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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.
#

import traceback
import sys

from eccodes import *

INPUT = '../../data/sample.grib2'
OUTPUT = 'out.mw.grib'
VERBOSE = 1  # verbose error reporting


def example():
    fin = open(INPUT, 'rb')
    fout = open(OUTPUT, 'wb')

    gid = codes_grib_new_from_file(fin)

    mgid = codes_grib_multi_new()

    for step in range(12, 132, 12):
        codes_set(gid, "step", step)
        codes_grib_multi_handle_append(hgid, start_section4, mhmgid);

    } codes_grib_multi_write(mgid, fout)

    /* open output file */codes_grib_multi_release(mgid)
    codes_release(gid)
    of=fopen(ofilename,"w");fin.close()
    if(!of) { fout.close()


def main():
    try:
        fprintf(stderr, "ERROR: unable to open output file %s\n",ofilename);
example()
    except CodesInternalError as err:
        if VERBOSE:
         exit(1);   traceback.print_exc(file=sys.stderr)
    }

    /*else:
 write multi fields handle to output file */
    codes_grib_multi_handle_write(mh,of);
    fclose(of);

    /* release memory */
    codes_handle_delete(h);
    codes_grib_multi_handle_delete(mh);

    fclose(in);
    return 0;
}

!/*
 * (C) Copyright 2005-2015 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.
!
!
!
! 
 */

/*
 * C Implementation: grib_multi_write
 *
 * Description: howHow to createencode aGRIB2 multimessages fieldcontaining messagemultiple infields
 memory and write
!        *
 */
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "eccodes.h"

static void usage(const char* prog) {
       itprintf("usage: %s in.grib a file. The multi field messages can be created
!    out.grib\n",prog);
    exit(1);
}

int main(int argc, char** argv)
{
    int err = 0;
    onlyFILE* in GRIB edition 2.
!
!
!
program grib2_multi_write
  use eccodes
  implicit none
  integer    = NULL;
    FILE* of = NULL;
    long edition, step;
    char* filename=NULL;
    char* ofilename=NULL;
    codes_handle *h = NULL;
       :: infile,outfilecodes_multi_handle *mh=NULL;
  integer  const int start_section = 4; /* Grib2 Product Definition Section */

    if (argc < 3) usage(argv[0]);
    filename=argv[1];
    :: in_gribid,iretofilename=argv[2];

  integer  /* open input file */
    in = fopen(filename,"r");
    if(!in) {
           :: multi_gribid
  integer   fprintf(stderr, "ERROR: unable to open input file %s\n",filename);
        return 1;
    }

    /* new grib handle from input   :: step,startsection
file */
  ! multi fieldh messages can be created only in edition 2 
  call codes_open_file(infile,'../../data/sample.grib2','r')

  call codes_open_file(outfile,'multi_created.grib2','w')

  !     a grib message is loaded from file
  !     in_gribid is the grib id to be used in subsequent calls
  call codes_grib_new_from_file(infile,in_gribid)

  startsection=4
  do step=0,240,12

    call codes_set(in_gribid,"step",step)
    call codes_grib_multi_append(in_gribid,startsection,multi_gribid)

  enddo

!  write messages to a file
  call codes_grib_multi_write(multi_gribid,outfile)

  call codes_release(in_gribid)
  call codes_release(multi_gribid)

  call codes_close_file(infile)
  call codes_close_file(outfile)

end program grib2_multi_write