Annotation of gforth/kernal.fs, revision 1.59
1.43 anton 1: \ KERNAL.FS GForth kernal 17dec92py
1.46 anton 2:
3: \ 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:
1.1 anton 21: \ Idea and implementation: Bernd Paysan (py)
22:
23: \ Log: ', '- usw. durch [char] ... ersetzt
24: \ man sollte die unterschiedlichen zahlensysteme
25: \ mit $ und & zumindest im interpreter weglassen
26: \ schon erledigt!
27: \ 11may93jaw
28: \ name> 0= nicht vorhanden 17may93jaw
29: \ nfa can be lfa or nfa!
30: \ find splited into find and (find)
31: \ (find) for later use 17may93jaw
32: \ search replaced by lookup because
33: \ it is a word of the string wordset
34: \ 20may93jaw
35: \ postpone added immediate 21may93jaw
36: \ to added immediate 07jun93jaw
37: \ cfa, header put "here lastcfa !" in
38: \ cfa, this is more logical
39: \ and noname: works wothout
40: \ extra "here lastcfa !" 08jun93jaw
41: \ (parse-white) thrown out
42: \ refill added outer trick
43: \ to show there is something
44: \ going on 09jun93jaw
45: \ leave ?leave somebody forgot UNLOOP!!! 09jun93jaw
46: \ leave ?leave unloop thrown out
47: \ unloop after loop is used 10jun93jaw
48:
49: HEX
50:
1.41 anton 51: \ labels for some code addresses
52:
53: : docon: ( -- addr ) \ gforth
54: \ the code address of a @code{CONSTANT}
55: ['] bl >code-address ;
56:
57: : docol: ( -- addr ) \ gforth
58: \ the code address of a colon definition
59: ['] docon: >code-address ;
60:
61: : dovar: ( -- addr ) \ gforth
62: \ the code address of a @code{CREATE}d word
63: ['] udp >code-address ;
64:
65: : douser: ( -- addr ) \ gforth
66: \ the code address of a @code{USER} variable
67: ['] s0 >code-address ;
68:
69: : dodefer: ( -- addr ) \ gforth
70: \ the code address of a @code{defer}ed word
71: ['] source >code-address ;
72:
73: : dofield: ( -- addr ) \ gforth
74: \ the code address of a @code{field}
75: ['] reveal-method >code-address ;
76:
1.1 anton 77: \ Bit string manipulation 06oct92py
78:
1.51 anton 79: \ Create bits 80 c, 40 c, 20 c, 10 c, 8 c, 4 c, 2 c, 1 c,
80: \ DOES> ( n -- ) + c@ ;
1.1 anton 81:
1.51 anton 82: \ : >bit ( addr n -- c-addr mask ) 8 /mod rot + swap bits ;
83: \ : +bit ( addr n -- ) >bit over c@ or swap c! ;
1.1 anton 84:
1.51 anton 85: \ : relinfo ( -- addr ) forthstart dup @ + !!bug!! ;
86: \ : >rel ( addr -- n ) forthstart - ;
87: \ : relon ( addr -- ) relinfo swap >rel cell / +bit ;
1.1 anton 88:
89: \ here allot , c, A, 17dec92py
90:
1.42 anton 91: : dp ( -- addr ) \ gforth
92: dpp @ ;
93: : here ( -- here ) \ core
94: dp @ ;
95: : allot ( n -- ) \ core
96: dp +! ;
97: : c, ( c -- ) \ core
98: here 1 chars allot c! ;
99: : , ( x -- ) \ core
100: here cell allot ! ;
101: : 2, ( w1 w2 -- ) \ gforth
1.1 anton 102: here 2 cells allot 2! ;
103:
1.45 pazsan 104: \ : aligned ( addr -- addr' ) \ core
105: \ [ cell 1- ] Literal + [ -1 cells ] Literal and ;
1.42 anton 106: : align ( -- ) \ core
107: here dup aligned swap ?DO bl c, LOOP ;
1.1 anton 108:
1.45 pazsan 109: \ : faligned ( addr -- f-addr ) \ float
110: \ [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
1.8 anton 111:
1.42 anton 112: : falign ( -- ) \ float
113: here dup faligned swap
114: ?DO
115: bl c,
116: LOOP ;
1.8 anton 117:
1.28 anton 118: \ !! this is machine-dependent, but works on all but the strangest machines
1.42 anton 119: ' faligned Alias maxaligned ( addr1 -- addr2 ) \ gforth
120: ' falign Alias maxalign ( -- ) \ gforth
1.28 anton 121:
1.42 anton 122: \ !! machine-dependent and won't work if "0 >body" <> "0 >body maxaligned"
123: ' maxaligned Alias cfaligned ( addr1 -- addr2 ) \ gforth
1.28 anton 124: \ the code field is aligned if its body is maxaligned
1.42 anton 125: ' maxalign Alias cfalign ( -- ) \ gforth
126:
127: : chars ( n1 -- n2 ) \ core
128: ; immediate
1.28 anton 129:
1.8 anton 130:
1.51 anton 131: \ : A! ( addr1 addr2 -- ) \ gforth
132: \ dup relon ! ;
133: \ : A, ( addr -- ) \ gforth
134: \ here cell allot A! ;
135: ' ! alias A! ( addr1 addr2 -- ) \ gforth
136: ' , alias A, ( addr -- ) \ gforth
137:
1.1 anton 138:
139: \ on off 23feb93py
140:
1.42 anton 141: : on ( addr -- ) \ gforth
142: true swap ! ;
143: : off ( addr -- ) \ gforth
144: false swap ! ;
1.1 anton 145:
146: \ name> found 17dec92py
147:
1.59 ! anton 148: $80 constant alias-mask \ set when the word is not an alias!
! 149: $40 constant immediate-mask
! 150: $20 constant restrict-mask
! 151:
1.50 anton 152: : (name>) ( nfa+cell -- cfa )
153: 1 cells - name>string + cfaligned ;
1.42 anton 154: : name> ( nfa -- cfa ) \ gforth
1.28 anton 155: cell+
1.59 ! anton 156: dup (name>) swap c@ alias-mask and 0= IF @ THEN ;
1.1 anton 157:
1.42 anton 158: : found ( nfa -- cfa n ) \ gforth
159: cell+
1.59 ! anton 160: dup c@ >r (name>) r@ alias-mask and 0= IF @ THEN
! 161: -1 r@ restrict-mask and IF 1- THEN
! 162: r> immediate-mask and IF negate THEN ;
1.1 anton 163:
164: \ (find) 17dec92py
165:
166: \ : (find) ( addr count nfa1 -- nfa2 / false )
167: \ BEGIN dup WHILE dup >r
1.50 anton 168: \ name>string dup >r 2over r> =
1.1 anton 169: \ IF -text 0= IF 2drop r> EXIT THEN
170: \ ELSE 2drop drop THEN r> @
171: \ REPEAT nip nip ;
172:
173: \ place bounds 13feb93py
174:
1.42 anton 175: : place ( addr len to -- ) \ gforth
176: over >r rot over 1+ r> move c! ;
177: : bounds ( beg count -- end beg ) \ gforth
178: over + swap ;
1.1 anton 179:
180: \ input stream primitives 23feb93py
181:
1.42 anton 182: : tib ( -- c-addr ) \ core-ext
183: \ obsolescent
184: >tib @ ;
185: Defer source ( -- addr count ) \ core
186: \ used by dodefer:, must be defer
187: : (source) ( -- addr count )
188: tib #tib @ ;
1.1 anton 189: ' (source) IS source
190:
191: \ (word) 22feb93py
192:
1.42 anton 193: : scan ( addr1 n1 char -- addr2 n2 ) \ gforth
1.19 anton 194: \ skip all characters not equal to char
195: >r
196: BEGIN
197: dup
198: WHILE
199: over c@ r@ <>
200: WHILE
201: 1 /string
202: REPEAT THEN
203: rdrop ;
1.42 anton 204: : skip ( addr1 n1 char -- addr2 n2 ) \ gforth
1.19 anton 205: \ skip all characters equal to char
206: >r
207: BEGIN
208: dup
209: WHILE
210: over c@ r@ =
211: WHILE
212: 1 /string
213: REPEAT THEN
214: rdrop ;
1.1 anton 215:
216: : (word) ( addr1 n1 char -- addr2 n2 )
217: dup >r skip 2dup r> scan nip - ;
218:
219: \ (word) should fold white spaces
220: \ this is what (parse-white) does
221:
222: \ word parse 23feb93py
223:
1.42 anton 224: : parse-word ( char -- addr len ) \ gforth
1.35 anton 225: source 2dup >r >r >in @ over min /string
1.1 anton 226: rot dup bl = IF drop (parse-white) ELSE (word) THEN
227: 2dup + r> - 1+ r> min >in ! ;
1.42 anton 228: : word ( char -- addr ) \ core
1.1 anton 229: parse-word here place bl here count + c! here ;
230:
1.42 anton 231: : parse ( char -- addr len ) \ core-ext
1.35 anton 232: >r source >in @ over min /string over swap r> scan >r
1.1 anton 233: over - dup r> IF 1+ THEN >in +! ;
234:
235: \ name 13feb93py
236:
1.42 anton 237: : capitalize ( addr len -- addr len ) \ gforth
1.20 pazsan 238: 2dup chars chars bounds
1.1 anton 239: ?DO I c@ toupper I c! 1 chars +LOOP ;
1.20 pazsan 240: : (name) ( -- c-addr count )
1.15 anton 241: source 2dup >r >r >in @ /string (parse-white)
242: 2dup + r> - 1+ r> min >in ! ;
243: \ name count ;
1.1 anton 244:
1.35 anton 245: : name-too-short? ( c-addr u -- c-addr u )
246: dup 0= -&16 and throw ;
247:
248: : name-too-long? ( c-addr u -- c-addr u )
249: dup $1F u> -&19 and throw ;
250:
1.1 anton 251: \ Literal 17dec92py
252:
1.43 anton 253: : Literal ( compilation n -- ; run-time -- n ) \ core
1.58 anton 254: postpone lit , ; immediate restrict
1.43 anton 255: : ALiteral ( compilation addr -- ; run-time -- addr ) \ gforth
1.58 anton 256: postpone lit A, ; immediate restrict
1.1 anton 257:
1.42 anton 258: : char ( 'char' -- n ) \ core
259: bl word char+ c@ ;
1.43 anton 260: : [char] ( compilation 'char' -- ; run-time -- n )
1.58 anton 261: char postpone Literal ; immediate restrict
1.1 anton 262:
1.42 anton 263: : (compile) ( -- ) \ gforth
264: r> dup cell+ >r @ compile, ;
265: : postpone ( "name" -- ) \ core
1.20 pazsan 266: name sfind dup 0= abort" Can't compile "
1.22 anton 267: 0> IF compile, ELSE postpone (compile) A, THEN ;
1.1 anton 268: immediate restrict
269:
270: \ Use (compile) for the old behavior of compile!
