git: 9front

ref: ccf40c7d068df5ddb850b7ded876ca00fc6a094d
dir: /sys/src/libsat/satmore.c/

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#include <u.h>
#include <libc.h>
#include <sat.h>
#include "impl.h"

int
satmore(SATSolve *s)
{
	int *a, i, n;

	if(s == nil) return 1;
	s->scrap = a = satrealloc(s, nil, s->nvar * sizeof(int));
	n = 0;
	for(i = 0; i < s->nvar; i++)
		switch(s->lit[2*i].val){
		case 0: a[n++] = i+1; break;
		case 1: a[n++] = -(i+1); break;
		}
	if(n > 0)
		satadd1(s, a, n);
	free(a);
	s->scrap = nil;
	return satsolve(s);
}