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 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  }
    52
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