Subversion Repositories openrisc_2011-10-31

/* read.c -- read characters from file, with hook.

 *

 * Copyright (c) 2003  Red Hat, Inc. All rights reserved.

 *

 * This copyrighted material is made available to anyone wishing to use, modify,

 * copy, or redistribute it subject to the terms and conditions of the BSD

 * License.  This program is distributed in the hope that it will be useful,

 * but WITHOUT ANY WARRANTY expressed or implied, including the implied

 * warranties of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  A copy

 * of this license is available at http://www.opensource.org/licenses. Any

 * Red Hat trademarks that are incorporated in the source code or documentation

 * are not subject to the BSD License and may only be used or replicated with

 * the express permission of Red Hat, Inc.

 */

extern int __mep_read(int, unsigned char *, int);

extern int _ioIn(void) __attribute__((weak));

int

read(int fd, unsigned char *buf, int count)

{

  if (fd == 0 && &_ioIn)

    {

      int c = 0;

      while (c < count)

        {

          int ch = _ioIn();

          *buf++ = ch;

          if (ch == -1)

            break;

          c ++;

        }

      return c;

    }

  return __mep_read(fd, buf, count);

}