Match CreateItemDrop

asm/non_matching/CreateItemDrop.inc

@@ -1,149 +0,0 @@
-.syntax unified
-	push {r4, r5, r6, lr}
-	adds r6, r0, #0
-	adds r4, r1, #0
-	adds r5, r2, #0
-	cmp r4, #0x5e
-	beq _08054786
-	cmp r4, #0x5e
-	bhi _08054772
-	cmp r4, #0x5c
-	beq _080547A6
-	cmp r4, #0x5c
-	bhi _08054782
-	cmp r4, #0x3f
-	beq _08054794
-	b _080547DA
-_08054772:
-	cmp r4, #0xfc
-	blo _080547DA
-	cmp r4, #0xfe
-	bls _080547A6
-	cmp r4, #0xff
-	bne _080547DA
-	movs r0, #1
-	b _08054788
-_08054782:
-	movs r0, #0x65
-	b _08054788
-_08054786:
-	movs r0, #9
-_08054788:
-	bl GetInventoryValue
-	cmp r0, #0
-	bne _080547DA
-_08054790:
-	movs r0, #0
-	b _0805486C
-_08054794:
-	movs r0, #0x40
-	bl GetInventoryValue
-	cmp r0, #0
-	beq _08054790
-	cmp r5, #0
-	bne _080547DA
-	movs r5, #1
-	b _080547DA
-_080547A6:
-	movs r0, #0x67
-	bl GetInventoryValue
-	cmp r0, #0
-	beq _08054790
-	ldr r0, _080547FC @ =gRoomVars
-	ldrb r0, [r0, #5]
-	cmp r0, #3
-	bhi _08054790
-	cmp r4, #0x5c
-	beq _080547DA
-	adds r5, r4, #0
-	subs r5, #0xfc
-	bl Random
-	movs r1, #0x3f
-	ands r1, r0
-	ldr r2, _08054800 @ =gUnk_080FE1DD
-	lsls r0, r5, #6
-	adds r1, r1, r0
-	adds r1, r1, r2
-	ldrb r5, [r1]
-	movs r4, #0x5c
-	cmp r5, #0
-	bne _080547DA
-	movs r4, #0
-_080547DA:
-	cmp r4, #0
-	beq _0805486A
-	cmp r4, #0xff
-	beq _08054842
-	movs r0, #0
-	adds r1, r4, #0
-	adds r2, r5, #0
-	bl CreateObject
-	adds r2, r0, #0
-	cmp r2, #0
-	beq _0805486A
-	ldr r0, _08054804 @ =gPlayerEntity
-	cmp r6, r0
-	bne _08054808
-	movs r0, #1
-	b _0805480A
-	.align 2, 0
-_080547FC: .4byte gRoomVars
-_08054800: .4byte gUnk_080FE1DD
-_08054804: .4byte gPlayerEntity
-_08054808:
-	movs r0, #0
-_0805480A:
-	strb r0, [r2, #0xe]
-	ldrb r0, [r6, #8]
-	cmp r0, #6
-	bne _08054838
-	ldrb r0, [r6, #9]
-	cmp r0, #0x63
-	bne _0805481C
-	str r2, [r6, #0x54]
-	b _08054838
-_0805481C:
-	cmp r0, #0x1e
-	bne _08054838
-	ldrb r0, [r6, #0x14]
-	lsls r0, r0, #3
-	movs r3, #0x80
-	rsbs r3, r3, #0
-	adds r1, r3, #0
-	orrs r0, r1
-	strb r0, [r2, #0x15]
-	movs r0, #0xc0
-	strh r0, [r2, #0x24]
-	movs r0, #0xc0
-	lsls r0, r0, #9
-	str r0, [r2, #0x20]
-_08054838:
-	adds r0, r6, #0
-	adds r1, r2, #0
-	bl CopyPosition
-	b _0805486A
-_08054842:
-	movs r0, #7
-	movs r1, #0
-	bl CreateEnemy
-	adds r2, r0, #0
-	cmp r2, #0
-	beq _0805486A
-	ldrh r0, [r6, #0x2e]
-	strh r0, [r2, #0x2e]
-	ldrh r0, [r6, #0x32]
-	strh r0, [r2, #0x32]
-	adds r0, r6, #0
-	adds r0, #0x38
-	ldrb r1, [r0]
-	adds r0, r2, #0
-	adds r0, #0x38
-	strb r1, [r0]
-	adds r0, r2, #0
-	bl UpdateSpriteForCollisionLayer
-_0805486A:
-	adds r0, r4, #0
-_0805486C:
-	pop {r4, r5, r6, pc}
-	.align 2, 0
-.syntax divided

