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support old LPK archives with different index entry size.

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This commit is contained in:
morkt 2015-07-19 15:32:07 +04:00
parent d283ea800f
commit 71c6623918
1 changed files with 19 additions and 11 deletions
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30
ArcFormats/ArcLPK.cs
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@ -104,7 +104,7 @@ namespace GameRes.Formats.Lucifen
public static readonly Dictionary<string, EncryptionScheme> KnownSchemes =
new Dictionary<string, EncryptionScheme> {
{ "Default", DefaultScheme },
{ "Lycoris Radiata", new EncryptionScheme {
{ "Terios games", new EncryptionScheme {
BaseKey = new Key (0x39A5B67D, 0xD63AB5E9), ContentXor = 0xa6, RotatePattern = 0x36147352,
ImportGameInit = false } },
};
@ -182,9 +182,9 @@ namespace GameRes.Formats.Lucifen
{
if (0 == CurrentFileMap.Count)
ImportKeys (file.Name);
if (!CurrentFileMap.TryGetValue (name, out file_key))
return null;
}
if (!CurrentFileMap.TryGetValue (name, out file_key) && CurrentScheme.ImportGameInit)
return null;
return Open (basename, file, CurrentScheme, file_key);
}
@ -421,13 +421,15 @@ namespace GameRes.Formats.Lucifen
int m_index_width;
int m_entries_offset;
public LpkInfo Info { get { return m_info; } }
public LpkInfo Info { get { return m_info; } }
public int EntrySize { get; private set; }
public IndexReader (LpkInfo info)
{
if (!info.Flag1)
throw new NotSupportedException ("Not supported LPK index format");
m_info = info;
EntrySize = m_info.PackedEntries ? 13 : 9;
}
public List<Entry> Read (byte[] index)
@ -448,6 +450,12 @@ namespace GameRes.Formats.Lucifen
int letter_table_length = LittleEndian.ToInt32 (m_index, index_offset);
index_offset += 4;
m_entries_offset = index_offset + letter_table_length;
if (m_entries_offset >= m_index.Length)
return null;
if ((m_index.Length - m_entries_offset) / EntrySize < count)
EntrySize = (m_index.Length - m_entries_offset) / count;
if (EntrySize < 8 || m_info.PackedEntries && EntrySize < 12)
return null;
m_dir = new List<Entry> (count);
m_name = new byte[260];
@ -486,16 +494,16 @@ namespace GameRes.Formats.Lucifen
Type = FormatCatalog.Instance.GetTypeFromName (name),
IsPacked = m_info.PackedEntries,
};
int entry_size = m_info.PackedEntries ? 13 : 9;
int entry_pos = m_entries_offset + entry_size*entry_num;
if (entry_pos+entry_size > m_index.Length)
int entry_pos = m_entries_offset + EntrySize * entry_num;
if (entry_pos+EntrySize > m_index.Length)
throw new InvalidFormatException ("Invalid LPK entry index");
entry.Flag = m_index[entry_pos];
long offset = LittleEndian.ToUInt32 (m_index, entry_pos+1);
if (0 != (EntrySize & 1))
entry.Flag = m_index[entry_pos++];
long offset = LittleEndian.ToUInt32 (m_index, entry_pos);
entry.Offset = m_info.AlignedOffset ? offset << 11 : offset;
entry.Size = LittleEndian.ToUInt32 (m_index, entry_pos+5);
entry.Size = LittleEndian.ToUInt32 (m_index, entry_pos+4);
if (entry.IsPacked)
entry.UnpackedSize = LittleEndian.ToUInt32 (m_index, entry_pos+9);
entry.UnpackedSize = LittleEndian.ToUInt32 (m_index, entry_pos+8);
else
entry.UnpackedSize = entry.Size;
m_dir.Add (entry);