1 | /**CHeaderFile***************************************************************** |
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2 | |
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3 | FileName [st.h] |
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4 | |
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5 | PackageName [st] |
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6 | |
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7 | Synopsis [Symbol table package.] |
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8 | |
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9 | Description [The st library provides functions to create, maintain, |
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10 | and query symbol tables.] |
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11 | |
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12 | SeeAlso [] |
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13 | |
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14 | Author [] |
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15 | |
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16 | Copyright [] |
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17 | |
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18 | Revision [$Id: st.h,v 1.4 2005/04/13 05:02:20 fabio Exp $] |
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19 | |
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20 | ******************************************************************************/ |
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21 | |
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22 | #ifndef ST_INCLUDED |
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23 | #define ST_INCLUDED |
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24 | |
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25 | /*---------------------------------------------------------------------------*/ |
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26 | /* Nested includes */ |
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27 | /*---------------------------------------------------------------------------*/ |
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28 | |
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29 | #ifdef __cplusplus |
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30 | extern "C" { |
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31 | #endif |
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32 | |
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33 | /*---------------------------------------------------------------------------*/ |
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34 | /* Constant declarations */ |
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35 | /*---------------------------------------------------------------------------*/ |
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36 | |
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37 | #define ST_DEFAULT_MAX_DENSITY 5 |
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38 | #define ST_DEFAULT_INIT_TABLE_SIZE 11 |
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39 | #define ST_DEFAULT_GROW_FACTOR 2.0 |
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40 | #define ST_DEFAULT_REORDER_FLAG 0 |
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41 | #define ST_OUT_OF_MEM -10000 |
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42 | |
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43 | /*---------------------------------------------------------------------------*/ |
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44 | /* Stucture declarations */ |
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45 | /*---------------------------------------------------------------------------*/ |
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46 | |
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47 | |
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48 | /*---------------------------------------------------------------------------*/ |
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49 | /* Type declarations */ |
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50 | /*---------------------------------------------------------------------------*/ |
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51 | |
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52 | typedef struct st_table_entry st_table_entry; |
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53 | struct st_table_entry { |
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54 | char *key; |
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55 | char *record; |
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56 | st_table_entry *next; |
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57 | }; |
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58 | |
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59 | typedef struct st_table st_table; |
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60 | struct st_table { |
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61 | int (*compare)(const char *, const char *); |
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62 | int (*hash)(char *, int); |
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63 | int num_bins; |
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64 | int num_entries; |
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65 | int max_density; |
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66 | int reorder_flag; |
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67 | double grow_factor; |
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68 | st_table_entry **bins; |
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69 | }; |
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70 | |
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71 | typedef struct st_generator st_generator; |
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72 | struct st_generator { |
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73 | st_table *table; |
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74 | st_table_entry *entry; |
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75 | int index; |
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76 | }; |
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77 | |
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78 | enum st_retval {ST_CONTINUE, ST_STOP, ST_DELETE}; |
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79 | |
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80 | typedef enum st_retval (*ST_PFSR)(char *, char *, char *); |
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81 | |
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82 | typedef int (*ST_PFICPCP)(const char *, const char *); /* type for comparison function */ |
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83 | |
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84 | typedef int (*ST_PFICPI)(char *, int); /* type for hash function */ |
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85 | |
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86 | /*---------------------------------------------------------------------------*/ |
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87 | /* Variable declarations */ |
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88 | /*---------------------------------------------------------------------------*/ |
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89 | |
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90 | |
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91 | /*---------------------------------------------------------------------------*/ |
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92 | /* Macro declarations */ |
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93 | /*---------------------------------------------------------------------------*/ |
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94 | |
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95 | /**Macro*********************************************************************** |
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96 | |
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97 | Synopsis [Checks whethere `key' is in `table'.] |
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98 | |
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99 | Description [Returns 1 if there is an entry under `key' in `table', 0 |
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100 | otherwise.] |
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101 | |
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102 | SideEffects [None] |
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103 | |
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104 | SeeAlso [st_lookup] |
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105 | |
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106 | ******************************************************************************/ |
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107 | #define st_is_member(table,key) st_lookup(table,key,(char **) 0) |
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108 | |
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109 | |
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110 | /**Macro*********************************************************************** |
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111 | |
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112 | Synopsis [Returns the number of entries in the table `table'.] |
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113 | |
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114 | Description [Returns the number of entries in the table `table'.] |
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115 | |
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116 | SideEffects [None] |
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117 | |
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118 | SeeAlso [] |
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119 | |
