[PATCH libinput] tools: replace the tap time measuring tool with a python one
Dima Ryazanov
dima at gmail.com
Thu Nov 16 07:03:41 UTC 2017
Oh nice, much simpler. I have a few nitpick comments, but it looks good,
and works for me.
Reviewed-By: Dima Ryazanov <dima at gmail.com>
Tested-By: Dima Ryazanov <dima at gmail.com>
On Thu, Nov 16, 2017 at 1:11 PM, Peter Hutterer <peter.hutterer at who-t.net>
wrote:
> A lot easier to process data in python than in C.
>
> Signed-off-by: Peter Hutterer <peter.hutterer at who-t.net>
> ---
> meson.build | 10 +-
> tools/libinput-measure-touchpad-tap | 261 +++++++++++++++++
> tools/libinput-measure-touchpad-tap.c | 509
> ----------------------------------
> 3 files changed, 263 insertions(+), 517 deletions(-)
> create mode 100755 tools/libinput-measure-touchpad-tap
> delete mode 100644 tools/libinput-measure-touchpad-tap.c
>
> diff --git a/meson.build b/meson.build
> index eefe3d61..4d433989 100644
> --- a/meson.build
> +++ b/meson.build
> @@ -414,14 +414,8 @@ configure_file(input : 'tools/libinput-measure.man',
> install_dir : join_paths(get_option('mandir'), 'man1')
> )
>
> -libinput_measure_touchpad_tap_sources = [ 'tools/libinput-measure-touchpad-tap.c'
> ]
> -executable('libinput-measure-touchpad-tap',
> - libinput_measure_touchpad_tap_sources,
> - dependencies : deps_tools,
> - include_directories : [includes_src, includes_include],
> - install_dir : libinput_tool_path,
> - install : true,
> - )
> +install_data('tools/libinput-measure-touchpad-tap',
> + install_dir : libinput_tool_path)
> configure_file(input : 'tools/libinput-measure-touchpad-tap.man',
> output : 'libinput-measure-touchpad-tap.1',
> configuration : man_config,
> diff --git a/tools/libinput-measure-touchpad-tap
> b/tools/libinput-measure-touchpad-tap
> new file mode 100755
> index 00000000..165cd65a
> --- /dev/null
> +++ b/tools/libinput-measure-touchpad-tap
> @@ -0,0 +1,261 @@
> +#!/usr/bin/python3
> +# vim: set expandtab shiftwidth=4:
> +# -*- Mode: python; coding: utf-8; indent-tabs-mode: nil -*- */
> +#
> +# Copyright © 2017 Red Hat, Inc.
> +#
> +# Permission is hereby granted, free of charge, to any person obtaining a
> +# copy of this software and associated documentation files (the
> "Software"),
> +# to deal in the Software without restriction, including without
> limitation
> +# the rights to use, copy, modify, merge, publish, distribute, sublicense,
> +# and/or sell copies of the Software, and to permit persons to whom the
> +# Software is furnished to do so, subject to the following conditions:
> +#
> +# The above copyright notice and this permission notice (including the
> next
> +# paragraph) shall be included in all copies or substantial portions of
> the
> +# Software.
> +#
> +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
> OR
> +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
> +# THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
> OTHER
> +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> +# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> +# DEALINGS IN THE SOFTWARE.
> +#
> +
> +import sys
> +import argparse
> +try:
> + import evdev
> + import evdev.ecodes
> + import textwrap
> + import pyudev
> +except ModuleNotFoundError as e:
> + print('Error: {}'.format(str(e)), file=sys.stderr)
>
"str" is redundant here.
> + print('One or more python modules are missing. Please install those '
> + 'modules and re-run this tool.')
