feat: standard argument parsing

core/standard.c

@@ -0,0 +1,29 @@
+#include "standard.h"
+#include "../config.h"
+#include "print.h"
+#include <stdlib.h>
+#include <string.h>
+
+int
+parse_standard_options (void (*usage) (), int argc, char **argv)
+{
+  for (int i = 1; i < argc; ++i)
+    {
+      if (strcmp (argv[i], "--help") == 0)
+        {
+          usage ();
+          exit (0);
+        }
+      else if (strcmp (argv[i], "--version") == 0)
+        {
+          printfn ("%s (%s) %s\nCopyright (C) %d %s.\n%s\n"
+                   "This is free software: you are free to change "
+                   "and redistribute it.\nThere is NO WARRANTY, to the extent "
+                   "permitted by law.",
+                   PROGRAM, ORGANIZATION, VERSION, YEAR, ORGANIZATION,
+                   LICENCE_LINE);
+          exit (0);
+        }
+    }
+  return -1;
+}