104 lines
2.9 KiB
C
104 lines
2.9 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: params.cc /main/4 1996/07/18 14:33:30 drk $
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*
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* Copyright (c) 1993 HAL Computer Systems International, Ltd.
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* All rights reserved. Unpublished -- rights reserved under
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* the Copyright Laws of the United States. USE OF A COPYRIGHT
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* NOTICE IS PRECAUTIONARY ONLY AND DOES NOT IMPLY PUBLICATION
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* OR DISCLOSURE.
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*
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* THIS SOFTWARE CONTAINS CONFIDENTIAL INFORMATION AND TRADE
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* SECRETS OF HAL COMPUTER SYSTEMS INTERNATIONAL, LTD. USE,
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* DISCLOSURE, OR REPRODUCTION IS PROHIBITED WITHOUT THE
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* PRIOR EXPRESS WRITTEN PERMISSION OF HAL COMPUTER SYSTEMS
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* INTERNATIONAL, LTD.
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*
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* RESTRICTED RIGHTS LEGEND
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* Use, duplication, or disclosure by the Government is subject
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* to the restrictions as set forth in subparagraph (c)(l)(ii)
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* of the Rights in Technical Data and Computer Software clause
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* at DFARS 252.227-7013.
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*
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* HAL COMPUTER SYSTEMS INTERNATIONAL, LTD.
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* 1315 Dell Avenue
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* Campbell, CA 95008
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*
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*/
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#include "hmphf/params.h"
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struct partition_t {
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int upper_bound;
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float bits;
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float p1;
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float p2;
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} partition_tbl [] = {
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{100, 3.2, 0.52, 0.31}, {1000, 3.4, 0.55, 0.3}, {10000, 3.4, 0.57, 0.29},
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{MAXINT, 4.2, 0.58, 0.3}
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};
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void params::select_value(float bts)
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{
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unsigned int i;
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for ( i=0; ; i++ ) {
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if ( (int)v_n <= partition_tbl[i].upper_bound )
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break;
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}
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if ( bts == 0.0 )
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v_bits = partition_tbl[i].bits;
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else
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v_bits = bts;
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v_r = 0;
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v_b = ( v_n > 0 ) ? (int)( float(v_n*v_bits) / (1.0+flog2(v_n)) ) : 0;
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v_p1 = (int)( partition_tbl[i].p1 * v_n);
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v_p2 = (int)( partition_tbl[i].p2 * v_b);
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if ( v_p1 == 0 ) v_p1++;
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if ( v_p2 == 0 ) v_p2++;
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v_seed = 1;
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}
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void params::re_select_value()
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{
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select_value(v_bits+0.2);
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}
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ostream& operator<<(ostream& out, params& pms)
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{
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debug(out, pms.v_n);
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debug(out, pms.v_b);
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debug(out, pms.v_p1);
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debug(out, pms.v_p2);
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debug(out, (int)pms.v_bits);
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debug(out, pms.v_r);
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debug(out, pms.v_seed);
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return out;
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}
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