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428
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1 /* Lisp interface to hash tables -- include file.
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2 Copyright (C) 1995, 1996 Ben Wing.
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3
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4 This file is part of XEmacs.
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5
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6 XEmacs is free software; you can redistribute it and/or modify it
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7 under the terms of the GNU General Public License as published by the
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8 Free Software Foundation; either version 2, or (at your option) any
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9 later version.
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10
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11 XEmacs is distributed in the hope that it will be useful, but WITHOUT
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12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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14 for more details.
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15
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16 You should have received a copy of the GNU General Public License
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17 along with XEmacs; see the file COPYING. If not, write to
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18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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19 Boston, MA 02111-1307, USA. */
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20
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21 /* Synched up with: Not in FSF. */
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22
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23 #ifndef _XEMACS_ELHASH_H_
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24 #define _XEMACS_ELHASH_H_
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25
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26 DECLARE_LRECORD (hash_table, struct Lisp_Hash_Table);
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27
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28 #define XHASH_TABLE(x) XRECORD (x, hash_table, struct Lisp_Hash_Table)
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29 #define XSETHASH_TABLE(x, p) XSETRECORD (x, p, hash_table)
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30 #define HASH_TABLEP(x) RECORDP (x, hash_table)
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31 #define CHECK_HASH_TABLE(x) CHECK_RECORD (x, hash_table)
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32 #define CONCHECK_HASH_TABLE(x) CONCHECK_RECORD (x, hash_table)
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33
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34 enum hash_table_weakness
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35 {
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36 HASH_TABLE_NON_WEAK,
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37 HASH_TABLE_KEY_WEAK,
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38 HASH_TABLE_VALUE_WEAK,
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39 HASH_TABLE_KEY_CAR_WEAK,
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40 HASH_TABLE_VALUE_CAR_WEAK,
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41 HASH_TABLE_WEAK
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42 };
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43
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44 enum hash_table_test
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45 {
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46 HASH_TABLE_EQ,
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47 HASH_TABLE_EQL,
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48 HASH_TABLE_EQUAL
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49 };
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50
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51 extern const struct lrecord_description hash_table_description[];
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52
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53 EXFUN (Fcopy_hash_table, 1);
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54 EXFUN (Fhash_table_count, 1);
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55 EXFUN (Fgethash, 3);
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56 EXFUN (Fputhash, 3);
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57 EXFUN (Fremhash, 2);
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58 EXFUN (Fclrhash, 1);
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59
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60 typedef unsigned long hashcode_t;
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61 typedef int (*hash_table_test_function_t) (Lisp_Object obj1, Lisp_Object obj2);
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62 typedef unsigned long (*hash_table_hash_function_t) (Lisp_Object obj);
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63 typedef int (*maphash_function_t) (Lisp_Object key, Lisp_Object value,
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64 void* extra_arg);
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65
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66 struct Lisp_Hash_Table;
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67
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68 Lisp_Object make_general_lisp_hash_table (enum hash_table_test test,
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69 size_t size,
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70 double rehash_size,
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71 double rehash_threshold,
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72 enum hash_table_weakness weakness);
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73
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74 Lisp_Object make_lisp_hash_table (size_t size,
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75 enum hash_table_weakness weakness,
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76 enum hash_table_test test);
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77
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78 void elisp_maphash (maphash_function_t function,
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79 Lisp_Object hash_table, void *extra_arg);
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80
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81 void elisp_map_remhash (maphash_function_t predicate,
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82 Lisp_Object hash_table, void *extra_arg);
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83
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84 int finish_marking_weak_hash_tables (void);
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85 void prune_weak_hash_tables (void);
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86
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87 void reorganize_hash_table (struct Lisp_Hash_Table *ht);
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88
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89 #endif /* _XEMACS_ELHASH_H_ */
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