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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"
"runtime"
"syscall"
)
func (file *File) readdir(n int) (fi []FileInfo, err error) {
if file == nil {
return nil, syscall.EINVAL
}
if !file.isdir() {
return nil, &PathError{"Readdir", file.name, syscall.ENOTDIR}
}
wantAll := n <= 0
size := n
if wantAll {
n = -1
size = 100
}
fi = make([]FileInfo, 0, size) // Empty with room to grow.
d := &file.dirinfo.data
for n != 0 && !file.dirinfo.isempty {
if file.dirinfo.needdata {
e := file.pfd.FindNextFile(d)
runtime.KeepAlive(file)
if e != nil {
if e == syscall.ERROR_NO_MORE_FILES {
break
} else {
err = &PathError{"FindNextFile", file.name, e}
if !wantAll {
fi = nil
}
return
}
}
}
file.dirinfo.needdata = true
name := syscall.UTF16ToString(d.FileName[0:])
if name == "." || name == ".." { // Useless names
continue
}
f := newFileStatFromWin32finddata(d)
f.name = name
f.path = file.dirinfo.path
f.appendNameToPath = true
n--
fi = append(fi, f)
}
if !wantAll && len(fi) == 0 {
return fi, io.EOF
}
return fi, nil
}
func (file *File) readdirnames(n int) (names []string, err error) {
fis, err := file.Readdir(n)
names = make([]string, len(fis))
for i, fi := range fis {
names[i] = fi.Name()
}
return names, err
}
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