version 1.7, 2004/12/28 21:09:47
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version 1.13, 2005/01/05 22:13:40
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Line 22
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Line 22
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s" malformed UTF-8 character" exception Constant UTF-8-err |
s" malformed UTF-8 character" exception Constant UTF-8-err |
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$80 Value max-single-byte |
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: u8len ( u8 -- n ) |
: u8len ( u8 -- n ) |
dup $80 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 REPEAT |
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 |
$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 38 s" malformed UTF-8 character" exception
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Line 40 s" malformed UTF-8 character" exception
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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 'ç' 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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: 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 |
$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 64 s" malformed UTF-8 character" exception
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Line 80 s" malformed UTF-8 character" exception
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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 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 ; |
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\ utf-8 stuff for xchars |
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: +u8/string ( c-addr1 u1 -- c-addr2 u2 ) |
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over dup u8>> swap - /string ; |
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: -u8/string ( c-addr1 u1 -- c-addr2 u2 ) |
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over dup u8<< swap - /string ; |
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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 ) |
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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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UTF-8-err throw ; |
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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 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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: 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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['] +u8/string is +x/string |
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['] -u8/string is -x/string |
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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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['] -u8trailing-garbage is -trailing-garbage |
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; |
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\ input editor |
\ input editor |
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[IFUNDEF] #esc 27 Constant #esc [THEN] |
[IFUNDEF] #esc 27 Constant #esc [THEN] |