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/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
*
* Copyright (c) 2004, 2021 Oracle and/or its affiliates. All rights reserved.
*
* Oracle licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.sun.xml.fastinfoset.algorithm;
import java.io.EOFException;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.CharBuffer;
import java.util.ArrayList;
import java.util.List;
import org.jvnet.fastinfoset.EncodingAlgorithmException;
import com.sun.xml.fastinfoset.CommonResourceBundle;
public class FloatEncodingAlgorithm extends IEEE754FloatingPointEncodingAlgorithm {
@Override
public final int getPrimtiveLengthFromOctetLength(int octetLength) throws EncodingAlgorithmException {
if (octetLength % FLOAT_SIZE != 0) {
throw new EncodingAlgorithmException(CommonResourceBundle.getInstance().
getString("message.lengthNotMultipleOfFloat", new Object[]{FLOAT_SIZE}));
}
return octetLength / FLOAT_SIZE;
}
@Override
public int getOctetLengthFromPrimitiveLength(int primitiveLength) {
return primitiveLength * FLOAT_SIZE;
}
@Override
public final Object decodeFromBytes(byte[] b, int start, int length) throws EncodingAlgorithmException {
float[] data = new float[getPrimtiveLengthFromOctetLength(length)];
decodeFromBytesToFloatArray(data, 0, b, start, length);
return data;
}
@Override
public final Object decodeFromInputStream(InputStream s) throws IOException {
return decodeFromInputStreamToFloatArray(s);
}
@Override
public void encodeToOutputStream(Object data, OutputStream s) throws IOException {
if (!(data instanceof float[])) {
throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotFloat"));
}
final float[] fdata = (float[])data;
encodeToOutputStreamFromFloatArray(fdata, s);
}
@Override
public final Object convertFromCharacters(char[] ch, int start, int length) {
final CharBuffer cb = CharBuffer.wrap(ch, start, length);
final List floatList = new ArrayList<>();
matchWhiteSpaceDelimnatedWords(cb, (int start1, int end) -> {
String fStringValue = cb.subSequence(start1, end).toString();
floatList.add(Float.valueOf(fStringValue));
});
return generateArrayFromList(floatList);
}
@Override
public final void convertToCharacters(Object data, StringBuffer s) {
if (!(data instanceof float[])) {
throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotFloat"));
}
final float[] fdata = (float[])data;
convertToCharactersFromFloatArray(fdata, s);
}
public final void decodeFromBytesToFloatArray(float[] data, int fstart, byte[] b, int start, int length) {
final int size = length / FLOAT_SIZE;
for (int i = 0; i < size; i++) {
final int bits = ((b[start++] & 0xFF) << 24) |
((b[start++] & 0xFF) << 16) |
((b[start++] & 0xFF) << 8) |
(b[start++] & 0xFF);
data[fstart++] = Float.intBitsToFloat(bits);
}
}
public final float[] decodeFromInputStreamToFloatArray(InputStream s) throws IOException {
final List floatList = new ArrayList<>();
final byte[] b = new byte[FLOAT_SIZE];
while (true) {
int n = s.read(b);
if (n != 4) {
if (n == -1) {
break;
}
while(n != 4) {
final int m = s.read(b, n, FLOAT_SIZE - n);
if (m == -1) {
throw new EOFException();
}
n += m;
}
}
final int bits = ((b[0] & 0xFF) << 24) |
((b[1] & 0xFF) << 16) |
((b[2] & 0xFF) << 8) |
(b[3] & 0xFF);
floatList.add(Float.intBitsToFloat(bits));
}
return generateArrayFromList(floatList);
}
public final void encodeToOutputStreamFromFloatArray(float[] fdata, OutputStream s) throws IOException {
for (int i = 0; i < fdata.length; i++) {
final int bits = Float.floatToIntBits(fdata[i]);
s.write((bits >>> 24) & 0xFF);
s.write((bits >>> 16) & 0xFF);
s.write((bits >>> 8) & 0xFF);
s.write(bits & 0xFF);
}
}
@Override
public final void encodeToBytes(Object array, int astart, int alength, byte[] b, int start) {
encodeToBytesFromFloatArray((float[])array, astart, alength, b, start);
}
public final void encodeToBytesFromFloatArray(float[] fdata, int fstart, int flength, byte[] b, int start) {
final int fend = fstart + flength;
for (int i = fstart; i < fend; i++) {
final int bits = Float.floatToIntBits(fdata[i]);
b[start++] = (byte)((bits >>> 24) & 0xFF);
b[start++] = (byte)((bits >>> 16) & 0xFF);
b[start++] = (byte)((bits >>> 8) & 0xFF);
b[start++] = (byte)(bits & 0xFF);
}
}
public final void convertToCharactersFromFloatArray(float[] fdata, StringBuffer s) {
final int end = fdata.length - 1;
for (int i = 0; i <= end; i++) {
s.append(Float.toString(fdata[i]));
if (i != end) {
s.append(' ');
}
}
}
public final float[] generateArrayFromList(List array) {
float[] fdata = new float[array.size()];
for (int i = 0; i < fdata.length; i++) {
fdata[i] = (array.get(i));
}
return fdata;
}
}
