1 files changed, 0 insertions, 59 deletions
diff --git a/src/leveldb/util/random.h b/src/leveldb/util/random.h
deleted file mode 100644
index 07538242ea..0000000000
--- a/src/leveldb/util/random.h
+++ /dev/null
@@ -1,59 +0,0 @@
-// Copyright (c) 2011 The LevelDB Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file. See the AUTHORS file for names of contributors.
-
-#ifndef STORAGE_LEVELDB_UTIL_RANDOM_H_
-#define STORAGE_LEVELDB_UTIL_RANDOM_H_
-
-#include <stdint.h>
-
-namespace leveldb {
-
-// A very simple random number generator.  Not especially good at
-// generating truly random bits, but good enough for our needs in this
-// package.
-class Random {
- private:
-  uint32_t seed_;
- public:
-  explicit Random(uint32_t s) : seed_(s & 0x7fffffffu) { }
-  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
-    // We are computing
-    //       seed_ = (seed_ * A) % M,    where M = 2^31-1
-    //
-    // seed_ must not be zero or M, or else all subsequent computed values
-    // will be zero or M respectively.  For all other values, seed_ will end
-    // up cycling through every number in [1,M-1]
-    uint64_t product = seed_ * A;
-
-    // Compute (product % M) using the fact that ((x << 31) % M) == x.
-    seed_ = static_cast<uint32_t>((product >> 31) + (product & M));
-    // The first reduction may overflow by 1 bit, so we may need to
-    // repeat.  mod == M is not possible; using > allows the faster
-    // sign-bit-based test.
-    if (seed_ > M) {
-      seed_ -= M;
-    }
-    return seed_;
-  }
-  // Returns a uniformly distributed value in the range [0..n-1]
-  // REQUIRES: n > 0
-  uint32_t Uniform(int n) { return Next() % n; }
-
-  // Randomly returns true ~"1/n" of the time, and false otherwise.
-  // REQUIRES: n > 0
-  bool OneIn(int n) { return (Next() % n) == 0; }
-
-  // Skewed: pick "base" uniformly from range [0,max_log] and then
-  // return "base" random bits.  The effect is to pick a number in the
-  // range [0,2^max_log-1] with exponential bias towards smaller numbers.
-  uint32_t Skewed(int max_log) {
-    return Uniform(1 << Uniform(max_log + 1));
-  }
-};
-
-}  // namespace leveldb
-
-#endif  // STORAGE_LEVELDB_UTIL_RANDOM_H_