Annotation of gforth/extend.fs, revision 1.14
1.1 anton 1: \ EXTEND.FS CORE-EXT Word not fully tested! 12may93jaw
2:
1.12 anton 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:
21:
1.1 anton 22: \ May be cross-compiled
23:
24: decimal
25:
26: \ .( 12may93jaw
27:
1.11 anton 28: : .( ( compilation "...<paren>" -- ) \ core-ext dot-paren
1.8 anton 29: [char] ) parse type ; immediate
1.1 anton 30:
31: \ VALUE 2>R 2R> 2R@ 17may93jaw
32:
1.11 anton 33: : value ( w -- ) \ core-ext
1.3 anton 34: (constant) , ;
35: \ !! 2value
1.1 anton 36:
1.11 anton 37: : 2Literal ( compilation w1 w2 -- ; run-time -- w1 w2 ) \ double two-literal
38: swap postpone Literal postpone Literal ; immediate restrict
1.2 pazsan 39:
1.11 anton 40: : m*/ ( d1 n2 u3 -- dqout ) \ double m-star-slash
41: >r s>d >r abs -rot
42: s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um*
43: swap >r 0 d+ r> -rot r@ um/mod -rot r> um/mod nip swap
44: r> IF dnegate THEN ;
1.4 pazsan 45:
1.1 anton 46: \ CASE OF ENDOF ENDCASE 17may93jaw
47:
48: \ just as described in dpANS5
49:
1.11 anton 50: 0 CONSTANT case ( compilation -- case-sys ; run-time -- ) \ core-ext
51: immediate
1.1 anton 52:
1.11 anton 53: : of ( compilation -- of-sys ; run-time x1 x2 -- |x1 ) \ core-ext
54: \ !! the implementation does not match the stack effect
55: 1+ >r
56: postpone over postpone = postpone if postpone drop
57: r> ; immediate
58:
59: : endof ( compilation case-sys1 of-sys -- case-sys2 ; run-time -- ) \ core-ext end-of
60: >r postpone else r> ; immediate
61:
62: : endcase ( compilation case-sys -- ; run-time x -- ) \ core-ext end-case
63: postpone drop
64: 0 ?do postpone then loop ; immediate
1.1 anton 65:
66: \ C" 17may93jaw
67:
68: : (c") "lit ;
69:
1.11 anton 70: : CLiteral
71: postpone (c") here over char+ allot place align ; immediate restrict
72:
73: : C" ( compilation "...<quote>" -- ; run-time -- c-addr ) \ core-ext c-quote
74: [char] " parse postpone CLiteral ; immediate restrict
1.1 anton 75:
76: \ UNUSED 17may93jaw
77:
1.11 anton 78: : unused ( -- u ) \ core-ext
79: s0 @ 512 - \ for stack
80: here - ;
1.1 anton 81:
82: \ [COMPILE] 17may93jaw
83:
1.11 anton 84: : [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile
85: ' compile, ; immediate
1.1 anton 86:
87: \ MARKER 17may93jaw
88:
89: \ : marker here last @ create , , DOES> dup @ last ! cell+ @ dp ! ;
90: \ doesn't work now. vocabularies?
91:
92: \ CONVERT 17may93jaw
93:
1.11 anton 94: : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext
95: \ obsolescent; supersedet by @code{>number}.
96: true >number drop ;
1.1 anton 97:
98: \ ERASE 17may93jaw
99:
1.11 anton 100: : erase ( addr len -- ) \ core-ext
101: \ !! dependence on "1 chars 1 ="
102: ( 0 1 chars um/mod nip ) 0 fill ;
103: : blank ( addr len -- ) \ string
104: bl fill ;
1.1 anton 105:
1.7 pazsan 106: \ SEARCH 02sep94py
107:
1.11 anton 108: : search ( buf buflen text textlen -- restbuf restlen flag ) \ string
109: 2over 2 pick - 1+ 3 pick c@ >r
110: BEGIN
111: r@ scan dup
112: WHILE
113: >r >r 2dup r@ -text
114: 0=
115: IF
116: >r drop 2drop r> r> r> rot + 1- rdrop true
117: EXIT
118: THEN
119: r> r> 1 /string
120: REPEAT
121: 2drop 2drop rdrop false ;
1.7 pazsan 122:
1.1 anton 123: \ ROLL 17may93jaw
124:
1.11 anton 125: : roll ( x0 x1 .. xn n -- x1 .. xn x0 ) \ core-ext
1.10 pazsan 126: dup 1+ pick >r
127: cells sp@ cell+ dup cell+ rot move drop r> ;
1.1 anton 128:
129: \ SOURCE-ID SAVE-INPUT RESTORE-INPUT 11jun93jaw
130:
1.11 anton 131: : source-id ( -- 0 | -1 | fileid ) \ core-ext source-i-d
1.13 anton 132: loadfile @ dup 0= IF drop sourceline# 0 min THEN ;
1.1 anton 133:
1.11 anton 134: : save-input ( -- x1 .. xn n ) \ core-ext
1.14 ! anton 135: >in @
! 136: loadfile @
! 137: if
! 138: loadfile @ file-position throw
! 139: else
! 140: blk @
! 141: linestart @
! 142: then
! 143: sourceline#
! 144: >tib @
! 145: source-id
! 146: 6 ;
1.1 anton 147:
1.11 anton 148: : restore-input ( x1 .. xn n -- flag ) \ core-ext
1.14 ! anton 149: 6 <> -12 and throw
! 150: source-id <> -12 and throw
! 151: >tib !
! 152: >r ( line# )
! 153: loadfile @ 0<>
! 154: if
! 155: loadfile @ reposition-file throw
! 156: else
! 157: linestart !
! 158: blk !
! 159: sourceline# r@ <> blk @ 0= and loadfile @ 0= and
! 160: if
! 161: drop rdrop true EXIT
! 162: then
! 163: then
! 164: r> loadline !
! 165: >in !
! 166: false ;
! 167:
! 168: \ : save-input ( -- x1 .. xn n ) \ core-ext
! 169: \ >in @
! 170: \ loadfile @ ?dup
! 171: \ IF dup file-position throw sourceline# >tib @ 6
! 172: \ #tib @ >tib +!
! 173: \ ELSE sourceline# blk @ linestart @ >tib @ 5 THEN
! 174: \ ;
! 175:
! 176: \ : restore-input ( x1 .. xn n -- flag ) \ core-ext
! 177: \ swap >tib !
! 178: \ 6 = IF loadline ! rot dup loadfile !
! 179: \ reposition-file IF drop true EXIT THEN
! 180: \ ELSE linestart ! blk !
! 181: \ dup sourceline# <> IF 2drop true EXIT THEN
! 182: \ loadline !
! 183: \ THEN
! 184: \ >in ! false ;
1.1 anton 185:
186:
187:
188: \ This things we don't need, but for being complete... jaw
189:
190: \ EXPECT SPAN 17may93jaw
191:
1.11 anton 192: variable span ( -- a-addr ) \ core-ext
193: \ obsolescent
1.1 anton 194:
1.11 anton 195: : expect ( c-addr +len -- ) \ core-ext
196: \ obsolescent; use accept
1.9 anton 197: 0 rot over
198: BEGIN ( maxlen span c-addr pos1 )
199: key decode ( maxlen span c-addr pos2 flag )
200: >r 2over = r> or
201: UNTIL
202: type-rest drop
203: 2drop nip span ! ;
1.1 anton 204:
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