/usr/share/gnudatalanguage/coyote/cgjulian2date.pro is in gdl-coyote 2016.11.13-2.
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;
; NAME:
; cgJulian2Date
;
; PURPOSE:
; The purpose of this function is to convert a Julian number into a date string. The format
; of the string is selected with the Format keyword.
;
;******************************************************************************************;
; ;
; Copyright (c) 2013, by Fanning Software Consulting, Inc. 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. ;
; * Neither the name of Fanning Software Consulting, Inc. nor the names of its ;
; contributors may be used to endorse or promote products derived from this ;
; software without specific prior written permission. ;
; ;
; THIS SOFTWARE IS PROVIDED BY FANNING SOFTWARE CONSULTING, INC. ''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 FANNING SOFTWARE CONSULTING, INC. 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; ;
; 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. ;
;******************************************************************************************;
;
;+
; The purpose of this function is to convert a Julian number into a date string. The format
; of the string is selected with the `Format` keyword.
;
; :Categories:
; Utilities
;
; :Returns:
; A string or string array of dates corresponding to the Julian number that is input.
;
; :Params:
; jnumber: in, required, type=long
; The Julian number that is to be converted. This may be an array of Julian numbers.
;
; :Keywords:
; format: in, optional, type=integer, default=0
; An integer value that selects the date format.
; Possible values are::
; 0: 09 Jan 1951
; 1: 09 Jan 1951 08:21:10
; 2: 09 Jan 1951 08h 21m 10s
; 3: Jan 9, 1951
; 4: Jan 9, 1951 08:21:10
; 5: Jan 9, 1951 08h 21m 10s
; 6: 09 JAN 1951
; 7: 09 JAN 1951 08:21:10
; 8: 09 JAN 1951 08h 21m 10s
; 9: JAN 9, 1951
; 10: JAN 9, 1951 08:21:10
; 11: JAN 9, 1951 08h 21m 10s
; 12: 09 January 1951
; 13: 09 January 1951 08:21:10
; 14: 09 January 1951 08h 21m 10s
; 15: January 9, 1951
; 16: January 9, 1951 08:21:10
; 17: January 9, 1951 08h 21m 10s
; 18: 01091951
; 19: 09011951
; 20: 19510109
;
; :Examples:
; IDL> jnumber = Julday(8, 9, 1951, 8, 21, 10)
; IDL> Print, cgJulian2Date(jnumber, Format=1)
; 09 Aug 1951 12:00:00
;
; :Author:
; FANNING SOFTWARE CONSULTING::
; David W. Fanning
; 1645 Sheely Drive
; Fort Collins, CO 80526 USA
; Phone: 970-221-0438
; E-mail: david@idlcoyote.com
; Coyote's Guide to IDL Programming: http://www.idlcoyote.com
;
; :History:
; Change History::
; Written, 9 January 2013 by David W. Fanning.
; Added formats 18 through 20. 1 Feb 2013. DWF.
;
; :Copyright:
; Copyright (c) 2013, Fanning Software Consulting, Inc.
;-
FUNCTION cgJulian2Date, jnumber, FORMAT=format
; Return to caller, on error
On_Error, 2
; Get today's date, if argument is not present.
IF N_Elements(jnumber) EQ 0 THEN jnumber = Systime(/JULIAN)
IF N_Elements(format) EQ 0 THEN format = 0
; Set up an array for storing the time string.
num = N_Elements(jnumber)
timeString = StrArr(num)
; Process the Julian day values.
CalDat, jnumber, month, day, year, hour, minute, second
; Format the values.
