60 lines
1.3 KiB
Factor
60 lines
1.3 KiB
Factor
! Copyright (C) 2003, 2008 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: accessors kernel math.private sequences kernel.private
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math sequences.private slots.private alien.accessors ;
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IN: strings
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<PRIVATE
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: string-hashcode ( str -- n ) 3 slot ; inline
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: set-string-hashcode ( n str -- ) 3 set-slot ; inline
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: reset-string-hashcode ( str -- )
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f swap set-string-hashcode ; inline
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: rehash-string ( str -- )
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1 over sequence-hashcode swap set-string-hashcode ; inline
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: set-string-nth ( ch n string -- )
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pick HEX: 7f fixnum<=
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[ set-string-nth-fast ] [ set-string-nth-slow ] if ; inline
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PRIVATE>
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M: string equal?
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over string? [
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2dup [ hashcode ] bi@ eq?
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[ sequence= ] [ 2drop f ] if
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] [
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2drop f
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] if ;
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M: string hashcode*
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nip
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dup string-hashcode
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[ ] [ dup rehash-string string-hashcode ] ?if ;
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M: string length
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length>> ; inline
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M: string nth-unsafe
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[ >fixnum ] dip string-nth ; inline
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M: string set-nth-unsafe
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dup reset-string-hashcode
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[ >fixnum ] [ >fixnum ] [ ] tri* set-string-nth ; inline
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M: string clone
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(clone) [ clone ] change-aux ; inline
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M: string resize resize-string ; inline
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: 1string ( ch -- str ) 1 swap <string> ;
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: >string ( seq -- str ) "" clone-like ;
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M: string new-sequence drop 0 <string> ; inline
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INSTANCE: string sequence
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