1/* 2 * Copyright (c) 2004, 2013, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 * 25 * THIS FILE WAS MODIFIED BY SUN MICROSYSTEMS, INC. 26 */ 27 28package com.sun.xml.internal.fastinfoset.algorithm; 29 30import java.io.EOFException; 31import java.io.IOException; 32import java.io.InputStream; 33import java.io.OutputStream; 34import java.nio.CharBuffer; 35import java.util.ArrayList; 36import java.util.List; 37import com.sun.xml.internal.org.jvnet.fastinfoset.EncodingAlgorithmException; 38import com.sun.xml.internal.fastinfoset.CommonResourceBundle; 39 40 41 42public class FloatEncodingAlgorithm extends IEEE754FloatingPointEncodingAlgorithm { 43 44 public final int getPrimtiveLengthFromOctetLength(int octetLength) throws EncodingAlgorithmException { 45 if (octetLength % FLOAT_SIZE != 0) { 46 throw new EncodingAlgorithmException(CommonResourceBundle.getInstance(). 47 getString("message.lengthNotMultipleOfFloat", new Object[]{Integer.valueOf(FLOAT_SIZE)})); 48 } 49 50 return octetLength / FLOAT_SIZE; 51 } 52 53 public int getOctetLengthFromPrimitiveLength(int primitiveLength) { 54 return primitiveLength * FLOAT_SIZE; 55 } 56 57 public final Object decodeFromBytes(byte[] b, int start, int length) throws EncodingAlgorithmException { 58 float[] data = new float[getPrimtiveLengthFromOctetLength(length)]; 59 decodeFromBytesToFloatArray(data, 0, b, start, length); 60 61 return data; 62 } 63 64 public final Object decodeFromInputStream(InputStream s) throws IOException { 65 return decodeFromInputStreamToFloatArray(s); 66 } 67 68 69 public void encodeToOutputStream(Object data, OutputStream s) throws IOException { 70 if (!(data instanceof float[])) { 71 throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotFloat")); 72 } 73 74 final float[] fdata = (float[])data; 75 76 encodeToOutputStreamFromFloatArray(fdata, s); 77 } 78 79 public final Object convertFromCharacters(char[] ch, int start, int length) { 80 final CharBuffer cb = CharBuffer.wrap(ch, start, length); 81 final List floatList = new ArrayList(); 82 83 matchWhiteSpaceDelimnatedWords(cb, 84 new WordListener() { 85 public void word(int start, int end) { 86 String fStringValue = cb.subSequence(start, end).toString(); 87 floatList.add(Float.valueOf(fStringValue)); 88 } 89 } 90 ); 91 92 return generateArrayFromList(floatList); 93 } 94 95 public final void convertToCharacters(Object data, StringBuffer s) { 96 if (!(data instanceof float[])) { 97 throw new IllegalArgumentException(CommonResourceBundle.getInstance().getString("message.dataNotFloat")); 98 } 99 100 final float[] fdata = (float[])data; 101 102 convertToCharactersFromFloatArray(fdata, s); 103 } 104 105 106 public final void decodeFromBytesToFloatArray(float[] data, int fstart, byte[] b, int start, int length) { 107 final int size = length / FLOAT_SIZE; 108 for (int i = 0; i < size; i++) { 109 final int bits = ((b[start++] & 0xFF) << 24) | 110 ((b[start++] & 0xFF) << 16) | 111 ((b[start++] & 0xFF) << 8) | 112 (b[start++] & 0xFF); 113 data[fstart++] = Float.intBitsToFloat(bits); 114 } 115 } 116 117 public final float[] decodeFromInputStreamToFloatArray(InputStream s) throws IOException { 118 final List floatList = new ArrayList(); 119 final byte[] b = new byte[FLOAT_SIZE]; 120 121 while (true) { 122 int n = s.read(b); 123 if (n != 4) { 124 if (n == -1) { 125 break; 126 } 127 128 while(n != 4) { 129 final int m = s.read(b, n, FLOAT_SIZE - n); 130 if (m == -1) { 131 throw new EOFException(); 132 } 133 n += m; 134 } 135 } 136 137 final int bits = ((b[0] & 0xFF) << 24) | 138 ((b[1] & 0xFF) << 16) | 139 ((b[2] & 0xFF) << 8) | 140 (b[3] & 0xFF); 141 floatList.add(Float.valueOf(Float.intBitsToFloat(bits))); 142 } 143 144 return generateArrayFromList(floatList); 145 } 146 147 148 public final void encodeToOutputStreamFromFloatArray(float[] fdata, OutputStream s) throws IOException { 149 for (int i = 0; i < fdata.length; i++) { 150 final int bits = Float.floatToIntBits(fdata[i]); 151 s.write((bits >>> 24) & 0xFF); 152 s.write((bits >>> 16) & 0xFF); 153 s.write((bits >>> 8) & 0xFF); 154 s.write(bits & 0xFF); 155 } 156 } 157 158 public final void encodeToBytes(Object array, int astart, int alength, byte[] b, int start) { 159 encodeToBytesFromFloatArray((float[])array, astart, alength, b, start); 160 } 161 162 public final void encodeToBytesFromFloatArray(float[] fdata, int fstart, int flength, byte[] b, int start) { 163 final int fend = fstart + flength; 164 for (int i = fstart; i < fend; i++) { 165 final int bits = Float.floatToIntBits(fdata[i]); 166 b[start++] = (byte)((bits >>> 24) & 0xFF); 167 b[start++] = (byte)((bits >>> 16) & 0xFF); 168 b[start++] = (byte)((bits >>> 8) & 0xFF); 169 b[start++] = (byte)(bits & 0xFF); 170 } 171 } 172 173 174 public final void convertToCharactersFromFloatArray(float[] fdata, StringBuffer s) { 175 final int end = fdata.length - 1; 176 for (int i = 0; i <= end; i++) { 177 s.append(Float.toString(fdata[i])); 178 if (i != end) { 179 s.append(' '); 180 } 181 } 182 } 183 184 185 public final float[] generateArrayFromList(List array) { 186 float[] fdata = new float[array.size()]; 187 for (int i = 0; i < fdata.length; i++) { 188 fdata[i] = ((Float)array.get(i)).floatValue(); 189 } 190 191 return fdata; 192 } 193 194} 195