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/* hash.h -- header file for gas hash table routines
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Copyright 1987, 1992, 1993, 1995, 1999, 2003, 2005, 2007, 2008
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Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3, or (at your option)
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any later version.
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GAS is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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#ifndef HASH_H
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#define HASH_H
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struct hash_control;
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/* Set the size of the hash table used. */
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void set_gas_hash_table_size (unsigned long);
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/* Create a hash table. This return a control block. */
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extern struct hash_control *hash_new (void);
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/* Delete a hash table, freeing all allocated memory. */
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extern void hash_die (struct hash_control *);
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/* Insert an entry into a hash table. This returns NULL on success.
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On error, it returns a printable string indicating the error. It
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is considered to be an error if the entry already exists in the
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hash table. */
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extern const char *hash_insert (struct hash_control *,
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const char *key, void *value);
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/* Insert or replace an entry in a hash table. This returns NULL on
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success. On error, it returns a printable string indicating the
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error. If an entry already exists, its value is replaced. */
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extern const char *hash_jam (struct hash_control *,
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const char *key, void *value);
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/* Replace an existing entry in a hash table. This returns the old
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value stored for the entry. If the entry is not found in the hash
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table, this does nothing and returns NULL. */
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extern void *hash_replace (struct hash_control *, const char *key,
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void *value);
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/* Find an entry in a hash table, returning its value. Returns NULL
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if the entry is not found. */
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extern void *hash_find (struct hash_control *, const char *key);
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/* As hash_find, but KEY is of length LEN and is not guaranteed to be
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NUL-terminated. */
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extern void *hash_find_n (struct hash_control *, const char *key, size_t len);
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/* Delete an entry from a hash table. This returns the value stored
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for that entry, or NULL if there is no such entry. */
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extern void *hash_delete (struct hash_control *, const char *key, int);
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/* Traverse a hash table. Call the function on every entry in the
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hash table. */
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extern void hash_traverse (struct hash_control *,
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void (*pfn) (const char *key, void *value));
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/* Print hash table statistics on the specified file. NAME is the
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name of the hash table, used for printing a header. */
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extern void hash_print_statistics (FILE *, const char *name,
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struct hash_control *);
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#endif /* HASH_H */
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