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