271:
272: \ digit? 17dec92py
273:
1.42 anton 274: : digit? ( char -- digit true/ false ) \ gforth
1.8 anton 275: base @ $100 =
276: IF
277: true EXIT
278: THEN
1.1 anton 279: toupper [char] 0 - dup 9 u> IF
280: [ 'A '9 1 + - ] literal -
281: dup 9 u<= IF
282: drop false EXIT
283: THEN
284: THEN
285: dup base @ u>= IF
286: drop false EXIT
287: THEN
288: true ;
289:
290: : accumulate ( +d0 addr digit - +d1 addr )
291: swap >r swap base @ um* drop rot base @ um* d+ r> ;
1.42 anton 292:
293: : >number ( d addr count -- d addr count ) \ core
294: 0
295: ?DO
296: count digit?
297: WHILE
298: accumulate
299: LOOP
300: 0
301: ELSE
302: 1- I' I -
303: UNLOOP
304: THEN ;
1.1 anton 305:
306: \ number? number 23feb93py
307:
308: Create bases 10 , 2 , A , 100 ,
309: \ 16 2 10 Zeichen
310: \ !! this saving and restoring base is an abomination! - anton
1.42 anton 311: : getbase ( addr u -- addr' u' )
312: over c@ [char] $ - dup 4 u<
313: IF
314: cells bases + @ base ! 1 /string
315: ELSE
316: drop
317: THEN ;
318: : s>number ( addr len -- d )
319: base @ >r dpl on
320: over c@ '- = dup >r
321: IF
322: 1 /string
323: THEN
324: getbase dpl on 0 0 2swap
325: BEGIN
326: dup >r >number dup
327: WHILE
328: dup r> -
329: WHILE
330: dup dpl ! over c@ [char] . =
331: WHILE
332: 1 /string
333: REPEAT THEN
334: 2drop rdrop dpl off
335: ELSE
336: 2drop rdrop r>
337: IF
338: dnegate
339: THEN
340: THEN
341: r> base ! ;
342:
1.15 anton 343: : snumber? ( c-addr u -- 0 / n -1 / d 0> )
344: s>number dpl @ 0=
345: IF
346: 2drop false EXIT
347: THEN
348: dpl @ dup 0> 0= IF
349: nip
350: THEN ;
1.12 pazsan 351: : number? ( string -- string 0 / n -1 / d 0> )
1.15 anton 352: dup >r count snumber? dup if
353: rdrop
354: else
355: r> swap
356: then ;
1.42 anton 357: : s>d ( n -- d ) \ core s-to-d
358: dup 0< ;
1.1 anton 359: : number ( string -- d )
1.42 anton 360: number? ?dup 0= abort" ?" 0<
361: IF
362: s>d
363: THEN ;
1.1 anton 364:
365: \ space spaces ud/mod 21mar93py
366: decimal
1.42 anton 367: Create spaces ( u -- ) \ core
368: bl 80 times \ times from target compiler! 11may93jaw
369: DOES> ( u -- )
370: swap
371: 0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ;
372: Create backspaces
373: 08 80 times \ times from target compiler! 11may93jaw
374: DOES> ( u -- )
375: swap
376: 0 max 0 ?DO I' I - &80 min 2dup type +LOOP drop ;
1.1 anton 377: hex
1.42 anton 378: : space ( -- ) \ core
379: 1 spaces ;
1.1 anton 380:
1.42 anton 381: : ud/mod ( ud1 u2 -- urem udquot ) \ gforth
382: >r 0 r@ um/mod r> swap >r
383: um/mod r> ;
1.1 anton 384:
1.43 anton 385: : pad ( -- addr ) \ core-ext
1.1 anton 386: here [ $20 8 2* cells + 2 + cell+ ] Literal + aligned ;
387:
388: \ hold <# #> sign # #s 25jan92py
389:
1.42 anton 390: : hold ( char -- ) \ core
391: pad cell - -1 chars over +! @ c! ;
1.1 anton 392:
1.42 anton 393: : <# ( -- ) \ core less-number-sign
394: pad cell - dup ! ;
1.1 anton 395:
1.42 anton 396: : #> ( xd -- addr u ) \ core number-sign-greater
397: 2drop pad cell - dup @ tuck - ;
1.1 anton 398:
1.42 anton 399: : sign ( n -- ) \ core
400: 0< IF [char] - hold THEN ;
1.1 anton 401:
1.42 anton 402: : # ( ud1 -- ud2 ) \ core number-sign
403: base @ 2 max ud/mod rot 9 over <
404: IF
405: [ char A char 9 - 1- ] Literal +
406: THEN
407: [char] 0 + hold ;
1.1 anton 408:
1.42 anton 409: : #s ( +d -- 0 0 ) \ core number-sign-s
410: BEGIN
411: # 2dup d0=
412: UNTIL ;
1.1 anton 413:
414: \ print numbers 07jun92py
415:
1.42 anton 416: : d.r ( d n -- ) \ double d-dot-r
417: >r tuck dabs <# #s rot sign #>
418: r> over - spaces type ;
419:
420: : ud.r ( ud n -- ) \ gforth u-d-dot-r
421: >r <# #s #> r> over - spaces type ;
422:
423: : .r ( n1 n2 -- ) \ core-ext dot-r
424: >r s>d r> d.r ;
425: : u.r ( u n -- ) \ core-ext u-dot-r
426: 0 swap ud.r ;
427:
428: : d. ( d -- ) \ double d-dot
429: 0 d.r space ;
430: : ud. ( ud -- ) \ gforth u-d-dot
431: 0 ud.r space ;
432:
433: : . ( n -- ) \ core dot
434: s>d d. ;
435: : u. ( u -- ) \ core u-dot
436: 0 ud. ;
1.1 anton 437:
438: \ catch throw 23feb93py
439: \ bounce 08jun93jaw
440:
441: \ !! allow the user to add rollback actions anton
442: \ !! use a separate exception stack? anton
443:
1.42 anton 444: : lp@ ( -- addr ) \ gforth l-p-fetch
1.5 anton 445: laddr# [ 0 , ] ;
446:
1.42 anton 447: : catch ( x1 .. xn xt -- y1 .. ym 0 / z1 .. zn error ) \ exception
1.5 anton 448: >r sp@ r> swap >r \ don't count xt! jaw
449: fp@ >r
450: lp@ >r
451: handler @ >r
452: rp@ handler !
453: execute
1.6 pazsan 454: r> handler ! rdrop rdrop rdrop 0 ;
455:
1.42 anton 456: : throw ( y1 .. ym error/0 -- y1 .. ym / z1 .. zn error ) \ exception
1.10 anton 457: ?DUP IF
1.54 anton 458: [ here 9 cells ! ]
1.10 anton 459: handler @ rp!
460: r> handler !
461: r> lp!
462: r> fp!
463: r> swap >r sp! r>
464: THEN ;
1.6 pazsan 465:
1.1 anton 466: \ Bouncing is very fine,
467: \ programming without wasting time... jaw
1.42 anton 468: : bounce ( y1 .. ym error/0 -- y1 .. ym error / y1 .. ym ) \ gforth
1.5 anton 469: \ a throw without data or fp stack restauration
470: ?DUP IF
471: handler @ rp!
472: r> handler !
473: r> lp!
474: rdrop
475: rdrop
476: THEN ;
1.1 anton 477:
478: \ ?stack 23feb93py
479:
1.42 anton 480: : ?stack ( ?? -- ?? ) \ gforth
1.40 pazsan 481: sp@ s0 @ > IF -4 throw THEN
482: fp@ f0 @ > IF -&45 throw THEN ;
1.1 anton 483: \ ?stack should be code -- it touches an empty stack!
484:
485: \ interpret 10mar92py
486:
487: Defer parser
1.42 anton 488: Defer name ( -- c-addr count ) \ gforth
489: \ get the next word from the input buffer
490: ' (name) IS name
1.59 ! anton 491: Defer compiler-notfound ( c-addr count -- )
! 492: Defer interpreter-notfound ( c-addr count -- )
1.1 anton 493:
1.42 anton 494: : no.extensions ( addr u -- )
495: 2drop -&13 bounce ;
1.59 ! anton 496: ' no.extensions IS compiler-notfound
! 497: ' no.extensions IS interpreter-notfound
1.1 anton 498:
1.56 anton 499: : compile-only ( ... -- )
500: -&14 throw ;
501: Defer interpret-special ( c-addr u xt -- ) \ !! use nfa instead of xt?
502: ' compile-only IS interpret-special
503:
1.42 anton 504: : interpret ( ?? -- ?? ) \ gforth
505: \ interpret/compile the (rest of the) input buffer
1.15 anton 506: BEGIN
1.20 pazsan 507: ?stack name dup
1.15 anton 508: WHILE
509: parser
510: REPEAT
511: 2drop ;
512:
1.20 pazsan 513: \ interpreter compiler 30apr92py
1.15 anton 514:
1.42 anton 515: : interpreter ( c-addr u -- ) \ gforth
1.15 anton 516: \ interpretation semantics for the name/number c-addr u
517: 2dup sfind dup
518: IF
519: 1 and
520: IF \ not restricted to compile state?
