/usr/include/omapip/hash.h is in isc-dhcp-dev 4.2.4-7ubuntu12.12.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 | /* hash.h
Definitions for hashing... */
/*
* Copyright (c) 2004,2009 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>
* https://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
* ``https://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
#if !defined (DEFAULT_HASH_SIZE)
# define DEFAULT_HASH_SIZE 9973
#endif
#if !defined (KEY_HASH_SIZE)
# define KEY_HASH_SIZE 1009
#endif
/* The purpose of the hashed_object_t struct is to not match anything else. */
typedef struct {
int foo;
} hashed_object_t;
typedef isc_result_t (*hash_foreach_func)(const void *, unsigned, void *);
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 *, size_t);
struct hash_table {
unsigned hash_count;
hash_reference referencer;
hash_dereference dereferencer;
hash_comparator_t cmp;
unsigned (*do_hash)(const void *, unsigned, unsigned);
/* This must remain the last entry in this table. */
struct hash_bucket *buckets [1];
};
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); \
unsigned char * name##_hash_report(hashtype *); \
int name##_hash_foreach (hashtype *, hash_foreach_func); \
int name##_new_hash (hashtype **, unsigned, const char *, int); \
void name##_free_hash_table (hashtype **, const char *, int);
#define HASH_FUNCTIONS(name, bufarg, type, hashtype, ref, deref, hasher) \
void name##_hash_add (hashtype *table, \
bufarg buf, unsigned len, type *ptr, \
const char *file, int line) \
{ \
add_hash ((struct hash_table *)table, 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, 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, \
buf, len, file, line); \
} \
\
unsigned char * name##_hash_report(hashtype *table) \
{ \
return hash_report((struct hash_table *)table); \
} \
\
int name##_hash_foreach (hashtype *table, hash_foreach_func func) \
{ \
return hash_foreach ((struct hash_table *)table, \
func); \
} \
\
int name##_new_hash (hashtype **tp, unsigned c, const char *file, int line) \
{ \
return new_hash ((struct hash_table **)tp, \
(hash_reference)ref, (hash_dereference)deref, c, \
hasher, 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 **, unsigned, 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, unsigned,
unsigned (*do_hash)(const void *, unsigned, unsigned),
const char *, int);
unsigned do_string_hash(const void *, unsigned, unsigned);
unsigned do_case_hash(const void *, unsigned, unsigned);
unsigned do_id_hash(const void *, unsigned, unsigned);
unsigned do_number_hash(const void *, unsigned, unsigned);
unsigned do_ip4_hash(const void *, unsigned, unsigned);
unsigned char *hash_report(struct hash_table *);
void add_hash (struct hash_table *,
const void *, unsigned, hashed_object_t *,
const char *, int);
void delete_hash_entry (struct hash_table *, const void *,
unsigned, const char *, int);
int hash_lookup (hashed_object_t **, struct hash_table *,
const void *, unsigned, const char *, int);
int hash_foreach (struct hash_table *, hash_foreach_func);
int casecmp (const void *s, const void *t, size_t len);
#endif /* OMAPI_HASH_H */
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