include/openssl/lhash.h

   1 /*
   2  * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
   3  *
   4  * Licensed under the OpenSSL license (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 HEADER_LHASH_H
  15 # define HEADER_LHASH_H
  16
  17 # include <openssl/e_os2.h>
  18 # include <openssl/bio.h>
  19
  20 #ifdef  __cplusplus
  21 extern "C" {
  22 #endif
  23
  24 typedef struct lhash_node_st OPENSSL_LH_NODE;
  25 typedef int (*OPENSSL_LH_COMPFUNC) (const void *, const void *);
  26 typedef unsigned long (*OPENSSL_LH_HASHFUNC) (const void *);
  27 typedef void (*OPENSSL_LH_DOALL_FUNC) (void *);
  28 typedef void (*OPENSSL_LH_DOALL_FUNCARG) (void *, void *);
  29 typedef struct lhash_st OPENSSL_LHASH;
  30
  31 /*
  32  * Macros for declaring and implementing type-safe wrappers for LHASH
  33  * callbacks. This way, callbacks can be provided to LHASH structures without
  34  * function pointer casting and the macro-defined callbacks provide
  35  * per-variable casting before deferring to the underlying type-specific
  36  * callbacks. NB: It is possible to place a "static" in front of both the
  37  * DECLARE and IMPLEMENT macros if the functions are strictly internal.
  38  */
  39
  40 /* First: "hash" functions */
  41 # define DECLARE_LHASH_HASH_FN(name, o_type) \
  42         unsigned long name##_LHASH_HASH(const void *);
  43 # define IMPLEMENT_LHASH_HASH_FN(name, o_type) \
  44         unsigned long name##_LHASH_HASH(const void *arg) { \
  45                 const o_type *a = arg; \
  46                 return name##_hash(a); }
  47 # define LHASH_HASH_FN(name) name##_LHASH_HASH
  48
  49 /* Second: "compare" functions */
  50 # define DECLARE_LHASH_COMP_FN(name, o_type) \
  51         int name##_LHASH_COMP(const void *, const void *);
  52 # define IMPLEMENT_LHASH_COMP_FN(name, o_type) \
  53         int name##_LHASH_COMP(const void *arg1, const void *arg2) { \
  54                 const o_type *a = arg1;             \
  55                 const o_type *b = arg2; \
  56                 return name##_cmp(a,b); }
  57 # define LHASH_COMP_FN(name) name##_LHASH_COMP
  58
  59 /* Fourth: "doall_arg" functions */
  60 # define DECLARE_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
  61         void name##_LHASH_DOALL_ARG(void *, void *);
  62 # define IMPLEMENT_LHASH_DOALL_ARG_FN(name, o_type, a_type) \
  63         void name##_LHASH_DOALL_ARG(void *arg1, void *arg2) { \
  64                 o_type *a = arg1; \
  65                 a_type *b = arg2; \
  66                 name##_doall_arg(a, b); }
  67 # define LHASH_DOALL_ARG_FN(name) name##_LHASH_DOALL_ARG
  68
  69
  70 # define LH_LOAD_MULT    256
  71
  72 int OPENSSL_LH_error(OPENSSL_LHASH *lh);
  73 OPENSSL_LHASH *OPENSSL_LH_new(OPENSSL_LH_HASHFUNC h, OPENSSL_LH_COMPFUNC c);
  74 void OPENSSL_LH_free(OPENSSL_LHASH *lh);
  75 void *OPENSSL_LH_insert(OPENSSL_LHASH *lh, void *data);
  76 void *OPENSSL_LH_delete(OPENSSL_LHASH *lh, const void *data);
