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/*
This file is part of libevdevPlus.
Copyright (C) 2018 YukiWorkshop
This program is free software: you can redistribute it and/or modify
it under the terms of the MIT License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*/
#include "evdevPlus.hpp"
using namespace evdevPlus;
void EventDevice::Open(const std::string &path, int open_flags) {
int fd = open(path.c_str(), open_flags);
if (fd < 0)
throw std::runtime_error("failed to open device: " + std::string(strerror(errno)));
Open(fd);
}
void EventDevice::Open(int fd) {
if (!IsValidDevice(fd))
throw std::runtime_error("not a valid event device");
FD = fd;
Init();
}
void EventDevice::Close() {
if (FD != -1)
close(FD);
}
bool EventDevice::IsValidDevice(int fd) {
if (fcntl(fd, F_GETFD) == -1)
return false;
int _;
return ioctl(fd, EVIOCGVERSION, &_) == 0;
}
bool EventDevice::IsValidDevice() {
return IsValidDevice(FD);
}
void EventDevice::Init() {
if (ioctl(FD, EVIOCGVERSION, &DriverVersion))
throw std::runtime_error(std::string("EVIOCGVERSION") + " failed");
if (ioctl(FD, EVIOCGID, &(DeviceID.inputId)))
throw std::runtime_error(std::string("EVIOCGID") + " failed");
char name[256] = "Unknown";
ioctl(FD, EVIOCGNAME(sizeof(name)), name);
DeviceName = name;
long evtypes;
if (ioctl(FD, EVIOCGBIT(0, sizeof(long)), &evtypes) == -1)
throw std::runtime_error(std::string("EVIOCGBIT") + " failed");
// TODO
}
void EventDevice::Grab() {
if (ioctl(FD, EVIOCGRAB, 1))
throw std::runtime_error(std::string("EVIOCGRAB") + "failed");
}
void EventDevice::Ungrab() {
if (ioctl(FD, EVIOCGRAB, 0))
throw std::runtime_error(std::string("EVIOCGRAB") + "failed");
}
InputEvent EventDevice::Read() {
InputEvent ret;
ssize_t rc = read(FD, &ret.event, sizeof(input_event));
if (rc != sizeof(input_event)) {
if (rc < 0)
throw std::runtime_error(strerror(errno));
else
throw std::runtime_error("truncated read");
}
return ret;
}
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