1 files changed, 88 insertions, 0 deletions
diff --git a/src/move_util.c b/src/move_util.c
new file mode 100644
index 0000000..4487862
--- /dev/null
+++ b/src/move_util.c
@@ -0,0 +1,88 @@
+#include "global.h"
+#include "move_util.h"
+
+#include "constants/move_id.h"
+#include "constants/status.h"
+#include "moves.h"
+
+bool8 IsMoveIndexUsable(struct DungeonEntity *pokemon, s32 moveIndex, bool8 hasPPChecker)
+{
+    struct DungeonEntityData *pokemonData = pokemon->entityData;
+    struct PokemonMove *move = &pokemonData->moves[moveIndex];
+    s32 i;
+    if (!(move->moveFlags & MOVE_FLAG_EXISTS))
+    {
+        return FALSE;
+    }
+    if (move->moveFlags & MOVE_FLAG_LINKED)
+    {
+        return FALSE;
+    }
+    if (move->moveFlags & MOVE_FLAG_DISABLED ||
+        move->moveFlags2 & MOVE_FLAG_SEALED)
+    {
+        return FALSE;
+    }
+    goto initMoveIndex;
+    returnTrue:
+    return TRUE;
+    initMoveIndex:
+    i = 0;
+    goto checkMoveUsable;
+    incMoveIndex:
+    i++;
+    checkMoveUsable:
+    if (i >= MAX_MON_MOVES)
+    {
+        return FALSE;
+    }
+    if (IsMoveUsable(pokemon, move, hasPPChecker))
+    {
+        goto returnTrue;
+    }
+    move++;
+    if ((u32) move >= (u32) &pokemonData->struggleMoveFlags || !(move->moveFlags & MOVE_FLAG_LINKED))
+    {
+        return FALSE;
+    }
+    goto incMoveIndex;
+}
+
+bool8 IsMoveUsable(struct DungeonEntity *pokemon, struct PokemonMove *move, bool8 hasPPChecker)
+{
+    struct DungeonEntityData *pokemonData = pokemon->entityData;
+    if (move->moveID == MOVE_REGULAR_ATTACK)
+    {
+        return TRUE;
+    }
+    if (move->moveFlags & MOVE_FLAG_DISABLED || move->moveFlags2 & MOVE_FLAG_SEALED)
+    {
+        return FALSE;
+    }
+    if (hasPPChecker)
+    {
+        if (move->PP == 0)
+        {
+            return FALSE;
+        }
+        if (pokemonData->volatileStatus == VOLATILE_STATUS_TAUNTED && !MoveDealsDirectDamage(move))
+        {
+            return FALSE;
+        }
+        if (pokemonData->volatileStatus == VOLATILE_STATUS_ENCORE)
+        {
+            if (move->moveID == MOVE_STRUGGLE)
+            {
+                if (!(pokemonData->struggleMoveFlags & MOVE_FLAG_LAST_USED))
+                {
+                    return FALSE;
+                }
+            }
+            else if (!(move->moveFlags & MOVE_FLAG_LAST_USED))
+            {
+                return FALSE;
+            }
+        }
+    }
+    return TRUE;
+}