1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
|
/*
* (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.
*/
/*
* C Implementation: bufr_missing
*
* Description: how to handle missing values in BUFR messages.
*/
#include "eccodes.h"
int main(int argc, char* argv[])
{
FILE* in = NULL;
/* message handle. Required in all the eccodes calls acting on a message.*/
codes_handle* h = NULL;
double doubleVal;
int err = 0;
int is_missing = 0;
int cnt = 0;
const char* infile = "../../data/bufr/syno_1.bufr";
in = fopen(infile, "rb");
if (!in) {
fprintf(stderr, "Error: unable to open file %s\n", infile);
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) {
if (h == NULL) {
fprintf(stderr, "Error: unable to create handle for message %d\n", cnt);
cnt++;
continue;
}
printf("message: %d\n", cnt);
/* we need to instruct ecCodes to expand the descriptors
i.e. unpack the data values */
CODES_CHECK(codes_set_long(h, "unpack", 1), 0);
/* the value of this key is missing in the message*/
CODES_CHECK(codes_get_double(h, "relativeHumidity", &doubleVal), 0);
/* we will print "value missing" */
if (doubleVal == CODES_MISSING_DOUBLE) {
printf(" --> value missing\n");
}
else {
printf(" --> value present\n");
}
is_missing = codes_is_missing(h, "relativeHumidity", &err);
if (err || !is_missing) {
fprintf(stderr, "Error: relativeHumidity should be 'missing'\n");
return 1;
}
/* Set some other keys to be missing */
CODES_CHECK(codes_set_missing(h, "blockNumber"), 0);
CODES_CHECK(codes_set_missing(h, "#1#heightOfBaseOfCloud"), 0);
/* delete handle */
codes_handle_delete(h);
cnt++;
}
fclose(in);
return 0;
}
|
