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/* ckasn.c (check correctness of assignment problem data) */
/***********************************************************************
* 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 "glpk.h"
/***********************************************************************
* NAME
*
* glp_check_asnprob - check correctness of assignment problem data
*
* SYNOPSIS
*
* int glp_check_asnprob(glp_graph *G, int v_set);
*
* RETURNS
*
* If the specified assignment problem data are correct, the routine
* glp_check_asnprob returns zero, otherwise, non-zero. */
int glp_check_asnprob(glp_graph *G, int v_set)
{ glp_vertex *v;
int i, k, ret = 0;
if (v_set >= 0 && v_set > G->v_size - (int)sizeof(int))
xerror("glp_check_asnprob: v_set = %d; invalid offset\n",
v_set);
for (i = 1; i <= G->nv; i++)
{ v = G->v[i];
if (v_set >= 0)
{ memcpy(&k, (char *)v->data + v_set, sizeof(int));
if (k == 0)
{ if (v->in != NULL)
{ ret = 1;
break;
}
}
else if (k == 1)
{ if (v->out != NULL)
{ ret = 2;
break;
}
}
else
{ ret = 3;
break;
}
}
else
{ if (v->in != NULL && v->out != NULL)
{ ret = 4;
break;
}
}
}
return ret;
}
/* eof */
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