> + sys.exit(1)
> +
> +print_dest = sys.stdout
> +
> +
> +def error(msg, **kwargs):
> + print(msg, **kwargs, file=sys.stderr)
> +
> +
> +def msg(msg, **kwargs):
> + print(msg, **kwargs, file=print_dest, flush=True)
> +
> +
> +def tv2us(sec, usec):
> + return sec * 1000000 + usec
> +
> +
> +def us2ms(us):
> + return int(us/1000)
> +
> +
> +class Touch(object):
> + def __init__(self, down):
> + self._down = down
> + self._up = down
> +
> + @property
> + def up(self):
> + return us2ms(self._up)
> +
> + @up.setter
> + def up(self, up):
> + assert(up > self.down)
>
Should this be "up >= self.down"? Or is it not possible to have the same
timestamp?
> + self._up = up
> +
> + @property
> + def down(self):
> + return us2ms(self._down)
> +
> + @property
> + def tdelta(self):
> + return self.up - self.down
> +
> +
> +class InvalidDeviceError(Exception):
> + pass
> +
> +
> +class Device(object):
> + def __init__(self, path):
> + if path is None:
> + self.path = self._find_touch_device()
> + else:
> + self.path = path
> +
> + self.device = evdev.InputDevice(self.path)
> + # capabilities returns a dict with the EV_* codes as key,
> + # each of which is a list of tuples of (code, AbsInfo)
> + #
> + # Get the abs list first (or empty list if missing),
> + # then extract the pressure absinfo from that
> + codes = self.device.capabilities(absinfo=True).get(
> + evdev.ecodes.EV_KEY, []
> + )
> +
> + if evdev.ecodes.BTN_TOUCH not in codes:
> + raise InvalidDeviceError("device does not have BTN_TOUCH")
> +
> + self.touches = []
> +
> + def _find_touch_device(self):
> + context = pyudev.Context()
> + device_node = None
> + for device in context.list_devices(subsystem='input'):
> + if not device.device_node or \
>
Parenthesis are preferred over \ (according to PEP 8)
> + not device.device_node.startswith(
> '/dev/input/event'):
> + continue
> +
> + # pick the touchpad by default, fallback to the first
> + # touchscreen only when there is no touchpad
> + if device.get('ID_INPUT_TOUCHPAD', 0):
> + device_node = device.device_node
> + break
> +
> + if device.get('ID_INPUT_TOUCHSCREEN', 0) and device_node is
> None:
> + device_node = device.device_node
> +
> + if device_node is not None:
> + return device_node
> +
> + print("Unable to find a touch device.", file=sys.stderr)
>
Use the "error" helper? Or better yet, raise an exception instead of
sys.exit.
> + sys.exit(1)
> +
> + def handle_btn_touch(self, event):
> + if event.value != 0:
> + t = Touch(tv2us(event.sec, event.usec))
> + self.touches.append(t)
> + else:
> + self.touches[-1].up = tv2us(event.sec, event.usec)
> + msg("\rTouch sequences detected:
> {}".format(len(self.touches)),
> + end='')
> +
> + def handle_key(self, event):
> + tapcodes = [evdev.ecodes.BTN_TOOL_DOUBLETAP,
> + evdev.ecodes.BTN_TOOL_TRIPLETAP,
> + evdev.ecodes.BTN_TOOL_QUADTAP,
> + evdev.ecodes.BTN_TOOL_QUINTTAP]
> + if event.code in tapcodes and event.value > 0:
> + error("\rThis tool cannot handle multiple fingers, "
> + "output will be invalid")
> + return
> +
> + if event.code == evdev.ecodes.BTN_TOUCH:
> + self.handle_btn_touch(event)
> +
> + def handle_syn(self, event):
> + if self.touch.dirty:
> + self.current_sequence().append(self.touch)
> + self.touch = Touch(major=self.touch.major,
> + minor=self.touch.minor,
> + orientation=self.touch.orientation)
> +
> + def handle_event(self, event):
> + if event.type == evdev.ecodes.EV_KEY:
> + self.handle_key(event)
> +
> + def read_events(self):
> + for event in self.device.read_loop():
> + self.handle_event(event)
> +
> + def print_summary(self):
> + deltas = sorted([t.tdelta for t in self.touches])
>
Nit: don't need [ and ] here.
