1 ! (c)2010 Joe Groff bsd license
2 USING: accessors assocs combinators.short-circuit fry
3 generalizations hash-sets hashtables kernel macros math
4 math.functions math.order sequences sets ;
5 FROM: sequences.private => nth-unsafe set-nth-unsafe ;
6 FROM: hashtables.private => tombstone? ;
10 ! basic cursor protocol
15 GENERIC: cursor-compatible? ( cursor cursor -- ? )
16 GENERIC: cursor-valid? ( cursor -- ? )
17 GENERIC: cursor= ( cursor cursor -- ? )
18 GENERIC: cursor<= ( cursor cursor -- ? )
19 GENERIC: cursor>= ( cursor cursor -- ? )
20 GENERIC: cursor-distance-hint ( cursor cursor -- n )
22 M: cursor cursor<= cursor= ; inline
23 M: cursor cursor>= cursor= ; inline
24 M: cursor cursor-distance-hint 2drop 0 ; inline
31 INSTANCE: forward-cursor cursor
33 GENERIC: inc-cursor ( cursor -- cursor' )
35 MIXIN: bidirectional-cursor
36 INSTANCE: bidirectional-cursor forward-cursor
38 GENERIC: dec-cursor ( cursor -- cursor' )
40 MIXIN: random-access-cursor
41 INSTANCE: random-access-cursor bidirectional-cursor
43 GENERIC# cursor+ 1 ( cursor n -- cursor' )
44 GENERIC# cursor- 1 ( cursor n -- cursor' )
45 GENERIC: cursor-distance ( cursor cursor -- n )
46 GENERIC: cursor< ( cursor cursor -- ? )
47 GENERIC: cursor> ( cursor cursor -- ? )
49 M: random-access-cursor inc-cursor 1 cursor+ ; inline
50 M: random-access-cursor dec-cursor -1 cursor+ ; inline
51 M: random-access-cursor cursor- neg cursor+ ; inline
52 M: random-access-cursor cursor<= { [ cursor= ] [ cursor< ] } 2|| ; inline
53 M: random-access-cursor cursor>= { [ cursor= ] [ cursor> ] } 2|| ; inline
54 M: random-access-cursor cursor-distance-hint cursor-distance ; inline
60 ERROR: invalid-cursor cursor ;
64 GENERIC: cursor-key-value ( cursor -- key value )
66 GENERIC: cursor-key-value-unsafe ( cursor -- key value )
68 M: input-cursor cursor-key-value-unsafe cursor-key-value ; inline
69 M: input-cursor cursor-key-value
70 dup cursor-valid? [ cursor-key-value-unsafe ] [ invalid-cursor ] if ; inline
72 : cursor-key ( cursor -- key ) cursor-key-value drop ;
73 : cursor-value ( cursor -- key ) cursor-key-value nip ;
75 : cursor-key-unsafe ( cursor -- key ) cursor-key-value-unsafe drop ;
76 : cursor-value-unsafe ( cursor -- key ) cursor-key-value-unsafe nip ;
84 GENERIC: set-cursor-value ( value cursor -- )
86 GENERIC: set-cursor-value-unsafe ( value cursor -- )
88 M: output-cursor set-cursor-value-unsafe set-cursor-value ; inline
89 M: output-cursor set-cursor-value
90 dup cursor-valid? [ set-cursor-value-unsafe ] [ invalid-cursor ] if ; inline
97 INSTANCE: stream-cursor forward-cursor
99 M: stream-cursor cursor-compatible? 2drop f ; inline
100 M: stream-cursor cursor-valid? drop t ; inline
101 M: stream-cursor cursor= 2drop f ; inline
103 MIXIN: infinite-stream-cursor
104 INSTANCE: infinite-stream-cursor stream-cursor
106 M: infinite-stream-cursor inc-cursor ; inline
108 MIXIN: finite-stream-cursor
109 INSTANCE: finite-stream-cursor stream-cursor
111 SINGLETON: end-of-stream
113 GENERIC: cursor-stream-ended? ( cursor -- ? )
115 M: finite-stream-cursor inc-cursor
116 dup cursor-stream-ended? [ drop end-of-stream ] when ; inline
118 INSTANCE: end-of-stream finite-stream-cursor
120 M: end-of-stream cursor-compatible? drop finite-stream-cursor? ; inline
