version 1.2, 2004/12/12 20:24:00
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version 1.41, 2010/02/14 18:04:16
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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) 2004,2005,2006,2007,2008,2009 Free Software Foundation, Inc. |
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\ This file is part of Gforth. |
\ This file is part of Gforth. |
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\ Gforth is free software; you can redistribute it and/or |
\ Gforth is free software; you can redistribute it and/or |
\ modify it under the terms of the GNU General Public License |
\ modify it under the terms of the GNU General Public License |
\ as published by the Free Software Foundation; either version 2 |
\ as published by the Free Software Foundation, either version 3 |
\ of the License, or (at your option) any later version. |
\ of the License, or (at your option) any later version. |
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\ This program is distributed in the hope that it will be useful, |
\ This program is distributed in the hope that it will be useful, |
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\ GNU General Public License for more details. |
\ GNU General Public License for more details. |
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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, see http://www.gnu.org/licenses/. |
\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. |
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\ short: u8 means utf-8 encoded address |
\ short: u8 means utf-8 encoded address |
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: u8len ( u -- n ) |
s" malformed UTF-8 character" exception Constant UTF-8-err |
dup $80 u< IF drop 1 EXIT THEN \ special case ASCII |
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$80 Value max-single-byte |
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: u8len ( u8 -- n ) |
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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 $80 and 0= ?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 |
\ 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 ; |
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: 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 ; |
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\ plug-in so that char and '<char> work for UTF-8 |
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[ifundef] char@ \ !! bootstrapping help |
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Defer char@ ( addr u -- char addr' u' ) |
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:noname over c@ -rot 1 /string ; IS char@ |
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[then] |
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:noname ( addr u -- char addr' u' ) |
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\ !! the if here seems to work around some breakage, but not |
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\ entirely; e.g., try 'รง' with LANG=C. |
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dup 1 u<= IF defers char@ EXIT THEN |
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over + >r u8@+ swap r> over - ; IS char@ |
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\ scan to next/previous character |
\ scan to next/previous character |
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: u8>> ( u8addr -- u8addr' ) |
\ alternative names: u8char+ u8char- |
BEGIN count $C0 and $80 <> UNTIL ; |
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: 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 ; |
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\ utf key and emit |
\ utf key and emit |
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Defer check-xy ' noop IS check-xy |
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: u8key ( -- u ) |
: u8key ( -- u ) |
defers key dup $80 and 0= ?EXIT \ special case ASCII |
key dup max-single-byte u< ?EXIT \ special case ASCII |
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dup $FF = ?EXIT \ special resize character |
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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 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 ; |
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: u8emit ( u -- ) |
: u8emit ( u -- ) |
dup $80 < IF defers emit EXIT THEN \ special case ASCII |
dup max-single-byte u< IF 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 emit REPEAT drop ; |
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\ utf-8 stuff for xchars |
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\ input editor |
: +u8/string ( xc-addr1 u1 -- xc-addr2 u2 ) |
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over dup u8>> swap - /string ; |
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: u8\string- ( xcaddr u -- xcaddr u' ) |
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over + u8<< over - ; |
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: u8@ ( c-addr -- u ) |
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u8@+ nip ; |
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: u8!+? ( xc xc-addr1 u1 -- xc-addr2 u2 f ) |
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>r over u8len r@ over u< if ( xc xc-addr1 len r: u1 ) |
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\ not enough space |
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drop nip r> false |
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else |
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>r u8!+ r> r> swap - true |
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then ; |
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: u8addrlen ( u8-addr u -- u ) drop |
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\ length of UTF-8 char starting at u8-addr (accesses only u8-addr) |
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c@ |
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dup $80 u< if drop 1 exit endif |
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dup $c0 u< if UTF-8-err throw endif |
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dup $e0 u< if drop 2 exit endif |
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dup $f0 u< if drop 3 exit endif |
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dup $f8 u< if drop 4 exit endif |
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dup $fc u< if drop 5 exit endif |
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dup $fe u< if drop 6 exit endif |
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dup $ff u< if drop 7 exit endif |
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drop 8 ; |
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: -u8trailing-garbage ( addr u1 -- addr u2 ) |
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2dup + dup u8<< ( addr u1 end1 end2 ) |
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2dup dup over over - u8addrlen + = if \ last character ok |
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2drop |
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else |
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nip nip over - |
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then ; |
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[IFUNDEF] wcwidth |
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: wc,3 ( n low high -- ) 1+ , , , ; |
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Create wc-table \ derived from wcwidth source code, for UCS32 |
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0 $0300 $0357 wc,3 |
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0 $035D $036F wc,3 |
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0 $0483 $0486 wc,3 |
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0 $0488 $0489 wc,3 |
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0 $0591 $05A1 wc,3 |
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0 $05A3 $05B9 wc,3 |
