Commit graph

473 commits

Author SHA1 Message Date
Peter Hutterer
ef24f328d8 tools: fix a compiler warning
event-debug.c: At top level:
event-debug.c:129:1: warning: ‘static’ is not at beginning of declaration
[-Wold-style-declaration]
 const static struct libinput_interface interface = {
  ^

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-06-03 11:01:05 +10:00
Peter Hutterer
50a0f79fe3 test: fix a bunch of "unused variable" warnings
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-06-03 11:01:05 +10:00
Peter Hutterer
b2c82046fd test: use the TEST_CFLAGS for all tests
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-06-03 11:01:05 +10:00
Peter Hutterer
0d31f9e8b1 test: compiler warning fixes
misc.c: In function ‘create_simple_test_device’:
misc.c:71:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  while ((type = va_arg(args, unsigned int)) != -1 &&
                                                      ^
misc.c:72:54: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         (code = va_arg(args, unsigned int)) != -1) {
2014-06-03 11:01:04 +10:00
Peter Korsgaard
fa8439e644 evdev: Provide fallback definition for KEY_MICMUTE
KEY_MICMUTE was added relatively recently (3.1 with 33009557bd: Add
KEY_MICMUTE and enable it on Lenovo X220), so provide a fallback definition
similar to how we do it for KEY_LIGHTS_TOGGLE to fix compilation with older
toolchains.

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-06-02 23:23:26 +02:00
Peter Korsgaard
0d02b13ec2 evdev: Use correct fallback value for KEY_LIGHTS_TOGGLE
The kernel defines KEY_LIGHTS_TOGGLE as 0x21e, not 0x160 (which is KEY_OK).

Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
2014-06-02 23:23:13 +02:00
Peter Hutterer
bd4550cfb2 touchpad: fix two indentation issues in the header
7 whitespace -> tab

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-06-02 14:01:30 +10:00
Hans de Goede
9cf548e770 touchpad: Add support for top softbutton area
Add support for the top softbutton area found on some laptops.

For details of how this works, see the updated
doc/touchpad-softbutton-state-machine.svg diagram.

Basically this mirrors the state-machine for the bottom softbutton area, with
one exception, if a finger stays at least inner timeout milliseconds in the
top button area and then moves out of it, it will be ignored rather then
become the pointer. This is done so that people using the top buttons together
with a trackstick and accidentally move their finger out of the upper area
don't get spurious pointer movements from the finger on the trackpad.

This behavior is indentical to xf86-input-synaptics, which also ignores
movements from touches which start in the top button area.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-06-02 14:01:23 +10:00
Hans de Goede
cb05a3aa91 touchpad: Rename some variables and functions
Rename some clickpad softbutton area variables to have bottom in their
name, this is a preperation patch for adding top softbutton area support.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-06-02 14:01:14 +10:00
Peter Hutterer
42bedd689a tools: add explicit libudev dependency to event-debug
The header is pulled in by libinput.h, the libs by libinput but make this
explicit.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-30 15:18:16 +10:00
Peter Hutterer
65a89424ca configure: simplify a condition
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-30 15:18:11 +10:00
Peter Hutterer
055b1c8bc9 Replace log_bug with per-component bug macros
When we knowingly hit a bug, we should know what the bug is caused by. Log
that in a standardized fashion.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-30 11:55:23 +10:00
Peter Hutterer
b52b9440ee test: disable CK_FORK for the valgrind runs
I'm not sure what exactly is happening here, but while valgrind seems to run
fine in normal mode, the build from make distcheck fails with rather random
errors. Disabling CK_FORK seems to help, but more investigation is needed.
Meanwhile, this makes distcheck succeed again.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-30 11:55:23 +10:00
Peter Hutterer
fe077fc4a0 test: restore log priority after each test
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-30 11:55:23 +10:00
Peter Hutterer
ba6f0b566c Remove old touchpad code
With the addition of software buttons for clickpads, the new touchpad code has
overtaken this driver in terms of features. The older driver was disabled in
6a61032625.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-30 11:55:23 +10:00
Peter Hutterer
90b8de4ddd evdev: INPUT_PROP_DIRECT devices can't be touchpads
Devices that are direct input devices are marked by the kernel with the
INPUT_PROP_DIRECT property. Touchpads are always indirect input devices, so
let's do the easiest check first before we try device-specific capabilities.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-30 07:11:59 +10:00
Jonas Ådahl
eae6bec344 filter: Ignore non-suitable trackers when calculating initial velocity
calculate_velocity() didn't skip pointer trackers far away in time when
calculating the initial velocity. This check was done later when
iterating the rest, so while at it, simplify the function by doing both
iterations in one single loop.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-29 13:06:42 +02:00
Jonas Ådahl
acce2da38c filter: Fix get_direction for short vectors
Short vectors alongside the x axis produced inverted directions.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-29 13:06:39 +02:00
Jonas Ådahl
e18e9d56a8 touchpad: Make anisotropic motion deltas isotropic
The x and y absolute axis may have different resolutions, meaning 1 unit
long motion delta on one axis is not physically as long as 1 unit motion
delta on the other axis.

