Reformat code
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tarsin committed
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@@ -45,155 +45,155 @@ import java.nio.charset.Charset;
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* The default charset is US_ASCII.
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*/
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class StrictLineReader implements Closeable {
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private static final byte CR = (byte) '\r';
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private static final byte LF = (byte) '\n';
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private static final byte CR = (byte) '\r';
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private static final byte LF = (byte) '\n';
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private final InputStream in;
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private final Charset charset;
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private final InputStream in;
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private final Charset charset;
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/*
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* Buffered data is stored in {@code buf}. As long as no exception occurs, 0 <= pos <= end
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* and the data in the range [pos, end) is buffered for reading. At end of input, if there is
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* an unterminated line, we set end == -1, otherwise end == pos. If the underlying
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* {@code InputStream} throws an {@code IOException}, end may remain as either pos or -1.
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*/
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private byte[] buf;
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private int pos;
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private int end;
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/*
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* Buffered data is stored in {@code buf}. As long as no exception occurs, 0 <= pos <= end
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* and the data in the range [pos, end) is buffered for reading. At end of input, if there is
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* an unterminated line, we set end == -1, otherwise end == pos. If the underlying
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* {@code InputStream} throws an {@code IOException}, end may remain as either pos or -1.
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*/
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private byte[] buf;
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private int pos;
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private int end;
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/**
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* Constructs a new {@code LineReader} with the specified charset and the default capacity.
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*
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* @param in the {@code InputStream} to read data from.
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* @param charset the charset used to decode data. Only US-ASCII, UTF-8 and ISO-8859-1 are
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* supported.
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* @throws NullPointerException if {@code in} or {@code charset} is null.
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* @throws IllegalArgumentException if the specified charset is not supported.
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*/
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public StrictLineReader(InputStream in, Charset charset) {
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this(in, 8192, charset);
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}
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/**
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* Constructs a new {@code LineReader} with the specified capacity and charset.
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*
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* @param in the {@code InputStream} to read data from.
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* @param capacity the capacity of the buffer.
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* @param charset the charset used to decode data. Only US-ASCII, UTF-8 and ISO-8859-1 are
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* supported.
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* @throws NullPointerException if {@code in} or {@code charset} is null.
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* @throws IllegalArgumentException if {@code capacity} is negative or zero
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* or the specified charset is not supported.
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*/
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public StrictLineReader(InputStream in, int capacity, Charset charset) {
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if (in == null || charset == null) {
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throw new NullPointerException();
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}
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if (capacity < 0) {
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throw new IllegalArgumentException("capacity <= 0");
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}
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if (!(charset.equals(Util.US_ASCII))) {
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throw new IllegalArgumentException("Unsupported encoding");
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/**
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* Constructs a new {@code LineReader} with the specified charset and the default capacity.
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*
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* @param in the {@code InputStream} to read data from.
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* @param charset the charset used to decode data. Only US-ASCII, UTF-8 and ISO-8859-1 are
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* supported.
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* @throws NullPointerException if {@code in} or {@code charset} is null.
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* @throws IllegalArgumentException if the specified charset is not supported.
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*/
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public StrictLineReader(InputStream in, Charset charset) {
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this(in, 8192, charset);
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}
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this.in = in;
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this.charset = charset;
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buf = new byte[capacity];
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}
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/**
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* Closes the reader by closing the underlying {@code InputStream} and
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* marking this reader as closed.
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*
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* @throws IOException for errors when closing the underlying {@code InputStream}.
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*/
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public void close() throws IOException {
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synchronized (in) {
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if (buf != null) {
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buf = null;
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in.close();
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}
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}
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}
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/**
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* Reads the next line. A line ends with {@code "\n"} or {@code "\r\n"},
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* this end of line marker is not included in the result.
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*
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* @return the next line from the input.
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* @throws IOException for underlying {@code InputStream} errors.
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* @throws EOFException for the end of source stream.
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*/
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public String readLine() throws IOException {
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synchronized (in) {
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if (buf == null) {
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throw new IOException("LineReader is closed");
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}
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// Read more data if we are at the end of the buffered data.
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// Though it's an error to read after an exception, we will let {@code fillBuf()}
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// throw again if that happens; thus we need to handle end == -1 as well as end == pos.
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if (pos >= end) {
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fillBuf();
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}
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// Try to find LF in the buffered data and return the line if successful.
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for (int i = pos; i != end; ++i) {
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if (buf[i] == LF) {
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int lineEnd = (i != pos && buf[i - 1] == CR) ? i - 1 : i;
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String res = new String(buf, pos, lineEnd - pos, charset.name());
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pos = i + 1;
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return res;
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/**
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* Constructs a new {@code LineReader} with the specified capacity and charset.
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*
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* @param in the {@code InputStream} to read data from.
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* @param capacity the capacity of the buffer.
