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
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
INTERFACE RCSEdit;
IMPORT RCSString;
CONST
Brand = "RCSEdit";
TYPE
T = REF RECORD
offset: INTEGER; (* Line number offset: input minus output. *)
text: REF ARRAY OF RCSString.T; (* Added lines of text, or NIL. *)
END;
An RCSEdit.T represents a single edit of a file. It consists of a
deletion, addition, or replacement (deletion plus addition) of one or
more consecutive lines of text. Within an RCS file, each delta
except the head delta is represented by a sequence of such edits.
An edit is applied to an input text, and produces an output text.
The offset member is the difference between the input file's line
number and the output file's line number at the point where the edit
is applied. It represents the accumulated effects of the additions
and deletions effected by the prior edits. The text member, if
non-NIL, contains one or more lines of text to be added at the
point of the edit. It is NIL for a plain deletion.
END RCSEdit.