BBHTTP transfer rate proposal

gistfile1.m

struct BBTransferRate {
    unsigned long bytesPerSecond;
    NSTimeInterval duration;
};
typedef struct BBTransferRate BBTransferRate;

BBTransferRate BBTransferRateMake(unsigned long bytesPerSecond, NSTimeInterval duration)
{
    BBTransferRate threshold;
    threshold.bytesPerSecond = bytesPerSecond;
    threshold.duration = duration;

    return threshold;
}

NSString* NSStringFromBBTransferRate(BBTransferRate transferRate)
{
    return [NSString stringWithFormat:@"%lu/s for %.0f seconds", transferRate.bytesPerSecond, transferRate.duration];
}