mirror of https://github.com/ecmwf/eccodes.git
94 lines
1.9 KiB
C
94 lines
1.9 KiB
C
|
/*
|
||
|
|
* C Implementation: keys_iterator
|
||
|
|
*
|
||
|
|
* Description:
|
||
|
|
* Example on how to use keys_iterator functions and the
|
||
|
|
* grib_keys_iterator structure to get all the available
|
||
|
|
* keys in a message.
|
||
|
|
*
|
||
|
|
*
|
||
|
|
*
|
||
|
|
* Author: Enrico Fucile <enrico.fucile@ecmwf.int>, (C) 2006
|
||
|
|
*
|
||
|
|
* Copyright: See COPYING file that comes with this distribution
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include <assert.h>
|
||
|
|
#include <stdlib.h>
|
||
|
|
#include <stdio.h>
|
||
|
|
#include <unistd.h>
|
||
|
|
|
||
|
|
#include "grib_api.h"
|
||
|
|
|
||
|
|
#define MAX_KEY_LEN 255
|
||
|
|
#define MAX_VAL_LEN 1024
|
||
|
|
|
||
|
|
static void usage(char* progname);
|
||
|
|
|
||
|
|
int main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
/* filter out keys from the key_iterator with
|
||
|
|
* key_iterator_filter_flags -> GRIB_NO_READ_ONLY_KEYS, GRIB_NO_OPTIONAL_KEYS
|
||
|
|
* set it to 0 if you want all keys
|
||
|
|
*/
|
||
|
|
/* unsigned long key_iterator_filter_flags=GRIB_KEYS_ITERATOR_SKIP_READ_ONLY || GRIB_KEYS_ITERATOR_SKIP_OPTIONAL; */
|
||
|
|
unsigned long key_iterator_filter_flags=GRIB_KEYS_ITERATOR_ALL_KEYS;
|
||
|
|
|
||
|
|
/* char* namespace=0; */
|
||
|
|
char* namespace="mars";
|
||
|
|
|
||
|
|
FILE* f;
|
||
|
|
grib_handle* h=NULL;
|
||
|
|
grib_keys_iterator* kiter=NULL;
|
||
|
|
int err=0;
|
||
|
|
int grib_count=0;
|
||
|
|
|
||
|
|
char value[MAX_VAL_LEN];
|
||
|
|
size_t vlen=MAX_VAL_LEN;
|
||
|
|
|
||
|
|
if (argc != 2) usage(argv[0]);
|
||
|
|
|
||
|
|
f = fopen(argv[1],"r");
|
||
|
|
if(!f) {
|
||
|
|
perror(argv[1]);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
while((h = grib_handle_new_from_file(0,f,&err)) != NULL) {
|
||
|
|
|
||
|
|
grib_count++;
|
||
|
|
printf("-- GRIB N. %d --\n",grib_count);
|
||
|
|
if(!h) {
|
||
|
|
printf("ERROR: Unable to create grib handle\n");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
kiter=grib_keys_iterator_new(h,key_iterator_filter_flags,namespace);
|
||
|
|
if (!kiter) {
|
||
|
|
printf("ERROR: Unable to create keys iterator\n");
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|
||
|
|
while(grib_keys_iterator_next(kiter))
|
||
|
|
{
|
||
|
|
const char* name = grib_keys_iterator_get_name(kiter);
|
||
|
|
vlen=MAX_VAL_LEN;
|
||
|
|
GRIB_CHECK(grib_keys_iterator_get_string(kiter,value,&vlen),name);
|
||
|
|
printf("%s = %s\n",name,value);
|
||
|
|
}
|
||
|
|
|
||
|
|
grib_keys_iterator_delete(kiter);
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
|
||
|
|
}
|
||
|
|
|
||
|
|
static void usage(char* progname) {
|
||
|
|
printf("\nUsage: %s grib_file\n",progname);
|
||
|
|
exit(1);
|
||
|
|
}
|
||
|
|
|