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annotate app/src/main/java/ch/ethz/ssh2/packets/TypesWriter.java @ 438:d29cce60f393

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migrate from Eclipse to Android Studio
author Carl Byington <carl@five-ten-sg.com>
date Thu, 03 Dec 2015 11:23:55 -0800
parents src/ch/ethz/ssh2/packets/TypesWriter.java@071eccdff8ea
children
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1 /*
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2 * Copyright (c) 2006-2011 Christian Plattner. All rights reserved.
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3 * Please refer to the LICENSE.txt for licensing details.
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4 */
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5 package ch.ethz.ssh2.packets;
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6
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7 import java.io.UnsupportedEncodingException;
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8 import java.math.BigInteger;
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9
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10 import ch.ethz.ssh2.util.StringEncoder;
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11
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12 /**
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13 * @author Christian Plattner
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14 * @version $Id: TypesWriter.java 160 2014-05-01 14:30:26Z dkocher@sudo.ch $
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15 */
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16 public final class TypesWriter {
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17 byte arr[];
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18 int pos;
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19
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20 public TypesWriter() {
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21 arr = new byte[256];
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22 pos = 0;
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23 }
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24
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25 private void resize(int len) {
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26 byte new_arr[] = new byte[len];
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27 System.arraycopy(arr, 0, new_arr, 0, arr.length);
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28 arr = new_arr;
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29 }
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30
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31 public int length() {
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32 return pos;
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33 }
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34
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35 public byte[] getBytes() {
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36 byte[] dst = new byte[pos];
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37 System.arraycopy(arr, 0, dst, 0, pos);
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38 return dst;
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39 }
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40
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41 public void getBytes(byte dst[]) {
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42 System.arraycopy(arr, 0, dst, 0, pos);
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43 }
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44
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45 public void writeUINT32(int val, int off) {
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46 if ((off + 4) > arr.length) {
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47 resize(off + 32);
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48 }
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49
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50 arr[off++] = (byte)(val >> 24);
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51 arr[off++] = (byte)(val >> 16);
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52 arr[off++] = (byte)(val >> 8);
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53 arr[off++] = (byte) val;
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54 }
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55
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56 public void writeUINT32(int val) {
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57 writeUINT32(val, pos);
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58 pos += 4;
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59 }
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60
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61 public void writeUINT64(long val) {
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62 if ((pos + 8) > arr.length) {
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63 resize(arr.length + 32);
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64 }
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65
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66 arr[pos++] = (byte)(val >> 56);
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67 arr[pos++] = (byte)(val >> 48);
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68 arr[pos++] = (byte)(val >> 40);
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69 arr[pos++] = (byte)(val >> 32);
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70 arr[pos++] = (byte)(val >> 24);
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71 arr[pos++] = (byte)(val >> 16);
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72 arr[pos++] = (byte)(val >> 8);
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73 arr[pos++] = (byte) val;
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74 }
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75
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76 public void writeBoolean(boolean v) {
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77 if ((pos + 1) > arr.length) {
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78 resize(arr.length + 32);
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79 }
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80
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81 arr[pos++] = v ? (byte) 1 : (byte) 0;
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82 }
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83
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84 public void writeByte(int v, int off) {
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85 if ((off + 1) > arr.length) {
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86 resize(off + 32);
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87 }
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88
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89 arr[off] = (byte) v;
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90 }
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91
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92 public void writeByte(int v) {
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93 writeByte(v, pos);
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94 pos++;
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95 }
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96
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97 public void writeMPInt(BigInteger b) {
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98 byte raw[] = b.toByteArray();
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99
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100 if ((raw.length == 1) && (raw[0] == 0)) {
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101 writeUINT32(0); /* String with zero bytes of data */
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102 }
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103 else {
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104 writeString(raw, 0, raw.length);
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105 }
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106 }
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107
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108 public void writeBytes(byte[] buff) {
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109 writeBytes(buff, 0, buff.length);
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110 }
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111
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112 public void writeBytes(byte[] buff, int off, int len) {
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113 if ((pos + len) > arr.length) {
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114 resize(arr.length + len + 32);
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115 }
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116
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117 System.arraycopy(buff, off, arr, pos, len);
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118 pos += len;
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119 }
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120
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121 public void writeString(byte[] buff, int off, int len) {
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122 writeUINT32(len);
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123 writeBytes(buff, off, len);
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124 }
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125
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126 public void writeString(String v) {
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127 byte[] b = StringEncoder.GetBytes(v);
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128 writeUINT32(b.length);
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129 writeBytes(b, 0, b.length);
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130 }
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131
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132 public void writeString(String v, String charsetName) throws UnsupportedEncodingException {
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133 byte[] b = (charsetName == null) ? StringEncoder.GetBytes(v) : v.getBytes(charsetName);
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134 writeUINT32(b.length);
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135 writeBytes(b, 0, b.length);
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136 }
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137
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138 public void writeNameList(String v[]) {
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139 StringBuilder sb = new StringBuilder();
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140
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141 for (int i = 0; i < v.length; i++) {
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142 if (i > 0) {
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143 sb.append(',');
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144 }
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145
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146 sb.append(v[i]);
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147 }
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148
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149 writeString(sb.toString());
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150 }
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151 }