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| 1 : | pazsan | 1.1 | \ Hashed dictionaries 15jul94py |
| 2 : | |||
| 3 : | anton | 1.10 | \ Copyright (C) 1995 Free Software Foundation, Inc. |
| 4 : | |||
| 5 : | \ This file is part of Gforth. | ||
| 6 : | |||
| 7 : | \ Gforth is free software; you can redistribute it and/or | ||
| 8 : | \ modify it under the terms of the GNU General Public License | ||
| 9 : | \ as published by the Free Software Foundation; either version 2 | ||
| 10 : | \ of the License, or (at your option) any later version. | ||
| 11 : | |||
| 12 : | \ This program is distributed in the hope that it will be useful, | ||
| 13 : | \ but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
| 14 : | \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
| 15 : | \ GNU General Public License for more details. | ||
| 16 : | |||
| 17 : | \ You should have received a copy of the GNU General Public License | ||
| 18 : | \ along with this program; if not, write to the Free Software | ||
| 19 : | \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | ||
| 20 : | |||
| 21 : | anton | 1.9 | 11 value hashbits |
| 22 : | anton | 1.2 | 1 hashbits lshift Value Hashlen |
| 23 : | pazsan | 1.1 | |
| 24 : | Variable insRule insRule on | ||
| 25 : | pazsan | 1.4 | Variable revealed |
| 26 : | pazsan | 1.1 | |
| 27 : | pazsan | 1.4 | \ Memory handling 10oct94py |
| 28 : | pazsan | 1.1 | |
| 29 : | Variable HashPointer | ||
| 30 : | pazsan | 1.4 | Variable HashTable |
| 31 : | Variable HashIndex | ||
| 32 : | pazsan | 1.1 | |
| 33 : | pazsan | 1.4 | \ DelFix and NewFix are from bigFORTH 15jul94py |
| 34 : | pazsan | 1.1 | |
| 35 : | : DelFix ( addr root -- ) dup @ 2 pick ! ! ; | ||
| 36 : | : NewFix ( root len # -- addr ) | ||
| 37 : | BEGIN 2 pick @ ?dup 0= WHILE 2dup * allocate throw | ||
| 38 : | over 0 ?DO dup 4 pick DelFix 2 pick + LOOP drop | ||
| 39 : | REPEAT >r drop r@ @ rot ! r@ swap erase r> ; | ||
| 40 : | |||
| 41 : | \ compute hash key 15jul94py | ||
| 42 : | |||
| 43 : | anton | 1.2 | : hash ( addr len -- key ) |
| 44 : | hashbits (hashkey1) ; | ||
| 45 : | \ (hashkey) | ||
| 46 : | \ Hashlen 1- and ; | ||
| 47 : | pazsan | 1.1 | |
| 48 : | anton | 1.12 | : bucket ( addr len wordlist -- bucket-addr ) |
| 49 : | \ @var{bucket-addr} is the address of a cell that points to the first | ||
| 50 : | \ element in the list of the bucket for the string @var{addr len} | ||
| 51 : | wordlist-extend @ -rot hash xor ( bucket# ) | ||
| 52 : | cells HashTable @ + ; | ||
| 53 : | anton | 1.2 | |
| 54 : | : hash-find ( addr len wordlist -- nfa / false ) | ||
| 55 : | anton | 1.12 | >r 2dup r> bucket @ (hashfind) ; |
| 56 : | pazsan | 1.1 | |
| 57 : | \ hash vocabularies 16jul94py | ||
| 58 : | |||
| 59 : | : lastlink! ( addr link -- ) | ||
| 60 : | BEGIN dup @ dup WHILE nip REPEAT drop ! ; | ||
| 61 : | |||
| 62 : | anton | 1.12 | : (reveal ( addr voc -- ) |
| 63 : | dup wordlist-extend @ 0< | ||
| 64 : | IF | ||
| 65 : | 2drop EXIT | ||
| 66 : | THEN | ||
| 67 : | over name>string rot bucket >r | ||
| 68 : | HashPointer 2 Cells $400 NewFix | ||
| 69 : | tuck cell+ ! r> insRule @ | ||
| 70 : | IF | ||
| 71 : | dup @ 2 pick ! ! | ||
| 72 : | ELSE | ||
| 73 : | lastlink! | ||
| 74 : | THEN | ||
| 75 : | revealed on ; | ||
| 76 : | |||
| 77 : | : hash-reveal ( -- ) | ||
| 78 : | (reveal) last? | ||
| 79 : | IF | ||
| 80 : | current @ (reveal | ||
| 81 : | THEN ; | ||
| 82 : | pazsan | 1.1 | |