  77 void *OPENSSL_LH_retrieve(OPENSSL_LHASH *lh, const void *data);
  78 void OPENSSL_LH_doall(OPENSSL_LHASH *lh, OPENSSL_LH_DOALL_FUNC func);
  79 void OPENSSL_LH_doall_arg(OPENSSL_LHASH *lh, OPENSSL_LH_DOALL_FUNCARG func, void *arg);
  80 unsigned long OPENSSL_LH_strhash(const char *c);
  81 unsigned long OPENSSL_LH_num_items(const OPENSSL_LHASH *lh);
  82 unsigned long OPENSSL_LH_get_down_load(const OPENSSL_LHASH *lh);
  83 void OPENSSL_LH_set_down_load(OPENSSL_LHASH *lh, unsigned long down_load);
  84
  85 # ifndef OPENSSL_NO_STDIO
  86 void OPENSSL_LH_stats(const OPENSSL_LHASH *lh, FILE *fp);
  87 void OPENSSL_LH_node_stats(const OPENSSL_LHASH *lh, FILE *fp);
  88 void OPENSSL_LH_node_usage_stats(const OPENSSL_LHASH *lh, FILE *fp);
  89 # endif
  90 void OPENSSL_LH_stats_bio(const OPENSSL_LHASH *lh, BIO *out);
  91 void OPENSSL_LH_node_stats_bio(const OPENSSL_LHASH *lh, BIO *out);
  92 void OPENSSL_LH_node_usage_stats_bio(const OPENSSL_LHASH *lh, BIO *out);
  93
  94 # if !OPENSSL_API_1_1_0
  95 #  define _LHASH OPENSSL_LHASH
  96 #  define LHASH_NODE OPENSSL_LH_NODE
  97 #  define lh_error OPENSSL_LH_error
  98 #  define lh_new OPENSSL_LH_new
  99 #  define lh_free OPENSSL_LH_free
 100 #  define lh_insert OPENSSL_LH_insert
 101 #  define lh_delete OPENSSL_LH_delete
 102 #  define lh_retrieve OPENSSL_LH_retrieve
 103 #  define lh_doall OPENSSL_LH_doall
 104 #  define lh_doall_arg OPENSSL_LH_doall_arg
 105 #  define lh_strhash OPENSSL_LH_strhash
 106 #  define lh_num_items OPENSSL_LH_num_items
 107 #  ifndef OPENSSL_NO_STDIO
 108 #   define lh_stats OPENSSL_LH_stats
 109 #   define lh_node_stats OPENSSL_LH_node_stats
 110 #   define lh_node_usage_stats OPENSSL_LH_node_usage_stats
 111 #  endif
 112 #  define lh_stats_bio OPENSSL_LH_stats_bio
 113 #  define lh_node_stats_bio OPENSSL_LH_node_stats_bio
 114 #  define lh_node_usage_stats_bio OPENSSL_LH_node_usage_stats_bio
 115 # endif
 116
 117 /* Type checking... */
 118
 119 # define LHASH_OF(type) struct lhash_st_##type
 120
 121 # define DEFINE_LHASH_OF(type) \
 122     LHASH_OF(type) { union lh_##type##_dummy { void* d1; unsigned long d2; int d3; } dummy; }; \
 123     static ossl_inline LHASH_OF(type) * \
 124         lh_##type##_new(unsigned long (*hfn)(const type *), \
 125                         int (*cfn)(const type *, const type *)) \
 126     { \
 127         return (LHASH_OF(type) *) \
 128             OPENSSL_LH_new((OPENSSL_LH_HASHFUNC)hfn, (OPENSSL_LH_COMPFUNC)cfn); \
 129     } \
 130     static ossl_inline void lh_##type##_free(LHASH_OF(type) *lh) \
 131     { \
 132         OPENSSL_LH_free((OPENSSL_LHASH *)lh); \
 133     } \
 134     static ossl_inline type *lh_##type##_insert(LHASH_OF(type) *lh, type *d) \
 135     { \
 136         return (type *)OPENSSL_LH_insert((OPENSSL_LHASH *)lh, d); \
 137     } \
 138     static ossl_inline type *lh_##type##_delete(LHASH_OF(type) *lh, const type *d) \
 139     { \
