Update mdlib.c

src/NetHack_3.7/src/mdlib.c

@@ -163,10 +163,10 @@ static struct win_information window_opts[] = {
 static int count_and_validate_soundlibopts(void);
 
 struct soundlib_information {
-    enum soundlib_ids id;
-    const char *const text_id;
-    const char *const Url;
-    boolean valid;
+    enum soundlib_ids id; // The ID of the sound library
+    const char *const text_id; // The ID of the text associated with the sound library
+    const char *const Url; // A URL to the sound library's homepage or download link
+    boolean valid; // Whether or not the sound library is valid (i.e., exists and is properly configured)
 };
 
 /*
@@ -959,14 +959,14 @@ case_insensitive_comp(const char *s1, const char *s2)
 void
 runtime_info_init(void)
 {
-    if (!done_runtime_opt_init_once) {
-        done_runtime_opt_init_once = 1;
-        build_savebones_compat_string();
+    if (!done_runtime_opt_init_once) { // Check if runtime info has already been initialized
+        done_runtime_opt_init_once = 1; // Mark that runtime info has been initialized
+        build_savebones_compat_string(); // Build a string for save file compatibility
         /* construct the current version number */
-        make_version();
+        make_version();// Constructs the version number of the game
         populate_nomakedefs(&version);          /* date.c */
-        idxopttext = 0;
-        build_options();
+        idxopttext = 0;// Set the index of option text to 0
+        build_options(); // Construct the game options
     }
 }