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Is there a MulDiv equivalent for Linux?

The MulDiv function in the Windows API is equivalent (a*b)/c

, but stores the intermediate result a*b

into a 64-bit variable before dividing it by c

, to avoid integer overflow where a*b

greater than MAX_INT

but (a*b)/c

not.

WINBASEAPI
int
WINAPI
MulDiv(
    _In_ int nNumber,
    _In_ int nNumerator,
    _In_ int nDenominator
    );

When programming in Linux, is there an equivalent convenience function?

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1 answer


There seems to be no equivalent function for Linux.

I created a simple built in function that works (I haven't tested it with 64 bit compilation yet)



inline int mul_div(int number, int numerator, int denominator) {
    long long ret = number;
    ret *= numerator;
    ret /= denominator;
    return (int) ret;
}
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