236 lines
8.8 KiB
C
236 lines
8.8 KiB
C
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/* $OpenBSD: lhash.h,v 1.12 2014/06/12 15:49:29 deraadt Exp $ */
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/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
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* All rights reserved.
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*
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* This package is an SSL implementation written
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* by Eric Young (eay@cryptsoft.com).
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* The implementation was written so as to conform with Netscapes SSL.
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*
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* This library is free for commercial and non-commercial use as long as
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* the following conditions are aheared to. The following conditions
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* apply to all code found in this distribution, be it the RC4, RSA,
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* lhash, DES, etc., code; not just the SSL code. The SSL documentation
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* included with this distribution is covered by the same copyright terms
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* except that the holder is Tim Hudson (tjh@cryptsoft.com).
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*
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* Copyright remains Eric Young's, and as such any Copyright notices in
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* the code are not to be removed.
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* If this package is used in a product, Eric Young should be given attribution
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* as the author of the parts of the library used.
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* This can be in the form of a textual message at program startup or
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* in documentation (online or textual) provided with the package.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* "This product includes cryptographic software written by
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* Eric Young (eay@cryptsoft.com)"
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* The word 'cryptographic' can be left out if the rouines from the library
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* being used are not cryptographic related :-).
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* 4. If you include any Windows specific code (or a derivative thereof) from
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* the apps directory (application code) you must include an acknowledgement:
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* "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
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*
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* THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* The licence and distribution terms for any publically available version or
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* derivative of this code cannot be changed. i.e. this code cannot simply be
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* copied and put under another distribution licence
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* [including the GNU Public Licence.]
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*/
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/* Header for dynamic hash table routines
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* Author - Eric Young
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*/
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#ifndef HEADER_LHASH_H
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#define HEADER_LHASH_H
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#include <openssl/opensslconf.h>
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#include <stdio.h>
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#ifndef OPENSSL_NO_BIO
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#include <openssl/bio.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct lhash_node_st {
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void *data;
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struct lhash_node_st *next;
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#ifndef OPENSSL_NO_HASH_COMP
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unsigned long hash;
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#endif
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} LHASH_NODE;
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typedef int (*LHASH_COMP_FN_TYPE)(const void *, const void *);
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typedef unsigned long (*LHASH_HASH_FN_TYPE)(const void *);
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typedef void (*LHASH_DOALL_FN_TYPE)(void *);
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typedef void (*LHASH_DOALL_ARG_FN_TYPE)(void *, void *);
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/* Macros for declaring and implementing type-safe wrappers for LHASH callbacks.
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* This way, callbacks can be provided to LHASH structures without function
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* pointer casting and the macro-defined callbacks provide per-variable casting
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* before deferring to the underlying type-specific callbacks. NB: It is
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* possible to place a "static" in front of both the DECLARE and IMPLEMENT
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* macros if the functions are strictly internal. */
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/* First: "hash" functions */
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#define DECLARE_LHASH_HASH_FN(name, o_type) \
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unsigned long name##_LHASH_HASH(const void *);
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#define IMPLEMENT_LHASH_HASH_FN(name, o_type) \
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unsigned long name##_LHASH_HASH(const void *arg) { \
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const o_type *a = arg; \
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return name##_hash(a); }
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#define LHASH_HASH_FN(name) name##_LHASH_HASH
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/* Second: "compare" functions */
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#define DECLARE_LHASH_COMP_FN(name, o_type) \
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int name##_LHASH_COMP(const void *, const void *);
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#define IMPLEMENT_LHASH_COMP_FN(name, o_type) \
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int name##_LHASH_COMP(const void *arg1, const void *arg2) { \
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const o_type *a = arg1; \
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const o_type *b = arg2; \
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return name##_cmp(a,b); }
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#define LHASH_COMP_FN(name) name##_LHASH_COMP
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/* Third: "doall" functions */
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#define DECLARE_LHASH_DOALL_FN(name, o_type) \
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void name##_LHASH_DOALL(void *);
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#define IMPLEMENT_LHASH_DOALL_FN(name, o_type) \
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void name##_LHASH_DOALL(void *arg) { \
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o_type *a = arg; \
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name##_doall(a); }
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#define LHASH_DOALL_FN(name) name##_LHASH_DOALL
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/* Fourth: "doall_arg" functions */
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#define DECLARE_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
