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/* location-manual.c -- Manual location provider source
This file is part of Redshift.
Redshift 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 Foundation, either version 3 of the License, or
(at your option) any later version.
Redshift 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 Redshift. If not, see <http://www.gnu.org/licenses/>.
Copyright (c) 2010-2017 Jon Lund Steffensen <jonlst@gmail.com>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>
#include <errno.h>
#include "common.h"
#ifdef ENABLE_NLS
# include <libintl.h>
# define _(s) gettext(s)
#else
# define _(s) s
#endif
typedef struct {
location_t loc;
} location_manual_state_t;
static int
location_manual_init(location_manual_state_t **state)
{
*state = malloc(sizeof(location_manual_state_t));
if (*state == NULL) return -1;
location_manual_state_t *s = *state;
s->loc.lat = NAN;
s->loc.lon = NAN;
return 0;
}
static int
location_manual_start(location_manual_state_t *state)
{
/* Latitude and longitude must be set */
if (isnan(state->loc.lat) || isnan(state->loc.lon)) {
fputs(_("Latitude and longitude must be set.\n"), stderr);
exit(EXIT_FAILURE);
}
return 0;
}
static void
location_manual_free(location_manual_state_t *state)
{
free(state);
}
static void
location_manual_print_help(FILE *f)
{
fputs(_("Specify location manually.\n"), f);
fputs("\n", f);
/* TRANSLATORS: Manual location help output
left column must not be translated */
fputs(_(" lat=N\t\tLatitude\n"
" lon=N\t\tLongitude\n"), f);
fputs("\n", f);
fputs(_("Both values are expected to be floating point numbers,\n"
"negative values representing west / south, respectively.\n"), f);
fputs("\n", f);
}
static int
location_manual_set_option(location_manual_state_t *state, const char *key,
const char *value)
{
/* Parse float value */
char *end;
errno = 0;
float v = strtof(value, &end);
if (errno != 0 || *end != '\0') {
fputs(_("Malformed argument.\n"), stderr);
return -1;
}
if (strcasecmp(key, "lat") == 0) {
state->loc.lat = v;
} else if (strcasecmp(key, "lon") == 0) {
state->loc.lon = v;
} else {
fprintf(stderr, _("Unknown method parameter: `%s'.\n"), key);
return -1;
}
return 0;
}
static int
location_manual_get_fd(location_manual_state_t *state)
{
return -1;
}
static int
location_manual_handle(
location_manual_state_t *state, location_t *location, int *available)
{
*location = state->loc;
*available = 1;
return 0;
}
const location_provider_t manual_location_provider = {
"manual",
(location_provider_init_func *)location_manual_init,
(location_provider_start_func *)location_manual_start,
(location_provider_free_func *)location_manual_free,
(location_provider_print_help_func *)location_manual_print_help,
(location_provider_set_option_func *)location_manual_set_option,
(location_provider_get_fd_func *)location_manual_get_fd,
(location_provider_handle_func *)location_manual_handle
};
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