--- a/dowa/dowa.h	Tue Dec 16 21:01:45 2025 -0500
+++ b/dowa/dowa.h	Sat Dec 20 13:56:01 2025 -0500
@@ -6,6 +6,7 @@
 #include <stdlib.h> // only for malloc, free, stuff
 #include <assert.h> // mostly for TODO
 #include <dirent.h> // some functions loop through files
+#include <math.h> // I am not re-writing stuff I guess...
 
 #include <sys/stat.h>
 #include <limits.h>
@@ -54,6 +55,12 @@
 extern void  Dowa_Arena_Destroy(Dowa_PArena arena);
 /* Strdup but saves within the arena */
 extern void *Dowa_Arena_Copy(Dowa_PArena p_arena, const void *src, size_t size);
+/* Resets the arena offset to 0, allowing reuse without freeing */
+extern void  Dowa_Arena_Reset(Dowa_PArena p_arena);
+/* Returns the current number of bytes allocated in the arena */
+extern size_t Dowa_Arena_Get_Used(Dowa_PArena p_arena);
+/* Returns the remaining capacity in bytes */
+extern size_t Dowa_Arena_Get_Remaining(Dowa_PArena p_arena);
 
 
 // --- HashMap --- //
@@ -64,7 +71,7 @@
   DOWA_HASH_MAP_TYPE_INT       // Integer value
 } Dowa_HashMap_ValueType;
 
-typedef struct {
+typedef struct Dowa_HashEntry {
   char                  *key;
   void                  *buffer;
   size_t                 capacity;
@@ -97,6 +104,12 @@
 extern int32         Dowa_HashMap_Push_Value_With_Type_NoCopy(Dowa_PHashMap p_hash_map, const char *key, void *value, size_t value_size, Dowa_HashMap_ValueType type);
 /* Removes the entry with the specified key from the hashmap and frees its data if owned. */
 extern void          Dowa_HashMap_Pop_Key(Dowa_PHashMap p_hash_map, const char *key);
+/* Returns TRUE if the key exists in the hashmap, FALSE otherwise. */
+extern boolean       Dowa_HashMap_Has_Key(Dowa_PHashMap p_hash_map, const char *key);
+/* Removes all entries from the hashmap without destroying it. */
+extern void          Dowa_HashMap_Clear(Dowa_PHashMap p_hash_map);
+/* Returns the number of entries currently in the hashmap. */
+extern uint32        Dowa_HashMap_Get_Count(Dowa_PHashMap p_hash_map);
 
 // --- Utility Functions --- //
 /* Prints all entries in the hashmap to stdout for debugging purposes. */