In order to make these anisotropic input motion deltas output as isotropic
motion deltas, apply scaling to one of the axis making it have the same
dimension as the other, before passing it through the motion filter
which assumes all deltas are isotropic.

https://bugs.freedesktop.org/show_bug.cgi?id=79056

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-29 13:06:36 +02:00
Jonas Ådahl
505e92b1a5 Add basic mouse pointer acceleration
This patch reimplements the simple smooth pointer acceleration profile
from X.org xserver. The algorithm is identical to the classic profile
with a non-zero pointer acceleration threshold.

When support for changable parameters is in place, to get a pointer
acceleration the same as the default classic profile of X.org a
polynomial acceleration profile should be used for when the threshold
parameter is zero.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-29 13:06:32 +02:00
Jonas Ådahl
d4b66061b3 test: Queue two motion events in pointer event conversion test
Pointer acceleration filters may absorb the first event, so queue two,
just in case.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-29 13:06:26 +02:00
Jonas Ådahl
a8d95a1afb test: Make relative pointer event test more accepting
A test cannot exactly predict the resulting motion event from a given
evdev event series without having to reimplement the acceleration
algorithm. To still be able to test that sane relative motion events are
produced, check that the length and direction of the resulting motion
event vectors are close to the same as the expected vectors.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-29 13:06:23 +02:00
Jonas Ådahl
7cb4540916 filter: Add motion filter destruction helper
Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-29 13:06:16 +02:00
Hans de Goede
bdb13fd1d3 touchpad: Stop scrolling on a button click / tap
On a button click / tap the scrolling event handler no longer gets called,
ensure that any in progress scrolling is stopped.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-27 16:35:03 +10:00
Hans de Goede
8d41230d65 touchpad: Refactor tp_post_scroll_events()
Put the actual scroll event posting in the straight path.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-27 16:34:58 +10:00
Hans de Goede
ecb132fef6 touchpad: Fix sending of scroll stop events
Setting tp->scroll.direction = 0 before checking tp->scroll.direction
to see if we need to send stop scroll events for vert / horz scrolling does
not really work well.

Also we need to check direction with an axis mask, not the axis number.

While at it also add a tp_stop_scroll_events() helper function for this.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-27 16:34:54 +10:00
Hans de Goede
cee3a482f3 touchpad: Clear touches being the pointer when doing 2 finger scrolling
When doing 2 finger scrolling we don't want any spurious movement events after
scrolling. touchpad_2fg_no_motion tests for this, but it lifts touch 0
(which is the pointer as it came down first) first, so it only catches the
case where touch 1 suddenly gets promoted to being the pointer.

However if touch 1 is lifted first, then touch 0 is still the pointer and
will cause spurious movement events. Swap the 2 litest_touch_up calls to
catch this (and make the test fail), and add code to clear the is_pointer
flag on all touched when doing 2 finger scrolling to fix it again.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-27 16:34:51 +10:00
Peter Hutterer
b389cc55be tools: plug leak in event-debug
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-27 16:27:02 +10:00
Jonas Ådahl
b064b05829 filter: Fix coding style
Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
2014-05-26 22:59:43 +02:00
Peter Hutterer
5082eaf250 Merge branch 'clickpad-improvements-v2' of git://people.freedesktop.org/~jwrdegoede/libinput 2014-05-23 08:51:29 +10:00
Jonas Ådahl
4e669bf246 touchpad: Make pointer movements a bit faster by default
Alter the so far hard coded parameters a bit to make the pointer
acceleration profile accelerate the pointer movement a bit more than
before.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 21:48:22 +02:00
Hans de Goede
89165da6d6 Change internal timestamps to uint64_t to properly deal with wrapping
We store timestamps in ms since system boot (CLOCK_MONOTONIC). This will wrap
after circa 50 days.

