include/openssl/lhash.h

   1 /*
   2  * Copyright 1995-2019 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the Apache License 2.0 (the "License").  You may not use
   5  * this file except in compliance with the License.  You can obtain a copy
   6  * in the file LICENSE in the source distribution or at
   7  * https://www.openssl.org/source/license.html
   8  */
   9
  10 /*
  11  * Header for dynamic hash table routines Author - Eric Young
  12  */
  13
  14 #ifndef OPENSSL_LHASH_H
  15 # define OPENSSL_LHASH_H
  16 # pragma once
  17
  18 # include <openssl/macros.h>
  19 # if !OPENSSL_API_3
  20 #  define HEADER_LHASH_H
  21 # endif
  22
  23 # include <openssl/e_os2.h>
  24 # include <openssl/bio.h>
  25
  26 #ifdef  __cplusplus
  27 extern "C" {
  28 #endif
  29
  30 typedef struct lhash_node_st OPENSSL_LH_NODE;
  31 typedef int (*OPENSSL_LH_COMPFUNC) (const void *, const void *);
  32 typedef unsigned long (*OPENSSL_LH_HASHFUNC) (const void *);
  33 typedef void (*OPENSSL_LH_DOALL_FUNC) (void *);
  34 typedef void (*OPENSSL_LH_DOALL_FUNCARG) (void *, void *);
  35 typedef struct lhash_st OPENSSL_LHASH;
  36
  37 /*
  38  * Macros for declaring and implementing type-safe wrappers for LHASH
  39  * callbacks. This way, callbacks can be provided to LHASH structures without
  40  * function pointer casting and the macro-defined callbacks provide
  41  * per-variable casting before deferring to the underlying type-specific
  42  * callbacks. NB: It is possible to place a "static" in front of both the
  43  * DECLARE and IMPLEMENT macros if the functions are strictly internal.
  44  */
  45
  46 /* First: "hash" functions */
  47 # define DECLARE_LHASH_HASH_FN(name, o_type) \
  48         unsigned long name##_LHASH_HASH(const void *);
  49 # define IMPLEMENT_LHASH_HASH_FN(name, o_type) \
  50         unsigned long name##_LHASH_HASH(const void *arg) { \
  51                 const o_type *a = arg; \
  52                 return name##_hash(a); }
  53 # define LHASH_HASH_FN(name) name##_LHASH_HASH
  54
  55 /* Second: "compare" functions */
  56 # define DECLARE_LHASH_COMP_FN(name, o_type) \
  57         int name##_LHASH_COMP(const void *, const void *);
  58 # define IMPLEMENT_LHASH_COMP_FN(name, o_type) \
  59         int name##_LHASH_COMP(const void *arg1, const void *arg2) { \
  60                 const o_type *a = arg1;             \
  61                 const o_type *b = arg2; \
  62                 return name##_cmp(a,b); }
  63 # define LHASH_COMP_FN(name) name##_LHASH_COMP
  64
  65 /* Fourth: "doall_arg" functions */
  66 # define DECLARE_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
  67         void name##_LHASH_DOALL_ARG(void *, void *);
  68 # define IMPLEMENT_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
  69         void name##_LHASH_DOALL_ARG(void *arg1, void *arg2) { \
  70                 o_type *a = arg1; \
  71                 a_type *b = arg2; \
  72                 name##_doall_arg(a, b); }
  73 # define LHASH_DOALL_ARG_FN(name) name##_LHASH_DOALL_ARG
  74
  75
  76 # define LH_LOAD_MULT    256
  77
  78 int OPENSSL_LH_error(OPENSSL_LHASH *lh);
  79 OPENSSL_LHASH *OPENSSL_LH_new(OPENSSL_LH_HASHFUNC h, OPENSSL_LH_COMPFUNC c);
  80 void OPENSSL_LH_free(OPENSSL_LHASH *lh);
  81 void OPENSSL_LH_flush(OPENSSL_LHASH *lh);
  82 void *OPENSSL_LH_insert(OPENSSL_LHASH *lh, void *data);
  83 void *OPENSSL_LH_delete(OPENSSL_LHASH *lh, const void *data);
  84 void *OPENSSL_LH_retrieve(OPENSSL_LHASH *lh, const void *data);
  85 void OPENSSL_LH_doall(OPENSSL_LHASH *lh, OPENSSL_LH_DOALL_FUNC func);
