Bufio: module{	PATH:		con "/dis/lib/bufio.dis"; 	SEEKSTART:	con Sys->SEEKSTART;	SEEKRELA:	con Sys->SEEKRELA;	SEEKEND:	con Sys->SEEKEND; 	OREAD:		con Sys->OREAD;	OWRITE:		con Sys->OWRITE;	ORDWR:		con Sys->ORDWR; 	EOF:		con -1;	ERROR:		con -2; 	Iobuf: adt {		seek:		fn(b: self ref Iobuf, n: big, where: int): big;		offset:		fn(b: self ref Iobuf): big; 		read:		fn(b: self ref Iobuf, a: array of byte, n: int): int;		write:		fn(b: self ref Iobuf, a: array of byte, n: int): int; 		getb:		fn(b: self ref Iobuf): int;		getc:		fn(b: self ref Iobuf): int;		gets:		fn(b: self ref Iobuf, sep: int): string;		gett:		fn(b: self ref Iobuf, sep: string): string; 		ungetb:		fn(b: self ref Iobuf): int;		ungetc:		fn(b: self ref Iobuf): int; 		putb:		fn(b: self ref Iobuf, b: byte): int;		putc:		fn(b: self ref Iobuf, c: int): int;		puts:		fn(b: self ref Iobuf, s: string): int; 		flush:		fn(b: self ref Iobuf): int;		close:		fn(b: self ref Iobuf); 		setfill:	fn(b: self ref Iobuf, f: BufioFill); 		# Internal variables		fd:		ref Sys->FD;	# the file		buffer:		array of byte;	# the buffer		index:		int;		# read/write pointer in buffer		size:		int;		# characters remaining/written		dirty:		int;		# needs flushing		bufpos:		big;		# position in file of buf[0]		filpos:		big;		# current file pointer		lastop:		int;		# OREAD or OWRITE		mode:		int;		# mode of open	}; 	open:		fn(name: string, mode: int): ref Iobuf;	create:		fn(name: string, mode, perm: int): ref Iobuf;	fopen:		fn(fd: ref Sys->FD, mode: int): ref Iobuf;	sopen:		fn(input: string): ref Iobuf;	aopen:		fn(input: array of byte): ref Iobuf;}; BufioFill: module{	fill:	fn(b: ref Bufio->Iobuf): int;}; ChanFill: module{	PATH:	con "/dis/lib/chanfill.dis"; 	init:	fn(data: array of byte, fid: int, wc: Sys->Rwrite, r: ref Sys->FileIO, b: Bufio): ref Bufio->Iobuf;	fill:	fn(b: ref Bufio->Iobuf): int;};