Annotation of gforth/kernel/int.fs, revision 1.32
1.1 pazsan 1: \ definitions needed for interpreter only
2:
1.11 anton 3: \ Copyright (C) 1995,1996,1997,1998 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 pazsan 21: \ \ Revision-Log
22:
23: \ put in seperate file 14sep97jaw
24:
25: \ \ input stream primitives 23feb93py
26:
27: : tib ( -- c-addr ) \ core-ext
1.29 crook 28: \G @var{c-addr} is the address of the Terminal Input Buffer.
29: \G OBSOLESCENT: @code{source} superceeds the function of this word.
1.1 pazsan 30: >tib @ ;
31:
1.29 crook 32: Defer source ( -- c-addr u ) \ core
1.1 pazsan 33: \ used by dodefer:, must be defer
1.29 crook 34: \G @var{c-addr} is the address of the input buffer and @var{u} is the
35: \G number of characters in it.
1.1 pazsan 36:
1.29 crook 37: : (source) ( -- c-addr u )
1.1 pazsan 38: tib #tib @ ;
39: ' (source) IS source
40:
41: : (word) ( addr1 n1 char -- addr2 n2 )
42: dup >r skip 2dup r> scan nip - ;
43:
44: \ (word) should fold white spaces
45: \ this is what (parse-white) does
46:
47: \ word parse 23feb93py
48:
1.29 crook 49: : sword ( char -- addr len ) \ gforth s-word
50: \G Parses like @code{word}, but the output is like @code{parse} output
1.3 anton 51: \ this word was called PARSE-WORD until 0.3.0, but Open Firmware and
52: \ dpANS6 A.6.2.2008 have a word with that name that behaves
53: \ differently (like NAME).
1.1 pazsan 54: source 2dup >r >r >in @ over min /string
55: rot dup bl = IF drop (parse-white) ELSE (word) THEN
56: 2dup + r> - 1+ r> min >in ! ;
57:
1.29 crook 58: : word ( char "<chars>ccc<char>-- c-addr ) \ core
59: \G Skip leading delimiters. Parse @var{ccc}, delimited by
60: \G @var{char}, in the parse area. @var{c-addr} is the addres of a
61: \G transient region containing the parsed string in
62: \G counted-strinng format. If the parse area was empty or
63: \G contained no characters other than delimiters, the resulting
64: \G string has zero length. A program may replace characters within
65: \G the counted string. OBSOLESCENT: the counted string has a
66: \G trailing space that is not included in its length.
67: sword here place bl here count + c! here ;
68:
69: : parse ( char "ccc<char>" -- c-addr u ) \ core-ext
70: \G Parse @var{ccc}, delimited by @var{char}, in the parse
71: \G area. @var{c-addr u} specifies the parsed string within the
72: \G parse area. If the parse area was empty, @var{u} is 0.
73: >r source >in @ over min /string over swap r> scan >r
1.1 pazsan 74: over - dup r> IF 1+ THEN >in +! ;
75:
76: \ name 13feb93py
77:
78: [IFUNDEF] (name) \ name might be a primitive
79:
80: : (name) ( -- c-addr count )
81: source 2dup >r >r >in @ /string (parse-white)
82: 2dup + r> - 1+ r> min >in ! ;
83: \ name count ;
84: [THEN]
85:
86: : name-too-short? ( c-addr u -- c-addr u )
87: dup 0= -&16 and throw ;
88:
89: : name-too-long? ( c-addr u -- c-addr u )
90: dup $1F u> -&19 and throw ;
91:
92: \ \ Number parsing 23feb93py
93:
94: \ number? number 23feb93py
95:
96: hex
97: const Create bases 10 , 2 , A , 100 ,
98: \ 16 2 10 character
99:
1.18 anton 100: \ !! protect BASE saving wrapper against exceptions
1.1 pazsan 101: : getbase ( addr u -- addr' u' )
102: over c@ [char] $ - dup 4 u<
103: IF
104: cells bases + @ base ! 1 /string
105: ELSE
106: drop
107: THEN ;
108:
1.20 pazsan 109: : sign? ( addr u -- addr u flag )
1.1 pazsan 110: over c@ '- = dup >r
111: IF
112: 1 /string
113: THEN
1.20 pazsan 114: r> ;
115:
116: : s>unumber? ( addr u -- ud flag )
1.21 pazsan 117: base @ >r dpl on getbase
1.20 pazsan 118: 0. 2swap
1.18 anton 119: BEGIN ( d addr len )
1.1 pazsan 120: dup >r >number dup
1.18 anton 121: WHILE \ there are characters left
1.1 pazsan 122: dup r> -
1.18 anton 123: WHILE \ the last >number parsed something
124: dup 1- dpl ! over c@ [char] . =
125: WHILE \ the current char is '.'
