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Description

This example shows: how to read all the

...

expanded data values from BUFR messages.

Source code

Tabs Container
directionhorizontal


Tabs Page
titleCFortran 90


Code Block
languagecppnone
titlebufr_expanded.cf90
linenumbersfalse
/*!
! *(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.
 */!
!
/*
! *FORTRAN C90 Implementation: bufr_expanded
 *!
! * Description: how to read all the exapandedexpanded data values from BUFR messages.
!
 *!
program */

#include "eccodes.h"

void usage(char* prog) {
bufr_expanded
use eccodes
implicit none
integer            printf("usage:: %s infile\n",prog);
ifile
integer    exit(1);
}

int main(int argc,char* argv[])
{
        char* filename = NULL;
:: iret
integer      FILE* in = NULL;
   :: ibufr
integer    /* message handle. Required in all the eccodes calls acting on a message.*/
:: i
integer    codes_handle* h=NULL;
    
    double *values = NULL;
:: count=0
integer(kind=4)    size_t values_len=0;
    int i, err=0;
:: numberOfValues
real(kind=8), dimension(:), allocatable       int cnt=0;:: values

    if (argc!=2) usage(argv[0]);
    
    filename=argv[1];

    /* open bufr file */
    in=fopen(filename,"r");
    if (!in) {
        printf("ERROR: unable to open file %s\n", filename);
        return 1;
    }
    
    /* loop over the messages in the bufr file */
    while ((h = codes_handle_new_from_file(NULL,in,PRODUCT_BUFR,&err)) != NULL || err != CODES_SUCCESS)
    {call codes_open_file(ifile,'../../data/bufr/syno_1.bufr','r')

  ! The first bufr message is loaded from file,
  ! ibufr is the bufr id to be used in subsequent calls
  call codes_bufr_new_from_file(ifile,ibufr,iret)

  do while (iret/=CODES_END_OF_FILE)

    write(*,*) 'message: ',count

    ! We need to instruct ecCodes to expand all the descriptors
    ! i.e. unpack the data values
    call codes_set(ibufr,"unpack",1);

    ! Get the expanded data values
    call codes_get(ibufr,'numericValues',values)

    numberOfValues=size(values)

    do i=1,numberOfValues
        if (h == NULL) {write(*,*) '  ',i,values(i)
    enddo

    ! Release the  printf("Error: unable to create handle for message %d\n",cnt);bufr message
    call codes_release(ibufr)

    ! Load the next     cnt++;bufr message
            continue;call codes_bufr_new_from_file(ifile,ibufr,iret)

    ! Free   }array
    deallocate(values)

    count=count+1

  end do

  ! Close file
 /* get the size of the values array*/
        CODES_CHECK(codes_get_size(h,"numericValues",&values_len),0);    
        printf("  number of expanded values: %ld\n",values_len);    
    
        /* allocate array for data values */
        values = malloc(values_len*sizeof(double));
      
        /* get the exapanded data values*/
        CODES_CHECK(codes_get_double_array(h,"numericValues",values,&values_len),0);
 
        for(i = 0; i < values_len; i++)
        {
            printf("  %.10e\n",values[i]);call codes_close_file(ifile)

end program bufr_expanded



Tabs Page
titlePython


Code Block
languagepython
titlebufr_expanded.py
linenumbersfalse
# 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.

#
# Python implementation: bufr_get_keys
#
# Description: how to read values of different type of keys from BUFR messages.
#
#

from __future__ import absolute_import

import sys
import traceback

from eccodes import *

INPUT = '../../data/bufr/syno_1.bufr'
VERBOSE = 1  # verbose error reporting


def example():
    # open bufr file
    f = open(INPUT, 'rb')

    cnt = 0

    # loop for the messages in the file
    while 1:
        }
# get handle for message
    
    bufr    free(values);
= codes_bufr_new_from_file(f)
        if bufr is None:
         /* delete handle */break

        codes_handle_delete(h);print("message: %s" % cnt)

        
# we need to instruct ecCodes to expand cnt++;
all the   }descriptors
    
    fclose(in);
    return 0;
}
Tabs Page
titleFortran 90
Code Block
languagenone
titlebufr_expanded.f90
linenumbersfalse
!
!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.
!
!
! FORTRAN 90 Implementation: bufr_expanded
!
! Description: how to read all the exapanded data values from BUFR messages.
!
!
program bufr_expanded
use eccodes
implicit none
integer            :: ifile
integer            :: iret
integer# i.e. unpack the data values
        codes_set(bufr, 'unpack', 1)

        # ----------------------------------
        # get all the expanded data values
        # ----------------------------------
        key = 'numericValues'

        # get size
        num = codes_get_size(bufr, key)
        print('  size of %s is: %s' % (key, num))

        #    :: ibufr
integerget values
        values    :: i
integer= codes_get_array(bufr, key)
        for i   :: count=0
integer(kind=4)in range(len(values)):
    :: numberOfValues 
real(kind=8), dimension(:), allocatable    print("   :: values

  call codes_open_file(ifile,'../../data/bufr/syno_1.bufr','r')

