forked from mirrors/gecko-dev
151 lines
3.9 KiB
Java
151 lines
3.9 KiB
Java
/*
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* Copyright (c) 2008-2010 Mozilla Foundation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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package nu.validator.htmlparser.impl;
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import nu.validator.htmlparser.annotation.NoLength;
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/**
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* An UTF-16 buffer that knows the start and end indeces of its unconsumed
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* content.
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*
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* @version $Id$
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* @author hsivonen
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*/
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public final class UTF16Buffer {
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/**
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* The backing store of the buffer. May be larger than the logical content
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* of this <code>UTF16Buffer</code>.
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*/
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private final @NoLength char[] buffer;
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/**
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* The index of the first unconsumed character in the backing buffer.
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*/
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private int start;
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/**
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* The index of the slot immediately after the last character in the backing
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* buffer that is part of the logical content of this
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* <code>UTF16Buffer</code>.
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*/
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private int end;
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//[NOCPP[
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/**
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* Constructor for wrapping an existing UTF-16 code unit array.
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*
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* @param buffer
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* the backing buffer
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* @param start
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* the index of the first character to consume
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* @param end
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* the index immediately after the last character to consume
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*/
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public UTF16Buffer(@NoLength char[] buffer, int start, int end) {
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this.buffer = buffer;
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this.start = start;
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this.end = end;
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}
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// ]NOCPP]
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/**
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* Returns the start index.
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*
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* @return the start index
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*/
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public int getStart() {
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return start;
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}
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/**
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* Sets the start index.
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*
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* @param start
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* the start index
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*/
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public void setStart(int start) {
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this.start = start;
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}
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/**
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* Returns the backing buffer.
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*
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* @return the backing buffer
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*/
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public @NoLength char[] getBuffer() {
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return buffer;
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}
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/**
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* Returns the end index.
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*
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* @return the end index
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*/
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public int getEnd() {
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return end;
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}
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/**
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* Checks if the buffer has data left.
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*
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* @return <code>true</code> if there's data left
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*/
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public boolean hasMore() {
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return start < end;
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}
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/**
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* Returns <code>end - start</code>.
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*
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* @return <code>end - start</code>
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*/
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public int getLength() {
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return end - start;
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}
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/**
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* Adjusts the start index to skip over the first character if it is a line
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* feed and the previous character was a carriage return.
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*
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* @param lastWasCR
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* whether the previous character was a carriage return
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*/
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public void adjust(boolean lastWasCR) {
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if (lastWasCR && buffer[start] == '\n') {
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start++;
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}
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}
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/**
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* Sets the end index.
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*
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* @param end
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* the end index
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*/
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public void setEnd(int end) {
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this.end = end;
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}
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}
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