15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright 2005-2009 The RE2 Authors. All Rights Reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// license that can be found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Modified from Google perftools's tcmalloc_unittest.cc. 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 75821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#ifndef RE2_UTIL_RANDOM_H__ 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#define RE2_UTIL_RANDOM_H__ 95821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "util/util.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 125821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace re2 { 135821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 145821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// ACM minimal standard random number generator. (re-entrant.) 155821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class ACMRandom { 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 175821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ACMRandom(int32 seed) : seed_(seed) {} 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int32 Next(); 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int32 Uniform(int32); 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) void Reset(int32 seed) { seed_ = seed; } 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) int32 seed_; 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace re2 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif // RE2_UTIL_RANDOM_H__ 30