1 /* glpbfx.h (basis factorization interface, bignum arithmetic) */
3 /***********************************************************************
4 * This code is part of GLPK (GNU Linear Programming Kit).
6 * Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008,
7 * 2009, 2010 Andrew Makhorin, Department for Applied Informatics,
8 * Moscow Aviation Institute, Moscow, Russia. All rights reserved.
9 * E-mail: <mao@gnu.org>.
11 * GLPK is free software: you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by
13 * the Free Software Foundation, either version 3 of the License, or
14 * (at your option) any later version.
16 * GLPK is distributed in the hope that it will be useful, but WITHOUT
17 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
18 * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
19 * License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with GLPK. If not, see <http://www.gnu.org/licenses/>.
23 ***********************************************************************/
30 #ifndef GLPBFX_DEFINED
31 #define GLPBFX_DEFINED
32 typedef struct { double _opaque_bfx; } BFX;
35 #define bfx_create_binv _glp_bfx_create_binv
36 #define bfx_is_valid _glp_bfx_is_valid
37 #define bfx_invalidate _glp_bfx_invalidate
38 #define bfx_factorize _glp_bfx_factorize
39 #define bfx_ftran _glp_bfx_ftran
40 #define bfx_btran _glp_bfx_btran
41 #define bfx_update _glp_bfx_update
42 #define bfx_delete_binv _glp_bfx_delete_binv
44 BFX *bfx_create_binv(void);
45 /* create factorization of the basis matrix */
47 int bfx_is_valid(BFX *binv);
48 /* check if factorization is valid */
50 void bfx_invalidate(BFX *binv);
51 /* invalidate factorization of the basis matrix */
53 int bfx_factorize(BFX *binv, int m, int (*col)(void *info, int j,
54 int ind[], mpq_t val[]), void *info);
55 /* compute factorization of the basis matrix */
57 void bfx_ftran(BFX *binv, mpq_t x[], int save);
58 /* perform forward transformation (FTRAN) */
60 void bfx_btran(BFX *binv, mpq_t x[]);
61 /* perform backward transformation (BTRAN) */
63 int bfx_update(BFX *binv, int j);
64 /* update factorization of the basis matrix */
66 void bfx_delete_binv(BFX *binv);
67 /* delete factorization of the basis matrix */