1 files changed, 125 insertions, 0 deletions
diff --git a/windows/driverlogic/src/version.cpp b/windows/driverlogic/src/version.cpp
new file mode 100644
index 0000000000..d7394e224b
--- /dev/null
+++ b/windows/driverlogic/src/version.cpp
@@ -0,0 +1,125 @@
+#include "stdafx.h"
+#include "version.h"
+#include "device.h"
+#include <setupapi.h>
+#include <initguid.h>
+#include <devpkey.h>
+#include <libcommon/string.h>
+#include <libcommon/memory.h>
+#include <stdexcept>
+
+DRIVER_UPGRADE_STATUS
+EvaluateDriverUpgrade
+(
+	const std::wstring &existingVersion,
+	const std::wstring &proposedVersion
+)
+{
+	//
+	// "x.y.z.a"
+	//
+
+	using namespace common::string;
+
+	auto et = Tokenize(existingVersion, L".");
+	auto pt = Tokenize(proposedVersion, L".");
+
+	auto items = min(et.size(), pt.size());
+
+	for (auto index = 0; index < items; ++index)
+	{
+		auto ev = wcstoul(et[index].c_str(), nullptr, 10);
+		auto pv = wcstoul(pt[index].c_str(), nullptr, 10);
+
+		if (pv > ev)
+		{
+			return DRIVER_UPGRADE_STATUS::WOULD_UPGRADE;
+		}
+
+		if (ev > pv)
+		{
+			return DRIVER_UPGRADE_STATUS::WOULD_DOWNGRADE;
+		}
+	}
+
+	if (pt.size() > et.size())
+	{
+		return DRIVER_UPGRADE_STATUS::WOULD_UPGRADE;
+	}
+
+	if (et.size() > pt.size())
+	{
+		return DRIVER_UPGRADE_STATUS::WOULD_DOWNGRADE;
+	}
+
+	return DRIVER_UPGRADE_STATUS::WOULD_INSTALL_SAME_VERSION;
+}
+
+std::wstring
+InfGetDriverVersion
+(
+	const std::wstring &filePath
+)
+{
+	auto infHandle = SetupOpenInfFileW(filePath.c_str(), nullptr, INF_STYLE_WIN4, nullptr);
+
+	if (infHandle == INVALID_HANDLE_VALUE)
+	{
+		throw std::runtime_error("SetupOpenInfFileW()");
+	}
+
+	common::memory::ScopeDestructor dtor;
+
+	dtor += [infHandle]()
+	{
+		SetupCloseInfFile(infHandle);
+	};
+
+	INFCONTEXT infContext { 0 };
+
+	auto status = SetupFindFirstLineW(infHandle, L"Version", L"DriverVer", &infContext);
+
+	if (status == FALSE)
+	{
+		throw std::runtime_error("SetupFindFirstLineW()");
+	}
+
+	DWORD requiredSize;
+
+	//
+	// This is a multi-value key.
+	// 0 = key, 1 = driver date
+	//
+	const DWORD VersionFieldIndex = 2;
+
+	status = SetupGetStringFieldW(&infContext, VersionFieldIndex, nullptr, 0, &requiredSize);
+
+	if (status == FALSE || requiredSize < 2)
+	{
+		throw std::runtime_error("SetupGetStringFieldW()");
+	}
+
+	std::vector<wchar_t> buffer(requiredSize);
+
+	status = SetupGetStringFieldW(&infContext, VersionFieldIndex,
+		&buffer[0], static_cast<DWORD>(buffer.size()), nullptr);
+
+	if (status == FALSE)
+	{
+		throw std::runtime_error("SetupGetStringFieldW()");
+	}
+
+	// Remove null terminator.
+	buffer.resize(requiredSize - 1);
+
+	return buffer.data();
+}
+
+std::wstring
+GetDriverVersion
+(
+	const EnumeratedDevice &device
+)
+{
+	return GetDeviceStringProperty(device.deviceInfoSet, device.deviceInfo, &DEVPKEY_Device_DriverVersion);
+}