add missing functions in myfilesystem in Linux/Mac

gframe/myfilesystem.h

@@ -75,6 +75,12 @@ public:
 		return SHFileOperationW(&lpFileOp) == 0;
 	}
 
+	static bool DeleteDir(const char* dir) {
+		wchar_t wdir[1024];
+		BufferIO::DecodeUTF8(dir, wdir);
+		return DeleteDir(wdir);
+	}
+
 	static void TraversalDir(const wchar_t* wpath, const std::function<void(const wchar_t*, bool)>& cb) {
 		wchar_t findstr[1024];
 		wcscpy(findstr, wpath);
@@ -137,6 +143,47 @@ public:
 		return MakeDir(dir);
 	}
 
+	static bool Rename(const wchar_t* woldname, const wchar_t* wnewname) {
+		char oldname[1024];
+		char newname[1024];
+		BufferIO::EncodeUTF8(woldname, oldname);
+		BufferIO::EncodeUTF8(wnewname, newname);
+		return Rename(oldname, newname);
+	}
+
+	static bool Rename(const char* oldname, const char* newname) {
+		return rename(oldname, newname) == 0;
+	}
+
+	static bool DeleteDir(const wchar_t* wdir) {
+		char dir[1024];
+		BufferIO::EncodeUTF8(wdir, dir);
+		return DeleteDir(dir);
+	}
+
+	static bool DeleteDir(const char* dir) {
+		bool success = true;
+		TraversalDir(dir, [dir, &success](const char *name, bool isdir) {
+			if(strcmp(name, ".") == 0 || strcmp(name, "..") == 0)
+				return;
+			char full_path[256];
+			sprintf(full_path, "%s/%s", dir, name);
+			if (isdir)
+			{
+				if(!DeleteDir(full_path))
+					success = false;
+			}
+			else
+			{
+				if(unlink(full_path) != 0)
+					success = false;
+			}
+		});
+		if (rmdir(dir) != 0)
+			success = false;
+		return success;
+	}
+
 	struct file_unit {
 		std::string filename;
 		bool is_dir;
@@ -158,6 +205,8 @@ public:
 			stat(fname, &fileStat);
 			funit.filename = std::string(dirp->d_name);
 			funit.is_dir = S_ISDIR(fileStat.st_mode);
+			if(funit.is_dir && (strcmp(dirp->d_name, ".") == 0 || strcmp(dirp->d_name, "..") == 0))
+				continue;
 			file_list.push_back(funit);
 		}
 		closedir(dir);