1  /* Output stream referring to a file descriptor.
       2     Copyright (C) 2006, 2020 Free Software Foundation, Inc.
       3     Written by Bruno Haible <bruno@clisp.org>, 2006.
       4  
       5     This program is free software: you can redistribute it and/or modify
       6     it under the terms of the GNU General Public License as published by
       7     the Free Software Foundation; either version 3 of the License, or
       8     (at your option) any later version.
       9  
      10     This program is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      13     GNU General Public License for more details.
      14  
      15     You should have received a copy of the GNU General Public License
      16     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
      17  
      18  #ifndef _FD_OSTREAM_H
      19  #define _FD_OSTREAM_H
      20  
      21  #include <stdbool.h>
      22  
      23  #include "ostream.h"
      24  
      25  
      26  struct fd_ostream : struct ostream
      27  {
      28  methods:
      29    /* Accessors.  */
      30    int          get_descriptor (fd_ostream_t stream);
      31    const char * get_filename (fd_ostream_t stream);
      32    bool         is_buffered (fd_ostream_t stream);
      33  };
      34  
      35  
      36  #ifdef __cplusplus
      37  extern "C" {
      38  #endif
      39  
      40  
      41  /* Create an output stream referring to the file descriptor FD.
      42     FILENAME is used only for error messages.
      43     Note that the resulting stream must be closed before FD can be closed.  */
      44  extern fd_ostream_t fd_ostream_create (int fd, const char *filename,
      45                                         bool buffered);
      46  
      47  
      48  /* Test whether a given output stream is a fd_ostream.  */
      49  extern bool is_instance_of_fd_ostream (ostream_t stream);
      50  
      51  
      52  #ifdef __cplusplus
      53  }
      54  #endif
      55  
      56  #endif /* _FD_OSTREAM_H */