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// 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"
"io/fs"
"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 }
func (de dirEntry) String() string {
return fs.FormatDirEntry(de)
}
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