Method OpenTableFile

storage/connect/filamtxt.cpp:546–621

/ OpenTableFile: Open a DOS/UNIX table file using C standard I/Os. */ /

/*  OpenTableFile: Open a DOS/UNIX table file using C standard I/Os.   */
/***********************************************************************/
bool DOSFAM::OpenTableFile(PGLOBAL g)
  {
  char    opmode[4], filename[_MAX_PATH];
//int     ftype = Tdbp->GetFtype();
  MODE    mode = Tdbp->Mode;
  PDBUSER dbuserp = PlgGetUser(g);

  // This is required when using Unix files under Windows and vice versa
//Bin = (Blocked || Ending != CRLF);
  Bin = true;             // To avoid ftell problems

  switch (mode) {
    case MODE_READ:
      snprintf(opmode, sizeof(opmode), "r");
      break;
    case MODE_DELETE:
      if (!Tdbp->Next) {
        // Store the number of deleted lines
        DelRows = Cardinality(g);

        if (Blocked) {
          // Cardinality must return 0
          Block = 0;
          Last = Nrec;
          } // endif blocked

        // This will erase the entire file
        snprintf(opmode, sizeof(opmode), "w");
        Tdbp->ResetSize();
        break;
        } // endif

      // Selective delete, pass thru
      Bin = true;
      /* fall through */
    case MODE_UPDATE:
      if ((UseTemp = Tdbp->IsUsingTemp(g))) {
        snprintf(opmode, sizeof(opmode), "r");
        Bin = true;
      } else
        snprintf(opmode, sizeof(opmode), "r+");

      break;
    case MODE_INSERT:
      snprintf(opmode, sizeof(opmode), "a+");
      break;
    default:
      snprintf(g->Message, sizeof(g->Message), MSG(BAD_OPEN_MODE), mode);
      return true;
    } // endswitch Mode

  // For blocked I/O or for moving lines, open the table in binary
  safe_strcat(opmode, sizeof(opmode), (Bin) ? "b" : "t");

  // Now open the file stream
  PlugSetPath(filename, To_File, Tdbp->GetPath());

  if (!(Stream = PlugOpenFile(g, filename, opmode))) {