I've considered making our code wrapping safe, but that won't work. We also
use our internal timestamps to program timer-fds for timeouts. And we store
ms in a single integer but the kernel uses 2 integers, one for seconds and
one for usec/nanosec. So at 32 bits our ms containing integer will wrap
in 50 days, while the kernels seconds storing integer lasts a lot longer.
So when we wrap our ms timestamps, we will be programming the timer-fds
with a seconds value in the past.

So change all our internal timestamps to uint64_t to avoid the wrapping
when programming the timer-fds. Note that we move from 64-bit timestamps to
32-bit timestamps when calling the foo_notify_bar functions from
libinput-private.h. Having 64 bit timestamps has no use past this point,
since the wayland input protocol uses 32 bit timestamps (and clients will
have to deal with wrapping).

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:51:41 +02:00
Hans de Goede
ed6ccad449 touchpad: handle_timeouts: Remove unused return value
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:51:41 +02:00
Hans de Goede
a70ef98d57 touchpad: Remove clickpad clicked test from 2 finger scrolling handling
This is no longer needed now that we take the button area and pinned fingers
into account.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:51:41 +02:00
Hans de Goede
55b2ea65f3 touchpad: Ignore fingers in button area for 2 finger scroll
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:51:41 +02:00
Hans de Goede
bfe05ed4a6 touchpad: softbuttons: Deal with a click arriving before any touches
It is possible for a click to get reported before any related touch events
get reported, here is the relevant part of an evemu-record session on a T440s:

E: 3.985585 0000 0000 0000	# ------------ SYN_REPORT (0) ----------
E: 3.997419 0003 0039 -001	# EV_ABS / ABS_MT_TRACKING_ID   -1
E: 3.997419 0001 014a 0000	# EV_KEY / BTN_TOUCH            0
E: 3.997419 0003 0018 0000	# EV_ABS / ABS_PRESSURE         0
E: 3.997419 0001 0145 0000	# EV_KEY / BTN_TOOL_FINGER      0
E: 3.997419 0000 0000 0000	# ------------ SYN_REPORT (0) ----------
E: 5.117881 0001 0110 0001	# EV_KEY / BTN_LEFT             1
E: 5.117881 0000 0000 0000	# ------------ SYN_REPORT (0) ----------
E: 5.133422 0003 0039 0187	# EV_ABS / ABS_MT_TRACKING_ID   187
E: 5.133422 0003 0035 3098	# EV_ABS / ABS_MT_POSITION_X    3098
E: 5.133422 0003 0036 3282	# EV_ABS / ABS_MT_POSITION_Y    3282
E: 5.133422 0003 003a 0046	# EV_ABS / ABS_MT_PRESSURE      46
E: 5.133422 0001 014a 0001	# EV_KEY / BTN_TOUCH            1
E: 5.133422 0003 0000 3102	# EV_ABS / ABS_X                3102
E: 5.133422 0003 0001 3282	# EV_ABS / ABS_Y                3282
E: 5.133422 0003 0018 0046	# EV_ABS / ABS_PRESSURE         46
E: 5.133422 0001 0145 0001	# EV_KEY / BTN_TOOL_FINGER      1
E: 5.133422 0000 0000 0000	# ------------ SYN_REPORT (0) ----------

Notice the BTN_LEFT event all by itself!

To deal with this if a physical click registers before we get any touches,
wait for the first touch to resolve the click.

Also see the new activity diagram for the tp_post_softbutton_buttons
method which has been added to doc/touchpad-softbutton-state-machine.svg

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:51:41 +02:00
Hans de Goede
b9f6aed515 touchpad: post_button_events: Remove TOUCHPAD_EVENT_BUTTON_PRESS/RELEASE test
We already check for old != current everywhere, so this is not needed;
And in tp_post_softbutton_buttons we want to do delay button down reporting if
we don't have touch info yet in which case this check actually gets in the way.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:51:41 +02:00
Hans de Goede
a4bd36071e touchpad: Ignore non left clicks on clickpads
We should never get any non left button events on clickpads, but if we
do these might confuse our state, so complain about it and ignore these.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:51:41 +02:00
Hans de Goede
f6c3731f8a touchpad: Use INPUT_PROP_BUTTONPAD instead of checking for buttons
And warn if INPUT_PROP_BUTTONPAD mismatches right/middle buttons presence.

