-int GifSize(FILE *, long *, long *);
-int PngSize(FILE *, long *, long *);
-int PngSize(FILE *, long *, long *);
-
-#include <gd.h>
-void gdImagePng(gdImagePtr im, FILE *out);
-
-int rrd_create_fn(char *file_name, rrd_t *rrd);
-int rrd_fetch_fn(char *filename, enum cf_en cf_idx,
- time_t *start,time_t *end,
- unsigned long *step,
- unsigned long *ds_cnt,
- char ***ds_namv,
- rrd_value_t **data);
-
-void rrd_free(rrd_t *rrd);
-void rrd_init(rrd_t *rrd);