121 M: end-of-stream cursor-valid? drop f ; inline
122 M: end-of-stream cursor= eq? ; inline
123 M: end-of-stream inc-cursor ; inline
124 M: end-of-stream cursor-stream-ended? drop t ; inline
130 : -each ( ... begin end quot: ( ... cursor -- ... ) -- ... )
131 [ '[ dup _ cursor>= ] ]
132 [ '[ _ keep inc-cursor ] ] bi* until drop ; inline
134 : -find ( ... begin end quot: ( ... cursor -- ... ? ) -- ... cursor )
135 '[ dup _ cursor>= [ t ] [ dup @ ] if ] [ inc-cursor ] until ; inline
137 : -in- ( quot -- quot' )
138 '[ cursor-value-unsafe @ ] ; inline
140 : -out- ( quot -- quot' )
141 '[ _ keep set-cursor-value-unsafe ] ; inline
143 : -out ( ... begin end quot: ( ... cursor -- ... value ) -- ... )
150 TUPLE: numeric-cursor
151 { value read-only } ;
153 M: numeric-cursor cursor-valid? drop t ; inline
155 M: numeric-cursor cursor= [ value>> ] bi@ = ; inline
157 M: numeric-cursor cursor<= [ value>> ] bi@ <= ; inline
158 M: numeric-cursor cursor< [ value>> ] bi@ < ; inline
159 M: numeric-cursor cursor> [ value>> ] bi@ > ; inline
160 M: numeric-cursor cursor>= [ value>> ] bi@ >= ; inline
162 INSTANCE: numeric-cursor input-cursor
164 M: numeric-cursor cursor-key-value value>> dup ; inline
170 TUPLE: linear-cursor < numeric-cursor
171 { delta read-only } ;
172 C: <linear-cursor> linear-cursor
174 INSTANCE: linear-cursor random-access-cursor
176 M: linear-cursor cursor-compatible?
177 [ linear-cursor? ] both? ; inline
179 M: linear-cursor inc-cursor
180 [ value>> ] [ delta>> ] bi [ + ] keep <linear-cursor> ; inline
181 M: linear-cursor dec-cursor
182 [ value>> ] [ delta>> ] bi [ - ] keep <linear-cursor> ; inline
183 M: linear-cursor cursor+
184 [ [ value>> ] [ delta>> ] bi ] dip [ * + ] keep <linear-cursor> ; inline
185 M: linear-cursor cursor-
186 [ [ value>> ] [ delta>> ] bi ] dip [ * - ] keep <linear-cursor> ; inline
188 GENERIC: up/i ( distance delta -- distance' )
189 M: integer up/i [ 1 - + ] keep /i ; inline
190 M: real up/i / ceiling >integer ; inline
192 M: linear-cursor cursor-distance
193 [ [ value>> ] bi@ - ] [ nip delta>> ] 2bi up/i ; inline
199 TUPLE: quadratic-cursor < numeric-cursor
201 { delta2 read-only } ;
203 C: <quadratic-cursor> quadratic-cursor
205 INSTANCE: quadratic-cursor bidirectional-cursor
207 M: quadratic-cursor cursor-compatible?
208 [ linear-cursor? ] both? ; inline
210 M: quadratic-cursor inc-cursor
211 [ value>> ] [ delta>> [ + ] keep ] [ delta2>> [ + ] keep ] tri <quadratic-cursor> ; inline
213 M: quadratic-cursor dec-cursor
214 [ value>> ] [ delta>> ] [ delta2>> ] tri [ - [ - ] keep ] keep <quadratic-cursor> ; inline
222 GENERIC: begin-cursor ( collection -- cursor )
223 GENERIC: end-cursor ( collection -- cursor )
225 : all ( collection -- begin end )
226 [ begin-cursor ] [ end-cursor ] bi ; inline
228 : all- ( collection quot -- begin end quot )
236 INSTANCE: container collection
238 : in- ( container quot -- begin end quot' )
241 : each ( ... container quot: ( ... x -- ... ) -- ... ) in- -each ; inline
243 INSTANCE: finite-stream-cursor container
245 M: finite-stream-cursor begin-cursor ; inline
246 M: finite-stream-cursor end-cursor drop end-of-stream ; inline
252 TUPLE: sequence-cursor
254 { n fixnum read-only } ;
