91 lines
3.2 KiB
C++
91 lines
3.2 KiB
C++
/****************************************************************************
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* VCGLib o o *
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* Visual and Computer Graphics Library o o *
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* _ O _ *
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* Copyright(C) 2004 \/)\/ *
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* Visual Computing Lab /\/| *
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* ISTI - Italian National Research Council | *
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* \ *
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* All rights reserved. *
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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 as published by *
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* the Free Software Foundation; either version 2 of the License, or *
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* (at your option) any later version. *
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* *
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* This program is distributed in the hope that it will be useful, *
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* but WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
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* GNU General Public License (http://www.gnu.org/licenses/gpl.txt) *
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* for more details. *
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* *
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****************************************************************************/
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/****************************************************************************
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History
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$Log: not supported by cvs2svn $
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Revision 1.3 2004/07/02 13:08:43 ponchio
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*** empty log message ***
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Revision 1.2 2004/07/01 21:34:29 ponchio
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*** empty log message ***
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Revision 1.1 2004/06/24 14:32:45 ponchio
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Moved from wrap/nexus
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Revision 1.1 2004/06/24 14:18:58 ponchio
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Created
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****************************************************************************/
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#ifndef NXS_MFHASH_H
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#define NXS_MFHASH_H
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#include "vfile.h"
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#include <stdio.h>
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namespace nxs {
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class MFHash {
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public:
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struct Bucket {
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unsigned int key;
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unsigned int value;
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Bucket(): key(0xffffffff) {}
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Bucket(unsigned int k, unsigned int v): key(k), value(v) {}
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bool Empty() { return key == 0xffffffff; }
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};
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MFHash() {}
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bool Create(const std::string &file, unsigned int reserved = 32);
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bool Load(const std::string &file, unsigned int used = 0xffffffff);
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void Resize(unsigned int n);
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void Insert(unsigned int key, unsigned int value, bool rehash = true);
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template <class C> void GetValues(unsigned int key, C &container) {
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container.clear();
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unsigned int hash_size = buffer.Size();
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unsigned int j = key % hash_size;
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while(!buffer[j].Empty()) {
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if(buffer[j].key == key) {
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//container.push_back(buffer[j].value);
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container.insert(buffer[j].value);
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}
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j++;
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if(j >= hash_size) j = 0;
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}
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}
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unsigned int Count(unsigned int key);
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void Clear();
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unsigned int Size();
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void Close();
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VFile<Bucket> buffer;
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unsigned int space;
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};
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}//namespace
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#endif
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