| /** @file |
| |
| Mersenne Twister declarations adapted for Traffic Server |
| |
| @section license License |
| |
| A C-program for MT19937-64 (2004/9/29 version). |
| Coded by Takuji Nishimura and Makoto Matsumoto. |
| |
| This is a 64-bit version of Mersenne Twister pseudorandom number |
| generator. |
| |
| Before using, initialize the state by using init_genrand64(seed) |
| or init_by_array64(init_key, key_length). |
| |
| Copyright (C) 2004, Makoto Matsumoto and Takuji Nishimura, |
| All rights reserved. |
| |
| Redistribution and use in source and binary forms, with or without |
| modification, are permitted provided that the following conditions |
| are met: |
| |
| 1. Redistributions of source code must retain the above copyright |
| notice, this list of conditions and the following disclaimer. |
| |
| 2. 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. |
| |
| 3. The names of its contributors may not 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. |
| |
| References: |
| T. Nishimura, ``Tables of 64-bit Mersenne Twisters'' |
| ACM Transactions on Modeling and |
| Computer Simulation 10. (2000) 348--357. |
| M. Matsumoto and T. Nishimura, |
| ``Mersenne Twister: a 623-dimensionally equidistributed |
| uniform pseudorandom number generator'' |
| ACM Transactions on Modeling and |
| Computer Simulation 8. (Jan. 1998) 3--30. |
| |
| Any feedback is very welcome. |
| http://www.math.hiroshima-u.ac.jp/~m-mat/MT/emt.html |
| email: m-mat @ math.sci.hiroshima-u.ac.jp (remove spaces) |
| */ |
| |
| #pragma once |
| |
| #include "tscore/ink_defs.h" |
| #include "tscore/ink_apidefs.h" |
| |
| class InkRand |
| { |
| public: |
| InkRand(uint64_t d); |
| |
| void seed(uint64_t d); |
| inkcoreapi uint64_t random(); |
| double drandom(); |
| |
| private: |
| uint64_t mt[312]; |
| int mti; |
| }; |
| |
| inline int |
| ink_rand_r(uint32_t *p) |
| { |
| return (((*p) = (*p) * 1103515245 + 12345) % ((uint32_t)0x7fffffff + 1)); |
| } |