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-rwxr-xr-xengine/items.asm551
1 files changed, 551 insertions, 0 deletions
diff --git a/engine/items.asm b/engine/items.asm
new file mode 100755
index 00000000..387f4ba2
--- /dev/null
+++ b/engine/items.asm
@@ -0,0 +1,551 @@
+ReceiveItem_:: ; d1e2 (3:51e2)
+ call CheckBagOrPC
+ jp nz, PutItemInPocketOrPC
+ push hl
+ call CheckItemPocket
+ pop de
+ ld a, [wd03f]
+ dec a
+ ld hl, .Jumptable
+ rst JumpTable
+ ret
+
+.Jumptable
+ dw ReceiveNormalItem
+ dw ReceiveKeyItem
+ dw ReceiveBall
+ dw ReceiveTMHM
+
+ReceiveNormalItem:
+ ld h, d
+ ld l, e
+ jp PutItemInPocketOrPC
+
+ReceiveKeyItem:
+ ld h, d
+ ld l, e
+ jp PutItemInKeyItemPocket
+
+ReceiveBall:
+ ld hl, wNumBalls
+ jp PutItemInPocketOrPC
+
+ReceiveTMHM:
+ ld h, d
+ ld l, e
+ ld a, [wd002]
+ ld c, a
+ call GetTMHMNumber
+ jp PutItemInTMPocket
+
+TossItem_:: ; d21a (3:521a)
+ call CheckBagOrPC
+ jr nz, remove_item_from_bag_or_pc
+ push hl
+ call CheckItemPocket
+ pop de
+ ld a, [wd03f]
+ dec a
+ ld hl, .Jumptable ; $522d
+ rst JumpTable
+ ret
+
+.Jumptable
+ dw RemoveNormalItem
+ dw RemoveKeyItem
+ dw RemoveBall
+ dw RemoveTMHM
+
+RemoveBall:
+ ld hl, wNumBalls
+ jp RemoveItemAndQuantity
+
+RemoveTMHM:
+ ld h, d
+ ld l, e
+ ld a, [wd002]
+ ld c, a
+ call GetTMHMNumber
+ jp RemoveTMorHM
+
+RemoveKeyItem:
+ ld h, d
+ ld l, e
+ jp RemoveItemWithoutQuantity
+
+RemoveNormalItem:
+ ld h, d
+ ld l, e
+remove_item_from_bag_or_pc
+ jp RemoveItemAndQuantity
+
+CheckItem_:: ; d251 (3:5251)
+ call CheckBagOrPC
+ jr nz, check_item_in_bag_or_pc
+ push hl
+ call CheckItemPocket
+ pop de
+ ld a, [wd03f]
+ dec a
+ ld hl, .Jumptable
+ rst JumpTable
+ ret
+
+.Jumptable
+ dw CheckNormalItem
+ dw CheckKeyItem
+ dw CheckBall
+ dw CheckTMHM
+
+CheckBall:
+ ld hl, wNumBalls
+ jp CheckItemWithQuantity
+
+CheckTMHM:
+ ld h, d
+ ld l, e
+ ld a, [wd002]
+ ld c, a
+ call GetTMHMNumber
+ jp CheckTMorHM
+
+CheckKeyItem:
+ ld h, d
+ ld l, e
+ jp CheckItemWithoutQuantity
+
+CheckNormalItem:
+ ld h, d
+ ld l, e
+check_item_in_bag_or_pc
+ jp CheckItemWithQuantity
+
+CheckBagOrPC: ; d288 (3:5288)
+ ld a, l
+ cp wNumItems % $100
+ ret nz
+ ld a, h
+ cp wNumItems / $100
+ ret
+
+GetPocketCapacity: ; d290 (3:5290)
+ ld c, MAX_ITEMS
+ ld a, e
+ cp wNumItems % $100
+ jr nz, .asm_d29b
+ ld a, d
+ cp wNumItems / $100
+ ret z
+.asm_d29b
+ ld c, MAX_PC_ITEMS
+ ld a, e
+ cp wPCItems % $100
+ jr nz, .asm_d2a6
+ ld a, d
+ cp wPCItems / $100
+ ret z
+.asm_d2a6
+ ld c, MAX_BALLS
