version 1.13, 2005/01/05 22:13:40
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version 1.23, 2006/05/01 09:45:56
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\ UTF-8 handling 12dec04py |
\ UTF-8 handling 12dec04py |
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\ Copyright (C) 2004 Free Software Foundation, Inc. |
\ Copyright (C) 2004,2005 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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Line 27 $80 Value max-single-byte
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Line 27 $80 Value max-single-byte
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: u8len ( u8 -- n ) |
: u8len ( u8 -- n ) |
dup max-single-byte u< IF drop 1 EXIT THEN \ special case ASCII |
dup max-single-byte u< IF drop 1 EXIT THEN \ special case ASCII |
$800 2 >r |
$800 2 >r |
BEGIN 2dup u>= WHILE 5 lshift r> 1+ >r REPEAT |
BEGIN 2dup u>= WHILE 5 lshift r> 1+ >r dup 0= UNTIL THEN |
2drop r> ; |
2drop r> ; |
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: u8@+ ( u8addr -- u8addr' u ) |
: u8@+ ( u8addr -- u8addr' u ) |
count dup max-single-byte u< ?EXIT \ special case ASCII |
count dup max-single-byte u< ?EXIT \ special case ASCII |
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dup $C2 u< IF UTF-8-err throw THEN \ malformed character |
$7F and $40 >r |
$7F and $40 >r |
BEGIN dup r@ and WHILE r@ xor |
BEGIN dup r@ and WHILE r@ xor |
6 lshift r> 5 lshift >r >r count |
6 lshift r> 5 lshift >r >r count |
Line 72 $80 Value max-single-byte
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Line 73 $80 Value max-single-byte
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: u8key ( -- u ) |
: u8key ( -- u ) |
defers key dup max-single-byte u< ?EXIT \ special case ASCII |
defers key dup max-single-byte u< ?EXIT \ special case ASCII |
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dup $C2 u< IF UTF-8-err throw THEN \ malformed character |
$7F and $40 >r |
$7F and $40 >r |
BEGIN dup r@ and WHILE r@ xor |
BEGIN dup r@ and WHILE r@ xor |
6 lshift r> 5 lshift >r >r defers key |
6 lshift r> 5 lshift >r >r defers key |
Line 126 $80 Value max-single-byte
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Line 128 $80 Value max-single-byte
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nip nip over - |
nip nip over - |
then ; |
then ; |
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[IFUNDEF] wcwidth |
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: wcwidth abort ; |
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[THEN] |
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: u8width ( xcaddr u -- n ) |
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0 rot rot over + swap ?DO |
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I xc@+ swap >r wcwidth + |
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r> I - +LOOP ; |
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: set-encoding-utf-8 ( -- ) |
: set-encoding-utf-8 ( -- ) |
['] u8emit is xemit |
['] u8emit is xemit |
['] u8key is xkey |
['] u8key is xkey |
Line 137 $80 Value max-single-byte
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Line 148 $80 Value max-single-byte
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['] u8!+? is xc!+? |
['] u8!+? is xc!+? |
['] u8@+ is xc@+ |
['] u8@+ is xc@+ |
['] u8len is xc-size |
['] u8len is xc-size |
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[ [IFDEF] x-width ] |
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['] u8width is x-width |
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[ [THEN] ] |
['] -u8trailing-garbage is -trailing-garbage |
['] -u8trailing-garbage is -trailing-garbage |
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; |
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\ input editor |
: utf-8-cold ( -- ) |
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s" LC_ALL" getenv 2dup d0= IF 2drop |
[IFUNDEF] #esc 27 Constant #esc [THEN] |
s" LC_CTYPE" getenv 2dup d0= IF 2drop |
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s" LANG" getenv 2dup d0= IF 2drop |
: save-cursor ( -- ) #esc emit '7 emit ; |
s" C" THEN THEN THEN |
: restore-cursor ( -- ) #esc emit '8 emit ; |
s" UTF-8" search nip nip |
: .rest ( addr pos1 -- addr pos1 ) |
IF set-encoding-utf-8 ELSE set-encoding-fixed-width THEN ; |
restore-cursor 2dup type ; |
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: .all ( span addr pos1 -- span addr pos1 ) |
:noname ( -- ) |
restore-cursor >r 2dup swap type r> ; |
defers 'cold |
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utf-8-cold |
: <u8ins> ( max span addr pos1 u8char -- max span addr pos2 ) |
; is 'cold |
>r 2over r@ u8len + u< IF rdrop bell EXIT THEN |
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>string over r@ u8len + swap move 2dup chars + r@ swap u8!+ drop |
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r> u8len >r rot r@ chars + -rot r> chars + ; |
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: (u8ins) ( max span addr pos1 u8char -- max span addr pos2 ) |
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<u8ins> .all .rest ; |
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: u8back ( max span addr pos1 -- max span addr pos2 f ) |
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dup IF over + u8<< over - 0 max .all .rest |
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ELSE bell THEN 0 ; |
