72 lines
2.5 KiB
Standard ML
72 lines
2.5 KiB
Standard ML
(*****************************************************************************
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* su4sml --- an SML repository for managing (Secure)UML/OCL models
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* http://projects.brucker.ch/su4sml/
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*
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* HashTable.sml ---
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* This file is part of su4sml.
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*
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* Copyright (c) 2005-2007, ETH Zurich, Switzerland
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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 are
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* met:
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*
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* * 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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*
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* * Neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* 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
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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******************************************************************************)
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(* $Id$ *)
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structure HashString =
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struct
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fun hashString _ = ()
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end
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structure HashTable =
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struct
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datatype ('a, 'b) hash_table = HT of {
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eq_pred : ('a * 'a) -> bool,
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not_found : exn,
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table: (('a*'b) list) ref
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}
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fun mkTable (_, eq) (_, notFound) = HT{
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eq_pred = eq,
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not_found = notFound,
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table = ref ([])
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}
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fun find (HT{table,...}) key =
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Option.map (fn (a,b) => b) ((List.find (fn (x,y) => x =key) (!table)))
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fun insert (HT{table,...}) (k,v) = (table:=([(k,v)]@ (!(table))))
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end
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