Provide fundament for more advanced location providers.

1 files changed, 93 insertions, 0 deletions

diff --git a/src/location-manual.c b/src/location-manual.c
new file mode 100644
index 0000000..1eca22e
--- /dev/null
+++ b/src/location-manual.c
@@ -0,0 +1,93 @@
+/* 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  Jon Lund Steffensen <jonlst@gmail.com>
+*/
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+#include <string.h>
+#include <errno.h>
+
+#include "location-manual.h"
+
+#ifdef ENABLE_NLS
+# include <libintl.h>
+# define _(s) gettext(s)
+#else
+# define _(s) s
+#endif
+
+
+int
+location_manual_init(location_manual_state_t *state, char *args)
+{
+	state->lat = NAN;
+	state->lon = NAN;
+
+	/* Parse arguments. */
+	int count = 0;
+	while (args != NULL) {
+		if (count > 1) {
+			fputs(_("Too many arguments.\n"), stderr);
+			return -1;
+		}
+
+		char *next_arg = strchr(args, ':');
+		if (next_arg != NULL) *(next_arg++) = '\0';
+
+		/* Parse float value */
+		char *end;
+		errno = 0;
+		float value = strtof(args, &end);
+		if (errno != 0 || *end != '\0') {
+			fputs(_("Malformed argument.\n"), stderr);
+			return -1;
+		}
+
+		switch (count) {
+		case 0: state->lat = value; break;
+		case 1: state->lon = value; break;
+		}
+
+		args = next_arg;
+		count += 1;
+	}
+
+	/* Latitude and longitude must be set */
+	if (isnan(state->lat) || isnan(state->lon)) {
+		fputs(_("Latitude and longitude must be set.\n"), stderr);
+		exit(EXIT_FAILURE);
+	}
+
+	return 0;
+}
+
+void
+location_manual_free(location_manual_state_t *state)
+{
+}
+
+int
+location_manual_get_location(location_manual_state_t *state, float *lat,
+			     float *lon)
+{
+	*lat = state->lat;
+	*lon = state->lon;
+
+	return 0;
+}