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0 $05BB $05BD wc,3 |
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0 $05BF $05BF wc,3 |
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0 $05C1 $05C2 wc,3 |
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0 $05C4 $05C4 wc,3 |
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0 $0600 $0603 wc,3 |
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0 $0610 $0615 wc,3 |
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0 $064B $0658 wc,3 |
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0 $0670 $0670 wc,3 |
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0 $06D6 $06E4 wc,3 |
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0 $06E7 $06E8 wc,3 |
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0 $06EA $06ED wc,3 |
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0 $070F $070F wc,3 |
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0 $0711 $0711 wc,3 |
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0 $0730 $074A wc,3 |
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0 $07A6 $07B0 wc,3 |
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0 $0901 $0902 wc,3 |
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0 $093C $093C wc,3 |
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0 $0941 $0948 wc,3 |
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0 $094D $094D wc,3 |
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0 $0951 $0954 wc,3 |
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0 $0962 $0963 wc,3 |
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0 $0981 $0981 wc,3 |
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0 $09BC $09BC wc,3 |
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0 $09C1 $09C4 wc,3 |
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0 $09CD $09CD wc,3 |
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0 $09E2 $09E3 wc,3 |
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0 $0A01 $0A02 wc,3 |
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0 $0A3C $0A3C wc,3 |
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0 $0A41 $0A42 wc,3 |
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0 $0A47 $0A48 wc,3 |
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0 $0A4B $0A4D wc,3 |
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0 $0A70 $0A71 wc,3 |
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0 $0A81 $0A82 wc,3 |
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0 $0ABC $0ABC wc,3 |
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0 $0AC1 $0AC5 wc,3 |
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0 $0AC7 $0AC8 wc,3 |
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0 $0ACD $0ACD wc,3 |
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0 $0AE2 $0AE3 wc,3 |
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0 $0B01 $0B01 wc,3 |
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0 $0B3C $0B3C wc,3 |
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0 $0B3F $0B3F wc,3 |
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0 $0B41 $0B43 wc,3 |
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0 $0B4D $0B4D wc,3 |
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0 $0B56 $0B56 wc,3 |
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0 $0B82 $0B82 wc,3 |
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0 $0BC0 $0BC0 wc,3 |
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0 $0BCD $0BCD wc,3 |
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0 $0C3E $0C40 wc,3 |
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0 $0C46 $0C48 wc,3 |
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0 $0C4A $0C4D wc,3 |
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0 $0C55 $0C56 wc,3 |
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0 $0CBC $0CBC wc,3 |
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0 $0CBF $0CBF wc,3 |
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0 $0CC6 $0CC6 wc,3 |
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0 $0CCC $0CCD wc,3 |
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0 $0D41 $0D43 wc,3 |
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0 $0D4D $0D4D wc,3 |
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0 $0DCA $0DCA wc,3 |
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0 $0DD2 $0DD4 wc,3 |
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0 $0DD6 $0DD6 wc,3 |
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0 $0E31 $0E31 wc,3 |
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0 $0E34 $0E3A wc,3 |
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0 $0E47 $0E4E wc,3 |
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0 $0EB1 $0EB1 wc,3 |
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0 $0EB4 $0EB9 wc,3 |
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0 $0EBB $0EBC wc,3 |
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0 $0EC8 $0ECD wc,3 |
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0 $0F18 $0F19 wc,3 |
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0 $0F35 $0F35 wc,3 |
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0 $0F37 $0F37 wc,3 |
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0 $0F39 $0F39 wc,3 |
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0 $0F71 $0F7E wc,3 |
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0 $0F80 $0F84 wc,3 |
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0 $0F86 $0F87 wc,3 |
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0 $0F90 $0F97 wc,3 |
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0 $0F99 $0FBC wc,3 |
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0 $0FC6 $0FC6 wc,3 |
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0 $102D $1030 wc,3 |
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0 $1032 $1032 wc,3 |
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0 $1036 $1037 wc,3 |
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0 $1039 $1039 wc,3 |
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0 $1058 $1059 wc,3 |
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1 $0000 $1100 wc,3 |
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2 $1100 $115f wc,3 |
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0 $1160 $11FF wc,3 |
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0 $1712 $1714 wc,3 |
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0 $1732 $1734 wc,3 |
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0 $1752 $1753 wc,3 |
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0 $1772 $1773 wc,3 |
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0 $17B4 $17B5 wc,3 |
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0 $17B7 $17BD wc,3 |
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0 $17C6 $17C6 wc,3 |
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0 $17C9 $17D3 wc,3 |
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0 $17DD $17DD wc,3 |
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0 $180B $180D wc,3 |
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0 $18A9 $18A9 wc,3 |
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0 $1920 $1922 wc,3 |
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0 $1927 $1928 wc,3 |
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0 $1932 $1932 wc,3 |
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0 $1939 $193B wc,3 |
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0 $200B $200F wc,3 |
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0 $202A $202E wc,3 |
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0 $2060 $2063 wc,3 |
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0 $206A $206F wc,3 |
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0 $20D0 $20EA wc,3 |
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2 $2329 $232A wc,3 |
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0 $302A $302F wc,3 |
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2 $2E80 $303E wc,3 |
