/usr/lib/s9fes/string-find-last.scm is in scheme9 2010.11.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 42 | ; 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-last string1 string2) ==> string | #f
; (string-ci-find-last string1 string2) ==> string | #f
; (string-find-last-word string1 string2) ==> string | #f
; (string-ci-find-last-word string1 string2) ==> string | #f
;
; (load-from-library "string-find-last.scm")
;
; Find the last occurrence of a small string STRING1 in a large
; string STRING2. Return the last substring of STRING2 beginning
; with STRING1. When STRING2 does not contain STRING1, return #F.
; STRING-CI-FIND-LAST performs the same function, but ignores case.
;
; STRING-FIND-LAST-WORD (STRING-CI-FIND-LAST-WORD) differs from
; STRING-FIND-LAST (STRING-CI-FIND-LAST) 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-last "a" "aaaaa") ==> "a"
; (string-ci-find-last "A" "ab ac") ==> "ac"
; (string-find-last "ax" "ab ac") ==> #f
; (string-find-last-word "a" "ab a c") ==> "a c"
; (string-find-last-word "a" "ab ac") ==> #f
(load-from-library "string-last-position.scm")
(define (make-str-pos pos)
(lambda (u s)
(let ((i (pos u s)))
(and i (substring s i (string-length s))))))
(define string-find-last (make-str-pos string-last-position))
(define string-ci-find-last (make-str-pos string-ci-last-position))
(define string-find-last-word (make-str-pos string-last-word-position))
(define string-ci-find-last-word (make-str-pos string-ci-last-word-position))
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