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1/* crypto/lhash/lhash.h */
2/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
8 *
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 *
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 *
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
51 * SUCH DAMAGE.
52 *
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
57 */
58
59/* Header for dynamic hash table routines
60 * Author - Eric Young
61 */
62
63#ifndef HEADER_LHASH_H
64#define HEADER_LHASH_H
65
66#include <openssl/e_os2.h>
67#ifndef OPENSSL_NO_FP_API
68#include <stdio.h>
69#endif
70
71#ifndef OPENSSL_NO_BIO
72#include <openssl/bio.h>
73#endif
74
75#ifdef __cplusplus
76extern "C" {
77#endif
78
79typedef struct lhash_node_st
80 {
81 void *data;
82 struct lhash_node_st *next;
83#ifndef OPENSSL_NO_HASH_COMP
84 unsigned long hash;
85#endif
86 } LHASH_NODE;
87
88typedef int (*LHASH_COMP_FN_TYPE)(const void *, const void *);
89typedef unsigned long (*LHASH_HASH_FN_TYPE)(const void *);
90typedef void (*LHASH_DOALL_FN_TYPE)(void *);
91typedef void (*LHASH_DOALL_ARG_FN_TYPE)(void *, void *);
92
93/* Macros for declaring and implementing type-safe wrappers for LHASH callbacks.
94 * This way, callbacks can be provided to LHASH structures without function
95 * pointer casting and the macro-defined callbacks provide per-variable casting
96 * before deferring to the underlying type-specific callbacks. NB: It is
97 * possible to place a "static" in front of both the DECLARE and IMPLEMENT
98 * macros if the functions are strictly internal. */
99
100/* First: "hash" functions */
101#define DECLARE_LHASH_HASH_FN(name, o_type) \
102 unsigned long name##_LHASH_HASH(const void *);
103#define IMPLEMENT_LHASH_HASH_FN(name, o_type) \
104 unsigned long name##_LHASH_HASH(const void *arg) { \
105 const o_type *a = arg; \
106 return name##_hash(a); }
107#define LHASH_HASH_FN(name) name##_LHASH_HASH
108
109/* Second: "compare" functions */
110#define DECLARE_LHASH_COMP_FN(name, o_type) \
111 int name##_LHASH_COMP(const void *, const void *);
112#define IMPLEMENT_LHASH_COMP_FN(name, o_type) \
113 int name##_LHASH_COMP(const void *arg1, const void *arg2) { \
114 const o_type *a = arg1; \
115 const o_type *b = arg2; \
116 return name##_cmp(a,b); }
117#define LHASH_COMP_FN(name) name##_LHASH_COMP
118
119/* Third: "doall" functions */
120#define DECLARE_LHASH_DOALL_FN(name, o_type) \
121 void name##_LHASH_DOALL(void *);
122#define IMPLEMENT_LHASH_DOALL_FN(name, o_type) \
123 void name##_LHASH_DOALL(void *arg) { \
124 o_type *a = arg; \
125 name##_doall(a); }
126#define LHASH_DOALL_FN(name) name##_LHASH_DOALL
127
128/* Fourth: "doall_arg" functions */
129#define DECLARE_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
130 void name##_LHASH_DOALL_ARG(void *, void *);
131#define IMPLEMENT_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
132 void name##_LHASH_DOALL_ARG(void *arg1, void *arg2) { \
133 o_type *a = arg1; \
134 a_type *b = arg2; \
135 name##_doall_arg(a, b); }
136#define LHASH_DOALL_ARG_FN(name) name##_LHASH_DOALL_ARG
137
138typedef struct lhash_st
139 {
140 LHASH_NODE **b;
141 LHASH_COMP_FN_TYPE comp;
142 LHASH_HASH_FN_TYPE hash;
143 unsigned int num_nodes;
144 unsigned int num_alloc_nodes;
145 unsigned int p;
146 unsigned int pmax;
147 unsigned long up_load; /* load times 256 */
148 unsigned long down_load; /* load times 256 */