1.28 anton 521: nip nip execute EXIT
1.15 anton 522: THEN
1.56 anton 523: interpret-special exit
1.15 anton 524: THEN
525: drop
526: 2dup 2>r snumber?
527: IF
528: 2rdrop
529: ELSE
1.59 ! anton 530: 2r> interpreter-notfound
1.15 anton 531: THEN ;
1.1 anton 532:
1.20 pazsan 533: ' interpreter IS parser
1.1 anton 534:
1.42 anton 535: : compiler ( c-addr u -- ) \ gforth
1.15 anton 536: \ compilation semantics for the name/number c-addr u
537: 2dup sfind dup
538: IF
539: 0>
540: IF
541: nip nip execute EXIT
542: THEN
543: compile, 2drop EXIT
544: THEN
545: drop
546: 2dup snumber? dup
547: IF
548: 0>
549: IF
550: swap postpone Literal
551: THEN
552: postpone Literal
553: 2drop
554: ELSE
1.59 ! anton 555: drop compiler-notfound
1.15 anton 556: THEN ;
1.1 anton 557:
1.42 anton 558: : [ ( -- ) \ core left-bracket
559: ['] interpreter IS parser state off ; immediate
560: : ] ( -- ) \ core right-bracket
561: ['] compiler IS parser state on ;
1.1 anton 562:
1.8 anton 563: \ locals stuff needed for control structures
564:
1.42 anton 565: : compile-lp+! ( n -- ) \ gforth compile-l-p-plus-store
1.8 anton 566: dup negate locals-size +!
567: 0 over = if
1.20 pazsan 568: else -1 cells over = if postpone lp-
569: else 1 floats over = if postpone lp+
570: else 2 floats over = if postpone lp+2
1.8 anton 571: else postpone lp+!# dup ,
572: then then then then drop ;
573:
1.42 anton 574: : adjust-locals-size ( n -- ) \ gforth
1.8 anton 575: \ sets locals-size to n and generates an appropriate lp+!
576: locals-size @ swap - compile-lp+! ;
577:
578:
579: here 0 , \ just a dummy, the real value of locals-list is patched into it in glocals.fs
580: AConstant locals-list \ acts like a variable that contains
1.10 anton 581: \ a linear list of locals names
1.8 anton 582:
583:
584: variable dead-code \ true if normal code at "here" would be dead
1.22 anton 585: variable backedge-locals
586: \ contains the locals list that BEGIN will assume to be live on
587: \ the back edge if the BEGIN is unreachable from above. Set by
588: \ ASSUME-LIVE, reset by UNREACHABLE.
589:
1.42 anton 590: : UNREACHABLE ( -- ) \ gforth
1.22 anton 591: \ declares the current point of execution as unreachable
592: dead-code on
593: 0 backedge-locals ! ; immediate
594:
1.42 anton 595: : ASSUME-LIVE ( orig -- orig ) \ gforth
1.22 anton 596: \ used immediateliy before a BEGIN that is not reachable from
597: \ above. causes the BEGIN to assume that the same locals are live
598: \ as at the orig point
599: dup orig?
600: 2 pick backedge-locals ! ; immediate
601:
1.8 anton 602: \ locals list operations
603:
1.43 anton 604: : common-list ( list1 list2 -- list3 ) \ gforth-internal
1.8 anton 605: \ list1 and list2 are lists, where the heads are at higher addresses than
606: \ the tail. list3 is the largest sublist of both lists.
607: begin
608: 2dup u<>
609: while
610: 2dup u>
611: if
612: swap
613: then
614: @
615: repeat
616: drop ;
617:
1.43 anton 618: : sub-list? ( list1 list2 -- f ) \ gforth-internal
1.8 anton 619: \ true iff list1 is a sublist of list2
620: begin
621: 2dup u<
622: while
623: @
624: repeat
625: = ;
626:
1.43 anton 627: : list-size ( list -- u ) \ gforth-internal
1.8 anton 628: \ size of the locals frame represented by list
629: 0 ( list n )
630: begin
631: over 0<>
632: while
633: over
1.11 pazsan 634: name> >body @ max
1.8 anton 635: swap @ swap ( get next )
636: repeat
637: faligned nip ;
638:
639: : set-locals-size-list ( list -- )
640: dup locals-list !
641: list-size locals-size ! ;
642:
643: : check-begin ( list -- )
644: \ warn if list is not a sublist of locals-list
645: locals-list @ sub-list? 0= if
646: \ !! print current position
647: ." compiler was overly optimistic about locals at a BEGIN" cr
648: \ !! print assumption and reality
649: then ;
650:
651: \ Control Flow Stack
652: \ orig, etc. have the following structure:
653: \ type ( defstart, live-orig, dead-orig, dest, do-dest, scopestart) ( TOS )
654: \ address (of the branch or the instruction to be branched to) (second)
655: \ locals-list (valid at address) (third)
656:
657: \ types
658: 0 constant defstart
659: 1 constant live-orig
660: 2 constant dead-orig
661: 3 constant dest \ the loopback branch is always assumed live
662: 4 constant do-dest
663: 5 constant scopestart
664:
665: : def? ( n -- )
666: defstart <> abort" unstructured " ;
667:
668: : orig? ( n -- )
669: dup live-orig <> swap dead-orig <> and abort" expected orig " ;
670:
671: : dest? ( n -- )
672: dest <> abort" expected dest " ;
673:
674: : do-dest? ( n -- )
675: do-dest <> abort" expected do-dest " ;
676:
677: : scope? ( n -- )
678: scopestart <> abort" expected scope " ;
679:
680: : non-orig? ( n -- )
681: dest scopestart 1+ within 0= abort" expected dest, do-dest or scope" ;
682:
683: : cs-item? ( n -- )
684: live-orig scopestart 1+ within 0= abort" expected control flow stack item" ;
685:
686: 3 constant cs-item-size
687:
1.42 anton 688: : CS-PICK ( ... u -- ... destu ) \ tools-ext
1.8 anton 689: 1+ cs-item-size * 1- >r
690: r@ pick r@ pick r@ pick
691: rdrop
692: dup non-orig? ;
693:
1.42 anton 694: : CS-ROLL ( destu/origu .. dest0/orig0 u -- .. dest0/orig0 destu/origu ) \ tools-ext
1.8 anton 695: 1+ cs-item-size * 1- >r
696: r@ roll r@ roll r@ roll
697: rdrop
698: dup cs-item? ;
699:
700: : cs-push-part ( -- list addr )
701: locals-list @ here ;
702:
703: : cs-push-orig ( -- orig )
704: cs-push-part dead-code @
705: if
706: dead-orig
707: else
708: live-orig
709: then ;
710:
1.1 anton 711: \ Structural Conditionals 12dec92py
712:
713: : ?struc ( flag -- ) abort" unstructured " ;
714: : sys? ( sys -- ) dup 0= ?struc ;
1.8 anton 715: : >mark ( -- orig )
716: cs-push-orig 0 , ;
717: : >resolve ( addr -- ) here over - swap ! ;
718: : <resolve ( addr -- ) here - , ;
1.1 anton 719:
1.42 anton 720: : BUT
721: 1 cs-roll ; immediate restrict
722: : YET
723: 0 cs-pick ; immediate restrict
1.1 anton 724:
725: \ Structural Conditionals 12dec92py
726:
1.43 anton 727: : AHEAD ( compilation -- orig ; run-time -- ) \ tools-ext
1.42 anton 728: POSTPONE branch >mark POSTPONE unreachable ; immediate restrict
1.8 anton 729:
1.43 anton 730: : IF ( compilation -- orig ; run-time f -- ) \ core
1.8 anton 731: POSTPONE ?branch >mark ; immediate restrict
732:
1.43 anton 733: : ?DUP-IF ( compilation -- orig ; run-time n -- n| ) \ gforth question-dupe-if
1.1 anton 734: \ This is the preferred alternative to the idiom "?DUP IF", since it can be
1.52 anton 735: \ better handled by tools like stack checkers. Besides, it's faster.
736: POSTPONE ?dup-?branch >mark ; immediate restrict
737:
1.43 anton 738: : ?DUP-0=-IF ( compilation -- orig ; run-time n -- n| ) \ gforth question-dupe-zero-equals-if
1.52 anton 739: POSTPONE ?dup-0=-?branch >mark ; immediate restrict
1.8 anton 740:
1.43 anton 741: : THEN ( compilation orig -- ; run-time -- ) \ core
1.8 anton 742: dup orig?
1.20 pazsan 743: dead-orig =
1.8 anton 744: if
1.20 pazsan 745: >resolve drop
746: else
747: dead-code @
748: if
1.8 anton 749: >resolve set-locals-size-list dead-code off
750: else \ both live
751: over list-size adjust-locals-size
752: >resolve
753: locals-list @ common-list dup list-size adjust-locals-size
754: locals-list !
755: then
756: then ; immediate restrict
757:
1.43 anton 758: ' THEN alias ENDIF ( compilation orig -- ; run-time -- ) \ gforth
1.42 anton 759: immediate restrict
1.1 anton 760: \ Same as "THEN". This is what you use if your program will be seen by
761: \ people who have not been brought up with Forth (or who have been
762: \ brought up with fig-Forth).
763:
1.43 anton 764: : ELSE ( compilation orig1 -- orig2 ; run-time f -- ) \ core
1.8 anton 765: POSTPONE ahead
766: 1 cs-roll
767: POSTPONE then ; immediate restrict
768:
769:
1.43 anton 770: : BEGIN ( compilation -- dest ; run-time -- ) \ core
1.8 anton 771: dead-code @ if
1.22 anton 772: \ set up an assumption of the locals visible here. if the
773: \ users want something to be visible, they have to declare
774: \ that using ASSUME-LIVE
775: backedge-locals @ set-locals-size-list
1.8 anton 776: then
777: cs-push-part dest
778: dead-code off ; immediate restrict
779:
780: \ AGAIN (the current control flow joins another, earlier one):
781: \ If the dest-locals-list is not a subset of the current locals-list,
782: \ issue a warning (see below). The following code is generated:
783: \ lp+!# (current-local-size - dest-locals-size)
784: \ branch <begin>
1.43 anton 785: : AGAIN ( compilation dest -- ; run-time -- ) \ core-ext
1.8 anton 786: dest?
