/// <summary>
/// 同步解压一个IFS文件内存流
/// </summary>
/// <param name="filePath"></param>
/// <param name="outDir"></param>
/// <returns></returns>
public static bool SyncUnarchiveIFSFile(MemoryStream fileS, string outDir)
{
if (FileUtil.IsDirectoryExist(outDir))
{
FileUtil.ClearDirectory(outDir);
}
else
{
FileUtil.CreateDirectory(outDir);
}
//
JW.Common.Log.LogD("Begin->");
Stopwatch st = new Stopwatch();
st.Start();
//
IFSFile ifsFile = new IFSFile();
//获取签名
byte[] bbs = new byte[16];
int offset = 0;
fileS.Read(bbs, 0, 16);
uint sig = (uint)ConvertBytesToInt(bbs, ref offset);
if (sig != IFSFile.IFSSignature)
{
JW.Common.Log.LogE("IFSArchiver SyncUnarchiveIFSFile Error Signature ");
fileS.Close();
return(false);
}
ifsFile.Signature = sig;
//获取压缩方式
ifsFile.CompressType = (IFSCompressType)ConvertBytesToInt(bbs, ref offset);
//条目个数
ifsFile.EntryCount = ConvertBytesToInt(bbs, ref offset);
//名称长度
int entryNameL = ConvertBytesToInt(bbs, ref offset);
if (ifsFile.EntryCount == 0)
{
JW.Common.Log.LogE("IFSArchiver SyncUnarchiveIFSFile Error EntryCount");
fileS.Close();
return(false);
}
//条目名称段
ifsFile.Entrys = new IFSEntry[ifsFile.EntryCount];
for (int i = 0; i < ifsFile.EntryCount; i++)
{
ifsFile.Entrys[i] = new IFSEntry();
}
//
bbs = null;
//
byte[] names = new byte[entryNameL];
fileS.Read(names, 0, entryNameL);
offset = 0;
//读取条目名称
for (int i = 0; i < ifsFile.EntryCount; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
entry.Name = ConvertBytesToString(names, ref offset);
}
//条目数据位置
offset = 0;
names = null;
byte[] poss = new byte[ifsFile.EntryCount * 4];
fileS.Read(poss, 0, ifsFile.EntryCount * 4);
for (int i = 0; i < ifsFile.EntryCount; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
int vv = ConvertBytesToInt(poss, ref offset);
entry.DataPos = vv;
}
offset = 0;
poss = null;
#region 无压缩 直接解压
//无压缩 直接解压
if (ifsFile.CompressType == IFSCompressType.None)
{
bool isOk = false;
try
{
//公用buffer
byte[] buffer = new byte[4 * 1024];
//解压数据到文件
for (int i = 0; i < ifsFile.EntryCount; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
string outPath = FileUtil.CombinePaths(outDir, entry.Name);
string directory = Path.GetDirectoryName(outPath);
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
FileStream output = new FileStream(outPath, FileMode.Create);
try
{
fileS.Seek(entry.DataPos, SeekOrigin.Begin);
byte[] ll = new byte[4];
fileS.Read(ll, 0, 4);
offset = 0;
int vv = ConvertBytesToInt(ll, ref offset);
entry.DataSize = vv;
//
bool copying = true;
int processed = 0;
while (copying)
{
int bytesRead = fileS.Read(buffer, 0, buffer.Length);
if (bytesRead > 0)
{
if (entry.DataSize <= bytesRead)
{
output.Write(buffer, 0, entry.DataSize);
copying = false;
}
else
{
processed += bytesRead;
if (processed > entry.DataSize)
{
output.Write(buffer, 0, bytesRead - (processed - entry.DataSize));
copying = false;
}
else
{
output.Write(buffer, 0, bytesRead);
copying = true;
}
}
}
else
{
copying = false;
}
}
//
output.Flush();
}
catch (Exception exc)
{
JW.Common.Log.LogE("Failed:" + entry.Name + "---" + exc.ToString());
}
finally
{
output.Close();
output.Dispose();
output = null;
}
}
}
catch (Exception exc)
{
JW.Common.Log.LogE("IFSArchiver SyncUnarchiveIFSFile:" + exc.ToString());
isOk = false;
}
finally
{
st.Stop();//终止计时
JW.Common.Log.LogD("Done:" + st.ElapsedMilliseconds.ToString());
fileS.Close();
fileS.Dispose();
fileS = null;
}
st.Stop();//终止计时
JW.Common.Log.LogD("Done:" + st.ElapsedMilliseconds.ToString());
return(isOk);
}
#endregion
//
if (ifsFile.CompressType == IFSCompressType.LZMA)
{
bool isOk = DoUnarchiveLZMAIFSFile(ifsFile, outDir, fileS);
st.Stop();
JW.Common.Log.LogD("Done:" + st.ElapsedMilliseconds.ToString());
return(isOk);
}
return(true);
}
//
private static bool DoUnarchiveLZMAIFSFile(IFSFile ifsFile, string outDir, Stream fileS)
{
bool isOk = true;
try
{
//公用buffer
byte[] buffer = new byte[4 * 1024];
int offset = 0;
//解压数据到文件
