| Ian Hodson | 2ee91b4 | 2012-05-14 12:29:36 +0100 | [diff] [blame] | 1 | // Copyright 2005-2009 The RE2 Authors. All Rights Reserved. |
| 2 | // Use of this source code is governed by a BSD-style |
| 3 | // license that can be found in the LICENSE file. |
| 4 | |
| 5 | // Modified from Google perftools's tcmalloc_unittest.cc. |
| 6 | |
| 7 | #ifndef RE2_UTIL_RANDOM_H__ |
| 8 | #define RE2_UTIL_RANDOM_H__ |
| 9 | |
| 10 | #include "util/util.h" |
| 11 | |
| 12 | namespace re2 { |
| 13 | |
| 14 | // ACM minimal standard random number generator. (re-entrant.) |
| 15 | class ACMRandom { |
| 16 | public: |
| 17 | ACMRandom(int32 seed) : seed_(seed) {} |
| 18 | int32 Next(); |
| 19 | int32 Uniform(int32); |
| 20 | |
| 21 | void Reset(int32 seed) { seed_ = seed; } |
| 22 | |
| 23 | private: |
| 24 | int32 seed_; |
| 25 | }; |
| 26 | |
| 27 | } // namespace re2 |
| 28 | |
| 29 | #endif // RE2_UTIL_RANDOM_H__ |