787: over list-size adjust-locals-size
788: POSTPONE branch
789: <resolve
790: check-begin
1.22 anton 791: POSTPONE unreachable ; immediate restrict
1.8 anton 792:
793: \ UNTIL (the current control flow may join an earlier one or continue):
794: \ Similar to AGAIN. The new locals-list and locals-size are the current
795: \ ones. The following code is generated:
796: \ ?branch-lp+!# <begin> (current-local-size - dest-locals-size)
797: : until-like ( list addr xt1 xt2 -- )
798: \ list and addr are a fragment of a cs-item
799: \ xt1 is the conditional branch without lp adjustment, xt2 is with
800: >r >r
801: locals-size @ 2 pick list-size - dup if ( list dest-addr adjustment )
802: r> drop r> compile,
803: swap <resolve ( list adjustment ) ,
804: else ( list dest-addr adjustment )
805: drop
806: r> compile, <resolve
807: r> drop
808: then ( list )
809: check-begin ;
810:
1.43 anton 811: : UNTIL ( compilation dest -- ; run-time f -- ) \ core
1.8 anton 812: dest? ['] ?branch ['] ?branch-lp+!# until-like ; immediate restrict
813:
1.43 anton 814: : WHILE ( compilation dest -- orig dest ; run-time f -- ) \ core
1.8 anton 815: POSTPONE if
816: 1 cs-roll ; immediate restrict
817:
1.43 anton 818: : REPEAT ( compilation orig dest -- ; run-time -- ) \ core
1.8 anton 819: POSTPONE again
820: POSTPONE then ; immediate restrict
821:
822:
823: \ counted loops
824:
825: \ leave poses a little problem here
826: \ we have to store more than just the address of the branch, so the
827: \ traditional linked list approach is no longer viable.
828: \ This is solved by storing the information about the leavings in a
1.9 pazsan 829: \ special stack.
1.8 anton 830:
831: \ !! remove the fixed size limit. 'Tis not hard.
832: 20 constant leave-stack-size
1.9 pazsan 833: create leave-stack 60 cells allot
834: Avariable leave-sp leave-stack 3 cells + leave-sp !
1.8 anton 835:
836: : clear-leave-stack ( -- )
837: leave-stack leave-sp ! ;
838:
839: \ : leave-empty? ( -- f )
840: \ leave-sp @ leave-stack = ;
841:
842: : >leave ( orig -- )
843: \ push on leave-stack
844: leave-sp @
845: dup [ leave-stack 60 cells + ] Aliteral
846: >= abort" leave-stack full"
847: tuck ! cell+
848: tuck ! cell+
849: tuck ! cell+
850: leave-sp ! ;
851:
852: : leave> ( -- orig )
853: \ pop from leave-stack
854: leave-sp @
1.9 pazsan 855: dup leave-stack <= IF
856: drop 0 0 0 EXIT THEN
1.8 anton 857: cell - dup @ swap
858: cell - dup @ swap
859: cell - dup @ swap
860: leave-sp ! ;
861:
1.43 anton 862: : DONE ( compilation orig -- ; run-time -- ) \ gforth
1.8 anton 863: \ !! the original done had ( addr -- )
1.29 anton 864: drop >r drop
1.8 anton 865: begin
866: leave>
1.9 pazsan 867: over r@ u>=
1.8 anton 868: while
869: POSTPONE then
870: repeat
1.9 pazsan 871: >leave rdrop ; immediate restrict
1.8 anton 872:
1.43 anton 873: : LEAVE ( compilation -- ; run-time loop-sys -- ) \ core
1.8 anton 874: POSTPONE ahead
1.9 pazsan 875: >leave ; immediate restrict
1.8 anton 876:
1.43 anton 877: : ?LEAVE ( compilation -- ; run-time f | f loop-sys -- ) \ gforth question-leave
1.8 anton 878: POSTPONE 0= POSTPONE if
1.9 pazsan 879: >leave ; immediate restrict
1.8 anton 880:
1.43 anton 881: : DO ( compilation -- do-sys ; run-time w1 w2 -- loop-sys ) \ core
1.8 anton 882: POSTPONE (do)
883: POSTPONE begin drop do-dest
1.9 pazsan 884: ( 0 0 0 >leave ) ; immediate restrict
1.8 anton 885:
1.41 anton 886: : ?do-like ( -- do-sys )
1.9 pazsan 887: ( 0 0 0 >leave )
1.8 anton 888: >mark >leave
1.41 anton 889: POSTPONE begin drop do-dest ;
890:
1.43 anton 891: : ?DO ( compilation -- do-sys ; run-time w1 w2 -- | loop-sys ) \ core-ext question-do
1.41 anton 892: POSTPONE (?do) ?do-like ; immediate restrict
893:
1.51 anton 894: : +DO ( compilation -- do-sys ; run-time n1 n2 -- | loop-sys ) \ gforth plus-do
1.41 anton 895: POSTPONE (+do) ?do-like ; immediate restrict
896:
1.51 anton 897: : U+DO ( compilation -- do-sys ; run-time u1 u2 -- | loop-sys ) \ gforth u-plus-do
1.41 anton 898: POSTPONE (u+do) ?do-like ; immediate restrict
899:
1.51 anton 900: : -DO ( compilation -- do-sys ; run-time n1 n2 -- | loop-sys ) \ gforth minus-do
1.41 anton 901: POSTPONE (-do) ?do-like ; immediate restrict
902:
1.51 anton 903: : U-DO ( compilation -- do-sys ; run-time u1 u2 -- | loop-sys ) \ gforth u-minus-do
1.41 anton 904: POSTPONE (u-do) ?do-like ; immediate restrict
1.8 anton 905:
1.51 anton 906: : FOR ( compilation -- do-sys ; run-time u -- loop-sys ) \ gforth
1.8 anton 907: POSTPONE (for)
908: POSTPONE begin drop do-dest
1.9 pazsan 909: ( 0 0 0 >leave ) ; immediate restrict
1.8 anton 910:
911: \ LOOP etc. are just like UNTIL
912:
913: : loop-like ( do-sys xt1 xt2 -- )
1.9 pazsan 914: >r >r 0 cs-pick swap cell - swap 1 cs-roll r> r> rot do-dest?
1.8 anton 915: until-like POSTPONE done POSTPONE unloop ;
916:
1.43 anton 917: : LOOP ( compilation do-sys -- ; run-time loop-sys1 -- | loop-sys2 ) \ core
1.9 pazsan 918: ['] (loop) ['] (loop)-lp+!# loop-like ; immediate restrict
1.8 anton 919:
1.43 anton 920: : +LOOP ( compilation do-sys -- ; run-time loop-sys1 n -- | loop-sys2 ) \ core plus-loop
1.9 pazsan 921: ['] (+loop) ['] (+loop)-lp+!# loop-like ; immediate restrict
1.8 anton 922:
1.41 anton 923: \ !! should the compiler warn about +DO..-LOOP?
1.43 anton 924: : -LOOP ( compilation do-sys -- ; run-time loop-sys1 u -- | loop-sys2 ) \ gforth minus-loop
1.41 anton 925: ['] (-loop) ['] (-loop)-lp+!# loop-like ; immediate restrict
926:
1.8 anton 927: \ A symmetric version of "+LOOP". I.e., "-high -low ?DO -inc S+LOOP"
928: \ will iterate as often as "high low ?DO inc S+LOOP". For positive
929: \ increments it behaves like "+LOOP". Use S+LOOP instead of +LOOP for
930: \ negative increments.
1.43 anton 931: : S+LOOP ( compilation do-sys -- ; run-time loop-sys1 n -- | loop-sys2 ) \ gforth s-plus-loop
1.9 pazsan 932: ['] (s+loop) ['] (s+loop)-lp+!# loop-like ; immediate restrict
1.5 anton 933:
1.43 anton 934: : NEXT ( compilation do-sys -- ; run-time loop-sys1 -- | loop-sys2 ) \ gforth
1.9 pazsan 935: ['] (next) ['] (next)-lp+!# loop-like ; immediate restrict
1.1 anton 936:
937: \ Structural Conditionals 12dec92py
938:
1.43 anton 939: : EXIT ( compilation -- ; run-time nest-sys -- ) \ core
1.8 anton 940: 0 adjust-locals-size
941: POSTPONE ;s
1.22 anton 942: POSTPONE unreachable ; immediate restrict
1.1 anton 943:
1.43 anton 944: : ?EXIT ( -- ) ( compilation -- ; run-time nest-sys f -- | nest-sys ) \ gforth
1.8 anton 945: POSTPONE if POSTPONE exit POSTPONE then ; immediate restrict
1.1 anton 946:
947: \ Strings 22feb93py
948:
949: : ," ( "string"<"> -- ) [char] " parse
950: here over char+ allot place align ;
951: : "lit ( -- addr )
952: r> r> dup count + aligned >r swap >r ; restrict
953: : (.") "lit count type ; restrict
954: : (S") "lit count ; restrict
1.43 anton 955: : SLiteral ( Compilation c-addr1 u ; run-time -- c-addr2 u ) \ string
1.42 anton 956: postpone (S") here over char+ allot place align ;
1.1 anton 957: immediate restrict
1.35 anton 958: create s"-buffer /line chars allot
1.43 anton 959: : S" ( compilation 'ccc"' -- ; run-time -- c-addr u ) \ core,file s-quote
1.58 anton 960: [char] " parse postpone SLiteral ; immediate restrict
1.42 anton 961:
1.43 anton 962: : ." ( compilation 'ccc"' -- ; run-time -- ) \ core dot-quote
1.58 anton 963: postpone (.") ," align ; immediate restrict
1.43 anton 964: : ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ core,file paren
1.53 pazsan 965: BEGIN
966: >in @ [char] ) parse nip >in @ rot - =
967: WHILE
968: loadfile @ IF
969: refill 0= abort" missing ')' in paren comment"
970: THEN
971: REPEAT ; immediate
1.32 anton 972: : \ ( -- ) \ core-ext backslash
973: blk @
974: IF
975: >in @ c/l / 1+ c/l * >in !
