shithub: pokecrystal

ref: 7cac5b787bda37b5ed1fc5ea39e6a96c046cca9d
dir: /engine/pokemon/search_owned.asm/

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BeastsCheck:
; Check if the player owns all three legendary beasts.
; They must exist in either party or PC, and have the player's OT and ID.
; Return the result in wScriptVar.

	ld a, RAIKOU
	ld [wScriptVar], a
	call CheckOwnMonAnywhere
	jr nc, .notexist

	ld a, ENTEI
	ld [wScriptVar], a
	call CheckOwnMonAnywhere
	jr nc, .notexist

	ld a, SUICUNE
	ld [wScriptVar], a
	call CheckOwnMonAnywhere
	jr nc, .notexist

	; they exist
	ld a, 1
	ld [wScriptVar], a
	ret

.notexist
	xor a
	ld [wScriptVar], a
	ret

MonCheck:
; Check if the player owns any Pokémon of the species in wScriptVar.
; Return the result in wScriptVar.

	call CheckOwnMonAnywhere
	jr c, .exists

	; doesn't exist
	xor a
	ld [wScriptVar], a
	ret

.exists
	ld a, 1
	ld [wScriptVar], a
	ret

CheckOwnMonAnywhere:
; Check if the player owns any monsters of the species in wScriptVar.
; It must exist in either party or PC, and have the player's OT and ID.

	; If there are no monsters in the party,
	; the player must not own any yet.

	ld a, [wPartyCount]
	and a
	ret z

; BUG: CheckOwnMon does not check the Day-Care (see docs/bugs_and_glitches.md)
	ld d, a
	ld e, 0
	ld hl, wPartyMon1Species
	ld bc, wPartyMonOTs

	; Run CheckOwnMon on each Pokémon in the party.

.partymon
	call CheckOwnMon
	ret c

	push bc
	ld bc, PARTYMON_STRUCT_LENGTH
	add hl, bc
	pop bc
	call UpdateOTPointer
	dec d
	jr nz, .partymon

	; Run CheckOwnMon on each Pokémon in the PC.

	ld a, BANK(sBoxCount)
	call OpenSRAM
	ld a, [sBoxCount]
	and a
	jr z, .boxes

	ld d, a
	ld hl, sBoxMon1Species
	ld bc, sBoxMonOTs
.openboxmon
	call CheckOwnMon
	jr nc, .loop

	call CloseSRAM
	ret

.loop
	push bc
	ld bc, BOXMON_STRUCT_LENGTH
	add hl, bc
	pop bc
	call UpdateOTPointer
	dec d
	jr nz, .openboxmon

	; Run CheckOwnMon on each monster in the other 13 PC boxes.

.boxes
	call CloseSRAM

	ld c, 0
.box
	; Don't search the current box again.
	ld a, [wCurBox]
	and $f
	cp c
	jr z, .loopbox

	; Load the box.

	ld hl, SearchBoxAddressTable
	ld b, 0
	add hl, bc
	add hl, bc
	add hl, bc
	ld a, [hli]
	call OpenSRAM
	ld a, [hli]
	ld h, [hl]
	ld l, a

	; Number of monsters in the box

	ld a, [hl]
	and a
	jr z, .loopbox

	push bc

	push hl
	ld de, sBoxMons - sBoxCount
	add hl, de
	ld d, h
	ld e, l
	pop hl
	push de
	ld de, sBoxMonOTs - sBoxCount
	add hl, de
	ld b, h
	ld c, l
	pop hl

	ld d, a

.boxmon
	call CheckOwnMon
	jr nc, .loopboxmon

	pop bc
	call CloseSRAM
	ret

.loopboxmon
	push bc
	ld bc, BOXMON_STRUCT_LENGTH
	add hl, bc
	pop bc
	call UpdateOTPointer
	dec d
	jr nz, .boxmon
	pop bc

.loopbox
	inc c
	ld a, c
	cp NUM_BOXES
	jr c, .box

	call CloseSRAM
	and a
	ret

CheckOwnMon:
; Check if a Pokémon belongs to the player and is of a specific species.
; We compare the species we are looking for in [wScriptVar] to the species
; we have in [hl].

; inputs:
; hl, pointer to PartyMonNSpecies
; bc, pointer to PartyMonNOT
; wScriptVar should contain the species we're looking for

; outputs:
; sets carry if monster matches species, ID, and OT name.

	push bc
	push hl
	push de
	ld d, b
	ld e, c

	; check species

	ld a, [wScriptVar]
	ld b, [hl]
	cp b
	jr nz, .notfound

	; check ID number

	ld bc, MON_ID
	add hl, bc
	ld a, [wPlayerID]
	cp [hl]
	jr nz, .notfound
	inc hl
	ld a, [wPlayerID + 1]
	cp [hl]
	jr nz, .notfound

	; check OT

	ld hl, wPlayerName

; BUG: CheckOwnMon only checks the first five letters of OT names (see docs/bugs_and_glitches.md)
rept NAME_LENGTH_JAPANESE - 2
	ld a, [de]
	cp [hl]
	jr nz, .notfound
	cp "@"
	jr z, .found
	inc hl
	inc de
endr

	ld a, [de]
	cp [hl]
	jr z, .found

.notfound
	pop de
	pop hl
	pop bc
	and a
	ret

.found
	pop de
	pop hl
	pop bc
	scf
	ret

SearchBoxAddressTable:
	table_width 3, SearchBoxAddressTable
	dba sBox1
	dba sBox2
	dba sBox3
	dba sBox4
	dba sBox5
	dba sBox6
	dba sBox7
	dba sBox8
	dba sBox9
	dba sBox10
	dba sBox11
	dba sBox12
	dba sBox13
	dba sBox14
	assert_table_length NUM_BOXES

UpdateOTPointer:
	push hl
	ld hl, NAME_LENGTH
	add hl, bc
	ld b, h
	ld c, l
	pop hl
	ret