89 lines
2.7 KiB
Scheme
Executable File
89 lines
2.7 KiB
Scheme
Executable File
;;; Ikarus Scheme -- A compiler for R6RS Scheme.
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;;; Copyright (C) 2006,2007 Abdulaziz Ghuloum
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;;;
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;;; This program is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License version 3 as
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;;; published by the Free Software Foundation.
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;;;
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;;; This program is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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;;; General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with this program. If not, see <http://www.gnu.org/licenses/>.
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(library (unicode-data)
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(export get-unicode-data)
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(import (ikarus))
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(define (read-line)
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(let f ([ac '()])
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(let ([x (read-char)])
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(cond
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[(eof-object? x)
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(if (null? ac)
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(eof-object)
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(list->string (reverse ac)))]
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[(char=? x #\newline)
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(if (null? ac) (f '()) (list->string (reverse ac)))]
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[else (f (cons x ac))]))))
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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 (add1 i) n)]
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[else i]))]
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[hi
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(let f ([i (sub1 (string-length str))])
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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 (sub1 i))]
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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 (read-line)])
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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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