976: EXIT
977: THEN
978: source >in ! drop ; immediate
979:
1.42 anton 980: : \G ( -- ) \ gforth backslash
1.32 anton 981: POSTPONE \ ; immediate
1.1 anton 982:
983: \ error handling 22feb93py
984: \ 'abort thrown out! 11may93jaw
985:
1.42 anton 986: : (abort")
987: "lit >r
988: IF
989: r> "error ! -2 throw
990: THEN
991: rdrop ;
1.43 anton 992: : abort" ( compilation 'ccc"' -- ; run-time f -- ) \ core,exception-ext abort-quote
1.42 anton 993: postpone (abort") ," ; immediate restrict
1.1 anton 994:
995: \ Header states 23feb93py
996:
1.58 anton 997: : cset ( bmask c-addr -- )
998: tuck c@ or swap c! ;
999: : creset ( bmask c-addr -- )
1000: tuck c@ swap invert and swap c! ;
1001: : ctoggle ( bmask c-addr -- )
1002: tuck c@ xor swap c! ;
1003:
1004: : lastflags ( -- c-addr )
1005: \ the address of the flags byte in the last header
1006: \ aborts if the last defined word was headerless
1007: last @ dup 0= abort" last word was headerless" cell+ ;
1008:
1.59 ! anton 1009: : immediate immediate-mask lastflags cset ;
! 1010: : restrict restrict-mask lastflags cset ;
1.1 anton 1011:
1012: \ Header 23feb93py
1013:
1014: \ input-stream, nextname and noname are quite ugly (passing
1015: \ information through global variables), but they are useful for dealing
1016: \ with existing/independent defining words
1017:
1.20 pazsan 1018: defer (header)
1.42 anton 1019: defer header ( -- ) \ gforth
1020: ' (header) IS header
1.1 anton 1021:
1.42 anton 1022: : string, ( c-addr u -- ) \ gforth
1.28 anton 1023: \ puts down string as cstring
1024: dup c, here swap chars dup allot move ;
1025:
1.59 ! anton 1026: : header, ( c-addr u -- ) \ gforth
! 1027: name-too-long?
! 1028: align here last !
! 1029: current @ 1 or A, \ link field; before revealing, it contains the
! 1030: \ tagged reveal-into wordlist
! 1031: string, cfalign
! 1032: alias-mask lastflags cset ;
! 1033:
1.1 anton 1034: : input-stream-header ( "name" -- )
1.59 ! anton 1035: name name-too-short? header, ;
1.1 anton 1036: : input-stream ( -- ) \ general
1037: \ switches back to getting the name from the input stream ;
1.20 pazsan 1038: ['] input-stream-header IS (header) ;
1.1 anton 1039:
1.20 pazsan 1040: ' input-stream-header IS (header)
1.1 anton 1041:
1042: \ !! make that a 2variable
1.5 anton 1043: create nextname-buffer 32 chars allot
1.1 anton 1044:
1045: : nextname-header ( -- )
1.59 ! anton 1046: nextname-buffer count header,
1.1 anton 1047: input-stream ;
1048:
1049: \ the next name is given in the string
1.42 anton 1050: : nextname ( c-addr u -- ) \ gforth
1.35 anton 1051: name-too-long?
1.5 anton 1052: nextname-buffer c! ( c-addr )
1053: nextname-buffer count move
1.20 pazsan 1054: ['] nextname-header IS (header) ;
1.1 anton 1055:
1056: : noname-header ( -- )
1.28 anton 1057: 0 last ! cfalign
1.1 anton 1058: input-stream ;
1059:
1.42 anton 1060: : noname ( -- ) \ gforth
1.1 anton 1061: \ the next defined word remains anonymous. The xt of that word is given by lastxt
1.20 pazsan 1062: ['] noname-header IS (header) ;
1.1 anton 1063:
1.42 anton 1064: : lastxt ( -- xt ) \ gforth
1.1 anton 1065: \ xt is the execution token of the last word defined. The main purpose of this word is to get the xt of words defined using noname
1066: lastcfa @ ;
1067:
1.42 anton 1068: : Alias ( cfa "name" -- ) \ gforth
1.58 anton 1069: Header reveal
1.59 ! anton 1070: alias-mask lastflags creset
1.58 anton 1071: dup A, lastcfa ! ;
1.1 anton 1072:
1.42 anton 1073: : name>string ( nfa -- addr count ) \ gforth name-to-string
1.1 anton 1074: cell+ count $1F and ;
1075:
1.9 pazsan 1076: Create ??? 0 , 3 c, char ? c, char ? c, char ? c,
1.42 anton 1077: : >name ( cfa -- nfa ) \ gforth to-name
1.1 anton 1078: $21 cell do
1.59 ! anton 1079: dup i - count $9F and + cfaligned over alias-mask + = if
1.1 anton 1080: i - cell - unloop exit
1081: then
1082: cell +loop
1083: drop ??? ( wouldn't 0 be better? ) ;
1084:
1.41 anton 1085: \ threading 17mar93py
1.1 anton 1086:
1.42 anton 1087: : cfa, ( code-address -- ) \ gforth cfa-comma
1.41 anton 1088: here
1089: dup lastcfa !
1090: 0 A, 0 , code-address! ;
1.42 anton 1091: : compile, ( xt -- ) \ core-ext compile-comma
1.41 anton 1092: A, ;
1.42 anton 1093: : !does ( addr -- ) \ gforth store-does
1094: lastxt does-code! ;
1095: : (does>) ( R: addr -- )
1096: r> /does-handler + !does ;
1.1 anton 1097: : dodoes, ( -- )
1098: here /does-handler allot does-handler! ;
1099:
1.42 anton 1100: : Create ( -- ) \ core
1101: Header reveal dovar: cfa, ;
1.1 anton 1102:
1103: \ DOES> 17mar93py
1104:
1.43 anton 1105: : DOES> ( compilation colon-sys1 -- colon-sys2 ; run-time nest-sys -- ) \ core does
1.58 anton 1106: ;-hook postpone (does>) ?struc dodoes,
1107: defstart :-hook ; immediate restrict
1.1 anton 1108:
1109: \ Create Variable User Constant 17mar93py
1110:
1.42 anton 1111: : Variable ( -- ) \ core
1112: Create 0 , ;
1113: : AVariable ( -- ) \ gforth
1114: Create 0 A, ;
1.1 anton 1115: : 2VARIABLE ( "name" -- ) \ double
1116: create 0 , 0 , ;
1117:
1.42 anton 1118: : User
1119: Variable ;
1120: : AUser
1121: AVariable ;
1.1 anton 1122:
1.41 anton 1123: : (Constant) Header reveal docon: cfa, ;
1.42 anton 1124: : Constant ( w -- ) \ core
1125: (Constant) , ;
1126: : AConstant ( addr -- ) \ gforth
1127: (Constant) A, ;
1.5 anton 1128:
1.42 anton 1129: : 2Constant ( d -- ) \ double
1.31 pazsan 1130: Create ( w1 w2 "name" -- )
1.5 anton 1131: 2,
1.31 pazsan 1132: DOES> ( -- w1 w2 )
1.5 anton 1133: 2@ ;
1.1 anton 1134:
1135: \ IS Defer What's Defers TO 24feb93py
1136:
1.42 anton 1137: : Defer ( -- ) \ gforth
1.15 anton 1138: \ !! shouldn't it be initialized with abort or something similar?
1.41 anton 1139: Header Reveal dodefer: cfa,
1.15 anton 1140: ['] noop A, ;
1141: \ Create ( -- )
1142: \ ['] noop A,
1143: \ DOES> ( ??? )
1.55 anton 1144: \ perform ;
1.1 anton 1145:
1.42 anton 1146: : IS ( addr "name" -- ) \ gforth
1.58 anton 1147: ' >body postpone ALiteral postpone ! ; immediate restrict
1.42 anton 1148: ' IS Alias TO ( addr "name" -- ) \ core-ext
1.58 anton 1149: immediate restrict
1.1 anton 1150:
1.42 anton 1151: : What's ( "name" -- addr ) \ gforth
1.58 anton 1152: ' >body postpone ALiteral postpone @ ; immediate restrict
1153:
1.42 anton 1154: : Defers ( "name" -- ) \ gforth
1155: ' >body @ compile, ; immediate
1.1 anton 1156:
1157: \ : ; 24feb93py
1158:
1.5 anton 1159: defer :-hook ( sys1 -- sys2 )
1160: defer ;-hook ( sys2 -- sys1 )
1161:
1.42 anton 1162: : : ( -- colon-sys ) \ core colon
1163: Header docol: cfa, defstart ] :-hook ;
1.43 anton 1164: : ; ( compilation colon-sys -- ; run-time nest-sys ) \ core semicolon
1.42 anton 1165: ;-hook ?struc postpone exit reveal postpone [ ; immediate restrict
1.5 anton 1166:
1.42 anton 1167: : :noname ( -- xt colon-sys ) \ core-ext colon-no-name
1.10 anton 1168: 0 last !
1.41 anton 1169: here docol: cfa, 0 ] :-hook ;
1.1 anton 1170:
1171: \ Search list handling 23feb93py
1172:
1.42 anton 1173: AVariable current ( -- addr ) \ gforth
1.1 anton 1174:
1.42 anton 1175: : last? ( -- false / nfa nfa )
1176: last @ ?dup ;
1.59 ! anton 1177: : (reveal) ( nfa wid -- )
! 1178: ( wid>wordlist-id ) dup >r
! 1179: @ over ( name>link ) !
