| /* Copyright (c) 2001-2010, 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. |
| */ |
| |
| |
| package org.hsqldb.lib; |
| |
| import java.io.IOException; |
| import java.io.Reader; |
| import java.io.EOFException; |
| |
| /** |
| * A writer for char strings. |
| * |
| * @author Fred Toussi (fredt@users dot sourceforge.net) |
| * @version 1.9.0 |
| * @since 1.9.0 |
| */ |
| public class CharArrayWriter { |
| |
| protected char[] buffer; |
| protected int count; |
| |
| public CharArrayWriter(char[] buffer) { |
| this.buffer = buffer; |
| } |
| |
| public CharArrayWriter(Reader reader, int length) throws IOException { |
| |
| buffer = new char[length]; |
| |
| for (int left = length; left > 0; ) { |
| int read = reader.read(buffer, count, left); |
| |
| if (read == -1) { |
| if (left > 0) { |
| reader.close(); |
| |
| throw new EOFException(); |
| } |
| |
| break; |
| } |
| |
| left -= read; |
| count += read; |
| } |
| } |
| |
| public CharArrayWriter(Reader reader) throws IOException { |
| |
| buffer = new char[128]; |
| |
| for (;;) { |
| int read = reader.read(buffer, count, buffer.length - count); |
| |
| if (read == -1) { |
| break; |
| } |
| |
| count += read; |
| |
| if (count == buffer.length) { |
| ensureRoom(128); |
| } |
| } |
| } |
| |
| public void write(int c) { |
| |
| if (count == buffer.length) { |
| ensureRoom(count + 1); |
| } |
| |
| buffer[count++] = (char) c; |
| } |
| |
| void ensureRoom(int size) { |
| |
| if (size <= buffer.length) { |
| return; |
| } |
| |
| int newSize = buffer.length; |
| |
| while (newSize < size) { |
| newSize *= 2; |
| } |
| |
| char[] newBuffer = new char[newSize]; |
| |
| System.arraycopy(buffer, 0, newBuffer, 0, count); |
| |
| buffer = newBuffer; |
| } |
| |
| public void write(String str, int off, int len) { |
| |
| ensureRoom(count + len); |
| str.getChars(off, off + len, buffer, count); |
| |
| count += len; |
| } |
| |
| public void reset() { |
| count = 0; |
| } |
| |
| public void reset(char[] buffer) { |
| count = 0; |
| this.buffer = buffer; |
| } |
| |
| public char[] toCharArray() { |
| |
| char[] newBuffer = new char[count]; |
| |
| System.arraycopy(buffer, 0, newBuffer, 0, count); |
| |
| return (char[]) newBuffer; |
| } |
| |
| public int size() { |
| return count; |
| } |
| |
| /** |
| * Converts input data to a string. |
| * @return the string. |
| */ |
| public String toString() { |
| return new String(buffer, 0, count); |
| } |
| } |