151 lines
5.5 KiB
C
151 lines
5.5 KiB
C
/* hash.h
|
|
|
|
Definitions for hashing... */
|
|
|
|
/*
|
|
* Copyright (c) 2004 by Internet Systems Consortium, Inc. ("ISC")
|
|
* Copyright (c) 1995-2003 by Internet Software Consortium
|
|
*
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|
* copyright notice and this permission notice appear in all copies.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
|
|
* OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|
*
|
|
* Internet Systems Consortium, Inc.
|
|
* 950 Charter Street
|
|
* Redwood City, CA 94063
|
|
* <info@isc.org>
|
|
* http://www.isc.org/
|
|
*
|
|
* This software has been written for Internet Systems Consortium
|
|
* by Ted Lemon in cooperation with Vixie Enterprises and Nominum, Inc.
|
|
* To learn more about Internet Systems Consortium, see
|
|
* ``http://www.isc.org/''. To learn more about Vixie Enterprises,
|
|
* see ``http://www.vix.com''. To learn more about Nominum, Inc., see
|
|
* ``http://www.nominum.com''.
|
|
*/
|
|
|
|
#ifndef OMAPI_HASH_H
|
|
#define OMAPI_HASH_H
|
|
|
|
#define DEFAULT_HASH_SIZE 9973
|
|
|
|
/* The purpose of the hashed_object_t struct is to not match anything else. */
|
|
typedef struct {
|
|
int foo;
|
|
} hashed_object_t;
|
|
|
|
typedef void (*hash_foreach_func) (const unsigned char *,
|
|
unsigned, hashed_object_t *);
|
|
typedef int (*hash_reference) (hashed_object_t **, hashed_object_t *,
|
|
const char *, int);
|
|
typedef int (*hash_dereference) (hashed_object_t **, const char *, int);
|
|
|
|
struct hash_bucket {
|
|
struct hash_bucket *next;
|
|
const unsigned char *name;
|
|
unsigned len;
|
|
hashed_object_t *value;
|
|
};
|
|
|
|
typedef int (*hash_comparator_t)(const void *, const void *, unsigned long);
|
|
|
|
struct hash_table {
|
|
unsigned hash_count;
|
|
struct hash_bucket *buckets [DEFAULT_HASH_SIZE];
|
|
hash_reference referencer;
|
|
hash_dereference dereferencer;
|
|
hash_comparator_t cmp;
|
|
int (*do_hash) (const unsigned char *, unsigned, unsigned);
|
|
};
|
|
|
|
struct named_hash {
|
|
struct named_hash *next;
|
|
const char *name;
|
|
struct hash_table *hash;
|
|
};
|
|
|
|
#define HASH_FUNCTIONS_DECL(name, bufarg, type, hashtype) \
|
|
void name##_hash_add (hashtype *, bufarg, unsigned, type *, \
|
|
const char *, int); \
|
|
void name##_hash_delete (hashtype *, bufarg, unsigned, \
|
|
const char *, int); \
|
|
int name##_hash_lookup (type **, hashtype *, bufarg, unsigned, \
|
|
const char *, int); \
|
|
int name##_hash_foreach (hashtype *, \
|
|
void (*) (bufarg, unsigned, type *)); \
|
|
int name##_new_hash (hashtype **, int, const char *, int); \
|
|
void name##_free_hash_table (hashtype **, const char *, int);
|
|
|
|
|
|
#define HASH_FUNCTIONS(name, bufarg, type, hashtype, ref, deref) \
|
|
void name##_hash_add (hashtype *table, \
|
|
bufarg buf, unsigned len, type *ptr, \
|
|
const char *file, int line) \
|
|
{ \
|
|
add_hash ((struct hash_table *)table, \
|
|
(const unsigned char *)buf, \
|
|
len, (hashed_object_t *)ptr, file, line); \
|
|
} \
|
|
\
|
|
void name##_hash_delete (hashtype *table, \
|
|
bufarg buf, unsigned len, const char *file, int line)\
|
|
{ \
|
|
delete_hash_entry ((struct hash_table *)table, \
|
|
(const unsigned char *)buf, \
|
|
len, file, line); \
|
|
} \
|
|
\
|
|
int name##_hash_lookup (type **ptr, hashtype *table, \
|
|
bufarg buf, unsigned len, const char *file, int line) \
|
|
{ \
|
|
return hash_lookup ((hashed_object_t **)ptr, \
|
|
(struct hash_table *)table, \
|
|
(const unsigned char *)buf, len, file, line); \
|
|
} \
|
|
\
|
|
int name##_hash_foreach (hashtype *table, \
|
|
void (*func) (bufarg, unsigned, type *)) \
|
|
{ \
|
|
return hash_foreach ((struct hash_table *)table, \
|
|
(hash_foreach_func)func); \
|
|
} \
|
|
\
|
|
int name##_new_hash (hashtype **tp, int c, const char *file, int line) \
|
|
{ \
|
|
return new_hash ((struct hash_table **)tp, \
|
|
(hash_reference)ref, (hash_dereference)deref, c, \
|
|
file, line); \
|
|
} \
|
|
\
|
|
void name##_free_hash_table (hashtype **table, const char *file, int line) \
|
|
{ \
|
|
free_hash_table ((struct hash_table **)table, file, line); \
|
|
}
|
|
|
|
void relinquish_hash_bucket_hunks (void);
|
|
int new_hash_table (struct hash_table **, int, const char *, int);
|
|
void free_hash_table (struct hash_table **, const char *, int);
|
|
struct hash_bucket *new_hash_bucket (const char *, int);
|
|
void free_hash_bucket (struct hash_bucket *, const char *, int);
|
|
int new_hash (struct hash_table **,
|
|
hash_reference, hash_dereference, int, const char *, int);
|
|
void add_hash (struct hash_table *,
|
|
const unsigned char *, unsigned, hashed_object_t *,
|
|
const char *, int);
|
|
void delete_hash_entry (struct hash_table *, const unsigned char *,
|
|
unsigned, const char *, int);
|
|
int hash_lookup (hashed_object_t **, struct hash_table *,
|
|
const unsigned char *, unsigned, const char *, int);
|
|
int hash_foreach (struct hash_table *, hash_foreach_func);
|
|
int casecmp (const void *s, const void *t, unsigned long len);
|
|
|
|
#endif /* OMAPI_HASH_H */
|