private KeyValuePair <string, string>[] Read(ZeroPositionStreamPasser sp)
{
StreamEx s = sp.GetStream();
s.Position = 0x0;
Int32 header = s.ReadInt32BigEndian();
int count = s.ReadInt32BigEndian();
Int32[] keyaddresses = new Int32[count];
Int32[] blockaddress = new Int32[count];
for (int i = 0; i < count; i++)
{
keyaddresses[i] = (Int32)s.Position;
Int32 addrread = s.ReadInt32BigEndian();
keyaddresses[i] = addrread == 0 ? 0 : keyaddresses[i] + addrread;
blockaddress[i] = (Int32)s.Position;
addrread = s.ReadInt32BigEndian();
blockaddress[i] = addrread == 0 ? 0 : blockaddress[i] + addrread;
}
Encoding encoding = Encoding.GetEncoding("utf-8");
KeyValuePair <string, string>[] result = new KeyValuePair <string, string> [count];
for (int i = 0; i < count; i++)
{
string key = "";
string txt = "";
if (keyaddresses[i] != 0)
{
s.Position = keyaddresses[i];
key = s.ReadString((int)(s.Length - s.Position), encoding);
}
// ((
// (blockaddress[i] == 0)
// ? (i + 1 == count ? (Int32)s.Length : keyaddresses[i + 1])
// : blockaddress[i])
// - keyaddresses[i],encoding);
if (blockaddress[i] != 0)
{
// txt = s.ReadString(((i + 1 == count) ? (Int32)s.Length : keyaddresses[i + 1]) - blockaddress[i], encoding);
s.Position = blockaddress[i];
txt = s.ReadString((int)(s.Length - s.Position), encoding);
for (int k = 0; k < _convertChar.Count; k++)
{
txt = txt.Replace(_convertChar[k].Key, _convertChar[k].Value);
}
}
result[i] = new KeyValuePair <string, string>(key, txt);
}
return(result);
}
//使用离散文件包接口，表示文件数据不一定非要连续，即通过位置和长度来确定，连续文件一般只有长度一个数值
//在构造函数中填入文件包读取的部分，对每个文件需要调用PushFile以构造路径信息和各种映射信息
public DAT(ZeroPositionStreamPasser sp) : base(sp)
{
var s = sp.GetStream();
//判断文件头部是否正常
if (s.ReadSimpleString(12) != "NISPACK")
{
throw new InvalidDataException();
}
var NumFile = s.ReadInt32();
RootValue = FileDB.CreateDirectory("", "");
for (var n = 0; n < NumFile; n += 1)
{
//读取索引的各部分
var Name = s.ReadSimpleString(32);
var Address = s.ReadInt32();
var Length = s.ReadInt32();
var Unknown = s.ReadInt32();
//创建一个文件描述信息，包括文件名、文件大小、文件地址
var f = new FileDB(Name, FileDB.FileType.File, Length, Address, null);
//将文件描述信息传递到框架内部
//框架内部能够自动创建文件树(将文件名中以'\'或者'/'表示的文件路径拆开)
//框架内部能够自动创建IndexOfFile映射表，能够将文件描述信息映射到文件索引的出现顺序
//框架内部还记录一些数据用于寻找能放下数据的空洞
PushFile(f);
}
//离散文件在打开的时候应该寻找空洞，以供导入文件使用
//寻找的起始地址是从当前位置的下一个块开始的位置
ScanHoles(GetSpace(s.Position));
}