gnupg/assuan/assuan-io.c

/* assuan-buffer.c - Wraps the read and write functions.
 *	Copyright (C) 2002 Free Software Foundation, Inc.
 *
 * This file is part of Assuan.
 *
 * Assuan is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * Assuan is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 
 */

#include <sys/types.h>
#include <unistd.h>

extern ssize_t pth_read (int fd, void *buffer, size_t size);
extern ssize_t pth_write (int fd, const void *buffer, size_t size);

#pragma weak pth_read
#pragma weak pth_write

ssize_t
_assuan_read (int fd, void *buffer, size_t size)
{
  static ssize_t (*reader) (int, void *, size_t);

  if (! reader)
    {
      if (pth_read)
	reader = pth_read;
      else
	reader = read;
    }

  return reader (fd, buffer, size);
}

ssize_t
_assuan_write (int fd, const void *buffer, size_t size)
{
  static ssize_t (*writer) (int, const void *, size_t);

  if (! writer)
    {
      if (pth_write)
	writer = pth_write;
      else
	writer = write;
    }

  return writer (fd, buffer, size);
}