add func to path manager. fix bitmap handler. add general bitmap handler getter

LibCmo/CK2/CKTypes.hpp

@@ -366,6 +366,55 @@ namespace LibCmo::CK2 {
 		}
 	};
 
+	/**
+	 * @brief Storage class for filename extensions
+	*/
+	class CKFileExtension {
+	public:
+		CKFileExtension() : m_Data() {
+			std::memset(m_Data, 0, c_DataLen);
+		}
+		CKFileExtension(CKSTRING s) : CKFileExtension() {
+			SetExt(s);
+		}
+		CKFileExtension(const CKFileExtension& rhs) : CKFileExtension() {
+			std::memcpy(m_Data, rhs.m_Data, c_DataLen);
+		}
+		CKFileExtension(CKFileExtension&& rhs) : CKFileExtension() {
+			std::memmove(m_Data, rhs.m_Data, c_DataLen);
+			std::memset(rhs.m_Data, 0, c_DataLen);
+		}
+		CKFileExtension& operator=(const CKFileExtension& rhs) {
+			std::memcpy(m_Data, rhs.m_Data, c_DataLen);
+		}
+		CKFileExtension& operator=(CKFileExtension&& rhs) {
+			std::memmove(m_Data, rhs.m_Data, c_DataLen);
+			std::memset(rhs.m_Data, 0, c_DataLen);
+		}
+
+		void SetExt(CKSTRING s) {
+			if (s == nullptr) {
+				m_Data[0] = '\0';
+			} else {
+				if (s[0] == '.') ++s;	// skip dot
+				size_t len = std::strlen(s);
+				if (len > (c_DataLen - 1)) len = c_DataLen - 1;
+				std::memcpy(m_Data, s, len);
+			}
+		}
+
+		CKSTRING GetExt() const {
+			return m_Data;
+		}
+
+		bool operator==(const CKFileExtension& rhs) const {
+			return CKStrEqualI(m_Data, rhs.m_Data);
+		}
+
+	protected:
+		static const size_t c_DataLen = 4u;
+		CKCHAR m_Data[c_DataLen];
+	};
 	
 	/**
 	 * The struct describe the bitmap handler's infomation,
@@ -374,32 +423,16 @@ namespace LibCmo::CK2 {
 	 * such as jpeg compress level and etc. But currently there are no
 	 * such parameters.
 	*/
-	struct CKBitmapProperties {
+	class CKBitmapProperties {
+	public:
 		CKBitmapProperties() :
-			m_ReaderGuid(), m_Ext(3, '\0') {}
-		CKBitmapProperties(CKGUID& guid, const char* ext) :
-			m_ReaderGuid(guid), m_Ext(3, '\0') {
-			SetExt(ext);
-		}
+			m_ReaderGuid(), m_Ext() {}
+		CKBitmapProperties(const CKGUID& guid, CKSTRING ext) :
+			m_ReaderGuid(guid), m_Ext(ext) {}
 		LIBCMO_DEFAULT_COPY_MOVE(CKBitmapProperties);
 
-		void SetExt(const char* s) {
-			if (s == nullptr) {
-				m_Ext[0] = '\0';
-			} else {
-				if (s[0] == '.') ++s;	// skip dot
-				size_t len = std::strlen(s);
-				if (len > m_Ext.size()) len = m_Ext.size();
-				std::memcpy(m_Ext.data(), s, len);
-			}
-		}
-
-		CKSTRING ExtToCKSTRING() {
-			return m_Ext.c_str();
-		}
-
 		CKGUID m_ReaderGuid; /**< CKGUID that uniquely identifies the reader that created this properties structure */
-		std::string m_Ext; /**< File Extension of the image being described by this structure */
+		CKFileExtension m_Ext; /**< File Extension of the image being described by this structure */
 	};