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Annotation of researchv10no/libj/atan2.c, revision 1.1

1.1     ! root        1: static qatan2();
        !             2: atan2(xx, yy){
        !             3:        register x, y;
        !             4:        x=abs(xx);
        !             5:        y=abs(yy);
        !             6:        if(xx>=0 && yy>=0)
        !             7:                return(qatan2(x, y));
        !             8:        if(xx<0 && yy<=0)
        !             9:                return(180+qatan2(x, y));
        !            10:        if(xx<0 && yy>0)
        !            11:                return(180-qatan2(x, y));
        !            12:        return(360-qatan2(x, y));
        !            13: }
        !            14: static
        !            15: qatan2(x, y)
        !            16:        register x, y;
        !            17: {
        !            18:        if(x<y)
        !            19:                return(90-(45*((long)x)/y));
        !            20:        if(y==0)
        !            21:                return(0);
        !            22:        return(45*((long)y)/x);
        !            23: }

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