24 lines
1.1 KiB
Factor
24 lines
1.1 KiB
Factor
! Copyright (C) 2005, 2009 Slava Pestov.
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel math math.order sequences strings
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combinators.short-circuit hints ;
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IN: ascii
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: ascii? ( ch -- ? ) 0 127 between? ; inline
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: blank? ( ch -- ? ) " \t\n\r" member? ; inline
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: letter? ( ch -- ? ) CHAR: a CHAR: z between? ; inline
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: LETTER? ( ch -- ? ) CHAR: A CHAR: Z between? ; inline
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: digit? ( ch -- ? ) CHAR: 0 CHAR: 9 between? ; inline
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: printable? ( ch -- ? ) CHAR: \s CHAR: ~ between? ; inline
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: control? ( ch -- ? ) { [ 0 HEX: 1F between? ] [ HEX: 7F = ] } 1|| ; inline
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: quotable? ( ch -- ? ) { [ printable? ] [ "\"\\" member? not ] } 1&& ; inline
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: Letter? ( ch -- ? ) { [ letter? ] [ LETTER? ] } 1|| ; inline
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: alpha? ( ch -- ? ) { [ Letter? ] [ digit? ] } 1|| ; inline
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: ch>lower ( ch -- lower ) dup LETTER? [ HEX: 20 + ] when ; inline
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: >lower ( str -- lower ) [ ch>lower ] map ;
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: ch>upper ( ch -- upper ) dup letter? [ HEX: 20 - ] when ; inline
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: >upper ( str -- upper ) [ ch>upper ] map ;
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HINTS: >lower string ;
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HINTS: >upper string ;
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