255 C: <sequence-cursor> sequence-cursor
257 INSTANCE: sequence container
259 M: sequence begin-cursor 0 <sequence-cursor> ; inline
260 M: sequence end-cursor dup length <sequence-cursor> ; inline
262 INSTANCE: sequence-cursor random-access-cursor
264 M: sequence-cursor cursor-compatible?
266 [ [ sequence-cursor? ] both? ]
267 [ [ seq>> ] bi@ eq? ]
270 M: sequence-cursor cursor-valid?
271 [ n>> ] [ seq>> ] bi bounds-check? ; inline
273 M: sequence-cursor cursor= [ n>> ] bi@ = ; inline
274 M: sequence-cursor cursor<= [ n>> ] bi@ <= ; inline
275 M: sequence-cursor cursor>= [ n>> ] bi@ >= ; inline
276 M: sequence-cursor cursor< [ n>> ] bi@ < ; inline
277 M: sequence-cursor cursor> [ n>> ] bi@ > ; inline
278 M: sequence-cursor inc-cursor [ seq>> ] [ n>> ] bi 1 + <sequence-cursor> ; inline
279 M: sequence-cursor dec-cursor [ seq>> ] [ n>> ] bi 1 - <sequence-cursor> ; inline
280 M: sequence-cursor cursor+ [ [ seq>> ] [ n>> ] bi ] dip + <sequence-cursor> ; inline
281 M: sequence-cursor cursor- [ [ seq>> ] [ n>> ] bi ] dip - <sequence-cursor> ; inline
282 M: sequence-cursor cursor-distance ( cursor cursor -- n )
283 [ n>> ] bi@ - ; inline
285 INSTANCE: sequence-cursor input-cursor
287 M: sequence-cursor cursor-key-value-unsafe [ n>> dup ] [ seq>> ] bi nth-unsafe ; inline
288 M: sequence-cursor cursor-key-value [ n>> dup ] [ seq>> ] bi nth ; inline
290 INSTANCE: sequence-cursor output-cursor
292 M: sequence-cursor set-cursor-value-unsafe [ n>> ] [ seq>> ] bi set-nth-unsafe ; inline
293 M: sequence-cursor set-cursor-value [ n>> ] [ seq>> ] bi set-nth ; inline
299 TUPLE: hash-set-cursor
300 { hash-set hash-set read-only }
301 { n fixnum read-only } ;
303 C: <hash-set-cursor> hash-set-cursor
306 INSTANCE: hash-set-cursor forward-cursor
308 M: hash-set-cursor cursor-compatible?
310 [ [ hash-set-cursor? ] both? ]
311 [ [ hash-set>> ] bi@ eq? ]
314 M: hash-set-cursor cursor-valid? ( cursor -- ? )
315 [ n>> ] [ hash-set>> array>> ] bi bounds-check? ; inline
317 M: hash-set-cursor cursor= ( cursor cursor -- ? )
318 [ n>> ] bi@ = ; inline
319 M: hash-set-cursor cursor-distance-hint ( cursor cursor -- n )
320 nip hash-set>> cardinality ; inline
323 : (inc-hash-set-cursor) ( array n -- n' )
324 [ 2dup swap { [ length < ] [ nth-unsafe tombstone? ] } 2&& ] [ 1 + ] while nip ; inline
327 M: hash-set-cursor inc-cursor ( cursor -- cursor' )
328 [ hash-set>> dup array>> ] [ n>> 1 + ] bi
329 (inc-hash-set-cursor) <hash-set-cursor> ; inline
331 INSTANCE: hash-set-cursor input-cursor
333 M: hash-set-cursor cursor-key-value-unsafe
334 [ n>> dup ] [ hash-set>> array>> ] bi nth-unsafe ; inline
336 INSTANCE: hash-set container
338 M: hash-set begin-cursor
339 dup array>> 0 (inc-hash-set-cursor) <hash-set-cursor> ; inline
