Mercurial > hg > blitz_stable

annotate src/com/go/trove/io/DefaultByteBuffer.java @ 27:511648fa4d64 Version 2.1

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Version to 2.1
author Dan Creswell <dan.creswell@gmail.com>
date Mon, 04 Jan 2010 13:00:40 +0000
parents 3dc0c5604566
children
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1 /* ====================================================================
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2 * Trove - Copyright (c) 1999-2000 Walt Disney Internet Group
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3 * ====================================================================
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4 * The Tea Software License, Version 1.1
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5 *
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6 * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved.
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions
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10 * are met:
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11 *
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12 * 1. Redistributions of source code must retain the above copyright
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13 * notice, this list of conditions and the following disclaimer.
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14 *
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15 * 2. Redistributions in binary form must reproduce the above copyright
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16 * notice, this list of conditions and the following disclaimer in
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17 * the documentation and/or other materials provided with the
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18 * distribution.
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19 *
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20 * 3. The end-user documentation included with the redistribution,
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21 * if any, must include the following acknowledgment:
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22 * "This product includes software developed by the
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23 * Walt Disney Internet Group (http://opensource.go.com/)."
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24 * Alternately, this acknowledgment may appear in the software itself,
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25 * if and wherever such third-party acknowledgments normally appear.
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26 *
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27 * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must
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28 * not be used to endorse or promote products derived from this
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29 * software without prior written permission. For written
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30 * permission, please contact opensource@dig.com.
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31 *
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32 * 5. Products derived from this software may not be called "Tea",
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33 * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet",
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34 * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior
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35 * written permission of the Walt Disney Internet Group.
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36 *
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37 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
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38 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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39 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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40 * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS
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41 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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42 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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43 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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44 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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45 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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46 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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47 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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48 * ====================================================================
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49 *
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50 * For more information about Tea, please see http://opensource.go.com/.
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51 */
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52
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53 package com.go.trove.io;
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54
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55 import java.io.OutputStream;
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56 import java.io.IOException;
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57 import java.io.Serializable;
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58 import java.util.List;
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59 import java.util.ArrayList;
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60
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61 /******************************************************************************
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62 * A ByteBuffer implementation that keeps byte data in memory.
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63 *
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64 * @author Brian S O'Neill
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65 * @version
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66 * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 01/05/30 <!-- $-->
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67 */
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68 public class DefaultByteBuffer implements ByteBuffer, Serializable {
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69 private static final int BUFFER_SIZE = 512;
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70
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71 // A List of ByteData instances.
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72 private List mChunks;
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73
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74 private byte[] mBuffer;
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75 private int mCursor;
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76
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77 private int mBaseCount;
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78
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79 private List mCaptureBuffers;
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80
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81 public DefaultByteBuffer() {
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82 mChunks = new ArrayList(100);
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83 }
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84
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85 public long getBaseByteCount() {
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86 if (mBuffer != null) {
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87 return mBaseCount + mCursor;
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88 }
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89 else {
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90 return mBaseCount;
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91 }
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92 }
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93
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94 public long getByteCount() throws IOException {
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95 long count;
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96 if (mBuffer != null) {
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97 count = mCursor;
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98 }
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99 else {
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100 count = 0;
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101 }
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102
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103 int size = mChunks.size();
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104 for (int i=0; i<size; i++) {
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105 count += ((ByteData)mChunks.get(i)).getByteCount();
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106 }
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107
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108 return count;
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109 }
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110
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111 public void writeTo(OutputStream out) throws IOException {
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112 int size = mChunks.size();
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113 for (int i=0; i<size; i++) {
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114 ((ByteData)mChunks.get(i)).writeTo(out);
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115 }
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116
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117 if (mBuffer != null && mCursor != 0) {
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118 out.write(mBuffer, 0, mCursor);
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119 }
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120 }
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121
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122 public void append(byte b) throws IOException {
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123 List captureBuffers;
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124 if ((captureBuffers = mCaptureBuffers) != null) {
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125 int size = captureBuffers.size();
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126 for (int i=0; i<size; i++) {
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127 ((ByteBuffer)captureBuffers.get(i)).append(b);
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128 }
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129 }
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130
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131 if (mBuffer == null) {
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132 mBuffer = new byte[BUFFER_SIZE];
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133 mCursor = 0;
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Dan Creswell <dan.creswell@gmail.com>
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134 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
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135 else if (mCursor >= mBuffer.length) {
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136 mChunks.add(new ArrayByteData(mBuffer));
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137 mBaseCount += BUFFER_SIZE;
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Dan Creswell <dan.creswell@gmail.com>
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138 mBuffer = new byte[BUFFER_SIZE];
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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139 mCursor = 0;
