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Annotation of 42BSD/usr.lib/libF77/cabs.c, revision 1.1

1.1     ! root        1: /*
        !             2:  *     "@(#)cabs.c     1.1"
        !             3:  */
        !             4: 
        !             5: double cabs(real, imag)
        !             6: double real, imag;
        !             7: {
        !             8: double temp, sqrt();
        !             9: 
        !            10: if(real < 0)
        !            11:        real = -real;
        !            12: if(imag < 0)
        !            13:        imag = -imag;
        !            14: if(imag > real){
        !            15:        temp = real;
        !            16:        real = imag;
        !            17:        imag = temp;
        !            18: }
        !            19: if((real+imag) == real)
        !            20:        return(real);
        !            21: 
        !            22: temp = imag/real;
        !            23: temp = real*sqrt(1.0 + temp*temp);  /*overflow!!*/
        !            24: return(temp);
        !            25: }

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