Merge functionality of misc_os_dependent into time_helper.h

Actions:
1. Remove unused functions from misc_os_dependent.h
2. Move three remaining functions, get_gmt_time, get_ns_count, and get_tick_count into time_helper.h
3. Remove unused functions from time_helper.h
4. Refactor get_ns_count and get_internet_time_str and get_time_interval_string
5. Remove/add includes as needed

Relevant commits on the old PR:
a9fbe52b02ffab451e90c977459fea4642731cd1
9a59b131c4ed1be8afe238fff3780fe203c65a46
7fa9e2817df9b9ef3f0290f7f86357939829e588

8 files changed, 33 insertions, 279 deletions

diff --git a/contrib/epee/include/math_helper.h b/contrib/epee/include/math_helper.h
index 29acffaea..6a759b515 100644
--- a/contrib/epee/include/math_helper.h
+++ b/contrib/epee/include/math_helper.h
@@ -37,8 +37,8 @@
 #include <boost/uuid/uuid.hpp>
 #include <boost/uuid/random_generator.hpp>
 
-#include "misc_os_dependent.h"
 #include "syncobj.h"
+#include "time_helper.h"
 
 namespace epee
 {
diff --git a/contrib/epee/include/misc_os_dependent.h b/contrib/epee/include/misc_os_dependent.h
deleted file mode 100644
index 522cdf263..000000000
--- a/contrib/epee/include/misc_os_dependent.h
+++ /dev/null
@@ -1,129 +0,0 @@
-// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
-// All rights reserved.
-// 
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-// * Neither the name of the Andrey N. Sabelnikov nor the
-// names of its contributors may be used to endorse or promote products
-// derived from this software without specific prior written permission.
-// 
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
-// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-// 
-#ifdef _WIN32
-#include <winsock2.h>
-#endif
-
-#ifdef WIN32
-  #ifndef WIN32_LEAN_AND_MEAN 
-  #define WIN32_LEAN_AND_MEAN
-  #endif
-
-  //#ifdef _WIN32_WINNT 
-  //  #undef _WIN32_WINNT
-  //  #define _WIN32_WINNT 0x0600
-  //#endif
-
-  
-#include <windows.h>
-#endif
-
-#ifdef __MACH__
-#include <mach/clock.h>
-#include <mach/mach.h>
-#endif
-
-#include <iostream>
-#include <ctime>
-
-#pragma once 
-namespace epee
-{
-namespace misc_utils
-{
-
-        inline uint64_t get_ns_count()
-        {
-#if defined(_MSC_VER)
-                return ::GetTickCount64() * 1000000;
-#elif defined(WIN32)
-                static LARGE_INTEGER pcfreq = {0};
-                LARGE_INTEGER ticks;
-                if (!pcfreq.QuadPart)
-                    QueryPerformanceFrequency(&pcfreq);
-                QueryPerformanceCounter(&ticks);
-                ticks.QuadPart *= 1000000000; /* we want nsec */
-                return ticks.QuadPart / pcfreq.QuadPart;
-#elif defined(__MACH__)
-                clock_serv_t cclock;
-                mach_timespec_t mts;
-
-                host_get_clock_service(mach_host_self(), SYSTEM_CLOCK, &cclock);
-                clock_get_time(cclock, &mts);
-                mach_port_deallocate(mach_task_self(), cclock);
-
-                return ((uint64_t)mts.tv_sec * 1000000000) + (mts.tv_nsec);
-#else
-                struct timespec ts;
-                if(clock_gettime(CLOCK_MONOTONIC, &ts) != 0) {
-                        return 0;
-                }
-                return ((uint64_t)ts.tv_sec * 1000000000) + (ts.tv_nsec);
-#endif
-        }
-
-        inline uint64_t get_tick_count()
-        {
-                return get_ns_count() / 1000000;
-        }
-
-
-        inline int call_sys_cmd(const std::string& cmd)
-	{      
-                std::cout << "# " << cmd << std::endl;
-
-		FILE * fp ;
-		//char tstCommand[] ="ls *";
-		char path[1000] = {0};
-#if !defined(__GNUC__) 
-		fp = _popen(cmd.c_str(), "r");
-#else
-		fp = popen(cmd.c_str(), "r");
-#endif
-		while ( fgets( path, 1000, fp ) != NULL )
-			std::cout << path;
-
-#if !defined(__GNUC__) 
-		_pclose(fp);
-#else
-		pclose(fp);
-#endif
-		return 0;
-
-	}
-
-	std::string get_thread_string_id();
-
-	inline bool get_gmt_time(time_t t, struct tm &tm)
-	{
-#ifdef _WIN32
-		return gmtime_s(&tm, &t);
-#else
-		return gmtime_r(&t, &tm);
-#endif
-	}
-}
-}
diff --git a/contrib/epee/include/net/levin_protocol_handler_async.h b/contrib/epee/include/net/levin_protocol_handler_async.h
index 7cc42b5c4..bd6ffe930 100644
--- a/contrib/epee/include/net/levin_protocol_handler_async.h
+++ b/contrib/epee/include/net/levin_protocol_handler_async.h
@@ -37,7 +37,7 @@
 #include "buffer.h"
 #include "misc_language.h"
 #include "syncobj.h"
-#include "misc_os_dependent.h"
+#include "time_helper.h"
 #include "int-util.h"
 
