Annotation of gforth/extend.fs, revision 1.19
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:
1.18 anton 33: : value ( w "name" -- ) \ 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:
1.11 anton 42: : m*/ ( d1 n2 u3 -- dqout ) \ double m-star-slash
43: >r s>d >r abs -rot
44: s>d r> xor r> swap >r >r dabs rot tuck um* 2swap um*
45: swap >r 0 d+ r> -rot r@ um/mod -rot r> um/mod nip swap
46: r> IF dnegate THEN ;
1.4 pazsan 47:
1.1 anton 48: \ CASE OF ENDOF ENDCASE 17may93jaw
49:
50: \ just as described in dpANS5
51:
1.11 anton 52: 0 CONSTANT case ( compilation -- case-sys ; run-time -- ) \ core-ext
53: immediate
1.1 anton 54:
1.11 anton 55: : of ( compilation -- of-sys ; run-time x1 x2 -- |x1 ) \ core-ext
56: \ !! the implementation does not match the stack effect
57: 1+ >r
58: postpone over postpone = postpone if postpone drop
59: r> ; immediate
60:
61: : endof ( compilation case-sys1 of-sys -- case-sys2 ; run-time -- ) \ core-ext end-of
62: >r postpone else r> ; immediate
63:
64: : endcase ( compilation case-sys -- ; run-time x -- ) \ core-ext end-case
65: postpone drop
66: 0 ?do postpone then loop ; immediate
1.1 anton 67:
68: \ C" 17may93jaw
69:
70: : (c") "lit ;
71:
1.11 anton 72: : CLiteral
73: postpone (c") here over char+ allot place align ; immediate restrict
74:
75: : C" ( compilation "...<quote>" -- ; run-time -- c-addr ) \ core-ext c-quote
76: [char] " parse postpone CLiteral ; immediate restrict
1.1 anton 77:
78: \ UNUSED 17may93jaw
79:
1.11 anton 80: : unused ( -- u ) \ core-ext
1.19 ! anton 81: forthstart dup 3 cells + @ + here - ;
1.1 anton 82:
83: \ [COMPILE] 17may93jaw
84:
1.11 anton 85: : [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile
86: ' compile, ; immediate
1.1 anton 87:
88: \ MARKER 17may93jaw
89:
90: \ : marker here last @ create , , DOES> dup @ last ! cell+ @ dp ! ;
91: \ doesn't work now. vocabularies?
92:
93: \ CONVERT 17may93jaw
94:
1.11 anton 95: : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext
1.19 ! anton 96: \ obsolescent; superseded by @code{>number}.
1.11 anton 97: true >number drop ;
1.1 anton 98:
99: \ ERASE 17may93jaw
100:
1.11 anton 101: : erase ( addr len -- ) \ core-ext
102: \ !! dependence on "1 chars 1 ="
103: ( 0 1 chars um/mod nip ) 0 fill ;
104: : blank ( addr len -- ) \ string
105: bl fill ;
1.1 anton 106:
1.7 pazsan 107: \ SEARCH 02sep94py
108:
1.11 anton 109: : search ( buf buflen text textlen -- restbuf restlen flag ) \ string
110: 2over 2 pick - 1+ 3 pick c@ >r
111: BEGIN
112: r@ scan dup
113: WHILE
114: >r >r 2dup r@ -text
115: 0=
116: IF
117: >r drop 2drop r> r> r> rot + 1- rdrop true
118: EXIT
119: THEN
120: r> r> 1 /string
121: REPEAT
122: 2drop 2drop rdrop false ;
1.7 pazsan 123:
1.1 anton 124: \ SOURCE-ID SAVE-INPUT RESTORE-INPUT 11jun93jaw
125:
1.11 anton 126: : source-id ( -- 0 | -1 | fileid ) \ core-ext source-i-d
1.13 anton 127: loadfile @ dup 0= IF drop sourceline# 0 min THEN ;
1.1 anton 128:
1.11 anton 129: : save-input ( -- x1 .. xn n ) \ core-ext
1.14 anton 130: >in @
131: loadfile @
132: if
133: loadfile @ file-position throw
134: else
135: blk @
136: linestart @
137: then
138: sourceline#
139: >tib @
140: source-id
141: 6 ;
1.1 anton 142:
1.11 anton 143: : restore-input ( x1 .. xn n -- flag ) \ core-ext
1.14 anton 144: 6 <> -12 and throw
145: source-id <> -12 and throw
146: >tib !
147: >r ( line# )
148: loadfile @ 0<>
149: if
150: loadfile @ reposition-file throw
151: else
152: linestart !
153: blk !
154: sourceline# r@ <> blk @ 0= and loadfile @ 0= and
155: if
156: drop rdrop true EXIT
157: then
158: then
159: r> loadline !
160: >in !
161: false ;
162:
163: \ : save-input ( -- x1 .. xn n ) \ core-ext
164: \ >in @
165: \ loadfile @ ?dup
166: \ IF dup file-position throw sourceline# >tib @ 6
167: \ #tib @ >tib +!
168: \ ELSE sourceline# blk @ linestart @ >tib @ 5 THEN
169: \ ;
170:
171: \ : restore-input ( x1 .. xn n -- flag ) \ core-ext
172: \ swap >tib !
173: \ 6 = IF loadline ! rot dup loadfile !
174: \ reposition-file IF drop true EXIT THEN
175: \ ELSE linestart ! blk !
176: \ dup sourceline# <> IF 2drop true EXIT THEN
177: \ loadline !
178: \ THEN
179: \ >in ! false ;
1.1 anton 180:
181:
182:
183: \ This things we don't need, but for being complete... jaw
184:
185: \ EXPECT SPAN 17may93jaw
186:
1.11 anton 187: variable span ( -- a-addr ) \ core-ext
188: \ obsolescent
1.1 anton 189:
1.11 anton 190: : expect ( c-addr +len -- ) \ core-ext
191: \ obsolescent; use accept
1.9 anton 192: 0 rot over
193: BEGIN ( maxlen span c-addr pos1 )
194: key decode ( maxlen span c-addr pos2 flag )
195: >r 2over = r> or
196: UNTIL
1.17 pazsan 197: 2 pick swap /string type
198: nip span ! ;
1.1 anton 199:
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