80 lines
3.0 KiB
Scheme
80 lines
3.0 KiB
Scheme
;;; 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 needle index)
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(let ((word "("))
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(do ((i index (+ i 1)))
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((cond ((string=? needle word)
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;;(set! index i))
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i)
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((eq? (string-ref s i) #\space)
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(set! word ""))
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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 (read-in-file-contents filename)
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(let ((contents ""))
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(do ((s (read-char)(read-char)))
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((eof-object? s)
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contents)
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(set! contents (append contents (string s))))))
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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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i)
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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 filename db)
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(let ((urlstr "")
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(db db)
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(contents (read-in-file-contents filename))
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(index4 0)
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(index3 0)
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(index2 0)
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(index 0))
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(set! index2 (parse-for contents "repository" index))
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(set! index3 (parse-for contents "package" index))
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(set! index4 (parse-for contents "url" index))
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(set! urlstr (parse-for-url contents index4))
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(set! db (append db (list (list "url" urlstr))))
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db))
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