78 lines
2.8 KiB
Scheme
78 lines
2.8 KiB
Scheme
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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 HASHTABLESIZE 1000000)
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(define (make-hash-table n)
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(let ((*symtab (make-vector 1000000)))
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*symtab))
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(define url-ascii-vector
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(vector #\A #\B #\C #\D #\E #\F #\G #\H #\I #\J #\K #\L
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#\M #\N #\O #\P #\R #\S #\T #\U #\V #\W #\X #\Y
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#\Z
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#\a #\b #\c #\d #\e #\f #\g #\h #\i #\j #\k #\l
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#\m #\n #\o #\p #\r #\s #\t #\u #\v #\w #\x #\y
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#\z
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#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9))
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(define (hash-explode str)
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(let ((ret (make-vector (string-length str))))
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(do ((i 0 (+ i 1)))
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((>= i (string-length str))
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#t)
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(vector-set! ret i (string-ref str i))
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)
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ret))
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(define (hash-f key)
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(let ((keyexplosionvec (hash-explode key))
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(sum 0))
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(do ((i 0 (+ i 1)))
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((>= i (vector-length keyexplosionvec))
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(display "Unknown/Known KEY char"))
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(do ((j 0 (+ j 1)))
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((cond ((>= j (vector-length url-ascii-vector))
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#t)
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((eq? (vector-ref keyexplosionvec i)
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(vector-ref url-ascii-vector j))
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(set! sum (+ sum j)));;FIXME *
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))
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))
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sum))
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(define (hash-ref table key)
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(vector-ref table (hash-f key)))
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(define (hash-set! table key value)
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(vector-set! table (hash-f key) value))
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;; test
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;;(define ht (make-hash-table HASHTABLESIZE))
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;;(hash-set! ht "abc" 22)
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;;(display (hash-ref ht "abc"))
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