Added config parser

DDrawCompat/Common/Path.cpp

@@ -1,7 +1,13 @@
 #include <Common/Path.h>
+#include <Dll/Dll.h>
 
 namespace Compat
 {
+	std::filesystem::path getEnvPath(const char* envVar)
+	{
+		return Dll::getEnvVar(envVar);
+	}
+
 	std::filesystem::path getModulePath(HMODULE module)
 	{
 		wchar_t path[MAX_PATH];

DDrawCompat/Common/Path.h

@@ -6,6 +6,7 @@
 
 namespace Compat
 {
+	std::filesystem::path getEnvPath(const char* envVar);
 	std::filesystem::path getModulePath(HMODULE module);
 	std::filesystem::path getSystemPath();
 	bool isEqual(const std::filesystem::path& p1, const std::filesystem::path& p2);

DDrawCompat/Config/Parser.cpp

@@ -0,0 +1,101 @@
+#include <fstream>
+
+#include <Common/Log.h>
+#include <Common/Path.h>
+#include <Config/Parser.h>
+
+namespace
+{
+	void setConfig(const std::string& name, const std::string& value);
+	std::string trim(const std::string& str);
+
+	void loadConfigFile(const std::string& type, const std::filesystem::path& path)
+	{
+		Compat::Log() << "Loading " << type << " config file: " << path.u8string();
+		std::ifstream f(path);
+		if (!f.is_open())
+		{
+			Compat::Log() << "  File not found, skipping";
+			return;
+		}
+
+		unsigned lineNumber = 0;
+		std::string line;
+		while (std::getline(f, line))
+		{
+			try {
+				++lineNumber;
+				auto pos = line.find_first_of(";#");
+				if (pos != std::string::npos)
+				{
+					line.resize(pos);
+				}
+
+				if (line.find_first_not_of(" \t") == std::string::npos)
+				{
+					continue;
+				}
+
+				pos = line.find('=');
+				if (pos == std::string::npos)
+				{
+					throw Config::ParsingError("missing '=' separator");
+				}
+
+				setConfig(trim(line.substr(0, pos)), trim(line.substr(pos + 1)));
+			}
+			catch (const Config::ParsingError& error)
+			{
+				Compat::Log() << "  Line #" << lineNumber << ": " << error.what();
+			}
+		}
+	}
+
+	void setConfig(const std::string& name, const std::string& /*value*/)
+	{
+		if (name.empty())
+		{
+			throw Config::ParsingError("missing setting name before '='");
+		}
+
+		throw Config::ParsingError("unknown setting: '" + name + "'");
+	}
+
+	std::string trim(const std::string& str)
+	{
+		auto result(str);
+		auto pos = str.find_last_not_of(" \t");
+		if (pos != std::string::npos)
+		{
+			result.resize(pos + 1);
+		}
+
+		pos = result.find_first_not_of(" \t");
+		if (pos != std::string::npos)
+		{
+			result = result.substr(pos);
+		}
+		return result;
+	}
+}
+
+namespace Config
+{
+	namespace Parser
+	{
+		void loadAllConfigFiles(const std::filesystem::path& processPath)
+		{
+			loadConfigFile("global", Compat::getEnvPath("PROGRAMDATA") / "DDrawCompat" / "DDrawCompat.ini");
+			loadConfigFile("user", Compat::getEnvPath("LOCALAPPDATA") / "DDrawCompat" / "DDrawCompat.ini");
+			loadConfigFile("directory", Compat::replaceFilename(processPath, "DDrawCompat.ini"));
+
+			auto processConfigPath(processPath);
+			if (Compat::isEqual(processConfigPath.extension(), ".exe"))
+			{
+				processConfigPath.replace_extension();
+			}
+			processConfigPath.replace_filename(L"DDrawCompat-" + processConfigPath.filename().native() + L".ini");
+			loadConfigFile("process", processConfigPath);
+		}
+	}
+}

DDrawCompat/Config/Parser.h

@@ -0,0 +1,18 @@
+#pragma once
+
+#include <filesystem>
+#include <stdexcept>
+
+namespace Config
+{
+	class ParsingError : public std::runtime_error
+	{
+	public:
+		ParsingError(const std::string& error) : runtime_error(error) {}
+	};
+
+	namespace Parser
+	{
+		void loadAllConfigFiles(const std::filesystem::path& processPath);
+	}
+}

