include/openssl/lhash.h

   1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
   2  * All rights reserved.
   3  *
   4  * This package is an SSL implementation written
   5  * by Eric Young (eay@cryptsoft.com).
   6  * The implementation was written so as to conform with Netscapes SSL.
   7  *
   8  * This library is free for commercial and non-commercial use as long as
   9  * the following conditions are aheared to.  The following conditions
  10  * apply to all code found in this distribution, be it the RC4, RSA,
  11  * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
  12  * included with this distribution is covered by the same copyright terms
  13  * except that the holder is Tim Hudson (tjh@cryptsoft.com).
  14  *
  15  * Copyright remains Eric Young's, and as such any Copyright notices in
  16  * the code are not to be removed.
  17  * If this package is used in a product, Eric Young should be given attribution
  18  * as the author of the parts of the library used.
  19  * This can be in the form of a textual message at program startup or
  20  * in documentation (online or textual) provided with the package.
  21  *
  22  * Redistribution and use in source and binary forms, with or without
  23  * modification, are permitted provided that the following conditions
  24  * are met:
  25  * 1. Redistributions of source code must retain the copyright
  26  *    notice, this list of conditions and the following disclaimer.
  27  * 2. Redistributions in binary form must reproduce the above copyright
  28  *    notice, this list of conditions and the following disclaimer in the
  29  *    documentation and/or other materials provided with the distribution.
  30  * 3. All advertising materials mentioning features or use of this software
  31  *    must display the following acknowledgement:
  32  *    "This product includes cryptographic software written by
  33  *     Eric Young (eay@cryptsoft.com)"
  34  *    The word 'cryptographic' can be left out if the rouines from the library
  35  *    being used are not cryptographic related :-).
  36  * 4. If you include any Windows specific code (or a derivative thereof) from
  37  *    the apps directory (application code) you must include an acknowledgement:
  38  *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
  39  *
  40  * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
  41  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  42  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  43  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  44  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  45  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  46  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  47  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  48  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  49  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  50  * SUCH DAMAGE.
  51  *
  52  * The licence and distribution terms for any publically available version or
  53  * derivative of this code cannot be changed.  i.e. this code cannot simply be
  54  * copied and put under another distribution licence
  55  * [including the GNU Public Licence.]
  56  */
  57
  58 /*
  59  * Header for dynamic hash table routines Author - Eric Young
  60  */
  61
  62 #ifndef HEADER_LHASH_H
  63 # define HEADER_LHASH_H
  64
  65 # include <openssl/e_os2.h>
  66 # include <openssl/bio.h>
  67
  68 #ifdef  __cplusplus
  69 extern "C" {
  70 #endif
  71
  72 typedef struct lhash_node_st {
  73     void *data;
  74     struct lhash_node_st *next;
  75     unsigned long hash;
  76 } LHASH_NODE;
  77
  78 typedef int (*LHASH_COMP_FN_TYPE) (const void *, const void *);
  79 typedef unsigned long (*LHASH_HASH_FN_TYPE) (const void *);
  80 typedef void (*LHASH_DOALL_FN_TYPE) (void *);
  81 typedef void (*LHASH_DOALL_ARG_FN_TYPE) (void *, void *);
  82
  83 /*
  84  * Macros for declaring and implementing type-safe wrappers for LHASH
  85  * callbacks. This way, callbacks can be provided to LHASH structures without
  86  * function pointer casting and the macro-defined callbacks provide
  87  * per-variable casting before deferring to the underlying type-specific
  88  * callbacks. NB: It is possible to place a "static" in front of both the
  89  * DECLARE and IMPLEMENT macros if the functions are strictly internal.
