FUNCTION time_to_string( time )

!--------------------------------------------------------------------------------!
! This file is part of PALM.
!
! PALM is free software: you can redistribute it and/or modify it under the terms
! of the GNU General Public License as published by the Free Software Foundation,
! either version 3 of the License, or (at your option) any later version.
!
! PALM is distributed in the hope that it will be useful, but WITHOUT ANY
! WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
! A PARTICULAR PURPOSE.  See the GNU General Public License for more details.
!
! You should have received a copy of the GNU General Public License along with
! PALM. If not, see <http://www.gnu.org/licenses/>.
!
! Copyright 1997-2012  Leibniz University Hannover
!--------------------------------------------------------------------------------!
!
! Current revisions:
! -----------------
! 
!
! Former revisions:
! -----------------
! $Id: time_to_string.f90 1037 2012-10-22 14:10:22Z witha $
!
! 1036 2012-10-22 13:43:42Z raasch
! code put under GPL (PALM 3.9)
!
! RCS Log replace by Id keyword, revision history cleaned up
!
! Revision 1.3  2001/01/22 08:16:04  raasch
! Comments translated into English
!
! Revision 1.1  1997/08/11 06:26:08  raasch
! Initial revision
!
!
! Description:
! ------------
! Transforming the time from real to character-string hh:mm:ss
!------------------------------------------------------------------------------!

    IMPLICIT NONE

    CHARACTER (LEN=9) ::  time_to_string
    INTEGER           ::  hours, minutes, seconds
    REAL              ::  rest_time, time

!
!-- Calculate the number of hours, minutes, and seconds
    hours     = INT( time / 3600.0 )
    rest_time = time - hours * 3600
    minutes   = INT( rest_time / 60.0 )
    seconds   = rest_time - minutes * 60

!
!-- Build the string
    IF ( hours < 100 )  THEN
       WRITE (time_to_string,'(I2.2,'':'',I2.2,'':'',I2.2)')  hours, minutes, &
                                                              seconds
    ELSE
       WRITE (time_to_string,'(I3.3,'':'',I2.2,'':'',I2.2)')  hours, minutes, &
                                                              seconds
    ENDIF

 END FUNCTION time_to_string