com.oracle.truffle.regex.charset.CodePointSetAccumulator Maven / Gradle / Ivy

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/*
 * Copyright (c) 2018, 2020, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
 *
 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
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 * This license is subject to the following condition:
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 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
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 * SOFTWARE.
 */
package com.oracle.truffle.regex.charset;

import java.util.Iterator;

import com.oracle.truffle.regex.tregex.buffer.IntRangesBuffer;

public class CodePointSetAccumulator implements Iterable {

    private IntRangesBuffer acc = new IntRangesBuffer();
    private IntRangesBuffer tmp;

    public CodePointSetAccumulator() {
    }

    public IntRangesBuffer get() {
        return acc;
    }

    public IntRangesBuffer getTmp() {
        if (tmp == null) {
            tmp = new IntRangesBuffer();
        }
        return tmp;
    }

    public void addRange(int lo, int hi) {
        acc.addRange(lo, hi);
    }

    public void appendRange(Range r) {
        appendRange(r.lo, r.hi);
    }

    public void appendRange(int lo, int hi) {
        acc.appendRange(lo, hi);
    }

    public void addSet(CodePointSet set) {
        IntRangesBuffer t = getTmp();
        tmp = acc;
        acc = t;
        SortedListOfRanges.union(tmp, set, acc);
    }

    public void clear() {
        acc.clear();
    }

    public boolean isEmpty() {
        return acc.isEmpty();
    }

    public boolean matchesSingleChar() {
        return acc.matchesSingleChar();
    }

    public void copyTo(CodePointSetAccumulator other) {
        other.clear();
        acc.appendRangesTo(other.acc, 0, acc.size());
    }

    public CodePointSet toCodePointSet() {
        return CodePointSet.create(acc);
    }

    @Override
    public Iterator iterator() {
        return acc.rangesIterator();
    }
}