 #include <random>
diff --git a/contrib/epee/include/profile_tools.h b/contrib/epee/include/profile_tools.h
index a0b5f77f4..76f794a36 100644
--- a/contrib/epee/include/profile_tools.h
+++ b/contrib/epee/include/profile_tools.h
@@ -28,7 +28,7 @@
 #ifndef _PROFILE_TOOLS_H_
 #define _PROFILE_TOOLS_H_
 
-#include "misc_os_dependent.h"
+#include "time_helper.h"
 
 namespace epee
 {
diff --git a/contrib/epee/include/time_helper.h b/contrib/epee/include/time_helper.h
index 244b35800..632996bc5 100644
--- a/contrib/epee/include/time_helper.h
+++ b/contrib/epee/include/time_helper.h
@@ -28,132 +28,60 @@
 
 #pragma once
 
-//#include <atltime.h>
-//#include <sqlext.h>
-#include <boost/date_time/posix_time/posix_time.hpp>
-#include <boost/date_time/local_time/local_time.hpp>
-#include "pragma_comp_defs.h"
+#include <chrono>
+#include <cstdio>
+#include <ctime>
+#include <string>
 
 namespace epee
 {
 namespace misc_utils
 {
-
-#ifdef __ATLTIME_H__
-
-	inline
-	bool get_time_t_from_ole_date(DATE src, time_t& res)
+	inline bool get_gmt_time(time_t t, struct tm &tm)
 	{
-		SYSTEMTIME st = {0};
-		if(TRUE != ::VariantTimeToSystemTime(src, &st))
-			return false;
-		ATL::CTime ss(st);
-		res = ss.GetTime();
-		return true;
-	}
+#ifdef _WIN32
+		return gmtime_s(&tm, &t);
+#else
+		return gmtime_r(&t, &tm);
 #endif
-	inline 
-	std::string get_time_str(const time_t& time_)
-	{
-
-
-		char tmpbuf[200] = {0};
-		tm* pt = NULL;
-PRAGMA_WARNING_PUSH
-PRAGMA_WARNING_DISABLE_VS(4996)
-		pt = localtime(&time_);
-PRAGMA_WARNING_POP
-
-		if(pt)
-			strftime( tmpbuf, 199, "%d.%m.%Y %H:%M:%S", pt );
-		else
-		{
-			std::stringstream strs;
-			strs << "[wrong_time: " << std::hex << time_ << "]";
-			return strs.str();
-		}
-		return tmpbuf;
 	}
 
-	inline 
-		std::string get_time_str_v2(const time_t& time_)
-	{
-
-		char tmpbuf[200] = {0};
-		tm* pt = NULL;
-PRAGMA_WARNING_PUSH
-PRAGMA_WARNING_DISABLE_VS(4996)
-		pt = localtime(&time_);
-PRAGMA_WARNING_POP
-
-		if(pt)
-			strftime( tmpbuf, 199, "%Y_%m_%d %H_%M_%S", pt );
-		else
-		{
-			std::stringstream strs;
-			strs << "[wrong_time: " << std::hex << time_ << "]";
-			return strs.str();
-		}
-		return tmpbuf;
-	}
-
-  inline 
-    std::string get_time_str_v3(const boost::posix_time::ptime& time_)
-  {
-    return boost::posix_time::to_simple_string(time_);
-  }
-
-  
-
 	inline std::string get_internet_time_str(const time_t& time_)
 	{
 		char tmpbuf[200] = {0};
-		tm* pt = NULL;
-PRAGMA_WARNING_PUSH
-PRAGMA_WARNING_DISABLE_VS(4996)
-		pt = gmtime(&time_);
-PRAGMA_WARNING_POP
-		strftime( tmpbuf, 199, "%a, %d %b %Y %H:%M:%S GMT", pt );
+		struct tm pt;
+		get_gmt_time(time_, pt);
+		strftime(tmpbuf, 199, "%a, %d %b %Y %H:%M:%S GMT", &pt);
 		return tmpbuf;
 	}
 
