Subversion Repositories planix.SVN

#include <u.h>
#include <libc.h>
/*
 * floor and ceil-- greatest integer <= arg
 * (resp least >=)
 */

double
floor(double d)
{
        double fract;

        if(d < 0) {
                fract = modf(-d, &d);
                if(fract != 0.0)
                        d += 1;
                d = -d;
        } else
                modf(d, &d);
        return d;
}

double
ceil(double d)
{
        return -floor(-d);
}