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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 : | jwilke | 1.19 | [IFUNDEF] allocate |
| 22 : | jwilke | 1.18 | : reserve-mem here swap allot ; |
| 23 : | \ move to a kernel/memory.fs | ||
| 24 : | [ELSE] | ||
| 25 : | : reserve-mem allocate throw ; | ||
| 26 : | [THEN] | ||
| 27 : | |||
| 28 : | [IFUNDEF] hashbits | ||
| 29 : | jwilke | 1.19 | 11 Value hashbits |
| 30 : | jwilke | 1.18 | [THEN] |
| 31 : | anton | 1.2 | 1 hashbits lshift Value Hashlen |
| 32 : | pazsan | 1.1 | |
| 33 : | jwilke | 1.18 | \ compute hash key 15jul94py |
| 34 : | |||
| 35 : | [IFUNDEF] hash | ||
| 36 : | : hash ( addr len -- key ) | ||
| 37 : | hashbits (hashkey1) ; | ||
| 38 : | [THEN] | ||
| 39 : | |||
| 40 : | pazsan | 1.1 | Variable insRule insRule on |
| 41 : | pazsan | 1.4 | Variable revealed |
| 42 : | pazsan | 1.1 | |
| 43 : | pazsan | 1.4 | \ Memory handling 10oct94py |
| 44 : | pazsan | 1.1 | |
| 45 : | Variable HashPointer | ||
| 46 : | pazsan | 1.4 | Variable HashIndex |
| 47 : | anton | 1.13 | 0 Value HashTable |
| 48 : | pazsan | 1.1 | |
| 49 : | jwilke | 1.18 | \ forward declarations |
| 50 : | 0 Value hashsearch-map | ||
| 51 : | Defer hash-alloc | ||
| 52 : | |||
| 53 : | pazsan | 1.4 | \ DelFix and NewFix are from bigFORTH 15jul94py |
| 54 : | pazsan | 1.1 | |
| 55 : | : DelFix ( addr root -- ) dup @ 2 pick ! ! ; | ||
| 56 : | : NewFix ( root len # -- addr ) | ||
| 57 : | jwilke | 1.18 | BEGIN 2 pick @ ?dup 0= WHILE 2dup * reserve-mem |
| 58 : | pazsan | 1.1 | over 0 ?DO dup 4 pick DelFix 2 pick + LOOP drop |
| 59 : | REPEAT >r drop r@ @ rot ! r@ swap erase r> ; | ||
| 60 : | |||
| 61 : | anton | 1.12 | : bucket ( addr len wordlist -- bucket-addr ) |
| 62 : | \ @var{bucket-addr} is the address of a cell that points to the first | ||
| 63 : | \ element in the list of the bucket for the string @var{addr len} | ||
| 64 : | wordlist-extend @ -rot hash xor ( bucket# ) | ||
| 65 : | anton | 1.13 | cells HashTable + ; |
| 66 : | anton | 1.2 | |
| 67 : | : hash-find ( addr len wordlist -- nfa / false ) | ||
| 68 : | anton | 1.12 | >r 2dup r> bucket @ (hashfind) ; |
| 69 : | pazsan | 1.1 | |
| 70 : | \ hash vocabularies 16jul94py | ||
| 71 : | |||
| 72 : | : lastlink! ( addr link -- ) | ||
| 73 : | BEGIN dup @ dup WHILE nip REPEAT drop ! ; | ||
| 74 : | |||
| 75 : | anton | 1.14 | : (reveal ( nfa wid -- ) |
| 76 : | anton | 1.12 | over name>string rot bucket >r |
| 77 : | HashPointer 2 Cells $400 NewFix | ||
| 78 : | tuck cell+ ! r> insRule @ | ||
| 79 : | IF | ||
| 80 : | dup @ 2 pick ! ! | ||
| 81 : | ELSE | ||
| 82 : | lastlink! | ||
| 83 : | THEN | ||
| 84 : | revealed on ; | ||
| 85 : | |||
| 86 : | anton | 1.14 | : hash-reveal ( nfa wid -- ) |
| 87 : | 2dup (reveal) (reveal ; | ||
| 88 : | pazsan | 1.1 | |
| 89 : | jwilke | 1.18 | : inithash ( wid -- ) |
| 90 : | wordlist-extend | ||
| 91 : | insRule @ >r insRule off hash-alloc 3 cells - dup | ||
| 92 : | BEGIN @ dup WHILE 2dup swap (reveal REPEAT | ||
| 93 : | 2drop r> insRule ! ; | ||
| 94 : | |||
| 95 : | pazsan | 1.4 | : addall ( -- ) |
| 96 : | voclink | ||
| 97 : | jwilke | 1.18 | BEGIN @ dup WHILE |
| 98 : | dup 0 wordlist-link - | ||
| 99 : | dup wordlist-map @ hashsearch-map = | ||
| 100 : | IF inithash ELSE drop THEN | ||
| 101 : | REPEAT drop ; | ||
| 102 : | pazsan | 1.4 | |
| 103 : | : clearhash ( -- ) | ||
| 104 : | anton | 1.13 | HashTable Hashlen cells bounds |
| 105 : | pazsan | 1.4 | DO I @ |
| 106 : | pazsan | 1.15 | BEGIN dup WHILE |
| 107 : | dup @ swap HashPointer DelFix | ||
| 108 : | pazsan | 1.4 | REPEAT I ! |
| 109 : | jwilke | 1.18 | cell +LOOP HashIndex off |
| 110 : | voclink | ||
| 111 : | BEGIN @ dup WHILE | ||
| 112 : | dup 0 wordlist-link - | ||
| 113 : | dup wordlist-map @ hashsearch-map = | ||
