HMCLauncher: verify if JVM version is between 8 and 10

HMCLauncher/HMCL/HMCL.vcxproj

@@ -24,6 +24,7 @@
     <Keyword>Win32Proj</Keyword>
     <RootNamespace>HMCL</RootNamespace>
     <WindowsTargetPlatformVersion>7.0</WindowsTargetPlatformVersion>
+    <ProjectName>HMCLauncher</ProjectName>
   </PropertyGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.Default.props" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|Win32'" Label="Configuration">
@@ -94,6 +95,7 @@
     <Link>
       <SubSystem>Windows</SubSystem>
       <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>version.lib;kernel32.lib;user32.lib;gdi32.lib;winspool.lib;comdlg32.lib;advapi32.lib;shell32.lib;ole32.lib;oleaut32.lib;uuid.lib;odbc32.lib;odbccp32.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Debug|x64'">
@@ -129,6 +131,7 @@
       <EnableCOMDATFolding>true</EnableCOMDATFolding>
       <OptimizeReferences>true</OptimizeReferences>
       <GenerateDebugInformation>true</GenerateDebugInformation>
+      <AdditionalDependencies>version.lib;%(AdditionalDependencies)</AdditionalDependencies>
     </Link>
   </ItemDefinitionGroup>
   <ItemDefinitionGroup Condition="'$(Configuration)|$(Platform)'=='Release|x64'">
@@ -153,6 +156,7 @@
   </ItemDefinitionGroup>
   <ItemGroup>
     <ClInclude Include="java.h" />
+    <ClInclude Include="lang.h" />
     <ClInclude Include="main.h" />
     <ClInclude Include="os.h" />
     <ClInclude Include="Resource.h" />

HMCLauncher/HMCL/HMCL.vcxproj.filters

@@ -36,6 +36,9 @@
     <ClInclude Include="os.h">
       <Filter>头文件</Filter>
     </ClInclude>
+    <ClInclude Include="lang.h">
+      <Filter>头文件</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="stdafx.cpp">

HMCLauncher/HMCL/Version.cpp

@@ -1,7 +1,9 @@
 #include "stdafx.h"
 #include "Version.h"
 
-Version::Version(const std::wstring & rawString)
+using namespace std;
+
+Version::Version(const wstring & rawString)
 {
 	int idx = 0;
 	ver[0] = ver[1] = ver[2] = ver[3] = 0;

HMCLauncher/HMCL/Version.h

@@ -9,6 +9,18 @@ public:
 
 	Version(const std::wstring &rawString);
 
+	template <typename T>
+	Version(std::initializer_list<T> ver_list)
+	{
+		int i = 0;
+		for (const auto &data : ver_list)
+		{
+			if (i >= 4)
+				break;
+			ver[i++] = data;
+		}
+	}
+
 	bool operator<(const Version &other) const
 	{
 		for (int i = 0; i < 4; ++i)
@@ -16,5 +28,13 @@ public:
 				return ver[i] < other.ver[i];
 		return false;
 	}
+
+	bool operator<=(const Version &other) const
+	{
+		for (int i = 0; i < 4; ++i)
+			if (ver[i] != other.ver[i])
+				return ver[i] < other.ver[i];
+		return true;
+	}
 };
 

HMCLauncher/HMCL/java.cpp

@@ -58,7 +58,7 @@ bool FindJavaByRegistryKey(HKEY rootKey, LPCWSTR subKey, std::wstring & path)
 		{
 			if (Version(javaVer) < JAVA_8)
 				oldJavaFound = true;
-			else if (!(Version(javaVer) < JAVA_11))
+			else if (JAVA_11 <= Version(javaVer))
 				newJavaFound = true;
 			else
 				flag = true;

HMCLauncher/HMCL/lang.h

@@ -0,0 +1,4 @@
+#pragma once
+
+#define ERROR_PROMPT L"Java installation cannot be found in this computer, please download it from https://java.com \n" \
+L"未能在这台电脑上找到Java 8~Java 10，请从 https://java.com 下载安装Java"

HMCLauncher/HMCL/main.cpp

@@ -2,16 +2,30 @@
 #include "main.h"
 #include "os.h"
 #include "java.h"
+#include "lang.h"
 
 using namespace std;
 
