pokecrystal-board/engine/battle/move_effects/protect.asm

BattleCommand_Protect:
; protect
	call ProtectChance
	ret c

	ld a, BATTLE_VARS_SUBSTATUS1
	call GetBattleVarAddr
	set SUBSTATUS_PROTECT, [hl]

	call AnimateCurrentMove

	ld hl, ProtectedItselfText
	jp StdBattleTextbox

ProtectChance:
	ld de, wPlayerProtectCount
	ldh a, [hBattleTurn]
	and a
	jr z, .got_count
	ld de, wEnemyProtectCount
.got_count

	call CheckOpponentWentFirst
	jr nz, .failed

; Can't have a substitute.

	ld a, BATTLE_VARS_SUBSTATUS4
	call GetBattleVar
	bit SUBSTATUS_SUBSTITUTE, a
	jr nz, .failed

; Halve the chance of a successful Protect for each consecutive use.

	ld b, $ff
	ld a, [de]
	ld c, a
.loop
	ld a, c
	and a
	jr z, .done
	dec c

	srl b
	ld a, b
	and a
	jr nz, .loop
	jr .failed
.done

.rand
	call BattleRandom
	and a
	jr z, .rand

	dec a
	cp b
	jr nc, .failed

; Another consecutive Protect use.

	ld a, [de]
	inc a
	ld [de], a

	and a
	ret

.failed
	xor a
	ld [de], a
	call AnimateFailedMove
	call PrintButItFailed
	scf
	ret
Remove all address comments 2018-06-24 07:09:41 -07:00			`BattleCommand_Protect:`
split protect and endure effects into battle/effects/ 2013-09-09 18:51:41 -07:00			`; protect`
			`call ProtectChance`
			`ret c`

			`ld a, BATTLE_VARS_SUBSTATUS1`
Rename _GetBattleVar -> GetBattleVarAddr. Functions prefixed with _ imply they're private. The real purpose of this function is to use an address, rather than saving a few cycles on push/pop. 2014-06-14 00:34:57 -07:00			`call GetBattleVarAddr`
split protect and endure effects into battle/effects/ 2013-09-09 18:51:41 -07:00			`set SUBSTATUS_PROTECT, [hl]`

comment and relabel more battle functions 2014-01-01 05:09:15 -08:00			`call AnimateCurrentMove`
split protect and endure effects into battle/effects/ 2013-09-09 18:51:41 -07:00
			`ld hl, ProtectedItselfText`
TextBox -> Textbox Homogenizing names. 2019-04-08 05:15:10 -07:00			`jp StdBattleTextbox`
split protect and endure effects into battle/effects/ 2013-09-09 18:51:41 -07:00
Remove all address comments 2018-06-24 07:09:41 -07:00			`ProtectChance:`
Prefix wram labels with w, part 2. 2018-01-23 14:39:09 -08:00			`ld de, wPlayerProtectCount`
Use labels instead of constants for HRAM Use explicit ldh instruction to access HRAM locations, don't rely on optimizing ld 2018-08-25 11:28:22 -07:00			`ldh a, [hBattleTurn]`
split protect and endure effects into battle/effects/ 2013-09-09 18:51:41 -07:00			`and a`
Identify some more unnamed labels 2020-10-04 16:43:28 -07:00			`jr z, .got_count`
Prefix wram labels with w, part 2. 2018-01-23 14:39:09 -08:00			`ld de, wEnemyProtectCount`
Identify some more unnamed labels 2020-10-04 16:43:28 -07:00			`.got_count`
split protect and endure effects into battle/effects/ 2013-09-09 18:51:41 -07:00
Some work on battle animations 2015-11-09 13:41:09 -08:00			`call CheckOpponentWentFirst`
split protect and endure effects into battle/effects/ 2013-09-09 18:51:41 -07:00			`jr nz, .failed`

			`; Can't have a substitute.`

			`ld a, BATTLE_VARS_SUBSTATUS4`
fix labels for and rename GetBattleVarPair to GetBattleVar 2013-10-11 00:04:21 -07:00			`call GetBattleVar`
split protect and endure effects into battle/effects/ 2013-09-09 18:51:41 -07:00			`bit SUBSTATUS_SUBSTITUTE, a`
			`jr nz, .failed`

			`; Halve the chance of a successful Protect for each consecutive use.`

			`ld b, $ff`
			`ld a, [de]`
			`ld c, a`
			`.loop`
			`ld a, c`
			`and a`
			`jr z, .done`
			`dec c`

			`srl b`
			`ld a, b`
			`and a`
			`jr nz, .loop`
			`jr .failed`
			`.done`

			`.rand`
			`call BattleRandom`
			`and a`
			`jr z, .rand`

			`dec a`
			`cp b`
			`jr nc, .failed`

			`; Another consecutive Protect use.`

			`ld a, [de]`
			`inc a`
			`ld [de], a`

			`and a`
			`ret`

			`.failed`
			`xor a`
			`ld [de], a`
comment and relabel more battle functions 2014-01-01 05:09:15 -08:00			`call AnimateFailedMove`
split protect and endure effects into battle/effects/ 2013-09-09 18:51:41 -07:00			`call PrintButItFailed`
			`scf`
			`ret`