From 7d45aa4f8ac922a1f7515a35b05ec0639290b34d Mon Sep 17 00:00:00 2001
From: xdavidwu <xdavidwuph@gmail.com>
Date: Mon, 4 Jul 2022 00:29:50 +0800
Subject: [PATCH] evdev: generate code defs from c header

---
 .gitignore              |  2 ++
 Makefile                | 12 +++++++++---
 aux/event-codes/main.ha | 38 ++++++++++++++++++++++++++++++++++++++
 evdev/codes.ha          | 29 -----------------------------
 4 files changed, 49 insertions(+), 32 deletions(-)
 create mode 100644 aux/event-codes/main.ha
 delete mode 100644 evdev/codes.ha

diff --git a/.gitignore b/.gitignore
index 485f898..c158694 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,5 @@
 /pointerd
 /motion-control
 /buttonc
+/evdev/codes.ha
+/event-codes
diff --git a/Makefile b/Makefile
index 53904ca..7ca3324 100644
--- a/Makefile
+++ b/Makefile
@@ -1,17 +1,23 @@
 SENSORS ?= gy801
+HEADERS_PREFIX ?= /usr/include
 BINARIES = evdev-dump-events uinput-pointer sensors-dump pointerd pointerc motion-control buttonc
 
-evdev-dump-events uinput-pointer:
+event-codes:
+	hare build -o $@ aux/$@/
+evdev/codes.ha: event-codes
+	./event-codes <$(HEADERS_PREFIX)/linux/input-event-codes.h >$@
+
+evdev-dump-events uinput-pointer: evdev/codes.ha
 	hare build -levdev -o $@ tools/$@/
 sensors-dump pointerc:
 	hare build -T +$(SENSORS) -o $@ tools/$@/
 buttonc:
 	hare build -o $@ tools/$@/
-pointerd:
+pointerd: evdev/codes.ha
 	hare build -levdev -o $@ cmd/$@/
 motion-control:
 	hare build -T +$(SENSORS) -o $@ cmd/$@/
 .PHONY: $(BINARIES)
 all: $(BINARIES)
 clean:
-	rm -f $(BINARIES)
+	rm -f event-codes evdev/codes.ha $(BINARIES)
diff --git a/aux/event-codes/main.ha b/aux/event-codes/main.ha
new file mode 100644
index 0000000..3ef97a5
--- /dev/null
+++ b/aux/event-codes/main.ha
@@ -0,0 +1,38 @@
+use bufio;
+use fmt;
+use io;
+use os;
+use strings;
+
+export fn main() void = {
+	for (true) {
+		const line = match (bufio::scanline(os::stdin)!) {
+		case let s: []u8 =>
+			yield strings::fromutf8(s);
+		case io::EOF =>
+			return;
+		};
+
+		if (!strings::hasprefix(line, "#define")) {
+			free(line);
+			continue;
+		};
+		const iend = match (strings::index(strings::sub(line, 8, strings::end), '\t')) {
+		case void =>
+			free(line);
+			continue;
+		case let s: size =>
+			yield s + 8;
+		};
+		const val = strings::trim(strings::sub(line, iend, strings::end), '\t');
+		const val = match (strings::index(val, "/*")) {
+		case void =>
+			yield val;
+		case let s: size =>
+			yield strings::sub(val, 0, s);
+		};
+		fmt::printfln("export def {}: u16\t= {};", strings::sub(line, 8, iend), val)!;
+
+		free(line);
+	};
+};
diff --git a/evdev/codes.ha b/evdev/codes.ha
deleted file mode 100644
index 1b31c3b..0000000
--- a/evdev/codes.ha
+++ /dev/null
@@ -1,29 +0,0 @@
-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;
-- 
2.45.2