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annotate urogue/dict.h @ 256:c495a4f288c6

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Import UltraRogue from the Roguelike Restoration Project (r1490)
author John "Elwin" Edwards
date Tue, 31 Jan 2017 19:56:04 -0500
parents
children 13b482bd9e66
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1 /*
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2 dict.h
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3
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4 UltraRogue: The Ultimate Adventure in the Dungeons of Doom
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5 Copyright (C) 1995 Herb Chong
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6 All rights reserved.
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7
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8 See the file LICENSE.TXT for full copyright and licensing information.
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9 */
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10
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11 /*-----------------
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12 Change history:
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13 (AK:04/03/95) - Added hook for extensions to dictionary structure.
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14 (AK:04/04/95) - Added dictionary signature, table of contents and parameter
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15 structure defintions and fields in DICTIONARY structure
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16 -------------------*/
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17
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18 #ifndef dict_h_included
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19 #define dict_h_included
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20
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21 static char dict_sccsid[] = "%W% %G%";
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22
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23 #ifndef TRUE
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24 #define TRUE 1
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25 #define FALSE 0
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26 #endif
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27
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28 #define DICT_NONE 0x00000000 /* no flags set */
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29 #define DICT_VALIDATE 0xdeadbeef /* look for this in every dictionary structure */
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30 #define DICT_ENTRY_NONE -1 /* index of invalid entry */
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31
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32 typedef unsigned char BOOLEANC;
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33
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34 /*------------------
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35 string table entry
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36 ------------------*/
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37 typedef struct string_entry {
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38 long string_offset; /* offset in string array */
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39 long count; /* number of occurrences of string */
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40 long next; /* offset of next in hash chain */
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41 void *any_ptr; /* free pointer */
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42 unsigned long flags; /* user definable flag value for string */
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43 unsigned long hash_value; /* hash value of string using hash function */
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44 } STRING_ENTRY;
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45
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46 /*--------------------
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47 Dictionary signature (AK:04/04/95)
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48 --------------------*/
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49 typedef struct dict_sig_ { /* Dictionary signature */
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50 unsigned long check_value; /* 0xdeadbeef */
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51 int toc_size; /* # of entries in Table of Contents */
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52 long nparms; /* # of parameters */
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53 unsigned long checksum; /* Checksum for TOC */
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54 } DICT_SIG;
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55
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56 /*----------------------------------
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57 Dictionary table of contents entry (AK:04/04/95)
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58 ----------------------------------*/
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59 typedef struct TOC_entry_ { /* Dictionary table of contents entry */
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60 char id[5]; /* Field identifier: */
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61 long offset; /* Offset (bytes) of entry in file */
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62 long size; /* Size (bytes) of entry */
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63 void *ptr; /* Where entry is stored in memory */
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64 unsigned long checksum; /* Checksum of entry */
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65 int type; /* 0=ordinary ; 1=EVECTOR ; 2=NULL */
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66 } DICT_TOC_ENTRY;
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67
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68 /*--------------------------------
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69 Dictionary parameter table entry (AK:04/04/95)
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70 --------------------------------*/
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71 typedef struct dict_parm_entry_ { /* Dictionary parameter table entry */
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72 char id[13]; /* Parameter identifier */
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73 unsigned long value; /* Parameter value */
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74 } DICT_PARM_ENTRY;
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75
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76
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77 /*---------------------------
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78 Hash dictionary information
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79 ---------------------------*/
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80 typedef struct dictionary {
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81 unsigned long check_value; /* check validation value */
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82 unsigned long flags; /* flag values */
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83 long entry_count; /* number of used entries in each table */
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84
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85 char *string_array; /* storage for strings */
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86 long array_size; /* number of bytes allocated */
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87 long array_used; /* number of bytes occupied */
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88 int array_growth_count; /* number of times grown */
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89
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90 STRING_ENTRY *string_table; /* string table */
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91 long string_max; /* max number of entries in string table */
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92 long scan_string_index; /* current index into string table for scan */
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93 int string_growth_count; /* number of times had to grow string table */
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94
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95 long *chains; /* vector of array indices to hash entries */
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96 int longest_chain_length; /* longest chain length in hash table */
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97 int allowable_chain_length; /* chain lengths always < this */
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98 long table_size; /* number of elements in hash entries vector */
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99 unsigned long hash_mask; /* mask for doing mod() function */
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100 int hash_growth_count; /* number of times had to grow hash table */
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101
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102 void *ext; /* Hook for extensions to the dictionary (AK:04/03/95) */
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103
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104 DICT_SIG *sig; /* Signature (AK:04/04/95) */
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105 DICT_TOC_ENTRY *toc; /* Table of contents (AK:04/04/95) */
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106 DICT_PARM_ENTRY *parm; /* Parameters (AK:04/04/95) */
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107
