// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package os
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import (
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"io"
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"runtime"
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"syscall"
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)
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func (file *File) readdir(n int) (fi []FileInfo, err error) {
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if file == nil {
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return nil, syscall.EINVAL
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}
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if !file.isdir() {
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return nil, &PathError{"Readdir", file.name, syscall.ENOTDIR}
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}
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wantAll := n <= 0
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size := n
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if wantAll {
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n = -1
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size = 100
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}
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fi = make([]FileInfo, 0, size) // Empty with room to grow.
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d := &file.dirinfo.data
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for n != 0 && !file.dirinfo.isempty {
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if file.dirinfo.needdata {
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e := file.pfd.FindNextFile(d)
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runtime.KeepAlive(file)
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if e != nil {
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if e == syscall.ERROR_NO_MORE_FILES {
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break
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} else {
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err = &PathError{"FindNextFile", file.name, e}
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if !wantAll {
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fi = nil
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}
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return
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}
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}
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}
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file.dirinfo.needdata = true
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name := syscall.UTF16ToString(d.FileName[0:])
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if name == "." || name == ".." { // Useless names
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continue
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}
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f := newFileStatFromWin32finddata(d)
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f.name = name
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f.path = file.dirinfo.path
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f.appendNameToPath = true
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n--
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fi = append(fi, f)
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}
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if !wantAll && len(fi) == 0 {
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return fi, io.EOF
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}
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return fi, nil
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}
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func (file *File) readdirnames(n int) (names []string, err error) {
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fis, err := file.Readdir(n)
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names = make([]string, len(fis))
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for i, fi := range fis {
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names[i] = fi.Name()
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}
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return names, err
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}
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