/*
 * Revision Control Information
 *
 * $Source: /vol/opua/opua2/sis/sis-1.1/common/src/sis/mincov/RCS/mincov_int.h,v $
 * $Author: sis $
 * $Revision: 1.2 $
 * $Date: 1992/05/06 18:57:09 $
 *
 */
#include "sis.h"

typedef struct stats_struct stats_t;
struct stats_struct {
    int debug;			/* 1 if debugging is enabled */
    int max_print_depth;	/* dump stats for levels up to this level */
    int max_depth;		/* deepest the recursion has gone */
    int nodes;			/* total nodes visited */
    int component;		/* currently solving a component */
    int comp_count;		/* number of components detected */
    int gimpel_count;		/* number of times Gimpel reduction applied */
    int gimpel;			/* currently inside Gimpel reduction */
    long start_time;		/* cpu time when the covering started */
    int no_branching;
    int lower_bound;
};

typedef struct solution_struct solution_t;
struct solution_struct {
    sm_row *row;
    int cost;
};

extern solution_t *solution_alloc();
extern void solution_free();
extern solution_t *solution_dup();
extern void solution_accept();
extern void solution_reject();
extern void solution_add();
extern solution_t *solution_choose_best();

extern solution_t *sm_maximal_independent_set();
extern solution_t *sm_mincov();
extern int gimpel_reduce();

#define WEIGHT(weight, col)	(weight == NIL(int) ? 1 : weight[col])

/* for binate covering */
typedef struct bin_solution_struct bin_solution_t;
struct bin_solution_struct {
    pset set;
    int cost;
};

extern bin_solution_t *bin_solution_alloc();
extern void bin_solution_free();
extern bin_solution_t *bin_solution_dup();
extern void bin_solution_del();
extern void bin_solution_add();

extern void sm_bin_mincov();