private bool GetHeader(string fileName)
{
this.fileStream.Position = 0;
int filesize = (int)this.FileStream.Length;
if (filesize < 4)
{
goto __failed;
}
string signature = new string(this.BReader.ReadChars(4));
if (signature != "PKG1")
{
goto __failed;
}
int datasize = (int)this.BReader.ReadInt64();
int headersize = this.BReader.ReadInt32();
string copyright = new string(this.BReader.ReadChars(headersize - (int)this.FileStream.Position));
int encver = this.BReader.ReadUInt16();
this.Header = new Wz_Header(signature, copyright, fileName, headersize, datasize, filesize, encver);
return(true);
__failed:
this.header = new Wz_Header(null, null, fileName, 0, 0, filesize, 0);
return(false);
}
private bool GetHeader(string fileName)
{
this.fileStream.Position = 0;
long filesize = this.FileStream.Length;
if (filesize < 4)
{
goto __failed;
}
string signature = new string(this.BReader.ReadChars(4));
if (signature != "PKG1")
{
goto __failed;
}
long dataSize = this.BReader.ReadInt64();
int headerSize = this.BReader.ReadInt32();
string copyright = new string(this.BReader.ReadChars(headerSize - (int)this.FileStream.Position));
// encver detecting:
// Since KMST1132, wz removed the 2 bytes encver, and use a fixed wzver '777'.
// Here we try to read the first 2 bytes from data part and guess if it looks like an encver.
bool encverMissing = false;
int encver = -1;
if (dataSize >= 2)
{
this.fileStream.Position = headerSize;
encver = this.BReader.ReadUInt16();
// encver always less than 256
if (encver > 0xff)
{
encverMissing = true;
}
else if (encver == 0x80)
{
// there's an exceptional case that the first field of data part is a compressed int which determined property count,
// if the value greater than 127 and also to be a multiple of 256, the first 5 bytes will become to
// 80 00 xx xx xx
// so we additional check the int value, at most time the child node count in a wz won't greater than 65536.
if (dataSize >= 5)
{
this.fileStream.Position = headerSize;
int propCount = this.ReadInt32();
if (propCount > 0 && (propCount & 0xff) == 0 && propCount <= 0xffff)
{
encverMissing = true;
}
}
}
}
else
{
// Obviously, if data part have only 1 byte, encver must be deleted.
encverMissing = true;
}
int dataStartPos = headerSize + (encverMissing ? 0 : 2);
this.Header = new Wz_Header(signature, copyright, fileName, headerSize, dataSize, filesize, dataStartPos);
if (encverMissing)
{
// not sure if nexon will change this magic version, just hard coded.
this.Header.SetWzVersion(777);
}
else
{
this.Header.SetOrdinalVersionDetector(encver);
}
return(true);
__failed:
this.header = new Wz_Header(null, null, fileName, 0, 0, filesize, 0);
return(false);
}