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0 $3099 $309A wc,3 |
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2 $3040 $A4CF wc,3 |
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2 $AC00 $D7A3 wc,3 |
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2 $F900 $FAFF wc,3 |
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0 $FB1E $FB1E wc,3 |
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0 $FE00 $FE0F wc,3 |
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0 $FE20 $FE23 wc,3 |
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2 $FE30 $FE6F wc,3 |
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0 $FEFF $FEFF wc,3 |
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2 $FF00 $FF60 wc,3 |
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2 $FFE0 $FFE6 wc,3 |
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0 $FFF9 $FFFB wc,3 |
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0 $1D167 $1D169 wc,3 |
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0 $1D173 $1D182 wc,3 |
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0 $1D185 $1D18B wc,3 |
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0 $1D1AA $1D1AD wc,3 |
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2 $20000 $2FFFD wc,3 |
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2 $30000 $3FFFD wc,3 |
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0 $E0001 $E0001 wc,3 |
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0 $E0020 $E007F wc,3 |
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0 $E0100 $E01EF wc,3 |
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here wc-table - Constant #wc-table |
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\ inefficient table walk: |
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: xc-width ( xc -- n ) |
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wc-table #wc-table over + swap ?DO |
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dup I 2@ within IF I 2 cells + @ UNLOOP EXIT THEN |
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3 cells +LOOP 1 ; |
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[ELSE] |
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' wcwidth Alias xc-width |
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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 xc-width + |
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r> I - +LOOP ; |
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: set-encoding-utf-8 ( -- ) |
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['] u8emit is xemit |
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['] u8key is xkey |
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['] u8>> is xchar+ |
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['] u8<< is xchar- |
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[ [IFDEF] xstring+ ] |
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['] u8\string- is xstring- |
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['] +u8/string is +xstring |
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[ [THEN] ] |
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[ [IFDEF] +x/string ] |
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['] u8\string- is x\string- |
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['] +u8/string is +x/string |
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[ [THEN] ] |
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['] u8@ is xc@ |
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['] u8!+? is xc!+? |
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['] u8@+ is xc@+ |
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['] u8len is xc-size |
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[ [IFDEF] x-width ] |
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['] u8width is x-width |
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[ [THEN] ] |
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[ [IFDEF] x-size ] |
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['] u8addrlen is x-size |
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[ [THEN] ] |
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['] -u8trailing-garbage is -trailing-garbage |
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; |
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: utf-8-cold ( -- ) |
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s" LC_ALL" getenv 2dup d0= IF 2drop |
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s" LC_CTYPE" getenv 2dup d0= IF 2drop |
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s" LANG" getenv 2dup d0= IF 2drop |
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s" C" THEN THEN THEN |
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s" UTF-8" search nip nip |
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IF set-encoding-utf-8 ELSE set-encoding-fixed-width THEN ; |
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environment-wordlist set-current |
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: xchar-encoding ( -- addr u ) \ xchar-ext |
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\G Returns a printable ASCII string that reperesents the encoding, |
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\G and use the preferred MIME name (if any) or the name in |
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\G @url{http://www.iana.org/assignments/character-sets} like |
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\G ``ISO-LATIN-1'' or ``UTF-8'', with the exception of ``ASCII'', where |
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\G we prefer the alias ``ASCII''. |
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max-single-byte $80 = IF s" UTF-8" ELSE s" ISO-LATIN-1" THEN ; |
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: max-xchar ( -- xchar ) |
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max-single-byte $80 = IF $7FFFFFFF ELSE $FF THEN ; |
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' noop Alias X:xchar |
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forth definitions |
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:noname ( -- ) |
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defers 'cold |
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utf-8-cold |
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; is 'cold |
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: save-cursor ( -- ) 27 emit '7 emit ; |
utf-8-cold |
: restore-cursor ( -- ) 27 emit '8 emit ; |
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: .rest ( addr pos1 -- addr pos1 ) |
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restore-cursor 2dup type ; |
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: .all ( span addr pos1 -- span addr pos1 ) |
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restore-cursor >r 2dup swap type r> ; |
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: (u8ins) ( max span addr pos1 u8char -- max span addr pos2 ) |
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>r >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 + .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 emit 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 emit 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 .all 2 spaces .rest ; |
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: ?u8del ( max span addr pos1 -- max span addr pos2 0 ) |
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dup IF (u8del) 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) ELSE #bell emit THEN 0 ; |
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: u8eof 2 pick over or 0= IF bye ELSE <u8del> THEN ; |
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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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' (u8ins) IS insert-char |
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' noop 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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