ref: 13c4a93ceae759f1fd5f46b326afb83e4f44aeee
dir: /engine/items/switch_items.asm/
SwitchItemsInBag: ld a, [wSwitchItem] and a jr z, .init ld b, a ld a, [wScrollingMenuCursorPosition] inc a cp b jr z, .trivial ld a, [wScrollingMenuCursorPosition] call ItemSwitch_GetNthItem ld a, [hl] cp -1 ret z ld a, [wSwitchItem] dec a ld [wSwitchItem], a call Function249a7 jp c, Function249d1 ld a, [wScrollingMenuCursorPosition] ld c, a ld a, [wSwitchItem] cp c jr c, .asm_2497a jr .asm_2494a .init ld a, [wScrollingMenuCursorPosition] inc a ld [wSwitchItem], a ret .trivial xor a ld [wSwitchItem], a ret .asm_2494a ld a, [wSwitchItem] call Function24a40 ld a, [wScrollingMenuCursorPosition] ld d, a ld a, [wSwitchItem] ld e, a call Function24a6c push bc ld a, [wSwitchItem] call ItemSwitch_GetNthItem dec hl push hl call ItemSwitch_ConvertItemFormatToDW add hl, bc ld d, h ld e, l pop hl pop bc call Function24aab ld a, [wScrollingMenuCursorPosition] call Function24a4d xor a ld [wSwitchItem], a ret .asm_2497a ld a, [wSwitchItem] call Function24a40 ld a, [wScrollingMenuCursorPosition] ld d, a ld a, [wSwitchItem] ld e, a call Function24a6c push bc ld a, [wSwitchItem] call ItemSwitch_GetNthItem ld d, h ld e, l call ItemSwitch_ConvertItemFormatToDW add hl, bc pop bc call CopyBytes ld a, [wScrollingMenuCursorPosition] call Function24a4d xor a ld [wSwitchItem], a ret Function249a7: ld a, [wSwitchItem] call ItemSwitch_GetNthItem ld d, h ld e, l ld a, [wScrollingMenuCursorPosition] call ItemSwitch_GetNthItem ld a, [de] cp [hl] jr nz, .asm_249cd ld a, [wScrollingMenuCursorPosition] call Function24a97 cp MAX_ITEM_STACK jr z, .asm_249cd ld a, [wSwitchItem] call Function24a97 cp MAX_ITEM_STACK jr nz, .asm_249cf .asm_249cd and a ret .asm_249cf scf ret Function249d1: ld a, [wSwitchItem] call ItemSwitch_GetNthItem inc hl push hl ld a, [wScrollingMenuCursorPosition] call ItemSwitch_GetNthItem inc hl ld a, [hl] pop hl add [hl] cp MAX_ITEM_STACK + 1 jr c, .asm_24a01 sub MAX_ITEM_STACK push af ld a, [wScrollingMenuCursorPosition] call ItemSwitch_GetNthItem inc hl ld [hl], MAX_ITEM_STACK ld a, [wSwitchItem] call ItemSwitch_GetNthItem inc hl pop af ld [hl], a xor a ld [wSwitchItem], a ret .asm_24a01 push af ld a, [wScrollingMenuCursorPosition] call ItemSwitch_GetNthItem inc hl pop af ld [hl], a ld hl, wMenuData_ItemsPointerAddr ld a, [hli] ld h, [hl] ld l, a ld a, [wSwitchItem] cp [hl] jr nz, .asm_24a25 dec [hl] ld a, [wSwitchItem] call ItemSwitch_GetNthItem ld [hl], $ff xor a ld [wSwitchItem], a ret .asm_24a25 dec [hl] call ItemSwitch_ConvertItemFormatToDW push bc ld a, [wSwitchItem] call ItemSwitch_GetNthItem pop bc push hl add hl, bc pop de .asm_24a34 ld a, [hli] ld [de], a inc de cp $ff jr nz, .asm_24a34 xor a ld [wSwitchItem], a ret Function24a40: call ItemSwitch_GetNthItem ld de, wd002 call ItemSwitch_ConvertItemFormatToDW call CopyBytes ret Function24a4d: call ItemSwitch_GetNthItem ld d, h ld e, l ld hl, wd002 call ItemSwitch_ConvertItemFormatToDW call CopyBytes ret ItemSwitch_GetNthItem: push af call ItemSwitch_ConvertItemFormatToDW ld hl, wMenuData_ItemsPointerAddr ld a, [hli] ld h, [hl] ld l, a inc hl pop af call AddNTimes ret Function24a6c: push hl call ItemSwitch_ConvertItemFormatToDW ld a, d sub e jr nc, .dont_negate dec a cpl .dont_negate ld hl, 0 call AddNTimes ld b, h ld c, l pop hl ret ItemSwitch_ConvertItemFormatToDW: push hl ld a, [wMenuData_ScrollingMenuItemFormat] ld c, a ld b, 0 ld hl, .format_dws add hl, bc add hl, bc ld c, [hl] inc hl ld b, [hl] pop hl ret .format_dws dw 0 dw 1 dw 2 Function24a97: push af call ItemSwitch_ConvertItemFormatToDW ld a, c cp 2 jr nz, .not_2 pop af call ItemSwitch_GetNthItem inc hl ld a, [hl] ret .not_2 pop af ld a, $1 ret Function24aab: .loop ld a, [hld] ld [de], a dec de dec bc ld a, b or c jr nz, .loop ret