Add package path/filepath; Add os.stat for windows (TODO: unix)

core/os/dir_windows.odin

@@ -0,0 +1,105 @@
+package os
+
+import win32 "core:sys/windows"
+import "core:strings"
+import "core:time"
+
+read_dir :: proc(fd: Handle, n: int) -> (fi: []File_Info, err: Errno) {
+	find_data_to_file_info :: proc(base_path: string, d: ^win32.WIN32_FIND_DATAW) -> (fi: File_Info) {
+		// Ignore "." and ".."
+		if d.cFileName[0] == '.' && d.cFileName[1] == 0 {
+			return;
+		}
+		if d.cFileName[0] == '.' && d.cFileName[1] == '.' && d.cFileName[2] == 0 {
+			return;
+		}
+		path := strings.concatenate({base_path, `\`, win32.utf16_to_utf8(d.cFileName[:])});
+		fi.fullpath = path;
+		fi.name = basename(path);
+		fi.size = i64(d.nFileSizeHigh)<<32 + i64(d.nFileSizeLow);
+
+		if d.dwFileAttributes & win32.FILE_ATTRIBUTE_READONLY != 0 {
+			fi.mode |= 0o444;
+		} else {
+			fi.mode |= 0o666;
+		}
+
+		is_sym := false;
+		if d.dwFileAttributes & win32.FILE_ATTRIBUTE_REPARSE_Point == 0 {
+			is_sym = false;
+		} else {
+			is_sym = d.dwReserved0 == win32.IO_REPARSE_TAG_SYMLINK || d.dwReserved0 == win32.IO_REPARSE_TAG_MOUNT_POINT;
+		}
+
+		if is_sym {
+			fi.mode |= File_Mode_Sym_Link;
+		} else {
+			if d.dwFileAttributes & win32.FILE_ATTRIBUTE_DIRECTORY != 0 {
+				fi.mode |= 0o111 | File_Mode_Dir;
+			}
+
+			// fi.mode |= file_type_mode(h);
+		}
+
+		fi.creation_time     = time.unix(0, win32.FILETIME_as_unix_nanoseconds(d.ftCreationTime));
+		fi.modification_time = time.unix(0, win32.FILETIME_as_unix_nanoseconds(d.ftLastWriteTime));
+		fi.access_time       = time.unix(0, win32.FILETIME_as_unix_nanoseconds(d.ftLastAccessTime));
+
+		fi.is_dir = fi.mode & File_Mode_Dir != 0;
+		return;
+	}
+
+	if fd == 0 {
+		return nil, ERROR_INVALID_HANDLE;
+	}
+
+	h := win32.HANDLE(fd);
+
+	dir_fi, _ := stat_from_file_information("", h);
+	if !dir_fi.is_dir {
+		return nil, ERROR_FILE_IS_NOT_DIR;
+	}
+
+	n := n;
+	size := n;
+	if n <= 0 {
+		n = -1;
+		size = 100;
+	}
+	dfi := make([dynamic]File_Info, 0, size);
+
+	wpath: []u16;
+	wpath, err = cleanpath_from_handle_u16(fd);
+	if len(wpath) == 0 || err != ERROR_NONE {
+		return;
+	}
+	wpath_search := make([]u16, len(wpath)+3, context.temp_allocator);
+	copy(wpath_search, wpath);
+	wpath_search[len(wpath)+0] = '\\';
+	wpath_search[len(wpath)+1] = '*';
+	wpath_search[len(wpath)+2] = 0;
+
+	path := cleanpath_from_buf(wpath);
+
+	find_data := &win32.WIN32_FIND_DATAW{};
+	find_handle := win32.FindFirstFileW(raw_data(wpath_search), find_data);
+	defer win32.FindClose(find_handle);
+	for n != 0 && find_handle != nil {
+		fi: File_Info;
+		fi = find_data_to_file_info(path, find_data);
+		if fi.name != "" {
+			append(&dfi, fi);
+			n -= 1;
+		}
+
+		if !win32.FindNextFileW(find_handle, find_data) {
+			e := Errno(win32.GetLastError());
+			if e == ERROR_NO_MORE_FILES {
+				break;
+			}
+			return dfi[:], e;
+		}
+	}
+
+	return dfi[:], ERROR_NONE;
+}