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* @param charset the charset used to decode data. Only US-ASCII, UTF-8 and ISO-8859-1 are
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* supported.
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* @throws NullPointerException if {@code in} or {@code charset} is null.
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* @throws IllegalArgumentException if {@code capacity} is negative or zero
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* or the specified charset is not supported.
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*/
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public StrictLineReader(InputStream in, int capacity, Charset charset) {
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if (in == null || charset == null) {
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throw new NullPointerException();
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}
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}
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// Let's anticipate up to 80 characters on top of those already read.
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ByteArrayOutputStream out = new ByteArrayOutputStream(end - pos + 80) {
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@NonNull
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@Override
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public String toString() {
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int length = (count > 0 && buf[count - 1] == CR) ? count - 1 : count;
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try {
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return new String(buf, 0, length, charset.name());
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} catch (UnsupportedEncodingException e) {
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throw new AssertionError(e); // Since we control the charset this will never happen.
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}
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if (capacity < 0) {
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throw new IllegalArgumentException("capacity <= 0");
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}
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if (!(charset.equals(Util.US_ASCII))) {
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throw new IllegalArgumentException("Unsupported encoding");
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}
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};
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while (true) {
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out.write(buf, pos, end - pos);
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// Mark unterminated line in case fillBuf throws EOFException or IOException.
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end = -1;
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fillBuf();
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// Try to find LF in the buffered data and return the line if successful.
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for (int i = pos; i != end; ++i) {
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if (buf[i] == LF) {
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if (i != pos) {
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out.write(buf, pos, i - pos);
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this.in = in;
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this.charset = charset;
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buf = new byte[capacity];
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}
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/**
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* Closes the reader by closing the underlying {@code InputStream} and
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* marking this reader as closed.
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*
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* @throws IOException for errors when closing the underlying {@code InputStream}.
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*/
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public void close() throws IOException {
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synchronized (in) {
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if (buf != null) {
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buf = null;
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in.close();
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}
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pos = i + 1;
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return out.toString();
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}
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}
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}
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}
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}
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public boolean hasUnterminatedLine() {
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return end == -1;
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}
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/**
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* Reads the next line. A line ends with {@code "\n"} or {@code "\r\n"},
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* this end of line marker is not included in the result.
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*
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* @return the next line from the input.
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* @throws IOException for underlying {@code InputStream} errors.
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* @throws EOFException for the end of source stream.
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*/
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public String readLine() throws IOException {
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synchronized (in) {
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if (buf == null) {
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throw new IOException("LineReader is closed");
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}
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/**
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* Reads new input data into the buffer. Call only with pos == end or end == -1,
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* depending on the desired outcome if the function throws.
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*/
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private void fillBuf() throws IOException {
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int result = in.read(buf, 0, buf.length);
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if (result == -1) {
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throw new EOFException();
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// Read more data if we are at the end of the buffered data.
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// Though it's an error to read after an exception, we will let {@code fillBuf()}
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// throw again if that happens; thus we need to handle end == -1 as well as end == pos.
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if (pos >= end) {
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fillBuf();
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}
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// Try to find LF in the buffered data and return the line if successful.
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for (int i = pos; i != end; ++i) {
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if (buf[i] == LF) {
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int lineEnd = (i != pos && buf[i - 1] == CR) ? i - 1 : i;
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String res = new String(buf, pos, lineEnd - pos, charset.name());
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pos = i + 1;
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return res;
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}
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}
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// Let's anticipate up to 80 characters on top of those already read.
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ByteArrayOutputStream out = new ByteArrayOutputStream(end - pos + 80) {
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@NonNull
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@Override
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public String toString() {
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int length = (count > 0 && buf[count - 1] == CR) ? count - 1 : count;
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try {
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return new String(buf, 0, length, charset.name());
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} catch (UnsupportedEncodingException e) {
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throw new AssertionError(e); // Since we control the charset this will never happen.
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}
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}
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};
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while (true) {
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out.write(buf, pos, end - pos);
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// Mark unterminated line in case fillBuf throws EOFException or IOException.
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end = -1;
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fillBuf();
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// Try to find LF in the buffered data and return the line if successful.
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for (int i = pos; i != end; ++i) {
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if (buf[i] == LF) {
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if (i != pos) {
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out.write(buf, pos, i - pos);
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}
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pos = i + 1;
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return out.toString();
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}
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}
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}
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}
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}
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public boolean hasUnterminatedLine() {
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return end == -1;
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}
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/**
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* Reads new input data into the buffer. Call only with pos == end or end == -1,
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* depending on the desired outcome if the function throws.
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*/
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private void fillBuf() throws IOException {
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int result = in.read(buf, 0, buf.length);
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if (result == -1) {
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throw new EOFException();
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}
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pos = 0;
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end = result;
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}
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pos = 0;
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end = result;
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}
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}
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