Annotation of gforth/see.fs, revision 1.47
1.1 anton 1: \ SEE.FS highend SEE for ANSforth 16may93jaw
2:
1.30 anton 3: \ Copyright (C) 1995,2000 Free Software Foundation, Inc.
1.9 anton 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
1.31 anton 19: \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
1.9 anton 20:
21:
1.1 anton 22: \ May be cross-compiled
23:
24: \ I'm sorry. This is really not "forthy" enough.
25:
26: \ Ideas: Level should be a stack
27:
1.18 jwilke 28: require look.fs
1.10 anton 29: require termsize.fs
1.18 jwilke 30: require wordinfo.fs
1.32 anton 31: [IFUNDEF] .name
32: : id. ( nt -- ) \ gforth
33: \G Print the name of the word represented by @var{nt}.
34: \ this name comes from fig-Forth
35: name>string type space ;
36:
37: ' id. alias .id ( nt -- )
38: \G F83 name for @code{id.}.
39:
40: ' id. alias .name ( nt -- )
41: \G Gforth <=0.5.0 name for @code{id.}.
42:
43: [THEN]
1.10 anton 44:
1.1 anton 45: decimal
46:
47: \ Screen format words 16may93jaw
48:
49: VARIABLE C-Output 1 C-Output !
50: VARIABLE C-Formated 1 C-Formated !
51: VARIABLE C-Highlight 0 C-Highlight !
52: VARIABLE C-Clearline 0 C-Clearline !
53:
54: VARIABLE XPos
55: VARIABLE YPos
56: VARIABLE Level
57:
58: : Format C-Formated @ C-Output @ and
59: IF dup spaces XPos +! ELSE drop THEN ;
60:
61: : level+ 7 Level +!
62: Level @ XPos @ -
63: dup 0> IF Format ELSE drop THEN ;
64:
65: : level- -7 Level +! ;
66:
67: VARIABLE nlflag
1.15 pazsan 68: VARIABLE uppercase \ structure words are in uppercase
1.1 anton 69:
70: DEFER nlcount ' noop IS nlcount
71:
72: : nl nlflag on ;
73: : (nl) nlcount
1.18 jwilke 74: XPos @ Level @ = IF EXIT THEN \ ?Exit
1.1 anton 75: C-Formated @ IF
76: C-Output @
1.10 anton 77: IF C-Clearline @ IF cols XPos @ - spaces
1.1 anton 78: ELSE cr THEN
79: 1 YPos +! 0 XPos !
80: Level @ spaces
81: THEN Level @ XPos ! THEN ;
82:
83: : warp? ( len -- len )
84: nlflag @ IF (nl) nlflag off THEN
1.10 anton 85: XPos @ over + cols u>= IF (nl) THEN ;
1.1 anton 86:
1.22 crook 87: : c-to-upper ( c1 -- c2 ) \ gforth
88: \ nac05feb1999 there is a primitive, toupper, with this function
89: dup [char] a >= over [char] z <= and if bl - then ;
1.15 pazsan 90:
1.1 anton 91: : ctype ( adr len -- )
1.15 pazsan 92: warp? dup XPos +! C-Output @
93: IF uppercase @ IF bounds ?DO i c@ c-to-upper emit LOOP
94: uppercase off ELSE type THEN
95: ELSE 2drop THEN ;
1.1 anton 96:
97: : cemit 1 warp?