> +
> + dmax = max(deltas)
> + dmin = min(deltas)
> +
> + l = len(deltas)
> +
> + davg = sum(deltas)/l
> + dmedian = deltas[int(l/2)]
> + d95pc = deltas[int(l * 0.95)]
> + d90pc = deltas[int(l * 0.90)]
> +
> + print("Time: ")
> + print(" Max delta: {}ms".format(int(dmax)))
> + print(" Min delta: {}ms".format(int(dmin)))
> + print(" Average delta: {}ms".format(int(davg)))
> + print(" Median delta: {}ms".format(int(dmedian)))
> + print(" 90th percentile: {}ms".format(int(d90pc)))
> + print(" 95th percentile: {}ms".format(int(d95pc)))
> +
> + def print_dat(self):
> + print("# libinput-measure-touchpad-tap")
> + print(textwrap.dedent('''\
> + # File contents:
> + # This file contains multiple prints of the data in
> + # different sort order. Row number is index of touch
> + # point within each group. Comparing data across groups
> + # will result in invalid analysis.
> + # Columns (1-indexed):
> + # Group 1, sorted by time of occurence
> + # 1: touch down time in ms, offset by first event
> + # 2: touch up time in ms, offset by first event
> + # 3: time delta in ms);
> + # Group 2, sorted by touch down-up delta time (ascending)
> + # 4: touch down time in ms, offset by first event
> + # 5: touch up time in ms, offset by first event
> + # 6: time delta in ms
> + '''))
> +
> + deltas = [t for t in self.touches]
> + deltas_sorted = sorted(deltas, key=lambda t: t.tdelta)
> +
> + offset = deltas[0].down
> +
> + for t1, t2 in zip(deltas, deltas_sorted):
> + print(t1.down - offset, t1.up - offset, t1.tdelta,
> + t2.down - offset, t2.up - offset, t2.tdelta)
> +
> + def print(self, format):
> + if not self.touches:
> + error("No tap data available")
> + return
> +
> + if format == 'summary':
> + self.print_summary()
> + elif format == 'dat':
> + self.print_dat()
> +
> +
> +def main(args):
> + parser = argparse.ArgumentParser(
> + description="Measure tap-to-click properties of devices"
> + )
> + parser.add_argument('path', metavar='/dev/input/event0',
>
"/dev/input/event0" should probably be the default value, not the metavar?
> + nargs='?', type=str, help='Path to device
> (optional)')
> + parser.add_argument('--format', metavar='format',
> + choices=['summary', 'dat'],
> + default='summary',
> + help='data format to print ("summary" or "dat")')
> + args = parser.parse_args()
> +
> + if not sys.stdout.isatty():
> + global print_dest
> + print_dest = sys.stderr
> +
> + try:
> + device = Device(args.path)
> + error("Ready for recording data.\n"
> + "Tap the touchpad multiple times with a single finger
> only.\n"
> + "For useful data we recommend at least 20 taps.\n"
> + "Ctrl+C to exit")
> + device.read_events()
> + except KeyboardInterrupt:
> + msg('')
> + device.print(args.format)
> + except (PermissionError, OSError):
> + print("Error: failed to open device")
>
Might as well print out the exception, too.
> + except InvalidDeviceError as e:
> + print("Error: {}".format(e))
> +
> +
> +if __name__ == "__main__":
> + main(sys.argv)
> diff --git a/tools/libinput-measure-touchpad-tap.c
> b/tools/libinput-measure-touchpad-tap.c
> deleted file mode 100644
> index 735202c1..00000000
> --- a/tools/libinput-measure-touchpad-tap.c
> +++ /dev/null
> @@ -1,509 +0,0 @@
> -/*
> - * Copyright © 2017 Red Hat, Inc.