149 unsigned long num_items;
150
151 unsigned long num_expands;
152 unsigned long num_expand_reallocs;
153 unsigned long num_contracts;
154 unsigned long num_contract_reallocs;
155 unsigned long num_hash_calls;
156 unsigned long num_comp_calls;
157 unsigned long num_insert;
158 unsigned long num_replace;
159 unsigned long num_delete;
160 unsigned long num_no_delete;
161 unsigned long num_retrieve;
162 unsigned long num_retrieve_miss;
163 unsigned long num_hash_comps;
164
165 int error;
166 } _LHASH; /* Do not use _LHASH directly, use LHASH_OF
167 * and friends */
168
169#define LH_LOAD_MULT 256
170
171/* Indicates a malloc() error in the last call, this is only bad
172 * in lh_insert(). */
173#define lh_error(lh) ((lh)->error)
174
175_LHASH *lh_new(LHASH_HASH_FN_TYPE h, LHASH_COMP_FN_TYPE c);
176void lh_free(_LHASH *lh);
177void *lh_insert(_LHASH *lh, void *data);
178void *lh_delete(_LHASH *lh, const void *data);
179void *lh_retrieve(_LHASH *lh, const void *data);
180void lh_doall(_LHASH *lh, LHASH_DOALL_FN_TYPE func);
181void lh_doall_arg(_LHASH *lh, LHASH_DOALL_ARG_FN_TYPE func, void *arg);
182unsigned long lh_strhash(const char *c);
183unsigned long lh_num_items(const _LHASH *lh);
184
185#ifndef OPENSSL_NO_FP_API
186void lh_stats(const _LHASH *lh, FILE *out);
187void lh_node_stats(const _LHASH *lh, FILE *out);
188void lh_node_usage_stats(const _LHASH *lh, FILE *out);
189#endif
190
191#ifndef OPENSSL_NO_BIO
192void lh_stats_bio(const _LHASH *lh, BIO *out);
193void lh_node_stats_bio(const _LHASH *lh, BIO *out);
194void lh_node_usage_stats_bio(const _LHASH *lh, BIO *out);
195#endif
196
197/* Type checking... */
198
199#define LHASH_OF(type) struct lhash_st_##type
200
201#define DECLARE_LHASH_OF(type) LHASH_OF(type) { int dummy; }
202
203#define CHECKED_LHASH_OF(type,lh) \
204 ((_LHASH *)CHECKED_PTR_OF(LHASH_OF(type),lh))
205
206/* Define wrapper functions. */
207#define LHM_lh_new(type, name) \
208 ((LHASH_OF(type) *)lh_new(LHASH_HASH_FN(name), LHASH_COMP_FN(name)))
209#define LHM_lh_error(type, lh) \
210 lh_error(CHECKED_LHASH_OF(type,lh))
211#define LHM_lh_insert(type, lh, inst) \
212 ((type *)lh_insert(CHECKED_LHASH_OF(type, lh), \
213 CHECKED_PTR_OF(type, inst)))
214#define LHM_lh_retrieve(type, lh, inst) \
215 ((type *)lh_retrieve(CHECKED_LHASH_OF(type, lh), \
216 CHECKED_PTR_OF(type, inst)))
217#define LHM_lh_delete(type, lh, inst) \
218 ((type *)lh_delete(CHECKED_LHASH_OF(type, lh), \
219 CHECKED_PTR_OF(type, inst)))
220#define LHM_lh_doall(type, lh,fn) lh_doall(CHECKED_LHASH_OF(type, lh), fn)
221#define LHM_lh_doall_arg(type, lh, fn, arg_type, arg) \
222 lh_doall_arg(CHECKED_LHASH_OF(type, lh), fn, CHECKED_PTR_OF(arg_type, arg))
223#define LHM_lh_num_items(type, lh) lh_num_items(CHECKED_LHASH_OF(type, lh))
224#define LHM_lh_down_load(type, lh) (CHECKED_LHASH_OF(type, lh)->down_load)
225#define LHM_lh_node_stats_bio(type, lh, out) \
226 lh_node_stats_bio(CHECKED_LHASH_OF(type, lh), out)
227#define LHM_lh_node_usage_stats_bio(type, lh, out) \
228 lh_node_usage_stats_bio(CHECKED_LHASH_OF(type, lh), out)
229#define LHM_lh_stats_bio(type, lh, out) \
230 lh_stats_bio(CHECKED_LHASH_OF(type, lh), out)
231#define LHM_lh_free(type, lh) lh_free(CHECKED_LHASH_OF(type, lh))
232
233DECLARE_LHASH_OF(OPENSSL_STRING);
234DECLARE_LHASH_OF(OPENSSL_CSTRING);
235
236#ifdef __cplusplus
237}
238#endif
239
240#endif
241
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