Copyright 1999-2003 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: RCSPhrase.m3.html,v 1.3 2010-04-29 17:20:02 wagner Exp $
MODULE RCSPhrase;
TYPE
RCSWord = REF RECORD
next: RCSWord := NIL;
word: TEXT;
isString: BOOLEAN;
END;
REVEAL
T = BRANDED Brand REF RECORD
key: TEXT;
values: RCSWord := NIL;
tail: RCSWord := NIL;
END;
WordIterator = WordIterPublic BRANDED OBJECT
cur: RCSWord;
OVERRIDES
next := WordIterNext;
END;
PROCEDURE New(key: TEXT): T =
BEGIN
RETURN NEW(T, key := key);
END New;
PROCEDURE Append(np: T; word: TEXT; isString: BOOLEAN) =
VAR
tok := NEW(RCSWord, word := word, isString := isString);
BEGIN
IF np.tail = NIL THEN
np.values := tok;
ELSE
np.tail.next := tok;
END;
np.tail := tok;
END Append;
PROCEDURE GetKey(np: T): TEXT =
BEGIN
RETURN np.key;
END GetKey;
PROCEDURE IterateWords(np: T): WordIterator =
BEGIN
RETURN NEW(WordIterator, cur := np.values);
END IterateWords;
PROCEDURE WordIterNext(self: WordIterator;
VAR word: TEXT;
VAR isString: BOOLEAN): BOOLEAN =
BEGIN
IF self.cur # NIL THEN
word := self.cur.word;
isString := self.cur.isString;
self.cur := self.cur.next;
RETURN TRUE;
END;
RETURN FALSE;
END WordIterNext;
BEGIN
END RCSPhrase.