> - *
> - * Permission is hereby granted, free of charge, to any person obtaining a
> - * copy of this software and associated documentation files (the
> "Software"),
> - * to deal in the Software without restriction, including without
> limitation
> - * the rights to use, copy, modify, merge, publish, distribute,
> sublicense,
> - * and/or sell copies of the Software, and to permit persons to whom the
> - * Software is furnished to do so, subject to the following conditions:
> - *
> - * The above copyright notice and this permission notice (including the
> next
> - * paragraph) shall be included in all copies or substantial portions of
> the
> - * Software.
> - *
> - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> EXPRESS OR
> - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> MERCHANTABILITY,
> - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
> SHALL
> - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
> OTHER
> - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
> - * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> - * DEALINGS IN THE SOFTWARE.
> - */
> -
> -#include "config.h"
> -
> -#include <errno.h>
> -#include <fcntl.h>
> -#include <getopt.h>
> -#include <poll.h>
> -#include <signal.h>
> -#include <stdbool.h>
> -#include <stdio.h>
> -#include <string.h>
> -#include <unistd.h>
> -#include <sys/signalfd.h>
> -
> -#include <libudev.h>
> -#include <libevdev/libevdev.h>
> -
> -#include <libinput-util.h>
> -#include <libinput-version.h>
> -
> -#include "shared.h"
> -
> -static bool print_dat_file;
> -/* interactive goes to stdout unless we're redirected, then it goes to
> - * stderr */
> -static FILE *pdest;
> -
> -#define error(...) fprintf(stderr, __VA_ARGS__)
> -#define msg(...) fprintf(pdest, __VA_ARGS__)
> -
> -struct touch {
> - uint32_t tdown, tup; /* in ms */
> -};
> -
> -struct tap_data {
> - struct touch *touches;
> - size_t touches_sz;
> - unsigned int count;
> -
> - uint32_t toffset; /* in ms */
> -};
> -
> -static inline uint32_t
> -touch_tdelta_ms(const struct touch *t)
> -{
> - return t->tup - t->tdown;
> -}
> -
> -static inline struct tap_data *
> -tap_data_new(void)
> -{
> - struct tap_data *tap_data;
> -
> - tap_data = zalloc(sizeof(struct tap_data));
> -
> - return tap_data;
> -}
> -
> -static inline unsigned int
> -tap_data_ntouches(struct tap_data *tap_data)
> -{
> - return tap_data->count;
> -}
> -
> -static inline void
> -tap_data_free(struct tap_data **tap_data)
> -{
> - free((*tap_data)->touches);
> - free((*tap_data));
> - *tap_data = NULL;
> -}
> -
> -static inline struct touch *
> -tap_data_get_current_touch(struct tap_data *tap_data)
> -{
> - assert(tap_data->count > 0);
> -
> - return &tap_data->touches[tap_data->count - 1];
> -}
> -
> -static inline struct touch *
> -tap_data_get_touch(struct tap_data *tap_data, unsigned int idx)
> -{
> - assert(idx < tap_data->count);
> -
> - return &tap_data->touches[idx];
> -}
> -
> -#define tap_data_for_each(tapdata_, t_) \
> - for (unsigned i_ = 0; i_ < (tapdata_)->count && (t_ =
> &(tapdata_)->touches[i_]); i_++)
> -
> -static inline struct tap_data *
> -tap_data_duplicate_sorted(const struct tap_data *src,
> - int (*cmp)(const void *a, const void *b))
