m3middle/src/M3File.i3


 Copyright (C) 1994, Digital Equipment Corporation           
 All rights reserved.                                        
 See the file COPYRIGHT for a full description.              
                                                             
 File: M3File.i3                                             
 Last modified on Wed Feb 22 08:42:27 PST 1995 by kalsow     

INTERFACE M3File;

IMPORT File, OSError;

TYPE
  Buffer = ARRAY OF CHAR;
  BufferLength = [0..16_1000000]; (* = 2^24 = 16MBytes *)

PROCEDURE Read (f: File.T; VAR(*OUT*)buf: Buffer; len: BufferLength): INTEGER
  RAISES {OSError.E};
== f.read (LOOPHOLE(buf[0..len-1], ARRAY OF File.Byte), mayBlock := TRUE)

PROCEDURE Copy (src, dest: TEXT) RAISES {OSError.E};
Copy the contents of file src to file dest.

PROCEDURE IsEqual (a, b: TEXT): BOOLEAN RAISES {OSError.E};
Return TRUE if the files a and b are equal.

PROCEDURE IsDirectory (path: TEXT): BOOLEAN;
Return TRUE if path names a directory.

PROCEDURE IsReadable (path: TEXT): BOOLEAN;
Return TRUE if path is a readable file.

END M3File.