From 44805145dc385ba9ffe0d78f2e723cef42984537 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Petr=20Mr=C3=A1zek?= <peterix@gmail.com>
Date: Tue, 22 Nov 2016 00:57:15 +0100
Subject: [PATCH] NOISSUE add implementations of system query functions

* system memory size in bytes
* system architecture is 64bit?
* CPU architecture is 64bit?
---
 libraries/ganalytics/src/sys.h         |  6 +++++
 libraries/ganalytics/src/sys_apple.cpp | 29 +++++++++++++++++++++
 libraries/ganalytics/src/sys_unix.cpp  | 36 ++++++++++++++++++++++++++
 libraries/ganalytics/src/sys_win32.cpp | 34 ++++++++++++++++++++++++
 4 files changed, 105 insertions(+)

diff --git a/libraries/ganalytics/src/sys.h b/libraries/ganalytics/src/sys.h
index ef37cbde7..40e4e5137 100644
--- a/libraries/ganalytics/src/sys.h
+++ b/libraries/ganalytics/src/sys.h
@@ -8,4 +8,10 @@ namespace Sys
  * @return os       A QString with the name and version of the operating system.
  */
 QString getSystemInfo();
+
+uint64_t getSystemRam();
+
+bool isSystem64bit();
+
+bool isCPU64bit();
 }
diff --git a/libraries/ganalytics/src/sys_apple.cpp b/libraries/ganalytics/src/sys_apple.cpp
index c648970e4..f221a5279 100644
--- a/libraries/ganalytics/src/sys_apple.cpp
+++ b/libraries/ganalytics/src/sys_apple.cpp
@@ -1,5 +1,6 @@
 #include "sys.h"
 
+// FIXME: replace with our version...
 QString Sys::getSystemInfo()
 {
 	QSysInfo::MacVersion version = QSysInfo::macVersion();
@@ -116,3 +117,31 @@ QString Sys::getSystemInfo()
 	}
 	return os;
 }
+
+#include <sys/sysctl.h>
+
+uint64_t Sys::getSystemRam()
+{
+	uint64_t memsize;
+	size_t memsizesize = sizeof(memsize);
+	if(!sysctlbyname("hw.memsize", &memsize, &memsizesize, NULL, 0))
+	{
+		return memsize;
+	}
+	else
+	{
+		return 0;
+	}
+}
+
+bool Sys::isCPU64bit()
+{
+	// not even going to pretend I'm going to support anything else
+	return true;
+}
+
+bool Sys::isSystem64bit()
+{
+	// yep. maybe when we have 128bit CPUs on consumer devices.
+	return true;
+}
diff --git a/libraries/ganalytics/src/sys_unix.cpp b/libraries/ganalytics/src/sys_unix.cpp
index b4dd9b2b4..9569fbb6b 100644
--- a/libraries/ganalytics/src/sys_unix.cpp
+++ b/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";
+}
diff --git a/libraries/ganalytics/src/sys_win32.cpp b/libraries/ganalytics/src/sys_win32.cpp
index 42c0f2809..4c4e35a97 100644
--- a/libraries/ganalytics/src/sys_win32.cpp
+++ b/libraries/ganalytics/src/sys_win32.cpp
@@ -1,5 +1,6 @@
 #include "sys.h"
 
+// FIXME: replace with our version...
 QString Sys::getSystemInfo()
 {
 	QSysInfo::WinVersion version = QSysInfo::windowsVersion();
@@ -48,3 +49,36 @@ QString Sys::getSystemInfo()
 	return os;
 }
 
+#include <windows.h>
+
+uint64_t Sys::getSystemRam()
+{
+	MEMORYSTATUSEX status;
+	status.dwLength = sizeof(status);
+	GlobalMemoryStatusEx( &status );
+	// bytes
+	return (uint64_t)status.ullTotalPhys;
+}
+
+bool Sys::isSystem64bit()
+{
+#if defined(_WIN64)
+	return true;  // 64-bit programs run only on Win64
+#elif defined(_WIN32)
+	// 32-bit programs run on both 32-bit and 64-bit Windows
+	// so must sniff
+	BOOL f64 = false;
+	return IsWow64Process(GetCurrentProcess(), &f64) && f64;
+#else
+	// it's some other kind of system...
+	return false;
+#endif
+}
+
+bool Sys::isCPU64bit()
+{
+	SYSTEM_INFO info;
+	GetNativeSystemInfo(&info);
+	auto arch = info.wProcessorArchitecture;
+	return arch == PROCESSOR_ARCHITECTURE_AMD64 || arch == PROCESSOR_ARCHITECTURE_IA64;
+}