gforth/history.fs - view

File: [gforth] / gforth / history.fs
Revision 1.12: download - view: text, annotated - select for diffs
Wed Aug 21 14:58:41 1996 UTC (26 years, 7 months ago) by anton
Branches: MAIN
CVS tags: 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

\ command line edit and history support 16oct94py \ Copyright (C) 1995 Free Software Foundation, Inc. \ This file is part of Gforth. \ Gforth is free software; you can redistribute it and/or \ modify it under the terms of the GNU General Public License \ as published by the Free Software Foundation; either version 2 \ of the License, or (at your option) any later version. \ This program is distributed in the hope that it will be useful, \ but WITHOUT ANY WARRANTY; without even the implied warranty of \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \ GNU General Public License for more details. \ You should have received a copy of the GNU General Public License \ along with this program; if not, write to the Free Software \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. :noname char [char] @ - ; :noname char [char] @ - postpone Literal ; interpret/compile: ctrl ( "<char>" -- ctrl-code ) \ command line editing 16oct94py : >string ( span addr pos1 -- span addr pos1 addr2 len ) over 3 pick 2 pick chars /string ; : type-rest ( span addr pos1 -- span addr pos1 back ) >string tuck type ; : (del) ( max span addr pos1 -- max span addr pos2 ) 1- >string over 1+ -rot move rot 1- -rot #bs emit type-rest bl emit 1+ backspaces ; : (ins) ( max span addr pos1 char -- max span addr pos2 ) >r >string over 1+ swap move 2dup chars + r> swap c! rot 1+ -rot type-rest 1- backspaces 1+ ; : ?del ( max span addr pos1 -- max span addr pos2 0 ) dup IF (del) THEN 0 ; : (ret) type-rest drop true space ; : back dup IF 1- #bs emit ELSE #bell emit THEN 0 ; : forw 2 pick over <> IF 2dup + c@ emit 1+ ELSE #bell emit THEN 0 ; : eof 2 pick over or 0= IF bye ELSE 2 pick over <> IF forw drop (del) ELSE #bell emit THEN 0 THEN ; ' forw ctrl F cells ctrlkeys + ! ' back ctrl B cells ctrlkeys + ! ' ?del ctrl H cells ctrlkeys + ! ' eof ctrl D cells ctrlkeys + ! ' (ins) IS insert-char \ history support 16oct94py 0 Value history 2Variable forward^ 2Variable backward^ 2Variable end^ : force-open ( addr len -- handle ) 2dup r/w open-file 0< IF drop r/w create-file throw ELSE nip nip THEN ; : get-history ( addr len -- wid ) force-open to history history file-size throw 2dup forward^ 2! 2dup backward^ 2! end^ 2! ; s" ~/.gforth-history" get-history : history-cold Defers 'cold s" ~/.gforth-history" get-history ; ' history-cold IS 'cold \ moving in history file 16oct94py : clear-line ( max span addr pos1 -- max addr ) backspaces over spaces swap backspaces ; : clear-tib ( max span addr pos -- max 0 addr 0 false ) clear-line 0 tuck dup ; : hist-pos ( -- ud ) history file-position throw ; : hist-setpos ( ud -- ) history reposition-file throw ; : get-line ( addr len -- len' flag ) swap history read-line throw ; : next-line ( max span addr pos1 -- max span addr pos2 false ) clear-line forward^ 2@ 2dup hist-setpos backward^ 2! 2dup get-line drop hist-pos forward^ 2! tuck 2dup type 0 ; : prev-line ( max span addr pos1 -- max span addr pos2 false ) clear-line backward^ 2@ forward^ 2! over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos BEGIN backward^ 2! 2dup get-line WHILE hist-pos 2dup forward^ 2@ d< WHILE rot drop REPEAT 2drop THEN tuck 2dup type 0 ; Create lfpad #lf c, : (enter) ( max span addr pos1 -- max span addr pos2 true ) >r end^ 2@ hist-setpos 2dup swap history write-line throw hist-pos 2dup backward^ 2! end^ 2! r> (ret) ; \ some other key commands 16oct94py : first-pos ( max span addr pos1 -- max span addr 0 0 ) backspaces 0 0 ; : end-pos ( max span addr pos1 -- max span addr span 0 ) type-rest 2drop over 0 ; : extract-word ( addr len -- addr' len' ) dup >r BEGIN 1- dup 0>= WHILE 2dup + c@ bl = UNTIL THEN 1+ tuck + r> rot - ; Create prefix-found 0 , 0 , : word-lex ( nfa1 nfa2 -- -1/0/1 ) dup 0= IF 2drop 1 EXIT THEN name>string 2>r name>string dup r@ = IF rdrop r> capscomp 0<= EXIT THEN r> < nip rdrop ; : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 ) >r BEGIN dup WHILE >r dup r@ name>string nip <= IF 2dup r@ name>string drop capscomp 0= IF r> dup r@ word-lex IF dup prefix-found @ word-lex 0>= IF rdrop dup >r THEN THEN >r THEN THEN r> @ REPEAT drop r> ; : prefix-string ( addr len nfa -- addr' len' ) dup prefix-found ! ?dup IF name>string rot /string rot drop dup 1+ prefix-found cell+ ! ELSE 2drop s" " prefix-found cell+ off THEN ; : search-prefix ( addr1 len1 -- addr2 len2 ) 0 vp dup @ 1- cells over + DO I 2@ <> IF I cell+ @ @ swap search-voc THEN [ -1 cells ] Literal +LOOP prefix-string ; : kill-expand ( max span addr pos1 -- max span addr pos2 ) prefix-found cell+ @ 0 ?DO (del) LOOP ; : tib-full? ( max span addr pos addr' len' -- max span addr pos addr1 u flag ) 5 pick over 4 pick + prefix-found @ 0<> - < ; : tab-expand ( max span addr pos1 -- max span addr pos2 0 ) kill-expand 2dup extract-word search-prefix tib-full? IF 7 emit 2drop 0 0 prefix-found 2! ELSE bounds ?DO I c@ (ins) LOOP THEN prefix-found @ IF bl (ins) THEN 0 ; : kill-prefix ( key -- key ) dup #tab <> IF 0 0 prefix-found 2! THEN ; ' kill-prefix IS everychar ' next-line ctrl N cells ctrlkeys + ! ' prev-line ctrl P cells ctrlkeys + ! ' clear-tib ctrl K cells ctrlkeys + ! ' first-pos ctrl A cells ctrlkeys + ! ' end-pos ctrl E cells ctrlkeys + ! ' (enter) #lf cells ctrlkeys + ! ' (enter) #cr cells ctrlkeys + ! ' tab-expand #tab cells ctrlkeys + !