From e3036ba170e8a4ae82bc083352a65e8f555c6220 Mon Sep 17 00:00:00 2001
From: xdavidwu <xdavidwuph@gmail.com>
Date: Mon, 16 May 2022 01:14:41 +0800
Subject: [PATCH] evdev: create some bindings for device modification

---
 evdev/codes.ha    | 29 +++++++++++++++++++++++++++++
 evdev/libevdev.ha | 28 +++++++++++++++++++++++++++-
 evdev/types.ha    |  2 ++
 3 files changed, 58 insertions(+), 1 deletion(-)
 create mode 100644 evdev/codes.ha

diff --git a/evdev/codes.ha b/evdev/codes.ha
new file mode 100644
index 0000000..1b31c3b
--- /dev/null
+++ b/evdev/codes.ha
@@ -0,0 +1,29 @@
+export def EV_SYN: u16	= 0x00;
+export def EV_KEY: u16	= 0x01;
+export def EV_REL: u16	= 0x02;
+export def EV_ABS: u16	= 0x03;
+export def EV_MSC: u16	= 0x04;
+export def EV_SW: u16	= 0x05;
+export def EV_LED: u16	= 0x11;
+export def EV_SND: u16	= 0x12;
+export def EV_REP: u16	= 0x14;
+export def EV_FF: u16	= 0x15;
+export def EV_PWR: u16	= 0x16;
+export def EV_FF_STATUS: u16	= 0x17;
+export def EV_MAX: u16	= 0x1f;
+export def EV_CNT: u16	= EV_MAX + 1;
+
+export def SYN_REPORT: u16	= 0;
+export def SYN_CONFIG: u16	= 1;
+export def SYN_MT_REPORT: u16	= 2;
+export def SYN_DROPPED: u16	= 3;
+export def SYN_MAX: u16	= 0xf;
+export def SYN_CNT: u16	= SYN_MAX + 1;
+
+export def BTN_LEFT: u16	= 0x110;
+export def BTN_RIGHT: u16	= 0x111;
+export def BTN_MIDDLE: u16	= 0x112;
+
+export def REL_X: u16	= 0x00;
+export def REL_Y: u16	= 0x01;
+export def REL_Z: u16	= 0x02;
diff --git a/evdev/libevdev.ha b/evdev/libevdev.ha
index 3365b41..618bf2f 100644
--- a/evdev/libevdev.ha
+++ b/evdev/libevdev.ha
@@ -15,6 +15,12 @@ export fn get_name(dev: libevdev) const str = {
 	return strings::fromc(c_libevdev_get_name(dev));
 };
 
+export fn set_name(dev: libevdev, name: str) void = {
+	const cstr = strings::to_c(name);
+	defer free(cstr);
+	c_libevdev_set_name(dev, cstr);
+};
+
 export fn next_event(dev: libevdev, flags: uint) (rt::errno | input_event) = {
 	let ev = input_event { ... };
 	const r = c_libevdev_next_event(dev, flags, &ev);
@@ -24,6 +30,26 @@ export fn next_event(dev: libevdev, flags: uint) (rt::errno | input_event) = {
 	return ev;
 };
 
+export fn enable_event_type(dev: libevdev, event_type: uint) (void | unknown_error) = {
+	return if (c_libevdev_enable_event_type(dev, event_type) != 0) unknown_error else void;
+};
+
+export fn enable_event_code(dev: libevdev, event_type: uint, code: uint,
+		data: nullable *void) (void | unknown_error) = {
+	// TODO: wrap data with tagged union?
+	return if (c_libevdev_enable_event_code(dev, event_type, code, data) != 0)
+		unknown_error else void;
+};
+
+export @symbol("libevdev_new") fn new() libevdev;
+export @symbol("libevdev_free") fn destroy(dev: libevdev) void;
+
 @symbol("libevdev_new_from_fd") fn c_libevdev_new_from_fd(fd: int, dev: *libevdev) int;
 @symbol("libevdev_get_name") fn c_libevdev_get_name(dev: libevdev) *const char;
-@symbol("libevdev_next_event") fn c_libevdev_next_event(dev: libevdev, flags: uint, ev: *input_event) int;
+@symbol("libevdev_set_name") fn c_libevdev_set_name(dev: libevdev, name: *const char) void;
+@symbol("libevdev_next_event") fn c_libevdev_next_event(dev: libevdev,
+	flags: uint, ev: *input_event) int;
+@symbol("libevdev_enable_event_type") fn c_libevdev_enable_event_type(
+	dev: libevdev, etype: uint) int;
+@symbol("libevdev_enable_event_code") fn c_libevdev_enable_event_code(
+	dev: libevdev, etype: uint, code: uint, data: nullable *void) int;
diff --git a/evdev/types.ha b/evdev/types.ha
index 37c28e8..e6a6cf1 100644
--- a/evdev/types.ha
+++ b/evdev/types.ha
@@ -9,4 +9,6 @@ export type input_event = struct {
 	value:	i32,
 };
 
+export type unknown_error = !void;
+
 export def READ_FLAG_NORMAL: uint	= 2;
-- 
2.45.2