1.1 pazsan 126: 1 /string
1.18 anton 127: REPEAT THEN \ there are unparseable characters left
1.21 pazsan 128: 2drop false
1.20 pazsan 129: ELSE
130: rdrop 2drop true
1.21 pazsan 131: THEN
132: r> base ! ;
1.20 pazsan 133:
134: \ ouch, this is complicated; there must be a simpler way - anton
135: : s>number? ( addr len -- d f )
136: \ converts string addr len into d, flag indicates success
1.21 pazsan 137: sign? >r
1.20 pazsan 138: s>unumber?
139: 0= IF
1.21 pazsan 140: rdrop false
1.18 anton 141: ELSE \ no characters left, all ok
1.20 pazsan 142: r>
1.1 pazsan 143: IF
144: dnegate
145: THEN
1.18 anton 146: true
1.21 pazsan 147: THEN ;
1.1 pazsan 148:
1.18 anton 149: : s>number ( addr len -- d )
150: \ don't use this, there is no way to tell success
151: s>number? drop ;
152:
1.1 pazsan 153: : snumber? ( c-addr u -- 0 / n -1 / d 0> )
1.18 anton 154: s>number? 0=
1.1 pazsan 155: IF
156: 2drop false EXIT
157: THEN
1.18 anton 158: dpl @ dup 0< IF
1.1 pazsan 159: nip
1.18 anton 160: ELSE
161: 1+
1.1 pazsan 162: THEN ;
163:
164: : number? ( string -- string 0 / n -1 / d 0> )
165: dup >r count snumber? dup if
166: rdrop
167: else
168: r> swap
169: then ;
170:
171: : number ( string -- d )
172: number? ?dup 0= abort" ?" 0<
173: IF
174: s>d
175: THEN ;
176:
177: \ \ Comments ( \ \G
178:
1.29 crook 179: : ( ( compilation 'ccc<close-paren>' -- ; run-time -- ) \ thisone- core,file paren
1.17 crook 180: \G ** this will not get annotated. The alias in glocals.fs will instead **
1.29 crook 181: \G It does not work to use "wordset-" prefix since this file is glossed
182: \G by cross.fs which doesn't have the same functionalty as makedoc.fs
1.1 pazsan 183: [char] ) parse 2drop ; immediate
184:
1.29 crook 185: : \ ( -- ) \ thisone- core-ext,block-ext backslash
186: \G ** this will not get annotated. The alias in glocals.fs will instead **
187: \G It does not work to use "wordset-" prefix since this file is glossed
188: \G by cross.fs which doesn't have the same functionalty as makedoc.fs
1.12 pazsan 189: [ has? file [IF] ]
1.1 pazsan 190: blk @
191: IF
192: >in @ c/l / 1+ c/l * >in !
193: EXIT
194: THEN
1.12 pazsan 195: [ [THEN] ]
1.1 pazsan 196: source >in ! drop ; immediate
197:
1.19 crook 198: : \G ( -- ) \ gforth backslash-gee
199: \G Equivalent to @code{\} but used as a tag to annotate definition
200: \G comments into documentation.
1.1 pazsan 201: POSTPONE \ ; immediate
202:
203: \ \ object oriented search list 17mar93py
204:
205: \ word list structure:
206:
207: struct
208: cell% field find-method \ xt: ( c_addr u wid -- nt )
209: cell% field reveal-method \ xt: ( nt wid -- ) \ used by dofield:, must be field
210: cell% field rehash-method \ xt: ( wid -- ) \ re-initializes a "search-data" (hashtables)
211: cell% field hash-method \ xt: ( wid -- ) \ initializes ""
212: \ \ !! what else
213: end-struct wordlist-map-struct
214:
215: struct
1.6 pazsan 216: cell% field wordlist-map \ pointer to a wordlist-map-struct
1.13 anton 217: cell% field wordlist-id \ linked list of words (for WORDS etc.)
