version 1.3, 2004/12/12 22:20:00
|
version 1.24, 2006/08/26 12:39:57
|
Line 1
|
Line 1
|
\ UTF-8 handling 12dec04py |
\ UTF-8 handling 12dec04py |
|
|
\ Copyright (C) 2004 Free Software Foundation, Inc. |
\ Copyright (C) 2004,2005 Free Software Foundation, Inc. |
|
|
\ This file is part of Gforth. |
\ This file is part of Gforth. |
|
|
Line 20
|
Line 20
|
|
|
\ short: u8 means utf-8 encoded address |
\ short: u8 means utf-8 encoded address |
|
|
: u8len ( u -- n ) |
s" malformed UTF-8 character" exception Constant UTF-8-err |
dup $80 u< IF drop 1 EXIT THEN \ special case ASCII |
|
|
$80 Value max-single-byte |
|
|
|
: u8len ( u8 -- n ) |
|
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> ; |
|
|
: u8@+ ( u8addr -- u8addr' u ) |
: u8@+ ( u8addr -- u8addr' u ) |
count dup $80 and 0= ?EXIT \ special case ASCII |
count dup max-single-byte u< ?EXIT \ special case ASCII |
|
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 |
\ dup $C0 and $80 <> abort" malformed character" |
dup $C0 and $80 <> IF UTF-8-err throw THEN |
$3F and r> or |
$3F and r> or |
REPEAT rdrop ; |
REPEAT rdrop ; |
|
|
: u8!+ ( u u8addr -- u8addr' ) |
: u8!+ ( u u8addr -- u8addr' ) |
over $80 < IF tuck c! 1+ EXIT THEN \ special case ASCII |
over max-single-byte u< IF tuck c! 1+ EXIT THEN \ special case ASCII |
>r 0 swap $3F |
>r 0 swap $3F |
BEGIN 2dup u> WHILE |
BEGIN 2dup u> WHILE |
2/ >r dup $3F and $80 or swap 6 rshift r> |
2/ >r dup $3F and $80 or swap 6 rshift r> |
REPEAT $7F xor 2* or r> |
REPEAT $7F xor 2* or r> |
BEGIN over $80 u>= WHILE tuck c! 1+ REPEAT nip ; |
BEGIN over $80 u>= WHILE tuck c! 1+ REPEAT nip ; |
|
|
|
\ plug-in so that char and '<char> work for UTF-8 |
|
|
|
[ifundef] char@ \ !! bootstrapping help |
|
Defer char@ ( addr u -- char addr' u' ) |
|
:noname over c@ -rot 1 /string ; IS char@ |
|
[then] |
|
|
|
:noname ( addr u -- char addr' u' ) |
|
\ !! the if here seems to work around some breakage, but not |
|
\ entirely; e.g., try 'รง' with LANG=C. |
|
dup 1 u<= IF defers char@ EXIT THEN |
|
over + >r u8@+ swap r> over - ; IS char@ |
|
|
\ scan to next/previous character |
\ scan to next/previous character |
|
|
: u8>> ( u8addr -- u8addr' ) |
\ alternative names: u8char+ u8char- |
BEGIN count $C0 and $80 <> UNTIL ; |
|
|
: u8>> ( u8addr -- u8addr' ) u8@+ drop ; |
: u8<< ( u8addr -- u8addr' ) |
: u8<< ( u8addr -- u8addr' ) |
BEGIN 1- dup c@ $C0 and $80 <> UNTIL ; |
BEGIN 1- dup c@ $C0 and max-single-byte <> UNTIL ; |
|
|
\ utf key and emit |
\ utf key and emit |
|
|
: u8key ( -- u ) |
: u8key ( -- u ) |
defers key dup $80 and 0= ?EXIT \ special case ASCII |
defers key dup max-single-byte u< ?EXIT \ special case ASCII |
|
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 |
\ dup $C0 and $80 <> abort" malformed character" |
dup $C0 and $80 <> IF UTF-8-err throw THEN |
$3F and r> or |
$3F and r> or |
REPEAT rdrop ; |