> -{
> - struct tap_data *dest = tap_data_new();
> -
> - assert(src->count > 0);
> -
> - dest->count = src->count;
> - dest->toffset = src->toffset;
> - dest->touches_sz = dest->count;
> - dest->touches = zalloc(dest->count * sizeof(*dest->touches));
> -
> - memcpy(dest->touches,
> - src->touches,
> - dest->count * sizeof(*dest->touches));
> -
> - if (cmp)
> - qsort(dest->touches,
> - dest->count,
> - sizeof(*dest->touches),
> - cmp);
> -
> - return dest;
> -}
> -
> -static inline struct touch*
> -tap_data_new_touch(struct tap_data *tap_data)
> -{
> - tap_data->count++;
> - if (tap_data->touches_sz < tap_data->count) {
> - tap_data->touches_sz += 50;
> - tap_data->touches = realloc(tap_data->touches,
> - tap_data->touches_sz *
> sizeof(*tap_data->touches));
> - if (tap_data->touches == NULL) {
> - error("Allocation error. Oops\n");
> - abort();
> - }
> - memset(&tap_data->touches[tap_data->count - 1],
> - 0,
> - sizeof(*tap_data->touches));
> - }
> -
> - return &tap_data->touches[tap_data->count - 1];
> -}
> -
> -static int
> -sort_by_time_delta(const void *ap, const void *bp)
> -{
> - const struct touch *a = ap;
> - const struct touch *b = bp;
> - uint32_t da, db;
> -
> - da = touch_tdelta_ms(a);
> - db = touch_tdelta_ms(b);
> -
> - return da == db ? 0 : da > db ? 1 : -1;
> -}
> -
> -static inline void
> -print_statistics(struct tap_data *tap_data)
> -{
> - uint64_t delta_sum = 0;
> - uint32_t average;
> - uint32_t max = 0,
> - min = UINT_MAX;
> - struct tap_data *data_sorted_tdelta;
> - struct touch *t,
> - *median,
> - *pc90,
> - *pc95;
> -
> - if (tap_data->count == 0) {
> - error("No tap data available.\n");
> - return;
> - }
> -
> - tap_data_for_each(tap_data, t) {
> - uint32_t delta = touch_tdelta_ms(t);
> -
> - delta_sum += delta;
> - max = max(delta, max);
> - min = min(delta, min);
> - }
> -
> - average = delta_sum/tap_data_ntouches(tap_data);
> -
> - printf("Time:\n");
> - printf(" Max delta: %dms\n", max);
> - printf(" Min delta: %dms\n", min);
> - printf(" Average delta: %dms\n", average);
> -
> - /* Median, 90th, 95th percentile, requires sorting by time delta */
> - data_sorted_tdelta = tap_data_duplicate_sorted(tap_data,
> - sort_by_time_delta);
> - median = tap_data_get_touch(tap_data,
> - tap_data_ntouches(tap_data)/2);
> - pc90= tap_data_get_touch(tap_data,
> - tap_data_ntouches(tap_data) * 0.9);
> - pc95 = tap_data_get_touch(tap_data,
> - tap_data_ntouches(tap_data) * 0.95);
> - printf(" Median delta: %dms\n", touch_tdelta_ms(median));
> - printf(" 90th percentile: %dms\n", touch_tdelta_ms(pc90));
> - printf(" 95th percentile: %dms\n", touch_tdelta_ms(pc95));
> -
> - tap_data_free(&data_sorted_tdelta);
> -}
> -
> -static inline void
> -print_dat(struct tap_data *tap_data)
> -{
> - unsigned int i;
> - struct touch *t;
> - struct tap_data *sorted;
> -
> - printf("# libinput-measure-touchpad-tap (v%s)\n",
> LIBINPUT_VERSION);
> - printf("# File contents:\n"
> - "# This file contains multiple prints of the data in
> different\n"
> - "# sort order. Row number is index of touch point within
> each group.\n"
> - "# Comparing data across groups will result in invalid
> analysis.\n"
> - "# Columns (1-indexed):\n");