1.1 pazsan 218: cell% field wordlist-link \ link field to other wordlists
1.13 anton 219: cell% field wordlist-extend \ wordlist extensions (eg bucket offset)
1.1 pazsan 220: end-struct wordlist-struct
221:
222: : f83find ( addr len wordlist -- nt / false )
1.6 pazsan 223: wordlist-id @ (f83find) ;
1.1 pazsan 224:
225: : initvoc ( wid -- )
226: dup wordlist-map @ hash-method perform ;
227:
228: \ Search list table: find reveal
229: Create f83search ( -- wordlist-map )
230: ' f83find A, ' drop A, ' drop A, ' drop A,
231:
1.6 pazsan 232: here G f83search T A, NIL A, NIL A, NIL A,
1.1 pazsan 233: AValue forth-wordlist \ variable, will be redefined by search.fs
234:
235: AVariable lookup forth-wordlist lookup !
236: \ !! last is user and lookup?! jaw
237: AVariable current ( -- addr ) \ gforth
1.17 crook 238: \G VARIABLE: holds the wid of the current compilation word list.
1.1 pazsan 239: AVariable voclink forth-wordlist wordlist-link voclink !
1.17 crook 240: lookup AValue context ( -- addr ) \ gforth
241: \G VALUE: @code{context} @code{@@} is the wid of the word list at the
242: \G top of the search order stack.
1.1 pazsan 243:
244: forth-wordlist current !
245:
246: \ \ header, finding, ticks 17dec92py
247:
248: $80 constant alias-mask \ set when the word is not an alias!
249: $40 constant immediate-mask
250: $20 constant restrict-mask
251:
252: \ higher level parts of find
253:
254: : flag-sign ( f -- 1|-1 )
255: \ true becomes 1, false -1
256: 0= 2* 1+ ;
257:
258: : compile-only-error ( ... -- )
259: -&14 throw ;
260:
261: : (cfa>int) ( cfa -- xt )
262: [ has? compiler [IF] ]
263: dup interpret/compile?
264: if
265: interpret/compile-int @
266: then
267: [ [THEN] ] ;
268:
269: : (x>int) ( cfa b -- xt )
270: \ get interpretation semantics of name
271: restrict-mask and
272: if
273: drop ['] compile-only-error
274: else
275: (cfa>int)
276: then ;
277:
278: : name>string ( nt -- addr count ) \ gforth head-to-string
279: \g @var{addr count} is the name of the word represented by @var{nt}.
280: cell+ count $1F and ;
281:
282: : ((name>)) ( nfa -- cfa )
283: name>string + cfaligned ;
284:
285: : (name>x) ( nfa -- cfa b )
286: \ cfa is an intermediate cfa and b is the flags byte of nfa
287: dup ((name>))
288: swap cell+ c@ dup alias-mask and 0=
289: IF
290: swap @ swap
291: THEN ;
292:
293: : name>int ( nt -- xt ) \ gforth
1.31 crook 294: \G @i{xt} represents the interpretation semantics of the word
295: \G @i{nt}. If @i{nt} has no interpretation semantics (i.e. is
296: \G @code{compile-only}), @i{xt} is the execution token for
297: \G @code{compile-only-error}, which performs @code{-14 throw}.
1.1 pazsan 298: (name>x) (x>int) ;
299:
300: : name?int ( nt -- xt ) \ gforth
1.31 crook 301: \G Like @code{name>int}, but perform @code{-14 throw} if @i{nt}
302: \G has no interpretation semantics.
1.1 pazsan 303: (name>x) restrict-mask and
304: if
305: compile-only-error \ does not return
306: then
307: (cfa>int) ;
308:
309: : (name>comp) ( nt -- w +-1 ) \ gforth
1.31 crook 310: \G @i{w xt} is the compilation token for the word @i{nt}.
1.1 pazsan 311: (name>x) >r
312: [ has? compiler [IF] ]
313: dup interpret/compile?
314: if
315: interpret/compile-comp @
316: then
317: [ [THEN] ]
318: r> immediate-mask and flag-sign
319: ;
320:
321: : (name>intn) ( nfa -- xt +-1 )
322: (name>x) tuck (x>int) ( b xt )
323: swap immediate-mask and flag-sign ;
324:
1.30 jwilke 325: const Create ??? 0 , 3 c, char ? c, char ? c, char ? c,
326: \ ??? is used by dovar:, must be created/:dovar
327:
328: [IFDEF] forthstart
329: \ if we have a forthstart we can define head? with it
330: \ otherwise leave out the head? check
331:
1.14 anton 332: : head? ( addr -- f )
333: \G heuristic check whether addr is a name token; may deliver false
334: \G positives; addr must be a valid address
335: \ we follow the link fields and check for plausibility; two
336: \ iterations should catch most false addresses: on the first
337: \ iteration, we may get an xt, on the second a code address (or
338: \ some code), which is typically not in the dictionary.
