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#include <stdio.h>
#include "grib_api.h"
void usage(char *app) {
fprintf(stderr,"Usage is: %s input_file ouput_file \n",app);
}
int main(int argc, char *argv[]) {
FILE *in = NULL;
FILE *out = NULL;
grib_handle *source_handle = NULL;
grib_handle *clone_handle = NULL;
const void *buffer = NULL;
size_t size = 0;
int err = 0;
/* check number of arguments */
if (argc != 3) {
usage(argv[0]);
return 1;
}
in = fopen(argv[1],"r");
out = fopen(argv[2],"w");
if (!in || !out) {
perror("ERROR: unable to open input files");
return 1;
}
/* loop over the messages in the source grib and clone them */
while ((source_handle = grib_handle_new_from_file(0,in,&err))!=NULL) {
clone_handle = grib_handle_clone(source_handle);
if (clone_handle == NULL) {
perror("ERROR: coult not clone field");
return 1;
}
/* get the coded message in a buffer */
GRIB_CHECK(grib_get_message(clone_handle,&buffer,&size),0);
/* write the buffer to a file */
if(fwrite(buffer,1,size,out) != size)
{
perror(argv[1]);
return 1;
}
}
grib_handle_delete(source_handle);
grib_handle_delete(clone_handle);
fclose(out);
fclose(in);
return 0;
}
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