-# include <stdio.h>
-# include <stdlib.h>
-# include <assert.h>
-
-# ifdef USE_OBSTACK
-# include "obstack.h"
-# endif
-# include "xalloc.h"
-
-# define obstack_chunk_alloc xmalloc
-# define obstack_chunk_free free
-
-struct hash_ent
- {
- void *key;
- struct hash_ent *next;
- };
-typedef struct hash_ent HASH_ENT;
-
-/* This is particularly useful to cast uses in hash_initialize of the
- system free function. */
-typedef void (*Hash_key_freer_type) (void *key);
-
-struct HT
- {
- /* User-supplied function for freeing keys. It is specified in
- hash_initialize. If non-null, it is used by hash_free,
- hash_clear, and hash_rehash. You should specify `free' here
- only if you want these functions to free all of your `key'
- data. This is typically the case when your key is simply
- an auxilliary struct that you have malloc'd to aggregate
- several values. */
- Hash_key_freer_type hash_key_freer;
-
- /* User-supplied hash function that hashes entry E to an integer
- in the range 0..TABLE_SIZE-1. */
- unsigned int (*hash_hash) (const void *e, unsigned int table_size);
-
- /* User-supplied function that determines whether a new entry is
- unique by comparing the new entry to entries that hashed to the
- same bucket index. It should return zero for a pair of entries
- that compare equal, non-zero otherwise. */
-
- int (*hash_key_comparator) (const void *, const void *);
-
- HASH_ENT **hash_table;
- unsigned int hash_table_size;
- unsigned int hash_n_slots_used;
- unsigned int hash_max_chain_length;
-
- /* Gets set when an entry is deleted from a chain of length
- hash_max_chain_length. Indicates that hash_max_chain_length
- may no longer be valid. */
- unsigned int hash_dirty_max_chain_length;
-
- /* Sum of lengths of all chains (not counting any dummy
- header entries). */
- unsigned int hash_n_keys;
-
- /* A linked list of freed HASH_ENT structs.
- FIXME: Perhaps this is unnecessary and we should simply free
- and reallocate such structs. */
- HASH_ENT *hash_free_entry_list;
-
- /* FIXME: comment. */
-# ifdef USE_OBSTACK
- struct obstack ht_obstack;
-# endif
- };
-
-typedef struct HT HT;
-
-unsigned int
- hash_get_n_slots_used (const HT *ht);
-
-unsigned int
- hash_get_max_chain_length (HT *ht);
-
-int
- hash_rehash (HT *ht, unsigned int new_table_size);
-
-unsigned int
- hash_get_table_size (const HT *ht);