Annotation of gforth/extend.fs, revision 1.16
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:
1.16 ! anton 40: ' drop alias d>s ( d -- n ) \ double d_to_s
! 41:
1.15 anton 42: : dabs ( d1 -- d2 ) \ double
43: dup 0< IF dnegate THEN ;
44:
1.11 anton 45: : m*/ ( d1 n2 u3 -- dqout ) \ double m-star-slash
46: >r s>d >r abs -rot
47: s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um*
48: swap >r 0 d+ r> -rot r@ um/mod -rot r> um/mod nip swap
49: r> IF dnegate THEN ;
1.4 pazsan 50:
1.1 anton 51: \ CASE OF ENDOF ENDCASE 17may93jaw
52:
53: \ just as described in dpANS5
54:
1.11 anton 55: 0 CONSTANT case ( compilation -- case-sys ; run-time -- ) \ core-ext
56: immediate
1.1 anton 57:
1.11 anton 58: : of ( compilation -- of-sys ; run-time x1 x2 -- |x1 ) \ core-ext
59: \ !! the implementation does not match the stack effect
60: 1+ >r
61: postpone over postpone = postpone if postpone drop
62: r> ; immediate
63:
64: : endof ( compilation case-sys1 of-sys -- case-sys2 ; run-time -- ) \ core-ext end-of
65: >r postpone else r> ; immediate
66:
67: : endcase ( compilation case-sys -- ; run-time x -- ) \ core-ext end-case
68: postpone drop
69: 0 ?do postpone then loop ; immediate
1.1 anton 70:
71: \ C" 17may93jaw
72:
73: : (c") "lit ;
74:
1.11 anton 75: : CLiteral
76: postpone (c") here over char+ allot place align ; immediate restrict
77:
78: : C" ( compilation "...<quote>" -- ; run-time -- c-addr ) \ core-ext c-quote
79: [char] " parse postpone CLiteral ; immediate restrict
1.1 anton 80:
81: \ UNUSED 17may93jaw
82:
1.11 anton 83: : unused ( -- u ) \ core-ext
84: s0 @ 512 - \ for stack
85: here - ;
1.1 anton 86:
87: \ [COMPILE] 17may93jaw
88:
1.11 anton 89: : [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile
90: ' compile, ; immediate
1.1 anton 91:
92: \ MARKER 17may93jaw
93:
94: \ : marker here last @ create , , DOES> dup @ last ! cell+ @ dp ! ;
95: \ doesn't work now. vocabularies?
96:
97: \ CONVERT 17may93jaw
98:
1.11 anton 99: : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext
100: \ obsolescent; supersedet by @code{>number}.
101: true >number drop ;
1.1 anton 102:
103: \ ERASE 17may93jaw
104:
1.11 anton 105: : erase ( addr len -- ) \ core-ext
106: \ !! dependence on "1 chars 1 ="
107: ( 0 1 chars um/mod nip ) 0 fill ;
108: : blank ( addr len -- ) \ string
109: bl fill ;
1.1 anton 110:
1.7 pazsan 111: \ SEARCH 02sep94py
112:
1.11 anton 113: : search ( buf buflen text textlen -- restbuf restlen flag ) \ string
114: 2over 2 pick - 1+ 3 pick c@ >r
115: BEGIN
116: r@ scan dup
117: WHILE
118: >r >r 2dup r@ -text
119: 0=
120: IF
121: >r drop 2drop r> r> r> rot + 1- rdrop true
122: EXIT
123: THEN
124: r> r> 1 /string
125: REPEAT
126: 2drop 2drop rdrop false ;
1.7 pazsan 127:
1.1 anton 128: \ ROLL 17may93jaw
129:
1.11 anton 130: : roll ( x0 x1 .. xn n -- x1 .. xn x0 ) \ core-ext
1.10 pazsan 131: dup 1+ pick >r
132: cells sp@ cell+ dup cell+ rot move drop r> ;
1.1 anton 133:
134: \ SOURCE-ID SAVE-INPUT RESTORE-INPUT 11jun93jaw
135:
1.11 anton 136: : source-id ( -- 0 | -1 | fileid ) \ core-ext source-i-d
1.13 anton 137: loadfile @ dup 0= IF drop sourceline# 0 min THEN ;
1.1 anton 138:
1.11 anton 139: : save-input ( -- x1 .. xn n ) \ core-ext
1.14 anton 140: >in @
141: loadfile @
142: if
143: loadfile @ file-position throw
144: else
145: blk @
146: linestart @
147: then
148: sourceline#
149: >tib @
150: source-id
151: 6 ;
1.1 anton 152:
1.11 anton 153: : restore-input ( x1 .. xn n -- flag ) \ core-ext
1.14 anton 154: 6 <> -12 and throw
155: source-id <> -12 and throw
156: >tib !
157: >r ( line# )
158: loadfile @ 0<>
159: if
160: loadfile @ reposition-file throw
161: else
162: linestart !
163: blk !
164: sourceline# r@ <> blk @ 0= and loadfile @ 0= and
165: if
166: drop rdrop true EXIT
167: then
168: then
169: r> loadline !
170: >in !
171: false ;
172:
173: \ : save-input ( -- x1 .. xn n ) \ core-ext
174: \ >in @
175: \ loadfile @ ?dup
176: \ IF dup file-position throw sourceline# >tib @ 6
177: \ #tib @ >tib +!
178: \ ELSE sourceline# blk @ linestart @ >tib @ 5 THEN
179: \ ;
180:
181: \ : restore-input ( x1 .. xn n -- flag ) \ core-ext
182: \ swap >tib !
183: \ 6 = IF loadline ! rot dup loadfile !
184: \ reposition-file IF drop true EXIT THEN
185: \ ELSE linestart ! blk !
186: \ dup sourceline# <> IF 2drop true EXIT THEN
187: \ loadline !
188: \ THEN
189: \ >in ! false ;
1.1 anton 190:
191:
192:
193: \ This things we don't need, but for being complete... jaw
194:
195: \ EXPECT SPAN 17may93jaw
196:
1.11 anton 197: variable span ( -- a-addr ) \ core-ext
198: \ obsolescent
1.1 anton 199:
1.11 anton 200: : expect ( c-addr +len -- ) \ core-ext
201: \ obsolescent; use accept
1.9 anton 202: 0 rot over
203: BEGIN ( maxlen span c-addr pos1 )
204: key decode ( maxlen span c-addr pos2 flag )
205: >r 2over = r> or
206: UNTIL
207: type-rest drop
208: 2drop nip span ! ;
1.1 anton 209:
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