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/* spxchuzc.h */
/***********************************************************************
* This code is part of GLPK (GNU Linear Programming Kit).
* Copyright (C) 2015 Free Software Foundation, Inc.
* Written by Andrew Makhorin <mao@gnu.org>.
*
* GLPK is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* GLPK is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
* License for more details.
*
* You should have received a copy of the GNU General Public License
* along with GLPK. If not, see <http://www.gnu.org/licenses/>.
***********************************************************************/
#ifndef SPXCHUZC_H
#define SPXCHUZC_H
#include "spxlp.h"
#define spx_chuzc_sel _glp_spx_chuzc_sel
int spx_chuzc_sel(SPXLP *lp, const double d[/*1+n-m*/], double tol,
double tol1, int list[/*1+n-m*/]);
/* select eligible non-basic variables */
#define spx_chuzc_std _glp_spx_chuzc_std
int spx_chuzc_std(SPXLP *lp, const double d[/*1+n-m*/], int num,
const int list[]);
/* choose non-basic variable (Dantzig's rule) */
typedef struct SPXSE SPXSE;
struct SPXSE
{ /* projected steepest edge and Devex pricing data block */
int valid;
/* content validity flag */
char *refsp; /* char refsp[1+n]; */
/* refsp[0] is not used;
* refsp[k], 1 <= k <= n, is the flag meaning that variable x[k]
* is in the reference space */
double *gamma; /* double gamma[1+n-m]; */
/* gamma[0] is not used;
* gamma[j], 1 <= j <= n-m, is the weight for reduced cost d[j]
* of non-basic variable xN[j] in the current basis */
double *work; /* double work[1+m]; */
/* working array */
};
#define spx_alloc_se _glp_spx_alloc_se
void spx_alloc_se(SPXLP *lp, SPXSE *se);
/* allocate pricing data block */
#define spx_reset_refsp _glp_spx_reset_refsp
void spx_reset_refsp(SPXLP *lp, SPXSE *se);
/* reset reference space */
#define spx_eval_gamma_j _glp_spx_eval_gamma_j
double spx_eval_gamma_j(SPXLP *lp, SPXSE *se, int j);
/* compute projeted steepest edge weight directly */
#define spx_chuzc_pse _glp_spx_chuzc_pse
int spx_chuzc_pse(SPXLP *lp, SPXSE *se, const double d[/*1+n-m*/],
int num, const int list[]);
/* choose non-basic variable (projected steepest edge) */
#define spx_update_gamma _glp_spx_update_gamma
double spx_update_gamma(SPXLP *lp, SPXSE *se, int p, int q,
const double trow[/*1+n-m*/], const double tcol[/*1+m*/]);
/* update projected steepest edge weights exactly */
#define spx_free_se _glp_spx_free_se
void spx_free_se(SPXLP *lp, SPXSE *se);
/* deallocate pricing data block */
#endif
/* eof */
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