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Dan Creswell <dan.creswell@gmail.com>
parents:
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140 }
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Dan Creswell <dan.creswell@gmail.com>
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141
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Dan Creswell <dan.creswell@gmail.com>
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142 mBuffer[mCursor++] = b;
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Dan Creswell <dan.creswell@gmail.com>
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143 }
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Dan Creswell <dan.creswell@gmail.com>
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144
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Dan Creswell <dan.creswell@gmail.com>
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145 public void append(byte[] bytes) throws IOException {
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Dan Creswell <dan.creswell@gmail.com>
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146 append(bytes, 0, bytes.length);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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147 }
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Dan Creswell <dan.creswell@gmail.com>
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148
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149 public void append(byte[] bytes, int offset, int length)
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150 throws IOException
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Dan Creswell <dan.creswell@gmail.com>
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151 {
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Dan Creswell <dan.creswell@gmail.com>
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152 List captureBuffers;
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Dan Creswell <dan.creswell@gmail.com>
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153 if ((captureBuffers = mCaptureBuffers) != null) {
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154 int size = captureBuffers.size();
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Dan Creswell <dan.creswell@gmail.com>
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155 for (int i=0; i<size; i++) {
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156 ((ByteBuffer)captureBuffers.get(i)).append
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157 (bytes, offset, length);
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Dan Creswell <dan.creswell@gmail.com>
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158 }
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Dan Creswell <dan.creswell@gmail.com>
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159 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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160
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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161 while (length > 0) {
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162 if (mBuffer == null) {
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Dan Creswell <dan.creswell@gmail.com>
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163 if (length >= BUFFER_SIZE) {
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Dan Creswell <dan.creswell@gmail.com>
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164 byte[] copy = new byte[length];
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Dan Creswell <dan.creswell@gmail.com>
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165 System.arraycopy(bytes, offset, copy, 0, length);
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166 mChunks.add(new ArrayByteData(copy));
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167 mBaseCount += length;
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Dan Creswell <dan.creswell@gmail.com>
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168 return;
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Dan Creswell <dan.creswell@gmail.com>
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169 }
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Dan Creswell <dan.creswell@gmail.com>
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170
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171 mBuffer = new byte[BUFFER_SIZE];
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Dan Creswell <dan.creswell@gmail.com>
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172 mCursor = 0;
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Dan Creswell <dan.creswell@gmail.com>
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173 }
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Dan Creswell <dan.creswell@gmail.com>
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174
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175 int available = BUFFER_SIZE - mCursor;
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176
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177 if (length <= available) {
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178 System.arraycopy(bytes, offset, mBuffer, mCursor, length);
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179 mCursor += length;
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Dan Creswell <dan.creswell@gmail.com>
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180 return;
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Dan Creswell <dan.creswell@gmail.com>
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181 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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182
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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183 System.arraycopy(bytes, offset, mBuffer, mCursor, available);
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184 mChunks.add(new ArrayByteData(mBuffer));
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185 mBaseCount += BUFFER_SIZE;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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186 mBuffer = null;
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Dan Creswell <dan.creswell@gmail.com>
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187 offset += available;
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Dan Creswell <dan.creswell@gmail.com>
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188 length -= available;
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Dan Creswell <dan.creswell@gmail.com>
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189 }
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Dan Creswell <dan.creswell@gmail.com>
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190 }
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Dan Creswell <dan.creswell@gmail.com>
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191
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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192 public void appendSurrogate(ByteData s) throws IOException {
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193 if (s == null) {
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Dan Creswell <dan.creswell@gmail.com>
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194 return;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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195 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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196
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197 List captureBuffers;
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198 if ((captureBuffers = mCaptureBuffers) != null) {
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199 int size = captureBuffers.size();
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200 for (int i=0; i<size; i++) {
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201 ((ByteBuffer)captureBuffers.get(i)).appendSurrogate(s);
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202 }
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Dan Creswell <dan.creswell@gmail.com>
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203 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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204
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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205 if (mBuffer != null && mCursor > 0) {
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206 mChunks.add(new ArrayByteData(mBuffer, 0, mCursor));
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207 mBaseCount += mCursor;
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Dan Creswell <dan.creswell@gmail.com>
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208 mBuffer = null;
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Dan Creswell <dan.creswell@gmail.com>
parents:
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209 }
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Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
210 mChunks.add(s);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
211 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
212
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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diff changeset
213 public void addCaptureBuffer(ByteBuffer buffer) {
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214 List captureBuffers;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
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diff changeset
215 if ((captureBuffers = mCaptureBuffers) == null) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
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parents:
diff changeset
216 captureBuffers = mCaptureBuffers = new ArrayList();
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Dan Creswell <dan.creswell@gmail.com>
parents:
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217 }
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Dan Creswell <dan.creswell@gmail.com>
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diff changeset
218 captureBuffers.add(buffer);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
219 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
220
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
221 public void removeCaptureBuffer(ByteBuffer buffer) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
222 List captureBuffers;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
223 if ((captureBuffers = mCaptureBuffers) != null) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
224 captureBuffers.remove(buffer);
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
225 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
226 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
227
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
228 public void reset() throws IOException {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
229 int size = mChunks.size();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
230 for (int i=0; i<size; i++) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
231 ((ByteData)mChunks.get(i)).reset();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
232 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
233
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
234 List captureBuffers;
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
235 if ((captureBuffers = mCaptureBuffers) != null) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
236 size = captureBuffers.size();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
237 for (int i=0; i<size; i++) {
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
238 ((ByteData)captureBuffers.get(i)).reset();
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
239 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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240 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
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241 }
3dc0c5604566 Initial checkin of blitz 2.0 fcs - no installer yet.
Dan Creswell <dan.creswell@gmail.com>
parents:
diff changeset
242 }