twisterp2pnetworkbittorrentblockchainipv6microbloggingdecentralizedsocial-networkdhttwister-ipv6twister-coretwisterarmyp2p-networktwister-server
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
62 lines
2.0 KiB
62 lines
2.0 KiB
/* |
|
|
|
Copyright (c) 2011-2012, Arvid Norberg |
|
All rights reserved. |
|
|
|
Redistribution and use in source and binary forms, with or without |
|
modification, are permitted provided that the following conditions |
|
are met: |
|
|
|
* Redistributions of source code must retain the above copyright |
|
notice, this list of conditions and the following disclaimer. |
|
* Redistributions in binary form must reproduce the above copyright |
|
notice, this list of conditions and the following disclaimer in |
|
the documentation and/or other materials provided with the distribution. |
|
* Neither the name of the author nor the names of its |
|
contributors may be used to endorse or promote products derived |
|
from this software without specific prior written permission. |
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
|
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
|
ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
|
LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
|
CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
|
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
|
INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
|
CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
|
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
|
POSSIBILITY OF SUCH DAMAGE. |
|
|
|
*/ |
|
|
|
#include "libtorrent/random.hpp" |
|
|
|
namespace libtorrent |
|
{ |
|
|
|
namespace |
|
{ |
|
boost::uint32_t x = 123456789; |
|
} |
|
|
|
void random_seed(boost::uint32_t v) |
|
{ |
|
x = v; |
|
} |
|
|
|
// this is an xorshift random number generator |
|
// see: http://en.wikipedia.org/wiki/Xorshift |
|
boost::uint32_t random() |
|
{ |
|
static boost::uint32_t y = 362436069; |
|
static boost::uint32_t z = 521288629; |
|
static boost::uint32_t w = 88675123; |
|
boost::uint32_t t; |
|
|
|
t = x ^ (x << 11); |
|
x = y; y = z; z = w; |
|
return w = w ^ (w >> 19) ^ (t ^ (t >> 8)); |
|
} |
|
} |
|
|
|
|