diff options
Diffstat (limited to 'test/monniaux/glpk-4.65/src/api/prmip.c')
| -rw-r--r-- | test/monniaux/glpk-4.65/src/api/prmip.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/test/monniaux/glpk-4.65/src/api/prmip.c b/test/monniaux/glpk-4.65/src/api/prmip.c new file mode 100644 index 00000000..885ed82a --- /dev/null +++ b/test/monniaux/glpk-4.65/src/api/prmip.c @@ -0,0 +1,155 @@ +/* prmip.c (write MIP solution in printable format) */ + +/*********************************************************************** +* This code is part of GLPK (GNU Linear Programming Kit). +* +* Copyright (C) 2009-2016 Andrew Makhorin, Department for Applied +* Informatics, Moscow Aviation Institute, Moscow, Russia. All rights +* reserved. E-mail: <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/>. +***********************************************************************/ + +#include "env.h" +#include "prob.h" + +#define xfprintf glp_format + +int glp_print_mip(glp_prob *P, const char *fname) +{ /* write MIP solution in printable format */ + glp_file *fp; + GLPROW *row; + GLPCOL *col; + int i, j, t, ae_ind, re_ind, ret; + double ae_max, re_max; + xprintf("Writing MIP solution to '%s'...\n", fname); + fp = glp_open(fname, "w"); + if (fp == NULL) + { xprintf("Unable to create '%s' - %s\n", fname, get_err_msg()); + ret = 1; + goto done; + } + xfprintf(fp, "%-12s%s\n", "Problem:", + P->name == NULL ? "" : P->name); + xfprintf(fp, "%-12s%d\n", "Rows:", P->m); + xfprintf(fp, "%-12s%d (%d integer, %d binary)\n", "Columns:", + P->n, glp_get_num_int(P), glp_get_num_bin(P)); + xfprintf(fp, "%-12s%d\n", "Non-zeros:", P->nnz); + t = glp_mip_status(P); + xfprintf(fp, "%-12s%s\n", "Status:", + t == GLP_OPT ? "INTEGER OPTIMAL" : + t == GLP_FEAS ? "INTEGER NON-OPTIMAL" : + t == GLP_NOFEAS ? "INTEGER EMPTY" : + t == GLP_UNDEF ? "INTEGER UNDEFINED" : "???"); + xfprintf(fp, "%-12s%s%s%.10g (%s)\n", "Objective:", + P->obj == NULL ? "" : P->obj, + P->obj == NULL ? "" : " = ", P->mip_obj, + P->dir == GLP_MIN ? "MINimum" : + P->dir == GLP_MAX ? "MAXimum" : "???"); + xfprintf(fp, "\n"); + xfprintf(fp, " No. Row name Activity Lower bound " + " Upper bound\n"); + xfprintf(fp, "------ ------------ ------------- ------------- " + "-------------\n"); + for (i = 1; i <= P->m; i++) + { row = P->row[i]; + xfprintf(fp, "%6d ", i); + if (row->name == NULL || strlen(row->name) <= 12) + xfprintf(fp, "%-12s ", row->name == NULL ? "" : row->name); + else + xfprintf(fp, "%s\n%20s", row->name, ""); + xfprintf(fp, "%3s", ""); + xfprintf(fp, "%13.6g ", + fabs(row->mipx) <= 1e-9 ? 0.0 : row->mipx); + if (row->type == GLP_LO || row->type == GLP_DB || + row->type == GLP_FX) + xfprintf(fp, "%13.6g ", row->lb); + else + xfprintf(fp, "%13s ", ""); + if (row->type == GLP_UP || row->type == GLP_DB) + xfprintf(fp, "%13.6g ", row->ub); + else + xfprintf(fp, "%13s ", row->type == GLP_FX ? "=" : ""); + xfprintf(fp, "\n"); + } + xfprintf(fp, "\n"); + xfprintf(fp, " No. Column name Activity Lower bound " + " Upper bound\n"); + xfprintf(fp, "------ ------------ ------------- ------------- " + "-------------\n"); + for (j = 1; j <= P->n; j++) + { col = P->col[j]; + xfprintf(fp, "%6d ", j); + if (col->name == NULL || strlen(col->name) <= 12) + xfprintf(fp, "%-12s ", col->name == NULL ? "" : col->name); + else + xfprintf(fp, "%s\n%20s", col->name, ""); + xfprintf(fp, "%s ", + col->kind == GLP_CV ? " " : + col->kind == GLP_IV ? "*" : "?"); + xfprintf(fp, "%13.6g ", + fabs(col->mipx) <= 1e-9 ? 0.0 : col->mipx); + if (col->type == GLP_LO || col->type == GLP_DB || + col->type == GLP_FX) + xfprintf(fp, "%13.6g ", col->lb); + else + xfprintf(fp, "%13s ", ""); + if (col->type == GLP_UP || col->type == GLP_DB) + xfprintf(fp, "%13.6g ", col->ub); + else + xfprintf(fp, "%13s ", col->type == GLP_FX ? "=" : ""); + xfprintf(fp, "\n"); + } + xfprintf(fp, "\n"); + xfprintf(fp, "Integer feasibility conditions:\n"); + xfprintf(fp, "\n"); + glp_check_kkt(P, GLP_MIP, GLP_KKT_PE, &ae_max, &ae_ind, &re_max, + &re_ind); + xfprintf(fp, "KKT.PE: max.abs.err = %.2e on row %d\n", + ae_max, ae_ind); + xfprintf(fp, " max.rel.err = %.2e on row %d\n", + re_max, re_ind); + xfprintf(fp, "%8s%s\n", "", + re_max <= 1e-9 ? "High quality" : + re_max <= 1e-6 ? "Medium quality" : + re_max <= 1e-3 ? "Low quality" : "SOLUTION IS WRONG"); + xfprintf(fp, "\n"); + glp_check_kkt(P, GLP_MIP, GLP_KKT_PB, &ae_max, &ae_ind, &re_max, + &re_ind); + xfprintf(fp, "KKT.PB: max.abs.err = %.2e on %s %d\n", + ae_max, ae_ind <= P->m ? "row" : "column", + ae_ind <= P->m ? ae_ind : ae_ind - P->m); + xfprintf(fp, " max.rel.err = %.2e on %s %d\n", + re_max, re_ind <= P->m ? "row" : "column", + re_ind <= P->m ? re_ind : re_ind - P->m); + xfprintf(fp, "%8s%s\n", "", + re_max <= 1e-9 ? "High quality" : + re_max <= 1e-6 ? "Medium quality" : + re_max <= 1e-3 ? "Low quality" : "SOLUTION IS INFEASIBLE"); + xfprintf(fp, "\n"); + xfprintf(fp, "End of output\n"); +#if 0 /* FIXME */ + xfflush(fp); +#endif + if (glp_ioerr(fp)) + { xprintf("Write error on '%s' - %s\n", fname, get_err_msg()); + ret = 1; + goto done; + } + ret = 0; +done: if (fp != NULL) glp_close(fp); + return ret; +} + +/* eof */ |