From 7380af2c93dc83f4f09e293717d46eadf7799e89 Mon Sep 17 00:00:00 2001
From: Henrik Rydberg <rydberg@euromail.se>
Date: Mon, 21 Jun 2010 18:56:49 +0200
Subject: Simplify event reading

This patch puts the reading code more in line with the upcoming
mtdev library, and should remove some spurious input behavior.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
---
 src/hwstate.c | 16 ++--------------
 src/mtouch.c  | 34 +++++++++++++++++++++++++++-------
 src/test.c    | 10 ++++------
 3 files changed, 33 insertions(+), 27 deletions(-)

(limited to 'src')

diff --git a/src/hwstate.c b/src/hwstate.c
index b29ee54..82a3a10 100644
--- a/src/hwstate.c
+++ b/src/hwstate.c
@@ -43,8 +43,8 @@ static void finish_packet(struct HWState *s, const struct Capabilities *caps,
 	s->evtime = syn->time.tv_usec / ms + syn->time.tv_sec * ms;
 }
 
-static int read_event(struct HWState *s, const struct Capabilities *caps,
-		      const struct input_event *ev)
+int hwstate_read(struct HWState *s, const struct Capabilities *caps,
+		 const struct input_event *ev)
 {
 	switch (ev->type) {
 	case EV_SYN:
@@ -107,15 +107,3 @@ static int read_event(struct HWState *s, const struct Capabilities *caps,
 	}
 	return 0;
 }
-
-int modify_hwstate(struct HWState *s, struct MTDev *dev,
-		   const struct Capabilities *caps)
-{
-	struct input_event ev;
-	while (!mtdev_empty(dev)) {
-		mtdev_get(dev, &ev);
-		if (read_event(s, caps, &ev))
-			return 1;
-	}
-	return 0;
-}
diff --git a/src/mtouch.c b/src/mtouch.c
index 14c0fd9..f7a2710 100644
--- a/src/mtouch.c
+++ b/src/mtouch.c
@@ -48,6 +48,23 @@ int open_mtouch(struct MTouch *mt, int fd)
 	return 0;
 }
 
+
+int get_mtouch(struct MTouch *mt, int fd, struct input_event* ev, int ev_max)
+{
+	const struct input_event *kev;
+	int count = 0;
+	while (count < ev_max) {
+		while (mtdev_empty(&mt->dev)) {
+			kev = get_iobuf_event(&mt->buf, fd);
+			if (!kev)
+				return count;
+			mtdev_put(&mt->dev, &mt->caps, kev);
+		}
+		mtdev_get(&mt->dev, &ev[count++]);
+	}
+	return count;
+}
+
 int close_mtouch(struct MTouch *mt, int fd)
 {
 	if (use_grab) {
@@ -58,11 +75,15 @@ int close_mtouch(struct MTouch *mt, int fd)
 	return 0;
 }
 
-int parse_event(struct MTouch *mt, const struct input_event *ev)
+int read_packet(struct MTouch *mt, int fd)
 {
-	mtdev_put(&mt->dev, &mt->caps, ev);
-	if (!modify_hwstate(&mt->hs, &mt->dev, &mt->caps))
-		return 0;
+	struct input_event ev;
+	int ret;
+	while ((ret = get_mtouch(mt, fd, &ev, 1)) > 0)
+		if (hwstate_read(&mt->hs, &mt->caps, &ev))
+			break;
+	if (ret <= 0)
+		return ret;
 	extract_mtstate(&mt->state, &mt->hs, &mt->caps);
 #if 0
 	output_mtstate(&mt->state);
@@ -74,10 +95,9 @@ int parse_event(struct MTouch *mt, const struct input_event *ev)
 	return 1;
 }
 
-int mt_is_idle(struct MTouch *mt, int fd)
+int has_delayed_gestures(struct MTouch *mt, int fd)
 {
 	return mt->mem.wait &&
-		evbuf_empty(&mt->dev.outbuf) &&
-		evbuf_empty(&mt->dev.inbuf) &&
+		mtdev_empty(&mt->dev) &&
 		poll_iobuf(&mt->buf, fd, mt->mem.wait) == 0;
 }
diff --git a/src/test.c b/src/test.c
index ce2fdf5..e4247d2 100644
--- a/src/test.c
+++ b/src/test.c
@@ -27,8 +27,6 @@ static void loop_device(int fd)
 {
 	struct Gestures gs;
 	struct MTouch mt;
-	const struct input_event *ev;
-	struct input_event event;
 	if (configure_mtouch(&mt, fd)) {
 		fprintf(stderr, "error: could not configure device\n");
 		return;
@@ -37,12 +35,12 @@ static void loop_device(int fd)
 		fprintf(stderr, "error: could not open device\n");
 		return;
 	}
-	while (ev = get_iobuf_event(&mt.buf, fd)) {
-		if (parse_event(&mt, ev)) {
+	while (poll_iobuf(&mt.buf, fd, 5000)) {
+		while (read_packet(&mt, fd) > 0) {
 			extract_gestures(&gs, &mt);
 			output_gesture(&gs);
 		}
-		if (mt_is_idle(&mt, fd)) {
+		if (has_delayed_gestures(&mt, fd)) {
 			extract_delayed_gestures(&gs, &mt);
 			output_gesture(&gs);
 		}
@@ -56,7 +54,7 @@ int main(int argc, char *argv[])
 		fprintf(stderr, "Usage: test <mtdev>\n");
 		return -1;
 	}
-	int fd = open(argv[1], O_RDONLY);
+	int fd = open(argv[1], O_RDONLY | O_NONBLOCK);
 	if (fd < 0) {
 		fprintf(stderr, "error: could not open file\n");
 		return -1;
-- 
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