| 114 : | IF 0 swap wordlist-extend ! ELSE drop THEN | ||
| 115 : | REPEAT drop ; | ||
| 116 : | |||
| 117 : | : rehashall ( wid -- ) | ||
| 118 : | drop revealed @ | ||
| 119 : | IF clearhash addall revealed off | ||
| 120 : | THEN ; | ||
| 121 : | pazsan | 1.4 | |
| 122 : | jwilke | 1.18 | : (rehash) ( wid -- ) |
| 123 : | dup wordlist-extend @ 0= | ||
| 124 : | IF inithash | ||
| 125 : | ELSE rehashall THEN ; | ||
| 126 : | |||
| 127 : | \ >rom ?! | ||
| 128 : | align here ' hash-find A, ' hash-reveal A, ' (rehash) A, ' (rehash) A, | ||
| 129 : | to hashsearch-map | ||
| 130 : | pazsan | 1.4 | |
| 131 : | \ hash allocate and vocabulary initialization 10oct94py | ||
| 132 : | |||
| 133 : | jwilke | 1.18 | :noname ( hash-alloc ) ( addr -- addr ) |
| 134 : | HashTable 0= | ||
| 135 : | IF Hashlen cells reserve-mem TO HashTable | ||
| 136 : | HashTable Hashlen cells erase THEN | ||
| 137 : | pazsan | 1.4 | HashIndex @ over ! 1 HashIndex +! |
| 138 : | HashIndex @ Hashlen >= | ||
| 139 : | jwilke | 1.19 | [ [IFUNDEF] allocate ] |
| 140 : | jwilke | 1.18 | ABORT" no more space in hashtable" |
| 141 : | [ [ELSE] ] | ||
| 142 : | pazsan | 1.17 | IF HashTable >r clearhash |
| 143 : | pazsan | 1.4 | 1 hashbits 1+ dup to hashbits lshift to hashlen |
| 144 : | pazsan | 1.17 | r> free >r 0 to HashTable |
| 145 : | addall r> throw | ||
| 146 : | jwilke | 1.18 | THEN |
| 147 : | [ [THEN] ] ; is hash-alloc | ||
| 148 : | pazsan | 1.1 | |
| 149 : | \ Hash-Find 01jan93py | ||
| 150 : | jwilke | 1.19 | has? cross 0= |
| 151 : | jwilke | 1.18 | [IF] |
| 152 : | pazsan | 1.16 | : make-hash |
| 153 : | jwilke | 1.18 | hashsearch-map forth-wordlist cell+ ! |
| 154 : | addall ; | ||
| 155 : | make-hash \ Baumsuche ist installiert. | ||
| 156 : | [ELSE] | ||
| 157 : | hashsearch-map forth-wordlist cell+ ! | ||
| 158 : | [THEN] | ||
| 159 : | pazsan | 1.16 | |
| 160 : | jwilke | 1.18 | \ for ec version display that vocabulary goes hashed |
| 161 : | pazsan | 1.1 | |
| 162 : | jwilke | 1.18 | : hash-cold ( -- ) |
| 163 : | jwilke | 1.19 | [ has? ec [IF] ] ." Hashing..." [ [THEN] ] |
| 164 : | anton | 1.13 | HashPointer off 0 TO HashTable HashIndex off |
| 165 : | jwilke | 1.18 | addall |
| 166 : | \ voclink | ||
| 167 : | \ BEGIN @ dup WHILE | ||
| 168 : | \ dup 0 wordlist-link - initvoc | ||
| 169 : | \ REPEAT drop | ||
| 170 : | jwilke | 1.19 | [ has? ec [IF] ] ." Done" cr [ [THEN] ] ; |
| 171 : | jwilke | 1.18 | |
| 172 : | ' hash-cold INIT8 chained | ||
| 173 : | pazsan | 1.5 | |
| 174 : | pazsan | 1.1 | : .words ( -- ) |
| 175 : | anton | 1.13 | base @ >r hex HashTable Hashlen 0 |
| 176 : | pazsan | 1.4 | DO cr i 2 .r ." : " dup i cells + |
| 177 : | pazsan | 1.1 | BEGIN @ dup WHILE |
| 178 : | jwilke | 1.18 | dup cell+ @ head>string type space REPEAT drop |
| 179 : | pazsan | 1.1 | LOOP drop r> base ! ; |
| 180 : | |||
| 181 : | anton | 1.2 | \ \ this stuff is for evaluating the hash function |
| 182 : | \ : square dup * ; | ||
| 183 : | |||
| 184 : | \ : countwl ( -- sum sumsq ) | ||
| 185 : | pazsan | 1.4 | \ \ gives the number of words in the current wordlist |
| 186 : | \ \ and the sum of squares for the sublist lengths | ||
| 187 : | anton | 1.2 | \ 0 0 |
| 188 : | anton | 1.13 | \ hashtable Hashlen cells bounds DO |
| 189 : | pazsan | 1.4 | \ 0 i BEGIN |
| 190 : | \ @ dup WHILE | ||
| 191 : | \ swap 1+ swap | ||
| 192 : | \ REPEAT | ||
| 193 : | \ drop | ||
| 194 : | \ swap over square + | ||
| 195 : | \ >r + r> | ||
| 196 : | \ 1 cells | ||
| 197 : | \ +LOOP ; | ||
| 198 : | anton | 1.2 | |
| 199 : | \ : chisq ( -- n ) | ||
| 200 : | pazsan | 1.4 | \ \ n should have about the same size as Hashlen |
| 201 : | \ countwl Hashlen 2 pick */ swap - ; |
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