Mercurial > hg > Members > kono > jpf-core

annotate src/classes/java/nio/ByteBuffer.java @ 0:61d41facf527

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initial v8 import (history reset)
author Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
date Fri, 23 Jan 2015 10:14:01 -0800
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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1 /*
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2 * Copyright (C) 2014, United States Government, as represented by the
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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3 * Administrator of the National Aeronautics and Space Administration.
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4 * All rights reserved.
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5 *
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6 * The Java Pathfinder core (jpf-core) platform is licensed under the
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7 * Apache License, Version 2.0 (the "License"); you may not use this file except
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8 * in compliance with the License. You may obtain a copy of the License at
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9 *
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10 * http://www.apache.org/licenses/LICENSE-2.0.
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11 *
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12 * Unless required by applicable law or agreed to in writing, software
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13 * distributed under the License is distributed on an "AS IS" BASIS,
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14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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15 * See the License for the specific language governing permissions and
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16 * limitations under the License.
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17 */
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18 package java.nio;
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19
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20 public class ByteBuffer extends Buffer {
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21 byte[] array;
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22
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23 public static ByteBuffer allocate(int i) {
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24 if (i < 0) {
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25 throw new IllegalArgumentException();
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26 }
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27 ByteBuffer newBuffer = new ByteBuffer(i);
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28 return newBuffer;
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29 }
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30
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31 public static ByteBuffer allocateDirect(int capacity) {
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32 return allocate(capacity);
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33 }
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34
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35 protected ByteBuffer(int i) {
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36 capacity = i;
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37 this.clear();
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38 array = new byte[i];
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39 }
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40
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41 public ByteBuffer duplicate() {
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42 ByteBuffer copy = new ByteBuffer(capacity);
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43 copy.array = array;
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44 return copy;
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45 }
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46
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47 public ByteBuffer asReadOnlyBuffer() {
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48 return duplicate();
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49 }
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50
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51 public ByteBuffer slice() {
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52 int remaining = limit - position;
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53 ByteBuffer copy = new ByteBuffer(remaining);
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54 copy.array = array;
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55 return copy;
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56 }
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57
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58 public ByteBuffer put(byte b) {
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59 if (position >= limit) {
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60 throw new BufferOverflowException();
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61 }
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62 array[position] = b;
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63 position++;
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64 return this;
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65 }
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66
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67 public ByteBuffer put(int i, byte b) {
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68 if ((i < 0) || (i >= limit)) {
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69 throw new IndexOutOfBoundsException();
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70 }
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71 array[i] = b;
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72 return this;
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73 }
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74
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75 public ByteBuffer put(ByteBuffer src) {
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76 if (src == this) {
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77 throw new IllegalArgumentException();
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78 }
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79
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80 int srcRemaining = src.remaining();
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81 if (srcRemaining > remaining()) {
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82 throw new BufferOverflowException();
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83 }
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84
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85 System.arraycopy(src.array, src.position(), array, position, srcRemaining);
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86
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87 src.position(src.position() + srcRemaining);
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88 position(position + srcRemaining);
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89
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90 return this;
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91 }
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92
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93 public ByteBuffer put(byte[] bytes, int offset, int length) {
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94 if ((offset | length | (offset + length) | (bytes.length - (offset + length))) < 0) {
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95 throw new IndexOutOfBoundsException();
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96 }
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97
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98 if (length > remaining()) {
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99 throw new BufferOverflowException();
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100 }
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101
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102 System.arraycopy(bytes, offset, array, position, length);
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103 position(position + length);
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104
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105 return this;
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106 }
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107
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108 public ByteBuffer put(byte[] bytes) {
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109 return put(bytes, 0, bytes.length);
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110 }
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111
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112 public byte get() {
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113 if (position >= limit) {
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114 throw new BufferUnderflowException();
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115 }
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116 position++;
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117 return array[position-1];
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118 }
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119
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120 public byte get(int i) {
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121 if ((i < 0) || (i >= limit)) {
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122 throw new IndexOutOfBoundsException();
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123 }
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124 return array[i];
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125 }
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126
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127 public ByteBuffer get(byte[] bytes) {
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128 return get(bytes, 0, bytes.length);
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129 }
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130
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131 public ByteBuffer get(byte[] bytes, int offset, int length) {
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132 if ((offset | length | (offset + length) | (bytes.length - (offset + length))) < 0) {
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133 throw new IndexOutOfBoundsException();
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134 }
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135
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136 if (length > remaining()) {
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137 throw new BufferUnderflowException();
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138 }
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139
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140 int end = offset + length;
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141 for (int i = offset; i < end; i++) {
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142 bytes[i] = get();
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143 }
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144 return this;
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145 }
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146
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147 public ByteBuffer order(ByteOrder order) {
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148 return this;
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149 }
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150
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parents:
diff changeset
151 /***************************************************************
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parents:
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152 * public char getChar()
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parents:
diff changeset
153 * @return 16 bit (UTF-16) char of ByteBuffer at this.position
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parents:
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154 * Caution: 8 or 32 bit character encodings are not supported.
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
155 */
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parents:
diff changeset
156 public char getChar() {
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parents:
diff changeset
157 char res=getChar(this.position);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
158 this.position+=2;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
159 return res;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
160 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
161
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parents:
diff changeset
162 /***************************************************************
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parents:
diff changeset
163 * public char getChar(int pos)
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parents:
diff changeset
164 * @return 16 bit (UTF-16) char of ByteBuffer at int pos
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parents:
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165 * Caution: 8 or 32 bit character encodings are not supported.