+ ret
+
+PutItemInPocketOrPC: ; d2a9 (3:52a9)
+ ld d, h
+ ld e, l
+ inc hl
+ ld a, [wd002]
+ ld c, a
+ ld b, $0
+.asm_d2b2
+ ld a, [hli]
+ cp $ff
+ jr z, .asm_d2ca
+ cp c
+ jr nz, .asm_d2c7
+ ld a, $63
+ sub [hl]
+ add b
+ ld b, a
+ ld a, [wd009]
+ cp b
+ jr z, .asm_d2d3
+ jr c, .asm_d2d3
+.asm_d2c7
+ inc hl
+ jr .asm_d2b2
+
+.asm_d2ca
+ call GetPocketCapacity
+ ld a, [de]
+ cp c
+ jr c, .asm_d2d3
+ and a
+ ret
+
+.asm_d2d3
+ ld h, d
+ ld l, e
+ ld a, [wd002]
+ ld c, a
+ ld a, [wd009]
+ ld [wd00a], a
+.asm_d2df
+ inc hl
+ ld a, [hli]
+ cp $ff
+ jr z, .asm_d2fc
+ cp c
+ jr nz, .asm_d2df
+ ld a, [wd00a]
+ add [hl]
+ cp $64
+ jr nc, .asm_d2f3
+ ld [hl], a
+ jr .asm_d30a
+
+.asm_d2f3
+ ld [hl], $63
+ sub $63
+ ld [wd00a], a
+ jr .asm_d2df
+
+.asm_d2fc
+ dec hl
+ ld a, [wd002]
+ ld [hli], a
+ ld a, [wd00a]
+ ld [hli], a
+ ld [hl], $ff
+ ld h, d
+ ld l, e
+ inc [hl]
+.asm_d30a
+ scf
+ ret
+
+RemoveItemAndQuantity: ; d30c (3:530c)
+ ld d, h
+ ld e, l
+ ld a, [hli]
+ ld c, a
+ ld a, [wd003]
+ cp c
+ jr nc, .asm_d325
+ ld c, a
+ ld b, $0
+ add hl, bc
+ add hl, bc
+ ld a, [wd002]
+ cp [hl]
+ inc hl
+ jr z, .asm_d334
+ ld h, d
+ ld l, e
+ inc hl
+.asm_d325
+ ld a, [wd002]
+ ld b, a
+.asm_d329
+ ld a, [hli]
+ cp b
+ jr z, .asm_d334
+ cp $ff
+ jr z, .asm_d354
+ inc hl
+ jr .asm_d329
+
+.asm_d334
+ ld a, [wd009]
+ ld b, a
+ ld a, [hl]
+ sub b
+ jr c, .asm_d354
+ ld [hl], a
+ ld [wd00a], a
+ and a
+ jr nz, .asm_d352
+ dec hl
+ ld b, h
+ ld c, l
+ inc hl
+ inc hl
+.asm_d348
+ ld a, [hli]
+ ld [bc], a
+ inc bc
+ cp $ff
+ jr nz, .asm_d348
+ ld h, d
+ ld l, e
+ dec [hl]
+.asm_d352
+ scf
+ ret
+
+.asm_d354
+ and a
+ ret
+
+CheckItemWithQuantity: ; d356 (3:5356)
+ ld a, [wd002]
+ ld c, a
+.asm_d35a
+ inc hl
+ ld a, [hli]
+ cp $ff
+ jr z, .asm_d365
+ cp c
+ jr nz, .asm_d35a
+ scf
+ ret
+
+.asm_d365
+ and a
+ ret
+
+PutItemInKeyItemPocket: ; d367 (3:5367)
+ ld hl, wItemsEnd
+ ld a, [hli]
+ cp $19
+ jr nc, .asm_d37f
+ ld c, a
+ ld b, $0
+ add hl, bc
+ ld a, [wd002]
+ ld [hli], a
+ ld [hl], $ff
+ ld hl, wNumKeyItems
+ inc [hl]
+ scf
+ ret
+
+.asm_d37f
+ and a
+ ret
+
+RemoveItemWithoutQuantity: ; d381 (3:5381)
+ ld a, [wd003]
+ ld e, a
+ ld d, $0
+ ld hl, wItemsEnd
+ ld a, [hl]
+ cp e
+ jr nc, .asm_d394
+ call FindAndTossKeyItem
+ ret nc
+ jr .asm_d397
+
+.asm_d394
+ dec [hl]
+ inc hl
+ add hl, de
+.asm_d397
+ ld d, h
+ ld e, l
+ inc hl
+.asm_d39a
+ ld a, [hli]
+ ld [de], a
+ inc de
+ cp $ff
+ jr nz, .asm_d39a
+ scf
+ ret
+
+FindAndTossKeyItem: ; d3a3 (3:53a3)
