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#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <unistd.h>
#include <signal.h>
#include "pervasive.h"
#include "error.h"
#include "config.h"
#include "input.h"
#include "relabsd_device.h"
static void handle_relative_axis_event
(
struct relabsd_config * const conf,
const struct relabsd_device * const dev,
unsigned int const input_type,
unsigned int const input_code,
int value
)
{
unsigned int abs_code;
enum relabsd_axis rad_code;
rad_code = relabsd_axis_convert_evdev_rel(input_code, &abs_code);
switch (relabsd_config_filter(conf, rad_code, &value))
{
case -1:
/* 'conf' doesn't want the event to be transmitted. */
break;
case 0:
/* 'conf' wants the event to be transmitted as is. */
relabsd_device_write_evdev_event(dev, input_type, input_code, value);
break;
case 1:
/* 'conf' allows the value to be emitted */
relabsd_device_write_evdev_event(dev, EV_ABS, abs_code, value);
break;
}
}
static void convert_input
(
struct relabsd_config * const conf,
struct relabsd_input * const input,
const struct relabsd_device * const dev
)
{
unsigned int input_type, input_code;
int value;
RELABSD_S_DEBUG(RELABSD_DEBUG_PROGRAM_FLOW, "Handling input events...");
input->timed_out = 1;
while (RELABSD_RUN == 1)
{
if (conf->enable_timeout)
{
switch (relabsd_input_wait_for_next_event(input, conf))
{
case 1:
input->timed_out = 0;
break;
case 0:
relabsd_device_set_axes_to_zero(dev, conf);
input->timed_out = 1;
break;
case -1:
continue;
}
}
if (relabsd_input_read(input, &input_type, &input_code, &value) < 0)
{
/*
* The next event should not be retransmitted, or some kind of error
* happened.
*/
/* TODO: error handling. */
continue;
}
if (input_type == EV_REL)
{
/* We might have to convert the event. */
handle_relative_axis_event(conf, dev, input_type, input_code, value);
}
else
{
/* Any other event is retransmitted as is. */
relabsd_device_write_evdev_event(dev, input_type, input_code, value);
}
}
}
int relabsd_server_conversion_loop
(
struct relabsd_server server [const static 1]
)
{
return 0;
}
int wait_for_next_event
(
const struct relabsd_physical_device * const input,
const struct relabsd_config * const config
)
{
int ready_fds;
const int old_errno = errno;
fd_set ready_to_read;
struct timeval curr_timeout;
FD_ZERO(&ready_to_read);
FD_SET(input->fd, &ready_to_read);
/* call to select may alter timeout */
memcpy
(
(void *) &(curr_timeout),
(const void *) &(config->timeout),
sizeof(struct timeval)
);
errno = 0;
RELABSD_S_ERROR
(
"Waiting for input to be ready..."
);
ready_fds = select
(
(input->fd + 1),
&ready_to_read,
(fd_set *) NULL,
(fd_set *) NULL,
(input->timed_out) ? NULL : &(curr_timeout)
);
if (errno != 0)
{
RELABSD_ERROR
(
"Unable to wait for timeout: %s (errno: %d).",
strerror(errno),
errno
);
if (errno == EINTR)
{
/* Signal interruption? */
}
else
{
/* TODO: error message */
}
errno = old_errno;
return -1;
}
if (ready_fds == -1)
{
/* TODO: error message */
RELABSD_S_ERROR
(
"Unable to wait for timeout, yet errno was not set to anything."
);
errno = old_errno;
return -1;
}
RELABSD_ERROR
(
"Input is ready, ready_fds = %d", ready_fds
);
return ready_fds;
}
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