98: over bl = Level @ XPos @ = and
99: IF 2drop ELSE XPos +! C-Output @ IF emit ELSE drop THEN
100: THEN ;
101:
1.34 anton 102: DEFER .string ( c-addr u n -- )
1.1 anton 103:
104: [IFDEF] Green
105: VARIABLE Colors Colors on
106:
107: : (.string) ( c-addr u n -- )
108: over warp? drop
109: Colors @
110: IF C-Highlight @ ?dup
111: IF CT@ swap CT@ or
112: ELSE CT@
113: THEN
114: attr! ELSE drop THEN
115: ctype ct @ attr! ;
116: [ELSE]
117: : (.string) ( c-addr u n -- )
118: drop ctype ;
119: [THEN]
120:
121: ' (.string) IS .string
122:
1.45 anton 123: : c-\type ( c-addr u -- )
124: \ type string in \-escaped form
125: begin
126: dup while
127: 2dup newline string-prefix? if
128: '\ cemit 'n cemit
129: newline nip /string
130: else
131: over c@
132: dup '" = over '\ = or if
133: '\ cemit cemit
134: else
135: dup bl 127 within if
136: cemit
137: else
138: base @ >r try
139: 8 base ! 0 <<# # # # '\ hold #> ctype #>> 0
140: recover
141: endtry
142: r> base ! throw
143: endif
144: endif
145: 1 /string
146: endif
147: repeat
148: 2drop ;
1.1 anton 149:
1.15 pazsan 150: : .struc
151: uppercase on Str# .string ;
1.1 anton 152:
1.17 jwilke 153: \ CODES (Branchtypes) 15may93jaw
1.1 anton 154:
155: 21 CONSTANT RepeatCode
156: 22 CONSTANT AgainCode
157: 23 CONSTANT UntilCode
158: \ 09 CONSTANT WhileCode
159: 10 CONSTANT ElseCode
160: 11 CONSTANT AheadCode
161: 13 CONSTANT WhileCode2
162: 14 CONSTANT Disable
1.17 jwilke 163: 15 CONSTANT LeaveCode
164:
1.1 anton 165:
166: \ FORMAT WORDS 13jun93jaw
167:
168: VARIABLE C-Stop
169: VARIABLE Branches
170:
1.17 jwilke 171: VARIABLE BranchPointer \ point to the end of branch table
1.1 anton 172: VARIABLE SearchPointer
1.17 jwilke 173:
174: \ The branchtable consists of three entrys:
175: \ address of branch , branch destination , branch type
176:
1.25 pazsan 177: CREATE BranchTable 128 cells allot
1.1 anton 178: here 3 cells -
179: ACONSTANT MaxTable
180:
181: : FirstBranch BranchTable cell+ SearchPointer ! ;
182:
1.17 jwilke 183: : (BranchAddr?) ( a-addr1 -- a-addr2 true | false )
184: \ searches a branch with destination a-addr1
185: \ a-addr1: branch destination
186: \ a-addr2: pointer in branch table
1.1 anton 187: SearchPointer @
188: BEGIN dup BranchPointer @ u<
189: WHILE
190: dup @ 2 pick <>
191: WHILE 3 cells +
192: REPEAT
193: nip dup 3 cells + SearchPointer ! true
194: ELSE
195: 2drop false
196: THEN ;
197:
198: : BranchAddr?
199: FirstBranch (BranchAddr?) ;
200:
201: ' (BranchAddr?) ALIAS MoreBranchAddr?
202:
203: : CheckEnd ( a-addr -- true | false )
204: BranchTable cell+
205: BEGIN dup BranchPointer @ u<
206: WHILE
207: dup @ 2 pick u<=
208: WHILE 3 cells +
209: REPEAT
210: 2drop false
211: ELSE
212: 2drop true
213: THEN ;
214:
1.17 jwilke 215: : MyBranch ( a-addr -- a-addr a-addr2 )
216: \ finds branch table entry for branch at a-addr
1.45 anton 217: dup @
1.17 jwilke 218: BranchAddr?
219: BEGIN
220: WHILE 1 cells - @
221: over <>
1.45 anton 222: WHILE dup @
1.17 jwilke 223: MoreBranchAddr?
224: REPEAT
225: SearchPointer @ 3 cells -
226: ELSE true ABORT" SEE: Table failure"
227: THEN ;
228:
1.1 anton 229: \
230: \ addrw addrt
231: \ BEGIN ... WHILE ... AGAIN ... THEN
232: \ ^ ! ! ^
233: \ ----------+--------+ !
234: \ ! !
235: \ +-------------------+
236: \
237: \
238:
239: : CheckWhile ( a-addrw a-addrt -- true | false )
240: BranchTable
241: BEGIN dup BranchPointer @ u<
242: WHILE dup @ 3 pick u>
243: over @ 3 pick u< and
244: IF dup cell+ @ 3 pick u<
245: IF 2drop drop true EXIT THEN
246: THEN
247: 3 cells +
248: REPEAT
249: 2drop drop false ;
250:
251: : ,Branch ( a-addr -- )
252: BranchPointer @ dup MaxTable u> ABORT" SEE: Table overflow"
253: !
