powrr.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 55 行

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#include "variety.h"
#include "cplx.h"
#include "mathcode.h"


_WMRTLINK double _IF_PowRR( double base, double power )
//=====================================================
{
// Return base ** power.

    if( base < 0.0 ) {
        return( __math2err( FUNC_POW | M_DOMAIN | V_ZERO, &base, &power ) );
    } else {
        if( base == 0.0 ) {
            if( power <= 0.0 ) {
                return( __math2err( FUNC_POW | M_DOMAIN | V_ZERO,
                                    &base, &power ) );
            }
        }
        return( pow( base, power ) );
    }
}