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/* hash.h -- header file for gas hash table routines
Copyright 1987, 1992, 1993, 1995, 1999 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
GAS is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GAS is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
Software Foundation, 59 Temple Place - Suite 330, Boston, MA
02111-1307, USA. */
#ifndef HASH_H
#define HASH_H
struct hash_control;
/* Create a hash table. This return a control block. */
extern struct hash_control *hash_new (void);
/* Delete a hash table, freeing all allocated memory. */
extern void hash_die (struct hash_control *);
/* Insert an entry into a hash table. This returns NULL on success.
On error, it returns a printable string indicating the error. It
is considered to be an error if the entry already exists in the
hash table. */
extern const char *hash_insert (struct hash_control *,
const char *key, PTR value);
/* Insert or replace an entry in a hash table. This returns NULL on
success. On error, it returns a printable string indicating the
error. If an entry already exists, its value is replaced. */
extern const char *hash_jam (struct hash_control *,
const char *key, PTR value);
/* Replace an existing entry in a hash table. This returns the old
value stored for the entry. If the entry is not found in the hash
table, this does nothing and returns NULL. */
extern PTR hash_replace (struct hash_control *, const char *key,
PTR value);
/* Find an entry in a hash table, returning its value. Returns NULL
if the entry is not found. */
extern PTR hash_find (struct hash_control *, const char *key);
/* Delete an entry from a hash table. This returns the value stored
for that entry, or NULL if there is no such entry. */
extern PTR hash_delete (struct hash_control *, const char *key);
/* Traverse a hash table. Call the function on every entry in the
hash table. */
extern void hash_traverse (struct hash_control *,
void (*pfn) (const char *key, PTR value));
/* Print hash table statistics on the specified file. NAME is the
name of the hash table, used for printing a header. */
extern void hash_print_statistics (FILE *, const char *name,
struct hash_control *);
#endif /* HASH_H */
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