REPEAT rdrop ; |
|
|
: u8emit ( u -- ) |
: u8emit ( u -- ) |
dup $80 < IF defers emit EXIT THEN \ special case ASCII |
dup max-single-byte u< IF defers emit EXIT THEN \ special case ASCII |
0 swap $3F |
0 swap $3F |
BEGIN 2dup u> WHILE |
BEGIN 2dup u> WHILE |
2/ >r dup $3F and $80 or swap 6 rshift r> |
2/ >r dup $3F and $80 or swap 6 rshift r> |
REPEAT $7F xor 2* or |
REPEAT $7F xor 2* or |
BEGIN dup $80 u>= WHILE defers emit REPEAT drop ; |
BEGIN dup $80 u>= WHILE defers emit REPEAT drop ; |
|
|
\ input editor |
\ utf-8 stuff for xchars |
|
|
|
: +u8/string ( c-addr1 u1 -- c-addr2 u2 ) |
|
over dup u8>> swap - /string ; |
|
|
|
: -u8/string ( c-addr1 u1 -- c-addr2 u2 ) |
|
over dup u8<< swap - /string ; |
|
|
|
: u8@ ( c-addr -- u ) |
|
u8@+ nip ; |
|
|
|
: u8!+? ( xc xc-addr1 u1 -- xc-addr2 u2 f ) |
|
>r over u8len r@ over u< if ( xc xc-addr1 len r: u1 ) |
|
\ not enough space |
|
drop nip r> false |
|
else |
|
>r u8!+ r> r> swap - true |
|
then ; |
|
|
|
: u8addrlen ( u8-addr -- u ) |
|
\ length of UTF-8 char starting at u8-addr (accesses only u8-addr) |
|
c@ |
|
dup $80 u< if drop 1 exit endif |
|
dup $c0 u< if UTF-8-err throw endif |
|
dup $e0 u< if drop 2 exit endif |
|
dup $f0 u< if drop 3 exit endif |
|
dup $f8 u< if drop 4 exit endif |
|
dup $fc u< if drop 5 exit endif |
|
dup $fe u< if drop 6 exit endif |
|
UTF-8-err throw ; |
|
|
|
: -u8trailing-garbage ( addr u1 -- addr u2 ) |
|
2dup + dup u8<< ( addr u1 end1 end2 ) |
|
2dup dup u8addrlen + = if \ last character ok |
|
2drop |
|
else |
|
nip nip over - |
|
then ; |
|
|
|
[IFUNDEF] wcwidth |
|
: wc,3 ( n low high -- ) 1+ , , , ; |
|
|
|
Create wc-table \ derived from wcwidth source code, for UCS32 |
|
0 0300 0357 wc,3 |
|
0 035D 036F wc,3 |
|
0 0483 0486 wc,3 |
|
0 0488 0489 wc,3 |
|
0 0591 05A1 wc,3 |
|
0 05A3 05B9 wc,3 |
|
0 05BB 05BD wc,3 |
|
0 05BF 05BF wc,3 |
|
0 05C1 05C2 wc,3 |
|
0 05C4 05C4 wc,3 |
|
0 0600 0603 wc,3 |
|
0 0610 0615 wc,3 |
|
0 064B 0658 wc,3 |
|
0 0670 0670 wc,3 |
|
0 06D6 06E4 wc,3 |
|
0 06E7 06E8 wc,3 |
|
0 06EA 06ED wc,3 |
|
0 070F 070F wc,3 |
|
0 0711 0711 wc,3 |
|
0 0730 074A wc,3 |
|
0 07A6 07B0 wc,3 |
|
0 0901 0902 wc,3 |
|
0 093C 093C wc,3 |
|
0 0941 0948 wc,3 |
|
0 094D 094D wc,3 |
|
0 0951 0954 wc,3 |
|
0 0962 0963 wc,3 |
|
0 0981 0981 wc,3 |
|
0 09BC 09BC wc,3 |
|
0 09C1 09C4 wc,3 |
|
0 09CD 09CD wc,3 |
|
0 09E2 09E3 wc,3 |
|
0 0A01 0A02 wc,3 |
|
0 0A3C 0A3C wc,3 |
|
0 0A41 0A42 wc,3 |
|
0 0A47 0A48 wc,3 |
|
0 0A4B 0A4D wc,3 |
|
0 0A70 0A71 wc,3 |
|
0 0A81 0A82 wc,3 |
|
0 0ABC 0ABC wc,3 |
|
0 0AC1 0AC5 wc,3 |
|
0 0AC7 0AC8 wc,3 |
|
0 0ACD 0ACD wc,3 |
|
0 0AE2 0AE3 wc,3 |
|
0 0B01 0B01 wc,3 |
|
0 0B3C 0B3C wc,3 |
|
0 0B3F 0B3F wc,3 |
|
0 0B41 0B43 wc,3 |
|
0 0B4D 0B4D wc,3 |
|
0 0B56 0B56 wc,3 |
|
0 0B82 0B82 wc,3 |
|
0 0BC0 0BC0 wc,3 |
|
0 0BCD 0BCD wc,3 |
|
0 0C3E 0C40 wc,3 |
|
0 0C46 0C48 wc,3 |
|
0 0C4A 0C4D wc,3 |
|
0 0C55 0C56 wc,3 |
