Copyright 1996-2003 John D. Polstra.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgment:
* This product includes software developed by John D. Polstra.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* $Id: RsyncFile.i3.html,v 1.3 2010-04-29 17:20:02 wagner Exp $
INTERFACE RsyncFile;
IMPORT FileAttr, OSError, Pathname, RsyncBlock, Thread, Wr;
TYPE
T <: Public;
Public = OBJECT
(* These are all READONLY. *)
attr: FileAttr.T;
blockSize: CARDINAL;
END;
PROCEDURE Open(p: Pathname.T;
blockSize: CARDINAL := 0): T
RAISES {OSError.E};
If blockSize is specified, it will be used exactly. Otherwise, a
suitable value will be chosen.
PROCEDURE Close(rf: T)
RAISES {OSError.E};
PROCEDURE GetMD5(rf: T): TEXT;
Return the MD5 checksum of the entire file in text form.
Generating the checksums from the file to be updated.
TYPE
BlockIterator = OBJECT METHODS
next(VAR block: RsyncBlock.T): BOOLEAN;
END;
PROCEDURE IterateBlocks(rf: T): BlockIterator;
Generating the diffs from the master file.
TYPE
BlockRange = RECORD
start: CARDINAL; (* First block. *)
count: CARDINAL; (* Number of blocks. *)
END;
DiffIterator = OBJECT METHODS
next(wr: Wr.T; VAR blocks: BlockRange): BOOLEAN
RAISES {Thread.Alerted, Wr.Failure};
END;
PROCEDURE IterateDiffs(rf: T;
blocks: REF ARRAY OF RsyncBlock.T): DiffIterator;
END RsyncFile.