  90  */
  91
  92 /* First: "hash" functions */
  93 # define DECLARE_LHASH_HASH_FN(name, o_type) \
  94         unsigned long name##_LHASH_HASH(const void *);
  95 # define IMPLEMENT_LHASH_HASH_FN(name, o_type) \
  96         unsigned long name##_LHASH_HASH(const void *arg) { \
  97                 const o_type *a = arg; \
  98                 return name##_hash(a); }
  99 # define LHASH_HASH_FN(name) name##_LHASH_HASH
 100
 101 /* Second: "compare" functions */
 102 # define DECLARE_LHASH_COMP_FN(name, o_type) \
 103         int name##_LHASH_COMP(const void *, const void *);
 104 # define IMPLEMENT_LHASH_COMP_FN(name, o_type) \
 105         int name##_LHASH_COMP(const void *arg1, const void *arg2) { \
 106                 const o_type *a = arg1;             \
 107                 const o_type *b = arg2; \
 108                 return name##_cmp(a,b); }
 109 # define LHASH_COMP_FN(name) name##_LHASH_COMP
 110
 111 /* Fourth: "doall_arg" functions */
 112 # define DECLARE_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
 113         void name##_LHASH_DOALL_ARG(void *, void *);
 114 # define IMPLEMENT_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
 115         void name##_LHASH_DOALL_ARG(void *arg1, void *arg2) { \
 116                 o_type *a = arg1; \
 117                 a_type *b = arg2; \
 118                 name##_doall_arg(a, b); }
 119 # define LHASH_DOALL_ARG_FN(name) name##_LHASH_DOALL_ARG
 120
 121 typedef struct lhash_st {
 122     LHASH_NODE **b;
 123     LHASH_COMP_FN_TYPE comp;
 124     LHASH_HASH_FN_TYPE hash;
 125     unsigned int num_nodes;
 126     unsigned int num_alloc_nodes;
 127     unsigned int p;
 128     unsigned int pmax;
 129     unsigned long up_load;      /* load times 256 */
 130     unsigned long down_load;    /* load times 256 */
 131     unsigned long num_items;
 132     unsigned long num_expands;
 133     unsigned long num_expand_reallocs;
 134     unsigned long num_contracts;
 135     unsigned long num_contract_reallocs;
 136     unsigned long num_hash_calls;
 137     unsigned long num_comp_calls;
 138     unsigned long num_insert;
 139     unsigned long num_replace;
 140     unsigned long num_delete;
 141     unsigned long num_no_delete;
 142     unsigned long num_retrieve;
 143     unsigned long num_retrieve_miss;
 144     unsigned long num_hash_comps;
 145     int error;
 146 } _LHASH;                       /* Do not use _LHASH directly, use LHASH_OF
 147                                  * and friends */
 148
 149 # define LH_LOAD_MULT    256
 150
 151 /*
 152  * Indicates a malloc() error in the last call, this is only bad in
 153  * lh_insert().
 154  */
 155 int lh_error(_LHASH *lh);
 156
 157 _LHASH *lh_new(LHASH_HASH_FN_TYPE h, LHASH_COMP_FN_TYPE c);
 158 void lh_free(_LHASH *lh);
 159 void *lh_insert(_LHASH *lh, void *data);
 160 void *lh_delete(_LHASH *lh, const void *data);
 161 void *lh_retrieve(_LHASH *lh, const void *data);
 162 void lh_doall(_LHASH *lh, LHASH_DOALL_FN_TYPE func);
 163 void lh_doall_arg(_LHASH *lh, LHASH_DOALL_ARG_FN_TYPE func, void *arg);
 164 unsigned long lh_strhash(const char *c);
 165 unsigned long lh_num_items(const _LHASH *lh);
 166 unsigned long lh_get_down_load(const _LHASH *lh);
 167 void lh_set_down_load(_LHASH *lh, unsigned long down_load);
 168
 169 # ifndef OPENSSL_NO_STDIO
 170 void lh_stats(const _LHASH *lh, FILE *fp);
 171 void lh_node_stats(const _LHASH *lh, FILE *fp);
 172 void lh_node_usage_stats(const _LHASH *lh, FILE *fp);
 173 # endif
 174 void lh_stats_bio(const _LHASH *lh, BIO *out);
 175 void lh_node_stats_bio(const _LHASH *lh, BIO *out);
 176 void lh_node_usage_stats_bio(const _LHASH *lh, BIO *out);
 177
 178 /* Type checking... */
