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Merge pull request #522 from ketsuban/the-diffening

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Convert code samples to diffs
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Rangi 2018-07-26 16:20:33 -04:00 committed by GitHub
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153
docs/bugs_and_glitches.md
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@ -76,21 +76,21 @@ This is a bug with `SpeciesItemBoost` in [engine/battle/effect_commands.asm](/en
**Fix:**
```asm
```diff
; Double the stat
sla l
rl h
ld a, HIGH(MAX_STAT_VALUE)
cp h
jr c, .cap
ld a, LOW(MAX_STAT_VALUE)
cp l
ret nc
.cap
ld h, HIGH(MAX_STAT_VALUE)
ld l, LOW(MAX_STAT_VALUE)
+
+ ld a, HIGH(MAX_STAT_VALUE)
+ cp h
+ jr c, .cap
+ ld a, LOW(MAX_STAT_VALUE)
+ cp l
+ ret nc
+
+.cap
+ ld h, HIGH(MAX_STAT_VALUE)
+ ld l, LOW(MAX_STAT_VALUE)
ret
```
@ -123,7 +123,7 @@ This is a bug with `DittoMetalPowder` in [engine/battle/effect_commands.asm](/en
**Fix:**
```asm
```diff
ld a, c
srl a
add c
@ -138,17 +138,17 @@ This is a bug with `DittoMetalPowder` in [engine/battle/effect_commands.asm](/en
.done
scf
rr c
ld a, HIGH(MAX_STAT_VALUE)
cp b
jr c, .cap
ld a, LOW(MAX_STAT_VALUE)
cp c
ret nc
.cap
ld b, HIGH(MAX_STAT_VALUE)
ld c, LOW(MAX_STAT_VALUE)
+
+ ld a, HIGH(MAX_STAT_VALUE)
+ cp b
+ jr c, .cap
+ ld a, LOW(MAX_STAT_VALUE)
+ cp c
+ ret nc
+
+.cap
+ ld b, HIGH(MAX_STAT_VALUE)
+ ld c, LOW(MAX_STAT_VALUE)
ret
```
@ -430,16 +430,16 @@ BattleCommand_BeatUpFailText:
**Fix:**
```asm
```diff
BattleCommand_BeatUpFailText:
; beatupfailtext
ld a, [wBeatUpHitAtLeastOnce]
and a
ret nz
inc a
ld [wAttackMissed], a
+
+ inc a
+ ld [wAttackMissed], a
jp PrintButItFailed
```
@ -640,22 +640,22 @@ CalcExpAtLevel:
**Fix:**
```asm
```diff
CalcExpAtLevel:
; (a/b)*n**3 + c*n**2 + d*n - e
ld a, d
cp 1
jr nz, .UseExpFormula
; Pokémon have 0 experience at level 1
xor a
ld hl, hProduct
ld [hli], a
ld [hli], a
ld [hli], a
ld [hl], a
ret
.UseExpFormula
+ ld a, d
+ cp 1
+ jr nz, .UseExpFormula
+; Pokémon have 0 experience at level 1
+ xor a
+ ld hl, hProduct
+ ld [hli], a
+ ld [hli], a
+ ld [hli], a
+ ld [hl], a
+ ret
+
+.UseExpFormula
ld a, [wBaseGrowthRate]
add a
add a
@ -864,10 +864,11 @@ HappinessData_DaisysGrooming:
**Fix:**
```asm
```diff
HappinessData_DaisysGrooming:
db $80, 2, HAPPINESS_GROOMING ; 50% chance
db $ff, 2, HAPPINESS_GROOMING ; 50% chance
- db $ff, 2, HAPPINESS_GROOMING ; 99.6% chance
+ db $80, 2, HAPPINESS_GROOMING ; 50% chance
+ db $ff, 2, HAPPINESS_GROOMING ; 50% chance
```
@ -1061,18 +1062,18 @@ This is a bug with `PlayBattleMusic` in [engine/battle/start_battle.asm](/engine
**Fix:**
```asm
```diff
ld de, MUSIC_ROCKET_BATTLE
cp GRUNTM
jr z, .done
cp GRUNTF
jr z, .done
cp EXECUTIVEM
jr z, .done
cp EXECUTIVEF
jr z, .done
cp SCIENTIST
jr z, .done
+ cp EXECUTIVEM
+ jr z, .done
+ cp EXECUTIVEF
+ jr z, .done
+ cp SCIENTIST
+ jr z, .done
```
@ -1107,10 +1108,12 @@ This is a bug with `DoPlayerMovement.CheckWarp` in [engine/overworld/player_move
**Fix:**
```asm
```diff
ld a, [wWalkingDirection]
cp STANDING
jr z, .not_warp
- ; cp STANDING
- ; jr z, .not_warp
+ cp STANDING
+ jr z, .not_warp
ld e, a
ld d, 0
ld hl, .EdgeWarps
@ -1122,6 +1125,9 @@ This is a bug with `DoPlayerMovement.CheckWarp` in [engine/overworld/player_move
ld a, 1
ld [wd041], a
ld a, [wWalkingDirection]
- ; This is in the wrong place.