254: 1 cells BranchPointer +! ;
255:
256: : Type! ( u -- )
257: BranchPointer @ 1 cells - ! ;
258:
259: : Branch! ( a-addr rel -- a-addr )
1.45 anton 260: over ,Branch ,Branch 0 ,Branch ;
261: \ over + over ,Branch ,Branch 0 ,Branch ;
1.1 anton 262:
263: \ DEFER CheckUntil
264: VARIABLE NoOutput
265: VARIABLE C-Pass
266:
267: 0 CONSTANT ScanMode
268: 1 CONSTANT DisplayMode
269: 2 CONSTANT DebugMode
270:
271: : Scan? ( -- flag ) C-Pass @ 0= ;
272: : Display? ( -- flag ) C-Pass @ 1 = ;
273: : Debug? ( -- flag ) C-Pass @ 2 = ;
274:
1.45 anton 275: : back? ( addr target -- addr flag )
276: over u< ;
1.1 anton 277:
1.47 ! anton 278: : .word ( addr x -- addr )
! 279: \ print x as a word if possible
! 280: dup look 0= IF
! 281: drop dup threaded>name 0= if
! 282: 2drop dup 1 cells - @ dup body> look
! 283: IF
! 284: nip dup ." <" name>string rot wordinfo .string ." > "
! 285: ELSE
! 286: drop ." <" 0 .r ." > "
! 287: THEN
! 288: EXIT
! 289: then
! 290: THEN
! 291: nip dup cell+ @ immediate-mask and
! 292: IF
! 293: bl cemit ." POSTPONE "
! 294: THEN
! 295: dup name>string rot wordinfo .string
! 296: ;
1.35 pazsan 297:
1.44 anton 298: : c-call ( addr1 -- addr2 )
299: Display? IF
300: dup @ body> .word bl cemit
301: THEN
302: cell+ ;
303:
304: : c-callxt ( addr1 -- addr2 )
305: Display? IF
306: dup @ .word bl cemit
307: THEN
308: cell+ ;
309:
310: \ here docon: , docol: , dovar: , douser: , dodefer: , dofield: ,
311: \ here over - 2constant doers
312:
313: : c-lit ( addr1 -- addr2 )
314: Display? IF
315: dup @ dup body> dup cfaligned over = swap in-dictionary? and if
316: ( addr1 addr1@ )
317: dup body> @ dovar: = if
318: drop c-call EXIT
319: endif
320: endif
321: \ !! test for cfa here, and print "['] ..."
322: dup abs 0 <# #S rot sign #> 0 .string bl cemit
323: endif
324: cell+ ;
325:
326: : c-lit+ ( addr1 -- addr2 )
327: Display? if
328: dup @ dup abs 0 <# #S rot sign #> 0 .string bl cemit
329: s" + " 0 .string
330: endif
331: cell+ ;
1.35 pazsan 332:
1.18 jwilke 333: : .name-without ( addr -- addr )
1.45 anton 334: \ prints a name without a() e.g. a(+LOOP) or (s")
1.47 ! anton 335: dup 1 cells - @ threaded>name IF
1.45 anton 336: name>string over c@ 'a = IF
337: 1 /string
338: THEN
339: over c@ '( = IF
340: 1 /string
341: THEN
342: 2dup + 1- c@ ') = IF 1- THEN .struc ELSE drop
343: THEN ;
1.1 anton 344:
1.45 anton 345: [ifdef] (s")
1.1 anton 346: : c-c"
1.18 jwilke 347: Display? IF nl .name-without THEN
1.1 anton 348: count 2dup + aligned -rot
349: Display?
1.18 jwilke 350: IF bl cemit 0 .string
1.1 anton 351: [char] " cemit bl cemit
352: ELSE 2drop
353: THEN ;
1.45 anton 354: [endif]
1.1 anton 355:
1.45 anton 356: : c-string? ( addr1 -- addr2 f )
357: \ f is true if a string was found and decompiled.
