[gforth] / gforth / history.fs  

gforth: gforth/history.fs

Diff for /gforth/history.fs between version 1.1 and 1.16

version 1.1, Tue Oct 18 15:57:17 1994 UTC version 1.16, Mon Dec 1 21:15:03 1997 UTC
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 \ History file support                                 16oct94py  \ command line edit and history support                 16oct94py
   
 0 Value history  \ 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 \ history file fid
   
 2Variable forward^  2Variable forward^
 2Variable backward^  2Variable backward^
 2Variable end^  2Variable end^
   
 : get-history ( addr len -- wid )  : force-open ( addr len -- fid )
   2dup r/w open-file 0<    2dup r/w open-file 0<
   IF  drop r/w create-file throw  ELSE  nip nip  THEN    IF  drop r/w create-file
         throw  ELSE  nip nip  THEN ;
   
   s" os-class" environment? [IF] s" unix" compare 0= [ELSE] true [THEN]
   [IF]
   : history-file ( -- addr u )
       s" GFORTHHIST" getenv dup 0= IF
           2drop s" ~/.gforth-history"
       THEN ;
   [ELSE]
   
   : history-dir ( -- addr u )
     s" TMP" getenv ?dup ?EXIT drop
     s" TEMP" getenv ?dup ?EXIT drop
     s" c:/" ;
   
   : history-file ( -- addr u )
     s" GFORTHHIST" getenv ?dup ?EXIT
     drop
     history-dir pad place
     s" /ghist.fs" pad +place pad count ;
   [THEN]
   
   : get-history ( addr len -- )
       ['] force-open catch
       dup 0< IF  ." can't open " history-file type cr throw  THEN  drop
   to history    to history
   history file-size throw    history file-size throw
   2dup forward^ 2! 2dup backward^ 2! end^ 2! ;    2dup forward^ 2! 2dup backward^ 2! end^ 2! ;
   
 s" gforth.history" get-history  : history-cold ( -- )
       history-file get-history ;
   
   ' history-cold INIT8 chained
   history-cold
   
 \ moving in history file                               16oct94py  \ moving in history file                               16oct94py
   
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 : clear-tib ( max span addr pos -- max 0 addr 0 false )  : clear-tib ( max span addr pos -- max 0 addr 0 false )
   clear-line 0 tuck dup ;    clear-line 0 tuck dup ;
   
 : get-line ( max addr -- max span addr pos dpos )  : hist-pos    ( -- ud )  history file-position throw ;
   history file-position throw  backward^ 2!  : hist-setpos ( ud -- )  history reposition-file throw ;
   2dup swap history read-line throw drop  
   2dup type tuck  : get-line ( addr len -- len' flag )
   history file-position throw  forward^ 2! ;    swap history read-line throw ;
   
 : next-line  ( max span addr pos1 -- max span addr pos2 false )  : next-line  ( max span addr pos1 -- max span addr pos2 false )
   clear-line    clear-line
   forward^ 2@ history reposition-file throw    forward^ 2@ 2dup hist-setpos backward^ 2!
   get-line  0 ;    2dup get-line drop
     hist-pos  forward^ 2!
     tuck 2dup type 0 ;
   
 : prev-line  ( max span addr pos1 -- max span addr pos2 false )  : prev-line  ( max span addr pos1 -- max span addr pos2 false )
   clear-line over 2 + negate s>d backward^ 2@ d+ 0. dmax    clear-line  backward^ 2@ forward^ 2!
   history reposition-file throw  0.    over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
   BEGIN   2over swap history read-line throw nip  WHILE    BEGIN
           history file-position throw        backward^ 2!   2dup get-line  WHILE
           2dup backward^ 2@ d<  WHILE  2swap 2drop        hist-pos 2dup forward^ 2@ d<  WHILE
         rot drop
   REPEAT  2drop  THEN    REPEAT  2drop  THEN
   history reposition-file throw get-line 0 ;    tuck 2dup type 0 ;
   
 : ctrl  ( "<char>" -- ctrl-code )  
   char [char] @ - postpone Literal ; immediate  
   
 Create lfpad #lf c,  Create lfpad #lf c,
   
 : (enter)  ( max span addr pos1 -- max span addr pos2 true )  : (enter)  ( max span addr pos1 -- max span addr pos2 true )
   >r end^ 2@ history reposition-file throw    >r end^ 2@ hist-setpos
   2dup swap history write-file throw    2dup swap history write-line throw
   lfpad 1 history write-file throw    hist-pos 2dup backward^ 2! end^ 2!
   history file-position throw 2dup backward^ 2! end^ 2!  
   r> (ret) ;    r> (ret) ;
   
 \ some other key commands                              16oct94py  \ some other key commands                              16oct94py
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 Create prefix-found  0 , 0 ,  Create prefix-found  0 , 0 ,
   
 : word-lex ( nfa1 nfa2 -- -1/0/1 )  : word-lex ( nfa1 nfa2 -- -1/0/1 )
   dup 0=  IF  2drop 1  EXIT  THEN      dup 0=
   cell+ >r cell+ count $1F and      IF
   dup r@ c@ $1F and =          2drop 1  EXIT
   IF  r> char+ capscomp 0<=  EXIT  THEN      THEN
   nip r> c@ $1F and < ;      name>string 2>r name>string
       dup r@ =
 : search-prefix  ( addr len1 -- suffix len2 )      IF
   context @ @  0 >r          rdrop r> capscomp 0<= EXIT
   BEGIN  dup  WHILE      THEN
          >r dup r@ cell+ c@ $1F and <=      r> <
          IF  2dup r@ cell+ char+ capscomp  0=      nip rdrop ;
              IF  r> dup r@ word-lex  
                  IF  dup prefix-found @ word-lex  : search-voc ( addr len nfa1 nfa2 -- addr len nfa3 )
                      0>= IF  rdrop dup >r  THEN      >r
                  THEN >r      BEGIN
              THEN          dup
          THEN  r> @      WHILE
   REPEAT drop r> dup prefix-found ! ?dup          >r dup r@ name>string nip <=
   IF    cell+ count $1F and rot /string rot drop          IF
   ELSE  2drop s" "  THEN  ;              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 )  : tab-expand ( max span addr pos1 -- max span addr pos2 0 )
   prefix-found cell+ @  0 ?DO  (del)  LOOP      kill-expand  2dup extract-word search-prefix
   2dup extract-word search-prefix      tib-full?
   dup prefix-found @ 0<> - prefix-found cell+ !      IF    7 emit  2drop  0 0 prefix-found 2!
   bounds ?DO  I c@ (ins)  LOOP      ELSE  bounds ?DO  I c@ (ins)  LOOP  THEN
   prefix-found @ IF  bl (ins)  THEN  0 ;    prefix-found @ IF  bl (ins)  THEN  0 ;
   
 : kill-prefix  ( key -- key )  : kill-prefix  ( key -- key )

Generate output suitable for use with a patch program
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Removed from v.1.1  
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  Added in v.1.16
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