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108 } DICTIONARY;
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109
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110 /*--------------------------------------------------------------
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111 dict_create: create a dictionary and initialize its structures
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112 --------------------------------------------------------------*/
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113 extern DICTIONARY *dict_create(
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114 const long toc_size,
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115 const long initial_string_count,
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116 const long initial_hash_entries,
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117 const long max_chain_length );
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118
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119 /*-------------------------------------------------
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120 dict_delete: deletes an entry from the dictionary
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121 -------------------------------------------------*/
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122 extern BOOLEANC dict_delete(
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123 const DICTIONARY *dict,
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124 const char *s,
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125 const long count );
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126
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127 /*---------------------------------------------------
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128 dict_destroy: discard a dictionary and its contents
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129 ---------------------------------------------------*/
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130 extern BOOLEANC dict_destroy(
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131 DICTIONARY *dict );
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132
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133 /*------------------------------------------------
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134 dict_export: write a dictionary to an ASCII file
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135 ------------------------------------------------*/
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136 extern BOOLEANC dict_export(
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137 DICTIONARY *dict,
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138 const char *fname );
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139
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140 /*-------------------------------------------------
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141 dict_import: read a dictionary from an ASCII file
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142 -------------------------------------------------*/
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143 extern DICTIONARY *dict_import(
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144 const char *dict_fname,
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145 const long initial_string_count,
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146 const long initial_hash_entries,
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147 const long max_chain_length );
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148
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149 /*------------------------------------------------------------------
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150 dict_insert: add entries into the dictionary, growing as necessary
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151 ------------------------------------------------------------------*/
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152 extern STRING_ENTRY *dict_insert(
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153 DICTIONARY *dict,
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154 char *s,
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155 const long occurences,
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156 const unsigned long flags,
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157 void *any_ptr,
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158 long *number );
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159
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160 /*----------------------------------------------------
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161 dict_load: read a dictionary from a file into memory
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162 ----------------------------------------------------*/
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163 extern DICTIONARY *dict_load(
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164 const char *fname );
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165
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166 /*-----------------------------------------------------------------
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167 dict_merge: merges the contents of a dictionary into another one,
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168 updating the contents of the destination
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169 -----------------------------------------------------------------*/
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170 extern BOOLEANC dict_merge(
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171 const DICTIONARY *dst,
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172 const DICTIONARY *src,
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173 const BOOLEANC move );
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174
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175 /*----------------------------------------------------
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176 dict_save: save a dictionary from memory into a file
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177 ----------------------------------------------------*/
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178 extern BOOLEANC dict_save(
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179 DICTIONARY *dict,
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180 const char *fname );
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181
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182 /*-----------------------------------------------
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183 dict_scan_begin: begin a scan of the dictionary
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184 -----------------------------------------------*/
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185 extern BOOLEANC dict_scan_begin(
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186 DICTIONARY *dict );
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187
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188 /*--------------------------------------------
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189 dict_scan_next: get the next entry in a scan
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190 --------------------------------------------*/
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191 extern STRING_ENTRY *dict_scan_next(
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192 DICTIONARY *dict );
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193
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194 /*-----------------------------------------------
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195 dict_search: look for entries in the dictionary
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196 -----------------------------------------------*/
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197 extern STRING_ENTRY *dict_search(
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198 const DICTIONARY *dict,
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199 const char *s,
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200 long *number );
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201
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202 /*----------------------------------------------------------------------
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203 dict_string_by_number: return string pointer for a given string number
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204 ----------------------------------------------------------------------*/
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205 extern STRING_ENTRY *dict_string_by_number(
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206 const DICTIONARY *dict,
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207 const long number );
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208
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209 /*----------------------------------------------------------
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210 dict_union: merges contents of 2 dictionaries into a third
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211 ----------------------------------------------------------*/
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212 extern DICTIONARY *dict_union(
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213 const DICTIONARY *dict1,
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214 const DICTIONARY *dict2 );
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215
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216 #endif /* dict_h_included */