+
+CATEGORY: blank Zs Zl Zp | "\r\n\t" member? ;
+
+CATEGORY: letter Ll | "Other_Lowercase" property? ;
+
+CATEGORY: LETTER Lu | "Other_Uppercase" property? ;
+
+CATEGORY: Letter Lu Ll Lt Lm Lo Nl ;
+
+CATEGORY: digit Nd Nl No ;
+
+CATEGORY-NOT: printable Cc Cf Cs Co Cn ;
+
+CATEGORY: alpha Lu Ll Lt Lm Lo Nd Nl No | "Other_Alphabetic" property? ;
+
+CATEGORY: control Cc ;
+
+CATEGORY-NOT: uncased Lu Ll Lt Lm Mn Me ;
+
+CATEGORY-NOT: character Cn ;
+
+CATEGORY: math Sm | "Other_Math" property? ;
+
+: script-of ( char -- script )
+ script-table interval-at ;
+
+: name>char ( name -- char ) name-map at ; inline
+
+: char>name ( char -- name ) name-map value-at ; inline
+
+: ch>lower ( ch -- lower ) simple-lower ?at drop ; inline
+
+: ch>upper ( ch -- upper ) simple-upper ?at drop ; inline
+
+: ch>title ( ch -- title ) simple-title ?at drop ; inline
+
+: first-grapheme ( str -- i )
+ unclip-slice grapheme-class over
+ [ grapheme-class [ nip ] [ grapheme-break? ] 2bi ] find drop
+ nip swap length or 1 + ;
+
+: first-grapheme-from ( start str -- i )
+ over tail-slice first-grapheme + ;
+
+: last-grapheme ( str -- i )
+ unclip-last-slice grapheme-class swap
+ [ grapheme-class dup rot grapheme-break? ] find-last drop ?1+ nip ;
+
+: last-grapheme-from ( end str -- i )
+ swap head-slice last-grapheme ;
+
+<PRIVATE
+
+: >pieces ( str quot: ( str -- i ) -- graphemes )
+ [ dup empty? not ] swap '[ dup @ cut-slice swap ] produce nip ; inline
+
+PRIVATE>
+
+: >graphemes ( str -- graphemes )
+ [ first-grapheme ] >pieces ;
+
+: string-reverse ( str -- rts )
+ >graphemes reverse! concat ;
+
+: first-word ( str -- i )
+ [ [ length ] [ first word-break-prop ] bi ] keep
+ 1 swap dup '[ _ word-break-next ] find-index-from
+ drop nip swap or ;
+
+: >words ( str -- words )
+ [ first-word ] >pieces ;
+
+<PRIVATE
+
+: nth-next ( i str -- str[i-1] str[i] )
+ [ [ 1 - ] keep ] dip '[ _ nth ] bi@ ;
+
+PRIVATE>
+
+: word-break-at? ( i str -- ? )
+ {
+ [ drop zero? ]
+ [ length = ]
+ [
+ [ nth-next [ word-break-prop ] dip ] 2keep
+ word-break-next nip
+ ]
+ } 2|| ;
+
+: first-word-from ( start str -- i )
+ over tail-slice first-word + ;
+
+: last-word ( str -- i )
+ [ length iota ] keep '[ _ word-break-at? ] find-last drop 0 or ;
+
+: last-word-from ( end str -- i )
+ swap head-slice last-word ;
+
+: >lower ( string -- lower )
+ locale>lower final-sigma
+ [ lower>> ] [ ch>lower ] map-case ;
+
+HINTS: >lower string ;
+
+: >upper ( string -- upper )
+ locale>upper
+ [ upper>> ] [ ch>upper ] map-case ;
+
+HINTS: >upper string ;
+
+<PRIVATE
+
+: (>title) ( string -- title )
+ locale>upper
+ [ title>> ] [ ch>title ] map-case ; inline
+
+PRIVATE>
+
+: capitalize ( string -- title )
+ unclip-slice 1string [ >lower ] [ (>title) ] bi*
+ "" prepend-as ; inline
+
+: >title ( string -- title )
+ final-sigma >words [ capitalize ] map! concat ;
+
+HINTS: >title string ;
+
+: >case-fold ( string -- fold )
+ >upper >lower ;
+
+: lower? ( string -- ? ) dup >lower = ;
+
+: upper? ( string -- ? ) dup >upper = ;
+
+: title? ( string -- ? ) dup >title = ;
+
+: case-fold? ( string -- ? ) dup >case-fold = ;
+
+: nfd ( string -- nfd )
+ [ (nfd) ] with-string ;
+
+: nfkd ( string -- nfkd )
+ [ (nfkd) ] with-string ;
+
+: string-append ( s1 s2 -- string )
+ [ append ] keep
+ 0 over ?nth non-starter?
+ [ length dupd reorder-back ] [ drop ] if ;
+
+HINTS: string-append string string ;
+
+: nfc ( string -- nfc )
+ [ (nfd) combine ] with-string ;
+
+: nfkc ( string -- nfkc )
+ [ (nfkd) combine ] with-string ;
+
+: collation-key ( string -- key )
+ nfd string>graphemes graphemes>weights
+ filter-ignorable weights>bytes ;
+
+<PRIVATE
+
+: insensitive= ( str1 str2 levels-removed -- ? )
+ [
+ [ collation-key ] dip
+ [ [ 0 = not ] trim-tail but-last ] times
+ ] curry same? ;
+
+PRIVATE>
+
+: primary= ( str1 str2 -- ? )
+ 3 insensitive= ;
+
+: secondary= ( str1 str2 -- ? )
+ 2 insensitive= ;
+
+: tertiary= ( str1 str2 -- ? )
+ 1 insensitive= ;
+
+: quaternary= ( str1 str2 -- ? )
+ 0 insensitive= ;
+
+: w/collation-key ( str -- {str,key} )
+ [ collation-key ] keep 2array ;
+
+: sort-strings ( strings -- sorted )
+ [ w/collation-key ] map natural-sort values ;
+
+: string<=> ( str1 str2 -- <=> )
+ [ w/collation-key ] compare ;
projects / factor.git / commitdiff