示例#1
0
        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);
        }
示例#2
0
        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);
        }