- cp STANDING
- jr z, .not_warp
```
@ -1303,15 +1309,27 @@ This is a bug with `PokeBallEffect` in [engine/items/item_effects.asm](/engine/i
**Fix:**
```asm
```diff
ld hl, wEnemySubStatus5
ld a, [hl]
push af
set SUBSTATUS_TRANSFORMED, [hl]
-; This code is buggy. Any wild Pokémon that has Transformed will be
-; caught as a Ditto, even if it was something else like Mew.
-; To fix, do not set [wTempEnemyMonSpecies] to DITTO.
bit SUBSTATUS_TRANSFORMED, a
jr nz, .load_data
- jr nz, .ditto
- jr .not_ditto
+ jr nz, .load_data
-.ditto
- ld a, DITTO
- ld [wTempEnemyMonSpecies], a
- jr .load_data
-
-.not_ditto
- set SUBSTATUS_TRANSFORMED, [hl]
ld hl, wEnemyBackupDVs
ld a, [wEnemyMonDVs]
ld [hli], a
@ -1347,12 +1365,14 @@ This is a bug with `PokeBallEffect` in [engine/items/item_effects.asm](/engine/i
**Fix:**
```asm
```diff
.room_in_party
xor a
ld [wWildMon], a
ld a, [wBattleType]
cp BATTLETYPE_CONTEST
- ld a, [wCurItem]
- cp PARK_BALL
+ ld a, [wBattleType]
+ cp BATTLETYPE_CONTEST
call nz, ReturnToBattle_UseBall
```
@ -1429,10 +1449,10 @@ This is a bug with `PlacePartyMonEvoStoneCompatibility.DetermineCompatibility` i
ld a, [hli]
and a
jr z, .nope
cp EVOLVE_STAT
jr nz, .not_four_bytes
inc hl
.not_four_bytes
+ cp EVOLVE_STAT
+ jr nz, .not_four_bytes
+ inc hl
+.not_four_bytes
inc hl
inc hl
cp EVOLVE_ITEM
@ -1542,11 +1562,12 @@ ValidateTempWildMonSpecies:
**Fix:**
```asm
```diff
ld a, b
ld [wCurPartyLevel], a
ld b, [hl]
ld a, b
- ; ld a, b
+ ld a, b
call ValidateTempWildMonSpecies
jr c, .nowildbattle

52
docs/design_flaws.md
View File

@ -152,21 +152,22 @@ Don't enforce `org $4000` in pokecrystal.link.
Modify `GetFrontpicPointer`:
```asm
```diff
ld a, [wCurPartySpecies]
cp UNOWN
jr z, .unown
ld a, [wCurPartySpecies]
ld hl, PokemonPicPointers
+ ld hl, PokemonPicPointers
ld d, BANK(PokemonPicPointers)
jr .ok
.unown
ld a, [wUnownLetter]
ld hl, UnownPicPointers
+ ld hl, UnownPicPointers
ld d, BANK(UnownPicPointers)
.ok
- ld hl, PokemonPicPointers ; UnownPicPointers
dec a
ld bc, 6
call AddNTimes
@ -175,13 +176,15 @@ Modify `GetFrontpicPointer`:
And `GetMonBackpic`:
```asm
- ; These are assumed to be at the same address in their respective banks.
- ld hl, PokemonPicPointers ; UnownPicPointers
ld a, b
ld hl, PokemonPicPointers
+ ld hl, PokemonPicPointers
ld d, BANK(PokemonPicPointers)
cp UNOWN
jr nz, .ok
ld a, c
ld hl, UnownPicPointers
+ ld hl, UnownPicPointers
ld d, BANK(UnownPicPointers)
.ok
dec a
@ -268,12 +271,26 @@ INCBIN "gfx/footprints/wartortle.1bpp"
Modify `Pokedex_LoadAnyFootprint`:
```asm
```diff
- push hl
ld e, l
ld d, h
ld hl, vTiles2 tile $62
lb bc, BANK(Footprints), 4
- lb bc, BANK(Footprints), 2
+ lb bc, BANK(Footprints), 4
call Request1bpp
- pop hl
-
- ; Whoever was editing footprints forgot to fix their
- ; tile editor. Now each bottom half is 8 tiles off.
- ld de, 8 tiles
- add hl, de
-
- ld e, l
- ld d, h
- ld hl, vTiles2 tile $64
- lb bc, BANK(Footprints), 2
- call Request1bpp
```
@ -341,10 +358,19 @@ Move `ITEM_C3` and `ITEM_DC` above all the TMs in every table of item data.
Modify engine/items/items.asm:
```asm
```diff
GetTMHMNumber::
; 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
@ -353,6 +379,16 @@ GetTMHMNumber::
GetNumberedTMHM:
; 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