how to make a long long

[Mihnea Balta]

On Thursday 20 February 2003 10:56, Adrian Sandor wrote:
> Wich is the proper way to make an unsigned long long
> from two unsigned ints (high and low dwords) without
> too many conversions and calculations?

Choose whatever you like:

int main(){
    union{
        struct{
            unsigned long long a:32;
            unsigned long long b:32;
        } gigi;
        unsigned long long l;
    } toto;
    unsigned long long l;
    unsigned long long referenceval;

    toto.gigi.a = 0xFFFFFFFF;
    toto.gigi.b = 0xFFFFFFFF;
    l = 0xFFFFFFFF;
    l <<= 32;
    l += 0xFFFFFFFF;
    memset(&referenceval, 0xFF, sizeof(referenceval));
    printf("%llu\n%llu\n%llu\n", toto.l, l, referenceval);
    return 0;
}

>
> thanks
>
> Adrian
>
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