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/* Copyright (c) 2001-2009, The HSQL Development Group
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
*
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* Neither the name of the HSQL Development Group nor the names of its
* contributors may be used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL HSQL DEVELOPMENT GROUP, HSQLDB.ORG,
* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
import java.io.DataInput;
import java.io.EOFException;
import java.io.IOException;
import java.io.Reader;
/**
* This class is an part implementation of DataInput. It wraps a Reader object.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 1.9.0
* @since 1.9.0
*/
public class ReaderDataInput implements DataInput {
protected Reader reader;
protected int pos;
int lastChar = -1;
public ReaderDataInput(Reader reader) {
this.reader = reader;
this.pos = 0;
}
// methods that implement java.io.DataInput
public final void readFully(byte[] b) throws IOException {
readFully(b, 0, b.length);
}
public final void readFully(byte[] bytes, int off,
int len) throws IOException {
if (len < 0) {
throw new IndexOutOfBoundsException();
}
int n = 0;
while (n < len) {
int b = read();
if (b < 0) {
throw new EOFException();
}
bytes[off + n++] = (byte) b;
}
}
public final boolean readBoolean() throws IOException {
int b = read();
if (b < 0) {
throw new EOFException();
}
return (b != 0);
}
public final byte readByte() throws IOException {
int b = read();
if (b < 0) {
throw new EOFException();
}
return (byte) b;
}
public final int readUnsignedByte() throws IOException {
int b = read();
if (b < 0) {
throw new EOFException();
}
return b;
}
public short readShort() throws IOException {
int b1 = read();
if (b1 < 0) {
throw new EOFException();
}
int b2 = read();
if (b2 < 0) {
throw new EOFException();
}
return (short) ((b1 << 8) | b2);
}
public final int readUnsignedShort() throws IOException {
int b1 = read();
int b2 = read();
if ((b1 | b2) < 0) {
throw new EOFException();
}
return ((b1 << 8) + (b2));
}
public final char readChar() throws IOException {
int b1 = read();
int b2 = read();
if ((b1 | b2) < 0) {
throw new EOFException();
}
return (char) ((b1 << 8) + (b2));
}
public int readInt() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public long readLong() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public final float readFloat() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public final double readDouble() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public int skipBytes(int n) throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public String readLine() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public String readUTF() throws IOException {
throw new java.lang.RuntimeException("not implemented.");
}
public int read() throws IOException {
if (lastChar >= 0) {
int val = lastChar & 0xff;
lastChar = -1;
pos++;
return val;
}
lastChar = reader.read();
if (lastChar < 0) {
return lastChar;
}
pos++;
return lastChar >> 8;
}
}
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