358: \ if f is false, addr2=addr1
359: \ recognizes the following patterns:
360: \ c": ahead X: len string then lit X
361: \ s\": ahead X: string then lit X lit len
362: \ .\": ahead X: string then lit X lit len type
363: \ !! not recognized anywhere:
364: \ abort": if ahead X: len string then lit X c(abort") then
365: dup @ back? if false exit endif
366: dup @ >r
367: r@ @ decompile-prim ['] lit xt>threaded <> if rdrop false exit endif
368: r@ cell+ @ over cell+ <> if rdrop false exit endif
369: \ we have at least C"
370: r@ 2 cells + @ decompile-prim ['] lit xt>threaded = if
371: r@ 3 cells + @ over cell+ + aligned r@ = if
372: \ we have at least s"
373: r@ 4 cells + @ decompile-prim ['] lit-perform xt>threaded =
374: r@ 5 cells + @ ['] type >body = and if
375: 6 s\" .\\\" "
376: else
377: 4 s\" s\\\" "
378: endif
379: \ !! make newline if string too long?
380: display? if
381: 0 .string r@ cell+ @ r@ 3 cells + @ c-\type '" cemit bl cemit
382: else
383: 2drop
384: endif
385: nip cells r> + true exit
386: endif
387: endif
388: \ !! check if count matches space?
389: display? if
390: s\" c\" " 0 .string r@ cell+ @ count 0 .string '" cemit bl cemit
391: endif
392: drop r> 2 cells + true ;
1.1 anton 393:
1.17 jwilke 394: : Forward? ( a-addr true | false -- a-addr true | false )
1.45 anton 395: \ a-addr is pointer into branch table
396: \ returns true when jump is a forward jump
397: IF
398: dup dup @ swap 1 cells - @ u> IF
399: true
400: ELSE
401: drop false
402: THEN
403: \ only if forward jump
404: ELSE
405: false
406: THEN ;
1.1 anton 407:
1.17 jwilke 408: : RepeatCheck ( a-addr1 a-addr2 true | false -- false )
1.1 anton 409: IF BEGIN 2dup
1.45 anton 410: 1 cells - @ swap @
1.1 anton 411: u<=
412: WHILE drop dup cell+
413: MoreBranchAddr? 0=
414: UNTIL false
415: ELSE true
416: THEN
417: ELSE false
418: THEN ;
419:
1.45 anton 420: : c-branch ( addr1 -- addr2 )
421: c-string? ?exit
1.1 anton 422: Scan?
423: IF dup @ Branch!
424: dup @ back?
425: IF \ might be: AGAIN, REPEAT
426: dup cell+ BranchAddr? Forward?
427: RepeatCheck
428: IF RepeatCode Type!
429: cell+ Disable swap !
430: ELSE AgainCode Type!
431: THEN
432: ELSE dup cell+ BranchAddr? Forward?
433: IF ElseCode Type! drop
434: ELSE AheadCode Type!
435: THEN
436: THEN
437: THEN
438: Display?
439: IF
440: dup @ back?
441: IF \ might be: AGAIN, REPEAT
442: level- nl
443: dup cell+ BranchAddr? Forward?
444: RepeatCheck
445: IF drop S" REPEAT " .struc nl
446: ELSE S" AGAIN " .struc nl
447: THEN
1.17 jwilke 448: ELSE MyBranch cell+ @ LeaveCode =
449: IF S" LEAVE " .struc
450: ELSE
451: dup cell+ BranchAddr? Forward?
452: IF dup cell+ @ WhileCode2 =
453: IF nl S" ELSE" .struc level+
454: ELSE level- nl S" ELSE" .struc level+ THEN
455: cell+ Disable swap !
456: ELSE S" AHEAD" .struc level+
457: THEN
458: THEN
1.1 anton 459: THEN
460: THEN
461: Debug?
462: IF dup @ +
463: ELSE cell+
464: THEN ;
465:
466: : DebugBranch
467: Debug?
468: IF dup @ over + swap THEN ; \ return 2 different addresses
469:
470: : c-?branch
471: Scan?
472: IF dup @ Branch!
473: dup @ Back?
474: IF UntilCode Type! THEN
475: THEN
476: Display?
477: IF dup @ Back?
478: IF level- nl S" UNTIL " .struc nl
479: ELSE dup dup @ over +
480: CheckWhile
481: IF MyBranch
482: cell+ dup @ 0=
483: IF WhileCode2 swap !
