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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; |
12 |
| 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; |
27 |
| protected int maxNextCharInd = 0; |
28 |
| protected int inBuf = 0; |
29 |
| |
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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| |
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 |
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| System.arraycopy(buffer, 0, newbuffer,
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| bufsize - tokenBegin, bufpos); |
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| buffer = newbuffer;
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| |
42 |
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| System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin);
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43 |
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| System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos);
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44 |
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| bufline = newbufline;
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| |
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| System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
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47 |
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| System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos);
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48 |
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| bufcolumn = newbufcolumn;
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| |
50 |
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| maxNextCharInd = (bufpos += (bufsize - tokenBegin));
|
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| } else { |
52 |
0
| System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin);
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53 |
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| buffer = newbuffer;
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| |
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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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| |
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| System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin);
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59 |
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| bufcolumn = newbufcolumn;
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| |
61 |
0
| maxNextCharInd = (bufpos -= tokenBegin);
|
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| } |
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| } catch (Throwable t) { |
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| throw new Error(t.getMessage());
|
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| } |
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| |
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| |
68 |
0
| bufsize += 2048;
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69 |
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| available = bufsize;
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| 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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0
| bufpos = maxNextCharInd = 0;
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| available = tokenBegin;
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79 |
0
| } else if (tokenBegin < 0)
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| bufpos = maxNextCharInd = 0;
|
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| else |
82 |
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| ExpandBuff(false);
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83 |
0
| } else if (available > tokenBegin)
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0
| available = bufsize;
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85 |
0
| else if ((tokenBegin - available) < 2048)
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| ExpandBuff(true);
|
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| else |
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0
| available = tokenBegin;
|
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| } |
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| |
91 |
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| 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) { |
95 |
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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 |
98 |
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| maxNextCharInd += i;
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| return;
|
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| } catch (java.io.IOException e) { |
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0
| --bufpos;
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102 |
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| backup(0);
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103 |
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| if (tokenBegin == -1)
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104 |
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| tokenBegin = bufpos;
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| throw e;
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| } |
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| } |
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| |
109 |
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| public char BeginToken() throws java.io.IOException {
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110 |
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| tokenBegin = -1;
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111 |
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| char c = readChar();
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112 |
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| tokenBegin = bufpos;
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| |
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| 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 |
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| prevCharIsLF = false;
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122 |
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| line += (column = 1);
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123 |
0
| } else if (prevCharIsCR) {
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124 |
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| prevCharIsCR = false;
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125 |
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| if (c == '\n') {
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126 |
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| prevCharIsLF = true;
|
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| } else |
128 |
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| line += (column = 1);
|
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| } |
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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 |
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| break;
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135 |
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| 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 |
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| case '\t':
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139 |
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| column--;
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140 |
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| column += (8 - (column & 07));
