001    /*
002     * Copyright (c) 2005 Henri Sivonen
003     *
004     * Permission is hereby granted, free of charge, to any person obtaining a 
005     * copy of this software and associated documentation files (the "Software"), 
006     * to deal in the Software without restriction, including without limitation 
007     * the rights to use, copy, modify, merge, publish, distribute, sublicense, 
008     * and/or sell copies of the Software, and to permit persons to whom the 
009     * Software is furnished to do so, subject to the following conditions:
010     *
011     * The above copyright notice and this permission notice shall be included in 
012     * all copies or substantial portions of the Software.
013     *
014     * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 
015     * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
016     * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 
017     * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 
018     * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING 
019     * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER 
020     * DEALINGS IN THE SOFTWARE.
021     */
022    
023    package nu.validator.io;
024    
025    import java.io.IOException;
026    import java.io.InputStream;
027    import java.io.Reader;
028    import java.nio.charset.CharacterCodingException;
029    
030    /**
031     * @version $Id: NonBufferingAsciiInputStreamReader.java 9 2007-08-11 08:40:38Z hsivonen $
032     * @author hsivonen
033     */
034    public class NonBufferingAsciiInputStreamReader extends Reader {
035        private InputStream stream;
036        
037        /**
038         * @param arg0
039         */
040        public NonBufferingAsciiInputStreamReader(InputStream stream) {
041            this.stream = stream;
042        }
043        
044        /**
045         * @throws java.io.IOException
046         */
047        public void close() throws IOException {
048            stream.close();
049        }
050        /**
051         * @see java.io.Reader#read()
052         */
053        public int read() throws IOException {
054            int rv = stream.read();
055            if (rv < 0x80) {
056                return rv;
057            } else {
058                throw new CharacterCodingException();
059            }
060        }
061    
062        /**
063         * @see java.io.Reader#read(char[], int, int)
064         */
065        public int read(char[] buf, int off, int len) throws IOException {
066            int val = read();
067            if(val == -1) {
068                return -1;
069            } else {
070                buf[off] = (char) val;
071                return 1;
072            }
073        }
074    
075        
076        
077    }