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/*#######################################################################

# RDOS operating system

# Copyright (C) 1988-2006, Leif Ekblad

#

# This library 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.

#

# This library 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 library; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

#

# The author of this program may be contacted at leif@rdos.net

#

# lseek.c

# lseek function implementation

#

##########################################################################*/

#include "config.h"

#include <_ansi.h>

#include <_syslist.h>

#include <unistd.h>

#include <errno.h>

#include <rdos.h>

off_t lseek(int file, off_t pos, int whence)

{

        off_t temp;

        switch (whence)

        {

                case SEEK_CUR:

                        temp = RdosGetFilePos(file);

                        temp += pos;

                        RdosSetFilePos(file, temp);

                        return temp;

                case SEEK_SET:

                        RdosSetFilePos(file, pos);

                        return pos;

                case SEEK_END:

                        temp = RdosGetFilePos(file);

                        temp += pos;

                        RdosSetFilePos(file, temp);

                        return temp;

                default:

                        errno = EINVAL;

                        return - 1;

        }

}