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| package net.sourceforge.pmd.ast; |
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| public class SimpleCharStream { |
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| public static final boolean staticFlag = false; |
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| int bufsize; |
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| int available; |
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| int tokenBegin; |
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| public int bufpos = -1; |
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| protected int bufline[]; |
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| protected int bufcolumn[]; |
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| |
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| protected int column = 0; |
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| protected int line = 1; |
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| |
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| protected boolean prevCharIsCR = false; |
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| protected boolean prevCharIsLF = false; |
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| |
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| protected java.io.Reader inputStream; |
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| |
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| protected char[] buffer; |
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| protected int maxNextCharInd = 0; |
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28 |
| protected int inBuf = 0; |
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29 |
| |
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30 |
0
| protected void ExpandBuff(boolean wrapAround) {
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31 |
0
| char[] newbuffer = new char[bufsize + 2048];
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32 |
0
| int newbufline[] = new int[bufsize + 2048];
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33 |
0
| int newbufcolumn[] = new int[bufsize + 2048];
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| |
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35 |
0
| try {
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36 |
0
| if (wrapAround) {
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37 |
0
| System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
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38 |
0
| System.arraycopy(buffer, 0, newbuffer,
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| bufsize - tokenBegin, bufpos); |
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| buffer = newbuffer;
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42 |
0
| System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
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43 |
0
| System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos);
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44 |
0
| bufline = newbufline;
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| |
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46 |
0
| System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
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47 |
0
| System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos);
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48 |
0
| bufcolumn = newbufcolumn;
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| |
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50 |
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| maxNextCharInd = (bufpos += (bufsize - tokenBegin));
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| } else { |
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| System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
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53 |
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| buffer = newbuffer;
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| System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
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56 |
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| bufline = newbufline;
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| System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
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| bufcolumn = newbufcolumn;
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0
| maxNextCharInd = (bufpos -= tokenBegin);
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| } |
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| } catch (Throwable t) { |
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0
| throw new Error(t.getMessage());
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| } |
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0
| bufsize += 2048;
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0
| available = bufsize;
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70 |
0
| tokenBegin = 0;
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| } |
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| |
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0
| protected void FillBuff() throws java.io.IOException {
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74 |
0
| if (maxNextCharInd == available) {
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75 |
0
| if (available == bufsize) {
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76 |
0
| if (tokenBegin > 2048) {
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77 |
0
| bufpos = maxNextCharInd = 0;
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78 |
0
| available = tokenBegin;
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79 |
0
| } else if (tokenBegin < 0)
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80 |
0
| bufpos = maxNextCharInd = 0;
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81 |
| else |
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82 |
0
| ExpandBuff(false);
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83 |
0
| } else if (available > tokenBegin)
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84 |
0
| available = bufsize;
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85 |
0
| else if ((tokenBegin - available) < 2048)
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86 |
0
| ExpandBuff(true);
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| else |
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0
| available = tokenBegin;
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| } |
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| |
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91 |
0
| int i;
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92 |
0
| try {
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93 |
0
| if ((i = inputStream.read(buffer, maxNextCharInd,
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| available - maxNextCharInd)) == -1) { |
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| inputStream.close();
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96 |
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| throw new java.io.IOException();
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| } else |
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98 |
0
| maxNextCharInd += i;
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0
| return;
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100 |
| } catch (java.io.IOException e) { |
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101 |
0
| --bufpos;
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102 |
0
| backup(0);
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103 |
0
| if (tokenBegin == -1)
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104 |
0
| tokenBegin = bufpos;
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105 |
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| throw e;
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106 |
| } |
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107 |
| } |
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108 |
| |
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109 |
0
| public char BeginToken() throws java.io.IOException {
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110 |
0
| tokenBegin = -1;
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111 |
0
| char c = readChar();
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112 |
0
| tokenBegin = bufpos;
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114 |
0
| return c;
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| } |
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117 |
0
| protected void UpdateLineColumn(char c) {
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118 |
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| column++;
