Examples: Add comments and sanity checks
#include <stdio.h>
#include <stdlib.h>
+#include <assert.h>
#include "eccodes.h"
int main(int argc, char** argv)
{
- int err = 0;
- size_t size = 0;
+ int err = 0, i = 0, NUM_MISSING = 10;
FILE* in = NULL;
const char* infile = "../../data/regular_latlon_surface.grib1";
@@ -31,10 +31,10 @@ int main(int argc, char** argv)
const char* outfile = "out.set_bitmap_c.grib";
codes_handle* h = NULL;
const void* buffer = NULL;
- size_t values_len;
+ size_t values_len = 0, size = 0;
+ long num_of_data_points = 0, num_of_coded_values = 0, num_of_missing = 0;
double* values;
double missing = 9999;
- int i = 0;
in = fopen(infile, "rb");
if (!in) {
@@ -52,6 +52,7 @@ int main(int argc, char** argv)
h = codes_handle_new_from_file(0, in, PRODUCT_GRIB, &err);
if (h == NULL) {
fprintf(stderr, "Error: unable to create handle from file %s\n", infile);
+ return 1;
}
CODES_CHECK(codes_set_double(h, "missingValue", missing), 0);
@@ -64,14 +65,25 @@ int main(int argc, char** argv)
/* get data values*/
CODES_CHECK(codes_get_double_array(h, "values", values, &values_len), 0);
+ /* enable bitmap */
CODES_CHECK(codes_set_long(h, "bitmapPresent", 1), 0);
- for (i = 0; i < 10; i++) {
+ /* set some values to be missing */
+ for (i = 0; i < NUM_MISSING; i++) {
values[i] = missing;
}
+ /* set the values (the bitmap will be automatically built) */
CODES_CHECK(codes_set_double_array(h, "values", values, values_len), 0);
+ /* Sanity checks */
+ CODES_CHECK(codes_get_long(h, "numberOfDataPoints", &num_of_data_points), 0);
+ CODES_CHECK(codes_get_long(h, "numberOfCodedValues", &num_of_coded_values), 0);
+ CODES_CHECK(codes_get_long(h, "numberOfMissing", &num_of_missing), 0);
+ assert(num_of_data_points == values_len);
+ assert(num_of_coded_values == num_of_data_points - num_of_missing);
+ assert(num_of_missing == NUM_MISSING);
+
/* get the coded message in a buffer */
CODES_CHECK(codes_get_message(h, &buffer, &size), 0);
