/* 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
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* 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;
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.hsqldb.persist;
import java.io.
IOException;
import org.hsqldb.error.
Error;
import org.hsqldb.error.
ErrorCode;
import org.hsqldb.rowio.
RowInputInterface;
import org.hsqldb.rowio.
RowInputText;
/**
* Reader for UTF-16 text files.
*
* @author Bob Preston (sqlbob@users dot sourceforge.net)
* @author Fred Toussi (fredt@users dot sourceforge.net)
* @version 2.3.4
* @since 2.3.4
*/
public class
TextFileReader16 extends
TextFileReader8
implements
TextFileReader {
TextFileReader16(
RandomAccessInterface dataFile,
TextFileSettings textFileSettings,
RowInputInterface rowIn, boolean
isReadOnly) {
super();
this.
dataFile =
dataFile;
this.
textFileSettings =
textFileSettings;
this.
rowIn =
rowIn;
this.
buffer =
StringCreator.
getStringCreator(char.class,
textFileSettings.
charEncoding);
skipBOM();
}
private void
skipBOM() {
try {
if (
textFileSettings.
isUTF16) {
dataFile.
seek(0);
if (
dataFile.
read() == 0xFE &&
dataFile.
read() == 0xFF) {
position = 2;
} else {
dataFile.
seek(0);
if (
dataFile.
read() == 0xFF &&
dataFile.
read() == 0xFE) {
position = 2;
textFileSettings.
setLittleEndianByteOrderMark();
}
}
}
} catch (
IOException e) {
throw
Error.
error(
ErrorCode.
TEXT_FILE_IO,
e);
}
}
int
getByteSizeForChar() {
return 2;
}
int
readChar() {
try {
int
c1 =
dataFile.
read();
if (
c1 == -1) {
return -1;
}
int
c2 =
dataFile.
read();
if (
c2 == -1) {
return -1;
}
if (
textFileSettings.
isLittleEndian) {
int
temp =
c1;
c1 =
c2;
c2 =
temp;
}
return (char) ((
c1 << 8) +
c2);
} catch (
IOException e) {
throw
Error.
error(
ErrorCode.
TEXT_FILE_IO,
e);
}
}
public
String getHeaderLine() {
return
header;
}
public long
getLineNumber() {
return ((
RowInputText)
rowIn).
getLineNumber();
}
}