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Placeholder egg4 trash checks

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This commit is contained in:
Kurt 2021-10-03 00:17:23 -07:00
parent 14f4c7f271
commit c3df0492e9
1 changed files with 125 additions and 31 deletions
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156
PKHeX.Core/Legality/Verifiers/TrashByteVerifier.cs
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@ -62,6 +62,19 @@ namespace PKHeX.Core
return;
}
if (enc is EncounterEgg { Generation: 4 } egg)
{
VerifyTrashNDS_EggNickname4(data, pkm, egg);
VerifyTrashNDS_OT(data, pkm);
return;
}
VerifyTrashNDS_Nickname(data, pkm);
VerifyTrashNDS_OT(data, pkm);
}
private void VerifyTrashNDS_EggNickname4(LegalityAnalysis data, PKM pkm, IEncounterTemplate egg)
{
var trashNick = pkm.Nickname_Trash;
var trashNickIndex = FindTerminator(trashNick, 0xFF);
if (trashNickIndex == -1)
@ -70,23 +83,112 @@ namespace PKHeX.Core
return;
}
if (!HasFinalTerminator(trashNick) && trashNickIndex + 2 != trashNick.Length)
if (HasFinalTerminator(trashNick) || trashNickIndex + 2 == trashNick.Length)
return;
if (!IsValidGen4EggTrash(pkm, egg, trashNickIndex, trashNick))
data.AddLine(GetInvalid($"{nameof(PKM.Nickname_Trash)} should match egg trash details."));
}
private bool IsValidGen4EggTrash(ILangNick pkm, IVersion egg, int start, ReadOnlySpan<byte> trash)
{
var first = start;
var hatchLanguage = pkm.Language;
var maxTrashStart = (hatchLanguage is (int)LanguageID.Japanese or (int)LanguageID.Korean ? 10 : 20) + 2;
var version = egg.Version;
var isLittleEndian = pkm is not BK4;
for (int i = start + 2; i < trash.Length; i += 2)
{
// Allow nicknamed content to insert terminators and keyboard characters inside the mutable region.
var littleEndian = pkm is not BK4;
for (int i = trashNickIndex + 2; i < trashNick.Length; i+=2)
{
var character = littleEndian
? (trashNick[i] | (trashNick[i + 1] << 8))
: (trashNick[i + 1] | (trashNick[i] << 8));
if (character is 0)
{
data.AddLine(GetInvalid($"{nameof(PKM.Nickname_Trash)} has empty trash between terminators."));
return;
}
}
if (i > maxTrashStart)
break;
if (trash[i + 1] == 0xFF && trash[i] == 0xFF)
continue;
var language = GetIsMatchUnderlayer(trash, i, hatchLanguage, version);
if (language == LanguageID.Hacked)
continue;
if (IsTrashOrTerminator4(trash, first, i, isLittleEndian, hatchLanguage))
return true;
}
return true;
}
private static LanguageID GetIsMatchUnderlayer(ReadOnlySpan<byte> trash, int trashStart, int hatchLanguage, GameVersion version)
{
var startLanguage = hatchLanguage == (int)LanguageID.Korean ? LanguageID.Korean : LanguageID.Japanese;
for (var lang = startLanguage; lang <= LanguageID.Korean; lang++)
{
var eggTrash = GetEggTrash(lang, version);
if (HasUnderlayer(trash, eggTrash, trashStart))
return lang;
}
return LanguageID.Hacked;
}
private static ReadOnlySpan<byte> GetEggTrash(LanguageID lang, GameVersion version)
{
return Array.Empty<byte>(); // todo
}
private static bool IsTrashOrTerminator4(ReadOnlySpan<byte> trash, int first, int last, bool isLittleEndian, int language)
{
for (int index = first + 2; index < last - 2; index += 2)
{
if (trash[index + 1] == 0xFF && trash[index] == 0xFF)
continue;
if (!IsValidKeyChar4(trash, isLittleEndian, index, language))
return false;
}
return true;
}
private static bool IsValidKeyChar4(ReadOnlySpan<byte> trash, bool isLittleEndian, int index, int language)
{
var character = isLittleEndian
? (trash[index] | (trash[index + 1] << 8))
: (trash[index + 1] | (trash[index] << 8));
return IsValidKeyChar4(character, language);
}
private static bool IsValidKeyChar4(int character, int language)
{
return character is not 0;
}
private void VerifyTrashNDS_Nickname(LegalityAnalysis data, PKM pkm)
{
var trashNick = pkm.Nickname_Trash;
var trashNickIndex = FindTerminator(trashNick, 0xFF);
if (trashNickIndex == -1)
{
data.AddLine(GetInvalid($"{nameof(PKM.Nickname_Trash)} is missing a terminator."));
return;
}
if (HasFinalTerminator(trashNick) || trashNickIndex + 2 == trashNick.Length)
return;
// Allow nicknamed content to insert terminators and keyboard characters inside the mutable region.
var littleEndian = pkm is not BK4;
for (int i = trashNickIndex + 2; i < trashNick.Length; i += 2)
{
var character = littleEndian
? (trashNick[i] | (trashNick[i + 1] << 8))
: (trashNick[i + 1] | (trashNick[i] << 8));
if (character is not 0)
continue;
data.AddLine(GetInvalid($"{nameof(PKM.Nickname_Trash)} has empty trash between terminators."));
return;
}
}
private void VerifyTrashNDS_OT(LegalityAnalysis data, PKM pkm)
{
var trashOT = pkm.OT_Trash;
var trashOTIndex = FindTerminator(trashOT, 0xFF);
if (trashOTIndex == -1)
@ -95,24 +197,16 @@ namespace PKHeX.Core
return;
}
var littleEndian = pkm is not BK4;
for (int i = trashOTIndex + 2; i < trashOT.Length; i += 2)
{
var littleEndian = pkm is not BK4;
for (int i = trashOTIndex + 2; i < trashOT.Length; i+=2)
{
var character = littleEndian
? (trashOT[i] | (trashOT[i + 1] << 8))
: (trashOT[i + 1] | (trashOT[i] << 8));
if (character is not 0)
{
data.AddLine(GetInvalid($"{nameof(PKM.OT_Trash)} has nonzero trash after terminator."));
return;
}
}
}
if (!HasFinalTerminator(trashOT) && trashOTIndex + 2 != trashOT.Length)
{
data.AddLine(GetInvalid($"{nameof(PKM.OT_Trash)} detected at reserved terminator offset."));
var character = littleEndian
? (trashOT[i] | (trashOT[i + 1] << 8))
: (trashOT[i + 1] | (trashOT[i] << 8));
if (character is 0)
continue;
data.AddLine(GetInvalid($"{nameof(PKM.OT_Trash)} has nonzero trash after terminator."));
return;
}
}