| | 1 | /* hash.h -- header file for gas hash table routines |
| | 2 | Copyright 1987, 1992, 1993, 1995, 1999, 2003, 2005, 2007, 2008 |
| | 3 | Free Software Foundation, Inc. |
| | 4 | |
| | 5 | This file is part of GAS, the GNU Assembler. |
| | 6 | |
| | 7 | GAS is free software; you can redistribute it and/or modify |
| | 8 | it under the terms of the GNU General Public License as published by |
| | 9 | the Free Software Foundation; either version 3, or (at your option) |
| | 10 | any later version. |
| | 11 | |
| | 12 | GAS is distributed in the hope that it will be useful, |
| | 13 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | 14 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| | 15 | GNU General Public License for more details. |
| | 16 | |
| | 17 | You should have received a copy of the GNU General Public License |
| | 18 | along with GAS; see the file COPYING. If not, write to the Free |
| | 19 | Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA |
| | 20 | 02110-1301, USA. */ |
| | 21 | |
| | 22 | #ifndef HASH_H |
| | 23 | #define HASH_H |
| | 24 | |
| | 25 | struct hash_control; |
| | 26 | |
| | 27 | /* Set the size of the hash table used. */ |
| | 28 | |
| | 29 | void set_gas_hash_table_size (unsigned long); |
| | 30 | |
| | 31 | /* Create a hash table. This return a control block. */ |
| | 32 | |
| | 33 | extern struct hash_control *hash_new (void); |
| | 34 | |
| | 35 | /* Delete a hash table, freeing all allocated memory. */ |
| | 36 | |
| | 37 | extern void hash_die (struct hash_control *); |
| | 38 | |
| | 39 | /* Insert an entry into a hash table. This returns NULL on success. |
| | 40 | On error, it returns a printable string indicating the error. It |
| | 41 | is considered to be an error if the entry already exists in the |
| | 42 | hash table. */ |
| | 43 | |
| | 44 | extern const char *hash_insert (struct hash_control *, |
| | 45 | const char *key, void *value); |
| | 46 | |
| | 47 | /* Insert or replace an entry in a hash table. This returns NULL on |
| | 48 | success. On error, it returns a printable string indicating the |
| | 49 | error. If an entry already exists, its value is replaced. */ |
| | 50 | |
| | 51 | extern const char *hash_jam (struct hash_control *, |
| | 52 | const char *key, void *value); |
| | 53 | |
| | 54 | /* Replace an existing entry in a hash table. This returns the old |
| | 55 | value stored for the entry. If the entry is not found in the hash |
| | 56 | table, this does nothing and returns NULL. */ |
| | 57 | |
| | 58 | extern void *hash_replace (struct hash_control *, const char *key, |
| | 59 | void *value); |
| | 60 | |
| | 61 | /* Find an entry in a hash table, returning its value. Returns NULL |
| | 62 | if the entry is not found. */ |
| | 63 | |
| | 64 | extern void *hash_find (struct hash_control *, const char *key); |
| | 65 | |
| | 66 | /* As hash_find, but KEY is of length LEN and is not guaranteed to be |
| | 67 | NUL-terminated. */ |
| | 68 | |
| | 69 | extern void *hash_find_n (struct hash_control *, const char *key, size_t len); |
| | 70 | |
| | 71 | /* Delete an entry from a hash table. This returns the value stored |
| | 72 | for that entry, or NULL if there is no such entry. */ |
| | 73 | |
| | 74 | extern void *hash_delete (struct hash_control *, const char *key, int); |
| | 75 | |
| | 76 | /* Traverse a hash table. Call the function on every entry in the |
| | 77 | hash table. */ |
| | 78 | |
| | 79 | extern void hash_traverse (struct hash_control *, |
| | 80 | void (*pfn) (const char *key, void *value)); |
| | 81 | |
| | 82 | /* Print hash table statistics on the specified file. NAME is the |
| | 83 | name of the hash table, used for printing a header. */ |
| | 84 | |
| | 85 | extern void hash_print_statistics (FILE *, const char *name, |
| | 86 | struct hash_control *); |
| | 87 | |
| | 88 | #endif /* HASH_H */ |
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