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120 | ******************************************************************************/ |
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121 | #define st_count(table) ((table)->num_entries) |
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122 | |
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123 | |
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124 | /**Macro*********************************************************************** |
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125 | |
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126 | Synopsis [Iteration macro.] |
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127 | |
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128 | Description [An iteration macro which loops over all the entries in |
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129 | `table', setting `key' to point to the key and `value' to the |
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130 | associated value (if it is not nil). `gen' is a generator variable |
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131 | used internally. Sample usage: |
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132 | <pre> |
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133 | char *key, *value; |
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134 | </pre> |
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135 | <pre> |
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136 | st_generator *gen; |
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137 | </pre> |
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138 | <pre> |
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139 | |
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140 | st_foreach_item(table, gen, &key, &value) { |
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141 | </pre> |
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142 | <pre> |
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143 | process_item(value); |
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144 | </pre> |
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145 | <pre> |
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146 | } |
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147 | </pre> |
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148 | ] |
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149 | |
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150 | SideEffects [None] |
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151 | |
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152 | SeeAlso [st_foreach_item_int st_foreach] |
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153 | |
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154 | ******************************************************************************/ |
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155 | #define st_foreach_item(table, gen, key, value) \ |
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156 | for(gen=st_init_gen(table); st_gen(gen,key,value) || (st_free_gen(gen),0);) |
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157 | |
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158 | |
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159 | /**Macro*********************************************************************** |
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160 | |
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161 | Synopsis [Iteration macro.] |
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162 | |
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163 | Description [An iteration macro which loops over all the entries in |
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164 | `table', setting `key' to point to the key and `value' to the |
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165 | associated value (if it is not nil). `value' is assumed to be a |
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166 | pointer to an integer. `gen' is a generator variable used |
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167 | internally. Sample usage: |
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168 | <pre> |
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169 | char *key; |
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170 | </pre> |
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171 | <pre> |
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172 | int value; |
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173 | </pre> |
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174 | <pre> |
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175 | st_generator *gen; |
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176 | </pre> |
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177 | <pre> |
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178 | |
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179 | st_foreach_item_int(table, gen, &key, &value) { |
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180 | </pre> |
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181 | <pre> |
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182 | process_item(value); |
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183 | </pre> |
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184 | <pre> |
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185 | } |
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186 | </pre> |
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187 | ] |
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188 | |
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189 | SideEffects [None] |
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190 | |
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191 | SeeAlso [st_foreach_item st_foreach] |
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192 | |
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193 | ******************************************************************************/ |
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194 | #define st_foreach_item_int(table, gen, key, value) \ |
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195 | for(gen=st_init_gen(table); st_gen_int(gen,key,value) || (st_free_gen(gen),0);) |
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196 | |
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197 | /**AutomaticStart*************************************************************/ |
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198 | |
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199 | /*---------------------------------------------------------------------------*/ |
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200 | /* Function prototypes */ |
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201 | /*---------------------------------------------------------------------------*/ |
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202 | |
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203 | extern st_table *st_init_table_with_params (ST_PFICPCP, ST_PFICPI, int, int, double, int); |
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204 | extern st_table *st_init_table (ST_PFICPCP, ST_PFICPI); |
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205 | extern void st_free_table (st_table *); |
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206 | extern int st_lookup (st_table *, void *, void *); |
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207 | extern int st_lookup_int (st_table *, void *, int *); |
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208 | extern int st_insert (st_table *, void *, void *); |
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209 | extern int st_add_direct (st_table *, void *, void *); |
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210 | extern int st_find_or_add (st_table *, void *, void *); |
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211 | extern int st_find (st_table *, void *, void *); |
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212 | extern st_table *st_copy (st_table *); |
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213 | extern int st_delete (st_table *, void *, void *); |
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214 | extern int st_delete_int (st_table *, void *, int *); |
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215 | extern int st_foreach (st_table *, ST_PFSR, char *); |
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216 | extern int st_strhash (char *, int); |
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217 | extern int st_numhash (char *, int); |
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218 | extern int st_ptrhash (char *, int); |
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219 | extern int st_numcmp (const char *, const char *); |
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220 | extern int st_ptrcmp (const char *, const char *); |
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221 | extern st_generator *st_init_gen (st_table *); |
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222 | extern int st_gen (st_generator *, void *, void *); |
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223 | extern int st_gen_int (st_generator *, void *, int *); |
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224 | extern void st_free_gen (st_generator *); |
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225 | |
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226 | /**AutomaticEnd***************************************************************/ |
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227 | |
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228 | #ifdef __cplusplus |
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229 | } /* end of extern "C" */ |
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230 | #endif |
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231 | |
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232 | #endif /* ST_INCLUDED */ |
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