Iterator>::set_temp, this, ::_1)];
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second = (qi::lit('s') |
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qi::lit('S'))[boost::bind(&iso_8601_grammar<Iterator>::set_seconds, this)];
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minute = (qi::lit('m') |
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qi::lit('M'))[boost::bind(&iso_8601_grammar<Iterator>::set_minutes, this)];
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hour = (qi::lit('h') |
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qi::lit('H'))[boost::bind(&iso_8601_grammar<Iterator>::set_hours, this)];
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}
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qi::rule<Iterator> iso_period;
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qi::rule<Iterator, std::string()> value, hour, minute, second;
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unsigned temp;
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unsigned hours;
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unsigned minutes;
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unsigned seconds;
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void set_temp(unsigned number) { temp = number; }
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void set_hours()
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{
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if (temp < 24)
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{
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hours = temp;
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}
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}
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void set_minutes()
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{
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if (temp < 60)
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{
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minutes = temp;
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}
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}
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void set_seconds()
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{
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if (temp < 60)
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{
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seconds = temp;
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}
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}
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unsigned get_duration() const
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{
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unsigned temp = (3600 * hours + 60 * minutes + seconds);
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if (temp == 0)
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{
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temp = std::numeric_limits<unsigned>::max();
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}
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return temp;
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}
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};
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#endif // ISO_8601_DURATION_PARSER_HPP
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