version 1.26, 2007/05/05 17:26:02
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version 1.34, 2007/12/31 18:40:24
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\ UTF-8 handling 12dec04py |
\ UTF-8 handling 12dec04py |
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\ Copyright (C) 2004,2005,2006 Free Software Foundation, Inc. |
\ Copyright (C) 2004,2005,2006,2007 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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Line 71 $80 Value max-single-byte
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Line 70 $80 Value max-single-byte
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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 max-single-byte u< ?EXIT \ special case ASCII |
defers key dup max-single-byte u< ?EXIT \ special case ASCII |
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dup $FF = ?EXIT \ special resize character |
dup $C2 u< IF UTF-8-err throw THEN \ malformed character |
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 |
Line 91 $80 Value max-single-byte
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Line 93 $80 Value max-single-byte
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\ utf-8 stuff for xchars |
\ utf-8 stuff for xchars |
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: u8string+ ( xcaddr u -- xcaddr u' ) |
: +u8/string ( xc-addr1 u1 -- xc-addr2 u2 ) |
over + u8>> over - ; |
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: u8string- ( xcaddr u -- xcaddr u' ) |
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over + u8<< over - ; |
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: +u8string ( xc-addr1 u1 -- xc-addr2 u2 ) |
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over dup u8>> swap - /string ; |
over dup u8>> swap - /string ; |
: -u8string ( xc-addr1 u1 -- xc-addr2 u2 ) |
: u8\string- ( xcaddr u -- xcaddr u' ) |
over dup u8<< swap - /string ; |
over + u8<< over - ; |
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: u8@ ( c-addr -- u ) |
: u8@ ( c-addr -- u ) |
u8@+ nip ; |
u8@+ nip ; |
Line 112 $80 Value max-single-byte
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Line 109 $80 Value max-single-byte
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>r u8!+ r> r> swap - true |
>r u8!+ r> r> swap - true |
then ; |
then ; |
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: u8addrlen ( u8-addr -- u ) |
: u8addrlen ( u8-addr u -- u ) drop |
\ length of UTF-8 char starting at u8-addr (accesses only u8-addr) |
\ length of UTF-8 char starting at u8-addr (accesses only u8-addr) |
c@ |
c@ |
dup $80 u< if drop 1 exit endif |
dup $80 u< if drop 1 exit endif |
Line 126 $80 Value max-single-byte
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Line 123 $80 Value max-single-byte
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: -u8trailing-garbage ( addr u1 -- addr u2 ) |
: -u8trailing-garbage ( addr u1 -- addr u2 ) |
2dup + dup u8<< ( addr u1 end1 end2 ) |
2dup + dup u8<< ( addr u1 end1 end2 ) |
2dup dup u8addrlen + = if \ last character ok |
2dup dup over over - u8addrlen + = if \ last character ok |
2drop |
2drop |
else |
else |
nip nip over - |
nip nip over - |
Line 292 here wc-table - Constant #wc-table
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Line 289 here wc-table - Constant #wc-table
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['] u8>> is xchar+ |
['] u8>> is xchar+ |
['] u8<< is xchar- |
['] u8<< is xchar- |
[ [IFDEF] xstring+ ] |
[ [IFDEF] xstring+ ] |
['] u8string+ is xstring+ |
['] u8\string- is xstring- |
['] u8string- is xstring- |
['] +u8/string is +xstring |
['] +u8string is +xstring |
[ [THEN] ] |
['] -u8string is -xstring |
[ [IFDEF] +x/string ] |
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['] u8\string- is x\string- |
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['] +u8/string is +x/string |
[ [THEN] ] |
[ [THEN] ] |
['] u8@ is xc@ |
['] u8@ is xc@ |
['] u8!+? is xc!+? |
['] u8!+? is xc!+? |
Line 304 here wc-table - Constant #wc-table
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Line 303 here wc-table - Constant #wc-table
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[ [IFDEF] x-width ] |
[ [IFDEF] x-width ] |
['] u8width is x-width |
['] u8width is x-width |
[ [THEN] ] |
[ [THEN] ] |
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[ [IFDEF] x-size ] |
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['] u8addrlen is x-size |
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[ [THEN] ] |
['] -u8trailing-garbage is -trailing-garbage |
['] -u8trailing-garbage is -trailing-garbage |
; |
; |
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Line 315 here wc-table - Constant #wc-table
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Line 317 here wc-table - Constant #wc-table
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s" UTF-8" search nip nip |
s" UTF-8" search nip nip |
IF set-encoding-utf-8 ELSE set-encoding-fixed-width THEN ; |
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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forth definitions |
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:noname ( -- ) |
:noname ( -- ) |
defers 'cold |
defers 'cold |
utf-8-cold |
utf-8-cold |