private bool Init()
{
//分析备用
int totalL = (int)_stream.Length;
if (totalL < 20)
{
JW.Common.Log.LogE("IFSFile InitWithData Error IFS File Length");
return(false);
}
//获取签名
byte[] bbs = new byte[16];
int offset = 0;
_stream.Read(bbs, 0, 16);
uint sig = (uint)IFSArchiver.ConvertBytesToInt(bbs, ref offset);
if (sig != IFSFile.IFSSignature)
{
JW.Common.Log.LogE("IFSFile InitWithData Error Signature ");
return(false);
}
this.Signature = sig;
//获取压缩方式
this.CompressType = (IFSCompressType)IFSArchiver.ConvertBytesToInt(bbs, ref offset);
//条目个数
this.EntryCount = IFSArchiver.ConvertBytesToInt(bbs, ref offset);
//名称长度
int entryNameL = IFSArchiver.ConvertBytesToInt(bbs, ref offset);
if (this.EntryCount == 0)
{
JW.Common.Log.LogE("IFSFile InitWithData Error EntryCount");
return(false);
}
//条目名称段
this.Entrys = new IFSEntry[this.EntryCount];
this._entryDic = new JWObjDictionary <string, IFSEntry>(this.EntryCount);
for (int i = 0; i < this.EntryCount; i++)
{
this.Entrys[i] = new IFSEntry();
}
//
bbs = null;
//
byte[] names = new byte[entryNameL];
_stream.Read(names, 0, entryNameL);
offset = 0;
//读取条目名称
for (int i = 0; i < this.EntryCount; i++)
{
IFSEntry entry = this.Entrys[i];
entry.Name = IFSArchiver.ConvertBytesToString(names, ref offset);
if (_entryDic.ContainsKey(entry.Name))
{
JW.Common.Log.LogE("IFSFile Repeat Entry:" + entry.Name);
}
else
{
_entryDic.Add(entry.Name, entry);
}
}
//条目数据位置
offset = 0;
names = null;
byte[] poss = new byte[this.EntryCount * 4];
_stream.Read(poss, 0, this.EntryCount * 4);
for (int i = 0; i < this.EntryCount; i++)
{
IFSEntry entry = this.Entrys[i];
int vv = IFSArchiver.ConvertBytesToInt(poss, ref offset);
entry.DataPos = vv;
}
offset = 0;
poss = null;
return(true);
}
/// <summary>
/// 获取条目数据
/// </summary>
/// <param name="name">条目名称</param>
/// <returns></returns>
public byte[] GetEntryData(string name)
{
if (this.CompressType == IFSCompressType.LZMA)
{
JW.Common.Log.LogE("IFSFile GetEntryData Error No Support LZMA Entry TODO");
return(null);
}
if (this.EntryCount <= 0)
{
JW.Common.Log.LogE("IFSFile GetEntryData Error No Init");
return(null);
}
if (_stream == null)
{
JW.Common.Log.LogE("IFSFile GetEntryData Error No Init");
return(null);
}
IFSEntry find = null;
if (!_entryDic.TryGetValue(name, out find))
{
find = null;
}
//for (int i = 0; i < this.EntryCount; i++)
//{
// IFSEntry e = Entrys[i];
// if (e.Name.Equals(name))
// {
// find = e;
// break;
// }
//}
if (find == null)
{
JW.Common.Log.LogE("IFSFile GetEntryData Error No Entry :" + name);
return(null);
}
if (find.Data != null)
{
return(find.Data);
}
//读取
_stream.Seek(find.DataPos, SeekOrigin.Begin);
byte[] ll = new byte[4];
_stream.Read(ll, 0, 4);
int offset = 0;
int vv = IFSArchiver.ConvertBytesToInt(ll, ref offset);
find.DataSize = vv;
//
if (vv == 0)
{
JW.Common.Log.LogE("IFSFile GetEntryData Error No Entry Data:" + name);
return(null);
}
byte[] buffer = new byte[vv];
_stream.Read(buffer, 0, buffer.Length);
//
find.Data = buffer;
//
return(buffer);
}