  86 void OPENSSL_LH_doall_arg(OPENSSL_LHASH *lh, OPENSSL_LH_DOALL_FUNCARG func, void *arg);
  87 unsigned long OPENSSL_LH_strhash(const char *c);
  88 unsigned long OPENSSL_LH_num_items(const OPENSSL_LHASH *lh);
  89 unsigned long OPENSSL_LH_get_down_load(const OPENSSL_LHASH *lh);
  90 void OPENSSL_LH_set_down_load(OPENSSL_LHASH *lh, unsigned long down_load);
  91
  92 # ifndef OPENSSL_NO_STDIO
  93 void OPENSSL_LH_stats(const OPENSSL_LHASH *lh, FILE *fp);
  94 void OPENSSL_LH_node_stats(const OPENSSL_LHASH *lh, FILE *fp);
  95 void OPENSSL_LH_node_usage_stats(const OPENSSL_LHASH *lh, FILE *fp);
  96 # endif
  97 void OPENSSL_LH_stats_bio(const OPENSSL_LHASH *lh, BIO *out);
  98 void OPENSSL_LH_node_stats_bio(const OPENSSL_LHASH *lh, BIO *out);
  99 void OPENSSL_LH_node_usage_stats_bio(const OPENSSL_LHASH *lh, BIO *out);
 100
 101 # if !OPENSSL_API_1_1_0
 102 #  define _LHASH OPENSSL_LHASH
 103 #  define LHASH_NODE OPENSSL_LH_NODE
 104 #  define lh_error OPENSSL_LH_error
 105 #  define lh_new OPENSSL_LH_new
 106 #  define lh_free OPENSSL_LH_free
 107 #  define lh_insert OPENSSL_LH_insert
 108 #  define lh_delete OPENSSL_LH_delete
 109 #  define lh_retrieve OPENSSL_LH_retrieve
 110 #  define lh_doall OPENSSL_LH_doall
 111 #  define lh_doall_arg OPENSSL_LH_doall_arg
 112 #  define lh_strhash OPENSSL_LH_strhash
 113 #  define lh_num_items OPENSSL_LH_num_items
 114 #  ifndef OPENSSL_NO_STDIO
 115 #   define lh_stats OPENSSL_LH_stats
 116 #   define lh_node_stats OPENSSL_LH_node_stats
 117 #   define lh_node_usage_stats OPENSSL_LH_node_usage_stats
 118 #  endif
 119 #  define lh_stats_bio OPENSSL_LH_stats_bio
 120 #  define lh_node_stats_bio OPENSSL_LH_node_stats_bio
 121 #  define lh_node_usage_stats_bio OPENSSL_LH_node_usage_stats_bio
 122 # endif
 123
 124 /* Type checking... */
 125
 126 # define LHASH_OF(type) struct lhash_st_##type
 127
 128 # define DEFINE_LHASH_OF(type) \
 129     LHASH_OF(type) { union lh_##type##_dummy { void* d1; unsigned long d2; int d3; } dummy; }; \
 130     static ossl_inline LHASH_OF(type) * \
 131         lh_##type##_new(unsigned long (*hfn)(const type *), \
 132                         int (*cfn)(const type *, const type *)) \
 133     { \
 134         return (LHASH_OF(type) *) \
 135             OPENSSL_LH_new((OPENSSL_LH_HASHFUNC)hfn, (OPENSSL_LH_COMPFUNC)cfn); \
 136     } \
 137     static ossl_unused ossl_inline void lh_##type##_free(LHASH_OF(type) *lh) \
 138     { \
 139         OPENSSL_LH_free((OPENSSL_LHASH *)lh); \
 140     } \
 141     static ossl_unused ossl_inline void lh_##type##_flush(LHASH_OF(type) *lh) \
 142     { \
 143         OPENSSL_LH_flush((OPENSSL_LHASH *)lh); \
 144     } \
 145     static ossl_unused ossl_inline type *lh_##type##_insert(LHASH_OF(type) *lh, type *d) \
 146     { \
 147         return (type *)OPENSSL_LH_insert((OPENSSL_LHASH *)lh, d); \
 148     } \
 149     static ossl_unused ossl_inline type *lh_##type##_delete(LHASH_OF(type) *lh, const type *d) \
 150     { \
 151         return (type *)OPENSSL_LH_delete((OPENSSL_LHASH *)lh, d); \
 152     } \
 153     static ossl_unused ossl_inline type *lh_##type##_retrieve(LHASH_OF(type) *lh, const type *d) \
 154     { \
 155         return (type *)OPENSSL_LH_retrieve((OPENSSL_LHASH *)lh, d); \
 156     } \
 157     static ossl_unused ossl_inline int lh_##type##_error(LHASH_OF(type) *lh) \
 158     { \
 159         return OPENSSL_LH_error((OPENSSL_LHASH *)lh); \
 160     } \
 161     static ossl_unused ossl_inline unsigned long lh_##type##_num_items(LHASH_OF(type) *lh) \
 162     { \