Also fix the bcm5974 to properly advertise INPUT_PROP_BUTTONPAD.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:45:22 +02:00
Hans de Goede
55d84420e2 touchpad: Rework is_pointer handling
We don't want touches in the button area to cause the pointer to move. So
instead of making a touch the pointer when it moves to TOUCH_BEGIN, wait
with making it the pointer until its buttons state moves to BUTTON_STATE_AREA.

Note that a touch in the main area of the touchpad will move to
BUTTON_STATE_AREA immediately. If software-buttons are not enabled, any finger
is in the BUTTON_STATE_AREA.

While at it also refactor the is_pointer setting in general, removing
code duplicition wrt checking that another touch is not already
the pointer on unpinning a finger, and add safeguards that unpinning
does not make a finger which is not in button state BUTTON_STATE_AREA the
pointer, nor that the button code makes a pinned finger the pointer.

All these sanity checks are combined into a new tp_button_active function,
since they should be taken into account for 2 finger scrolling, etc. too.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:45:01 +02:00
Peter Hutterer
e192ecc6e9 touchpad: Add clickpad-style software buttons
Almost all non Apple touchpads have visible markings for software button areas,
so limit clickfinger behavior to Apple clickpads, and implement software button
areas for others.

This is a slightly fancier implementation than the simplest model and ported
over from libtouchpad. It implements a state machine for the software buttons
with left and right buttons currently implemented. Buttons are oriented
left-to-right, in a horizontal bar. No random button placement allowed.

In general, the procedure is:
- if a finger sets down in the left button area, a click is a left click
- if a finger sets down in the right button area, a click is a right click
- if a finger leaves the button area, a click is a left click
- if a finger starts outside the button area, a click is a left click

Two timeouts are used to handle buttons more smoothly:
- if a finger sets down in a button area but "immediately" moves over
  to a different area, that area takes effect on a click.
- if a finger leaves a button area and "immediately" clicks or moves back into
  the area, the button still takes effect on a click.
- if a finger changes between areas and stays there for a timeout, that area
  takes effect on a click.

Note the button area states are named BOTTOM_foo to make it easier to later
add support for a top button area such as can be found on the Thinkpad [2-5]40
series.

Co-authored-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:44:55 +02:00
Peter Hutterer
2f9607a489 touchpad: save the active clickfinger button
To avoid having a button left press and a button right release if the number
of fingers changes.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-22 14:39:01 +02:00
Peter Hutterer
1c0805a559 doc: add state machine SVG to EXTRA_DIST
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-22 14:39:01 +02:00
Peter Hutterer
21d7b2b50a touchpad: move button-related code into a separate file
This is about to become more complicated with the support for software button
areas. Move it to a separate file to have it logically grouped together.
No functional changes.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-22 14:39:00 +02:00
Peter Hutterer
ae875520d1 touchpad: reset the tap timer_fd to -1 on destroy
No real effect, just for safety

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-22 14:39:00 +02:00
Peter Hutterer
cba4560566 touchpad: after a click, lock the finger to its current position
On clickpads, clicking the pad usually causes some motion events. To avoid
erroneous movements, lock all fingers into position on the click and don't
allow for motion events until a finger moves past a given threshold
(currently 2% of the touchpad diagonal).

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-05-22 14:39:00 +02:00
Peter Hutterer
4b089fbd67 touchpad: set ntouches for single-touch pads depending on key bits
A single-touch touchpad that provides BTN_TOOL_TRIPLETAP has 3 touches, etc.
There aren't a lot of these out there, but some touchpads don't have slots but
do provide two- or three-finger detection.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Jonas Ådahl <jadahl@gmail.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
2014-05-22 14:39:00 +02:00
Jonas Ådahl
40bae41159 configure.ac: libinput 0.2
Bump the libinput version and the libtool version.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
2014-05-22 08:10:42 +02:00
Jonas Ådahl
378cfb6066 configure.ac: Add libtool versioning setting to configure.ac
Add the explanatory description of the version components from libevdev
as well.

Signed-off-by: Jonas Ådahl <jadahl@gmail.com>
2014-05-22 08:09:41 +02:00
Carlos Olmedo Escobar
97af5c33a3 touchpad: check calloc result
Check the value returned by calloc.

Signed-off-by: Carlos Olmedo Escobar <carlos.olmedo.e@gmail.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
2014-04-30 13:24:27 +10:00