! 1180: r> ! ;
1.1 anton 1181:
1182: \ object oriented search list 17mar93py
1183:
1.5 anton 1184: \ word list structure:
1.31 pazsan 1185:
1186: struct
1187: 1 cells: field find-method \ xt: ( c_addr u wid -- name-id )
1.59 ! anton 1188: 1 cells: field reveal-method \ xt: ( nfa wid -- ) \ used by dofield:, must be field
1.31 pazsan 1189: 1 cells: field rehash-method \ xt: ( wid -- )
1.5 anton 1190: \ \ !! what else
1.31 pazsan 1191: end-struct wordlist-map-struct
1.5 anton 1192:
1.31 pazsan 1193: struct
1194: 1 cells: field wordlist-id \ not the same as wid; representation depends on implementation
1195: 1 cells: field wordlist-map \ pointer to a wordlist-map-struct
1196: 1 cells: field wordlist-link \ link field to other wordlists
1197: 1 cells: field wordlist-extend \ points to wordlist extensions (eg hash)
1198: end-struct wordlist-struct
1.5 anton 1199:
1.59 ! anton 1200: : f83find ( addr len wordlist -- nfa / false )
! 1201: ( wid>wordlist-id ) @ (f83find) ;
1.5 anton 1202:
1.1 anton 1203: \ Search list table: find reveal
1.59 ! anton 1204: Create f83search ( -- wordlist-map )
! 1205: ' f83find A, ' (reveal) A, ' drop A,
1.7 pazsan 1206:
1.1 anton 1207: Create forth-wordlist NIL A, G f83search T A, NIL A, NIL A,
1.18 pazsan 1208: AVariable lookup G forth-wordlist lookup T !
1.1 anton 1209: G forth-wordlist current T !
1210:
1211: : (search-wordlist) ( addr count wid -- nfa / false )
1.55 anton 1212: dup wordlist-map @ find-method perform ;
1.1 anton 1213:
1.42 anton 1214: : search-wordlist ( addr count wid -- 0 / xt +-1 ) \ search
1.28 anton 1215: (search-wordlist) dup IF found THEN ;
1.1 anton 1216:
1.42 anton 1217: Variable warnings ( -- addr ) \ gforth
1218: G -1 warnings T !
1.1 anton 1219:
1220: : check-shadow ( addr count wid -- )
1221: \ prints a warning if the string is already present in the wordlist
1222: \ !! should be refined so the user can suppress the warnings
1223: >r 2dup 2dup r> (search-wordlist) warnings @ and ?dup if
1224: ." redefined " name>string 2dup type
1225: compare 0<> if
1226: ." with " type
1227: else
1228: 2drop
1229: then
1230: space space EXIT
1231: then
1232: 2drop 2drop ;
1233:
1.58 anton 1234: : (sfind) ( c-addr u -- nfa | 0 )
1235: lookup @ (search-wordlist) ;
1236:
1.42 anton 1237: : sfind ( c-addr u -- xt n / 0 ) \ gforth
1.18 pazsan 1238: lookup @ search-wordlist ;
1.15 anton 1239:
1.42 anton 1240: : find ( addr -- cfa +-1 / string false ) \ core,search
1.15 anton 1241: \ !! not ANS conformant: returns +-2 for restricted words
1242: dup count sfind dup if
1243: rot drop
1244: then ;
1.1 anton 1245:
1.42 anton 1246: : reveal ( -- ) \ gforth
1.59 ! anton 1247: last?
! 1248: if \ the last word has a header
! 1249: dup ( name>link ) @ 1 and
! 1250: if \ it is still hidden
! 1251: dup ( name>link ) @ 1 xor ( nfa wid )
! 1252: 2dup >r name>string r> check-shadow ( nfa wid )
! 1253: dup wordlist-map @ reveal-method perform
! 1254: then
! 1255: then ;
1.7 pazsan 1256:
1.42 anton 1257: : rehash ( wid -- )
1.55 anton 1258: dup wordlist-map @ rehash-method perform ;
1.1 anton 1259:
1.42 anton 1260: : ' ( "name" -- addr ) \ core tick
1261: name sfind 0= if -&13 bounce then ;
1.43 anton 1262: : ['] ( compilation "name" -- ; run-time --addr ) \ core bracket-tick
1.58 anton 1263: ' postpone ALiteral ; immediate restrict
1.1 anton 1264: \ Input 13feb93py
1265:
1.42 anton 1266: 07 constant #bell ( -- c ) \ gforth
1267: 08 constant #bs ( -- c ) \ gforth
1268: 09 constant #tab ( -- c ) \ gforth
1269: 7F constant #del ( -- c ) \ gforth
1270: 0D constant #cr ( -- c ) \ gforth
1271: \ the newline key code
1272: 0C constant #ff ( -- c ) \ gforth
1273: 0A constant #lf ( -- c ) \ gforth
1.1 anton 1274:
1275: : bell #bell emit ;
1.50 anton 1276: : cr ( -- ) \ core
1277: \ emit a newline
1278: #lf ( sic! ) emit ;
1.1 anton 1279:
1.23 pazsan 1280: \ : backspaces 0 ?DO #bs emit LOOP ;
1.57 pazsan 1281:
1282: Variable ^d-mode -1 ^d-mode ! \ ^d is "EOF" if at beginning of the line
1283:
1.1 anton 1284: : >string ( span addr pos1 -- span addr pos1 addr2 len )
1285: over 3 pick 2 pick chars /string ;
1286: : type-rest ( span addr pos1 -- span addr pos1 back )
1287: >string tuck type ;
1288: : (del) ( max span addr pos1 -- max span addr pos2 )
1289: 1- >string over 1+ -rot move
1290: rot 1- -rot #bs emit type-rest bl emit 1+ backspaces ;
1291: : (ins) ( max span addr pos1 char -- max span addr pos2 )
1292: >r >string over 1+ swap move 2dup chars + r> swap c!
1293: rot 1+ -rot type-rest 1- backspaces 1+ ;
1294: : ?del ( max span addr pos1 -- max span addr pos2 0 )
1295: dup IF (del) THEN 0 ;
1296: : (ret) type-rest drop true space ;
1297: : back dup IF 1- #bs emit ELSE #bell emit THEN 0 ;
1298: : forw 2 pick over <> IF 2dup + c@ emit 1+ ELSE #bell emit THEN 0 ;
1.57 pazsan 1299: : eof ^d-mode @ IF
1300: bye
1301: ELSE 2 pick over <>
1302: IF forw drop (del) ELSE #bell emit THEN 0
1303: THEN ;
1.1 anton 1304:
1.21 pazsan 1305: Create ctrlkeys
1.40 pazsan 1306: ] false false back false eof false forw false
1.1 anton 1307: ?del false (ret) false false (ret) false false
1308: false false false false false false false false
1309: false false false false false false false false [
1310:
1.21 pazsan 1311: defer everychar
1312: ' noop IS everychar
1313:
1.1 anton 1314: : decode ( max span addr pos1 key -- max span addr pos2 flag )
1.21 pazsan 1315: everychar
1.1 anton 1316: dup #del = IF drop #bs THEN \ del is rubout
1.55 anton 1317: dup bl < IF cells ctrlkeys + perform EXIT THEN
1.1 anton 1318: >r 2over = IF rdrop bell 0 EXIT THEN
1319: r> (ins) 0 ;
1320:
1.42 anton 1321: : accept ( addr len -- len ) \ core
1.1 anton 1322: dup 0< IF abs over dup 1 chars - c@ tuck type
1323: \ this allows to edit given strings
1324: ELSE 0 THEN rot over
1.57 pazsan 1325: BEGIN key decode dup ^d-mode ! UNTIL
1.1 anton 1326: 2drop nip ;
1327:
1328: \ Output 13feb93py
1329:
1.52 anton 1330: : (type) ( c-addr u -- ) \ gforth
1331: outfile-id write-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ?
1332: ;
1333:
1.42 anton 1334: Defer type ( c-addr u -- ) \ core
1335: \ defer type for a output buffer or fast
1336: \ screen write
1.1 anton 1337:
1.52 anton 1338: ' (type) IS Type
1.1 anton 1339:
1.52 anton 1340: : (emit) ( c -- ) \ gforth
1341: outfile-id emit-file drop \ !! use ?DUP-IF THROW ENDIF instead of DROP ?
1342: ;
1.1 anton 1343:
1.42 anton 1344: Defer emit ( c -- ) \ core
1.9 pazsan 1345: ' (Emit) IS Emit
1.1 anton 1346:
1.42 anton 1347: Defer key ( -- c ) \ core
1.17 pazsan 1348: ' (key) IS key
1349:
1.1 anton 1350: \ Query 07apr93py
1351:
1.42 anton 1352: : refill ( -- flag ) \ core-ext,block-ext,file-ext
1.39 pazsan 1353: blk @ IF 1 blk +! true 0 >in ! EXIT THEN
1.1 anton 1354: tib /line
1355: loadfile @ ?dup
1.17 pazsan 1356: IF read-line throw
1.48 anton 1357: ELSE sourceline# 0< IF 2drop false EXIT THEN
1.1 anton 1358: accept true
1359: THEN
1360: 1 loadline +!
