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Source file src/os/dir_windows.go

Documentation: os

     1  // Copyright 2009 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package os
     6  
     7  import (
     8  	"io"
     9  	"runtime"
    10  	"syscall"
    11  )
    12  
    13  func (file *File) readdir(n int) (fi []FileInfo, err error) {
    14  	if file == nil {
    15  		return nil, syscall.EINVAL
    16  	}
    17  	if !file.isdir() {
    18  		return nil, &PathError{"Readdir", file.name, syscall.ENOTDIR}
    19  	}
    20  	wantAll := n <= 0
    21  	size := n
    22  	if wantAll {
    23  		n = -1
    24  		size = 100
    25  	}
    26  	fi = make([]FileInfo, 0, size) // Empty with room to grow.
    27  	d := &file.dirinfo.data
    28  	for n != 0 && !file.dirinfo.isempty {
    29  		if file.dirinfo.needdata {
    30  			e := file.pfd.FindNextFile(d)
    31  			runtime.KeepAlive(file)
    32  			if e != nil {
    33  				if e == syscall.ERROR_NO_MORE_FILES {
    34  					break
    35  				} else {
    36  					err = &PathError{"FindNextFile", file.name, e}
    37  					if !wantAll {
    38  						fi = nil
    39  					}
    40  					return
    41  				}
    42  			}
    43  		}
    44  		file.dirinfo.needdata = true
    45  		name := syscall.UTF16ToString(d.FileName[0:])
    46  		if name == "." || name == ".." { // Useless names
    47  			continue
    48  		}
    49  		f := newFileStatFromWin32finddata(d)
    50  		f.name = name
    51  		f.path = file.dirinfo.path
    52  		f.appendNameToPath = true
    53  		n--
    54  		fi = append(fi, f)
    55  	}
    56  	if !wantAll && len(fi) == 0 {
    57  		return fi, io.EOF
    58  	}
    59  	return fi, nil
    60  }
    61  
    62  func (file *File) readdirnames(n int) (names []string, err error) {
    63  	fis, err := file.Readdir(n)
    64  	names = make([]string, len(fis))
    65  	for i, fi := range fis {
    66  		names[i] = fi.Name()
    67  	}
    68  	return names, err
    69  }
    70  

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