/// <summary> 使用外部的<see cref="WzFileStream"/>讀取資料 </summary>
public bool Read(WzFileStream zs)
{
string identifier = zs.ReadString(4);
if (!identifier.Equals("PKG1"))
{
return(false);
}
this.DataSize = zs.Read8();
this.DataOffset = zs.Read4u();
this.Description = zs.ReadString((int)(this.DataOffset - zs.Tell()));
zs.BaseOffset = this.DataOffset;
ushort cryptedHash = zs.Read2u();
this.RootDirectory.Offset = (uint)zs.Tell();
for (int j = 0; j < 0xFFFF; j++)
{
this.Hash = HashTools.GenerateArchiveVersionHash(j.ToString());
if (HashTools.EncryptArchiveVersionHash(this.Hash) == cryptedHash)
{
zs.StringPool.Clear();
if (this.RootDirectory.Read(zs))
{
this.Version = j;
return(true);
}
}
}
return(false);
}
internal bool Read(WzFileStream zs)
{
this.Items.Clear();
zs.Seek(this.Offset);
int count = zs.Read4(true);
for (int i = 0; i < count; i++)
{
WzArchiveItem item = null;
WzArchiveItemType itemtype;
string itemname = zs.StringPool.DirectoryRead(out itemtype, WzArchiveItemType.Reference);
if (itemtype == WzArchiveItemType.Directory)
{
item = new WzDirectory(itemname);
}
else if (itemtype == WzArchiveItemType.File)
{
item = new WzFile(itemname, zs.KeyType)
{
Stream = zs.BaseStream
};
}
else
{
throw new InvalidDataException("Undefined item type : " + (int)itemtype);
}
item.Size = zs.Read4(true);
item.Checksum = zs.Read4(true);
uint offKey = HashTools.GenerateOffsetKey((uint)zs.Tell(), this.Archive.DataOffset, this.Archive.Hash);
item.Offset = HashTools.DecryptOffsetHash(zs.Read4u(), offKey, this.Archive.DataOffset);
if ((item.Offset + item.Size) > zs.Length)
{
return(false);
}
this.Add(item);
}
for (int i = 0; i < this.Items.Count; i++)
{
if (this.Items[i].Type == WzArchiveItemType.Directory)
{
(this.Items[i] as WzDirectory).Read(zs);
}
}
return(true);
}