[gforth] / gforth / history.fs  

gforth: gforth/history.fs

Diff for /gforth/history.fs between version 1.18 and 1.26

version 1.18, Sun Dec 12 12:49:51 1999 UTC version 1.26, Sat Sep 23 15:46:57 2000 UTC
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 \ command line edit and history support                 16oct94py  \ command line edit and history support                 16oct94py
   
 \ Copyright (C) 1995 Free Software Foundation, Inc.  \ Copyright (C) 1995,2000 Free Software Foundation, Inc.
   
 \ This file is part of Gforth.  \ This file is part of Gforth.
   
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 \ You should have received a copy of the GNU General Public License  \ You should have received a copy of the GNU General Public License
 \ along with this program; if not, write to the Free Software  \ along with this program; if not, write to the Free Software
 \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   
 :noname  :noname
     char [char] @ - ;      char [char] @ - ;
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 : (ret)  type-rest drop true space ;  : (ret)  type-rest drop true space ;
 : back  dup  IF  1- #bs emit  ELSE  #bell emit  THEN 0 ;  : 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 ;  : forw 2 pick over <> IF  2dup + c@ emit 1+  ELSE  #bell emit  THEN 0 ;
 : eof  2 pick over or 0=  IF  : <del> ( max span addr pos1 -- max span addr pos2 0 )
         bye    2 pick over <>
     ELSE  2 pick over <>          IF  forw drop (del)  ELSE  #bell emit  THEN  0 ;
         IF  forw drop (del)  ELSE  #bell emit  THEN  0  : eof  2 pick over or 0=  IF  bye  ELSE  <del>  THEN ;
     THEN ;  
   
 ' forw  ctrl F cells ctrlkeys + !  ' forw  ctrl F cells ctrlkeys + !
 ' back  ctrl B cells ctrlkeys + !  ' back  ctrl B cells ctrlkeys + !
 ' ?del  ctrl H cells ctrlkeys + !  ' ?del  ctrl H cells ctrlkeys + !
 ' eof   ctrl D cells ctrlkeys + !  ' eof   ctrl D cells ctrlkeys + !
   ' <del> ctrl X cells ctrlkeys + !
   
 ' (ins) IS insert-char  ' (ins) IS insert-char
   
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 2Variable end^  2Variable end^
   
 : force-open ( addr len -- fid )  : force-open ( addr len -- fid )
   2dup r/w open-file 0<      2dup r/w open-file
   IF  drop r/w create-file      IF
       throw ELSE  nip nip  THEN ;          drop r/w create-file throw
       ELSE
           nip nip
       THEN ;
   
 s" os-class" environment? [IF] s" unix" compare 0= [ELSE] true [THEN]  s" os-class" environment? [IF] s" unix" compare 0= [ELSE] true [THEN]
 [IF]  [IF]
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   s" /ghist.fs" pad +place pad count ;    s" /ghist.fs" pad +place pad count ;
 [THEN]  [THEN]
   
 : get-history ( addr len -- )  
     ['] force-open catch  
     dup 0< IF  ." can't open " history-file type cr throw  THEN  drop  
     to history  
     history file-size throw  
     2dup forward^ 2! 2dup backward^ 2! end^ 2! ;  
   
 : history-cold ( -- )  
     history-file get-history ;  
   
 ' history-cold INIT8 chained  
 history-cold  
   
 \ moving in history file                               16oct94py  \ moving in history file                               16oct94py
   
 : clear-line ( max span addr pos1 -- max addr )  : clear-line ( max span addr pos1 -- max addr )
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   hist-pos  forward^ 2!    hist-pos  forward^ 2!
   tuck 2dup type 0 ;    tuck 2dup type 0 ;
   
 : prev-line  ( max span addr pos1 -- max span addr pos2 false )  : find-prev-line ( max addr -- max span addr pos2 )
   clear-line  backward^ 2@ forward^ 2!    backward^ 2@ forward^ 2!
   over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos    over 2 + negate s>d backward^ 2@ d+ 0. dmax 2dup hist-setpos
   BEGIN    BEGIN
       backward^ 2!   2dup get-line  WHILE        backward^ 2!   2dup get-line  WHILE
       hist-pos 2dup forward^ 2@ d<  WHILE        hist-pos 2dup forward^ 2@ d<  WHILE
       rot drop        rot drop
   REPEAT  2drop  THEN    REPEAT  2drop  THEN  tuck ;
   tuck 2dup type 0 ;  
   : prev-line  ( max span addr pos1 -- max span addr pos2 false )
       clear-line find-prev-line 2dup type 0 ;
   
 Create lfpad #lf c,  Create lfpad #lf c,
   
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     5 pick over 4 pick + prefix-found @ 0<> - < ;      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 )
     kill-expand  2dup extract-word search-prefix      kill-expand  2dup extract-word dup 0= IF  nip EXIT  THEN
     tib-full?      search-prefix  tib-full?
     IF    7 emit  2drop  0 0 prefix-found 2!      IF    7 emit  2drop  0 0 prefix-found 2!
     ELSE  bounds ?DO  I c@ (ins)  LOOP  THEN      ELSE  bounds ?DO  I c@ (ins)  LOOP  THEN
     prefix-found @ IF  bl (ins)  THEN  0 ;      prefix-found @ IF  bl (ins)  THEN  0 ;
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 ' (enter)    #lf    cells ctrlkeys + !  ' (enter)    #lf    cells ctrlkeys + !
 ' (enter)    #cr    cells ctrlkeys + !  ' (enter)    #cr    cells ctrlkeys + !
 ' tab-expand #tab   cells ctrlkeys + !  ' tab-expand #tab   cells ctrlkeys + !
   
   \ initializing history
   
   : get-history ( addr len -- )
       ['] force-open catch
       ?dup-if
           \ !! >stderr
           \ history-file type ." : " .error cr
           drop 2drop
           ['] false ['] false ['] (ret)
       else
           to history
           history file-size throw
           2dup forward^ 2! 2dup backward^ 2! end^ 2!
           ['] next-line ['] prev-line ['] (enter)
       endif
       dup
       [ #lf    cells ctrlkeys + ]L !
       [ #cr    cells ctrlkeys + ]L !
       [ ctrl P cells ctrlkeys + ]L !
       [ ctrl N cells ctrlkeys + ]L !
   ;
   
   : history-cold ( -- )
       history-file get-history ;
   
   ' history-cold INIT8 chained
   history-cold
   

Generate output suitable for use with a patch program
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  Added in v.1.26
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