src/code_0805436C.c

@@ -6,6 +6,8 @@
 #include "common.h"
 #include "save.h"
 #include "item.h"
+#include "object.h"
+#include "enemy.h"
 
 typedef struct {
     u8 unk;
@@ -30,6 +32,8 @@ Returns the slot the item is equipped in.
 1: B
 2: Not equipped
 */
+extern u8 gUnk_080FE1DD[];
+
 u32 IsItemEquipped(u32 itemID) {
     u32 itemSlot;
 
@@ -173,10 +177,96 @@ ASM_FUNC("asm/non_matching/eu/sub_0805457C.inc", u32 sub_0805457C(u32 arg0, u32
 ASM_FUNC("asm/non_matching/sub_0805457C.inc", u32 sub_0805457C(u32 arg0, u32 arg1));
 #endif
 
-NONMATCH("asm/non_matching/CreateItemDrop.inc", u32 CreateItemDrop(Entity* arg0, u32 itemID, u32 itemParameter)) {
-    // TODO see below
+u32 CreateItemDrop(Entity* arg0, u32 itemID, u32 itemParameter) {
+    u32 prereqID;
+    u32 adjustedParam = itemParameter;
+    u32 uVar1;
+    Entity* itemEntity;
+
+    switch (itemID) {
+        case 0xff:
+            if (!GetInventoryValue(0x1)) {
+                return 0;
+            }
+            break;
+        case 0x5d:
+            if (!GetInventoryValue(0x65)) {
+                return 0;
+            }
+            break;
+        case 0x5e:
+            if (!GetInventoryValue(0x9)) {
+                return 0;
+            }
+            break;
+        case 0x3f: {
+            if (!GetInventoryValue(0x40)) {
+                return 0;
+            }
+            if (itemParameter == 0) {
+                adjustedParam = 1;
+            }
+            break;
+        }
+        case 0x5c:
+        case 0xfc ... 0xfe: {
+            u32 tmp, tmp2;
+            u32 rand;
+            u8* ptr;
+
+            if (GetInventoryValue(0x67) == 0) {
+                return 0;
+            }
+            if (3 < gRoomVars.filler1[0]) {
+                return 0;
+            }
+
+            if (itemID != 0x5c) {
+                adjustedParam = itemID - 0xfc;
+                rand = (Random() & 0x3f);
+                ptr = gUnk_080FE1DD;
+                adjustedParam = gUnk_080FE1DD[(rand + adjustedParam * 0x40)];
+                if (adjustedParam == 0) {
+                    itemID = 0;
+                } else {
+                    itemID = 0x5c;
+                }
+            }
+            break;
+        }
+    }
+    if (itemID != 0) {
+        if (itemID != 0xff) {
+            itemEntity = CreateObject(GROUND_ITEM, itemID, adjustedParam);
+            if (itemEntity != NULL) {
+                if (arg0 == &gPlayerEntity) {
+                    itemEntity->actionDelay = 1;
+                } else {
+                    itemEntity->actionDelay = 0;
+                }
+                if (arg0->kind == 6) {
+                    if (arg0->id == 99) {
+                        arg0->child = itemEntity;
+                    } else if (arg0->id == 0x1e) {
+                        itemEntity->direction = arg0->animationState << 3 | 0x80;
+                        itemEntity->speed = 0xc0;
+                        itemEntity->zVelocity = 0x18000;
+                    }
+                }
+                CopyPosition(arg0, itemEntity);
+            }
+        } else {
+            itemEntity = CreateEnemy(BEETLE, 0);
+            if (itemEntity != NULL) {
+                itemEntity->x.HALF.HI = arg0->x.HALF.HI;
+                itemEntity->y.HALF.HI = arg0->y.HALF.HI;
+                itemEntity->collisionLayer = arg0->collisionLayer;
+                UpdateSpriteForCollisionLayer(itemEntity);
+            }
+        }
+    }
+    return itemID;
 }
-END_NONMATCH
 /*
 extern u8 gUnk_080FE1DD[];