NOISSUE add implementations of system query functions

* system memory size in bytes
* system architecture is 64bit?
* CPU architecture is 64bit?

libraries/ganalytics/src/sys_unix.cpp

@@ -1,6 +1,7 @@
 #include "sys.h"
 
 #include <sys/utsname.h>
+#include <fstream>
 
 QString Sys::getSystemInfo()
 {
@@ -11,3 +12,38 @@ QString Sys::getSystemInfo()
 
 	return system + "; " + release;
 }
+
+uint64_t Sys::getSystemRam()
+{
+	std::string token;
+	std::ifstream file("/proc/meminfo");
+	while(file >> token)
+	{
+		if(token == "MemTotal:")
+		{
+			uint64_t mem;
+			if(file >> mem)
+			{
+				return mem * 1024ull;
+			}
+			else
+			{
+				return 0;
+			}
+		}
+		// ignore rest of the line
+		file.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
+	}
+	return 0; // nothing found
+}
+
+bool Sys::isCPU64bit()
+{
+	return isSystem64bit();
+}
+
+bool Sys::isSystem64bit()
+{
+	// kernel build arch on linux
+	return QSysInfo::currentCpuArchitecture() == "x86_64";
+}