340 M: hash-set end-cursor
341 dup array>> length <hash-set-cursor> ; inline
350 C: <map-cursor> map-cursor
352 INSTANCE: map-cursor forward-cursor
354 M: map-cursor cursor-compatible? [ from>> ] bi@ cursor-compatible? ; inline
355 M: map-cursor cursor-valid? [ from>> ] [ to>> ] bi [ cursor-valid? ] both? ; inline
356 M: map-cursor cursor= [ from>> ] bi@ cursor= ; inline
357 M: map-cursor inc-cursor [ from>> inc-cursor ] [ to>> inc-cursor ] bi <map-cursor> ; inline
359 INSTANCE: map-cursor output-cursor
361 M: map-cursor set-cursor-value-unsafe to>> set-cursor-value-unsafe ; inline
362 M: map-cursor set-cursor-value to>> set-cursor-value ; inline
364 : -map- ( begin end quot to -- begin' end' quot' )
365 swap [ '[ _ <map-cursor> ] bi@ ] dip '[ from>> @ ] -out- ; inline
367 : -map ( begin end quot to -- begin' end' quot' )
375 { growable read-only } ;
376 C: <pusher-cursor> pusher-cursor
378 INSTANCE: pusher-cursor infinite-stream-cursor
379 INSTANCE: pusher-cursor output-cursor
381 M: pusher-cursor set-cursor-value growable>> push ; inline
384 ! Create cursors into new sequences
387 : new-growable-cursor ( begin end exemplar -- cursor result )
388 [ swap cursor-distance-hint ] dip new-resizable [ <pusher-cursor> ] keep ; inline
390 GENERIC# new-sequence-cursor 1 ( begin end exemplar -- cursor result )
392 M: random-access-cursor new-sequence-cursor
393 [ swap cursor-distance ] dip new-sequence [ begin-cursor ] keep ; inline
394 M: forward-cursor new-sequence-cursor
395 new-growable-cursor ; inline
397 : -into-sequence- ( begin end quot exemplar -- begin' end' quot' cursor result )
398 [ 2over ] dip new-sequence-cursor ; inline
400 : -into-growable- ( begin end quot exemplar -- begin' end' quot' cursor result )
401 [ 2over ] dip new-growable-cursor ; inline
407 ! XXX generalize exemplar
408 : -map-as ( ... begin end quot: ( ... cursor -- ... value ) exemplar -- ... newseq )
409 [ -into-sequence- [ -map ] dip ] keep like ; inline
411 : map! ( ... container quot: ( ... x -- ... newx ) -- ... container )
412 [ in- -out ] keep ; inline
413 : map-as ( ... container quot: ( ... x -- ... newx ) exemplar -- ... newseq )
414 [ in- ] dip -map-as ; inline
415 : map ( ... container quot: ( ... x -- ... newx ) -- ... newcontainer )
422 : -assoc- ( quot -- quot' )
423 '[ cursor-key-value @ ] ; inline
425 : assoc- ( assoc quot -- begin end quot' )
426 all- -assoc- ; inline
428 : assoc-each ( ... assoc quot: ( ... k v -- ... ) -- ... )
429 assoc- -each ; inline
430 : assoc>map ( ... assoc quot: ( ... k v -- ... newx ) exemplar -- ... newcontainer )
431 [ assoc- ] dip -map-as ; inline
437 TUPLE: hashtable-cursor
438 { hashtable hashtable read-only }
439 { n fixnum read-only } ;