CASE format OF
0: date = String(day, Format='(I2.2)') + ' ' + cgMonths(month, /ABBREVIATION) + $
' ' + String(year, Format='(I4)')
1: date = String(day, Format='(I2.2)') + ' ' + cgMonths(month, /ABBREVIATION) + $
' ' + String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + ':' + $
String(minute, Format='(I2.2)') + ':' + String(second, Format='(I2.2)')
2: date = String(day, Format='(I2.2)') + ' ' + cgMonths(month, /ABBREVIATION) + $
' ' + String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + 'h ' + $
String(minute, Format='(I2.2)') + 'm ' + String(second, Format='(I2.2)') + 's'
3: date = cgMonths(month, /ABBREVIATION) + ' ' + String(day, Format='(I0.2)') + ', ' + $
String(year, Format='(I4)')
4: date = cgMonths(month, /ABBREVIATION) + ' ' + String(day, Format='(I0.2)') + ', ' + $
String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + ':' + $
String(minute, Format='(I2.2)') + ':' + String(second, Format='(I2.2)')
5: date = cgMonths(month, /ABBREVIATION) + ' ' + String(day, Format='(I0.2)') + ', ' + $
String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + 'h ' + $
String(minute, Format='(I2.2)') + 'm ' + String(second, Format='(I2.2)') + 's'
6: date = String(day, Format='(I2.2)') + ' ' + cgMonths(month, /ABBREVIATION, /ALLCAPS) + $
' ' + String(year, Format='(I4)')
7: date = String(day, Format='(I2.2)') + ' ' + cgMonths(month, /ABBREVIATION, /ALLCAPS) + $
' ' + String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + ':' + $
String(minute, Format='(I2.2)') + ':' + String(second, Format='(I2.2)')
8: date = String(day, Format='(I2.2)') + ' ' + cgMonths(month, /ABBREVIATION, /ALLCAPS) + $
' ' + String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + 'h ' + $
String(minute, Format='(I2.2)') + 'm ' + String(second, Format='(I2.2)') + 's'
9: date = cgMonths(month, /ABBREVIATION, /ALLCAPS) + ' ' + String(day, Format='(I0.2)') + ', ' + $
String(year, Format='(I4)')
10: date = cgMonths(month, /ABBREVIATION, /ALLCAPS) + ' ' + String(day, Format='(I0.2)') + ', ' + $
String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + ':' + $
String(minute, Format='(I2.2)') + ':' + String(second, Format='(I2.2)')
11: date = cgMonths(month, /ABBREVIATION, /ALLCAPS) + ' ' + String(day, Format='(I0.2)') + ', ' + $
String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + 'h ' + $
String(minute, Format='(I2.2)') + 'm ' + String(second, Format='(I2.2)') + 's'
12: date = String(day, Format='(I2.2)') + ' ' + cgMonths(month) + $
' ' + String(year, Format='(I4)')
13: date = String(day, Format='(I2.2)') + ' ' + cgMonths(month) + $
' ' + String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + ':' + $
String(minute, Format='(I2.2)') + ':' + String(second, Format='(I2.2)')
14: date = String(day, Format='(I2.2)') + ' ' + cgMonths(month) + $
' ' + String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + 'h ' + $
String(minute, Format='(I2.2)') + 'm ' + String(second, Format='(I2.2)') + 's'
15: date = cgMonths(month) + ' ' + String(day, Format='(I0.2)') + ', ' + $
String(year, Format='(I4)')
16: date = cgMonths(month) + ' ' + String(day, Format='(I0.2)') + ', ' + $
String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + ':' + $
String(minute, Format='(I2.2)') + ':' + String(second, Format='(I2.2)')
17: date = cgMonths(month) + ' ' + String(day, Format='(I0.2)') + ', ' + $
String(year, Format='(I4)') + ' ' + String(hour, Format='(I2.2)') + 'h ' + $
String(minute, Format='(I2.2)') + 'm ' + String(second, Format='(I2.2)') + 's'
18: date = String(day, Format='(I2.2)') + String(month, Format='(I2.2)') + String(year, Format='(I4)')
19: date = String(month, Format='(I2.2)') + String(day, Format='(I2.2)') + String(year, Format='(I4)')
20: date = String(year, Format='(I4)') + String(month, Format='(I2.2)') + String(day, Format='(I2.2)')
ENDCASE
; Make sure you return a scalar, if needed.
IF num EQ 1 THEN RETURN, date[0] ELSE RETURN, date
END
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