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: u8forw ( max span addr pos1 -- max span addr pos2 f ) |
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2 pick over <> IF over + u8@+ u8emit over - ELSE bell THEN 0 ; |
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: (u8del) ( max span addr pos1 -- max span addr pos2 ) |
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over + dup u8<< tuck - >r over - |
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>string over r@ + -rot move |
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rot r> - -rot ; |
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: ?u8del ( max span addr pos1 -- max span addr pos2 0 ) |
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dup IF (u8del) .all 2 spaces .rest THEN 0 ; |
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: <u8del> ( max span addr pos1 -- max span addr pos2 0 ) |
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2 pick over <> |
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IF u8forw drop (u8del) .all 2 spaces .rest |
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ELSE bell THEN 0 ; |
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: u8eof 2 pick over or 0= IF bye ELSE <u8del> THEN ; |
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: u8first-pos ( max span addr pos1 -- max span addr 0 0 ) |
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drop 0 .all .rest 0 ; |
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: u8end-pos ( max span addr pos1 -- max span addr span 0 ) |
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drop over .all 0 ; |
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: u8clear-line ( max span addr pos1 -- max addr ) |
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drop restore-cursor swap spaces restore-cursor ; |
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: u8clear-tib ( max span addr pos -- max 0 addr 0 false ) |
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u8clear-line 0 tuck dup ; |
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: (u8enter) ( max span addr pos1 -- max span addr pos2 true ) |
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>r end^ 2@ hist-setpos |
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2dup swap history write-line drop ( throw ) \ don't worry about errors |
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hist-pos 2dup backward^ 2! end^ 2! |
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r> .all space true ; |
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: u8kill-expand ( max span addr pos1 -- max span addr pos2 ) |
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prefix-found cell+ @ ?dup IF >r |
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r@ - >string over r@ + -rot move |
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rot r@ - -rot .all r> spaces .rest THEN ; |
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: insert ( string length buffer size -- ) |
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rot over min >r r@ - ( left over ) |
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over dup r@ + rot move r> move ; |
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: u8tab-expand ( max span addr pos1 -- max span addr pos2 0 ) |
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key? IF #tab (u8ins) 0 EXIT THEN |
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u8kill-expand 2dup extract-word dup 0= IF nip EXIT THEN |
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search-prefix tib-full? |
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IF 7 emit 2drop prefix-off |
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ELSE dup >r |
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2>r >string r@ + 2r> 2swap insert |
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r@ + rot r> + -rot |
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THEN |
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prefix-found @ IF bl (u8ins) ELSE .all .rest THEN 0 ; |
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: utf-8-io ( -- ) |
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['] u8forw ctrl F bindkey |
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['] u8back ctrl B bindkey |
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['] ?u8del ctrl H bindkey |
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['] u8eof ctrl D bindkey |
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['] <u8del> ctrl X bindkey |
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['] u8clear-tib ctrl K bindkey |
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['] u8first-pos ctrl A bindkey |
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['] u8end-pos ctrl E bindkey |
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['] (u8enter) #lf bindkey |
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['] (u8enter) #cr bindkey |
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['] u8tab-expand #tab bindkey |
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['] (u8ins) IS insert-char |
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['] kill-prefix IS everychar |
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['] save-cursor IS everyline |
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['] u8key IS key |
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['] u8emit IS emit ; |
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utf-8-cold |