153 lines
4.0 KiB
Factor
Executable File
153 lines
4.0 KiB
Factor
Executable File
USING: sequences namespaces unicode.data kernel math arrays
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locals sorting.insertion ;
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IN: unicode.normalize
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! Conjoining Jamo behavior
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: hangul-base HEX: ac00 ; inline
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: hangul-end HEX: D7AF ; inline
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: initial-base HEX: 1100 ; inline
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: medial-base HEX: 1161 ; inline
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: final-base HEX: 11a7 ; inline
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: initial-count 19 ; inline
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: medial-count 21 ; inline
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: final-count 28 ; inline
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: hangul? ( ch -- ? ) hangul-base hangul-end ?between? ;
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: jamo? ( ch -- ? ) HEX: 1100 HEX: 11FF ?between? ;
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! These numbers come from UAX 29
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: initial? ( ch -- ? )
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dup HEX: 1100 HEX: 1159 ?between? [ ] [ HEX: 115F = ] ?if ;
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: medial? ( ch -- ? ) HEX: 1160 HEX: 11A2 ?between? ;
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: final? ( ch -- ? ) HEX: 11A8 HEX: 11F9 ?between? ;
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: hangul>jamo ( hangul -- jamo-string )
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hangul-base - final-count /mod final-base +
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>r medial-count /mod medial-base +
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>r initial-base + r> r>
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dup final-base = [ drop 2array ] [ 3array ] if ;
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: jamo>hangul ( initial medial final -- hangul )
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>r >r initial-base - medial-count *
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r> medial-base - + final-count *
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r> final-base - + hangul-base + ;
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! Normalization -- Decomposition
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: reorder-slice ( string start -- slice done? )
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2dup swap [ non-starter? not ] find-from drop
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[ [ over length ] unless* rot <slice> ] keep not ;
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: reorder-next ( string i -- new-i done? )
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over [ non-starter? ] find-from drop [
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reorder-slice
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>r dup [ combining-class ] insertion-sort slice-to r>
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] [ length t ] if* ;
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: reorder-loop ( string start -- )
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dupd reorder-next [ 2drop ] [ reorder-loop ] if ;
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: reorder ( string -- )
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0 reorder-loop ;
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: reorder-back ( string i -- )
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over [ non-starter? not ] find-last-from drop ?1+ reorder-next 2drop ;
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:: decompose ( string quot -- decomposed )
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! When there are 8 and 32-bit strings, this'll be
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! equivalent to clone on 8 and the contents of the last
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! main quotation on 32.
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string [ 127 < ] all? [ string ] [
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[
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string [
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dup hangul? [ hangul>jamo % ]
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[ dup quot call [ % ] [ , ] ?if ] if
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] each
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] "" make
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dup reorder
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] if ; inline
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: nfd ( string -- string )
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[ canonical-entry ] decompose ;
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: nfkd ( string -- string )
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[ compatibility-entry ] decompose ;
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: string-append ( s1 s2 -- string )
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! This could be more optimized,
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! but in practice, it'll almost always just be append
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[ append ] keep
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0 over ?nth non-starter?
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[ length dupd reorder-back ] [ drop ] if ;
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! Normalization -- Composition
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SYMBOL: main-str
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SYMBOL: ind
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SYMBOL: after
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SYMBOL: char
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: get-str ( i -- ch ) ind get + main-str get ?nth ;
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: current ( -- ch ) 0 get-str ;
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: to ( -- ) ind inc ;
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: initial-medial? ( -- ? )
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current initial? [ 1 get-str medial? ] [ f ] if ;
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: --final? ( -- ? )
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2 get-str final? ;
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: imf, ( -- )
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current to current to current jamo>hangul , ;
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: im, ( -- )
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current to current 0 jamo>hangul , ;
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: compose-jamo ( -- )
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initial-medial? [
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--final? [ imf, ] [ im, ] if
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] when to current jamo? [ compose-jamo ] when ;
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: pass-combining ( -- )
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current non-starter? [ current , to pass-combining ] when ;
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: try-compose ( last-class char current-class -- )
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swapd = [ after get push ] [
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char get over combine-chars
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[ nip char set ] [ after get push ] if*
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] if ;
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: compose-iter ( n -- )
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current [
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dup combining-class dup
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[ [ try-compose ] keep to compose-iter ] [ 3drop ] if
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] [ drop ] if* ;
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: ?new-after ( -- )
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after [ dup empty? [ drop SBUF" " clone ] unless ] change ;
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: (compose) ( -- )
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current [
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dup jamo? [ drop compose-jamo ] [
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char set to ?new-after
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0 compose-iter
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char get , after get %
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to
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] if (compose)
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] when* ;
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: compose ( str -- comp )
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[
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main-str set
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0 ind set
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SBUF" " clone after set
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pass-combining (compose)
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] "" make ;
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: nfc ( string -- nfc )
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nfd compose ;
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: nfkc ( string -- nfkc )
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nfkc compose ;
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