|
0 0CBC 0CBC wc,3 |
|
0 0CBF 0CBF wc,3 |
|
0 0CC6 0CC6 wc,3 |
|
0 0CCC 0CCD wc,3 |
|
0 0D41 0D43 wc,3 |
|
0 0D4D 0D4D wc,3 |
|
0 0DCA 0DCA wc,3 |
|
0 0DD2 0DD4 wc,3 |
|
0 0DD6 0DD6 wc,3 |
|
0 0E31 0E31 wc,3 |
|
0 0E34 0E3A wc,3 |
|
0 0E47 0E4E wc,3 |
|
0 0EB1 0EB1 wc,3 |
|
0 0EB4 0EB9 wc,3 |
|
0 0EBB 0EBC wc,3 |
|
0 0EC8 0ECD wc,3 |
|
0 0F18 0F19 wc,3 |
|
0 0F35 0F35 wc,3 |
|
0 0F37 0F37 wc,3 |
|
0 0F39 0F39 wc,3 |
|
0 0F71 0F7E wc,3 |
|
0 0F80 0F84 wc,3 |
|
0 0F86 0F87 wc,3 |
|
0 0F90 0F97 wc,3 |
|
0 0F99 0FBC wc,3 |
|
0 0FC6 0FC6 wc,3 |
|
0 102D 1030 wc,3 |
|
0 1032 1032 wc,3 |
|
0 1036 1037 wc,3 |
|
0 1039 1039 wc,3 |
|
0 1058 1059 wc,3 |
|
1 0000 1100 wc,3 |
|
2 1100 115f wc,3 |
|
0 1160 11FF wc,3 |
|
0 1712 1714 wc,3 |
|
0 1732 1734 wc,3 |
|
0 1752 1753 wc,3 |
|
0 1772 1773 wc,3 |
|
0 17B4 17B5 wc,3 |
|
0 17B7 17BD wc,3 |
|
0 17C6 17C6 wc,3 |
|
0 17C9 17D3 wc,3 |
|
0 17DD 17DD wc,3 |
|
0 180B 180D wc,3 |
|
0 18A9 18A9 wc,3 |
|
0 1920 1922 wc,3 |
|
0 1927 1928 wc,3 |
|
0 1932 1932 wc,3 |
|
0 1939 193B wc,3 |
|
0 200B 200F wc,3 |
|
0 202A 202E wc,3 |
|
0 2060 2063 wc,3 |
|
0 206A 206F wc,3 |
|
0 20D0 20EA wc,3 |
|
2 2329 232A wc,3 |
|
0 302A 302F wc,3 |
|
2 2E80 303E wc,3 |
|
0 3099 309A wc,3 |
|
2 3040 A4CF wc,3 |
|
2 AC00 D7A3 wc,3 |
|
2 F900 FAFF wc,3 |
|
0 FB1E FB1E wc,3 |
|
0 FE00 FE0F wc,3 |
|
0 FE20 FE23 wc,3 |
|
2 FE30 FE6F wc,3 |
|
0 FEFF FEFF wc,3 |
|
2 FF00 FF60 wc,3 |
|
2 FFE0 FFE6 wc,3 |
|
0 FFF9 FFFB wc,3 |
|
0 1D167 1D169 wc,3 |
|
0 1D173 1D182 wc,3 |
|
0 1D185 1D18B wc,3 |
|
0 1D1AA 1D1AD wc,3 |
|
2 20000 2FFFD wc,3 |
|
2 30000 3FFFD wc,3 |
|
0 E0001 E0001 wc,3 |
|
0 E0020 E007F wc,3 |
|
0 E0100 E01EF wc,3 |
|
here wc-table - Constant #wc-table |
|
|
|
\ inefficient table walk: |
|
|
|
: wcwidth ( xc -- n ) |
|
wc-table #wc-table over + swap ?DO |
|
dup I 2@ within IF I 2 cells + @ UNLOOP EXIT THEN |
|
3 cells +LOOP 1 ; |
|
[THEN] |
|
|
|
: u8width ( xcaddr u -- n ) |
|
0 rot rot over + swap ?DO |
|
I xc@+ swap >r wcwidth + |
|
r> I - +LOOP ; |
|
|
|
: set-encoding-utf-8 ( -- ) |
|
['] u8emit is xemit |
|
['] u8key is xkey |
|
['] u8>> is xchar+ |
|
['] u8<< is xchar- |
|
['] +u8/string is +x/string |
|
['] -u8/string is -x/string |
|
['] u8@ is xc@ |
|
['] u8!+? is xc!+? |
|
['] u8@+ is xc@+ |
|
['] u8len is xc-size |
|
[ [IFDEF] x-width ] |
|
['] u8width is x-width |
|
[ [THEN] ] |
|
['] -u8trailing-garbage is -trailing-garbage |
|
; |
|
|
|
: utf-8-cold ( -- ) |
|
s" LC_ALL" getenv 2dup d0= IF 2drop |
|
s" LC_CTYPE" getenv 2dup d0= IF 2drop |
|
s" LANG" getenv 2dup d0= IF 2drop |
|
s" C" THEN THEN THEN |
|
s" UTF-8" search nip nip |
|
IF set-encoding-utf-8 ELSE set-encoding-fixed-width THEN ; |
|
|
|
:noname ( -- ) |
|
defers 'cold |
|
utf-8-cold |
|
; is 'cold |
|
|
: save-cursor ( -- ) 27 emit '7 emit ; |
utf-8-cold |
: restore-cursor ( -- ) 27 emit '8 emit ; |
|
: .rest ( addr pos1 -- addr pos1 ) |