441 C: <hashtable-cursor> hashtable-cursor
444 INSTANCE: hashtable-cursor forward-cursor
446 M: hashtable-cursor cursor-compatible?
448 [ [ hashtable-cursor? ] both? ]
449 [ [ hashtable>> ] bi@ eq? ]
452 M: hashtable-cursor cursor-valid? ( cursor -- ? )
453 [ n>> ] [ hashtable>> array>> ] bi bounds-check? ; inline
455 M: hashtable-cursor cursor= ( cursor cursor -- ? )
456 [ n>> ] bi@ = ; inline
457 M: hashtable-cursor cursor-distance-hint ( cursor cursor -- n )
458 nip hashtable>> assoc-size ; inline
461 : (inc-hashtable-cursor) ( array n -- n' )
462 [ 2dup swap { [ length < ] [ nth-unsafe tombstone? ] } 2&& ] [ 2 + ] while nip ; inline
465 M: hashtable-cursor inc-cursor ( cursor -- cursor' )
466 [ hashtable>> dup array>> ] [ n>> 2 + ] bi
467 (inc-hashtable-cursor) <hashtable-cursor> ; inline
469 INSTANCE: hashtable-cursor input-cursor
471 M: hashtable-cursor cursor-key-value-unsafe
472 [ n>> ] [ hashtable>> array>> ] bi
473 [ nth-unsafe ] [ [ 1 + ] dip nth-unsafe ] 2bi ; inline
475 INSTANCE: hashtable container
477 M: hashtable begin-cursor
478 dup array>> 0 (inc-hashtable-cursor) <hashtable-cursor> ; inline
479 M: hashtable end-cursor
480 dup array>> length <hashtable-cursor> ; inline
488 { values read-only } ;
489 C: <zip-cursor> zip-cursor
491 INSTANCE: zip-cursor forward-cursor
493 M: zip-cursor cursor-compatible? ( cursor cursor -- ? )
495 [ [ zip-cursor? ] both? ]
496 [ [ keys>> ] bi@ cursor-compatible? ]
497 [ [ values>> ] bi@ cursor-compatible? ]
500 M: zip-cursor cursor-valid? ( cursor -- ? )
501 [ keys>> ] [ values>> ] bi [ cursor-valid? ] both? ; inline
502 M: zip-cursor cursor= ( cursor cursor -- ? )
504 [ [ keys>> ] bi@ cursor= ]
505 [ [ values>> ] bi@ cursor= ]
508 M: zip-cursor cursor-distance-hint ( cursor cursor -- n )
509 [ [ keys>> ] bi@ cursor-distance-hint ]
510 [ [ values>> ] bi@ cursor-distance-hint ] 2bi max ; inline
512 M: zip-cursor inc-cursor ( cursor -- cursor' )
513 [ keys>> inc-cursor ] [ values>> inc-cursor ] bi <zip-cursor> ; inline
515 INSTANCE: zip-cursor input-cursor
517 M: zip-cursor cursor-key-value
518 [ keys>> cursor-value-unsafe ] [ values>> cursor-value-unsafe ] bi ; inline
520 : zip-cursors ( a-begin a-end b-begin b-end -- begin end )
521 [ <zip-cursor> ] bi-curry@ bi* ; inline
523 : 2all ( a b -- begin end )
524 [ all ] bi@ zip-cursors ; inline
526 : 2all- ( a b quot -- begin end quot )
527 [ 2all ] dip ; inline
531 : 2in- ( a b quot -- begin end quot' )
534 : 2each ( ... a b quot: ( ... x y -- ... ) -- ... )
537 : 2map-as ( ... a b quot: ( ... x y -- ... z ) exemplar -- ... c )
538 [ 2in- ] dip -map-as ; inline
540 : 2map ( ... a b quot: ( ... x y -- ... z ) -- ... c )
541 pick 2map-as ; inline
547 : -unzip- ( quot -- quot' )
548 '[ [ keys>> cursor-value-unsafe ] [ values>> ] bi @ ] ; inline
550 MACRO: nzip-cursors ( n -- ) 1 - [ zip-cursors ] n*quot ;
552 : nall ( seqs... n -- begin end ) [ [ all ] swap napply ] [ nzip-cursors ] bi ; inline
554 : nall- ( seqs... quot n -- begin end quot ) swap [ nall ] dip ; inline
556 MACRO: -nin- ( n -- )
557 1 - [ -unzip- ] n*quot [ -in- ] prepend ;
559 : nin- ( seqs... quot n -- begin end quot ) [ nall- ] [ -nin- ] bi ; inline
561 : neach ( seqs... quot n -- ) nin- -each ; inline
562 : nmap-as ( seqs... quot exemplar n -- newseq )
563 swap [ nin- ] dip -map-as ; inline
564 : nmap ( seqs... quot n -- newseq )
565 dup [ npick ] curry [ dip swap ] curry dip nmap-as ; inline
571 : -with- ( invariant begin end quot -- begin end quot' )
572 [ rot ] dip '[ [ _ ] dip @ ] ; inline
574 : -2with- ( invariant invariant begin end quot -- begin end quot' )
575 -with- -with- ; inline
577 MACRO: -nwith- ( n -- )