 179
 180 # define LHASH_OF(type) struct lhash_st_##type
 181
 182 # define DEFINE_LHASH_OF(type) \
 183     LHASH_OF(type) { int dummy; }; \
 184     static ossl_inline LHASH_OF(type) * \
 185         lh_##type##_new(unsigned long (*hfn)(const type *), \
 186                         int (*cfn)(const type *, const type *)) \
 187     { \
 188         return (LHASH_OF(type) *) \
 189             lh_new((LHASH_HASH_FN_TYPE) hfn, (LHASH_COMP_FN_TYPE)cfn); \
 190     } \
 191     static ossl_inline void lh_##type##_free(LHASH_OF(type) *lh) \
 192     { \
 193         lh_free((_LHASH *)lh); \
 194     } \
 195     static ossl_inline type *lh_##type##_insert(LHASH_OF(type) *lh, type *d) \
 196     { \
 197         return (type *)lh_insert((_LHASH *)lh, d); \
 198     } \
 199     static ossl_inline type *lh_##type##_delete(LHASH_OF(type) *lh, const type *d) \
 200     { \
 201         return (type *)lh_delete((_LHASH *)lh, d); \
 202     } \
 203     static ossl_inline type *lh_##type##_retrieve(LHASH_OF(type) *lh, const type *d) \
 204     { \
 205         return (type *)lh_retrieve((_LHASH *)lh, d); \
 206     } \
 207     static ossl_inline int lh_##type##_error(LHASH_OF(type) *lh) \
 208     { \
 209         return lh_error((_LHASH *)lh); \
 210     } \
 211     static ossl_inline unsigned long lh_##type##_num_items(LHASH_OF(type) *lh) \
 212     { \
 213         return lh_num_items((_LHASH *)lh); \
 214     } \
 215     static ossl_inline void lh_##type##_node_stats_bio(const LHASH_OF(type) *lh, BIO *out) \
 216     { \
 217         lh_node_stats_bio((_LHASH *)lh, out); \
 218     } \
 219     static ossl_inline void lh_##type##_node_usage_stats_bio(const LHASH_OF(type) *lh, BIO *out) \
 220     { \
 221         lh_node_usage_stats_bio((_LHASH *)lh, out); \
 222     } \
 223     static ossl_inline void lh_##type##_stats_bio(const LHASH_OF(type) *lh, BIO *out) \
 224     { \
 225         lh_stats_bio((_LHASH *)lh, out); \
 226     } \
 227     static ossl_inline unsigned long lh_##type##_get_down_load(LHASH_OF(type) *lh) \
 228     { \
 229         return lh_get_down_load((_LHASH *)lh); \
 230     } \
 231     static ossl_inline void lh_##type##_set_down_load(LHASH_OF(type) *lh, unsigned long dl) \
 232     { \
 233         lh_set_down_load((_LHASH *)lh, dl); \
 234     } \
 235     static ossl_inline void lh_##type##_doall(LHASH_OF(type) *lh, \
 236                                          void (*doall)(type *)) \
 237     { \
 238         lh_doall((_LHASH *)lh, (LHASH_DOALL_FN_TYPE)doall); \
 239     } \
 240     LHASH_OF(type)
 241
 242 #define IMPLEMENT_LHASH_DOALL_ARG_CONST(type, argtype) \
 243     int_implement_lhash_doall(type, argtype, const type)
 244
 245 #define IMPLEMENT_LHASH_DOALL_ARG(type, argtype) \
 246     int_implement_lhash_doall(type, argtype, type)
 247
 248 #define int_implement_lhash_doall(type, argtype, cbargtype) \
 249     static ossl_inline void \
 250         lh_##type##_doall_##argtype(LHASH_OF(type) *lh, \
 251                                    void (*fn)(cbargtype *, argtype *), \
 252                                    argtype *arg) \
 253     { \
 254         lh_doall_arg((_LHASH *)lh, (LHASH_DOALL_ARG_FN_TYPE)fn, (void *)arg); \
 255     } \
 256     LHASH_OF(type)
 257
 258 # define CHECKED_LHASH_OF(type,lh) \
 259   ((_LHASH *)CHECKED_PTR_OF(LHASH_OF(type),lh))
 260
 261 /* Define wrapper functions. */
 262 # define LHM_lh_doall_arg(type, lh, fn, arg_type, arg) \
 263   lh_doall_arg(CHECKED_LHASH_OF(type, lh), fn, CHECKED_PTR_OF(arg_type, arg))
 264
 265 DEFINE_LHASH_OF(OPENSSL_STRING);
 266 DEFINE_LHASH_OF(OPENSSL_CSTRING);
 267
 268 #ifdef  __cplusplus
 269 }
 270 #endif
 271
 272 #endif