| // Copyright 2009 The Go Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| package os |
| |
| import ( |
| "io" |
| "runtime" |
| "syscall" |
| ) |
| |
| func (file *File) readdir(n int, mode readdirMode) (names []string, dirents []DirEntry, infos []FileInfo, err error) { |
| // If this file has no dirinfo, create one. |
| needdata := true |
| if file.dirinfo == nil { |
| needdata = false |
| file.dirinfo, err = openDir(file.name) |
| if err != nil { |
| err = &PathError{Op: "readdir", Path: file.name, Err: err} |
| return |
| } |
| } |
| wantAll := n <= 0 |
| if wantAll { |
| n = -1 |
| } |
| d := &file.dirinfo.data |
| for n != 0 && !file.dirinfo.isempty { |
| if needdata { |
| e := syscall.FindNextFile(file.dirinfo.h, d) |
| runtime.KeepAlive(file) |
| if e != nil { |
| if e == syscall.ERROR_NO_MORE_FILES { |
| break |
| } else { |
| err = &PathError{Op: "FindNextFile", Path: file.name, Err: e} |
| return |
| } |
| } |
| } |
| needdata = true |
| name := syscall.UTF16ToString(d.FileName[0:]) |
| if name == "." || name == ".." { // Useless names |
| continue |
| } |
| if mode == readdirName { |
| names = append(names, name) |
| } else { |
| f := newFileStatFromWin32finddata(d) |
| f.name = name |
| f.path = file.dirinfo.path |
| f.appendNameToPath = true |
| if mode == readdirDirEntry { |
| dirents = append(dirents, dirEntry{f}) |
| } else { |
| infos = append(infos, f) |
| } |
| } |
| n-- |
| } |
| if !wantAll && len(names)+len(dirents)+len(infos) == 0 { |
| return nil, nil, nil, io.EOF |
| } |
| return names, dirents, infos, nil |
| } |
| |
| type dirEntry struct { |
| fs *fileStat |
| } |
| |
| func (de dirEntry) Name() string { return de.fs.Name() } |
| func (de dirEntry) IsDir() bool { return de.fs.IsDir() } |
| func (de dirEntry) Type() FileMode { return de.fs.Mode().Type() } |
| func (de dirEntry) Info() (FileInfo, error) { return de.fs, nil } |