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Diffstat (limited to 'node/CMWC4096.hpp')
| -rw-r--r-- | node/CMWC4096.hpp | 91 |
1 files changed, 0 insertions, 91 deletions
diff --git a/node/CMWC4096.hpp b/node/CMWC4096.hpp deleted file mode 100644 index b62d7d67..00000000 --- a/node/CMWC4096.hpp +++ /dev/null @@ -1,91 +0,0 @@ -/* - * ZeroTier One - Network Virtualization Everywhere - * Copyright (C) 2011-2015 ZeroTier, Inc. - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see <http://www.gnu.org/licenses/>. - * - * -- - * - * ZeroTier may be used and distributed under the terms of the GPLv3, which - * are available at: http://www.gnu.org/licenses/gpl-3.0.html - * - * If you would like to embed ZeroTier into a commercial application or - * redistribute it in a modified binary form, please contact ZeroTier Networks - * LLC. Start here: http://www.zerotier.com/ - */ - -#ifndef ZT_CMWC4096_HPP -#define ZT_CMWC4096_HPP - -#include <stdint.h> -#include "Utils.hpp" - -namespace ZeroTier { - -/** - * Complement Multiply With Carry random number generator - * - * Based on original code posted to Usenet in the public domain by - * George Marsaglia. Period is approximately 2^131086. - * - * This is not used for cryptographic purposes but for a very fast - * and high-quality PRNG elsewhere in the code. - */ -class CMWC4096 -{ -public: - /** - * Construct and initialize from secure random source - */ - CMWC4096() - throw() - { - Utils::getSecureRandom(Q,sizeof(Q)); - Utils::getSecureRandom(&c,sizeof(c)); - c %= 809430660; - i = 4095; - } - - inline uint32_t next32() - throw() - { - uint32_t __i = ++i & 4095; - const uint64_t t = (18782ULL * (uint64_t)Q[__i]) + (uint64_t)c; - c = (uint32_t)(t >> 32); - uint32_t x = c + (uint32_t)t; - const uint32_t p = (uint32_t)(x < c); x += p; c += p; - return (Q[__i] = 0xfffffffe - x); - } - - inline uint64_t next64() - throw() - { - return ((((uint64_t)next32()) << 32) ^ (uint64_t)next32()); - } - - inline double nextDouble() - throw() - { - return ((double)(next32()) / 4294967296.0); - } - -private: - uint32_t Q[4096]; - uint32_t c; - uint32_t i; -}; - -} // namespace ZeroTier - -#endif |