1.10 anton 1361: swap #tib ! 0 >in ! ;
1.1 anton 1362:
1.42 anton 1363: : Query ( -- ) \ core-ext
1364: \ obsolescent
1365: loadfile off blk off refill drop ;
1.1 anton 1366:
1367: \ File specifiers 11jun93jaw
1368:
1369:
1370: \ 1 c, here char r c, 0 c, 0 c, 0 c, char b c, 0 c,
1371: \ 2 c, here char r c, char + c, 0 c,
1372: \ 2 c, here char w c, char + c, 0 c, align
1.42 anton 1373: 4 Constant w/o ( -- fam ) \ file w-o
1.51 anton 1374: 2 Constant r/w ( -- fam ) \ file r-w
1375: 0 Constant r/o ( -- fam ) \ file r-o
1.1 anton 1376:
1377: \ BIN WRITE-LINE 11jun93jaw
1378:
1379: \ : bin dup 1 chars - c@
1380: \ r/o 4 chars + over - dup >r swap move r> ;
1381:
1.42 anton 1382: : bin ( fam1 -- fam2 ) \ file
1383: 1 or ;
1.1 anton 1384:
1385: create nl$ 1 c, A c, 0 c, \ gnu includes usually a cr in dos
1386: \ or not unix environments if
1387: \ bin is not selected
1388:
1.42 anton 1389: : write-line ( c-addr u fileid -- ior ) \ file
1390: dup >r write-file
1391: ?dup IF
1392: r> drop EXIT
1393: THEN
1394: nl$ count r> write-file ;
1.1 anton 1395:
1396: \ include-file 07apr93py
1397:
1.12 pazsan 1398: : push-file ( -- ) r>
1.48 anton 1399: sourceline# >r loadfile @ >r
1.47 pazsan 1400: blk @ >r tibstack @ >r >tib @ >r #tib @ >r
1401: >tib @ tibstack @ = IF r@ tibstack +! THEN
1402: tibstack @ >tib ! >in @ >r >r ;
1.12 pazsan 1403:
1.18 pazsan 1404: : pop-file ( throw-code -- throw-code )
1405: dup IF
1.48 anton 1406: source >in @ sourceline# sourcefilename
1.18 pazsan 1407: error-stack dup @ dup 1+
1408: max-errors 1- min error-stack !
1409: 6 * cells + cell+
1410: 5 cells bounds swap DO
1411: I !
1412: -1 cells +LOOP
1413: THEN
1414: r>
1.47 pazsan 1415: r> >in ! r> #tib ! r> >tib ! r> tibstack ! r> blk !
1.17 pazsan 1416: r> loadfile ! r> loadline ! >r ;
1417:
1418: : read-loop ( i*x -- j*x )
1419: BEGIN refill WHILE interpret REPEAT ;
1.12 pazsan 1420:
1.42 anton 1421: : include-file ( i*x fid -- j*x ) \ file
1.12 pazsan 1422: push-file loadfile !
1.17 pazsan 1423: 0 loadline ! blk off ['] read-loop catch
1.20 pazsan 1424: loadfile @ close-file swap 2dup or
1425: pop-file drop throw throw ;
1.1 anton 1426:
1.19 anton 1427: create pathfilenamebuf 256 chars allot \ !! make this grow on demand
1428:
1.37 anton 1429: \ : check-file-prefix ( addr len -- addr' len' flag )
1430: \ dup 0= IF true EXIT THEN
1431: \ over c@ '/ = IF true EXIT THEN
1432: \ over 2 S" ./" compare 0= IF true EXIT THEN
1433: \ over 3 S" ../" compare 0= IF true EXIT THEN
1434: \ over 2 S" ~/" compare 0=
1435: \ IF 1 /string
1436: \ S" HOME" getenv tuck pathfilenamebuf swap move
1437: \ 2dup + >r pathfilenamebuf + swap move
1438: \ pathfilenamebuf r> true
1439: \ ELSE false
1440: \ THEN ;
1.36 pazsan 1441:
1.42 anton 1442: : open-path-file ( c-addr1 u1 -- file-id c-addr2 u2 ) \ gforth
1.37 anton 1443: \ opens a file for reading, searching in the path for it (unless
1444: \ the filename contains a slash); c-addr2 u2 is the full filename
1445: \ (valid until the next call); if the file is not found (or in
1446: \ case of other errors for each try), -38 (non-existant file) is
1447: \ thrown. Opening for other access modes makes little sense, as
1448: \ the path will usually contain dirs that are only readable for
1449: \ the user
1450: \ !! use file-status to determine access mode?
1451: 2dup [char] / scan nip ( 0<> )
1452: if \ the filename contains a slash
1453: 2dup r/o open-file throw ( c-addr1 u1 file-id )
1454: -rot >r pathfilenamebuf r@ cmove ( file-id R: u1 )
1455: pathfilenamebuf r> EXIT
1456: then
1457: pathdirs 2@ 0
1458: \ check-file-prefix 0=
1459: \ IF pathdirs 2@ 0
1.19 anton 1460: ?DO ( c-addr1 u1 dirnamep )
1461: dup >r 2@ dup >r pathfilenamebuf swap cmove ( addr u )
1462: 2dup pathfilenamebuf r@ chars + swap cmove ( addr u )
1463: pathfilenamebuf over r> + dup >r r/o open-file 0=
1.36 pazsan 1464: IF ( addr u file-id )
1.37 anton 1465: nip nip r> rdrop 0 LEAVE
1.36 pazsan 1466: THEN
1.19 anton 1467: rdrop drop r> cell+ cell+
1468: LOOP
1.37 anton 1469: \ ELSE 2dup open-file throw -rot THEN
1.19 anton 1470: 0<> -&38 and throw ( file-id u2 )
1471: pathfilenamebuf swap ;
1472:
1.27 anton 1473: create included-files 0 , 0 , ( pointer to and count of included files )
1.49 pazsan 1474: here ," the terminal" dup c@ swap 1 + swap , A, here 2 cells -
1475: create image-included-files 1 , A, ( pointer to and count of included files )
1.42 anton 1476: \ included-files points to ALLOCATEd space, while image-included-files
1477: \ points to ALLOTed objects, so it survives a save-system
1478:
1.46 anton 1479: : loadfilename ( -- a-addr )
1480: \ a-addr 2@ produces the current file name ( c-addr u )
1481: included-files 2@ drop loadfilename# @ 2* cells + ;
1482:
1.48 anton 1483: : sourcefilename ( -- c-addr u ) \ gforth
1484: \ the name of the source file which is currently the input
1485: \ source. The result is valid only while the file is being
1486: \ loaded. If the current input source is no (stream) file, the
1487: \ result is undefined.
1488: loadfilename 2@ ;
1489:
1490: : sourceline# ( -- u ) \ gforth sourceline-number
1491: \ the line number of the line that is currently being interpreted
1492: \ from a (stream) file. The first line has the number 1. If the
1493: \ current input source is no (stream) file, the result is
1494: \ undefined.
1495: loadline @ ;
1496:
1.42 anton 1497: : init-included-files ( -- )
1498: image-included-files 2@ 2* cells save-string drop ( addr )
1499: image-included-files 2@ nip included-files 2! ;
1.27 anton 1500:
1.42 anton 1501: : included? ( c-addr u -- f ) \ gforth
1.27 anton 1502: \ true, iff filename c-addr u is in included-files
1503: included-files 2@ 0
1504: ?do ( c-addr u addr )
1505: dup >r 2@ 2over compare 0=
1506: if
1507: 2drop rdrop unloop
1508: true EXIT
1509: then
1510: r> cell+ cell+
1511: loop
1512: 2drop drop false ;
1513:
1.42 anton 1514: : add-included-file ( c-addr u -- ) \ gforth
1.27 anton 1515: \ add name c-addr u to included-files
1516: included-files 2@ tuck 1+ 2* cells resize throw
1517: swap 2dup 1+ included-files 2!
1518: 2* cells + 2! ;
1519:
1.42 anton 1520: : save-string ( addr1 u -- addr2 u ) \ gforth
1521: \ !! not a string, but a memblock word
1.27 anton 1522: swap >r
1523: dup allocate throw
1524: swap 2dup r> -rot move ;
1525:
1.42 anton 1526: : included1 ( i*x file-id c-addr u -- j*x ) \ gforth
1.27 anton 1527: \ include the file file-id with the name given by c-addr u
1.46 anton 1528: loadfilename# @ >r
1529: save-string add-included-file ( file-id )
1530: included-files 2@ nip 1- loadfilename# !
1.20 pazsan 1531: ['] include-file catch
1.46 anton 1532: r> loadfilename# !
1533: throw ;
1.27 anton 1534:
1.43 anton 1535: : included ( i*x addr u -- j*x ) \ file
1.27 anton 1536: open-path-file included1 ;
1537:
1.42 anton 1538: : required ( i*x addr u -- j*x ) \ gforth
1.27 anton 1539: \ include the file with the name given by addr u, if it is not
1540: \ included already. Currently this works by comparing the name of
1541: \ the file (with path) against the names of earlier included
1542: \ files; however, it would probably be better to fstat the file,
1543: \ and compare the device and inode. The advantages would be: no
1544: \ problems with several paths to the same file (e.g., due to
1545: \ links) and we would catch files included with include-file and
1546: \ write a require-file.
1547: open-path-file 2dup included?
1548: if
1549: 2drop close-file throw
1550: else
1551: included1
1552: then ;
1.1 anton 1553:
1554: \ HEX DECIMAL 2may93jaw
1555:
1.42 anton 1556: : decimal ( -- ) \ core
1557: a base ! ;
1558: : hex ( -- ) \ core-ext
1559: 10 base ! ;
1.1 anton 1560:
1561: \ DEPTH 9may93jaw
1562:
1.42 anton 1563: : depth ( -- +n ) \ core
1564: sp@ s0 @ swap - cell / ;
1565: : clearstack ( ... -- )
1566: s0 @ sp! ;
1.1 anton 1567:
1568: \ INCLUDE 9may93jaw
1569:
1.42 anton 1570: : include ( "file" -- ) \ gforth
1.20 pazsan 1571: name included ;
1.27 anton 1572:
1.42 anton 1573: : require ( "file" -- ) \ gforth
1.27 anton 1574: name required ;
1.1 anton 1575:
1576: \ RECURSE 17may93jaw
1577:
1.43 anton 1578: : recurse ( compilation -- ; run-time ?? -- ?? ) \ core
1.10 anton 1579: lastxt compile, ; immediate restrict
1.59 ! anton 1580: ' reveal alias recursive ( -- ) \ gforth
! 1581: immediate
1.1 anton 1582:
1583: \ */MOD */ 17may93jaw
1584:
1.13 anton 1585: \ !! I think */mod should have the same rounding behaviour as / - anton
1.42 anton 1586: : */mod ( n1 n2 n3 -- n4 n5 ) \ core star-slash-mod
1587: >r m* r> sm/rem ;
1.1 anton 1588:
1.42 anton 1589: : */ ( n1 n2 n3 -- n4 ) \ core star-slash
1590: */mod nip ;
1.1 anton 1591:
1592: \ EVALUATE 17may93jaw
1593:
1.42 anton 1594: : evaluate ( c-addr len -- ) \ core,block
1.47 pazsan 1595: push-file #tib ! >tib !
