/usr/lib/s9fes/string-find.scm is in scheme9 2010.11.13-2.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 | ; Scheme 9 from Empty Space, Function Library
; By Nils M Holm, 2009,2010
; See the LICENSE file of the S9fES package for terms of use
;
; (string-find string1 string2) ==> string | #f
; (string-ci-find string1 string2) ==> string | #f
; (string-find-word string1 string2) ==> string | #f
; (string-ci-find-word string1 string2) ==> string | #f
;
; (load-from-library "string-find.scm")
;
; Find the first occurrence of a small string STRING1 in a large
; string STRING2. Return the first substring of STRING2 beginning
; with STRING1. When STRING2 does not contain STRING1, return #F.
; STRING-CI-FIND performs the same function, but ignores case.
;
; STRING-FIND-WORD (STRING-CI-FIND-WORD) differs from STRING-FIND
; (STRING-CI-FIND) in that is matches only full words, where a full
; word is a subsequence of characters that is delimited on both
; sides by one of the following:
;
; - the beginning of the string;
; - the end of the string;
; - a non-alphabetic character.
;
; Example: (string-find "ein" "gemeinsam") ==> "einsam"
; (string-find "people" "democracy") ==> #f
; (string-find-word "me" "test me") ==> "me"
; (string-find-word "me" "testme") ==> #f
(load-from-library "string-position.scm")
(define (make-find pos)
(lambda (u s)
(let ((i (pos u s)))
(and i (substring s i (string-length s))))))
(define string-find (make-find string-position))
(define string-ci-find (make-find string-ci-position))
(define string-find-word (make-find string-word-position))
(define string-ci-find-word (make-find string-ci-word-position))
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