Function fizz_buzz_copy_strings

compute/example/fizz_buzz.cpp:81–107

second-pass kernel which copies the fizz-buzz string for each number to buffer using the previously calculated offsets.

    // second-pass kernel which copies the fizz-buzz string for each number to
    // buffer using the previously calculated offsets.
    __kernel void fizz_buzz_copy_strings(__global const uint *offsets, __global char *buffer)
    {
        const uint i = get_global_id(0);
        const uint n = i + 1;
        const uint offset = offsets[i];

        if((n % 5 == 0) && (n % 3 == 0)){
            copy_string("fizzbuzz\n", 9, buffer + offset);
        }
        else if(n % 5 == 0){
            copy_string("fizz\n", 5, buffer + offset);
        }
        else if(n % 3 == 0){
            copy_string("buzz\n", 5, buffer + offset);
        }
        else {
            // convert number to string and write it to the output
            __global char *number = buffer + offset;
            uint n_ = n;
            while(n_){
                *number++ = (n_%10) + '0';
                n_ /= 10;
            }
            reverse_string(buffer + offset, number - 1);
            *number = '\n';
        }
    }
);

int main()