DDrawCompat/DDrawCompat.vcxproj

@@ -178,6 +178,7 @@
     <ClInclude Include="Common\ScopedCriticalSection.h" />
     <ClInclude Include="Common\Time.h" />
     <ClInclude Include="Config\Config.h" />
+    <ClInclude Include="Config\Parser.h" />
     <ClInclude Include="D3dDdi\Adapter.h" />
     <ClInclude Include="D3dDdi\AdapterCallbacks.h" />
     <ClInclude Include="D3dDdi\AdapterFuncs.h" />
@@ -271,6 +272,7 @@
     <ClCompile Include="Common\Hook.cpp" />
     <ClCompile Include="Common\Path.cpp" />
     <ClCompile Include="Common\Time.cpp" />
+    <ClCompile Include="Config\Parser.cpp" />
     <ClCompile Include="D3dDdi\Adapter.cpp" />
     <ClCompile Include="D3dDdi\AdapterCallbacks.cpp" />
     <ClCompile Include="D3dDdi\AdapterFuncs.cpp" />

DDrawCompat/DDrawCompat.vcxproj.filters

@@ -79,6 +79,9 @@
     <Filter Include="Source Files\D3dDdi\Log">
       <UniqueIdentifier>{c4d03748-2333-40af-90c7-ae875b07434f}</UniqueIdentifier>
     </Filter>
+    <Filter Include="Source Files\Config">
+      <UniqueIdentifier>{9d313de7-b8ca-49d0-84d2-217f2818d9d3}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Gdi\Gdi.h">
@@ -390,6 +393,9 @@
     <ClInclude Include="Common\Path.h">
       <Filter>Header Files\Common</Filter>
     </ClInclude>
+    <ClInclude Include="Config\Parser.h">
+      <Filter>Header Files\Config</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Gdi\Gdi.cpp">
@@ -611,6 +617,9 @@
     <ClCompile Include="Common\Path.cpp">
       <Filter>Source Files\Common</Filter>
     </ClCompile>
+    <ClCompile Include="Config\Parser.cpp">
+      <Filter>Source Files\Config</Filter>
+    </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ResourceCompile Include="DDrawCompat.rc">

DDrawCompat/Dll/Dll.cpp

@@ -20,6 +20,18 @@ namespace Dll
 		return thread;
 	}
 
+	std::string getEnvVar(const char* var)
+	{
+		const DWORD size = GetEnvironmentVariable(var, nullptr, 0);
+		std::string value(size, 0);
+		if (!value.empty())
+		{
+			GetEnvironmentVariable(var, &value.front(), size);
+			value.pop_back();
+		}
+		return value;
+	}
+
 	void pinModule(HMODULE module)
 	{
 		HMODULE dummy = nullptr;

DDrawCompat/Dll/Dll.h

@@ -1,5 +1,7 @@
 #pragma once
 
+#include <string>
+
 #include <Windows.h>
 
 #define VISIT_PUBLIC_DDRAW_PROCS(visit) \
@@ -68,6 +70,7 @@ namespace Dll
 	};
 
 	HANDLE createThread(unsigned(__stdcall* threadProc)(void*), unsigned int* threadId, int priority, unsigned initFlags = 0);
+	std::string getEnvVar(const char* var);
 	void pinModule(HMODULE module);
 	void pinModule(LPCSTR moduleName);
 	void pinModule(LPCWSTR moduleName);

DDrawCompat/Dll/DllMain.cpp

@@ -9,6 +9,7 @@
 #include <Common/Log.h>
 #include <Common/Path.h>
 #include <Common/Time.h>
+#include <Config/Parser.h>
 #include <D3dDdi/Hooks.h>
 #include <DDraw/DirectDraw.h>
 #include <DDraw/Hooks.h>
@@ -111,14 +112,7 @@ namespace
 
 	void printEnvironmentVariable(const char* var)
 	{
-		const DWORD size = GetEnvironmentVariable(var, nullptr, 0);
-		std::string value(size, 0);
-		if (!value.empty())
-		{
-			GetEnvironmentVariable(var, &value.front(), size);
-			value.pop_back();
-		}
-		Compat::Log() << "Environment variable " << var << " = \"" << value << '"';
+		Compat::Log() << "Environment variable " << var << " = \"" << Dll::getEnvVar(var) << '"';
 	}
 
 	void setDpiAwareness()
@@ -175,11 +169,13 @@ BOOL WINAPI DllMain(HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved)
 
 		auto processPath(Compat::getModulePath(nullptr));
 		Compat::Log::initLogging(processPath);
-
 		Compat::Log() << "Process path: " << processPath.u8string();
-		printEnvironmentVariable("__COMPAT_LAYER");
+
 		auto currentDllPath(Compat::getModulePath(hinstDLL));
 		Compat::Log() << "Loading DDrawCompat " << (lpvReserved ? "statically" : "dynamically") << " from " << currentDllPath.u8string();
+		printEnvironmentVariable("__COMPAT_LAYER");
+
+		Config::Parser::loadAllConfigFiles(processPath);
 
 		auto systemPath(Compat::getSystemPath());
 		if (Compat::isEqual(currentDllPath.parent_path(), systemPath))