GLib.bit_nth_lsf

function bit_nth_lsf(mask: Number(gulong), nth_bit: Number(gint)): Number(gint) {
    // Gjs wrapper for g_bit_nth_lsf()
}

Find the position of the first bit set in mask, searching from (but not including) nth_bit upwards. Bits are numbered from 0 (least significant) to sizeof(#gulong) * 8 - 1 (31 or 63, usually). To start searching from the 0th bit, set nth_bit to -1.

mask: a #gulong containing flags
nth_bit: the index of the bit to start the search from
Returns: the index of the first bit set which is higher than nth_bit