+Version J8(TEXT("8")), J11(TEXT("11"));
 
-void LaunchJVM(const wstring &javaPath, const wstring &jarPath)
+void RawLaunchJVM(const wstring &javaPath, const wstring &jarPath)
 {
 	if (MyCreateProcess(L"\"" + javaPath + L"\" -XX:MinHeapFreeRatio=5 -XX:MaxHeapFreeRatio=15 -jar \"" + jarPath + L"\""))
 		exit(EXIT_SUCCESS);
 }
 
+void LaunchJVM(const wstring &javaPath, const wstring &jarPath)
+{
+	Version javaVersion(L"");
+	if (!MyGetFileVersionInfo(javaPath, javaVersion))
+		return;
+
+	if (J8 <= javaVersion && javaVersion < J11)
+	{
+		RawLaunchJVM(javaPath, jarPath);
+	}
+}
+
 int APIENTRY wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmdLine, int nCmdShow)
 {
 	wstring path, exeName;
@@ -37,9 +51,6 @@ int APIENTRY wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmd
 	if (FindJava(path))
 		LaunchJVM(path + L"\\bin\\javaw.exe", exeName);
 
-	// Try java in PATH
-	LaunchJVM(L"javaw", exeName);
-
 	// Or we try to search Java in C:\Program Files.
 	{
 		WIN32_FIND_DATA data;
@@ -72,8 +83,10 @@ int APIENTRY wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPWSTR lpCmd
 		}
 	}
 
-	MessageBox(NULL, L"Java installation cannot be found in this computer, please download it from https://java.com \n"
+	// Try java in PATH
-		L"未能在这台电脑上找到Java 8~Java 10，请从 https://java.com 下载安装Java", L"Error", MB_ICONERROR | MB_OK);
+	RawLaunchJVM(L"javaw", exeName);
+
+	MessageBox(NULL, ERROR_PROMPT, L"Error", MB_ICONERROR | MB_OK);
 	ShellExecute(0, 0, L"https://java.com/", 0, 0, SW_SHOW);
 	return 1;
 }

HMCLauncher/HMCL/os.cpp

@@ -106,3 +106,36 @@ bool GetArch(bool & is64Bit)
 #error _WIN64 and _WIN32 are both undefined.
 #endif
 }
+
+bool MyGetFileVersionInfo(const std::wstring & filePath, Version &version)
+{
+	DWORD verHandle = 0;
+	UINT size = 0;
+	LPBYTE lpBuffer = NULL;
+	VS_FIXEDFILEINFO *pFileInfo;
+	DWORD dwSize = GetFileVersionInfoSize(filePath.c_str(), NULL);
+
+	if (!dwSize)
+		return false;
+
+	LPBYTE data = new BYTE[dwSize];
+	if (!GetFileVersionInfo(filePath.c_str(), 0, dwSize, data))
+	{
+		delete[] data;
+		return false;
+	}
+
+	if (!VerQueryValue(data, TEXT("\\"), (LPVOID*)&pFileInfo, &size))
+	{
+		delete[] data;
+		return false;
+	}
+
+	version = Version{
+		(pFileInfo->dwFileVersionMS >> 16) & 0xFFFF,
+		(pFileInfo->dwFileVersionMS >> 0) & 0xFFFF,
+		(pFileInfo->dwFileVersionLS >> 16) & 0xFFFF,
+		(pFileInfo->dwFileVersionLS >> 0) & 0xFFFF
+	};
+	return true;
+}

HMCLauncher/HMCL/os.h

@@ -1,6 +1,7 @@
 #pragma once
 #include <string>
 #include <windows.h>
+#include "Version.h"
 
 const int MAX_KEY_LENGTH = 255;
 const int MAX_VALUE_NAME = 16383;
@@ -20,4 +21,6 @@ bool MyCreateProcess(const std::wstring &command);
 // Check if file lpPath exists.
 bool FindFirstFileExists(LPCWSTR lpPath, DWORD dwFilter);
 
-bool GetArch(bool &is64Bit);
+bool GetArch(bool &is64Bit);
+
+bool MyGetFileVersionInfo(const std::wstring &filePath, Version &version);