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120 |
0
| if (prevCharIsLF) {
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121 |
0
| prevCharIsLF = false;
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122 |
0
| line += (column = 1);
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123 |
0
| } else if (prevCharIsCR) {
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124 |
0
| prevCharIsCR = false;
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125 |
0
| if (c == '\n') {
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126 |
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| prevCharIsLF = true;
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127 |
| } else |
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128 |
0
| line += (column = 1);
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129 |
| } |
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131 |
0
| switch (c) {
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132 |
0
| case '\r':
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133 |
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| prevCharIsCR = true;
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134 |
0
| break;
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135 |
0
| case '\n':
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136 |
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| prevCharIsLF = true;
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137 |
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| break;
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138 |
0
| case '\t':
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139 |
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| column--;
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140 |
0
| column += (8 - (column & 07));
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141 |
0
| break;
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142 |
0
| default :
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143 |
0
| break;
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144 |
| } |
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| |
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146 |
0
| bufline[bufpos] = line;
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147 |
0
| bufcolumn[bufpos] = column;
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148 |
| } |
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149 |
| |
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150 |
0
| public char readChar() throws java.io.IOException {
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151 |
0
| if (inBuf > 0) {
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152 |
0
| --inBuf;
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153 |
| |
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154 |
0
| if (++bufpos == bufsize)
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155 |
0
| bufpos = 0;
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156 |
| |
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157 |
0
| return buffer[bufpos];
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158 |
| } |
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159 |
| |
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160 |
0
| if (++bufpos >= maxNextCharInd)
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161 |
0
| FillBuff();
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162 |
| |
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163 |
0
| char c = buffer[bufpos];
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164 |
| |
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165 |
0
| UpdateLineColumn(c);
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166 |
0
| return (c);
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167 |
| } |
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168 |
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169 |
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170 |
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171 |
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172 |
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173 |
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174 |
0
| public int getColumn() {
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175 |
0
| return bufcolumn[bufpos];
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176 |
| } |
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177 |
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178 |
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179 |
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180 |
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181 |
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182 |
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183 |
0
| public int getLine() {
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184 |
0
| return bufline[bufpos];
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185 |
| } |
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186 |
| |
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187 |
0
| public int getEndColumn() {
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188 |
0
| return bufcolumn[bufpos];
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189 |
| } |
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190 |
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191 |
0
| public int getEndLine() {
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192 |
0
| return bufline[bufpos];
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193 |
| } |
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194 |
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195 |
0
| public int getBeginColumn() {
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196 |
0
| return bufcolumn[tokenBegin];
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197 |
| } |
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198 |
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199 |
0
| public int getBeginLine() {
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200 |
0
| return bufline[tokenBegin];
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201 |
| } |
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202 |
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203 |
0
| public void backup(int amount) {
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204 |
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205 |
0
| inBuf += amount;
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206 |
0
| if ((bufpos -= amount) < 0)
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207 |
0
| bufpos += bufsize;
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208 |
| } |
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209 |
| |
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210 |
0
| public SimpleCharStream(java.io.Reader dstream, int startline,
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211 |
| int startcolumn, int buffersize) { |
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212 |
0
| inputStream = dstream;
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213 |
0
| line = startline;
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214 |
0
| column = startcolumn - 1;
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215 |
| |
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216 |
0
| available = bufsize = buffersize;
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217 |
0
| buffer = new char[buffersize];
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218 |
0
| bufline = new int[buffersize];
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219 |
0
| bufcolumn = new int[buffersize];
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220 |
| } |
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221 |
| |
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222 |
0
| public SimpleCharStream(java.io.Reader dstream, int startline,
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223 |
| int startcolumn) { |
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224 |
0
| this(dstream, startline, startcolumn, 4096);
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225 |
| } |
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226 |
| |
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227 |
0
| public SimpleCharStream(java.io.Reader dstream) {
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228 |
0
| this(dstream, 1, 1, 4096);
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229 |
| } |
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230 |
| |
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231 |
0
| public void ReInit(java.io.Reader dstream, int startline,
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232 |
| int startcolumn, int buffersize) { |
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233 |
