ifcdabs.c

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C语言 代码 · 共 54 行

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*                            Open Watcom Project
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#include "variety.h"
#include "cplx.h"
#include "pdiv.h"

_WMRTLINK double _IF_CDABS( double rp, double ip )
//================================================
{
// Return the absolute value of arg.

    rp = fabs( rp );
    ip = fabs( ip );
    if( rp > ip ) {
        ip = PDIV( ip , rp );
        return( rp * sqrt( 1.0 + ip * ip ) );
    } else if( ip == 0.0 ) {
        return( rp );
    } else {
        rp = PDIV( rp , ip );
        return( ip * sqrt( 1.0 + rp * rp ) );
    }
}