1.12 pazsan 1596: >in off blk off loadfile off -1 loadline !
1.17 pazsan 1597: ['] interpret catch
1598: pop-file throw ;
1.1 anton 1599:
1.42 anton 1600: : abort ( ?? -- ?? ) \ core,exception-ext
1601: -1 throw ;
1.1 anton 1602:
1603: \+ environment? true ENV" CORE"
1604: \ core wordset is now complete!
1605:
1606: \ Quit 13feb93py
1607:
1608: Defer 'quit
1609: Defer .status
1610: : prompt state @ IF ." compiled" EXIT THEN ." ok" ;
1611: : (quit) BEGIN .status cr query interpret prompt AGAIN ;
1612: ' (quit) IS 'quit
1613:
1614: \ DOERROR (DOERROR) 13jun93jaw
1615:
1.18 pazsan 1616: 8 Constant max-errors
1617: Variable error-stack 0 error-stack !
1618: max-errors 6 * cells allot
1619: \ format of one cell:
1620: \ source ( addr u )
1621: \ >in
1622: \ line-number
1623: \ Loadfilename ( addr u )
1624:
1.42 anton 1625: : dec. ( n -- ) \ gforth
1.10 anton 1626: \ print value in decimal representation
1627: base @ decimal swap . base ! ;
1628:
1.42 anton 1629: : typewhite ( addr u -- ) \ gforth
1.10 anton 1630: \ like type, but white space is printed instead of the characters
1.18 pazsan 1631: bounds ?do
1632: i c@ 9 = if \ check for tab
1.10 anton 1633: 9
1634: else
1635: bl
1636: then
1637: emit
1.42 anton 1638: loop ;
1.10 anton 1639:
1.1 anton 1640: DEFER DOERROR
1641:
1.18 pazsan 1642: : .error-frame ( addr1 u1 n1 n2 addr2 u2 -- )
1643: cr error-stack @
1644: IF
1645: ." in file included from "
1646: type ." :" dec. drop 2drop
1647: ELSE
1648: type ." :" dec.
1649: cr dup 2over type cr drop
1.20 pazsan 1650: nip -trailing 1- ( line-start index2 )
1.18 pazsan 1651: 0 >r BEGIN
1.20 pazsan 1652: 2dup + c@ bl > WHILE
1653: r> 1+ >r 1- dup 0< UNTIL THEN 1+
1.18 pazsan 1654: ( line-start index1 )
1655: typewhite
1656: r> 1 max 0 ?do \ we want at least one "^", even if the length is 0
1657: [char] ^ emit
1658: loop
1659: THEN
1660: ;
1661:
1.1 anton 1662: : (DoError) ( throw-code -- )
1.48 anton 1663: sourceline# IF
1664: source >in @ sourceline# 0 0 .error-frame
1.18 pazsan 1665: THEN
1666: error-stack @ 0 ?DO
1667: -1 error-stack +!
1668: error-stack dup @ 6 * cells + cell+
1669: 6 cells bounds DO
1670: I @
1671: cell +LOOP
1672: .error-frame
1673: LOOP
1674: dup -2 =
1675: IF
1676: "error @ ?dup
1677: IF
1678: cr count type
1679: THEN
1680: drop
1681: ELSE
1682: .error
1683: THEN
1684: normal-dp dpp ! ;
1.1 anton 1685:
1686: ' (DoError) IS DoError
1687:
1.42 anton 1688: : quit ( ?? -- ?? ) \ core
1689: r0 @ rp! handler off >tib @ >r
1690: BEGIN
1691: postpone [
1692: ['] 'quit CATCH dup
1693: WHILE
1.47 pazsan 1694: DoError r@ >tib ! r@ tibstack !
1.42 anton 1695: REPEAT
1696: drop r> >tib ! ;
1.1 anton 1697:
1698: \ Cold 13feb93py
1699:
1.50 anton 1700: \ : .name ( name -- ) name>string type space ;
1.1 anton 1701: \ : words listwords @
1702: \ BEGIN @ dup WHILE dup .name REPEAT drop ;
1703:
1.42 anton 1704: : cstring>sstring ( cstring -- addr n ) \ gforth cstring-to-sstring
1705: -1 0 scan 0 swap 1+ /string ;
1706: : arg ( n -- addr count ) \ gforth
1707: cells argv @ + @ cstring>sstring ;
1.1 anton 1708: : #! postpone \ ; immediate
1709:
1.19 anton 1710: Create pathstring 2 cells allot \ string
1711: Create pathdirs 2 cells allot \ dir string array, pointer and count
1.1 anton 1712: Variable argv
1713: Variable argc
1714:
1.12 pazsan 1715: 0 Value script? ( -- flag )
1716:
1.19 anton 1717: : process-path ( addr1 u1 -- addr2 u2 )
1718: \ addr1 u1 is a path string, addr2 u2 is an array of dir strings
1.44 pazsan 1719: align here >r
1.19 anton 1720: BEGIN
1721: over >r [char] : scan
1722: over r> tuck - ( rest-str this-str )
1723: dup
1724: IF
1725: 2dup 1- chars + c@ [char] / <>
1726: IF
1727: 2dup chars + [char] / swap c!
1728: 1+
1729: THEN
1730: 2,
1731: ELSE
1732: 2drop
1733: THEN
1734: dup
1735: WHILE
1736: 1 /string
1737: REPEAT
1738: 2drop
1739: here r> tuck - 2 cells / ;
1740:
1.32 anton 1741: : do-option ( addr1 len1 addr2 len2 -- n )
1742: 2swap
1743: 2dup s" -e" compare 0= >r
1744: 2dup s" --evaluate" compare 0= r> or
1745: IF 2drop dup >r ['] evaluate catch
1746: ?dup IF dup >r DoError r> negate (bye) THEN
1747: r> >tib +! 2 EXIT THEN
1748: ." Unknown option: " type cr 2drop 1 ;
1.12 pazsan 1749:
1.34 anton 1750: : process-args ( -- )
1751: >tib @ >r
1.19 anton 1752: argc @ 1
1753: ?DO
1754: I arg over c@ [char] - <>
1755: IF
1.35 anton 1756: required 1
1.19 anton 1757: ELSE
1.40 pazsan 1758: I 1+ argc @ = IF s" " ELSE I 1+ arg THEN
1759: do-option
1.19 anton 1760: THEN
1.25 pazsan 1761: +LOOP
1762: r> >tib ! ;
1.1 anton 1763:
1.24 pazsan 1764: Defer 'cold ' noop IS 'cold
1765:
1.42 anton 1766: : cold ( -- ) \ gforth
1.52 anton 1767: stdout TO outfile-id
1.25 pazsan 1768: pathstring 2@ process-path pathdirs 2!
1.42 anton 1769: init-included-files
1.24 pazsan 1770: 'cold
1.10 anton 1771: argc @ 1 >
1.12 pazsan 1772: IF
1.40 pazsan 1773: true to script?
1.12 pazsan 1774: ['] process-args catch ?dup
1.10 anton 1775: IF
1.12 pazsan 1776: dup >r DoError cr r> negate (bye)
1.10 anton 1777: THEN
1.40 pazsan 1778: cr
1.10 anton 1779: THEN
1.40 pazsan 1780: false to script?
1.50 anton 1781: ." GForth " version-string type ." , Copyright (C) 1994-1996 Free Software Foundation, Inc." cr
1.43 anton 1782: ." GForth comes with ABSOLUTELY NO WARRANTY; for details type `license'" cr
1.13 anton 1783: ." Type `bye' to exit"
1.26 pazsan 1784: loadline off quit ;
1.1 anton 1785:
1.42 anton 1786: : license ( -- ) \ gforth
1787: cr
1.12 pazsan 1788: ." This program is free software; you can redistribute it and/or modify" cr
1789: ." it under the terms of the GNU General Public License as published by" cr
1.13 anton 1790: ." the Free Software Foundation; either version 2 of the License, or" cr
1791: ." (at your option) any later version." cr cr
1.12 pazsan 1792:
1793: ." This program is distributed in the hope that it will be useful," cr
1794: ." but WITHOUT ANY WARRANTY; without even the implied warranty of" cr
1795: ." MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the" cr
1796: ." GNU General Public License for more details." cr cr
1797:
1798: ." You should have received a copy of the GNU General Public License" cr
1799: ." along with this program; if not, write to the Free Software" cr
1800: ." Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA." cr ;
1801:
1.19 anton 1802: : boot ( path **argv argc -- )
1803: argc ! argv ! cstring>sstring pathstring 2! main-task up!
1.47 pazsan 1804: sp@ dup s0 ! $10 + dup >tib ! tibstack ! #tib off >in off
1.49 pazsan 1805: rp@ r0 ! fp@ f0 ! ['] cold catch DoError bye ;
1.1 anton 1806:
1.42 anton 1807: : bye ( -- ) \ tools-ext
1808: script? 0= IF cr THEN 0 (bye) ;
1.1 anton 1809:
1810: \ **argv may be scanned by the C starter to get some important
1811: \ information, as -display and -geometry for an X client FORTH
1812: \ or space and stackspace overrides
1813:
1814: \ 0 arg contains, however, the name of the program.
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