From 5b5041514f58f2b4b61f56373ed7c77522dbbe0e Mon Sep 17 00:00:00 2001
From: MoneroOcean <support@moneroocean.stream>
Date: Sun, 25 Mar 2018 00:00:06 +0100
Subject: [PATCH] Returned code

---
 src/common/util.h | 86 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 src/common/util.h

diff --git a/src/common/util.h b/src/common/util.h
new file mode 100644
index 0000000..8a1f4b0
--- /dev/null
+++ b/src/common/util.h
@@ -0,0 +1,86 @@
+// Copyright (c) 2012-2013 The Cryptonote developers
+// Distributed under the MIT/X11 software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#pragma once 
+
+#include <mutex>
+#include <system_error>
+#include <boost/filesystem.hpp>
+
+#include "crypto/crypto.h"
+#include "crypto/hash.h"
+#include "misc_language.h"
+#include "p2p/p2p_protocol_defs.h"
+
+namespace tools
+{
+  std::string get_default_data_dir();
+  std::string get_os_version_string();
+  bool create_directories_if_necessary(const std::string& path);
+  std::error_code replace_file(const std::string& replacement_name, const std::string& replaced_name);
+
+  inline crypto::hash get_proof_of_trust_hash(const nodetool::proof_of_trust& pot)
+  {
+    std::string s;
+    s.append(reinterpret_cast<const char*>(&pot.peer_id), sizeof(pot.peer_id));
+    s.append(reinterpret_cast<const char*>(&pot.time), sizeof(pot.time));
+    return crypto::cn_fast_hash(s.data(), s.size());
+  }
+
+
+  class signal_handler
+  {
+  public:
+    template<typename T>
+    static bool install(T t)
+    {
+#if defined(WIN32)
+      bool r = TRUE == ::SetConsoleCtrlHandler(&win_handler, TRUE);
+      if (r)
+      {
+        m_handler = t;
+      }
+      return r;
+#else
+      signal(SIGINT, posix_handler);
+      signal(SIGTERM, posix_handler);
+      m_handler = t;
+      return true;
+#endif
+    }
+
+  private:
+#if defined(WIN32)
+    static BOOL WINAPI win_handler(DWORD type)
+    {
+      if (CTRL_C_EVENT == type || CTRL_BREAK_EVENT == type)
+      {
+        handle_signal();
+        return TRUE;
+      }
+      else
+      {
+        LOG_PRINT_RED_L0("Got control signal " << type << ". Exiting without saving...");
+        return FALSE;
+      }
+      return TRUE;
+    }
+#else
+    static void posix_handler(int /*type*/)
+    {
+      handle_signal();
+    }
+#endif
+
+    static void handle_signal()
+    {
+      static std::mutex m_mutex;
+      std::unique_lock<std::mutex> lock(m_mutex);
+      m_handler();
+    }
+
+  private:
+    static std::function<void(void)> m_handler;
+  };
+}