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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>
Copyright (c) 2025 Mattias Andrée <m@maandree.se>
*/
#include "common.h"
struct location_state {
struct location loc;
};
static int
location_manual_init(struct location_state **state)
{
*state = malloc(sizeof(**state));
if (*state == NULL) return -1;
(*state)->loc.lat = NAN;
(*state)->loc.lon = NAN;
return 0;
}
static int
location_manual_start(struct location_state *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(struct location_state *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(struct location_state *state, const char *key,
const char *value)
{
/* Parse float value */
char *end;
double v;
errno = 0;
v = strtod(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(struct location_state *state)
{
return -1;
}
static int
location_manual_handle(
struct location_state *state, struct location *location, int *available)
{
*location = state->loc;
*available = 1;
return 0;
}
const struct location_provider manual_location_provider = {
"manual",
&location_manual_init,
&location_manual_start,
&location_manual_free,
&location_manual_print_help,
&location_manual_set_option,
&location_manual_get_fd,
&location_manual_handle
};
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