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quagga

    1: /* Hash routine.
    2:    Copyright (C) 1998 Kunihiro Ishiguro
    3: 
    4: This file is part of GNU Zebra.
    5: 
    6: GNU Zebra is free software; you can redistribute it and/or modify
    7: it under the terms of the GNU General Public License as published
    8: by the Free Software Foundation; either version 2, or (at your
    9: option) any later version.
   10: 
   11: GNU Zebra is distributed in the hope that it will be useful, but
   12: WITHOUT ANY WARRANTY; without even the implied warranty of
   13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   14: General Public License for more details.
   15: 
   16: You should have received a copy of the GNU General Public License
   17: along with GNU Zebra; see the file COPYING.  If not, write to the
   18: Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   19: Boston, MA 02111-1307, USA.  */
   20: 
   21: #ifndef _ZEBRA_HASH_H
   22: #define _ZEBRA_HASH_H
   23: 
   24: /* Default hash table size.  */ 
   25: #define HASHTABSIZE     1024
   26: 
   27: struct hash_backet
   28: {
   29:   /* Linked list.  */
   30:   struct hash_backet *next;
   31: 
   32:   /* Hash key. */
   33:   unsigned int key;
   34: 
   35:   /* Data.  */
   36:   void *data;
   37: };
   38: 
   39: struct hash
   40: {
   41:   /* Hash backet. */
   42:   struct hash_backet **index;
   43: 
   44:   /* Hash table size. */
   45:   unsigned int size;
   46: 
   47:   /* Key make function. */
   48:   unsigned int (*hash_key) (void *);
   49: 
   50:   /* Data compare function. */
   51:   int (*hash_cmp) (const void *, const void *);
   52: 
   53:   /* Backet alloc. */
   54:   unsigned long count;
   55: };
   56: 
   57: extern struct hash *hash_create (unsigned int (*) (void *), 
   58: 				 int (*) (const void *, const void *));
   59: extern struct hash *hash_create_size (unsigned int, unsigned int (*) (void *), 
   60:                                              int (*) (const void *, const void *));
   61: 
   62: extern void *hash_get (struct hash *, void *, void * (*) (void *));
   63: extern void *hash_alloc_intern (void *);
   64: extern void *hash_lookup (struct hash *, void *);
   65: extern void *hash_release (struct hash *, void *);
   66: 
   67: extern void hash_iterate (struct hash *, 
   68: 		   void (*) (struct hash_backet *, void *), void *);
   69: 
   70: extern void hash_clean (struct hash *, void (*) (void *));
   71: extern void hash_free (struct hash *);
   72: 
   73: extern unsigned int string_hash_make (const char *);
   74: 
   75: #endif /* _ZEBRA_HASH_H */