Annotation of gforth/history.fs, revision 1.6
1.4 pazsan 1: \ History file support 16oct94py
2:
3: 0 Value history
4:
5: 2Variable forward^
6: 2Variable backward^
7: 2Variable end^
8:
9: : get-history ( addr len -- wid )
1.6 ! anton 10: \ check-file-prefix drop
1.4 pazsan 11: 2dup r/w open-file 0<
12: IF drop r/w create-file throw ELSE nip nip THEN
13: to history
14: history file-size throw
15: 2dup forward^ 2! 2dup backward^ 2! end^ 2! ;
16:
1.6 ! anton 17: s" ~/.gforth-history" get-history
1.4 pazsan 18:
1.6 ! anton 19: : history-cold
! 20: Defers 'cold
! 21: s" ~/.gforth-history" get-history ;
1.4 pazsan 22:
23: ' history-cold IS 'cold
24:
25: \ moving in history file 16oct94py
26:
27: : clear-line ( max span addr pos1 -- max addr )
28: backspaces over spaces swap backspaces ;
29:
30: : clear-tib ( max span addr pos -- max 0 addr 0 false )
31: clear-line 0 tuck dup ;
32:
33: : get-line ( max addr -- max span addr pos dpos )
34: history file-position throw backward^ 2!
35: 2dup swap history read-line throw drop
36: 2dup type tuck
37: history file-position throw forward^ 2! ;
38:
39: : next-line ( max span addr pos1 -- max span addr pos2 false )
40: clear-line
41: forward^ 2@ history reposition-file throw
42: get-line 0 ;
43:
44: : prev-line ( max span addr pos1 -- max span addr pos2 false )
45: clear-line over 2 + negate s>d backward^ 2@ d+ 0. dmax
46: 2dup history reposition-file throw
47: BEGIN 2over swap history read-line throw WHILE
48: >r history file-position throw
49: 2dup backward^ 2@ d< WHILE 2swap 2drop rdrop
50: REPEAT ELSE >r history file-position throw THEN
51: forward^ 2! backward^ 2! r> tuck 2dup type 0 ;
52:
53: : ctrl ( "<char>" -- ctrl-code )
54: char [char] @ - postpone Literal ; immediate
55:
56: Create lfpad #lf c,
57:
58: : (enter) ( max span addr pos1 -- max span addr pos2 true )
59: >r end^ 2@ history reposition-file throw
60: 2dup swap history write-file throw
61: lfpad 1 history write-file throw
62: history file-position throw 2dup backward^ 2! end^ 2!
63: r> (ret) ;
64:
65: \ some other key commands 16oct94py
66:
67: : first-pos ( max span addr pos1 -- max span addr 0 0 )
68: backspaces 0 0 ;
69: : end-pos ( max span addr pos1 -- max span addr span 0 )
70: type-rest 2drop over 0 ;
71:
72: : extract-word ( addr len -- addr' len' ) dup >r
73: BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+
74: tuck + r> rot - ;
75:
76: Create prefix-found 0 , 0 ,
77:
78: : word-lex ( nfa1 nfa2 -- -1/0/1 )
79: dup 0= IF 2drop 1 EXIT THEN
80: cell+ >r cell+ count $1F and
81: dup r@ c@ $1F and =
82: IF r> char+ capscomp 0<= EXIT THEN
83: nip r> c@ $1F and < ;
84:
85: : search-prefix ( addr len1 -- suffix len2 ) 0 >r context
86: BEGIN BEGIN dup @ over cell - @ = WHILE cell - REPEAT
87: dup >r -rot r> @ @
88: BEGIN dup WHILE >r dup r@ cell+ c@ $1F and <=
89: IF 2dup r@ cell+ char+ capscomp 0=
90: IF r> dup r@ word-lex
91: IF dup prefix-found @ word-lex
92: 0>= IF rdrop dup >r THEN
93: THEN >r
94: THEN
95: THEN r> @
96: REPEAT drop rot cell - dup vp u> 0=
97: UNTIL drop r> dup prefix-found ! ?dup
98: IF cell+ count $1F and rot /string rot drop
99: ELSE 2drop s" " THEN ;
100:
101: : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
102: prefix-found cell+ @ 0 ?DO (del) LOOP
103: 2dup extract-word search-prefix
104: dup prefix-found @ 0<> - prefix-found cell+ !
105: bounds ?DO I c@ (ins) LOOP
106: prefix-found @ IF bl (ins) THEN 0 ;
107:
108: : kill-prefix ( key -- key )
109: dup #tab <> IF 0 0 prefix-found 2! THEN ;
110:
111: ' kill-prefix IS everychar
112:
113: ' next-line ctrl N cells ctrlkeys + !
114: ' prev-line ctrl P cells ctrlkeys + !
115: ' clear-tib ctrl K cells ctrlkeys + !
116: ' first-pos ctrl A cells ctrlkeys + !
117: ' end-pos ctrl E cells ctrlkeys + !
118: ' (enter) #lf cells ctrlkeys + !
119: ' (enter) #cr cells ctrlkeys + !
120: ' tab-expand #tab cells ctrlkeys + !
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