void *mh_xcalloc(size_t, size_t);
void mh_free0(void *);
char *pwd(void);
-char *add(char *, char *);
+char *add(const char *, char *);
void create_folder(char *, int, void (*)(int));
int num_digits(int);
char *mh_xstrdup(char *);
};
void app_msgarg(struct msgs_array *, char *);
+int parse_msgs(const struct msgs_array *, char *, struct msgs_array *);