> - printf("# Group 1, sorted by time of occurence\n"
> - "# 1: touch down time in ms, offset by first event\n"
> - "# 2: touch up time in ms, offset by first event\n"
> - "# 3: time delta in ms\n");
> - printf("# Group 2, sorted by touch down-up delta time
> (ascending)\n"
> - "# 4: touch down time in ms, offset by first event\n"
> - "# 5: touch up time in ms, offset by first event\n"
> - "# 6: time delta in ms\n");
> -
> - sorted = tap_data_duplicate_sorted(tap_data, sort_by_time_delta);
> -
> - for (i = 0; i < tap_data_ntouches(tap_data); i++) {
> - t = tap_data_get_touch(tap_data, i);
> - printf("%d %d %d ",
> - t->tdown,
> - t->tup,
> - touch_tdelta_ms(t));
> -
> - t = tap_data_get_touch(sorted, i);
> - printf("%d %d %d ",
> - t->tdown,
> - t->tup,
> - touch_tdelta_ms(t));
> -
> - printf("\n");
> - }
> -
> - tap_data_free(&sorted);
> -}
> -
> -static inline void
> -handle_btn_touch(struct tap_data *tap_data,
> - struct libevdev *evdev,
> - const struct input_event *ev)
> -{
> -
> - if (ev->value) {
> - struct touch *new_touch = tap_data_new_touch(tap_data);
> -
> - new_touch->tdown = us2ms(tv2us(&ev->time)) -
> tap_data->toffset;
> - } else {
> - struct touch *current = tap_data_get_current_touch(tap
> _data);
> -
> - msg("\rTouch sequences detected: %d", tap_data->count);
> -
> - current->tup = us2ms(tv2us(&ev->time)) - tap_data->toffset;
> - }
> -}
> -
> -static inline bool
> -handle_key(struct tap_data *tap_data,
> - struct libevdev *evdev,
> - const struct input_event *ev)
> -{
> - switch (ev->code) {
> - case BTN_TOOL_DOUBLETAP:
> - case BTN_TOOL_TRIPLETAP:
> - case BTN_TOOL_QUADTAP:
> - case BTN_TOOL_QUINTTAP:
> - error("This tool only supports single-finger taps.
> Aborting.\n");
> - return false;
> - case BTN_TOUCH:
> - handle_btn_touch(tap_data, evdev, ev);
> - break;
> - default:
> - break;
> - }
> -
> - return true;
> -}
> -
> -static inline bool
> -handle_abs(struct tap_data *tap_data,
> - struct libevdev *evdev,
> - const struct input_event *ev)
> -{
> - return true;
> -}
> -
> -static inline bool
> -handle_event(struct tap_data *tap_data,
> - struct libevdev *evdev,
> - const struct input_event *ev)
> -{
> - bool rc = true;
> -
> - if (tap_data->toffset == 0)
> - tap_data->toffset = us2ms(tv2us(&ev->time));
> -
> - switch (ev->type) {
> - default:
> - error("Unexpected event %s %s (%d, %d). Aborting.\n",
> - libevdev_event_type_get_name(ev->type),
> - libevdev_event_code_get_name(ev->type, ev->code),
> - ev->type,
> - ev->code);
> - break;
> - case EV_KEY:
> - rc = handle_key(tap_data, evdev, ev);
> - break;
> - case EV_ABS:
> - rc = handle_abs(tap_data, evdev, ev);
> - break;
> - case EV_SYN:
> - rc = true;
> - break;
> - }
> -
> - return rc;
> -}
> -
> -static int
> -loop(struct tap_data *data, const char *path)
> -{
> - struct libevdev *evdev;
> - struct pollfd fds[2];
> - sigset_t mask;
> - int fd;
> - int rc;
> -
> - fd = open(path, O_RDONLY|O_NONBLOCK);
> - if (fd < 0) {
> - error("Failed to open device: %s\n", strerror(errno));
> - return EXIT_FAILURE;
> - }
> -
> - rc = libevdev_new_from_fd(fd, &evdev);
> - if (rc < 0) {
> - error("Failed to init device: %s\n", strerror(-rc));
> - close(fd);
> - return EXIT_FAILURE;
> - }
> - libevdev_set_clock_id(evdev, CLOCK_MONOTONIC);
