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history.fs
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1.12:
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Wed Aug 21 14:58:41 1996 UTC (27 years, 8 months ago) by
anton
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MAIN
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HEAD
a little cleanup in 386.h
renamed special: to interpret/compile:
renamed save-string to save-mem
added extend-mem
replaced (name>) with ((name>))
replaced name> with name>int and name>comp
renamed compile-only to compile-only-error
replaced xt>i with name>int
replaced xt>c with name>comp
removed xt>s
removed found
search-wordlist now delivers interpretation-xt
replaced (sfind) with find-name
replaced C' with COMP' and [C'] with [COMP']
removed S' and [S']
added hex.
added some helper words
adapted other words to the changes
started documenting the intergration of Gforth in applications
1: \ command line edit and history support 16oct94py
2:
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: :noname
22: char [char] @ - ;
23: :noname
24: char [char] @ - postpone Literal ;
25: interpret/compile: ctrl ( "<char>" -- ctrl-code )
26:
27: \ command line editing 16oct94py
28:
29: : >string ( span addr pos1 -- span addr pos1 addr2 len )
30: over 3 pick 2 pick chars /string ;
31: : type-rest ( span addr pos1 -- span addr pos1 back )
32: >string tuck type ;
33: : (del) ( max span addr pos1 -- max span addr pos2 )
34: 1- >string over 1+ -rot move
35: rot 1- -rot #bs emit type-rest bl emit 1+ backspaces ;
36: : (ins) ( max span addr pos1 char -- max span addr pos2 )
37: >r >string over 1+ swap move 2dup chars + r> swap c!
38: rot 1+ -rot type-rest 1- backspaces 1+ ;
39: : ?del ( max span addr pos1 -- max span addr pos2 0 )
40: dup IF (del) THEN 0 ;
41: : (ret) type-rest drop true space ;
42: : back dup IF 1- #bs emit ELSE #bell emit THEN 0 ;
43: : forw 2 pick over <> IF 2dup + c@ emit 1+ ELSE #bell emit THEN 0 ;
44: : eof 2 pick over or 0= IF
45: bye
46: ELSE 2 pick over <>
47: IF forw drop (del) ELSE #bell emit THEN 0
48: THEN ;
49:
50: ' forw ctrl F cells ctrlkeys + !
51: ' back ctrl B cells ctrlkeys + !
52: ' ?del ctrl H cells ctrlkeys + !
53: ' eof ctrl D cells ctrlkeys + !
54:
55: ' (ins) IS insert-char
56:
57: \ history support 16oct94py
58:
59: 0 Value history
60:
61: 2Variable forward^
62: 2Variable backward^
63: 2Variable end^
64:
65: : force-open ( addr len -- handle )
66: 2dup r/w open-file 0<
67: IF drop r/w create-file throw ELSE nip nip THEN ;
68:
69: : get-history ( addr len -- wid )
70: force-open to history
71: history file-size throw
72: 2dup forward^ 2! 2dup backward^ 2! end^ 2! ;
73:
74: s" ~/.gforth-history" get-history
75:
76: : history-cold
77: Defers 'cold
78: s" ~/.gforth-history" get-history ;
79:
80: ' history-cold IS 'cold
81:
82: \ moving in history file 16oct94py
83:
84: : clear-line ( max span addr pos1 -- max addr )
85: backspaces over spaces swap backspaces ;
86:
87: : clear-tib ( max span addr pos -- max 0 addr 0 false )
88: clear-line 0 tuck dup ;
89:
90: : hist-pos ( -- ud ) history file-position throw ;
91: : hist-setpos ( ud -- ) history reposition-file throw ;
92:
93: : get-line ( addr len -- len' flag )
94: swap history read-line throw ;
95:
96: : next-line ( max span addr pos1 -- max span addr pos2 false )
97: clear-line
98: forward^ 2@ 2dup hist-setpos backward^ 2!
