| 1 | /* hash.h -- header file for gas hash table routines
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| 2 | Copyright 1987, 1992, 1993, 1995, 1999 Free Software Foundation, Inc.
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| 3 |
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| 4 | This file is part of GAS, the GNU Assembler.
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| 5 |
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| 6 | GAS is free software; you can redistribute it and/or modify
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| 7 | it under the terms of the GNU General Public License as published by
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| 8 | the Free Software Foundation; either version 2, or (at your option)
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| 9 | any later version.
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| 10 |
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| 11 | GAS is distributed in the hope that it will be useful,
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| 12 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | GNU General Public License for more details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License
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| 17 | along with GAS; see the file COPYING. If not, write to the Free
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| 18 | Software Foundation, 59 Temple Place - Suite 330, Boston, MA
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| 19 | 02111-1307, USA. */
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| 20 |
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| 21 | #ifndef HASH_H
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| 22 | #define HASH_H
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| 23 |
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| 24 | struct hash_control;
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| 25 |
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| 26 | /* Create a hash table. This return a control block. */
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| 27 |
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| 28 | extern struct hash_control *hash_new PARAMS ((void));
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| 29 |
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| 30 | /* Delete a hash table, freeing all allocated memory. */
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| 31 |
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| 32 | extern void hash_die PARAMS ((struct hash_control *));
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| 33 |
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| 34 | /* Insert an entry into a hash table. This returns NULL on success.
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| 35 | On error, it returns a printable string indicating the error. It
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| 36 | is considered to be an error if the entry already exists in the
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| 37 | hash table. */
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| 38 |
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| 39 | extern const char *hash_insert PARAMS ((struct hash_control *,
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| 40 | const char *key, PTR value));
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| 41 |
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| 42 | /* Insert or replace an entry in a hash table. This returns NULL on
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| 43 | success. On error, it returns a printable string indicating the
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| 44 | error. If an entry already exists, its value is replaced. */
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| 45 |
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| 46 | extern const char *hash_jam PARAMS ((struct hash_control *,
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| 47 | const char *key, PTR value));
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| 48 |
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| 49 | /* Replace an existing entry in a hash table. This returns the old
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| 50 | value stored for the entry. If the entry is not found in the hash
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| 51 | table, this does nothing and returns NULL. */
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| 52 |
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| 53 | extern PTR hash_replace PARAMS ((struct hash_control *, const char *key,
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| 54 | PTR value));
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| 55 |
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| 56 | /* Find an entry in a hash table, returning its value. Returns NULL
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| 57 | if the entry is not found. */
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| 58 |
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| 59 | extern PTR hash_find PARAMS ((struct hash_control *, const char *key));
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| 60 |
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| 61 | /* Delete an entry from a hash table. This returns the value stored
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| 62 | for that entry, or NULL if there is no such entry. */
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| 63 |
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| 64 | extern PTR hash_delete PARAMS ((struct hash_control *, const char *key));
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| 65 |
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| 66 | /* Traverse a hash table. Call the function on every entry in the
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| 67 | hash table. */
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| 68 |
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| 69 | extern void hash_traverse PARAMS ((struct hash_control *,
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| 70 | void (*pfn) (const char *key, PTR value)));
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| 71 |
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| 72 | /* Print hash table statistics on the specified file. NAME is the
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| 73 | name of the hash table, used for printing a header. */
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| 74 |
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| 75 | extern void hash_print_statistics PARAMS ((FILE *, const char *name,
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| 76 | struct hash_control *));
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| 77 |
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| 78 | #endif /* HASH_H */
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