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| author | Pieter Wuille <pieter.wuille@gmail.com> | 2013-08-24 22:21:41 +0200 |
|---|---|---|
| committer | Pieter Wuille <pieter.wuille@gmail.com> | 2013-08-24 22:21:41 +0200 |
| commit | 877b5e3653f12882e12c75aa0bb5be47f847bd09 (patch) | |
| tree | 399b43ec4298fdefe16fd9c33e684b3e58867755 /src/leveldb/util/random.h | |
| parent | e9e2ef5fbd610fbaa3801440254c39ac4ba8f91d (diff) | |
| parent | eed29f0f50806b9cfe9653509e7ed7f7eebdd3e3 (diff) | |
Merge src/leveldb changes for LevelDB 1.13
Diffstat (limited to 'src/leveldb/util/random.h')
| -rw-r--r-- | src/leveldb/util/random.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/leveldb/util/random.h b/src/leveldb/util/random.h index 07538242ea..ddd51b1c7b 100644 --- a/src/leveldb/util/random.h +++ b/src/leveldb/util/random.h @@ -16,7 +16,12 @@ class Random { private: uint32_t seed_; public: - explicit Random(uint32_t s) : seed_(s & 0x7fffffffu) { } + explicit Random(uint32_t s) : seed_(s & 0x7fffffffu) { + // Avoid bad seeds. + if (seed_ == 0 || seed_ == 2147483647L) { + seed_ = 1; + } + } uint32_t Next() { static const uint32_t M = 2147483647L; // 2^31-1 static const uint64_t A = 16807; // bits 14, 8, 7, 5, 2, 1, 0 |