| 1 | /* Hash routine. |
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| 2 | Copyright (C) 1998 Kunihiro Ishiguro |
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| 3 | |
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| 4 | This file is part of GNU Zebra. |
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| 5 | |
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| 6 | GNU Zebra 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 |
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| 8 | by the Free Software Foundation; either version 2, or (at your |
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| 9 | option) any later version. |
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| 10 | |
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| 11 | GNU Zebra is distributed in the hope that it will be useful, but |
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| 12 | WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | 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 GNU Zebra; see the file COPYING. If not, write to the |
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| 18 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, |
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| 19 | Boston, MA 02111-1307, USA. */ |
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| 20 | |
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| 21 | #ifndef _ZEBRA_HASH_H |
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| 22 | #define _ZEBRA_HASH_H |
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| 23 | |
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| 24 | /* Default hash table size. */ |
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| 25 | #define HASHTABSIZE 1024 |
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| 26 | |
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| 27 | struct hash_backet |
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| 28 | { |
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| 29 | /* Linked list. */ |
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| 30 | struct hash_backet *next; |
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| 31 | |
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| 32 | /* Hash key. */ |
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| 33 | unsigned int key; |
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| 34 | |
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| 35 | /* Data. */ |
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| 36 | void *data; |
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| 37 | }; |
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| 38 | |
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| 39 | struct hash |
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| 40 | { |
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| 41 | /* Hash backet. */ |
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| 42 | struct hash_backet **index; |
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| 43 | |
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| 44 | /* Hash table size. */ |
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| 45 | unsigned int size; |
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| 46 | |
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| 47 | /* Key make function. */ |
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| 48 | unsigned int (*hash_key) (void *); |
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| 49 | |
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| 50 | /* Data compare function. */ |
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| 51 | int (*hash_cmp) (const void *, const void *); |
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| 52 | |
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| 53 | /* Backet alloc. */ |
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| 54 | unsigned long count; |
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| 55 | }; |
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| 56 | |
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| 57 | extern struct hash *hash_create (unsigned int (*) (void *), |
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| 58 | int (*) (const void *, const void *)); |
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| 59 | extern struct hash *hash_create_size (unsigned int, unsigned int (*) (void *), |
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| 60 | int (*) (const void *, const void *)); |
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| 61 | |
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| 62 | extern void *hash_get (struct hash *, void *, void * (*) (void *)); |
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| 63 | extern void *hash_alloc_intern (void *); |
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| 64 | extern void *hash_lookup (struct hash *, void *); |
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| 65 | extern void *hash_release (struct hash *, void *); |
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| 66 | |
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| 67 | extern void hash_iterate (struct hash *, |
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| 68 | void (*) (struct hash_backet *, void *), void *); |
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| 69 | |
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| 70 | extern void hash_clean (struct hash *, void (*) (void *)); |
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| 71 | extern void hash_free (struct hash *); |
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| 72 | |
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| 73 | #endif /* _ZEBRA_HASH_H */ |
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