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; Scheme 9 from Empty Space, Function Library
; By Nils M Holm, 2009,2010
; Placed in the Public Domain
;
; (string-upcase string) ==> string
; (string-downcase string) ==> string
;
; (load-from-library "string-case.scm")
;
; Return a fresh string containing the characters of STRING, but
; with the case of alphabetic characters converted. STRING-UPCASE
; converts characters to upper case, STRING-DOWNCASE to lower case.
;
; Example: (string-upcase "Hello, World!") ==> "HELLO, WORLD!"
; (string-downcase "Hello, World!") ==> "hello, world!"
(load-from-library "string-map.scm")
(define (string-downcase s)
(string-map char-downcase s))
(define (string-upcase s)
(string-map char-upcase s))
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