Update of /cvsroot/freevo/freevo/src/util
In directory sc8-pr-cvs1:/tmp/cvs-serv18734
Added Files:
ioctl.py
Log Message:
A class to make using ioctls much easier.
--- NEW FILE: ioctl.py ---
#if 0 /*
# -----------------------------------------------------------------------
# ioctl.py - A modules to make ioctl's in python easier.
# -----------------------------------------------------------------------
# $Id: ioctl.py,v 1.1 2003/10/11 11:54:22 rshortt Exp $
#
# Notes:
# Todo:
#
# -----------------------------------------------------------------------
# $Log: ioctl.py,v $
# Revision 1.1 2003/10/11 11:54:22 rshortt
# A class to make using ioctls much easier.
#
#
#
# -----------------------------------------------------------------------
# Freevo - A Home Theater PC framework
# Copyright (C) 2003 Krister Lagerstrom, et al.
# Please see the file freevo/Docs/CREDITS for a complete list of authors.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MER-
# CHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
# Public License for more details.
#
# You should have received a copy of the GNU 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
#
# ----------------------------------------------------------------------- */
#endif
import struct
_IOC_NRBITS = 8
_IOC_TYPEBITS = 8
_IOC_SIZEBITS = 14
_IOC_DIRBITS = 2
_IOC_NRMASK = ((1 << _IOC_NRBITS)-1)
_IOC_TYPEMASK = ((1 << _IOC_TYPEBITS)-1)
_IOC_SIZEMASK = ((1 << _IOC_SIZEBITS)-1)
_IOC_DIRMASK = ((1 << _IOC_DIRBITS)-1)
_IOC_NRSHIFT = 0
_IOC_TYPESHIFT = (_IOC_NRSHIFT+_IOC_NRBITS)
_IOC_SIZESHIFT = (_IOC_TYPESHIFT+_IOC_TYPEBITS)
_IOC_DIRSHIFT = (_IOC_SIZESHIFT+_IOC_SIZEBITS)
# Direction bits.
_IOC_NONE = 0
_IOC_WRITE = 1
_IOC_READ = 2
def _IOC(dir,type,nr,size):
return (((dir) << _IOC_DIRSHIFT) | \
(ord(type) << _IOC_TYPESHIFT) | \
((nr) << _IOC_NRSHIFT) | \
((size) << _IOC_SIZESHIFT))
def IO(type,nr): return _IOC(_IOC_NONE,(type),(nr),0)
def IOR(type,nr,size): return _IOC(_IOC_READ,(type),(nr),struct.calcsize(size))
def IOW(type,nr,size): return _IOC(_IOC_WRITE,(type),(nr),struct.calcsize(size))
def IOWR(type,nr,size): return
_IOC(_IOC_READ|_IOC_WRITE,(type),(nr),struct.calcsize(size))
# used to decode ioctl numbers..
def IOC_DIR(nr): return (((nr) >> _IOC_DIRSHIFT) & _IOC_DIRMASK)
def IOC_TYPE(nr): return (((nr) >> _IOC_TYPESHIFT) & _IOC_TYPEMASK)
def IOC_NR(nr): return (((nr) >> _IOC_NRSHIFT) & _IOC_NRMASK)
def IOC_SIZE(nr): return (((nr) >> _IOC_SIZESHIFT) & _IOC_SIZEMASK)
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