added commandline arguments and deleted target

src/args.c

@@ -0,0 +1,84 @@
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "args.h"
+
+extern char* version;
+
+static void handle_version() {
+  printf("Sanke version %s\n", version);
+  exit(0);
+}
+
+static void set_width(Arguments* args, char* width_str) {
+  printf("width_str: %s\n", width_str);
+  int width = atoi(width_str);
+  if (width < 10) {
+    printf("Width must be between 10 and 50. Was %d.\n", width);
+    exit(0);
+  }
+
+  args->width = width;
+}
+
+static void set_height(Arguments* args, char* height_str) {
+  int height = atoi(height_str);
+  if (height < 10) {
+    printf("Width must be between 10 and 50. Was %d.\n", height);
+    exit(0);
+  }
+
+  args->height = height;
+}
+
+static void set_speed(Arguments* args, char* speed_str) {
+  int squares_per_second = atoi(speed_str);
+  if (squares_per_second < 1 || squares_per_second > 1000) {
+    printf("Speed must be between 1 and 1000. Was %d.\n", squares_per_second);
+    exit(0);
+  }
+
+  args->sleep_ms = 1000 / squares_per_second;
+}
+
+Arguments cmd_args(int argc, char** argv) {
+  Arguments args = {
+    .width = 15,
+    .height = 15,
+    .sleep_ms = 150
+  };
+
+  for (int i = 1; i < argc; i++) {
+    if (
+        strcmp(argv[i], "--version") == 0
+        || strcmp(argv[i], "-v") == 0
+        )
+    {
+      handle_version();
+
+    } else if (
+        strcmp(argv[i], "--width") == 0
+        || strcmp(argv[i], "-w") == 0
+        )
+    {
+      set_width(&args, argv[i + 1]);
+
+    } else if (
+        strcmp(argv[i], "--height") == 0
+        || strcmp(argv[i], "-h") == 0
+        )
+    {
+      set_height(&args, argv[i + 1]);
+
+    } else if (
+        strcmp(argv[i], "--speed") == 0
+        || strcmp(argv[i], "-s") == 0
+        )
+    {
+      set_speed(&args, argv[i + 1]);
+    }
+  }
+
+  return args;
+}