 163         return OPENSSL_LH_num_items((OPENSSL_LHASH *)lh); \
 164     } \
 165     static ossl_unused ossl_inline void lh_##type##_node_stats_bio(const LHASH_OF(type) *lh, BIO *out) \
 166     { \
 167         OPENSSL_LH_node_stats_bio((const OPENSSL_LHASH *)lh, out); \
 168     } \
 169     static ossl_unused ossl_inline void lh_##type##_node_usage_stats_bio(const LHASH_OF(type) *lh, BIO *out) \
 170     { \
 171         OPENSSL_LH_node_usage_stats_bio((const OPENSSL_LHASH *)lh, out); \
 172     } \
 173     static ossl_unused ossl_inline void lh_##type##_stats_bio(const LHASH_OF(type) *lh, BIO *out) \
 174     { \
 175         OPENSSL_LH_stats_bio((const OPENSSL_LHASH *)lh, out); \
 176     } \
 177     static ossl_unused ossl_inline unsigned long lh_##type##_get_down_load(LHASH_OF(type) *lh) \
 178     { \
 179         return OPENSSL_LH_get_down_load((OPENSSL_LHASH *)lh); \
 180     } \
 181     static ossl_unused ossl_inline void lh_##type##_set_down_load(LHASH_OF(type) *lh, unsigned long dl) \
 182     { \
 183         OPENSSL_LH_set_down_load((OPENSSL_LHASH *)lh, dl); \
 184     } \
 185     static ossl_unused ossl_inline void lh_##type##_doall(LHASH_OF(type) *lh, \
 186                                                           void (*doall)(type *)) \
 187     { \
 188         OPENSSL_LH_doall((OPENSSL_LHASH *)lh, (OPENSSL_LH_DOALL_FUNC)doall); \
 189     } \
 190     LHASH_OF(type)
 191
 192 #define IMPLEMENT_LHASH_DOALL_ARG_CONST(type, argtype) \
 193     int_implement_lhash_doall(type, argtype, const type)
 194
 195 #define IMPLEMENT_LHASH_DOALL_ARG(type, argtype) \
 196     int_implement_lhash_doall(type, argtype, type)
 197
 198 #define int_implement_lhash_doall(type, argtype, cbargtype) \
 199     static ossl_unused ossl_inline void \
 200         lh_##type##_doall_##argtype(LHASH_OF(type) *lh, \
 201                                    void (*fn)(cbargtype *, argtype *), \
 202                                    argtype *arg) \
 203     { \
 204         OPENSSL_LH_doall_arg((OPENSSL_LHASH *)lh, (OPENSSL_LH_DOALL_FUNCARG)fn, (void *)arg); \
 205     } \
 206     LHASH_OF(type)
 207
 208 DEFINE_LHASH_OF(OPENSSL_STRING);
 209 # ifdef _MSC_VER
 210 /*
 211  * push and pop this warning:
 212  *   warning C4090: 'function': different 'const' qualifiers
 213  */
 214 #  pragma warning (push)
 215 #  pragma warning (disable: 4090)
 216 # endif
 217
 218 DEFINE_LHASH_OF(OPENSSL_CSTRING);
 219
 220 # ifdef _MSC_VER
 221 #  pragma warning (pop)
 222 # endif
 223
 224 /*
 225  * If called without higher optimization (min. -xO3) the Oracle Developer
 226  * Studio compiler generates code for the defined (static inline) functions
 227  * above.
 228  * This would later lead to the linker complaining about missing symbols when
 229  * this header file is included but the resulting object is not linked against
 230  * the Crypto library (openssl#6912).
 231  */
 232 # ifdef __SUNPRO_C
 233 #  pragma weak OPENSSL_LH_new
 234 #  pragma weak OPENSSL_LH_free
 235 #  pragma weak OPENSSL_LH_insert
 236 #  pragma weak OPENSSL_LH_delete
 237 #  pragma weak OPENSSL_LH_retrieve
 238 #  pragma weak OPENSSL_LH_error
 239 #  pragma weak OPENSSL_LH_num_items
 240 #  pragma weak OPENSSL_LH_node_stats_bio
 241 #  pragma weak OPENSSL_LH_node_usage_stats_bio
 242 #  pragma weak OPENSSL_LH_stats_bio
 243 #  pragma weak OPENSSL_LH_get_down_load
 244 #  pragma weak OPENSSL_LH_set_down_load
 245 #  pragma weak OPENSSL_LH_doall
 246 #  pragma weak OPENSSL_LH_doall_arg
 247 # endif /* __SUNPRO_C */
 248
 249 #ifdef  __cplusplus
 250 }
 251 #endif
 252
 253 #endif