| 83 : | pazsan | 1.4 | : addall ( -- ) |
| 84 : | voclink | ||
| 85 : | BEGIN @ dup @ WHILE dup 'initvoc REPEAT drop ; | ||
| 86 : | |||
| 87 : | : clearhash ( -- ) | ||
| 88 : | HashTable @ Hashlen cells bounds | ||
| 89 : | DO I @ | ||
| 90 : | BEGIN dup WHILE | ||
| 91 : | dup @ swap HashPointer DelFix | ||
| 92 : | REPEAT I ! | ||
| 93 : | cell +LOOP HashIndex off ; | ||
| 94 : | |||
| 95 : | pazsan | 1.7 | : re-hash clearhash addall ; |
| 96 : | pazsan | 1.4 | : (rehash) ( addr -- ) |
| 97 : | pazsan | 1.7 | drop revealed @ IF re-hash revealed off THEN ; |
| 98 : | pazsan | 1.4 | |
| 99 : | anton | 1.12 | Create hashsearch-map ( -- wordlist-map ) |
| 100 : | ' hash-find A, ' hash-reveal A, ' (rehash) A, | ||
| 101 : | pazsan | 1.4 | |
| 102 : | \ hash allocate and vocabulary initialization 10oct94py | ||
| 103 : | |||
| 104 : | : hash-alloc ( addr -- addr ) HashTable @ 0= IF | ||
| 105 : | Hashlen cells allocate throw HashTable ! | ||
| 106 : | HashTable @ Hashlen cells erase THEN | ||
| 107 : | HashIndex @ over ! 1 HashIndex +! | ||
| 108 : | HashIndex @ Hashlen >= | ||
| 109 : | IF clearhash | ||
| 110 : | 1 hashbits 1+ dup to hashbits lshift to hashlen | ||
| 111 : | HashTable @ free | ||
| 112 : | addall | ||
| 113 : | THEN ; | ||
| 114 : | pazsan | 1.1 | |
| 115 : | pazsan | 1.4 | : (initvoc) ( addr -- ) |
| 116 : | anton | 1.2 | cell+ dup @ 0< IF drop EXIT THEN |
| 117 : | insRule @ >r insRule off hash-alloc | ||
| 118 : | anton | 1.12 | 3 cells - hashsearch-map over cell+ ! dup |
| 119 : | anton | 1.2 | BEGIN @ dup WHILE 2dup swap (reveal REPEAT |
| 120 : | 2drop r> insRule ! ; | ||
| 121 : | pazsan | 1.1 | |
| 122 : | pazsan | 1.4 | ' (initvoc) IS 'initvoc |
| 123 : | pazsan | 1.1 | |
| 124 : | \ Hash-Find 01jan93py | ||
| 125 : | |||
| 126 : | addall \ Baum aufbauen | ||
| 127 : | \ Baumsuche ist installiert. | ||
| 128 : | |||
| 129 : | pazsan | 1.5 | : hash-cold ( -- ) Defers 'cold |
| 130 : | HashPointer off HashTable off HashIndex off | ||
| 131 : | pazsan | 1.6 | voclink |
| 132 : | BEGIN @ dup @ WHILE | ||
| 133 : | dup cell - @ >r | ||
| 134 : | dup 'initvoc | ||
| 135 : | r> over cell - ! | ||
| 136 : | REPEAT drop ; | ||
| 137 : | pazsan | 1.5 | ' hash-cold IS 'cold |
| 138 : | |||
| 139 : | pazsan | 1.1 | : .words ( -- ) |
| 140 : | pazsan | 1.4 | base @ >r hex HashTable @ Hashlen 0 |
| 141 : | DO cr i 2 .r ." : " dup i cells + | ||
| 142 : | pazsan | 1.1 | BEGIN @ dup WHILE |
| 143 : | dup cell+ @ .name REPEAT drop | ||
| 144 : | LOOP drop r> base ! ; | ||
| 145 : | |||
| 146 : | anton | 1.2 | \ \ this stuff is for evaluating the hash function |
| 147 : | \ : square dup * ; | ||
| 148 : | |||
| 149 : | \ : countwl ( -- sum sumsq ) | ||
| 150 : | pazsan | 1.4 | \ \ gives the number of words in the current wordlist |
| 151 : | \ \ and the sum of squares for the sublist lengths | ||
| 152 : | anton | 1.2 | \ 0 0 |
| 153 : | pazsan | 1.4 | \ hashtable @ Hashlen cells bounds DO |
| 154 : | \ 0 i BEGIN | ||
| 155 : | \ @ dup WHILE | ||
| 156 : | \ swap 1+ swap | ||
| 157 : | \ REPEAT | ||
| 158 : | \ drop | ||
| 159 : | \ swap over square + | ||
| 160 : | \ >r + r> | ||
| 161 : | \ 1 cells | ||
| 162 : | \ +LOOP ; | ||
| 163 : | anton | 1.2 | |
| 164 : | \ : chisq ( -- n ) | ||
| 165 : | pazsan | 1.4 | \ \ n should have about the same size as Hashlen |
| 166 : | \ countwl Hashlen 2 pick */ swap - ; |
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