484: ELSE drop THEN
485: level- nl
1.8 pazsan 486: S" WHILE " .struc
1.1 anton 487: level+
1.17 jwilke 488: ELSE MyBranch cell+ @ LeaveCode =
489: IF s" 0= ?LEAVE " .struc
490: ELSE nl S" IF " .struc level+
491: THEN
1.1 anton 492: THEN
493: THEN
494: THEN
495: DebugBranch
496: cell+ ;
497:
498: : c-for
499: Display? IF nl S" FOR" .struc level+ THEN ;
500:
501: : c-loop
1.15 pazsan 502: Display? IF level- nl .name-without bl cemit nl THEN
1.17 jwilke 503: DebugBranch cell+
504: Scan?
505: IF dup BranchAddr?
506: BEGIN WHILE cell+ LeaveCode swap !
507: dup MoreBranchAddr?
508: REPEAT
509: THEN
510: cell+ ;
1.1 anton 511:
1.15 pazsan 512: : c-do
513: Display? IF nl .name-without level+ THEN ;
1.1 anton 514:
1.45 anton 515: : c-?do ( addr1 -- addr2 )
516: Display? IF
517: nl .name-without level+
518: THEN
519: DebugBranch cell+ ;
1.8 pazsan 520:
1.1 anton 521: : c-exit dup 1 cells -
522: CheckEnd
523: IF Display? IF nlflag off S" ;" Com# .string THEN
524: C-Stop on
525: ELSE Display? IF S" EXIT " .struc THEN
526: THEN
527: Debug? IF drop THEN ;
528:
529: : c-abort"
530: count 2dup + aligned -rot
531: Display?
532: IF S" ABORT" .struc
533: [char] " cemit bl cemit 0 .string
534: [char] " cemit bl cemit
535: ELSE 2drop
536: THEN ;
537:
1.23 jwilke 538: [IFDEF] (does>)
539: : c-does> \ end of create part
540: Display? IF S" DOES> " Com# .string THEN
541: maxaligned /does-handler + ;
542: [THEN]
543:
544: [IFDEF] (compile)
545: : c-(compile)
546: Display?
547: IF
548: s" POSTPONE " Com# .string
549: dup @ look 0= ABORT" SEE: No valid XT"
550: name>string 0 .string bl cemit
551: THEN
552: cell+ ;
553: [THEN]
1.1 anton 554:
555: CREATE C-Table
1.18 jwilke 556: ' lit A, ' c-lit A,
1.44 anton 557: ' does-exec A, ' c-callxt A,
558: ' lit@ A, ' c-call A,
1.37 pazsan 559: [IFDEF] call ' call A, ' c-call A, [THEN]
1.44 anton 560: \ ' useraddr A, ....
561: ' lit-perform A, ' c-call A,
562: ' lit+ A, ' c-lit+ A,
1.42 anton 563: [IFDEF] (s") ' (s") A, ' c-c" A, [THEN]
564: [IFDEF] (.") ' (.") A, ' c-c" A, [THEN]
565: [IFDEF] "lit ' "lit A, ' c-c" A, [THEN]
1.18 jwilke 566: [IFDEF] (c") ' (c") A, ' c-c" A, [THEN]
567: ' (do) A, ' c-do A,
1.46 pazsan 568: [IFDEF] (+do) ' (+do) A, ' c-?do A, [THEN]
569: [IFDEF] (u+do) ' (u+do) A, ' c-?do A, [THEN]
570: [IFDEF] (-do) ' (-do) A, ' c-?do A, [THEN]
571: [IFDEF] (u-do) ' (u-do) A, ' c-?do A, [THEN]
572: ' (?do) A, ' c-?do A,
1.18 jwilke 573: ' (for) A, ' c-for A,
1.46 pazsan 574: ' ?branch A, ' c-?branch A,
575: ' branch A, ' c-branch A,
576: ' (loop) A, ' c-loop A,
577: ' (+loop) A, ' c-loop A,
578: [IFDEF] (s+loop) ' (s+loop) A, ' c-loop A, [THEN]
579: [IFDEF] (-loop) ' (-loop) A, ' c-loop A, [THEN]
580: ' (next) A, ' c-loop A,
1.18 jwilke 581: ' ;s A, ' c-exit A,
1.42 anton 582: [IFDEF] (abort") ' (abort") A, ' c-abort" A, [THEN]
1.23 jwilke 583: \ only defined if compiler is loaded
584: [IFDEF] (compile) ' (compile) A, ' c-(compile) A, [THEN]
585: [IFDEF] (does>) ' (does>) A, ' c-does> A, [THEN]
1.18 jwilke 586: 0 , here 0 ,
1.15 pazsan 587:
588: avariable c-extender
589: c-extender !