|
restore-cursor 2dup type ; |
|
: .all ( span addr pos1 -- span addr pos1 ) |
|
restore-cursor >r 2dup swap type r> ; |
|
|
|
: <u8ins> ( max span addr pos1 u8char -- max span addr pos2 ) |
|
>r >string over r@ u8len + swap move 2dup chars + r@ swap u8!+ drop |
|
r> u8len >r rot r@ chars + -rot r> chars + ; |
|
: (u8ins) ( max span addr pos1 u8char -- max span addr pos2 ) |
|
<u8ins> .all .rest ; |
|
: u8back ( max span addr pos1 -- max span addr pos2 f ) |
|
dup IF over + u8<< over - 0 max .all .rest |
|
ELSE #bell emit THEN 0 ; |
|
: u8forw ( max span addr pos1 -- max span addr pos2 f ) |
|
2 pick over <> IF over + u8@+ u8emit over - ELSE #bell emit THEN 0 ; |
|
: (u8del) ( max span addr pos1 -- max span addr pos2 ) |
|
over + dup u8<< tuck - >r over - |
|
>string over r@ + -rot move |
|
rot r> - -rot ; |
|
: ?u8del ( max span addr pos1 -- max span addr pos2 0 ) |
|
dup IF (u8del) .all 2 spaces .rest THEN 0 ; |
|
: <u8del> ( max span addr pos1 -- max span addr pos2 0 ) |
|
2 pick over <> |
|
IF u8forw drop (u8del) .all 2 spaces .rest |
|
ELSE #bell emit THEN 0 ; |
|
: u8eof 2 pick over or 0= IF bye ELSE <u8del> THEN ; |
|
|
|
: u8first-pos ( max span addr pos1 -- max span addr 0 0 ) |
|
drop 0 .all .rest 0 ; |
|
: u8end-pos ( max span addr pos1 -- max span addr span 0 ) |
|
drop over .all 0 ; |
|
|
|
|
|
: u8clear-line ( max span addr pos1 -- max addr ) |
|
drop restore-cursor swap spaces restore-cursor ; |
|
: u8clear-tib ( max span addr pos -- max 0 addr 0 false ) |
|
u8clear-line 0 tuck dup ; |
|
|
|
: (u8enter) ( max span addr pos1 -- max span addr pos2 true ) |
|
>r end^ 2@ hist-setpos |
|
2dup swap history write-line drop ( throw ) \ don't worry about errors |
|
hist-pos 2dup backward^ 2! end^ 2! |
|
r> .all space true ; |
|
|
|
: u8kill-expand ( max span addr pos1 -- max span addr pos2 ) |
|
prefix-found cell+ @ ?dup IF >r |
|
r@ - >string over r@ + -rot move |
|
rot r@ - -rot .all r> spaces .rest THEN ; |
|
|
|
: insert ( string length buffer size -- ) |
|
rot over min >r r@ - ( left over ) |
|
over dup r@ + rot move r> move ; |
|
|
|
: u8tab-expand ( max span addr pos1 -- max span addr pos2 0 ) |
|
key? IF #tab (u8ins) 0 EXIT THEN |
|
u8kill-expand 2dup extract-word dup 0= IF nip EXIT THEN |
|
search-prefix tib-full? |
|
IF 7 emit 2drop 0 0 prefix-found 2! |
|
ELSE dup >r |
|
2>r >string r@ + 2r> 2swap insert |
|
r@ + rot r> + -rot |
|
THEN |
|
prefix-found @ IF bl (u8ins) THEN 0 ; |
|
|
|
' u8forw ctrl F bindkey |
|
' u8back ctrl B bindkey |
|
' ?u8del ctrl H bindkey |
|
' u8eof ctrl D bindkey |
|
' <u8del> ctrl X bindkey |
|
' u8clear-tib ctrl K bindkey |
|
' u8first-pos ctrl A bindkey |
|
' u8end-pos ctrl E bindkey |
|
' (u8enter) #lf bindkey |
|
' (u8enter) #cr bindkey |
|
' u8tab-expand #tab bindkey |
|
' (u8ins) IS insert-char |
|
' save-cursor IS everyline |
|
' u8key IS key |
|
' u8emit IS emit |
|