+ ld hl, wItemsEnd
+ ld a, [wd002]
+ ld c, a
+.asm_d3aa
+ inc hl
+ ld a, [hl]
+ cp c
+ jr z, .asm_d3b5
+ cp $ff
+ jr nz, .asm_d3aa
+ xor a
+ ret
+
+.asm_d3b5
+ ld a, [wNumKeyItems]
+ dec a
+ ld [wNumKeyItems], a
+ scf
+ ret
+
+CheckItemWithoutQuantity: ; d3be (3:53be)
+ ld a, [wd002]
+ ld c, a
+ ld hl, wKeyItems
+.asm_d3c5
+ ld a, [hli]
+ cp c
+ jr z, .asm_d3cf
+ cp $ff
+ jr nz, .asm_d3c5
+ and a
+ ret
+
+.asm_d3cf
+ scf
+ ret
+
+PutItemInTMPocket: ; d3d1 (3:53d1)
+ dec c
+ ld b, $0
+ ld hl, wTMsHMs
+ add hl, bc
+ ld a, [wd009]
+ add [hl]
+ cp $64
+ jr nc, .asm_d3e3
+ ld [hl], a
+ scf
+ ret
+
+.asm_d3e3
+ and a
+ ret
+
+RemoveTMorHM: ; d3e5 (3:53e5)
+ dec c
+ ld b, $0
+ ld hl, wTMsHMs
+ add hl, bc
+ ld a, [wd009]
+ ld b, a
+ ld a, [hl]
+ sub b
+ jr c, .asm_d406
+ ld [hl], a
+ ld [wd00a], a
+ jr nz, .asm_d404
+ ld a, [wcfd2]
+ and a
+ jr z, .asm_d404
+ dec a
+ ld [wcfd2], a
+.asm_d404
+ scf
+ ret
+
+.asm_d406
+ and a
+ ret
+
+CheckTMorHM: ; d408 (3:5408)
+ dec c
+ ld b, $0
+ ld hl, wTMsHMs
+ add hl, bc
+ ld a, [hl]
+ and a
+ ret z
+ scf
+ ret
+
+GetTMHMNumber:: ; d414 (3:5414)
+ ld a, c
+ cp ITEM_C3
+ jr c, .asm_d41f
+ cp ITEM_DC
+ jr c, .asm_d41e
+ dec a
+.asm_d41e
+ dec a
+.asm_d41f
+ sub $bf
+ inc a
+ ld c, a
+ ret
+
+GetNumberedTM:
+ ld a, c
+ cp ITEM_C3 - (TM01 - 1)
+ jr c, .asm_d42f
+ cp ITEM_DC - (TM01 - 1) - 1
+ jr c, .asm_d42e
+ inc a
+.asm_d42e
+ inc a
+.asm_d42f
+ add TM01
+ dec a
+ ld c, a
+ ret
+
+CheckTossableItem_:: ; d434 (3:5434)
+ ld a, $4
+ call GetItemAttr
+ bit 7, a
+ jr nz, ItemAttr_ReturnCarry
+ and a
+ ret
+
+CheckSelectableItem:
+ ld a, $4
+ call GetItemAttr
+ bit 6, a
+ jr nz, ItemAttr_ReturnCarry
+ and a
+ ret
+
+CheckItemPocket: ; d44a (3:544a)
+ ld a, $5
+ call GetItemAttr
+ and $f
+ ld [wd03f], a
+ ret
+
+CheckItemContext:
+ ld a, $6
+ call GetItemAttr
+ and $f
+ ld [wd03f], a
+ ret
+
+CheckItemMenu:
+ ld a, $6
+ call GetItemAttr
+ swap a
+ and $f
+ ld [wd03f], a
+ ret
+
+GetItemAttr: ; d46d (3:546d)
+ push hl
+ push bc
+ ld hl, ItemAttributes
+ ld c, a
+ ld b, $0
+ add hl, bc
+ xor a
+ ld [wd03f], a
+ ld a, [wd002]
+ dec a
+ ld c, a
+ ld a, $7
+ call AddNTimes
+ ld a, BANK(ItemAttributes)
+ call GetFarByte
+ pop bc
+ pop hl
+ ret
+
+ItemAttr_ReturnCarry
+ ld a, $1
+ ld [wd03f], a
+ scf
+ ret
+
+GetItemPrice:
+ push hl
+ push bc
+ ld a, $0
+ call GetItemAttr
+ ld e, a
+ ld a, $1
+ call GetItemAttr
+ ld d, a
+ pop bc
+ pop hl
+ ret
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