1.1 anton 590:
591: \ DOTABLE 15may93jaw
592:
1.44 anton 593: : DoTable ( ca/cfa -- flag )
594: decompile-prim C-Table BEGIN ( cfa table-entry )
595: dup @ dup 0= IF
596: drop cell+ @ dup IF ( next table!)
597: dup @
598: ELSE ( end!)
599: 2drop false EXIT
600: THEN
601: THEN
602: \ jump over to extender, if any 26jan97jaw
603: xt>threaded 2 pick <>
604: WHILE
605: 2 cells +
606: REPEAT
607: nip cell+ perform
608: true
609: ;
1.1 anton 610:
611: : BranchTo? ( a-addr -- a-addr )
1.17 jwilke 612: Display? IF dup BranchAddr?
1.15 pazsan 613: IF
614: BEGIN cell+ @ dup 20 u>
1.1 anton 615: IF drop nl S" BEGIN " .struc level+
616: ELSE
1.17 jwilke 617: dup Disable <> over LeaveCode <> and
1.1 anton 618: IF WhileCode2 =
619: IF nl S" THEN " .struc nl ELSE
620: level- nl S" THEN " .struc nl THEN
621: ELSE drop THEN
622: THEN
623: dup MoreBranchAddr? 0=
624: UNTIL
625: THEN
626: THEN ;
627:
628: : analyse ( a-addr1 -- a-addr2 )
1.34 anton 629: Branches @ IF BranchTo? THEN
630: dup cell+ swap @
631: dup >r DoTable r> swap IF drop EXIT THEN
632: Display?
633: IF
1.35 pazsan 634: .word bl cemit
1.34 anton 635: ELSE
636: drop
637: THEN ;
1.1 anton 638:
639: : c-init
640: 0 YPos ! 0 XPos !
641: 0 Level ! nlflag off
642: BranchTable BranchPointer !
643: c-stop off
644: Branches on ;
645:
646: : makepass ( a-addr -- )
1.14 anton 647: c-stop off
648: BEGIN
649: analyse
650: c-stop @
651: UNTIL drop ;
652:
653: Defer xt-see-xt ( xt -- )
654: \ this one is just a forward declaration for indirect recursion
655:
656: : .defname ( xt c-addr u -- )
657: rot look
658: if ( c-addr u nfa )
659: -rot type space .name
660: else
661: drop ." noname " type
662: then
663: space ;
664:
1.28 anton 665: Defer discode ( addr u -- ) \ gforth
666: \G hook for the disassembler: disassemble code at addr of length u
1.27 anton 667: ' dump IS discode
668:
669: : next-head ( addr1 -- addr2 ) \ gforth
670: \G find the next header starting after addr1, up to here (unreliable).
671: here swap u+do
1.43 anton 672: i head? -2 and if
1.27 anton 673: i unloop exit
674: then
675: cell +loop
676: here ;
677:
678: : umin ( u1 u2 -- u )
679: 2dup u>
680: if
681: swap
682: then
683: drop ;
684:
1.28 anton 685: : next-prim ( addr1 -- addr2 ) \ gforth
686: \G find the next primitive after addr1 (unreliable)
1.27 anton 687: 1+ >r -1 primstart
688: begin ( umin head R: boundary )
689: @ dup
690: while
1.28 anton 691: tuck name>int >code-address ( head1 umin ca R: boundary )
1.27 anton 692: r@ - umin
693: swap
694: repeat
1.28 anton 695: drop dup r@ negate u>=
696: \ "umin+boundary within [0,boundary)" = "umin within [-boundary,0)"
697: if ( umin R: boundary ) \ no primitive found behind -> use a default length
698: drop 31
699: then
700: r> + ;
1.14 anton 701:
702: : seecode ( xt -- )
703: dup s" Code" .defname
1.39 anton 704: >code-address
1.27 anton 705: dup in-dictionary? \ user-defined code word?
