Function RARReadHeaderEx

Libraries/unrar/dll.cpp:209–322

int PASCAL RARReadHeaderEx(HANDLE hArcData,struct RARHeaderDataEx *D)
{
  DataSet *Data=(DataSet *)hArcData;
  try
  {
    if ((Data->HeaderSize=(int)Data->Arc.SearchBlock(HEAD_FILE))<=0)
    {
      if (Data->Arc.Volume && Data->Arc.GetHeaderType()==HEAD_ENDARC &&
          Data->Arc.EndArcHead.NextVolume)
        if (MergeArchive(Data->Arc,NULL,false,'L'))
        {
          Data->Arc.Seek(Data->Arc.CurBlockPos,SEEK_SET);
          return RARReadHeaderEx(hArcData,D);
        }
        else
          return ERAR_EOPEN;

      if (Data->Arc.BrokenHeader)
        return ERAR_BAD_DATA;

      // Might be necessary if RARSetPassword is still called instead of
      // open callback for RAR5 archives and if password is invalid.
      if (Data->Arc.FailedHeaderDecryption)
        return ERAR_BAD_PASSWORD;
      
      return ERAR_END_ARCHIVE;
    }
    FileHeader *hd=&Data->Arc.FileHead;
    if (Data->OpenMode==RAR_OM_LIST && hd->SplitBefore)
    {
      int Code=RARProcessFile(hArcData,RAR_SKIP,NULL,NULL);
      if (Code==0)
        return RARReadHeaderEx(hArcData,D);
      else
        return Code;
    }
    wcsncpy(D->ArcNameW,Data->Arc.FileName,ASIZE(D->ArcNameW));
    WideToChar(D->ArcNameW,D->ArcName,ASIZE(D->ArcName));

    wcsncpy(D->FileNameW,hd->FileName,ASIZE(D->FileNameW));
    WideToChar(D->FileNameW,D->FileName,ASIZE(D->FileName));
#ifdef _WIN_ALL
    CharToOemA(D->FileName,D->FileName);
#endif

    D->Flags=0;
    if (hd->SplitBefore)
      D->Flags|=RHDF_SPLITBEFORE;
    if (hd->SplitAfter)
      D->Flags|=RHDF_SPLITAFTER;
    if (hd->Encrypted)
      D->Flags|=RHDF_ENCRYPTED;
    if (hd->Solid)
      D->Flags|=RHDF_SOLID;
    if (hd->Dir)
      D->Flags|=RHDF_DIRECTORY;

    D->PackSize=uint(hd->PackSize & 0xffffffff);