339: 2 0 do
340: dup @ dup
341: if ( addr addr1 )
342: dup rot forthstart within
343: if \ addr1 is outside forthstart..addr, not a head
344: drop false unloop exit
345: then ( addr1 )
346: else \ 0 in the link field, no further checks
347: 2drop true unloop exit
348: then
349: loop
350: \ in dubio pro:
351: drop true ;
352:
353: : >head ( cfa -- nt ) \ gforth to-head
354: $21 cell do ( cfa )
355: dup i - count $9F and + cfaligned over alias-mask + =
356: if ( cfa )
357: dup i - cell - dup head?
358: if
359: nip unloop exit
360: then
361: drop
362: then
363: cell +loop
364: drop ??? ( wouldn't 0 be better? ) ;
1.1 pazsan 365:
1.30 jwilke 366: [ELSE]
367:
368: : >head ( cfa -- nt ) \ gforth to-head
369: $21 cell do ( cfa )
370: dup i - count $9F and + cfaligned over alias-mask + =
371: if ( cfa ) i - cell - unloop exit
372: then
373: cell +loop
374: drop ??? ( wouldn't 0 be better? ) ;
375:
376: [THEN]
377:
1.1 pazsan 378: ' >head ALIAS >name
379:
380: : body> 0 >body - ;
381:
1.31 crook 382: : (search-wordlist) ( addr count wid -- nt | false )
1.1 pazsan 383: dup wordlist-map @ find-method perform ;
384:
1.31 crook 385: : search-wordlist ( c-addr count wid -- 0 | xt +-1 ) \ search
386: \G Search the word list identified by @i{wid}
387: \G for the definition named by the string at @i{c-addr count}.
1.17 crook 388: \G If the definition is not found, return 0. If the definition
389: \G is found return 1 (if the definition is immediate) or -1
1.31 crook 390: \G (if the definition is not immediate) together with the @i{xt}.
391: \G The @i{xt} returned represents the interpretation semantics.
1.1 pazsan 392: (search-wordlist) dup if
393: (name>intn)
394: then ;
395:
1.31 crook 396: : find-name ( c-addr u -- nt | 0 ) \ gforth
397: \g Find the name @i{c-addr u} in the current search
398: \g order. Return its @i{nt}, if found, otherwise 0.
1.1 pazsan 399: lookup @ (search-wordlist) ;
400:
401: : sfind ( c-addr u -- 0 / xt +-1 ) \ gforth-obsolete
402: find-name dup
403: if ( nt )
404: state @
405: if
406: (name>comp)
407: else
408: (name>intn)
409: then
410: then ;
411:
1.31 crook 412: : find ( c-addr -- xt +-1 | c-addr 0 ) \ core,search
1.17 crook 413: \G Search all word lists in the current search order
1.31 crook 414: \G for the definition named by the counted string at @i{c-addr}.
1.17 crook 415: \G If the definition is not found, return 0. If the definition
416: \G is found return 1 (if the definition is immediate) or -1
1.31 crook 417: \G (if the definition is not immediate) together with the @i{xt}.
1.1 pazsan 418: dup count sfind dup
419: if
420: rot drop
421: then ;
422:
423: \ ticks
424:
425: : (') ( "name" -- nt ) \ gforth
1.32 ! anton 426: name name-too-short?
1.28 anton 427: find-name dup 0=
1.1 pazsan 428: IF
429: drop -&13 bounce
430: THEN ;
431:
432: : ' ( "name" -- xt ) \ core tick
1.31 crook 433: \g @i{xt} represents @i{name}'s interpretation
434: \g semantics. Perform @code{-14 throw} if the word has no
1.1 pazsan 435: \g interpretation semantics.
