Minor AMS and hash access optimization

asset/AssetManagementSystem.h

@@ -194,6 +194,20 @@ Asset* ams_get_asset(AssetManagementSystem* ams, const char* key)
     return entry ? (Asset *) entry->value : NULL;
 }
 
+inline
+Asset* ams_get_asset(AssetManagementSystem* ams, const char* key, uint64 index)
+{
+    HashEntry* entry = hashmap_get_entry(&ams->hash_map, key, index);
+
+    // @bug entry->value seems to be an address outside of any known buffer, how?
+    DEBUG_MEMORY_READ(
+        (uint64) (entry ? (Asset *) entry->value : 0),
+        entry ? ((Asset *) entry->value)->ram_size + sizeof(Asset) : 0
+    );
+
+    return entry ? (Asset *) entry->value : NULL;
+}
+
 // @todo implement defragment command to optimize memory layout since the memory layout will become fragmented over time
 
 Asset* ams_reserve_asset(AssetManagementSystem* ams, const char* name, uint32 elements = 1)

hash/GeneralHash.h

@@ -11,6 +11,7 @@
 
 #include "../stdlib/Types.h"
 
+inline constexpr
 uint64 hash_djb2(const char* key) {
     uint64 hash = 5381;
     int32 c;

stdlib/HashMap.h

@@ -359,6 +359,10 @@ HashEntry* hashmap_get_entry(HashMap* hm, const char* key) {
 // This function only saves one step (omission of the hash function)
 // The reason for this is in some cases we can use compile time hashing
 HashEntry* hashmap_get_entry(HashMap* hm, const char* key, uint64 index) {
+    if (hm->buf.count == 0) {
+        return NULL;
+    }
+
     index %= hm->buf.count;
     HashEntry* entry = (HashEntry *) hm->table[index];
 

ui/UILayout.h

@@ -4,6 +4,7 @@
 #include "../stdlib/Types.h"
 #include "../stdlib/HashMap.h"
 #include "UIElement.h"
+#include "../asset/Asset.h"
 
 // Modified for every scene
 struct UILayout {
@@ -25,8 +26,7 @@ struct UILayout {
     HashMap hash_map;
 
     int32 vertex_size;
-    int32 vertex_pos;
-    Vertex3DTextureColorIndex* vertices;
+    Asset* ui_asset;
 };
 
 inline