Line data    Source code

       1             : /* funopen.c - Replacement for funopen.
       2             :    Copyright (C) 2004 g10 Code GmbH
       3             : 
       4             :    This file is part of GPGME
       5             : 
       6             :    GPGME is free software; you can redistribute it and/or modify it
       7             :    under the terms of the GNU Lesser General Public License as
       8             :    published by the Free Software Foundation; either version 2.1 of
       9             :    the License, or (at your option) any later version.
      10             : 
      11             :    GPGME is distributed in the hope that it will be useful, but
      12             :    WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :    Lesser General Public License for more details.
      15             : 
      16             :    You should have received a copy of the GNU Lesser General Public
      17             :    License along with this program; if not, write to the Free Software
      18             :    Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
      19             :    02111-1307, USA.  */
      20             : 
      21             : #ifdef HAVE_CONFIG_H
      22             : #include <config.h>
      23             : #endif
      24             : 
      25             : #include <stdio.h>
      26             : 
      27             : 
      28             : /* Replacement for the *BSD function:
      29             : 
      30             :   FILE *funopen (void *cookie,
      31             :                  int (*readfn)(void *, char *, int),
      32             :                  int (*writefn)(void *, const char *, int),
      33             :                  fpos_t (*seekfn)(void *, fpos_t, int),
      34             :                  int (*closefn)(void *));
      35             : 
      36             :   The functions to provide my either be NULL if not required or
      37             :   similar to the unistd function with the exception of using the
      38             :   cookie instead of the file descriptor.
      39             : */
      40             : 
      41             : 
      42             : #ifdef HAVE_FOPENCOOKIE
      43             : FILE *
      44           0 : _gpgme_funopen(void *cookie,
      45             :                 cookie_read_function_t *readfn,
      46             :                 cookie_write_function_t *writefn,
      47             :                 cookie_seek_function_t *seekfn,
      48             :                 cookie_close_function_t *closefn)
      49             : {
      50           0 :   cookie_io_functions_t io = { NULL };
      51             : 
      52           0 :   io.read = readfn;
      53           0 :   io.write = writefn;
      54           0 :   io.seek = seekfn;
      55           0 :   io.close = closefn;
      56             : 
      57           0 :   return fopencookie (cookie,
      58           0 :                       readfn ? ( writefn ? "rw" : "r" )
      59           0 :                       : ( writefn ? "w" : ""), io);
      60             : }
      61             : #else
      62             : #error No known way to implement funopen.
      63             : #endif