diff options
Diffstat (limited to 'test/monniaux/glpk-4.65/src/api/wript.c')
| -rw-r--r-- | test/monniaux/glpk-4.65/src/api/wript.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/test/monniaux/glpk-4.65/src/api/wript.c b/test/monniaux/glpk-4.65/src/api/wript.c new file mode 100644 index 00000000..f2ca802c --- /dev/null +++ b/test/monniaux/glpk-4.65/src/api/wript.c @@ -0,0 +1,124 @@ +/* wript.c (write interior-point solution in GLPK format) */ + +/*********************************************************************** +* This code is part of GLPK (GNU Linear Programming Kit). +* +* Copyright (C) 2010-2016 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" + +/*********************************************************************** +* NAME +* +* glp_write_ipt - write interior-point solution in GLPK format +* +* SYNOPSIS +* +* int glp_write_ipt(glp_prob *P, const char *fname); +* +* DESCRIPTION +* +* The routine glp_write_ipt writes interior-point solution to a text +* file in GLPK format. +* +* RETURNS +* +* If the operation was successful, the routine returns zero. Otherwise +* it prints an error message and returns non-zero. */ + +int glp_write_ipt(glp_prob *P, const char *fname) +{ glp_file *fp; + GLPROW *row; + GLPCOL *col; + int i, j, count, ret = 1; + char *s; +#if 0 /* 04/IV-2016 */ + if (P == NULL || P->magic != GLP_PROB_MAGIC) + xerror("glp_write_ipt: P = %p; invalid problem object\n", P); +#endif + if (fname == NULL) + xerror("glp_write_ipt: fname = %d; invalid parameter\n", fname) + ; + xprintf("Writing interior-point solution to '%s'...\n", fname); + fp = glp_open(fname, "w"), count = 0; + if (fp == NULL) + { xprintf("Unable to create '%s' - %s\n", fname, get_err_msg()); + goto done; + } + /* write comment lines */ + glp_format(fp, "c %-12s%s\n", "Problem:", + P->name == NULL ? "" : P->name), count++; + glp_format(fp, "c %-12s%d\n", "Rows:", P->m), count++; + glp_format(fp, "c %-12s%d\n", "Columns:", P->n), count++; + glp_format(fp, "c %-12s%d\n", "Non-zeros:", P->nnz), count++; + switch (P->ipt_stat) + { case GLP_OPT: s = "OPTIMAL"; break; + case GLP_INFEAS: s = "INFEASIBLE (INTERMEDIATE)"; break; + case GLP_NOFEAS: s = "INFEASIBLE (FINAL)"; break; + case GLP_UNDEF: s = "UNDEFINED"; break; + default: s = "???"; break; + } + glp_format(fp, "c %-12s%s\n", "Status:", s), count++; + switch (P->dir) + { case GLP_MIN: s = "MINimum"; break; + case GLP_MAX: s = "MAXimum"; break; + default: s = "???"; break; + } + glp_format(fp, "c %-12s%s%s%.10g (%s)\n", "Objective:", + P->obj == NULL ? "" : P->obj, + P->obj == NULL ? "" : " = ", P->ipt_obj, s), count++; + glp_format(fp, "c\n"), count++; + /* write solution line */ + glp_format(fp, "s ipt %d %d ", P->m, P->n), count++; + switch (P->ipt_stat) + { case GLP_OPT: glp_format(fp, "o"); break; + case GLP_INFEAS: glp_format(fp, "i"); break; + case GLP_NOFEAS: glp_format(fp, "n"); break; + case GLP_UNDEF: glp_format(fp, "u"); break; + default: glp_format(fp, "?"); break; + } + glp_format(fp, " %.*g\n", DBL_DIG, P->ipt_obj); + /* write row solution descriptor lines */ + for (i = 1; i <= P->m; i++) + { row = P->row[i]; + glp_format(fp, "i %d %.*g %.*g\n", i, DBL_DIG, row->pval, + DBL_DIG, row->dval), count++; + } + /* write column solution descriptor lines */ + for (j = 1; j <= P->n; j++) + { col = P->col[j]; + glp_format(fp, "j %d %.*g %.*g\n", j, DBL_DIG, col->pval, + DBL_DIG, col->dval), count++; + } + /* write end line */ + glp_format(fp, "e o f\n"), count++; + if (glp_ioerr(fp)) + { xprintf("Write error on '%s' - %s\n", fname, get_err_msg()); + goto done; + } + /* interior-point solution has been successfully written */ + xprintf("%d lines were written\n", count); + ret = 0; +done: if (fp != NULL) + glp_close(fp); + return ret; +} + +/* eof */ |