Re: [Boost-users] [random] Problems generating pseudorandom 64-bit ints across multiple computers

Subject: Re: [Boost-users] [random] Problems generating pseudorandom 64-bit ints across multiple computers
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2009-02-27 16:16:59

AMDG

James Madison wrote:
> Thanks for the reply, I tried implementing your suggestion of using a 
> pair of iterators, but I think that I might be misinterpreting the 
> source, and that it is still only using a 32-bit seed.
>
> From looking at the source, the seed appears to be stored as the 
> variable "i", which is of type int.  The seed method using two 
> iterators does a ton of mangling over the range, and assigned i to the 
> result.

I don't understand.  I see this:

  template<class It>
  void seed(It& first, It last)
  {
    int j;
    for(j = 0; j < n && first != last; ++j, ++first)
      x[j] = *first;
    i = n;
    if(first == last && j < n)
      throw std::invalid_argument("mersenne_twister::seed");
  }

In Christ,
Steven Watanabe