Function serializeDate

test/json3.js:321–386

(value)

        // Internal: Serializes a date object.
        var serializeDate = function (value) {
          var getData, year, month, date, time, hours, minutes, seconds, milliseconds;
          // Define additional utility methods if the `Date` methods are buggy.
          if (!isExtended) {
            var floor = Math.floor;
            // A mapping between the months of the year and the number of days between
            // January 1st and the first of the respective month.
            var Months = [0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334];
            // Internal: Calculates the number of days between the Unix epoch and the
            // first day of the given month.
            var getDay = function (year, month) {
              return Months[month] + 365 * (year - 1970) + floor((year - 1969 + (month = +(month > 1))) / 4) - floor((year - 1901 + month) / 100) + floor((year - 1601 + month) / 400);
            };
            getData = function (value) {
              // Manually compute the year, month, date, hours, minutes,
              // seconds, and milliseconds if the `getUTC*` methods are
              // buggy. Adapted from @Yaffle's `date-shim` project.
              date = floor(value / 864e5);
              for (year = floor(date / 365.2425) + 1970 - 1; getDay(year + 1, 0) <= date; year++);
              for (month = floor((date - getDay(year, 0)) / 30.42); getDay(year, month + 1) <= date; month++);
              date = 1 + date - getDay(year, month);
              // The `time` value specifies the time within the day (see ES
              // 5.1 section 15.9.1.2). The formula `(A % B + B) % B` is used
              // to compute `A modulo B`, as the `%` operator does not
              // correspond to the `modulo` operation for negative numbers.
              time = (value % 864e5 + 864e5) % 864e5;
              // The hours, minutes, seconds, and milliseconds are obtained by
              // decomposing the time within the day. See section 15.9.1.10.
              hours = floor(time / 36e5) % 24;
              minutes = floor(time / 6e4) % 60;
              seconds = floor(time / 1e3) % 60;
              milliseconds = time % 1e3;
            };
          } else {
            getData = function (value) {
              year = value.getUTCFullYear();
              month = value.getUTCMonth();
              date = value.getUTCDate();
              hours = value.getUTCHours();
              minutes = value.getUTCMinutes();
              seconds = value.getUTCSeconds();
              milliseconds = value.getUTCMilliseconds();
            };
          }
          serializeDate = function (value) {
            if (value > -1 / 0 && value < 1 / 0) {
              // Dates are serialized according to the `Date#toJSON` method
              // specified in ES 5.1 section 15.9.5.44. See section 15.9.1.15
              // for the ISO 8601 date time string format.
              getData(value);
              // Serialize extended years correctly.
              value = (year <= 0 || year >= 1e4 ? (year < 0 ? "-" : "+") + toPaddedString(6, year < 0 ? -year : year) : toPaddedString(4, year)) +
              "-" + toPaddedString(2, month + 1) + "-" + toPaddedString(2, date) +
              // Months, dates, hours, minutes, and seconds should have two
              // digits; milliseconds should have three.
              "T" + toPaddedString(2, hours) + ":" + toPaddedString(2, minutes) + ":" + toPaddedString(2, seconds) +
              // Milliseconds are optional in ES 5.0, but required in 5.1.
              "." + toPaddedString(3, milliseconds) + "Z";