436: (') name?int ;
437:
438: \ \ the interpreter loop mar92py
439:
440: \ interpret 10mar92py
441:
442: Defer parser
443: Defer name ( -- c-addr count ) \ gforth
444: \ get the next word from the input buffer
445: ' (name) IS name
446: Defer compiler-notfound ( c-addr count -- )
447: Defer interpreter-notfound ( c-addr count -- )
448:
449: : no.extensions ( addr u -- )
450: 2drop -&13 bounce ;
451: ' no.extensions IS compiler-notfound
452: ' no.extensions IS interpreter-notfound
453:
454: : interpret ( ?? -- ?? ) \ gforth
455: \ interpret/compile the (rest of the) input buffer
1.24 anton 456: rp@ backtrace-rp0 !
1.1 pazsan 457: BEGIN
458: ?stack name dup
459: WHILE
460: parser
461: REPEAT
462: 2drop ;
463:
464: \ interpreter 30apr92py
465:
466: \ not the most efficient implementations of interpreter and compiler
1.12 pazsan 467: | : interpreter ( c-addr u -- )
1.1 pazsan 468: 2dup find-name dup
469: if
470: nip nip name>int execute
471: else
472: drop
473: 2dup 2>r snumber?
474: IF
475: 2rdrop
476: ELSE
477: 2r> interpreter-notfound
478: THEN
479: then ;
480:
481: ' interpreter IS parser
482:
483: \ \ Query Evaluate 07apr93py
484:
485: has? file 0= [IF]
1.12 pazsan 486: : sourceline# ( -- n ) 1 ;
1.1 pazsan 487: [THEN]
488:
489: : refill ( -- flag ) \ core-ext,block-ext,file-ext
1.29 crook 490: \G Attempt to fill the input buffer from the input source. When
491: \G the input source is the user input device, attempt to receive
492: \G input into the terminal input device. If successful, make the
493: \G result the input buffer, set @code{>IN} to 0 and return true;
494: \G otherwise return false. When the input source is a block, add 1
495: \G to the value of @code{BLK} to make the next block the input
496: \G source and current input buffer, and set @code{>IN} to 0;
497: \G return true if the new value of @code{BLK} is a valid block
498: \G number, false otherwise. When the input source is a text file,
499: \G attempt to read the next line from the file. If successful,
500: \G make the result the current input buffer, set @code{>IN} to 0
501: \G and return true; otherwise, return false. A successful result
502: \G includes receipt of a line containing 0 characters.
1.12 pazsan 503: [ has? file [IF] ]
504: blk @ IF 1 blk +! true 0 >in ! EXIT THEN
505: [ [THEN] ]
506: tib /line
507: [ has? file [IF] ]
508: loadfile @ ?dup
509: IF read-line throw
510: ELSE
511: [ [THEN] ]
512: sourceline# 0< IF 2drop false EXIT THEN
513: accept true
514: [ has? file [IF] ]
515: THEN
516: 1 loadline +!
517: [ [THEN] ]
518: swap #tib ! 0 >in ! ;
1.1 pazsan 519:
520: : query ( -- ) \ core-ext
1.29 crook 521: \G Make the user input device the input source. Receive input into
522: \G the Terminal Input Buffer. Set @code{>IN} to zero. OBSOLESCENT:
523: \G superceeded by @code{accept}.
1.12 pazsan 524: [ has? file [IF] ]
525: blk off loadfile off
526: [ [THEN] ]
1.1 pazsan 527: tib /line accept #tib ! 0 >in ! ;
528:
529: \ save-mem extend-mem
530:
531: has? os [IF]
532: : save-mem ( addr1 u -- addr2 u ) \ gforth
533: \g copy a memory block into a newly allocated region in the heap
534: swap >r
535: dup allocate throw
536: swap 2dup r> -rot move ;
537:
538: : extend-mem ( addr1 u1 u -- addr addr2 u2 )
539: \ extend memory block allocated from the heap by u aus
540: \ the (possibly reallocated piece is addr2 u2, the extension is at addr
541: over >r + dup >r resize throw
542: r> over r> + -rot ;
543: [THEN]
544:
545: \ EVALUATE 17may93jaw
546:
547: has? file 0= [IF]
548: : push-file ( -- ) r>
1.12 pazsan 549: tibstack @ >r >tib @ >r #tib @ >r
1.1 pazsan 550: >tib @ tibstack @ = IF r@ tibstack +! THEN
551: tibstack @ >tib ! >in @ >r >r ;
552:
553: : pop-file ( throw-code -- throw-code )
554: r>
1.12 pazsan 555: r> >in ! r> #tib ! r> >tib ! r> tibstack ! >r ;
1.1 pazsan 556: [THEN]
557:
1.29 crook 558: : evaluate ( c-addr u -- ) \ core,block
559: \G Save the current input source specification. Store -1 in
560: \G @code{source-id} and 0 in @code{blk}. Set @code{>IN} to 0 and
561: \G make the string @var{c-addr u} the input source and input
562: \G buffer. Interpret. When the parse area is empty, restore the
563: \G input source specification.
