Function ExtractStreams20

Libraries/unrar/win32stm.cpp:4–78

#if !defined(SFX_MODULE) && defined(_WIN_ALL)
void ExtractStreams20(Archive &Arc,const wchar *FileName)
{
  if (Arc.BrokenHeader)
  {
    uiMsg(UIERROR_STREAMBROKEN,Arc.FileName,FileName);
    ErrHandler.SetErrorCode(RARX_CRC);
    return;
  }

  if (Arc.StreamHead.Method<0x31 || Arc.StreamHead.Method>0x35 || Arc.StreamHead.UnpVer>VER_PACK)
  {
    uiMsg(UIERROR_STREAMUNKNOWN,Arc.FileName,FileName);
    ErrHandler.SetErrorCode(RARX_WARNING);
    return;
  }

  wchar StreamName[NM+2];
  if (FileName[0]!=0 && FileName[1]==0)
  {
    // Convert single character names like f:stream to .\f:stream to
    // resolve the ambiguity with drive letters.
    wcsncpyz(StreamName,L".\\",ASIZE(StreamName));
    wcsncatz(StreamName,FileName,ASIZE(StreamName));
  }
  else
    wcsncpyz(StreamName,FileName,ASIZE(StreamName));
  if (wcslen(StreamName)+strlen(Arc.StreamHead.StreamName)>=ASIZE(StreamName) ||
      Arc.StreamHead.StreamName[0]!=':')
  {
    uiMsg(UIERROR_STREAMBROKEN,Arc.FileName,FileName);
    ErrHandler.SetErrorCode(RARX_CRC);
    return;
  }

  wchar StoredName[NM];
  CharToWide(Arc.StreamHead.StreamName,StoredName,ASIZE(StoredName));
  ConvertPath(StoredName+1,StoredName+1,ASIZE(StoredName)-1);

  wcsncatz(StreamName,StoredName,ASIZE(StreamName));

  FindData fd;
  bool Found=FindFile::FastFind(FileName,&fd);

  if ((fd.FileAttr & FILE_ATTRIBUTE_READONLY)!=0)
    SetFileAttr(FileName,fd.FileAttr & ~FILE_ATTRIBUTE_READONLY);

  File CurFile;
  if (CurFile.WCreate(StreamName))
  {
    ComprDataIO DataIO;
    Unpack Unpack(&DataIO);
    Unpack.Init(0x10000,false);

    DataIO.SetPackedSizeToRead(Arc.StreamHead.DataSize);
    DataIO.EnableShowProgress(false);
    DataIO.SetFiles(&Arc,&CurFile);
    DataIO.UnpHash.Init(HASH_CRC32,1);
    Unpack.SetDestSize(Arc.StreamHead.UnpSize);