99: 2dup get-line drop
100: hist-pos forward^ 2!
101: tuck 2dup type 0 ;
102:
103: : prev-line ( max span addr pos1 -- max span addr pos2 false )
104: clear-line backward^ 2@ forward^ 2!
105: over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
106: BEGIN
107: backward^ 2! 2dup get-line WHILE
108: hist-pos 2dup forward^ 2@ d< WHILE
109: rot drop
110: REPEAT 2drop THEN
111: tuck 2dup type 0 ;
112:
113: Create lfpad #lf c,
114:
115: : (enter) ( max span addr pos1 -- max span addr pos2 true )
116: >r end^ 2@ hist-setpos
117: 2dup swap history write-line throw
118: hist-pos 2dup backward^ 2! end^ 2!
119: r> (ret) ;
120:
121: \ some other key commands 16oct94py
122:
123: : first-pos ( max span addr pos1 -- max span addr 0 0 )
124: backspaces 0 0 ;
125: : end-pos ( max span addr pos1 -- max span addr span 0 )
126: type-rest 2drop over 0 ;
127:
128: : extract-word ( addr len -- addr' len' ) dup >r
129: BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
130: tuck + r> rot - ;
131:
132: Create prefix-found 0 , 0 ,
133:
134: : word-lex ( nfa1 nfa2 -- -1/0/1 )
135: dup 0=
136: IF
137: 2drop 1 EXIT
138: THEN
139: name>string 2>r name>string
140: dup r@ =
141: IF
142: rdrop r> capscomp 0<= EXIT
143: THEN
144: r> <
145: nip rdrop ;
146:
147: : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
148: >r
149: BEGIN
150: dup
151: WHILE
152: >r dup r@ name>string nip <=
153: IF
154: 2dup r@ name>string drop capscomp 0=
155: IF
156: r> dup r@ word-lex
157: IF
158: dup prefix-found @ word-lex
159: 0>=
160: IF
161: rdrop dup >r
162: THEN
163: THEN
164: >r
165: THEN
166: THEN
167: r> @
168: REPEAT
169: drop r> ;
170:
171: : prefix-string ( addr len nfa -- addr' len' )
172: dup prefix-found ! ?dup
173: IF
174: name>string rot /string rot drop
175: dup 1+ prefix-found cell+ !
176: ELSE
177: 2drop s" " prefix-found cell+ off
178: THEN ;
179:
180: : search-prefix ( addr1 len1 -- addr2 len2 )
181: 0 vp dup @ 1- cells over +
182: DO I 2@ <>
183: IF I cell+ @ @ swap search-voc THEN
184: [ -1 cells ] Literal +LOOP
185: prefix-string ;
186:
187: : kill-expand ( max span addr pos1 -- max span addr pos2 )
188: prefix-found cell+ @ 0 ?DO (del) LOOP ;
189:
190: : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
191: 5 pick over 4 pick + prefix-found @ 0<> - < ;
192:
193: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
194: kill-expand 2dup extract-word search-prefix
195: tib-full?
196: IF 7 emit 2drop 0 0 prefix-found 2!
197: ELSE bounds ?DO I c@ (ins) LOOP THEN
198: prefix-found @ IF bl (ins) THEN 0 ;
199:
200: : kill-prefix ( key -- key )
201: dup #tab <> IF 0 0 prefix-found 2! THEN ;
202:
203: ' kill-prefix IS everychar
204:
205: ' next-line ctrl N cells ctrlkeys + !
206: ' prev-line ctrl P cells ctrlkeys + !
207: ' clear-tib ctrl K cells ctrlkeys + !
208: ' first-pos ctrl A cells ctrlkeys + !
209: ' end-pos ctrl E cells ctrlkeys + !
210: ' (enter) #lf cells ctrlkeys + !
211: ' (enter) #cr cells ctrlkeys + !
212: ' tab-expand #tab cells ctrlkeys + !
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