89 lines
2.8 KiB
C++
89 lines
2.8 KiB
C++
/*
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* CDE - Common Desktop Environment
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*
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* Copyright (c) 1993-2012, The Open Group. All rights reserved.
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*
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* These libraries and programs are free software; you can
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* redistribute them and/or modify them under the terms of the GNU
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* Lesser General Public License as published by the Free Software
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* Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* These libraries and programs are distributed in the hope that
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* they will be useful, but WITHOUT ANY WARRANTY; without even the
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* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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* PURPOSE. See the GNU Lesser General Public License for more
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* details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with these libraries and programs; if not, write
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* to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
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* Floor, Boston, MA 02110-1301 USA
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*/
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/*
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* $XConsortium: atoi_pearson.h /main/3 1996/06/11 17:35:50 cde-hal $
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*
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* Copyright (c) 1992 HaL Computer Systems, Inc. All rights reserved.
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* UNPUBLISHED -- rights reserved under the Copyright Laws of the United
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* States. Use of a copyright notice is precautionary only and does not
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* imply publication or disclosure.
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*
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* This software contains confidential information and trade secrets of HaL
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* Computer Systems, Inc. Use, disclosure, or reproduction is prohibited
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* without the prior express written permission of HaL Computer Systems, Inc.
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*
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* RESTRICTED RIGHTS LEGEND
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* Use, duplication, or disclosure by the Government is subject to
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* restrictions as set forth in subparagraph (c)(l)(ii) of the Rights in
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* Technical Data and Computer Software clause at DFARS 252.227-7013.
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* HaL Computer Systems, Inc.
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* 1315 Dell Avenue, Campbell, CA 95008
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*
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*/
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#ifndef _atoi_pearson_h
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#define _atoi_pearson_h 1
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#include "utility/funcs.h"
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#include "utility/pm_random.h"
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#include "utility/key.h"
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// Based on Pearson's algorithm presented in CACM 90/6.
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// rewritten to speed up atoi()
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class atoi_pearson
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{
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public:
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atoi_pearson(int _range, int _entries) ;
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atoi_pearson(int _range, int _entries, pm_random&) ;
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atoi_pearson(int _range, int _entries, char* v_tbl) ;
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virtual ~atoi_pearson() ;
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virtual int atoi(const key_type& k, int offset = 0) const ;
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int atoi(const char* str, int _offset = 0, int range = 0) const ;
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int atoi(const char* str, int sz, int _offset = 0, int range = 0) const ;
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int size() { return v_entries; } ;
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char* tblPtr() { return v_tbl; } ;
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friend ostream& operator<<(ostream&, atoi_pearson&);
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private:
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void init(int _range, int _entries, pm_random&);
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protected:
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unsigned int v_entries;
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unsigned int v_range;
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unsigned v_mask;
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unsigned int v_no_bytes;
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char *v_tbl;
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Boolean v_shared;
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};
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#endif
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