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function PclZipUtilCopyBlock($p_src, $p_dest, $p_size, $p_mode=0)
  {
    $v_result = 1;

    if ($p_mode==0)
    {
      while ($p_size != 0)
      {
        $v_read_size = ($p_size < PCLZIP_READ_BLOCK_SIZE ? $p_size : PCLZIP_READ_BLOCK_SIZE);
        $v_buffer = @fread($p_src, $v_read_size);
        @fwrite($p_dest, $v_buffer, $v_read_size);
        $p_size -= $v_read_size;
      }
    }
    else if ($p_mode==1)
    {
      while ($p_size != 0)
      {
        $v_read_size = ($p_size < PCLZIP_READ_BLOCK_SIZE ? $p_size : PCLZIP_READ_BLOCK_SIZE);
        $v_buffer = @gzread($p_src, $v_read_size);
        @fwrite($p_dest, $v_buffer, $v_read_size);
        $p_size -= $v_read_size;
      }
    }
    else if ($p_mode==2)
    {
      while ($p_size != 0)
      {
        $v_read_size = ($p_size < PCLZIP_READ_BLOCK_SIZE ? $p_size : PCLZIP_READ_BLOCK_SIZE);
        $v_buffer = @fread($p_src, $v_read_size);
        @gzwrite($p_dest, $v_buffer, $v_read_size);
        $p_size -= $v_read_size;
      }
    }
    else if ($p_mode==3)
    {
      while ($p_size != 0)
      {
        $v_read_size = ($p_size < PCLZIP_READ_BLOCK_SIZE ? $p_size : PCLZIP_READ_BLOCK_SIZE);
        $v_buffer = @gzread($p_src, $v_read_size);
        @gzwrite($p_dest, $v_buffer, $v_read_size);
        $p_size -= $v_read_size;
      }
    }

    // ----- Return
    return $v_result;
  }
  // --------------------------------------------------------------------------------

  // --------------------------------------------------------------------------------
  // Function : PclZipUtilRename()
  // Description :
  //   This function tries to do a simple rename() function. If it fails, it
  //   tries to copy the $p_src file in a new $p_dest file and then unlink the
  //   first one.
  // Parameters :
  //   $p_src : Old filename
  //   $p_dest : New filename
  // Return Values :
  //   1 on success, 0 on failure.
  // --------------------------------------------------------------------------------