Add options parsing module

impl/CMakeLists.txt

@@ -10,6 +10,8 @@ include_directories(src)
 set(sources
 	src/utils.c
 	src/utils.h
+	src/options.c
+	src/options.h
 	src/main.c
 	src/results.h
 	src/config.h

impl/src/main.c

@@ -12,6 +12,7 @@
 #include <signal.h>
 
 #include "utils.h"
+#include "options.h"
 #include "layer1/tx.h"
 #include "layer1/rx.h"
 
@@ -200,13 +201,19 @@ static result_t transmit_in_chunks(sdr_ctx_t *sdr, const float complex *samples,
 }
 
 
-int main(void)
+int main(int argc, char **argv)
 {
 	layer1_tx_t tx;
 	layer1_rx_t rx;
 
 	sdr_ctx_t   sdr;
 
+	int parsed_options = options_parse(argc, argv);
+	fprintf(stderr, "%d options parsed.\n", parsed_options);
+	if(parsed_options < 0) {
+		return EXIT_FAILURE;
+	}
+
 	bool on_air = true;
 
 	debug_fd = open("/tmp/dump.cf32", O_CREAT | O_WRONLY | O_TRUNC);

impl/src/options.c

@@ -0,0 +1,37 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <stdint.h>
+
+#include "options.h"
+
+static uint32_t m_flags;
+
+int options_parse(int argc, char **argv)
+{
+	int opt;
+	int nparsed = 0;
+	while((opt = getopt(argc, argv, "c")) != -1) {
+		switch(opt) {
+			case 'c':
+				m_flags |= (1 << OPTIONS_FLAG_IS_CENTRAL_NODE);
+				break;
+
+			default:
+				fprintf(stderr,
+						"Usage: %s [-c]\n\n"
+						"  -c     Makes this node a central node (base station).\n",
+						argv[0]);
+				exit(EXIT_FAILURE);
+		}
+
+		nparsed++;
+	}
+
+	return nparsed;
+}
+
+bool options_is_flag_set(options_flag_t flag)
+{
+	return (m_flags & (1 << flag)) != 0;
+}

impl/src/options.h

@@ -0,0 +1,14 @@
+#ifndef OPTIONS_H
+#define OPTIONS_H
+
+#include <stdbool.h>
+
+typedef enum {
+	OPTIONS_FLAG_IS_CENTRAL_NODE,
+} options_flag_t;
+
+int options_parse(int argc, char **argv);
+
+bool options_is_flag_set(options_flag_t flag);
+
+#endif // OPTIONS_H