+++ /dev/null
-/* CharacterBreakIterator.java - Default character BreakIterator.
- Copyright (C) 1999, 2001 Free Software Foundation, Inc.
-
-This file is part of GNU Classpath.
-
-GNU Classpath is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2, or (at your option)
-any later version.
-
-GNU Classpath is distributed in the hope that it will be useful, but
-WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with GNU Classpath; see the file COPYING. If not, write to the
-Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
-02111-1307 USA.
-
-Linking this library statically or dynamically with other modules is
-making a combined work based on this library. Thus, the terms and
-conditions of the GNU General Public License cover the whole
-combination.
-
-As a special exception, the copyright holders of this library give you
-permission to link this library with independent modules to produce an
-executable, regardless of the license terms of these independent
-modules, and to copy and distribute the resulting executable under
-terms of your choice, provided that you also meet, for each linked
-independent module, the terms and conditions of the license of that
-module. An independent module is a module which is not derived from
-or based on this library. If you modify this library, you may extend
-this exception to your version of the library, but you are not
-obligated to do so. If you do not wish to do so, delete this
-exception statement from your version. */
-
-
-package gnu.java.text;
-
-import java.text.BreakIterator;
-import java.text.CharacterIterator;
-
-/**
- * @author Tom Tromey <tromey@cygnus.com>
- * @date March 19, 1999
- * Written using The Unicode Standard, Version 2.0.
- */
-
-public class CharacterBreakIterator extends BaseBreakIterator
-{
- // Hangul Jamo constants from Unicode book.
- private static final int LBase = 0x1100;
- private static final int VBase = 0x1161;
- private static final int TBase = 0x11a7;
- private static final int LCount = 19;
- private static final int VCount = 21;
- private static final int TCount = 28;
-
- // Information about surrogates.
- private static final int highSurrogateStart = 0xD800;
- private static final int highSurrogateEnd = 0xDBFF;
- private static final int lowSurrogateStart = 0xDC00;
- private static final int lowSurrogateEnd = 0xDFFF;
-
- public Object clone ()
- {
- return new CharacterBreakIterator (this);
- }
-
- public CharacterBreakIterator ()
- {
- iter = null; // FIXME?
- }
-
- private CharacterBreakIterator (CharacterBreakIterator other)
- {
- iter = (CharacterIterator) other.iter.clone();
- }
-
- // Some methods to tell us different properties of characters.
- private final boolean isL (char c)
- {
- return c >= LBase && c <= LBase + LCount;
- }
- private final boolean isV (char c)
- {
- return c >= VBase && c <= VBase + VCount;
- }
- private final boolean isT (char c)
- {
- return c >= TBase && c <= TBase + TCount;
- }
- private final boolean isLVT (char c)
- {
- return isL (c) || isV (c) || isT (c);
- }
- private final boolean isHighSurrogate (char c)
- {
- return c >= highSurrogateStart && c <= highSurrogateEnd;
- }
- private final boolean isLowSurrogate (char c)
- {
- return c >= lowSurrogateStart && c <= lowSurrogateEnd;
- }
-
- public int next ()
- {
- int end = iter.getEndIndex();
- if (iter.getIndex() == end)
- return DONE;
-
- char c;
- for (char prev = CharacterIterator.DONE; iter.getIndex() < end; prev = c)
- {
- c = iter.next();
- if (c == CharacterIterator.DONE)
- break;
- int type = Character.getType(c);
-
- // Break after paragraph separators.
- if (type == Character.PARAGRAPH_SEPARATOR)
- break;
-
- // Now we need some lookahead.
- char ahead = iter.next();
- iter.previous();
- if (ahead == CharacterIterator.DONE)
- break;
- int aheadType = Character.getType(ahead);
-
- if (aheadType != Character.NON_SPACING_MARK
- && ! isLowSurrogate (ahead)
- && ! isLVT (ahead))
- break;
- if (! isLVT (c) && isLVT (ahead))
- break;
- if (isL (c) && ! isLVT (ahead)
- && aheadType != Character.NON_SPACING_MARK)
- break;
- if (isV (c) && ! isV (ahead) && !isT (ahead)
- && aheadType != Character.NON_SPACING_MARK)
- break;
- if (isT (c) && ! isT (ahead)
- && aheadType != Character.NON_SPACING_MARK)
- break;
-
- if (! isHighSurrogate (c) && isLowSurrogate (ahead))
- break;
- if (isHighSurrogate (c) && ! isLowSurrogate (ahead))
- break;
- if (! isHighSurrogate (prev) && isLowSurrogate (c))
- break;
- }
-
- return iter.getIndex();
- }
-
- public int previous ()
- {
- if (iter.getIndex() == iter.getBeginIndex())
- return DONE;
-
- int start = iter.getBeginIndex();
- while (iter.getIndex() >= iter.getBeginIndex())
- {
- char c = iter.previous();
- if (c == CharacterIterator.DONE)
- break;
- int type = Character.getType(c);
-
- if (type != Character.NON_SPACING_MARK
- && ! isLowSurrogate (c)
- && ! isLVT (c))
- break;
-
- // Now we need some lookahead.
- char ahead = iter.previous();
- if (ahead == CharacterIterator.DONE)
- {
- iter.next();
- break;
- }
- char ahead2 = iter.previous();
- iter.next();
- iter.next();
- if (ahead2 == CharacterIterator.DONE)
- break;
- int aheadType = Character.getType(ahead);
-
- if (aheadType == Character.PARAGRAPH_SEPARATOR)
- break;
-
- if (isLVT (c) && ! isLVT (ahead))
- break;
- if (! isLVT (c) && type != Character.NON_SPACING_MARK
- && isL (ahead))
- break;
- if (! isV (c) && ! isT (c) && type != Character.NON_SPACING_MARK
- && isV (ahead))
- break;
- if (! isT (c) && type != Character.NON_SPACING_MARK
- && isT (ahead))
- break;
-
- if (isLowSurrogate (c) && ! isHighSurrogate (ahead))
- break;
- if (! isLowSurrogate (c) && isHighSurrogate (ahead))
- break;
- if (isLowSurrogate (ahead) && ! isHighSurrogate (ahead2))
- break;
- }
-
- return iter.getIndex();
- }
-}
projects / msp430-gcc.git / blobdiff