Crate ioctl_gen

This crate lets you encode and decode ioctl numbers. It's pretty much just a port of ioctl.h.

Here are some examples:

#[macro_use]
extern crate ioctlify;

// Taken from <linux/videodev2.h>
const VIDIOC_RESERVED:   u32 = io!(b'V', 1);
const VIDIOC_STREAMON:   u32 = iow!(b'V', 18, 4);
const VIDIOC_LOG_STATUS: u32 = io!(b'V', 70);

assert_eq!(ioc_type!(VIDIOC_RESERVED), b'V' as u32);
assert_eq!(VIDIOC_STREAMON, 1074026002);
assert_eq!(ioc_nr!(VIDIOC_LOG_STATUS), 70);

Macros

io	Creates the ioctl number for an operation that isn't reading or writing.
ioc	Creates the ioctl number for the given data.
ioc_dir	Decodes the access mode / direction from an ioctl number.
ioc_nr	Decodes the function number from an ioctl number.
ioc_size	Decodes the parameter size from an ioctl number.
ioc_type	Decodes the type from an ioctl number.
ior	Creates the ioctl number for a read-only operation.
iow	Creates the ioctl number for a write-only operation.
iowr	Creates the ioctl number for a read/write operation.

Constants

DIRBITS	The number of bits used for the direction field.
DIRMASK	Bitmask for the direction field.
DIRSHIFT	Offset of the direction field.
NONE	Neither direction.
NRBITS	The number of bits used for the number field.
NRMASK	Bitmask for the number field.
NRSHIFT	Offset of the number field.
READ	The read direction.
SIZEBITS	The number of bits used for the size field.
SIZEMASK	Bitmask for the size field.
SIZESHIFT	Offset of the size field.
TYPEBITS	The number of bits used for the type field.
TYPEMASK	Bitmask for the type field.
TYPESHIFT	Offset of the type field.
WRITE	The write direction.