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void name##_LHASH_DOALL_ARG(void *, void *);
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#define IMPLEMENT_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
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void name##_LHASH_DOALL_ARG(void *arg1, void *arg2) { \
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o_type *a = arg1; \
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a_type *b = arg2; \
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name##_doall_arg(a, b); }
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#define LHASH_DOALL_ARG_FN(name) name##_LHASH_DOALL_ARG
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typedef struct lhash_st {
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LHASH_NODE **b;
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LHASH_COMP_FN_TYPE comp;
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LHASH_HASH_FN_TYPE hash;
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unsigned int num_nodes;
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unsigned int num_alloc_nodes;
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unsigned int p;
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unsigned int pmax;
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unsigned long up_load; /* load times 256 */
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unsigned long down_load; /* load times 256 */
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unsigned long num_items;
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unsigned long num_expands;
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unsigned long num_expand_reallocs;
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unsigned long num_contracts;
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unsigned long num_contract_reallocs;
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unsigned long num_hash_calls;
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unsigned long num_comp_calls;
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unsigned long num_insert;
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unsigned long num_replace;
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unsigned long num_delete;
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unsigned long num_no_delete;
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unsigned long num_retrieve;
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unsigned long num_retrieve_miss;
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unsigned long num_hash_comps;
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int error;
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} _LHASH; /* Do not use _LHASH directly, use LHASH_OF
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* and friends */
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#define LH_LOAD_MULT 256
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/* Indicates a malloc() error in the last call, this is only bad
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* in lh_insert(). */
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#define lh_error(lh) ((lh)->error)
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_LHASH *lh_new(LHASH_HASH_FN_TYPE h, LHASH_COMP_FN_TYPE c);
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void lh_free(_LHASH *lh);
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void *lh_insert(_LHASH *lh, void *data);
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void *lh_delete(_LHASH *lh, const void *data);
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void *lh_retrieve(_LHASH *lh, const void *data);
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void lh_doall(_LHASH *lh, LHASH_DOALL_FN_TYPE func);
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void lh_doall_arg(_LHASH *lh, LHASH_DOALL_ARG_FN_TYPE func, void *arg);
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unsigned long lh_strhash(const char *c);
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unsigned long lh_num_items(const _LHASH *lh);
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void lh_stats(const _LHASH *lh, FILE *out);
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void lh_node_stats(const _LHASH *lh, FILE *out);
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void lh_node_usage_stats(const _LHASH *lh, FILE *out);
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#ifndef OPENSSL_NO_BIO
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void lh_stats_bio(const _LHASH *lh, BIO *out);
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void lh_node_stats_bio(const _LHASH *lh, BIO *out);
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void lh_node_usage_stats_bio(const _LHASH *lh, BIO *out);
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#endif
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/* Type checking... */
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#define LHASH_OF(type) struct lhash_st_##type
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#define DECLARE_LHASH_OF(type) LHASH_OF(type) { int dummy; }
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#define CHECKED_LHASH_OF(type,lh) \
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((_LHASH *)CHECKED_PTR_OF(LHASH_OF(type),lh))
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/* Define wrapper functions. */
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#define LHM_lh_new(type, name) \
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((LHASH_OF(type) *)lh_new(LHASH_HASH_FN(name), LHASH_COMP_FN(name)))
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#define LHM_lh_error(type, lh) \
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lh_error(CHECKED_LHASH_OF(type,lh))
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#define LHM_lh_insert(type, lh, inst) \
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((type *)lh_insert(CHECKED_LHASH_OF(type, lh), \
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CHECKED_PTR_OF(type, inst)))
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#define LHM_lh_retrieve(type, lh, inst) \
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((type *)lh_retrieve(CHECKED_LHASH_OF(type, lh), \
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CHECKED_PTR_OF(type, inst)))
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#define LHM_lh_delete(type, lh, inst) \
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((type *)lh_delete(CHECKED_LHASH_OF(type, lh), \
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CHECKED_PTR_OF(type, inst)))
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#define LHM_lh_doall(type, lh,fn) lh_doall(CHECKED_LHASH_OF(type, lh), fn)
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#define LHM_lh_doall_arg(type, lh, fn, arg_type, arg) \
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lh_doall_arg(CHECKED_LHASH_OF(type, lh), fn, CHECKED_PTR_OF(arg_type, arg))
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#define LHM_lh_num_items(type, lh) lh_num_items(CHECKED_LHASH_OF(type, lh))
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#define LHM_lh_down_load(type, lh) (CHECKED_LHASH_OF(type, lh)->down_load)
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#define LHM_lh_node_stats_bio(type, lh, out) \
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lh_node_stats_bio(CHECKED_LHASH_OF(type, lh), out)
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#define LHM_lh_node_usage_stats_bio(type, lh, out) \
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lh_node_usage_stats_bio(CHECKED_LHASH_OF(type, lh), out)
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#define LHM_lh_stats_bio(type, lh, out) \
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lh_stats_bio(CHECKED_LHASH_OF(type, lh), out)
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#define LHM_lh_free(type, lh) lh_free(CHECKED_LHASH_OF(type, lh))
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DECLARE_LHASH_OF(OPENSSL_STRING);
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DECLARE_LHASH_OF(OPENSSL_CSTRING);
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#ifdef __cplusplus
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}
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#endif
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#endif
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