62 lines
2.6 KiB
Scheme
62 lines
2.6 KiB
Scheme
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;;; Snow-repository.scm - Snow implementation
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;;;
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;;; Copyright (c) 2012 Johan Ceuppens
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;;;
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;;; All rights reserved.
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;;;
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;;; Redistribution and use in source and binary forms, with or without
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;;; modification, are permitted provided that the following conditions
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;;; are met:
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;;; 1. Redistributions of source code must retain the above copyright
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;;; notice, this list of conditions and the following disclaimer.
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;;; 2. Redistributions in binary form must reproduce the above copyright
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;;; notice, this list of conditions and the following disclaimer in the
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;;; documentation and/or other materials provided with the distribution.
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;;; 3. The name of the authors may not be used to endorse or promote products
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;;; derived from this software without specific prior written permission.
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;;;
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;;; THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
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;;; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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;;; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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;;; IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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;;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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;;; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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;;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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;;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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;;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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;;; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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(define (parse-for s index)
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(let ((word "("))
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(do ((i index (+ i 1)))
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((cond ((string=? s word)
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;;(set! index i))
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i)
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((eq? (string-ref s i) #\newline)
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#t));;(string-set! s i ""
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(set! word (string-append word (string (string-ref s i))))))))
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(define (parse-for-url s index)
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(let ((word "")
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(index (+ index 1)))
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(if (eq? (string-ref s (- index 1))
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#\")
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(do ((i index (+ i 1)))
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((eq? (string-ref s i) #\")
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(string-append s (string #\")))
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(set! word (string-append word (string (string-ref s i)))))
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(error "parse-for-url : malformed url string"))))
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(define (snow-repository db)
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(let ((index 0)
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(db db))
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(cond ((let ((index2 (parse-for "repository" index)))
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(cond ((let ((index3 (parse-for "package" index2))))
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(cond ((let ((index4 (parse-for "url" index3))))
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((cond (let ((url parse-for-url index4))))
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(set! db (append db (cons "url" url)
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))))))))))))
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