80 lines
2.8 KiB
Scheme
80 lines
2.8 KiB
Scheme
;;; Ikarus Scheme -- A compiler for R6RS Scheme.
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;;; Copyright (C) 2006,2007,2008 Abdulaziz Ghuloum
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;;; Permission is hereby granted, free of charge, to any person obtaining a
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;;; copy of this software and associated documentation files (the "Software"),
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;;; to deal in the Software without restriction, including without limitation
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;;; the rights to use, copy, modify, merge, publish, distribute, sublicense,
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;;; and/or sell copies of the Software, and to permit persons to whom the
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;;; Software is furnished to do so, subject to the following conditions:
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;;;
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;;; The above copyright notice and this permission notice shall be included in
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;;; all copies or substantial portions of the Software.
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;;;
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;;; THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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;;; IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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;;; FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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;;; THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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;;; LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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;;; FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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;;; DEALINGS IN THE SOFTWARE.
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(library (unicode-data)
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(export get-unicode-data)
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(import (rnrs))
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(define (find-semi/hash str i n)
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(cond
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[(or (fx=? i n) (memv (string-ref str i) '(#\; #\#))) i]
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[else (find-semi/hash str (+ i 1) n)]))
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(define (cleanup str)
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(let ([lo
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(let f ([i 0] [n (string-length str)])
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(cond
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[(= i n) n]
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[(char=? #\space (string-ref str i))
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(f (+ i 1) n)]
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[else i]))]
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[hi
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(let f ([i (- (string-length str) 1)])
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(cond
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[(< i 0) i]
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[(char=? #\space (string-ref str i))
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(f (- i 1))]
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[else (+ i 1)]))])
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(if (> hi lo)
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(substring str lo hi)
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"")))
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(define (split str)
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(let f ([i 0] [n (string-length str)])
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(cond
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[(or (= i n) (memv (string-ref str i) '(#\#)))
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'("")]
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[else
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(let ([j (find-semi/hash str i n)])
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(cond
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[(or (= j n) (memv (string-ref str i) '(#\#)))
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(list (cleanup (substring str i j)))]
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[else
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(cons (cleanup (substring str i j))
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(f (+ j 1) n))]))])))
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(define (extract-uni-data)
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(let f ([ls '()])
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(let ([line (get-line (current-input-port))])
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(cond
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[(eof-object? line)
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(reverse ls)]
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[else
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(let ([fields (split line)])
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(if (or (null? fields) (equal? fields '("")))
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(f ls)
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(f (cons fields ls))))]))))
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(define (get-unicode-data filename)
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(with-input-from-file
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filename
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extract-uni-data)))
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