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/*
* This file is part of the sn package.
* Distribution of sn is covered by the GNU GPL. See file COPYING.
* Copyright 1998-2000 Harold Tay.
* Copyright 2000- Patrik Rdman.
*/
#ifndef KEY_H
#define KEY_H
/*
* Generic hash table lookup. Store only keys, not data. All keys
* must be unique. Cannot delete. This is used in 2 places: to
* store a list of subscribed newsgroups in snntpd; and to remember
* seen message IDs in snfetch.
*/
extern char *key_exists (char *key, int len);
extern int key_add (char **keyp, int len);
extern void key_free (void);
struct key {
struct key *next;
int len;
};
#define KEY(kp) ((char *)(kp) + sizeof(struct key))
#define KEY_TABLE_SIZE 128
extern struct key *key_table[KEY_TABLE_SIZE];
extern int nr_keys;
#define for_each_key(i,n,kp) \
for (n = nr_keys, i = 0; i < KEY_TABLE_SIZE && n > 0; i++) \
for (kp = key_table[i]; kp; kp = kp->next, n--)
#endif
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