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
166 */
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parents:
diff changeset
167 public char getChar(int pos) {
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parents:
diff changeset
168 if (limit - pos < 2) {
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
169 throw new BufferUnderflowException();
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
170 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
171 int x1 = (array[pos] & 0xff) << 8;
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parents:
diff changeset
172 int x0 = (array[pos+1] & 0xff);
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parents:
diff changeset
173
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parents:
diff changeset
174 return (char) (x1 | x0);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
175 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
176
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
177 /***************************************************************
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parents:
diff changeset
178 * public ByteBuffer putChar(char c)
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diff changeset
179 * @return insert 16 bit (UTF-16) char c at this.position
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parents:
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180 * Caution: 8 or 32 bit character encodings are not supported.
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
181 */
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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diff changeset
182 public ByteBuffer putChar(char c) {
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parents:
diff changeset
183 if (limit - position < 2) {
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parents:
diff changeset
184 throw new BufferOverflowException();
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
185 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
186 array[position] = (byte)(c >> 8);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
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diff changeset
187 array[position+1] = (byte)(c );
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
188 position += 2;
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parents:
diff changeset
189
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parents:
diff changeset
190 return this;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
191 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
192
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
193 public int getInt() {
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parents:
diff changeset
194 if (limit - position < 4) {
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
195 throw new BufferUnderflowException();
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
196 }
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parents:
diff changeset
197
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diff changeset
198 int x3 = (array[position ] ) << 24;
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parents:
diff changeset
199 int x2 = (array[position+1] & 0xff) << 16;
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parents:
diff changeset
200 int x1 = (array[position+2] & 0xff) << 8;
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parents:
diff changeset
201 int x0 = (array[position+3] & 0xff);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
202 position += 4;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
203
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parents:
diff changeset
204 return (x3 | x2 | x1 | x0);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
205 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
206
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diff changeset
207 public ByteBuffer putInt(int x) {
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parents:
diff changeset
208 if (limit - position < 4) {
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
209 throw new BufferOverflowException();
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
210 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
211
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diff changeset
212 array[position ] = (byte)(x >> 24);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
213 array[position+1] = (byte)(x >> 16);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
214 array[position+2] = (byte)(x >> 8);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
215 array[position+3] = (byte)(x );
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
216 position += 4;
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parents:
diff changeset
217
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parents:
diff changeset
218 return this;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
219 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
220
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parents:
diff changeset
221 public long getLong() {
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diff changeset
222 if (limit - position < 8) {
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parents:
diff changeset
223 throw new BufferUnderflowException();
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
224 }
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parents:
diff changeset
225
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diff changeset
226 long x7 = ((long)(array[position ] ) << 56);
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diff changeset
227 long x6 = ((long)(array[position+1] & 0xff) << 48);
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diff changeset
228 long x5 = ((long)(array[position+2] & 0xff) << 40);
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diff changeset
229 long x4 = ((long)(array[position+3] & 0xff) << 32);
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parents:
diff changeset
230 long x3 = ((long)(array[position+4] & 0xff) << 24);
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parents:
diff changeset
231 long x2 = ((long)(array[position+5] & 0xff) << 16);
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parents:
diff changeset
232 long x1 = ((long)(array[position+6] & 0xff) << 8);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
233 long x0 = (array[position+7] & 0xff );
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
234 position += 8;
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parents:
diff changeset
235
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parents:
diff changeset
236 return (x7 | x6 | x5 | x4 | x3 | x2 | x1 | x0);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
237 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
238
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
239 public ByteBuffer putLong(long x) {
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parents:
diff changeset
240 if (limit - position < 8) {
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
241 throw new BufferOverflowException();
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
242 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
243
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
244 array[position ] = (byte)((x >> 56) );
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parents:
diff changeset
245 array[position+1] = (byte)((x >> 48) & 0xff);
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parents:
diff changeset
246 array[position+2] = (byte)((x >> 40) & 0xff);
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parents:
diff changeset
247 array[position+3] = (byte)((x >> 32) & 0xff);
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parents:
diff changeset
248 array[position+4] = (byte)((x >> 24) & 0xff);
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parents:
diff changeset
249 array[position+5] = (byte)((x >> 16) & 0xff);
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parents:
diff changeset
250 array[position+6] = (byte)((x >> 8) & 0xff);
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parents:
diff changeset
251 array[position+7] = (byte)((x ) & 0xff);
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parents:
diff changeset
252 position += 8;
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parents:
diff changeset
253
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parents:
diff changeset
254 return this;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
255 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
256
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
257 @Override
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parents:
diff changeset
258 public byte[] array() {
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parents:
diff changeset
259 return array;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
260 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
261
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
262 @Override
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
263 public boolean hasArray() {
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parents:
diff changeset
264 return true;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
265 }
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
266
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
267 public ByteBuffer compact() {
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
268 int pos = position();
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
269 int lim = limit();
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
270 int cap = capacity();
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
271 int rem = lim - pos;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
272
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
273 byte[] newArray = new byte[cap];
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
274 System.arraycopy(array, pos, newArray, 0, rem);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
275 array = newArray;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
276
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
277 position(rem);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
278 limit(cap);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
279 return this;
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
280 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
281
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
282 public static ByteBuffer wrap(byte[] outMess) {
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
283 ByteBuffer byteBuffer = new ByteBuffer(outMess.length);
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
284 byteBuffer.clear();
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
285 System.arraycopy(outMess, 0 , byteBuffer.array, 0, outMess.length);
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Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
286 return byteBuffer;
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
287 }
61d41facf527 initial v8 import (history reset)
Peter Mehlitz <Peter.C.Mehlitz@nasa.gov>
parents:
diff changeset
288 }