implement ISO 8601 durations parsing, cf. #1399

2015-03-02 16:41:03 +01:00
parent 73a2a938b4
commit 7e00a86bb4
4 changed files with 250 additions and 36 deletions
@@ -0,0 +1,102 @@
+/*
+
+Copyright (c) 2015, Project OSRM contributors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted provided that the following conditions are met:
+
+Redistributions of source code must retain the above copyright notice, this list
+of conditions and the following disclaimer.
+Redistributions in binary form must reproduce the above copyright notice, this
+list of conditions and the following disclaimer in the documentation and/or
+other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+*/
+
+#ifndef ISO_8601_DURATION_PARSER_HPP
+#define ISO_8601_DURATION_PARSER_HPP
+
+#include <boost/bind.hpp>
+#include <boost/spirit/include/qi.hpp>
+#include <boost/spirit/include/qi_action.hpp>
+
+namespace qi = boost::spirit::qi;
+
+template <typename Iterator> struct iso_8601_grammar : qi::grammar<Iterator>
+{
+    iso_8601_grammar()
+        : iso_8601_grammar::base_type(iso_period), temp(0), hours(0), minutes(0), seconds(0)
+    {
+        iso_period = qi::lit('P') >> qi::lit('T') >>
+                     ((value >> hour >> value >> minute >> value >> second) |
+                      (value >> hour >> value >> minute) | (value >> hour >> value >> second) |
+                      (value >> hour) | (value >> minute >> value >> second) | (value >> minute) |
+                      (value >> second));
+
+        value = qi::uint_[boost::bind(&iso_8601_grammar<Iterator>::set_temp, this, ::_1)];
+        second = (qi::lit('s') |
+                  qi::lit('S'))[boost::bind(&iso_8601_grammar<Iterator>::set_seconds, this)];
+        minute = (qi::lit('m') |
+                  qi::lit('M'))[boost::bind(&iso_8601_grammar<Iterator>::set_minutes, this)];
+        hour = (qi::lit('h') |
+                qi::lit('H'))[boost::bind(&iso_8601_grammar<Iterator>::set_hours, this)];
+    }
+
+    qi::rule<Iterator> iso_period;
+    qi::rule<Iterator, std::string()> value, hour, minute, second;
+
+    unsigned temp;
+    unsigned hours;
+    unsigned minutes;
+    unsigned seconds;
+
+    void set_temp(unsigned number) { temp = number; }
+
+    void set_hours()
+    {
+        if (temp < 24)
+        {
+            hours = temp;
+        }
+    }
+
+    void set_minutes()
+    {
+        if (temp < 60)
+        {
+            minutes = temp;
+        }
+    }
+
+    void set_seconds()
+    {
+        if (temp < 60)
+        {
+            seconds = temp;
+        }
+    }
+
+    unsigned get_duration() const
+    {
+        unsigned temp = 10 * (3600 * hours + 60 * minutes + seconds);
+        if (temp == 0)
+        {
+            temp = std::numeric_limits<unsigned>::max();
+        }
+        return temp;
+    }
+};
+
+#endif // ISO_8601_DURATION_PARSER_HPP