nl_tokens: seek last length bytes of file for EOCDR
pl_tokens: function doSeek ( <mask> , eocdrNotFoundCallback ) { reader . readUint8Array ( reader . size - length , length , function ( bytes ) { for ( var i = bytes . length - EOCDR_MIN ; i >= 0 ; i -- ) { if ( bytes [ i ] === 0x50 && bytes [ i + 1 ] === 0x4b && bytes [ i + 2 ] === 0x05 && bytes [ i + 3 ] === 0x06 ) { eocdrCallback ( new DataView ( bytes . buffer , i , EOCDR_MIN ) ) ; return ; } } eocdrNotFoundCallback ( ) ; } , function ( ) { onerror ( ERR_READ ) ; } ) ; }