26 lines
881 B
Scheme
26 lines
881 B
Scheme
;; Copyright (c) 2009 Derick Eddington. All rights reserved.
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;; Licensed under an MIT-style license. My license is in the file
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;; named LICENSE from the original collection this file is distributed
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;; with. If this file is redistributed with some other collection, my
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;; license must also be included.
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#!r6rs
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(library (srfi private OS-id-features)
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(export
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OS-id-features)
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(import
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(rnrs))
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(define (OS-id-features OS-id features-alist)
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(define OS-id-len (string-length OS-id))
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(define (OS-id-contains? str)
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(define str-len (string-length str))
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(let loop ((i 0))
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(and (<= (+ i str-len) OS-id-len)
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(or (string-ci=? str (substring OS-id i (+ i str-len)))
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(loop (+ 1 i))))))
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(apply append
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(map cdr (filter (lambda (x) (OS-id-contains? (car x)))
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features-alist))))
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)
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