bin: consolidate clients

[awesomized/libmemcached] / src / bin / common / random.hpp

diff --git a/src/bin/common/random.hpp b/src/bin/common/random.hpp
new file mode 100644 (file)
index 0000000..eab844f
--- /dev/null
+++ b/src/bin/common/random.hpp
@@ -0,0 +1,44 @@
+/*
+    +--------------------------------------------------------------------+
+    | libmemcached - C/C++ Client Library for memcached                  |
+    +--------------------------------------------------------------------+
+    | Redistribution and use in source and binary forms, with or without |
+    | modification, are permitted under the terms of the BSD license.    |
+    | You should have received a copy of the license in a bundled file   |
+    | named LICENSE; in case you did not receive a copy you can review   |
+    | the terms online at: https://opensource.org/licenses/BSD-3-Clause  |
+    +--------------------------------------------------------------------+
+    | Copyright (c) 2006-2014 Brian Aker   https://datadifferential.com/ |
+    | Copyright (c) 2020 Michael Wallner   <mike@php.net>                |
+    +--------------------------------------------------------------------+
+*/
+
+#pragma once
+
+#include "time.hpp"
+#include <random>
+
+class random64 {
+public:
+  using typ = std::mt19937_64::result_type;
+
+  random64()
+  : gen{static_cast<typ>(time_clock::now().time_since_epoch().count())}
+  , dst{}
+  {}
+
+  typ operator()(typ min = 0, typ max = std::numeric_limits<typ>::max()) {
+    return (dst(gen) % (max - min)) + min;
+  }
+
+  void fill(char *buf, size_t len,
+      const std::string &set = "0123456789ABCDEFGHIJKLMNOPQRSTWXYZabcdefghijklmnopqrstuvwxyz") {
+    for (auto i = 0ul; i < len; ++i) {
+      buf[i] = set[(*this)(0, set.length()-1)];
+    }
+  }
+
+private:
+  std::mt19937_64 gen;
+  std::uniform_int_distribution<typ> dst;
+};