#ifndef GROUP_H
#define GROUP_H
-
#include <data/value.h>
-
/* Statistics for grouped data */
struct group_statistics
{
/* min and max values */
double minimum ;
double maximum ;
-
-
};
-
+struct variable ;
/* These funcs are useful for hash tables */
/* Return -1 if the id of a is less than b; +1 if greater than and
0 if equal */
-int compare_group(const struct group_statistics *a,
- const struct group_statistics *b,
- int width);
+int compare_group (const void *a,
+ const void *b,
+ const void *var);
-unsigned hash_group(const struct group_statistics *g, int width);
+unsigned int hash_group (const void *g, const void *var);
-void free_group(struct group_statistics *v, void *aux);
+void free_group (struct group_statistics *v, void *aux);