706: if
707: dup next-head
708: else
709: dup next-prim
710: then
711: over - discode
712: ." end-code" cr ;
1.14 anton 713: : seevar ( xt -- )
714: s" Variable" .defname cr ;
715: : seeuser ( xt -- )
716: s" User" .defname cr ;
717: : seecon ( xt -- )
718: dup >body ?
719: s" Constant" .defname cr ;
720: : seevalue ( xt -- )
721: dup >body ?
722: s" Value" .defname cr ;
723: : seedefer ( xt -- )
724: dup >body @ xt-see-xt cr
725: dup s" Defer" .defname cr
1.26 anton 726: >name ?dup-if
727: ." IS " .name cr
1.14 anton 728: else
1.26 anton 729: ." lastxt >body !"
1.14 anton 730: then ;
731: : see-threaded ( addr -- )
732: C-Pass @ DebugMode = IF
733: ScanMode c-pass !
734: EXIT
1.10 anton 735: THEN
736: ScanMode c-pass ! dup makepass
737: DisplayMode c-pass ! makepass ;
1.14 anton 738: : seedoes ( xt -- )
739: dup s" create" .defname cr
740: S" DOES> " Com# .string XPos @ Level !
741: >does-code see-threaded ;
742: : seecol ( xt -- )
1.15 pazsan 743: dup s" :" .defname nl
1.14 anton 744: 2 Level !
745: >body see-threaded ;
746: : seefield ( xt -- )
747: dup >body ." 0 " ? ." 0 0 "
748: s" Field" .defname cr ;
749:
1.29 anton 750: : xt-see ( xt -- ) \ gforth
751: \G Decompile the definition represented by @i{xt}.
1.14 anton 752: cr c-init
753: dup >does-code
754: if
755: seedoes EXIT
756: then
1.18 jwilke 757: dup xtprim?
1.14 anton 758: if
759: seecode EXIT
760: then
761: dup >code-address
762: CASE
763: docon: of seecon endof
764: docol: of seecol endof
765: dovar: of seevar endof
1.18 jwilke 766: [ [IFDEF] douser: ]
1.14 anton 767: douser: of seeuser endof
1.18 jwilke 768: [ [THEN] ]
769: [ [IFDEF] dodefer: ]
1.14 anton 770: dodefer: of seedefer endof
1.18 jwilke 771: [ [THEN] ]
772: [ [IFDEF] dofield: ]
1.14 anton 773: dofield: of seefield endof
1.18 jwilke 774: [ [THEN] ]
1.27 anton 775: over of seecode endof \ direct threaded code words
776: over >body of seecode endof \ indirect threaded code words
1.14 anton 777: 2drop abort" unknown word type"
778: ENDCASE ;
779:
780: : (xt-see-xt) ( xt -- )
781: xt-see cr ." lastxt" ;
782: ' (xt-see-xt) is xt-see-xt
783:
784: : (.immediate) ( xt -- )
785: ['] execute = if
786: ." immediate"
787: then ;
788:
789: : name-see ( nfa -- )
790: dup name>int >r
791: dup name>comp
792: over r@ =
793: if \ normal or immediate word
794: swap xt-see (.immediate)
795: else
1.40 anton 796: r@ ['] ticking-compile-only-error =
1.14 anton 797: if \ compile-only word
798: swap xt-see (.immediate) ." compile-only"
799: else \ interpret/compile word
800: r@ xt-see-xt cr
801: swap xt-see-xt cr
802: ." interpret/compile " over .name (.immediate)
803: then
804: then
805: rdrop drop ;
1.3 pazsan 806:
1.21 crook 807: : see ( "<spaces>name" -- ) \ tools
808: \G Locate @var{name} using the current search order. Display the
809: \G definition of @var{name}. Since this is achieved by decompiling
810: \G the definition, the formatting is mechanised and some source
811: \G information (comments, interpreted sequences within definitions
812: \G etc.) is lost.
1.13 anton 813: name find-name dup 0=
814: IF
1.24 anton 815: drop -&13 throw
1.13 anton 816: THEN
1.14 anton 817: name-see ;
1.1 anton 818:
819:
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