 	inline std::string get_time_interval_string(const time_t& time_)
 	{
-		std::string res;
 		time_t tail = time_;
-PRAGMA_WARNING_PUSH
-PRAGMA_WARNING_DISABLE_VS(4244)
-		int days = tail/(60*60*24);
+		const int days = (int) (tail/(60*60*24));
 		tail = tail%(60*60*24);
-		int hours = tail/(60*60);
+		const int hours = (int) (tail/(60*60));
 		tail = tail%(60*60);
-		int minutes = tail/(60);
+		const int minutes = (int) (tail/(60));
 		tail = tail%(60);
-		int seconds = tail;
-PRAGMA_WARNING_POP
-		res = std::string() + "d" + boost::lexical_cast<std::string>(days) + ".h" + boost::lexical_cast<std::string>(hours) + ".m" + boost::lexical_cast<std::string>(minutes) + ".s" + boost::lexical_cast<std::string>(seconds);
-		return res;
+		const int seconds = (int) tail;
+
+		char tmpbuf[64] = {0};
+		snprintf(tmpbuf, sizeof(tmpbuf) - 1, "d%d.h%d.m%d.s%d", days, hours, minutes, seconds);
+
+		return tmpbuf;
 	}
 
-#ifdef __SQLEXT
-	inline
-	bool odbc_time_to_oledb_taime(const SQL_TIMESTAMP_STRUCT& odbc_timestamp, DATE& oledb_date)
+	inline uint64_t get_ns_count()
 	{
-		
-		SYSTEMTIME st = {0};
-		st.wYear = odbc_timestamp.year;
-		st.wDay = odbc_timestamp.day;
-		st.wHour = odbc_timestamp.hour ;
-		st.wMilliseconds = (WORD)odbc_timestamp.fraction ;
-		st.wMinute = odbc_timestamp.minute ;
-		st.wMonth = odbc_timestamp.month ;
-		st.wSecond = odbc_timestamp.second ;
-
-		if(TRUE != ::SystemTimeToVariantTime(&st, &oledb_date))
-			return false;
-		return true;
+		typedef std::chrono::duration<uint64_t, std::nano> ns_duration;
+		const ns_duration ns_since_epoch = std::chrono::steady_clock::now().time_since_epoch();
+		return ns_since_epoch.count();
 	}
 
-#endif
+	inline uint64_t get_tick_count()
+	{
+		return get_ns_count() / 1000000;
+	}
 }
 }
diff --git a/contrib/epee/src/CMakeLists.txt b/contrib/epee/src/CMakeLists.txt
index 13d8154f3..808b9f09e 100644
--- a/contrib/epee/src/CMakeLists.txt
+++ b/contrib/epee/src/CMakeLists.txt
@@ -35,7 +35,6 @@ monero_add_library(epee byte_slice.cpp byte_stream.cpp hex.cpp abstract_http_cli
     wipeable_string.cpp levin_base.cpp memwipe.c connection_basic.cpp network_throttle.cpp network_throttle-detail.cpp mlocker.cpp buffer.cpp net_ssl.cpp
     int-util.cpp portable_storage.cpp
     misc_language.cpp
-    misc_os_dependent.cpp
     file_io_utils.cpp
     net_parse_helpers.cpp
     http_base.cpp
diff --git a/contrib/epee/src/misc_os_dependent.cpp b/contrib/epee/src/misc_os_dependent.cpp
deleted file mode 100644
index cd4967131..000000000
--- a/contrib/epee/src/misc_os_dependent.cpp
+++ /dev/null
@@ -1,44 +0,0 @@
-// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
-// All rights reserved.
-// 
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are met:
-// * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-// * Redistributions in binary form must reproduce the above copyright
-// notice, this list of conditions and the following disclaimer in the
-// documentation and/or other materials provided with the distribution.
-// * Neither the name of the Andrey N. Sabelnikov nor the
-// names of its contributors may be used to endorse or promote products
-// derived from this software without specific prior written permission.
-// 
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
-// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-// 
-
-#include "misc_os_dependent.h"
-#include <boost/lexical_cast.hpp>
-
-namespace epee
-{
-namespace misc_utils
-{
-    // TODO: (vtnerd) This function is weird since boost::this_thread::get_id() exists but returns a different value.    
-	std::string get_thread_string_id()
-	{
-#if defined(_WIN32)
-		return boost::lexical_cast<std::string>(GetCurrentThreadId());
-#elif defined(__GNUC__)  
-		return boost::lexical_cast<std::string>(pthread_self());
-#endif
-	}
-}
-}
diff --git a/contrib/epee/src/mlog.cpp b/contrib/epee/src/mlog.cpp
index bcde215be..092d41777 100644
--- a/contrib/epee/src/mlog.cpp
+++ b/contrib/epee/src/mlog.cpp
@@ -40,7 +40,7 @@
 #include <boost/filesystem.hpp>
 #include <boost/algorithm/string.hpp>
 #include "string_tools.h"
-#include "misc_os_dependent.h"
+#include "time_helper.h"
 #include "misc_log_ex.h"
 
 #undef MONERO_DEFAULT_LOG_CATEGORY