Move options handling to separate file

Create options.c which contains functions for initializing and
parsing options from the command line and the configuration file.
Program options that were previously local variables in main() are
moved to the options_t struct.

1 files changed, 32 insertions, 0 deletions

diff --git a/src/redshift.h b/src/redshift.h
index 98f9f37..f597c67 100644
--- a/src/redshift.h
+++ b/src/redshift.h
@@ -23,6 +23,9 @@
 #include <stdio.h>
 #include <stdlib.h>
 
+/* The color temperature when no adjustment is applied. */
+#define NEUTRAL_TEMP  6500
+
 
 /* Location */
 typedef struct {
@@ -45,6 +48,35 @@ typedef struct {
 	float brightness;
 } color_setting_t;
 
+/* Program modes. */
+typedef enum {
+	PROGRAM_MODE_CONTINUAL,
+	PROGRAM_MODE_ONE_SHOT,
+	PROGRAM_MODE_PRINT,
+	PROGRAM_MODE_RESET,
+	PROGRAM_MODE_MANUAL
+} program_mode_t;
+
+/* Time range.
+   Fields are offsets from midnight in seconds. */
+typedef struct {
+	int start;
+	int end;
+} time_range_t;
+
+/* Transition scheme.
+   The solar elevations at which the transition begins/ends,
+   and the association color settings. */
+typedef struct {
+	double high;
+	double low;
+	int use_time; /* When enabled, ignore elevation and use time ranges. */
+	time_range_t dawn;
+	time_range_t dusk;
+	color_setting_t day;
+	color_setting_t night;
+} transition_scheme_t;
+
 
 /* Gamma adjustment method */
 typedef struct gamma_state gamma_state_t;