! the first bufr message is loaded from file
! ibufr is the bufr id to be used in subsequent calls
  call codes_bufr_new_from_file(ifile,ibufr,iret)

  do while (iret/=CODES_END_OF_FILE)
    
    ! get and print some keys form the BUFR header 
    write(*,*) 'message: ',count

    ! we need to instruct ecCodes to expand all the descriptors 
    ! i.e. unpack the data values
    call codes_set(ibufr,"unpack",1);
    
    ! get the size of the values array
    call codes_get_size(ibufr,"numericValues",numberOfValues)
    
    print*, '  number of exapanded values:', numberOfValues
    
    ! allocate array for data values
    allocate(values(numberOfValues), stat=iret)
 
    ! get the exapanded data values
    call codes_get(ibufr,'numericValues',values)
 
    do i=1,numberOfValues
        write(*,*) '  ',i,values(i)
    enddo

    ! release the bufr message
    call codes_release(ibufr)

    ! load the next bufr message
    call codes_bufr_new_from_file(ifile,ibufr,iret)
    
    ! free array 
    deallocate(values)
        
    count=count+1
    
  end do  

! close file  
  call codes_close_file(ifile)
 

end program bufr_expanded
Tabs Page
titlePython
%d %.10e" % (i + 1, values[i]))

        cnt += 1

        # delete handle
        codes_release(bufr)

    # close the file
    f.close()


def main():
    try:
        example()
    except CodesInternalError as err:
        if VERBOSE:
            traceback.print_exc(file=sys.stderr)
        else:
            sys.stderr.write(err.msg + '\n')

        return 1


if __name__ == "__main__":
    sys.exit(main())



Tabs Page
titleC


Code Block
languagecpp
titlebufr_expanded.c
linenumbersfalse
/*
 * 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.
 */

/*
 * C Implementation: bufr_expanded
 *
 * Description: how to read all the expanded data values from BUFR messages.
 *
 */

#include "eccodes.h"

static void usage(const char* prog) {
    printf("usage: %s infile\n",prog);
    exit(1);
}

int main(int argc,char* argv[])
{
    char* filename = NULL;
    FILE* in = NULL;

    /* message handle. Required in all the ecCodes calls acting on a message.*/
    codes_handle* h=NULL;

    double *values = NULL;
    size_t values_len=0;
    int i, err=0;
    int cnt=0;

    if (argc!=2) usage(argv[0]);

    filename=argv[1];

    /* open bufr file */
    in=fopen(filename,"rb");
    if (!in) {
        printf("ERROR: unable to open file %s\n", filename);
        return 1;
    }

    /* loop over
Code Block
languagepython
titlebufr_expanded.py
linenumbersfalse
# 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.

#
# Python implementation: bufr_get_keys
#
# Description: how to read values of different type of keys from BUFR messages.
#
#

import traceback
import sys

from eccodes import *

INPUT='../../data/bufr/syno_1.bufr'
VERBOSE=1 # verbose error reporting
  
def example():
    
    # open bufr file
    f = open(INPUT)

    cnt=0    
    
    # loop for the messages in the bufr file */
    while 1:
        # get handle for message((h = codes_handle_new_from_file(NULL, in, PRODUCT_BUFR, &err)) != NULL || err != CODES_SUCCESS)
    {
        if gid(h = codes_bufr_new_from_file(f)= NULL) {
        if gid is None printf("Error: break

unable to create handle     print "message: %s" % cnt
        
        # we need to instruct ecCodes to expand all the descriptors
        # i.e. unpack the data values
        codes_set(gid,'unpack',1);
        
        #-----------------------------------
        # get all the expanded data values
        #-----------------------------------for message %d\n",cnt);
        key='numericValues'
    cnt++;
    
        # get sizecontinue;
        num=codes_get_size(gid,key)}

        print/* get 'the  size of %sthe is: %s' % (key,num)values array*/
        
  CODES_CHECK(codes_get_size(h, "numericValues", &values_len),0);
      # get values
printf("  number of expanded values: %lu\n",  values=codes_get_array(gid,key)_len);

        for/* iallocate in xrange(len(values)):
   array for data values */
        values print "   %d %.10e" % (i+1,values[i])= (double*)malloc(values_len*sizeof(double));

        cnt+=1

     /* get the expanded data values*/
   # delete handle
   CODES_CHECK(codes_get_double_array(h, "numericValues",    codes_release(gid)

values, &values_len),0);

     # close the file
    f.close()

def main():
   for(i = 0; i < values_len; i++)
        try:{
         example()
   printf(" except CodesInternalError,err: %.10e\n",values[i]);
        if VERBOSE:}

         free(values);

   traceback.print_exc(file=sys.stderr)
     /* delete handle else:*/
         codes_handle_delete(h);

   print >>sys.stderr,err.msg

    cnt++;
    return 1}

if  __name__ == "__main__":
 fclose(in);
     sys.exit(main())return 0;
}