! (C) Copyright 2005- ECMWF.
!
! This software is licensed under the terms of the Apache Licence Version 2.0
! which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
!
! In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
! virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
!
!
!  Description: Prints all the data contained in a GRIB file
!
!
program print_data
   use eccodes
   implicit none
   integer            :: ifile
   integer            :: iret
   integer            :: igrib
   integer            :: i
   real(kind=8), dimension(:), allocatable       :: values
   integer(kind=4)    :: numPoints
   real(kind=8)       :: average
   real(kind=8)       :: the_max
   real(kind=8)       :: the_min

   call codes_open_file(ifile, '../../data/constant_field.grib1', 'r')

   ! a new GRIB message is loaded from file
   ! igrib is the grib id to be used in subsequent calls
   call codes_grib_new_from_file(ifile, igrib)

   ! get the size of the values array
   call codes_get_size(igrib, 'values', numPoints)

   ! get data values
   print *, 'number of points ', numPoints
   allocate (values(numPoints), stat=iret)

   call codes_get(igrib, 'values', values)

   do i = 1, numPoints
      write (*, *) '  ', i, values(i)
   end do

   write (*, *) numPoints, ' values found '

   call codes_get(igrib, 'max', the_max)
   write (*, *) 'max=', the_max
   call codes_get(igrib, 'min', the_min)
   write (*, *) 'min=', the_min
   call codes_get(igrib, 'average', average)
   write (*, *) 'average=', average

   call codes_release(igrib)
   call codes_close_file(ifile)
   deallocate (values)

end program print_data