Annotation of gforth/extend.fs, revision 1.28
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:
1.3 anton 33: \ !! 2value
1.1 anton 34:
1.11 anton 35: : 2Literal ( compilation w1 w2 -- ; run-time -- w1 w2 ) \ double two-literal
36: swap postpone Literal postpone Literal ; immediate restrict
1.2 pazsan 37:
1.16 anton 38: ' drop alias d>s ( d -- n ) \ double d_to_s
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: \ [COMPILE] 17may93jaw
77:
1.11 anton 78: : [compile] ( compilation "name" -- ; run-time ? -- ? ) \ core-ext bracket-compile
1.24 pazsan 79: comp' drop compile, ; immediate
1.1 anton 80:
81: \ CONVERT 17may93jaw
82:
1.11 anton 83: : convert ( ud1 c-addr1 -- ud2 c-addr2 ) \ core-ext
1.26 anton 84: \G obsolescent; superseded by @code{>number}.
85: char+ true >number drop ;
1.1 anton 86:
87: \ ERASE 17may93jaw
88:
1.11 anton 89: : erase ( addr len -- ) \ core-ext
90: \ !! dependence on "1 chars 1 ="
91: ( 0 1 chars um/mod nip ) 0 fill ;
92: : blank ( addr len -- ) \ string
93: bl fill ;
1.1 anton 94:
1.7 pazsan 95: \ SEARCH 02sep94py
96:
1.28 ! anton 97: : search ( c-addr1 u1 c-addr2 u2 -- c-addr3 u3 flag ) \ string
! 98: \ not very efficient; but if we want efficiency, we'll do it as primitive
! 99: 2>r 2dup
! 100: begin
! 101: dup r@ >=
! 102: while
! 103: over 2r@ swap -text 0= if
! 104: 2swap 2drop 2r> 2drop true exit
! 105: endif
! 106: 1 /string
! 107: repeat
! 108: 2drop 2r> 2drop false ;
1.7 pazsan 109:
1.1 anton 110: \ SOURCE-ID SAVE-INPUT RESTORE-INPUT 11jun93jaw
111:
1.22 anton 112: : source-id ( -- 0 | -1 | fileid ) \ core-ext,file source-i-d
1.13 anton 113: loadfile @ dup 0= IF drop sourceline# 0 min THEN ;
1.1 anton 114:
1.11 anton 115: : save-input ( -- x1 .. xn n ) \ core-ext
1.14 anton 116: >in @
117: loadfile @
118: if
119: loadfile @ file-position throw
120: else
121: blk @
122: linestart @
123: then
124: sourceline#
125: >tib @
126: source-id
127: 6 ;
1.1 anton 128:
1.11 anton 129: : restore-input ( x1 .. xn n -- flag ) \ core-ext
1.14 anton 130: 6 <> -12 and throw
131: source-id <> -12 and throw
132: >tib !
133: >r ( line# )
134: loadfile @ 0<>
135: if
136: loadfile @ reposition-file throw
137: else
138: linestart !
139: blk !
140: sourceline# r@ <> blk @ 0= and loadfile @ 0= and
141: if
142: drop rdrop true EXIT
143: then
144: then
145: r> loadline !
146: >in !
147: false ;
148:
1.1 anton 149: \ This things we don't need, but for being complete... jaw
150:
151: \ EXPECT SPAN 17may93jaw
152:
1.11 anton 153: variable span ( -- a-addr ) \ core-ext
154: \ obsolescent
1.1 anton 155:
1.11 anton 156: : expect ( c-addr +len -- ) \ core-ext
157: \ obsolescent; use accept
1.9 anton 158: 0 rot over
159: BEGIN ( maxlen span c-addr pos1 )
160: key decode ( maxlen span c-addr pos2 flag )
161: >r 2over = r> or
162: UNTIL
1.17 pazsan 163: 2 pick swap /string type
164: nip span ! ;
1.27 jwilke 165:
166: \ marker 18dec94py
167:
168: \ Marker creates a mark that is removed (including everything
169: \ defined afterwards) when executing the mark.
170:
171: : marker, ( -- mark ) here dup A,
172: voclink @ A, voclink
173: BEGIN @ dup WHILE dup 0 wordlist-link - @ A, REPEAT drop
174: udp @ , ;
175:
176: : marker! ( mark -- )
177: dup @ swap cell+
178: dup @ voclink ! cell+
179: voclink
180: BEGIN
181: @ dup
182: WHILE
183: over @ over 0 wordlist-link - !
184: swap cell+ swap
185: REPEAT
186: drop voclink
187: BEGIN
188: @ dup
189: WHILE
190: dup 0 wordlist-link - rehash
191: REPEAT
192: drop
193: @ udp ! dp ! ;
194:
195: : marker ( "mark" -- )
196: marker, Create A,
197: DOES> ( -- )
198: @ marker! ;
1.1 anton 199:
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