564: push-file #tib ! >tib !
565: >in off
566: [ has? file [IF] ]
567: blk off loadfile off -1 loadline !
568: [ [THEN] ]
569: ['] interpret catch
570: pop-file throw ;
1.1 pazsan 571:
572: \ \ Quit 13feb93py
573:
574: Defer 'quit
575:
576: Defer .status
577:
578: : prompt state @ IF ." compiled" EXIT THEN ." ok" ;
579:
580: : (Query) ( -- )
1.12 pazsan 581: [ has? file [IF] ]
582: loadfile off blk off loadline off
583: [ [THEN] ]
584: refill drop ;
1.1 pazsan 585:
586: : (quit) BEGIN .status cr (query) interpret prompt AGAIN ;
587:
588: ' (quit) IS 'quit
589:
590: \ \ DOERROR (DOERROR) 13jun93jaw
591:
592: 8 Constant max-errors
593: Variable error-stack 0 error-stack !
594: max-errors 6 * cells allot
595: \ format of one cell:
596: \ source ( addr u )
597: \ >in
598: \ line-number
599: \ Loadfilename ( addr u )
600:
601: : dec. ( n -- ) \ gforth
1.27 crook 602: \G Display @var{n} as a signed decimal number, followed by a space.
1.23 jwilke 603: \G !! not used...
1.1 pazsan 604: base @ decimal swap . base ! ;
605:
1.23 jwilke 606: : dec.r ( u -- ) \ gforth
1.27 crook 607: \G Display @var{u} as a unsigned decimal number
1.23 jwilke 608: base @ decimal swap 0 .r base ! ;
609:
1.1 pazsan 610: : hex. ( u -- ) \ gforth
1.27 crook 611: \G Display @var{u} as an unsigned hex number, prefixed with a "$" and
1.17 crook 612: \G followed by a space.
1.23 jwilke 613: \G !! not used...
1.1 pazsan 614: '$ emit base @ swap hex u. base ! ;
615:
616: : typewhite ( addr u -- ) \ gforth
617: \ like type, but white space is printed instead of the characters
618: bounds ?do
619: i c@ #tab = if \ check for tab
620: #tab
621: else
622: bl
623: then
624: emit
625: loop ;
626:
627: DEFER DOERROR
1.15 anton 628: Defer dobacktrace ( -- )
629: ' noop IS dobacktrace
1.1 pazsan 630:
1.23 jwilke 631: : .error-string ( throw-code -- )
632: dup -2 =
633: IF "error @ ?dup IF count type THEN drop
634: ELSE .error
635: THEN ;
636:
637: : .error-frame ( throwcode addr1 u1 n1 n2 addr2 u2 -- throwcode )
638: \ addr2 u2: filename of included file
639: \ n2: line number
640: \ n1: error position in input line
641: \ addr1 u1: input line
642:
1.1 pazsan 643: cr error-stack @
644: IF
645: ." in file included from "
1.23 jwilke 646: type ." :" dec.r drop 2drop
1.1 pazsan 647: ELSE
1.23 jwilke 648: type ." :" dec.r ." : " 3 pick .error-string cr
649: dup 2over type cr drop
1.1 pazsan 650: nip -trailing 1- ( line-start index2 )
651: 0 >r BEGIN
652: 2dup + c@ bl > WHILE
653: r> 1+ >r 1- dup 0< UNTIL THEN 1+
654: ( line-start index1 )
655: typewhite
656: r> 1 max 0 ?do \ we want at least one "^", even if the length is 0
657: [char] ^ emit
658: loop
1.23 jwilke 659: THEN ;
1.1 pazsan 660:
661: : (DoError) ( throw-code -- )
662: [ has? os [IF] ]
1.8 pazsan 663: >stderr
1.1 pazsan 664: [ [THEN] ]
665: sourceline# IF
1.8 pazsan 666: source >in @ sourceline# 0 0 .error-frame
1.1 pazsan 667: THEN
668: error-stack @ 0 ?DO
669: -1 error-stack +!
