private byte[] seekAndLoadCttBlock(Stream fs, ContentIndex ci)
{
var ofs = ContentIndexTableEndPos + 8 + ci.Offset;
fs.Seek((long)ofs, SeekOrigin.Begin);
Console.WriteLine();
Console.WriteLine(
$"<!-- seek to 0x{fs.Position:X8}/{fs.Position}, file length = 0x{fs.Length:X8}/{fs.Length} -->");
Console.WriteLine();
#region read this content table
var magicNumber = _seg2.MagicNumber;
var rawData = new byte[ci.CompressedSize];
var r = fs.Read(rawData, 0, rawData.Length);
if (_seg2.MagicNumber == 0)
{
if (ci.CompressedSize == ci.UncompressedSize)
{
return(rawData);
}
magicNumber = 0x01000000;
}
#endregion
#region unzip it
if (magicNumber == 0x02000000)
{
#region InflaterDecompress, Passed
try
{
// var txt = CompressUtil.InflaterDecompress(rawData, 0, rawData.Length);
var txt = Zipper.InflateBufferWithPureZlib(rawData, rawData.Length);
var path = $"{Util.StripPathExt(DictFileName)}.ctt.blk.ofs.{ofs}.txt";
writeFile(path, txt);
// var b = new byte[ci.UncompressedSize];
// Array.Copy(txt, (int) kwi2.CIUncompOffset, b, 0, (int) kwi2.CIUncompLength);
// return b;
return(txt);
}
catch (Exception ex)
{
ErrorLog(ex.ToString());
throw;
}
#endregion
}
else if (magicNumber == 0x01000000)
{
//对于1.2版本格式，可能并未压缩，故如果LZO失败，则将rawdata原样返回
#region 试图进行 LZO Decompress。
//Lzo1x解压缩
var ok = false;
var _decompData = new byte[ci.UncompressedSize];
var _decompSize = 0;
// if (!ok)
{
try
{
Zipper.MiniLzoDecompress(rawData, 0, (int)ci.CompressedSize - 8, _decompData);
ok = _decompData.Length == (int)ci.UncompressedSize;
// var b = new byte[ci.UncompressedSize];
// Array.Copy(_decompData, (int) kwi2.CIUncompOffset, b, 0, (int) kwi2.CIUncompLength);
// return b;
return(_decompData);
}
catch (Exception ex1)
{
ErrorLog(ex1.ToString());
}
}
if (!ok)
{
try
{
// 1.2版本格式，cti数据块的长度为CompressedSize-8，数据块的末尾8个字节含义暂时未知。
//byte[] xyz = new byte[rawdata.Length - 8];
//Array.Copy(rawdata, xyz, xyz.Length);
Zipper.MiniLzoDecompress(rawData, 0, rawData.Length - 8, _decompData);
// _decompSize = Zipper.MiniLzoDecompress(rawdata, 0, rawdata.Length - 8, _decompData);
//xyz = new byte[8];
//byte[] _decompData1 = new byte[100];
//Array.Copy(rawdata, ci.CompressedSize-8, xyz, 0, xyz.Length);
//_decompSize = Zipper.MiniLzoDecompress(xyz, _decompData1);
#region debug
//if (k < 1)
//{
// string path = string.Format("{0}.seg2.cti.{1:D5}.unz", CompressUtil.stripPathExt(fs.Name), k);
// write_file(path, _decompData, _decompSize);
// //write_file(CompressUtil.stripPathExt(fs.Name) + ".seg2.cti." + k + ".unz", _decompData, _decompSize);
//}
#endregion
if (_decompSize == (int)ci.UncompressedSize)
{
return(_decompData);
}
// var b = new byte[kwi2.CIUncompLength];
// Array.Copy(_decompData, (int) kwi2.CIUncompOffset, b, 0, (int) kwi2.CIUncompLength);
// return b;
// //byte[] b = new byte[_decompSize];
// //Array.Copy(_decompData, b, _decompSize);
// //return b;
return(_decompData);
}
catch (Exception ex)
{
//if (this.DictHeader.GeneratedByEngineVersion == "2.0")
{
ErrorLog(ex.ToString());
}
}
}
if (!ok)
{
try
{
Zipper.MiniLzoDecompress(rawData, 0, (int)ci.CompressedSize, _decompData);
// _decompData = LZOHelper.LZOCompressor.Decompress(rawdata, 0, (int) ci.UncompressedSize);
//write_file(path, _decompData, _decompData.Length);
ok = _decompData.Length == (int)ci.UncompressedSize;
}
catch (Exception ex1)
{
ErrorLog(ex1.ToString());
throw;
}
}
#endregion
//此外，1.2版本格式也可能采用了第二种压缩方式，这种情况下ci.UncompressedSize!=ci.CompressedSize
//if (this.DictHeader.GeneratedByEngineVersion == "1.2")
if (ci.UncompressedSize == ci.CompressedSize)
{
//Version 1.2: 数据内容并未压缩故可直接取用。
return(rawData);
}
else
{
return(rawData);
}
}
else