0
| inputStream = dstream;
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234 |
0
| line = startline;
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235 |
0
| column = startcolumn - 1;
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236 |
| |
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237 |
0
| if (buffer == null || buffersize != buffer.length) {
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238 |
0
| available = bufsize = buffersize;
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239 |
0
| buffer = new char[buffersize];
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240 |
0
| bufline = new int[buffersize];
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241 |
0
| bufcolumn = new int[buffersize];
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242 |
| } |
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243 |
0
| prevCharIsLF = prevCharIsCR = false;
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244 |
0
| tokenBegin = inBuf = maxNextCharInd = 0;
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245 |
0
| bufpos = -1;
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246 |
| } |
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247 |
| |
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248 |
0
| public void ReInit(java.io.Reader dstream, int startline,
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249 |
| int startcolumn) { |
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250 |
0
| ReInit(dstream, startline, startcolumn, 4096);
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251 |
| } |
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252 |
| |
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253 |
0
| public void ReInit(java.io.Reader dstream) {
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254 |
0
| ReInit(dstream, 1, 1, 4096);
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255 |
| } |
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256 |
| |
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257 |
0
| public SimpleCharStream(java.io.InputStream dstream, int startline,
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258 |
| int startcolumn, int buffersize) { |
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259 |
0
| this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
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260 |
| } |
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261 |
| |
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262 |
0
| public SimpleCharStream(java.io.InputStream dstream, int startline,
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263 |
| int startcolumn) { |
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264 |
0
| this(dstream, startline, startcolumn, 4096);
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265 |
| } |
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266 |
| |
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267 |
0
| public SimpleCharStream(java.io.InputStream dstream) {
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268 |
0
| this(dstream, 1, 1, 4096);
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269 |
| } |
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270 |
| |
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271 |
0
| public void ReInit(java.io.InputStream dstream, int startline,
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272 |
| int startcolumn, int buffersize) { |
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273 |
0
| ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
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274 |
| } |
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275 |
| |
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276 |
0
| public void ReInit(java.io.InputStream dstream) {
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277 |
0
| ReInit(dstream, 1, 1, 4096);
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278 |
| } |
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279 |
| |
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280 |
0
| public void ReInit(java.io.InputStream dstream, int startline,
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281 |
| int startcolumn) { |
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282 |
0
| ReInit(dstream, startline, startcolumn, 4096);
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283 |
| } |
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284 |
| |
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285 |
0
| public String GetImage() {
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286 |
0
| if (bufpos >= tokenBegin)
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287 |
0
| return new String(buffer, tokenBegin, bufpos - tokenBegin + 1);
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288 |
| else |
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289 |
0
| return new String(buffer, tokenBegin, bufsize - tokenBegin) +
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290 |
| new String(buffer, 0, bufpos + 1); |
|
291 |
| } |
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292 |
| |
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293 |
0
| public char[] GetSuffix(int len) {
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294 |
0
| char[] ret = new char[len];
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295 |
| |
|
296 |
0
| if ((bufpos + 1) >= len)
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297 |
0
| System.arraycopy(buffer, bufpos - len + 1, ret, 0, len);
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298 |
| else { |
|
299 |
0
| System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0,
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|
300 |
| len - bufpos - 1); |
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301 |
0
| System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1);
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302 |
| } |
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303 |
| |
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304 |
0
| return ret;
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305 |
| } |
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306 |
| |
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307 |
0
| public void Done() {
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308 |
0
| buffer = null;
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309 |
0
| bufline = null;
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310 |
0
| bufcolumn = null;
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311 |
| } |
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312 |
| |
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313 |
| |
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314 |
| |
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315 |
| |
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316 |
0
| public void adjustBeginLineColumn(int newLine, int newCol) {
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317 |
0
| int start = tokenBegin;
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318 |
0
| int len;
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319 |
| |
|
320 |
0
| if (bufpos >= tokenBegin) {
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321 |
0
| len = bufpos - tokenBegin + inBuf + 1;
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|
322 |
| } else { |
|
323 |
0
| len = bufsize - tokenBegin + bufpos + 1 + inBuf;
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324 |
| } |
|
325 |
| |
|
326 |
0
| int i = 0, j = 0, k = 0;
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327 |
0
| int nextColDiff = 0, columnDiff = 0;
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328 |
| |
|
329 |
0
| while (i < len &&
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|
330 |
| bufline[j = start % bufsize] == bufline[k = ++start % bufsize]) { |
|
331 |
0
| bufline[j] = newLine;
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332 |
0
| nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j];
|
|
333 |
0
| bufcolumn[j] = newCol + columnDiff;
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|
334 |
0
| columnDiff = nextColDiff;
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|
335 |
0
| i++;
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|
336 |
| } |
|
337 |
| |
|
338 |
0
| if (i < len) {
|
|
339 |
0
| bufline[j] = newLine++;
|
|
340 |
0
| bufcolumn[j] = newCol + columnDiff;
|
|
341 |
| |
|
342 |
0
| while (i++ < len) {
|
|
343 |
0
| if (bufline[j = start % bufsize] != bufline[++start % bufsize])
|
|
344 |
0
| bufline[j] = newLine++;
|
|
345 |
| else |
|
346 |
0
| bufline[j] = newLine;
|
|
347 |
| } |
|
348 |
| } |
|
349 |
| |
|
350 |
0
| line = bufline[j];
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|
351 |
0
| column = bufcolumn[j];
|
|
352 |
| } |
|
353 |
| |
|
354 |
| } |