for (int i = 0; i < ifsFile.EntryCount; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
JW.Common.Log.LogD("Un LZMA File:" + entry.Name);
//
fileS.Seek(entry.DataPos, SeekOrigin.Begin);
byte[] ll = new byte[4];
fileS.Read(ll, 0, 4);
offset = 0;
int vv = ConvertBytesToInt(ll, ref offset);
entry.DataSize = vv;
//解压
string outPath = FileUtil.CombinePaths(outDir, entry.Name);
string directory = Path.GetDirectoryName(outPath);
if (!Directory.Exists(directory))
{
Directory.CreateDirectory(directory);
}
FileStream output = new FileStream(outPath, FileMode.Create);
try
{
SevenZip.Compression.LZMA.Decoder coder = new SevenZip.Compression.LZMA.Decoder();
byte[] properties = new byte[5];
fileS.Read(properties, 0, 5);
byte[] fileLengthBytes = new byte[8];
fileS.Read(fileLengthBytes, 0, 8);
long fileLength = BitConverter.ToInt64(fileLengthBytes, 0);
coder.SetDecoderProperties(properties);
coder.Code(fileS, output, entry.DataSize, fileLength, null);
output.Flush();
}
catch (Exception exc)
{
JW.Common.Log.LogE("LZMA Failed:" + entry.Name + "---" + exc.ToString());
}
finally
{
output.Close();
output.Dispose();
output = null;
}
}
}
catch (Exception exc)
{
JW.Common.Log.LogE("LZMA Failed:" + exc.ToString());
isOk = false;
}
finally
{
fileS.Close();
fileS.Dispose();
}
return(isOk);
}
//归档一批文件
private static bool DoArchiveDir(string[] needfiles, string indir, string outPath, IFSCompressType compressType)
{
if (needfiles == null || needfiles.Length == 0)
{
return(false);
}
//
int fileCnt = needfiles.Length;
//
IFSFile ifsFile = new IFSFile();
ifsFile.EntryCount = fileCnt;
ifsFile.CompressType = compressType;
ifsFile.Entrys = new IFSEntry[fileCnt];
for (int i = 0; i < fileCnt; i++)
{
ifsFile.Entrys[i] = new IFSEntry();
}
//
//初始化条目
for (int i = 0; i < fileCnt; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
string relativePath = FileUtil.GetRelativePath(needfiles[i], indir);
entry.Name = relativePath;
entry.DataSize = FileUtil.GetFileLength(needfiles[i]);
}
int entryNameSegL = 0;
//写入开始
int begin = 0;
//签名
begin += 4;
//压缩方式
begin += 4;
//条目个数
begin += 4;
//条目名字段长度
begin += 4;
//条目名称信息
for (int i = 0; i < ifsFile.Entrys.Length; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
int l = GetStringBytesLength(entry.Name);
begin += l;
entryNameSegL += l;
}
//条目数据位置段
for (int i = 0; i < ifsFile.Entrys.Length; i++)
{
begin += 4;
}
//设置
for (int i = 0; i < ifsFile.Entrys.Length; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
if (i == 0)
{
entry.DataPos = begin;
}
else
{
IFSEntry entryPre = ifsFile.Entrys[i - 1];
//数据开始位置是上一个的开始位置+4+L
entry.DataPos = entryPre.DataPos + 4 + entryPre.DataSize;
}
}
//开始写
//写大文件
FileStream outIfs = new FileStream(outPath, FileMode.Create);
//先写入文件头签名
byte[] bb = ConvertIntToBytes((int)ifsFile.Signature);
outIfs.Write(bb, 0, bb.Length);
//写入压缩方式
bb = ConvertIntToBytes((int)ifsFile.CompressType);
outIfs.Write(bb, 0, bb.Length);
//条目个数
bb = ConvertIntToBytes(ifsFile.Entrys.Length);
outIfs.Write(bb, 0, bb.Length);
//条目名称总长度
bb = ConvertIntToBytes(entryNameSegL);
outIfs.Write(bb, 0, bb.Length);
//条目名字信息
for (int i = 0; i < ifsFile.Entrys.Length; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
byte[] bbs = ConvertStringToBytes(entry.Name);
//名字
outIfs.Write(bbs, 0, bbs.Length);
}
//条目数据位置开始位置索引写入
for (int i = 0; i < ifsFile.Entrys.Length; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
byte[] bbs = ConvertIntToBytes(entry.DataPos);
//名字
outIfs.Write(bbs, 0, bbs.Length);
}
try
{
//写入所有文件数据
for (int i = 0; i < ifsFile.Entrys.Length; i++)
{
IFSEntry entry = ifsFile.Entrys[i];
//长度
byte[] ddl = ConvertIntToBytes(entry.DataSize);
outIfs.Write(ddl, 0, ddl.Length);
//写入数据
byte[] fileData = FileUtil.ReadFile(needfiles[i]);
outIfs.Write(fileData, 0, entry.DataSize);
}
}
catch (Exception exc)
{
JW.Common.Log.LogE("Archive Exception:" + exc.ToString());
return(false);
}
outIfs.Flush();
outIfs.Close();
return(true);
}
