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location_driver.c
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location_driver.c
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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2017 - Daniel De Matteis
*
* RetroArch is free software: you can redistribute it and/or modify it under the terms
* of the GNU General Public License as published by the Free Software Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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. See the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along with RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
#include "location_driver.h"
#include "../configuration.h"
#include "../core.h"
#include "../driver.h"
#include "../retroarch.h"
#include "../list_special.h"
#include "../verbosity.h"
static const location_driver_t *location_drivers[] = {
#ifdef ANDROID
&location_android,
#endif
#ifdef HAVE_CORELOCATION
#if defined(HAVE_COCOA) || defined(HAVE_COCOATOUCH)
&location_corelocation,
#endif
#endif
&location_null,
NULL,
};
static const location_driver_t *location_driver;
static void *location_data;
/**
* location_driver_find_handle:
* @idx : index of driver to get handle to.
*
* Returns: handle to location driver at index. Can be NULL
* if nothing found.
**/
const void *location_driver_find_handle(int idx)
{
const void *drv = location_drivers[idx];
if (!drv)
return NULL;
return drv;
}
/**
* location_driver_find_ident:
* @idx : index of driver to get handle to.
*
* Returns: Human-readable identifier of location driver at index. Can be NULL
* if nothing found.
**/
const char *location_driver_find_ident(int idx)
{
const location_driver_t *drv = location_drivers[idx];
if (!drv)
return NULL;
return drv->ident;
}
/**
* config_get_location_driver_options:
*
* Get an enumerated list of all location driver names,
* separated by '|'.
*
* Returns: string listing of all location driver names,
* separated by '|'.
**/
const char* config_get_location_driver_options(void)
{
return char_list_new_special(STRING_LIST_LOCATION_DRIVERS, NULL);
}
void find_location_driver(void)
{
int i;
driver_ctx_info_t drv;
settings_t *settings = config_get_ptr();
drv.label = "location_driver";
drv.s = settings->arrays.location_driver;
driver_ctl(RARCH_DRIVER_CTL_FIND_INDEX, &drv);
i = (int)drv.len;
if (i >= 0)
location_driver = (const location_driver_t*)location_driver_find_handle(i);
else
{
if (verbosity_is_enabled())
{
unsigned d;
RARCH_ERR("Couldn't find any location driver named \"%s\"\n",
settings->arrays.location_driver);
RARCH_LOG_OUTPUT("Available location drivers are:\n");
for (d = 0; location_driver_find_handle(d); d++)
RARCH_LOG_OUTPUT("\t%s\n", location_driver_find_ident(d));
RARCH_WARN("Going to default to first location driver...\n");
}
location_driver = (const location_driver_t*)location_driver_find_handle(0);
if (!location_driver)
retroarch_fail(1, "find_location_driver()");
}
}
/**
* driver_location_start:
*
* Starts location driver interface..
* Used by RETRO_ENVIRONMENT_GET_LOCATION_INTERFACE.
*
* Returns: true (1) if successful, otherwise false (0).
**/
bool driver_location_start(void)
{
settings_t *settings = config_get_ptr();
if (location_driver && location_data && location_driver->start)
{
if (settings->bools.location_allow)
return location_driver->start(location_data);
runloop_msg_queue_push("Location is explicitly disabled.\n", 1, 180, true);
}
return false;
}
/**
* driver_location_stop:
*
* Stops location driver interface..
* Used by RETRO_ENVIRONMENT_GET_LOCATION_INTERFACE.
*
* Returns: true (1) if successful, otherwise false (0).
**/
void driver_location_stop(void)
{
if (location_driver && location_driver->stop && location_data)
location_driver->stop(location_data);
}
/**
* driver_location_set_interval:
* @interval_msecs : Interval time in milliseconds.
* @interval_distance : Distance at which to update.
*
* Sets interval update time for location driver interface.
* Used by RETRO_ENVIRONMENT_GET_LOCATION_INTERFACE.
**/
void driver_location_set_interval(unsigned interval_msecs,
unsigned interval_distance)
{
if (location_driver && location_driver->set_interval
&& location_data)
location_driver->set_interval(location_data,
interval_msecs, interval_distance);
}
/**
* driver_location_get_position:
* @lat : Latitude of current position.
* @lon : Longitude of current position.
* @horiz_accuracy : Horizontal accuracy.
* @vert_accuracy : Vertical accuracy.
*
* Gets current positioning information from
* location driver interface.
* Used by RETRO_ENVIRONMENT_GET_LOCATION_INTERFACE.
*
* Returns: bool (1) if successful, otherwise false (0).
**/
bool driver_location_get_position(double *lat, double *lon,
double *horiz_accuracy, double *vert_accuracy)
{
if (location_driver && location_driver->get_position
&& location_data)
return location_driver->get_position(location_data,
lat, lon, horiz_accuracy, vert_accuracy);
*lat = 0.0;
*lon = 0.0;
*horiz_accuracy = 0.0;
*vert_accuracy = 0.0;
return false;
}
void init_location(void)
{
rarch_system_info_t *system = runloop_get_system_info();
/* Resource leaks will follow if location interface is initialized twice. */
if (location_data)
return;
find_location_driver();
location_data = location_driver->init();
if (!location_data)
{
RARCH_ERR("Failed to initialize location driver. Will continue without location.\n");
location_driver_ctl(RARCH_LOCATION_CTL_UNSET_ACTIVE, NULL);
}
if (system->location_cb.initialized)
system->location_cb.initialized();
}
static void uninit_location(void)
{
rarch_system_info_t *system = runloop_get_system_info();
if (location_data && location_driver)
{
if (system->location_cb.deinitialized)
system->location_cb.deinitialized();
if (location_driver->free)
location_driver->free(location_data);
}
location_data = NULL;
}
bool location_driver_ctl(enum rarch_location_ctl_state state, void *data)
{
static bool location_driver_active = false;
static bool location_driver_data_own = false;
switch (state)
{
case RARCH_LOCATION_CTL_DESTROY:
location_driver_active = false;
location_driver_data_own = false;
location_driver = NULL;
break;
case RARCH_LOCATION_CTL_DEINIT:
uninit_location();
break;
case RARCH_LOCATION_CTL_SET_OWN_DRIVER:
location_driver_data_own = true;
break;
case RARCH_LOCATION_CTL_UNSET_OWN_DRIVER:
location_driver_data_own = false;
break;
case RARCH_LOCATION_CTL_OWNS_DRIVER:
return location_driver_data_own;
case RARCH_LOCATION_CTL_SET_ACTIVE:
location_driver_active = true;
break;
case RARCH_LOCATION_CTL_UNSET_ACTIVE:
location_driver_active = false;
break;
case RARCH_LOCATION_CTL_IS_ACTIVE:
return location_driver_active;
default:
break;
}
return true;
}