update

1 files changed, 33 insertions, 0 deletions

diff --git a/src/cli.c b/src/cli.c
new file mode 100644
index 0000000..b1849ec
--- /dev/null
+++ b/src/cli.c
@@ -0,0 +1,33 @@
+#include "cli.h"
+
+#include <errno.h>
+#include <getopt.h>
+#include <stdbool.h>
+#include <stdio.h>
+
+cli_arguments cli_parse_arguments(const char *const argv[], const int argc) {
+    errno = 0;
+    cli_arguments args = {
+        .is_debug_mode = false,
+    };
+
+    int opt = -1;
+    opterr = 0;  // Suppress getopt's built-in invalid opt message
+    while ((opt = getopt(argc, (char *const *)argv, "dh")) != -1) {
+        switch (opt) {
+            case 'd':
+                args.is_debug_mode = true;
+                break;
+            case '?':
+                (void)fprintf(stderr, "error: unknown option `-%c'\n", optopt);
+                // fall through
+            case 'h':
+                // fall through
+            default:
+                (void)fprintf(stderr, "usage: %s [-d]\n", BINARY);
+                errno = 1;
+        }
+    }
+
+    return args;
+}