106 lines
2.8 KiB
C++
Executable File
106 lines
2.8 KiB
C++
Executable File
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <poll.h>
|
|
#include <string.h>
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/types.h>
|
|
|
|
#include <linux/input.h>
|
|
|
|
#include "InputEventReader.h"
|
|
#include "nusensors.h"
|
|
|
|
/*****************************************************************************/
|
|
|
|
struct input_event;
|
|
|
|
InputEventCircularReader::InputEventCircularReader(size_t numEvents)
|
|
: mBuffer(new input_event[numEvents * 2]),
|
|
|
|
mBufferEnd(mBuffer + numEvents),
|
|
mHead(mBuffer),
|
|
mCurr(mBuffer),
|
|
mFreeSpace(numEvents)
|
|
{
|
|
D("Entered : numEvents = %d.", numEvents);
|
|
}
|
|
|
|
InputEventCircularReader::~InputEventCircularReader()
|
|
{
|
|
delete [] mBuffer;
|
|
}
|
|
|
|
ssize_t InputEventCircularReader::fill(int fd)
|
|
{
|
|
size_t numEventsRead = 0;
|
|
if (mFreeSpace) {
|
|
const ssize_t nread = read(fd, mHead, mFreeSpace * sizeof(input_event));
|
|
if (nread<0 || nread % sizeof(input_event)) {
|
|
// we got a partial event!!
|
|
return nread<0 ? -errno : -EINVAL;
|
|
}
|
|
|
|
numEventsRead = nread / sizeof(input_event);
|
|
// dumpEvents(mHead, numEventsRead);
|
|
D("nread = %ld, numEventsRead = %d.", nread, numEventsRead);
|
|
if (numEventsRead) {
|
|
mHead += numEventsRead;
|
|
mFreeSpace -= numEventsRead;
|
|
if (mHead > mBufferEnd) {
|
|
size_t s = mHead - mBufferEnd;
|
|
memcpy(mBuffer, mBufferEnd, s * sizeof(input_event));
|
|
mHead = mBuffer + s;
|
|
}
|
|
}
|
|
}
|
|
|
|
return numEventsRead;
|
|
}
|
|
|
|
ssize_t InputEventCircularReader::readEvent(input_event const** events)
|
|
{
|
|
*events = mCurr;
|
|
ssize_t available = (mBufferEnd - mBuffer) - mFreeSpace;
|
|
return available ? 1 : 0;
|
|
}
|
|
|
|
void InputEventCircularReader::next()
|
|
{
|
|
mCurr++;
|
|
mFreeSpace++;
|
|
if (mCurr >= mBufferEnd) {
|
|
mCurr = mBuffer;
|
|
}
|
|
}
|
|
|
|
void InputEventCircularReader::dumpEvents(input_event const * events, int eventsNum)
|
|
{
|
|
D("to dump %d events :", eventsNum);
|
|
int i = 0;
|
|
input_event* current = NULL;
|
|
for ( i = 0; i < eventsNum; i++ )
|
|
{
|
|
current = (input_event*)events + i;
|
|
D("event '%d' : type : 0x%x, code : 0x%x.", i, current->type, current->code);
|
|
}
|
|
};
|
|
|