670: error-stack dup @ 6 * cells + cell+
671: 6 cells bounds DO
672: I @
673: cell +LOOP
674: .error-frame
675: LOOP
1.26 anton 676: drop dobacktrace
1.8 pazsan 677: normal-dp dpp ! ;
1.1 pazsan 678:
679: ' (DoError) IS DoError
680:
681: : quit ( ?? -- ?? ) \ core
1.27 crook 682: \G Empty the return stack, make the user input device
683: \G the input source, enter interpret state and start
684: \G the text interpreter.
1.5 anton 685: rp0 @ rp! handler off clear-tibstack >tib @ >r
1.1 pazsan 686: BEGIN
687: [ has? compiler [IF] ]
688: postpone [
689: [ [THEN] ]
690: ['] 'quit CATCH dup
691: WHILE
1.22 anton 692: <# \ reset hold area, or we may get another error
1.1 pazsan 693: DoError r@ >tib ! r@ tibstack !
694: REPEAT
695: drop r> >tib ! ;
696:
697: \ \ Cold Boot 13feb93py
698:
699: : (bootmessage)
700: ." GForth " version-string type
1.11 anton 701: ." , Copyright (C) 1998 Free Software Foundation, Inc." cr
1.1 pazsan 702: ." GForth comes with ABSOLUTELY NO WARRANTY; for details type `license'"
703: [ has? os [IF] ]
704: cr ." Type `bye' to exit"
705: [ [THEN] ] ;
706:
707: defer bootmessage
708: defer process-args
709:
710: ' (bootmessage) IS bootmessage
711:
1.10 anton 712: Defer 'cold ( -- ) \ gforth tick-cold
1.1 pazsan 713: \ hook (deferred word) for things to do right before interpreting the
714: \ command-line arguments
715: ' noop IS 'cold
716:
1.30 jwilke 717: include ./../chains.fs
1.1 pazsan 718:
719: Variable init8
720:
721: : cold ( -- ) \ gforth
722: [ has? file [IF] ]
723: pathstring 2@ fpath only-path
724: init-included-files
725: [ [THEN] ]
726: 'cold
727: init8 chainperform
728: [ has? file [IF] ]
1.8 pazsan 729: process-args
1.12 pazsan 730: loadline off
1.1 pazsan 731: [ [THEN] ]
732: bootmessage
1.12 pazsan 733: quit ;
1.1 pazsan 734:
1.5 anton 735: : clear-tibstack ( -- )
736: [ has? glocals [IF] ]
737: lp@ forthstart 7 cells + @ -
738: [ [ELSE] ]
739: [ has? os [IF] ]
1.8 pazsan 740: r0 @ forthstart 6 cells + @ -
1.5 anton 741: [ [ELSE] ]
1.16 pazsan 742: sp@ $10 cells +
1.5 anton 743: [ [THEN] ]
744: [ [THEN] ]
745: dup >tib ! tibstack ! #tib off >in off ;
746:
1.1 pazsan 747: : boot ( path **argv argc -- )
748: main-task up!
749: [ has? os [IF] ]
750: stdout TO outfile-id
1.7 pazsan 751: stdin TO infile-id
1.1 pazsan 752: \ !! [ [THEN] ]
753: \ !! [ has? file [IF] ]
754: argc ! argv ! pathstring 2!
755: [ [THEN] ]
756: sp@ sp0 !
1.5 anton 757: clear-tibstack
1.1 pazsan 758: rp@ rp0 !
759: [ has? floating [IF] ]
760: fp@ fp0 !
761: [ [THEN] ]
1.8 pazsan 762: ['] cold catch DoError cr
1.1 pazsan 763: [ has? os [IF] ]
764: bye
765: [ [THEN] ]
766: ;
767:
768: has? os [IF]
769: : bye ( -- ) \ tools-ext
770: [ has? file [IF] ]
771: script? 0= IF cr THEN
772: [ [ELSE] ]
773: cr
774: [ [THEN] ]
775: 0 (bye) ;
776: [THEN]
777:
778: \ **argv may be scanned by the C starter to get some important
779: \ information, as -display and -geometry for an X client FORTH
780: \ or space and stackspace overrides
781:
782: \ 0 arg contains, however, the name of the program.
783:
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