00001 /** @file 00002 00003 Mersenne Twister declarations adapted for Traffic Server 00004 00005 @section license License 00006 00007 A C-program for MT19937-64 (2004/9/29 version). 00008 Coded by Takuji Nishimura and Makoto Matsumoto. 00009 00010 This is a 64-bit version of Mersenne Twister pseudorandom number 00011 generator. 00012 00013 Before using, initialize the state by using init_genrand64(seed) 00014 or init_by_array64(init_key, key_length). 00015 00016 Copyright (C) 2004, Makoto Matsumoto and Takuji Nishimura, 00017 All rights reserved. 00018 00019 Redistribution and use in source and binary forms, with or without 00020 modification, are permitted provided that the following conditions 00021 are met: 00022 00023 1. Redistributions of source code must retain the above copyright 00024 notice, this list of conditions and the following disclaimer. 00025 00026 2. Redistributions in binary form must reproduce the above copyright 00027 notice, this list of conditions and the following disclaimer in the 00028 documentation and/or other materials provided with the distribution. 00029 00030 3. The names of its contributors may not be used to endorse or promote 00031 products derived from this software without specific prior written 00032 permission. 00033 00034 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 00035 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 00036 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 00037 A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 00038 CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 00039 EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 00040 PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 00041 PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 00042 LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 00043 NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 00044 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 00045 00046 References: 00047 T. Nishimura, ``Tables of 64-bit Mersenne Twisters'' 00048 ACM Transactions on Modeling and 00049 Computer Simulation 10. (2000) 348--357. 00050 M. Matsumoto and T. Nishimura, 00051 ``Mersenne Twister: a 623-dimensionally equidistributed 00052 uniform pseudorandom number generator'' 00053 ACM Transactions on Modeling and 00054 Computer Simulation 8. (Jan. 1998) 3--30. 00055 00056 Any feedback is very welcome. 00057 http://www.math.hiroshima-u.ac.jp/~m-mat/MT/emt.html 00058 email: m-mat @ math.sci.hiroshima-u.ac.jp (remove spaces) 00059 */ 00060 00061 #ifndef __INK_RAND_H__ 00062 #define __INK_RAND_H__ 00063 00064 00065 #include "ink_defs.h" 00066 #include "ink_apidefs.h" 00067 00068 00069 class InkRand 00070 { 00071 public: 00072 InkRand(uint64_t d); 00073 00074 void seed(uint64_t d); 00075 inkcoreapi uint64_t random(); 00076 double drandom(); 00077 00078 private: 00079 uint64_t mt[312]; 00080 int mti; 00081 }; 00082 00083 inline int ink_rand_r(uint32_t * p) { 00084 return (((*p) = (*p) * 1103515245 + 12345) % ((uint32_t) 0x7fffffff + 1)); 00085 } 00086 00087 #endif /* __INK_RAND_H__ */ 00088
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