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! (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: How to get a GRIB message in memory
!
!
program get_message
use eccodes
implicit none
integer :: err, centre
integer(kind=kindOfInt) :: byte_size
integer(kind=kindOfInt) :: byte_size2
integer :: infile, outfile1, outfile2
integer :: igrib_in
integer :: igrib_out
integer :: igrib_out2
character(len=1), dimension(:), pointer :: mptr
character(len=1), dimension(:), allocatable :: message
character(len=32) :: product_kind1
character(len=32) :: product_kind2
call codes_open_file(infile, '../../data/constant_field.grib1', 'r')
call codes_open_file(outfile1, 'temp.examples_f_grib_get_message.1.grib1', 'W')
call codes_open_file(outfile2, 'temp.examples_f_grib_get_message.2.grib1', 'W')
! A new GRIB message is loaded from file
! igrib_in is the GRIB id to be used in subsequent calls
call codes_grib_new_from_file(infile, igrib_in)
call codes_get_message_size(igrib_in, byte_size)
call grib_get_message(igrib_in, mptr, byte_size2)
if(byte_size == byte_size2) then
write(*,*) "Get message test 1 passed, message SIZES are the same!"
else
write(*,*) "Get message test 1 failed, message SIZES are NOT the same!"
call abort
endif
allocate (message(byte_size), stat=err)
call codes_copy_message(igrib_in, message)
if(ALL(mptr == message)) then
write(*,*) "Get message test 2 passed, message CONTENT is the same!"
else
write(*,*) "Get message test 2 failed, message CONTENT is NOT the same!"
call abort
endif
call codes_new_from_message(igrib_out, message)
call grib_new_from_message_no_copy(igrib_out2, mptr)
call codes_get(igrib_out, 'kindOfProduct', product_kind1)
write (*, *) 'allocatable kindOfProduct=', product_kind1
call codes_get(igrib_out2, 'kindOfProduct', product_kind2)
write (*, *) 'pointer kindOfProduct=', product_kind2
if(product_kind1 == product_kind2) then
write(*,*) "New from message (no copy) test 1 passed, GRIB_GET worked!"
else
write(*,*) "New from message (no copy) test 1 failed, GRIB_GET did NOT work!"
call abort
endif
centre = 75
call codes_set(igrib_out, 'centre', centre)
call codes_set(igrib_out2, 'centre', centre)
call codes_get(igrib_out, 'centre', centre)
write (*, *) 'allocatable centre=', centre
call codes_get(igrib_out2, 'centre', centre)
write (*, *) 'pointer centre=', centre
if(centre == 75) then
write(*,*) "New from message (no copy) test 2 passed, GRIB_SET worked!"
else
write(*,*) "New from message (no copy) test 2 failed, GRIB_SET did NOT work!"
call abort
endif
! Write message to a file
call codes_write(igrib_out, outfile1)
call codes_write(igrib_out2, outfile2)
call codes_release(igrib_out)
call codes_release(igrib_in)
call codes_release(igrib_out2)
call codes_close_file(infile)
call codes_close_file(outfile1)
call codes_close_file(outfile2)
deallocate (message)
end program get_message
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