 140         return (type *)OPENSSL_LH_delete((OPENSSL_LHASH *)lh, d); \
 141     } \
 142     static ossl_inline type *lh_##type##_retrieve(LHASH_OF(type) *lh, const type *d) \
 143     { \
 144         return (type *)OPENSSL_LH_retrieve((OPENSSL_LHASH *)lh, d); \
 145     } \
 146     static ossl_inline int lh_##type##_error(LHASH_OF(type) *lh) \
 147     { \
 148         return OPENSSL_LH_error((OPENSSL_LHASH *)lh); \
 149     } \
 150     static ossl_inline unsigned long lh_##type##_num_items(LHASH_OF(type) *lh) \
 151     { \
 152         return OPENSSL_LH_num_items((OPENSSL_LHASH *)lh); \
 153     } \
 154     static ossl_inline void lh_##type##_node_stats_bio(const LHASH_OF(type) *lh, BIO *out) \
 155     { \
 156         OPENSSL_LH_node_stats_bio((const OPENSSL_LHASH *)lh, out); \
 157     } \
 158     static ossl_inline void lh_##type##_node_usage_stats_bio(const LHASH_OF(type) *lh, BIO *out) \
 159     { \
 160         OPENSSL_LH_node_usage_stats_bio((const OPENSSL_LHASH *)lh, out); \
 161     } \
 162     static ossl_inline void lh_##type##_stats_bio(const LHASH_OF(type) *lh, BIO *out) \
 163     { \
 164         OPENSSL_LH_stats_bio((const OPENSSL_LHASH *)lh, out); \
 165     } \
 166     static ossl_inline unsigned long lh_##type##_get_down_load(LHASH_OF(type) *lh) \
 167     { \
 168         return OPENSSL_LH_get_down_load((OPENSSL_LHASH *)lh); \
 169     } \
 170     static ossl_inline void lh_##type##_set_down_load(LHASH_OF(type) *lh, unsigned long dl) \
 171     { \
 172         OPENSSL_LH_set_down_load((OPENSSL_LHASH *)lh, dl); \
 173     } \
 174     static ossl_inline void lh_##type##_doall(LHASH_OF(type) *lh, \
 175                                          void (*doall)(type *)) \
 176     { \
 177         OPENSSL_LH_doall((OPENSSL_LHASH *)lh, (OPENSSL_LH_DOALL_FUNC)doall); \
 178     } \
 179     LHASH_OF(type)
 180
 181 #define IMPLEMENT_LHASH_DOALL_ARG_CONST(type, argtype) \
 182     int_implement_lhash_doall(type, argtype, const type)
 183
 184 #define IMPLEMENT_LHASH_DOALL_ARG(type, argtype) \
 185     int_implement_lhash_doall(type, argtype, type)
 186
 187 #define int_implement_lhash_doall(type, argtype, cbargtype) \
 188     static ossl_inline void \
 189         lh_##type##_doall_##argtype(LHASH_OF(type) *lh, \
 190                                    void (*fn)(cbargtype *, argtype *), \
 191                                    argtype *arg) \
 192     { \
 193         OPENSSL_LH_doall_arg((OPENSSL_LHASH *)lh, (OPENSSL_LH_DOALL_FUNCARG)fn, (void *)arg); \
 194     } \
 195     LHASH_OF(type)
 196
 197 DEFINE_LHASH_OF(OPENSSL_STRING);
 198 # ifdef _MSC_VER
 199 /*
 200  * push and pop this warning:
 201  *   warning C4090: 'function': different 'const' qualifiers
 202  */
 203 #  pragma warning (push)
 204 #  pragma warning (disable: 4090)
 205 # endif
 206
 207 DEFINE_LHASH_OF(OPENSSL_CSTRING);
 208
 209 # ifdef _MSC_VER
 210 #  pragma warning (pop)
 211 # endif
 212
 213 #ifdef  __cplusplus
 214 }
 215 #endif
 216
 217 #endif