add Windows compliant implementation of XDG Base Directory Specification

Foundation/include/Poco/Path_WIN32.h

@@ -32,7 +32,12 @@ class Foundation_API PathImpl
 public:
 	static std::string currentImpl();
 	static std::string homeImpl();
+	static std::string configHomeImpl();
+	static std::string dataHomeImpl();
+	static std::string cacheHomeImpl();
+	static std::string tempHomeImpl();
 	static std::string tempImpl();
+	static std::string configImpl();
 	static std::string nullImpl();
 	static std::string systemImpl();
 	static std::string expandImpl(const std::string& path);

Foundation/include/Poco/Path_WIN32U.h

@@ -32,7 +32,12 @@ class Foundation_API PathImpl
 public:
 	static std::string currentImpl();
 	static std::string homeImpl();
+	static std::string configHomeImpl();
+	static std::string dataHomeImpl();
+	static std::string cacheHomeImpl();
+	static std::string tempHomeImpl();
 	static std::string tempImpl();
+	static std::string configImpl();
 	static std::string nullImpl();
 	static std::string systemImpl();
 	static std::string expandImpl(const std::string& path);

Foundation/src/Path.cpp

@@ -597,7 +597,7 @@ std::string Path::home()
 	
 std::string Path::configHome()
 {
-#if defined(POCO_OS_FAMILY_UNIX)
+#if defined(POCO_OS_FAMILY_UNIX) || defined(POCO_OS_FAMILY_WINDOWS)
 	return PathImpl::configHomeImpl();
 #else
 	return PathImpl::homeImpl();
@@ -607,7 +607,7 @@ std::string Path::configHome()
 	
 std::string Path::dataHome()
 {
-#if defined(POCO_OS_FAMILY_UNIX)
+#if defined(POCO_OS_FAMILY_UNIX) || defined(POCO_OS_FAMILY_WINDOWS)
 	return PathImpl::dataHomeImpl();
 #else
 	return PathImpl::homeImpl();
@@ -617,7 +617,7 @@ std::string Path::dataHome()
 	
 std::string Path::tempHome()
 {
-#if defined(POCO_OS_FAMILY_UNIX)
+#if defined(POCO_OS_FAMILY_UNIX) || defined(POCO_OS_FAMILY_WINDOWS)
 	return PathImpl::tempHomeImpl();
 #else
 	return PathImpl::tempImpl();
@@ -627,7 +627,7 @@ std::string Path::tempHome()
 	
 std::string Path::cacheHome()
 {
-#if defined(POCO_OS_FAMILY_UNIX)
+#if defined(POCO_OS_FAMILY_UNIX) || defined(POCO_OS_FAMILY_WINDOWS)
 	return PathImpl::cacheHomeImpl();
 #else
 	return PathImpl::homeImpl();
@@ -643,7 +643,7 @@ std::string Path::temp()
 	
 std::string Path::config()
 {
-#if defined(POCO_OS_FAMILY_UNIX)
+#if defined(POCO_OS_FAMILY_UNIX) || defined(POCO_OS_FAMILY_WINDOWS)
 	return PathImpl::configImpl();
 #else
 	return PathImpl::currentImpl();

Foundation/src/Path_WIN32.cpp

@@ -74,6 +74,59 @@ std::string PathImpl::homeImpl()
 }
 
 
+std::string PathImpl::configHomeImpl()
+{
+	std::string result;
+
+	// if APPDATA environment variable not exist, return home directory instead
+	try
+	{
+		result = EnvironmentImpl::getImpl("APPDATA");
+	}
+	catch (NotFoundException&)
+	{
+		result = homeImpl();
+	}
+
+	std::string::size_type n = result.size();
+	if (n > 0 && result[n - 1] != '\\')
+		result.append("\\");
+	return result;
+}
+
+
+std::string PathImpl::dataHomeImpl()
+{
+	std::string result;
+
+	// if LOCALAPPDATA environment variable not exist, return config home instead
+	try
+	{
+		result = EnvironmentImpl::getImpl("LOCALAPPDATA");
+	}
+	catch (NotFoundException&)
+	{
+		result = configHomeImpl();
+	}
+
+	std::string::size_type n = result.size();
+	if (n > 0 && result[n - 1] != '\\')
+		result.append("\\");
+	return result;
+}
+
+
+std::string PathImpl::cacheHomeImpl()
+{
+	return tempImpl();
+}
+
+
+std::string PathImpl::tempHomeImpl()
+{
+	return tempImpl();
+}
+
 std::string PathImpl::tempImpl()
 {
 	char buffer[MAX_PATH];
@@ -91,6 +144,26 @@ std::string PathImpl::tempImpl()
 }
 
 
+std::string PathImpl::configImpl()
+{
+	std::string result;
+
+	// if PROGRAMDATA environment variable not exist, return system directory instead
+	try
+	{
+		result = EnvironmentImpl::getImpl("PROGRAMDATA");
+	}
+	catch (NotFoundException&)
+	{
+		result = systemImpl();
+	}
+
+	std::string::size_type n = result.size();
+	if (n > 0 && result[n - 1] != '\\')
+		result.append("\\");
+	return result;
+}
+
 std::string PathImpl::nullImpl()
 {
 	return "NUL:";

Foundation/src/Path_WIN32U.cpp

@@ -84,6 +84,59 @@ std::string PathImpl::homeImpl()
 }
 
 
+std::string PathImpl::configHomeImpl()
+{
+	std::string result;
+
+	// if APPDATA environment variable no exist, return home directory instead
+	try
+	{
+		result = EnvironmentImpl::getImpl("APPDATA");
+	}
+	catch (NotFoundException&)
+	{
+		result = homeImpl();
+	}
+
+	std::string::size_type n = result.size();
+	if (n > 0 && result[n - 1] != '\\')
+		result.append("\\");
+	return result;
+}
+
+
+std::string PathImpl::dataHomeImpl()
+{
+	std::string result;
+
+	// if LOCALAPPDATA environment variable no exist, return config home instead
+	try
+	{
+		result = EnvironmentImpl::getImpl("LOCALAPPDATA");
+	}
+	catch (NotFoundException&)
+	{
+		result = configHomeImpl();
+	}
+
+	std::string::size_type n = result.size();
+	if (n > 0 && result[n - 1] != '\\')
+		result.append("\\");
+	return result;
+}
+
+
+std::string PathImpl::cacheHomeImpl()
+{
+	return tempImpl();
+}
+
+
+std::string PathImpl::tempHomeImpl()
+{
+	return tempImpl();
+}
+
 std::string PathImpl::tempImpl()
 {
 	Buffer<wchar_t> buffer(MAX_PATH_LEN);
@@ -102,6 +155,26 @@ std::string PathImpl::tempImpl()
 }
 
 
+std::string PathImpl::configImpl()
+{
+	std::string result;
+
+	// if PROGRAMDATA environment variable not exist, return system directory instead
+	try
+	{
+		result = EnvironmentImpl::getImpl("PROGRAMDATA");
+	}
+	catch (NotFoundException&)
+	{
+		result = systemImpl();
+	}
+
+	std::string::size_type n = result.size();
+	if (n > 0 && result[n - 1] != '\\')
+		result.append("\\");
+	return result;
+}
+
 std::string PathImpl::nullImpl()
 {
 	return "NUL:";