gizhw:evdev

the Linux backend of gizhw:input. Input devices (evdev, /dev/input/eventN): a device's name and ids, and its events as the kernel reports them (struct input_event: 24 bytes on 64-bit). Every call is on a Handle of gizhw:device, so no libc call is here.

import * as Evdev from "gizhw:evdev";

Types

Ids

type Ids = { bus: i64; vendor: i64; product: i64; version: i64; }

A device's ids: bus, vendor, product and version (struct input_id).

• bus: i64
• vendor: i64
• product: i64
• version: i64

Event

type Event = { time: i64; type: i64; code: i64; value: i64; }

One event: time in milliseconds, type (EV_SYN 0, EV_KEY 1, EV_REL 2, EV_ABS 3), code and value.

• time: i64
• type: i64
• code: i64
• value: i64

Functions

parseIds

function parseIds(data: bytes): Ids

The ids in the 8-byte reply to EVIOCGID.

Effects: fail.

parseEvents

function parseEvents(data: bytes): Vec<Event>

The events in data, whole structs only: time (seconds and microseconds, 8 bytes each), type, code (u16 each) and value (i32).

Effects: fail.

name

function name(h: Device.Handle): string throws string

The name of the input device behind h.

Effects: fail, io.

ids

function ids(h: Device.Handle): Ids throws string

The ids of the input device behind h.

Effects: fail, io.

events

function events(h: Device.Handle, count: i64): Vec<Event> throws string

The next count events, waiting for them.

Effects: fail, io.

inputs

function inputs(sys: System): Vec<Device.Device> throws IoError

The event devices of the input class (eventN with a node).

Effects: fail, io.

open

function open(sys: System, node: string): Device.Handle throws string

The handle on the event device node (read-only is enough for reading events).

Effects: fail, io.