libgo/go/net/file.go

   1 // Copyright 2015 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 net
   6
   7 import "os"
   8
   9 // BUG(mikio): On JS, NaCl and Windows, the FileConn, FileListener and
  10 // FilePacketConn functions are not implemented.
  11
  12 type fileAddr string
  13
  14 func (fileAddr) Network() string  { return "file+net" }
  15 func (f fileAddr) String() string { return string(f) }
  16
  17 // FileConn returns a copy of the network connection corresponding to
  18 // the open file f.
  19 // It is the caller's responsibility to close f when finished.
  20 // Closing c does not affect f, and closing f does not affect c.
  21 func FileConn(f *os.File) (c Conn, err error) {
  22         c, err = fileConn(f)
  23         if err != nil {
  24                 err = &OpError{Op: "file", Net: "file+net", Source: nil, Addr: fileAddr(f.Name()), Err: err}
  25         }
  26         return
  27 }
  28
  29 // FileListener returns a copy of the network listener corresponding
  30 // to the open file f.
  31 // It is the caller's responsibility to close ln when finished.
  32 // Closing ln does not affect f, and closing f does not affect ln.
  33 func FileListener(f *os.File) (ln Listener, err error) {
  34         ln, err = fileListener(f)
  35         if err != nil {
  36                 err = &OpError{Op: "file", Net: "file+net", Source: nil, Addr: fileAddr(f.Name()), Err: err}
  37         }
  38         return
  39 }
  40
  41 // FilePacketConn returns a copy of the packet network connection
  42 // corresponding to the open file f.
  43 // It is the caller's responsibility to close f when finished.
  44 // Closing c does not affect f, and closing f does not affect c.
  45 func FilePacketConn(f *os.File) (c PacketConn, err error) {
  46         c, err = filePacketConn(f)
  47         if err != nil {
  48                 err = &OpError{Op: "file", Net: "file+net", Source: nil, Addr: fileAddr(f.Name()), Err: err}
  49         }
  50         return
  51 }