mirror of https://github.com/ecmwf/eccodes.git
83 lines
2.3 KiB
C
83 lines
2.3 KiB
C
/*
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* (C) Copyright 2005- ECMWF.
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*
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* This software is licensed under the terms of the Apache Licence Version 2.0
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* which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
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*
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* In applying this licence, ECMWF does not waive the privileges and immunities granted to it by
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* virtue of its status as an intergovernmental organisation nor does it submit to any jurisdiction.
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*/
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/*
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* C Implementation: bufr_missing
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*
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* Description: how to handle missing values in BUFR messages.
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*/
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#include "eccodes.h"
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#include <assert.h>
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int main(int argc, char* argv[])
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{
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FILE* in = NULL;
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/* message handle. Required in all the eccodes calls acting on a message.*/
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codes_handle* h = NULL;
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double doubleVal;
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int err = 0;
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int is_missing = 0;
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int cnt = 0;
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const char* infile = "../../data/bufr/syno_1.bufr";
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in = fopen(infile, "rb");
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if (!in) {
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fprintf(stderr, "Error: unable to open file %s\n", infile);
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return 1;
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}
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/* loop over the messages in the BUFR file */
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while ((h = codes_handle_new_from_file(NULL, in, PRODUCT_BUFR, &err)) != NULL || err != CODES_SUCCESS) {
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if (h == NULL) {
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fprintf(stderr, "Error: unable to create handle for message %d\n", cnt);
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cnt++;
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continue;
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}
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printf("message: %d\n", cnt);
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/* we need to instruct ecCodes to expand the descriptors
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i.e. unpack the data values */
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CODES_CHECK(codes_set_long(h, "unpack", 1), 0);
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/* the value of this key is missing in the message*/
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CODES_CHECK(codes_get_double(h, "relativeHumidity", &doubleVal), 0);
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/* we will print "value missing" */
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if (doubleVal == CODES_MISSING_DOUBLE) {
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printf(" --> value missing\n");
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}
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else {
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printf(" --> value present\n");
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}
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is_missing = codes_is_missing(h, "relativeHumidity", &err);
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if (err || !is_missing) {
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fprintf(stderr, "Error: relativeHumidity should be 'missing'\n");
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return 1;
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}
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/* Set some other keys to be missing */
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CODES_CHECK(codes_set_missing(h, "blockNumber"), 0);
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CODES_CHECK(codes_set_missing(h, "#1#heightOfBaseOfCloud"), 0);
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/* delete handle */
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codes_handle_delete(h);
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cnt++;
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}
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fclose(in);
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return 0;
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}
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