{
throw new Exception($"提取KWIndex时，期望正确的算法标志0x2000000/0x1000000，然而遇到了{_seg2.MagicNumber}");
}
#endregion
}
private KwIndex2List readLevel2Block(int idx, KwIndex1 kw1, Stream fs)
{
var pos = Seg2BeginPos;
// ulong unzipped = 0;
for (var kwiIdx = 0; kwiIdx < idx; kwiIdx++)
{
var kwi = _seg1.IndexList[kwiIdx];
pos += kwi.CompressedSize;
// unzipped += kwi.UncompressedSize;
// Console.WriteLine(
// $"seg 1, block {kwiIdx}, end pos = {pos}/0x{pos:X8} | unzipped offset: {unzipped} | kwi = {kwi}");
}
// Console.WriteLine($"seg 1, block {idx}, start pos = {pos}/0x{pos:X8} | kwi = {kw1}");
var list2 = new KwIndex2List();
fs.Seek((long)pos, SeekOrigin.Begin);
var magicNum = readUInt32(fs);
var j2 = readUInt32(fs);
var rawData = new byte[kw1.CompressedSize - 8];
fs.Read(rawData, 0, rawData.Length);
if (magicNum == 0x02000000)
{
#region InflaterDecompress
try
{
// var txt = CompressUtil.InflaterDecompress(rawData, 0, rawData.Length, false);
// TODO need review and debug
var txt = Zipper.InflateBufferWithPureZlib(rawData, rawData.Length);
#region log & trying to parse 2nd level indexes
var ofs = 0;
while (ofs < txt.Length)
{
var kwi2 = new KwIndex2 {
RelOffsetUL = readUInt64(txt, ofs)
};
ofs += 8;
var ofs0 = ofs;
if (Equals(DictHeader.LanguageMode, Encoding.Unicode))
{
uint x9 = 1;
while (x9 != 0)
{
x9 = readUInt16(txt, ofs);
ofs += 2;
}
}
else
{
while (txt[ofs] != 0)
{
ofs++;
}
ofs++;
}
kwi2.Keyword = DictHeader.LanguageMode.GetString(txt, ofs0, ofs - ofs0).TrimEnd('\0');
list2.Add(kwi2);
}
#endregion
}
catch (Exception ex)
{
ErrorLog(ex.ToString());
throw;
}
#endregion
}
else if (magicNum == 0x01000000)
{
#region LZO.Decompress (V2.0 & V1.2)
#region v1.2: 提取二级索引表
var ofs = 0;
var cZipped = rawData[ofs]; //预览一个word
var zipped = cZipped != (byte)0; //如果头一个byte为0，则实际上该块未压缩。
byte[] decompressedData;
if (!zipped)
{
decompressedData = rawData;
}
else
{
#region TODO: unzip
decompressedData = new byte[kw1.UncompressedSize];
var ok = false;
// var in_len = rawData.Length - 3;
// int out_len = BitConverter.ToInt16(rawData, 1);
// if (!ok)
{
try
{
Zipper.MiniLzoDecompress(rawData, 0, (int)kw1.CompressedSize, decompressedData);
ok = decompressedData.Length == (int)kw1.UncompressedSize;
// Debug.Assert(ok, "M-dict 1.2 lzo decompressed failed.");
}
catch (Exception ex)
{
Debug.WriteLine(ex.ToString());
}
}
if (!ok)
{
ErrorLog("BAD, 1.1");
}
#endregion
}
#region 解释二级索引表
while (ofs < (int)kw1.UncompressedSize)
{
var kwi2 = new KwIndex2 {
RelOffsetUL = readUInt32(decompressedData, ofs)
};
ofs += 4; // if (x1 < 0) { Debug.WriteLine(">>> ???"); }
var ofs0 = ofs;
if (Equals(DictHeader.LanguageMode, Encoding.Unicode))
{
uint x9 = 1;
while (x9 != 0)
{
x9 = readUInt16(decompressedData, ofs);
ofs += 2;
}
}
else
{
while (decompressedData[ofs] != 0)
{
ofs++;
}
ofs++;
}
kwi2.Keyword = DictHeader.LanguageMode.GetString(decompressedData, ofs0, ofs - ofs0)
.TrimEnd('\0');
list2.Add(kwi2);
}
#endregion
#endregion
#endregion
}
else if (magicNum == 0)
{
#region log & trying to parse 2nd level indexes
var ofs = 0;
while (ofs < rawData.Length)
{
var kwi2 = new KwIndex2 {
RelOffsetUL = readUInt32(rawData, ofs)
};
ofs += 4;
var ofs0 = ofs;
if (Equals(DictHeader.LanguageMode, Encoding.Unicode))
{
uint x9 = 1;
while (x9 != 0)
{
x9 = readUInt16(rawData, ofs);
ofs += 2;
}
}
else
{
while (rawData[ofs] != 0)
{
ofs++;
}
ofs++;
}
kwi2.Keyword = DictHeader.LanguageMode.GetString(rawData, ofs0, ofs - ofs0).TrimEnd('\0');
list2.Add(kwi2);
Log($" > {kwi2}");
}
#endregion
}
else
{
throw new Exception(
$"提取KWIndex2[]时，期望正确的算法标志0x2000000/0x1000000，然而遇到了{magicNum}/0x{magicNum:X}");
}
return(list2);
}