ref: 08891da82254aa4051bf594d4abc2db8e4043d8f
dir: /engine/items.asm/
_ReceiveItem:: ; d1d5 call DoesHLEqualNumItems jp nz, PutItemInPocket push hl call CheckItemPocket pop de ld a, [wItemAttributeParamBuffer] dec a ld hl, .Pockets rst JumpTable ret .Pockets: ; d1e9 ; entries correspond to item types dw .Item dw .KeyItem dw .Ball dw .TMHM .Item: ; d1f1 ld h, d ld l, e jp PutItemInPocket .KeyItem: ; d1f6 ld h, d ld l, e jp ReceiveKeyItem .Ball: ; d1fb ld hl, NumBalls jp PutItemInPocket .TMHM: ; d201 ld h, d ld l, e ld a, [CurItem] ld c, a call GetTMHMNumber jp ReceiveTMHM _TossItem:: ; d20d call DoesHLEqualNumItems jr nz, .remove push hl call CheckItemPocket pop de ld a, [wItemAttributeParamBuffer] dec a ld hl, .Pockets rst JumpTable ret .Pockets: ; entries correspond to item types dw .Item dw .KeyItem dw .Ball dw .TMHM .Ball: ; d228 ld hl, NumBalls jp RemoveItemFromPocket .TMHM: ; d22e ld h, d ld l, e ld a, [CurItem] ld c, a call GetTMHMNumber jp TossTMHM .KeyItem: ; d23a ld h, d ld l, e jp TossKeyItem .Item: ; d23f ld h, d ld l, e .remove jp RemoveItemFromPocket _CheckItem:: ; d244 call DoesHLEqualNumItems jr nz, .nope push hl call CheckItemPocket pop de ld a, [wItemAttributeParamBuffer] dec a ld hl, .Pockets rst JumpTable ret .Pockets: ; entries correspond to item types dw .Item dw .KeyItem dw .Ball dw .TMHM .Ball: ; d25f ld hl, NumBalls jp CheckTheItem .TMHM: ; d265 ld h, d ld l, e ld a, [CurItem] ld c, a call GetTMHMNumber jp CheckTMHM .KeyItem: ; d271 ld h, d ld l, e jp CheckKeyItems .Item: ; d276 ld h, d ld l, e .nope jp CheckTheItem DoesHLEqualNumItems: ; d27b ld a, l cp LOW(NumItems) ret nz ld a, h cp HIGH(NumItems) ret GetPocketCapacity: ; d283 ld c, MAX_ITEMS ld a, e cp LOW(NumItems) jr nz, .not_bag ld a, d cp HIGH(NumItems) ret z .not_bag ld c, MAX_PC_ITEMS ld a, e cp LOW(PCItems) jr nz, .not_pc ld a, d cp HIGH(PCItems) ret z .not_pc ld c, MAX_BALLS ret PutItemInPocket: ; d29c ld d, h ld e, l inc hl ld a, [CurItem] ld c, a ld b, 0 .loop ld a, [hli] cp -1 jr z, .terminator cp c jr nz, .next ld a, 99 sub [hl] add b ld b, a ld a, [wItemQuantityChangeBuffer] cp b jr z, .ok jr c, .ok .next inc hl jr .loop .terminator call GetPocketCapacity ld a, [de] cp c jr c, .ok and a ret .ok ld h, d ld l, e ld a, [CurItem] ld c, a ld a, [wItemQuantityChangeBuffer] ld [wItemQuantityBuffer], a .loop2 inc hl ld a, [hli] cp -1 jr z, .terminator2 cp c jr nz, .loop2 ld a, [wItemQuantityBuffer] add [hl] cp 100 jr nc, .newstack ld [hl], a jr .done .newstack ld [hl], 99 sub 99 ld [wItemQuantityBuffer], a jr .loop2 .terminator2 dec hl ld a, [CurItem] ld [hli], a ld a, [wItemQuantityBuffer] ld [hli], a ld [hl], -1 ld h, d ld l, e inc [hl] .done scf ret RemoveItemFromPocket: ; d2ff ld d, h ld e, l ld a, [hli] ld c, a ld a, [CurItemQuantity] cp c jr nc, .ok ; memory ld c, a ld b, $0 add hl, bc add hl, bc ld a, [CurItem] cp [hl] inc hl jr z, .skip ld h, d ld l, e inc hl .ok ld a, [CurItem] ld b, a .loop ld a, [hli] cp b jr z, .skip cp -1 jr z, .nope inc hl jr .loop .skip ld a, [wItemQuantityChangeBuffer] ld b, a ld a, [hl] sub b jr c, .nope ld [hl], a ld [wItemQuantityBuffer], a and a jr nz, .yup dec hl ld b, h ld c, l inc hl inc hl .loop2 ld a, [hli] ld [bc], a inc bc cp -1 jr nz, .loop2 ld h, d ld l, e dec [hl] .yup scf ret .nope and a ret CheckTheItem: ; d349 ld a, [CurItem] ld c, a .loop inc hl ld a, [hli] cp -1 jr z, .done cp c jr nz, .loop scf ret .done and a ret ReceiveKeyItem: ; d35a ld hl, NumKeyItems ld a, [hli] cp MAX_KEY_ITEMS jr nc, .nope ld c, a ld b, 0 add hl, bc ld a, [CurItem] ld [hli], a ld [hl], -1 ld hl, NumKeyItems inc [hl] scf ret .nope and a ret TossKeyItem: ; d374 ld a, [CurItemQuantity] ld e, a ld d, 0 ld hl, NumKeyItems ld a, [hl] cp e jr nc, .ok call .Toss ret nc jr .ok2 .ok dec [hl] inc hl add hl, de .ok2 ld d, h ld e, l inc hl .loop ld a, [hli] ld [de], a inc de cp -1 jr nz, .loop scf ret .Toss: ; d396 ld hl, NumKeyItems ld a, [CurItem] ld c, a .loop3 inc hl ld a, [hl] cp c jr z, .ok3 cp -1 jr nz, .loop3 xor a ret .ok3 ld a, [NumKeyItems] dec a ld [NumKeyItems], a scf ret CheckKeyItems: ; d3b1 ld a, [CurItem] ld c, a ld hl, KeyItems .loop ld a, [hli] cp c jr z, .done cp -1 jr nz, .loop and a ret .done scf ret ReceiveTMHM: ; d3c4 dec c ld b, 0 ld hl, TMsHMs add hl, bc ld a, [wItemQuantityChangeBuffer] add [hl] cp 100 jr nc, .toomany ld [hl], a scf ret .toomany and a ret TossTMHM: ; d3d8 dec c ld b, 0 ld hl, TMsHMs add hl, bc ld a, [wItemQuantityChangeBuffer] ld b, a ld a, [hl] sub b jr c, .nope ld [hl], a ld [wItemQuantityBuffer], a jr nz, .yup ld a, [wTMHMPocketScrollPosition] and a jr z, .yup dec a ld [wTMHMPocketScrollPosition], a .yup scf ret .nope and a ret CheckTMHM: ; d3fb dec c ld b, $0 ld hl, TMsHMs add hl, bc ld a, [hl] and a ret z scf ret GetTMHMNumber:: ; d407 ; Return the number of a TM/HM by item id c. ld a, c ; Skip any dummy items. cp ITEM_C3 ; TM04-05 jr c, .done cp ITEM_DC ; TM28-29 jr c, .skip dec a .skip dec a .done sub TM01 inc a ld c, a ret GetNumberedTMHM: ; d417 ; Return the item id of a TM/HM by number c. ld a, c ; Skip any gaps. cp ITEM_C3 - (TM01 - 1) jr c, .done cp ITEM_DC - (TM01 - 1) - 1 jr c, .skip_one .skip_two inc a .skip_one inc a .done add TM01 dec a ld c, a ret _CheckTossableItem:: ; d427 ; Return 1 in wItemAttributeParamBuffer and carry if CurItem can't be removed from the bag. ld a, ITEMATTR_PERMISSIONS call GetItemAttr bit CANT_TOSS_F, a jr nz, ItemAttr_ReturnCarry and a ret CheckSelectableItem: ; d432 ; Return 1 in wItemAttributeParamBuffer and carry if CurItem can't be selected. ld a, ITEMATTR_PERMISSIONS call GetItemAttr bit CANT_SELECT_F, a jr nz, ItemAttr_ReturnCarry and a ret CheckItemPocket:: ; d43d ; Return the pocket for CurItem in wItemAttributeParamBuffer. ld a, ITEMATTR_POCKET call GetItemAttr and $f ld [wItemAttributeParamBuffer], a ret CheckItemContext: ; d448 ; Return the context for CurItem in wItemAttributeParamBuffer. ld a, ITEMATTR_HELP call GetItemAttr and $f ld [wItemAttributeParamBuffer], a ret CheckItemMenu: ; d453 ; Return the menu for CurItem in wItemAttributeParamBuffer. ld a, ITEMATTR_HELP call GetItemAttr swap a and $f ld [wItemAttributeParamBuffer], a ret GetItemAttr: ; d460 ; Get attribute a of CurItem. push hl push bc ld hl, ItemAttributes ld c, a ld b, 0 add hl, bc xor a ld [wItemAttributeParamBuffer], a ld a, [CurItem] dec a ld c, a ld a, ITEMATTR_STRUCT_LENGTH call AddNTimes ld a, BANK(ItemAttributes) call GetFarByte pop bc pop hl ret ItemAttr_ReturnCarry: ; d47f ld a, 1 ld [wItemAttributeParamBuffer], a scf ret GetItemPrice: ; d486 ; Return the price of CurItem in de. push hl push bc ld a, ITEMATTR_PRICE call GetItemAttr ld e, a ld a, ITEMATTR_PRICE_HI call GetItemAttr ld d, a pop bc pop hl ret