[gforth] / gforth / history.fs  

gforth: gforth/history.fs

1 : pazsan 1.4 \ History file support 16oct94py
2 :    
3 : anton 1.8 \ 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 : pazsan 1.4 0 Value history
22 :    
23 :     2Variable forward^
24 :     2Variable backward^
25 :     2Variable end^
26 :    
27 : pazsan 1.7 : force-open ( addr len -- handle )
28 :     2dup r/w open-file 0<
29 :     IF drop r/w create-file throw ELSE nip nip THEN ;
30 :    
31 : pazsan 1.4 : get-history ( addr len -- wid )
32 : pazsan 1.7 force-open to history
33 : pazsan 1.4 history file-size throw
34 :     2dup forward^ 2! 2dup backward^ 2! end^ 2! ;
35 :    
36 : anton 1.6 s" ~/.gforth-history" get-history
37 : pazsan 1.4
38 : anton 1.6 : history-cold
39 :     Defers 'cold
40 :     s" ~/.gforth-history" get-history ;
41 : pazsan 1.4
42 :     ' history-cold IS 'cold
43 :    
44 :     \ moving in history file 16oct94py
45 :    
46 :     : clear-line ( max span addr pos1 -- max addr )
47 :     backspaces over spaces swap backspaces ;
48 :    
49 :     : clear-tib ( max span addr pos -- max 0 addr 0 false )
50 :     clear-line 0 tuck dup ;
51 :    
52 : pazsan 1.7 : hist-pos ( -- ud ) history file-position throw ;
53 :     : hist-setpos ( ud -- ) history reposition-file throw ;
54 : pazsan 1.4
55 : pazsan 1.7 : get-line ( addr len -- len' flag )
56 :     swap history read-line throw ;
57 :    
58 : pazsan 1.4 : next-line ( max span addr pos1 -- max span addr pos2 false )
59 :     clear-line
60 : pazsan 1.7 forward^ 2@ 2dup hist-setpos backward^ 2!
61 :     2dup get-line drop
62 :     hist-pos forward^ 2!
63 :     tuck 2dup type 0 ;
64 : pazsan 1.4
65 :     : prev-line ( max span addr pos1 -- max span addr pos2 false )
66 : pazsan 1.7 clear-line backward^ 2@ forward^ 2!
67 :     over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
68 :     BEGIN
69 :     backward^ 2! 2dup get-line WHILE
70 :     hist-pos 2dup forward^ 2@ d< WHILE
71 :     rot drop
72 :     REPEAT 2drop THEN
73 :     tuck 2dup type 0 ;
74 : pazsan 1.4
75 :     : ctrl ( "<char>" -- ctrl-code )
76 :     char [char] @ - postpone Literal ; immediate
77 :    
78 :     Create lfpad #lf c,
79 :    
80 :     : (enter) ( max span addr pos1 -- max span addr pos2 true )
81 : pazsan 1.7 >r end^ 2@ hist-setpos
82 :     2dup swap history write-line throw
83 :     hist-pos 2dup backward^ 2! end^ 2!
84 : pazsan 1.4 r> (ret) ;
85 :    
86 :     \ some other key commands 16oct94py
87 :    
88 :     : first-pos ( max span addr pos1 -- max span addr 0 0 )
89 :     backspaces 0 0 ;
90 :     : end-pos ( max span addr pos1 -- max span addr span 0 )
91 :     type-rest 2drop over 0 ;
92 :    
93 :     : extract-word ( addr len -- addr' len' ) dup >r
94 :     BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
95 :     tuck + r> rot - ;
96 :    
97 :     Create prefix-found 0 , 0 ,
98 :    
99 :     : word-lex ( nfa1 nfa2 -- -1/0/1 )
100 :     dup 0= IF 2drop 1 EXIT THEN
101 :     cell+ >r cell+ count $1F and
102 :     dup r@ c@ $1F and =
103 :     IF r> char+ capscomp 0<= EXIT THEN
104 :     nip r> c@ $1F and < ;
105 :    
106 : pazsan 1.7 : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 ) >r
107 :     BEGIN dup WHILE >r dup r@ cell+ c@ $1F and <=
108 :     IF 2dup r@ cell+ char+ capscomp 0=
109 :     IF r> dup r@ word-lex
110 :     IF dup prefix-found @ word-lex
111 :     0>= IF rdrop dup >r THEN
112 :     THEN >r
113 :     THEN
114 :     THEN r> @
115 :     REPEAT drop r> ;
116 :    
117 :     : prefix-string ( addr len nfa -- addr' len' )
118 :     dup prefix-found ! ?dup
119 :     IF cell+ count $1F and rot /string rot drop
120 :     dup 1+ prefix-found cell+ !
121 :     ELSE
122 :     2drop s" " prefix-found cell+ off
123 :     THEN ;
124 :    
125 :     : search-prefix ( addr1 len1 -- addr2 len2 )
126 :     0 vp dup @ 1- cells over +
127 :     DO I 2@ <>
128 :     IF I cell+ @ @ swap search-voc THEN
129 :     [ -1 cells ] Literal +LOOP
130 :     prefix-string ;
131 :    
132 :     : kill-expand ( max span addr pos1 -- max span addr pos2 )
133 :     prefix-found cell+ @ 0 ?DO (del) LOOP ;
134 :    
135 :     : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag )
136 :     5 pick over 4 pick + prefix-found @ 0<> - < ;
137 : pazsan 1.4
138 :     : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
139 : pazsan 1.7 kill-expand 2dup extract-word search-prefix
140 :     tib-full?
141 :     IF 7 emit 2drop 0 0 prefix-found 2!
142 :     ELSE bounds ?DO I c@ (ins) LOOP THEN
143 :     prefix-found @ IF bl (ins) THEN 0 ;
144 : pazsan 1.4
145 :     : kill-prefix ( key -- key )
146 :     dup #tab <> IF 0 0 prefix-found 2! THEN ;
147 :    
148 :     ' kill-prefix IS everychar
149 :    
150 :     ' next-line ctrl N cells ctrlkeys + !
151 :     ' prev-line ctrl P cells ctrlkeys + !
152 :     ' clear-tib ctrl K cells ctrlkeys + !
153 :     ' first-pos ctrl A cells ctrlkeys + !
154 :     ' end-pos ctrl E cells ctrlkeys + !
155 :     ' (enter) #lf cells ctrlkeys + !
156 :     ' (enter) #cr cells ctrlkeys + !
157 :     ' tab-expand #tab cells ctrlkeys + !
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