> -
> - fds[0].fd = fd;
> - fds[0].events = POLLIN;
> -
> - sigemptyset(&mask);
> - sigaddset(&mask, SIGINT);
> - fds[1].fd = signalfd(-1, &mask, SFD_NONBLOCK);
> - fds[1].events = POLLIN;
> -
> - sigprocmask(SIG_BLOCK, &mask, NULL);
> -
> - rc = EXIT_FAILURE;
> -
> - error("Ready for recording data.\n"
> - "Tap the touchpad multiple times with a single finger
> only.\n"
> - "For useful data we recommend at least 20 taps.\n"
> - "Ctrl+C to exit\n");
> -
> - while (poll(fds, 2, -1)) {
> - struct input_event ev;
> - int rc;
> -
> - if (fds[1].revents)
> - break;
> -
> - do {
> - rc = libevdev_next_event(evdev,
> LIBEVDEV_READ_FLAG_NORMAL, &ev);
> - if (rc == LIBEVDEV_READ_STATUS_SYNC) {
> - error("Error: cannot keep up\n");
> - goto out;
> - } else if (rc == LIBEVDEV_READ_STATUS_SUCCESS) {
> - if (!handle_event(data, evdev, &ev))
> - goto out;
> - } else if (rc != -EAGAIN && rc < 0) {
> - error("Error: %s\n", strerror(-rc));
> - goto out;
> - }
> - } while (rc != -EAGAIN);
> - }
> -
> - rc = EXIT_SUCCESS;
> -out:
> - close(fd);
> - if (evdev)
> - libevdev_free(evdev);
> -
> - printf("\n");
> -
> - return rc;
> -}
> -
> -static inline void
> -usage(void)
> -{
> - printf("Usage: libinput measure touchpad-tap [--help]
> [/dev/input/event0]\n");
> -}
> -
> -int
> -main(int argc, char **argv)
> -{
> - struct tap_data *tap_data;
> - char path[PATH_MAX];
> - int option_index = 0;
> - const char *format = "summary";
> - int rc;
> -
> - while (1) {
> - enum opts {
> - OPT_HELP,
> - OPT_FORMAT,
> - };
> - static struct option opts[] = {
> - { "help", no_argument, 0, OPT_HELP },
> - { "format", required_argument, 0, OPT_FORMAT},
> - { 0, 0, 0, 0 },
> - };
> - int c;
> -
> - c = getopt_long(argc, argv, "", opts, &option_index);
> - if (c == -1)
> - break;
> -
> - switch(c) {
> - case OPT_HELP:
> - usage();
> - return EXIT_SUCCESS;;
> - case OPT_FORMAT:
> - format = optarg;
> - break;
> - default:
> - usage();
> - return EXIT_FAILURE;
> - }
> - }
> -
> - if (streq(format, "summary")) {
> - print_dat_file = false;
> - } else if (streq(format, "dat")) {
> - print_dat_file = true;
> - } else {
> - error("Unknown print format '%s'\n", format);
> - return EXIT_FAILURE;
> - }
> -
> - if (optind == argc) {
> - if (!find_touchpad_device(path, sizeof(path))) {
> - error("Failed to find a touchpad device.\n");
> - return EXIT_FAILURE;
> - }
> - } else {
> - snprintf(path, sizeof(path), "%s", argv[optind]);
> - if (!is_touchpad_device(path)) {
> - error("Device is not a touchpad.\n");
> - return EXIT_FAILURE;
> - }
> - }
> -
> - if (!isatty(STDOUT_FILENO)) {
> - pdest = stderr;
> - } else {
> - pdest = stdout;
> - setbuf(stdout, NULL);
> - }
> -
> - tap_data = tap_data_new();
> - rc = loop(tap_data, path);
> -
> - if (rc != EXIT_SUCCESS)
> - goto out;
> -
> - msg("\n");
> -
> - if (print_dat_file)
> - print_dat(tap_data);
> - else
> - print_statistics(tap_data);
> -
> -out:
> - tap_data_free(&tap_data);
> -
> - return rc;
> -}
> --
> 2.13.6
>
> _______________________________________________
> wayland-devel mailing list
> wayland-devel at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/wayland-devel
>
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