diff options
Diffstat (limited to 'date.go')
| -rw-r--r-- | date.go | 26 |
1 files changed, 13 insertions, 13 deletions
@@ -8,12 +8,12 @@ import ( // timeLocationUTC defined the UTC time location. var timeLocationUTC, _ = time.LoadLocation("UTC") -// timeToUTCTime provides function to convert time to UTC time. +// timeToUTCTime provides a function to convert time to UTC time. func timeToUTCTime(t time.Time) time.Time { return time.Date(t.Year(), t.Month(), t.Day(), t.Hour(), t.Minute(), t.Second(), t.Nanosecond(), timeLocationUTC) } -// timeToExcelTime provides function to convert time to Excel time. +// timeToExcelTime provides a function to convert time to Excel time. func timeToExcelTime(t time.Time) float64 { // TODO in future this should probably also handle date1904 and like TimeFromExcelTime var excelTime float64 @@ -32,7 +32,7 @@ func timeToExcelTime(t time.Time) float64 { return excelTime + float64(t.UnixNano())/8.64e13 + 25569.0 } -// shiftJulianToNoon provides function to process julian date to noon. +// shiftJulianToNoon provides a function to process julian date to noon. func shiftJulianToNoon(julianDays, julianFraction float64) (float64, float64) { switch { case -0.5 < julianFraction && julianFraction < 0.5: @@ -47,7 +47,7 @@ func shiftJulianToNoon(julianDays, julianFraction float64) (float64, float64) { return julianDays, julianFraction } -// fractionOfADay provides function to return the integer values for hour, +// fractionOfADay provides a function to return the integer values for hour, // minutes, seconds and nanoseconds that comprised a given fraction of a day. // values would round to 1 us. func fractionOfADay(fraction float64) (hours, minutes, seconds, nanoseconds int) { @@ -68,7 +68,7 @@ func fractionOfADay(fraction float64) (hours, minutes, seconds, nanoseconds int) return } -// julianDateToGregorianTime provides function to convert julian date to +// julianDateToGregorianTime provides a function to convert julian date to // gregorian time. func julianDateToGregorianTime(part1, part2 float64) time.Time { part1I, part1F := math.Modf(part1) @@ -81,12 +81,12 @@ func julianDateToGregorianTime(part1, part2 float64) time.Time { return time.Date(year, time.Month(month), day, hours, minutes, seconds, nanoseconds, time.UTC) } -// By this point generations of programmers have repeated the algorithm sent to -// the editor of "Communications of the ACM" in 1968 (published in CACM, volume -// 11, number 10, October 1968, p.657). None of those programmers seems to have -// found it necessary to explain the constants or variable names set out by -// Henry F. Fliegel and Thomas C. Van Flandern. Maybe one day I'll buy that -// jounal and expand an explanation here - that day is not today. +// By this point generations of programmers have repeated the algorithm sent +// to the editor of "Communications of the ACM" in 1968 (published in CACM, +// volume 11, number 10, October 1968, p.657). None of those programmers seems +// to have found it necessary to explain the constants or variable names set +// out by Henry F. Fliegel and Thomas C. Van Flandern. Maybe one day I'll buy +// that jounal and expand an explanation here - that day is not today. func doTheFliegelAndVanFlandernAlgorithm(jd int) (day, month, year int) { l := jd + 68569 n := (4 * l) / 146097 @@ -101,8 +101,8 @@ func doTheFliegelAndVanFlandernAlgorithm(jd int) (day, month, year int) { return d, m, y } -// timeFromExcelTime provides function to convert an excelTime representation -// (stored as a floating point number) to a time.Time. +// timeFromExcelTime provides a function to convert an excelTime +// representation (stored as a floating point number) to a time.Time. func timeFromExcelTime(excelTime float64, date1904 bool) time.Time { const MDD int64 = 106750 // Max time.Duration Days, aprox. 290 years var date time.Time |