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141 |
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| break;
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142 |
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| default :
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143 |
0
| break;
|
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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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| } |
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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 |
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| --inBuf;
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153 |
| |
154 |
0
| if (++bufpos == bufsize)
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155 |
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| bufpos = 0;
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| |
157 |
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| return buffer[bufpos];
|
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| } |
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| |
160 |
0
| if (++bufpos >= maxNextCharInd)
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161 |
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| FillBuff();
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| |
163 |
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| char c = buffer[bufpos];
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| |
165 |
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| UpdateLineColumn(c);
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166 |
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| return (c);
|
167 |
| } |
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| |
174 |
0
| public int getColumn() {
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175 |
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| return bufcolumn[bufpos];
|
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| } |
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| |
183 |
0
| public int getLine() {
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184 |
0
| return bufline[bufpos];
|
185 |
| } |
186 |
| |
187 |
0
| public int getEndColumn() {
|
188 |
0
| return bufcolumn[bufpos];
|
189 |
| } |
190 |
| |
191 |
0
| public int getEndLine() {
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192 |
0
| return bufline[bufpos];
|
193 |
| } |
194 |
| |
195 |
0
| public int getBeginColumn() {
|
196 |
0
| return bufcolumn[tokenBegin];
|
197 |
| } |
198 |
| |
199 |
0
| public int getBeginLine() {
|
200 |
0
| return bufline[tokenBegin];
|
201 |
| } |
202 |
| |
203 |
0
| public void backup(int amount) {
|
204 |
| |
205 |
0
| inBuf += amount;
|
206 |
0
| if ((bufpos -= amount) < 0)
|
207 |
0
| bufpos += bufsize;
|
208 |
| } |
209 |
| |
210 |
0
| public SimpleCharStream(java.io.Reader dstream, int startline,
|
211 |
| int startcolumn, int buffersize) { |
212 |
0
| inputStream = dstream;
|
213 |
0
| line = startline;
|
214 |
0
| column = startcolumn - 1;
|
215 |
| |
216 |
0
| available = bufsize = buffersize;
|
217 |
0
| buffer = new char[buffersize];
|
218 |
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| bufline = new int[buffersize];
|
219 |
0
| bufcolumn = new int[buffersize];
|
220 |
| } |
221 |
| |
222 |
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| public SimpleCharStream(java.io.Reader dstream, int startline,
|
223 |
| int startcolumn) { |
224 |
0
| this(dstream, startline, startcolumn, 4096);
|
225 |
| } |
226 |
| |
227 |
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| public SimpleCharStream(java.io.Reader dstream) {
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228 |
0
| this(dstream, 1, 1, 4096);
|
229 |
| } |
230 |
| |
231 |
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| public void ReInit(java.io.Reader dstream, int startline,
|
232 |
| int startcolumn, int buffersize) { |
233 |
0
| inputStream = dstream;
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234 |
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| line = startline;
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235 |
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| column = startcolumn - 1;
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236 |
| |
237 |
0
| if (buffer == null || buffersize != buffer.length) {
|
238 |
0
| available = bufsize = buffersize;
|
239 |
0
| buffer = new char[buffersize];
|
240 |
0
| bufline = new int[buffersize];
|
241 |
0
| bufcolumn = new int[buffersize];
|
242 |
| } |
243 |
0
| prevCharIsLF = prevCharIsCR = false;
|
244 |
0
| tokenBegin = inBuf = maxNextCharInd = 0;
|
245 |
0
| bufpos = -1;
|
246 |
| } |
247 |
| |
248 |
0
| public void ReInit(java.io.Reader dstream, int startline,
|
249 |
| int startcolumn) { |
250 |
0
| ReInit(dstream, startline, startcolumn, 4096);
|
251 |
| } |
252 |
| |
253 |
0
| public void ReInit(java.io.Reader dstream) {
|
254 |
0
| ReInit(dstream, 1, 1, 4096);
|
255 |
| } |
256 |
| |
257 |
0
| public SimpleCharStream(java.io.InputStream dstream, int startline,
|
258 |
| int startcolumn, int buffersize) { |
259 |
0
| this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
|
260 |
| } |
261 |
| |
262 |
0
| public SimpleCharStream(java.io.InputStream dstream, int startline,
|
263 |
| int startcolumn) { |
264 |
0
| this(dstream, startline, startcolumn, 4096);
|
265 |
| } |
266 |
| |
267 |
0
| public SimpleCharStream(java.io.InputStream dstream) {
|
268 |
0
| this(dstream, 1, 1, 4096);
|
269 |
| } |
270 |
| |
271 |
0
| public void ReInit(java.io.InputStream dstream, int startline,
|
272 |
| int startcolumn, int buffersize) { |
273 |
0
| ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
|
274 |
| } |
275 |
| |
276 |
0
| public void ReInit(java.io.InputStream dstream) {
|
277 |
0
| ReInit(dstream, 1, 1, 4096);
|
278 |
| } |
279 |
| |
280 |
0
| public void ReInit(java.io.InputStream dstream, int startline,
|
281 |
| int startcolumn) { |
282 |
0
| ReInit(dstream, startline, startcolumn, 4096);
|
283 |
| } |
284 |
| |
285 |
0
| public String GetImage() {
|
286 |
0
| if (bufpos >= tokenBegin)
|
287 |
0
| return new String(buffer, tokenBegin, bufpos - tokenBegin + 1);
|
288 |
| else |
289 |
0
| return new String(buffer, tokenBegin, bufsize - tokenBegin) +
|
290 |
| new String(buffer, 0, bufpos + 1); |
291 |
| } |
292 |
| |
293 |
0
| public char[] GetSuffix(int len) {
|
294 |
0
| char[] ret = new char[len];
|
295 |
| |
296 |
0
| if ((bufpos + 1) >= len)
|
297 |
0
| System.arraycopy(buffer, bufpos - len + 1, ret, 0, len);
|
298 |
| else { |
299 |
0
| System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0,
|
300 |
| len - bufpos - 1); |
301 |
0
| System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1);
|
302 |
| } |
303 |
| |
304 |
0
| return ret;
|
305 |
| } |
306 |
| |
307 |
0
| public void Done() {
|
308 |
0
| buffer = null;
|
309 |
0
| bufline = null;
|
310 |
0
| bufcolumn = null;
|
311 |
| } |
312 |
| |
313 |
| |
314 |
| |
315 |
| |
316 |
0
| public void adjustBeginLineColumn(int newLine, int newCol) {
|
317 |
0
| int start = tokenBegin;
|
318 |
0
| int len;
|
319 |
| |
320 |
0
| if (bufpos >= tokenBegin) {
|
321 |
0
| len = bufpos - tokenBegin + inBuf + 1;
|
322 |
| } else { |
323 |
0
| len = bufsize - tokenBegin + bufpos + 1 + inBuf;
|
324 |
| } |
325 |
| |
326 |
0
| int i = 0, j = 0, k = 0;
|
327 |
0
| int nextColDiff = 0, columnDiff = 0;
|
328 |
| |
329 |
0
| while (i < len &&
|
330 |
| bufline[j = start % bufsize] == bufline[k = ++start % bufsize]) { |
331 |
0
| bufline[j] = newLine;
|
332 |
0
| nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j];
|
333 |
0
| bufcolumn[j] = newCol + columnDiff;
|
334 |
0
| columnDiff = nextColDiff;
|
335 |
0
| i++;
|
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];
|
351 |
0
| column = bufcolumn[j];
|
352 |
| } |
353 |
| |
354 |
| } |