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Annotation of 42BSD/usr.lib/libm/floor.c, revision 1.1

1.1     ! root        1: /*     @(#)floor.c     4.1     12/25/82        */
        !             2: 
        !             3: /*
        !             4:  * floor and ceil-- greatest integer <= arg
        !             5:  * (resp least >=)
        !             6:  */
        !             7: 
        !             8: double modf();
        !             9: 
        !            10: double
        !            11: floor(d)
        !            12: double d;
        !            13: {
        !            14:        double fract;
        !            15: 
        !            16:        if (d<0.0) {
        !            17:                d = -d;
        !            18:                fract = modf(d, &d);
        !            19:                if (fract != 0.0)
        !            20:                        d += 1;
        !            21:                d = -d;
        !            22:        } else
        !            23:                modf(d, &d);
        !            24:        return(d);
        !            25: }
        !            26: 
        !            27: double
        !            28: ceil(d)
        !            29: double d;
        !            30: {
        !            31:        return(-floor(-d));
        !            32: }

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