w3c.css.parser.analyzer.CommentSkipperInputStream Maven / Gradle / Ivy

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/*
 * Copyright (c) 2001 World Wide Web Consortium,
 * (Massachusetts Institute of Technology, Institut National de
 * Recherche en Informatique et en Automatique, Keio University). All
 * Rights Reserved. This program is distributed under the W3C's Software
 * Intellectual Property License. This program 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 W3C License http://www.w3.org/Consortium/Legal/ for more details.
 *
 * $Id$
 */
package org.w3c.css.parser.analyzer;

import java.io.IOException;
import java.io.InputStream;


/**
 * @author Philippe Le Hegaret
 * @version $Revision$
 */
public class CommentSkipperInputStream extends InputStream {

    int previous;
    InputStream in;

    /**
     * Creates a new CommentSkipperInputStream
     */
    public CommentSkipperInputStream(InputStream input) {
        in = input;
    }


    public int read() throws IOException {
        int c;
        if (previous != 0) {
            c = previous;
            previous = 0;
            return c;
        }

        c = in.read();

        if (c != '/') {
            return c;
        }
        previous = in.read();

        if (previous != '*') {
            return c;
        }
        previous = 0;
        do {
            do {
                c = in.read();
            } while ((c != -1) && (c != '*'));
            c = in.read();
        } while ((c != -1) && (c != '/'));
        if (c == '/') {
            return read();
        } else {
            return -1;
        }
    }

    public void close() throws IOException {
        in.close();
    }
}