/* Copyright (c) 2001-2016, 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.
EOFException;
import java.io.
IOException;
import java.io.
Reader;
/**
* A writer for char strings.
*
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.4
* @since 1.9.0
*/
public class
CharArrayWriter {
protected char[]
buffer;
protected int
count;
public
CharArrayWriter(int
size) {
this.
buffer = new char[
size];
}
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(
count * 2);
}
}
}
public void
write(int
c) {
if (
count ==
buffer.length) {
ensureRoom(
count + 1);
}
buffer[
count++] = (char)
c;
}
public int
write(
Reader reader, int
length) throws
IOException {
int
left =
length;
while (
left > 0) {
int
read =
reader.
read(
buffer,
count,
left);
if (
read == -1) {
break;
}
left -=
read;
count +=
read;
}
return
length -
left;
}
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
newBuffer;
}
public char[]
getBuffer() {
return
buffer;
}
public int
size() {
return
count;
}
public void
setSize(int
newPos) {
if (
newPos >
buffer.length) {
throw new
ArrayIndexOutOfBoundsException();
}
count =
newPos;
}
/**
* Converts input data to a string.
* @return the string.
*/
public
String toString() {
return new
String(
buffer, 0,
count);
}
}