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package org.apache.commons.configuration.plist; |
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class SimpleCharStream |
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{ |
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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; |
15 | 18 | public int bufpos = -1; |
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protected int bufline[]; |
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protected int bufcolumn[]; |
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|
19 | 18 | protected int column = 0; |
20 | 18 | protected int line = 1; |
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|
22 | 18 | protected boolean prevCharIsCR = false; |
23 | 18 | protected boolean prevCharIsLF = false; |
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protected java.io.Reader inputStream; |
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protected char[] buffer; |
28 | 18 | protected int maxNextCharInd = 0; |
29 | 18 | protected int inBuf = 0; |
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protected void ExpandBuff(boolean wrapAround) |
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{ |
33 | 0 | char[] newbuffer = new char[bufsize + 2048]; |
34 | 0 | int newbufline[] = new int[bufsize + 2048]; |
35 | 0 | int newbufcolumn[] = new int[bufsize + 2048]; |
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|
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try |
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{ |
39 | 0 | if (wrapAround) |
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{ |
41 | 0 | System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); |
42 | 0 | System.arraycopy(buffer, 0, newbuffer, |
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bufsize - tokenBegin, bufpos); |
44 | 0 | buffer = newbuffer; |
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|
46 | 0 | System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); |
47 | 0 | System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos); |
48 | 0 | bufline = newbufline; |
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|
50 | 0 | System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); |
51 | 0 | System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos); |
52 | 0 | bufcolumn = newbufcolumn; |
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|
54 | 0 | maxNextCharInd = (bufpos += (bufsize - tokenBegin)); |
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} |
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else |
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{ |
58 | 0 | System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); |
59 | 0 | buffer = newbuffer; |
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|
61 | 0 | System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); |
62 | 0 | bufline = newbufline; |
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|
64 | 0 | System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); |
65 | 0 | bufcolumn = newbufcolumn; |
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|
67 | 0 | maxNextCharInd = (bufpos -= tokenBegin); |
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} |
69 | 0 | } |
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catch (Throwable t) |
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{ |
72 | 0 | throw new Error(t.getMessage()); |
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} |
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|
76 | 0 | bufsize += 2048; |
77 | 0 | available = bufsize; |
78 | 0 | tokenBegin = 0; |
79 | 0 | } |
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protected void FillBuff() throws java.io.IOException |
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{ |
83 | 42 | if (maxNextCharInd == available) |
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{ |
85 | 0 | if (available == bufsize) |
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{ |
87 | 0 | if (tokenBegin > 2048) |
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{ |
89 | 0 | bufpos = maxNextCharInd = 0; |
90 | 0 | available = tokenBegin; |
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} |
92 | 0 | else if (tokenBegin < 0) |
93 | 0 | bufpos = maxNextCharInd = 0; |
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else |
95 | 0 | ExpandBuff(false); |
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} |
97 | 0 | else if (available > tokenBegin) |
98 | 0 | available = bufsize; |
99 | 0 | else if ((tokenBegin - available) < 2048) |
100 | 0 | ExpandBuff(true); |
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else |
102 | 0 | available = tokenBegin; |
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} |
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int i; |
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try { |
107 | 42 | if ((i = inputStream.read(buffer, maxNextCharInd, |
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available - maxNextCharInd)) == -1) |
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{ |
110 | 15 | inputStream.close(); |
111 | 15 | throw new java.io.IOException(); |
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} |
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else |
114 | 14 | maxNextCharInd += i; |
115 | 14 | return; |
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} |
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catch(java.io.IOException e) { |
118 | 28 | --bufpos; |
119 | 28 | backup(0); |
120 | 28 | if (tokenBegin == -1) |
121 | 28 | tokenBegin = bufpos; |
122 | 28 | throw e; |
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} |
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} |
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public char BeginToken() throws java.io.IOException |
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{ |
128 | 5961 | tokenBegin = -1; |
129 | 5961 | char c = readChar(); |
130 | 5933 | tokenBegin = bufpos; |
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132 | 5933 | return c; |
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} |
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protected void UpdateLineColumn(char c) |
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{ |
137 | 9975 | column++; |
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|
139 | 9975 | if (prevCharIsLF) |
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{ |
141 | 558 | prevCharIsLF = false; |
142 | 558 | line += (column = 1); |
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} |
144 | 9417 | else if (prevCharIsCR) |
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{ |
146 | 571 | prevCharIsCR = false; |
147 | 571 | if (c == '\n') |
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{ |
149 | 571 | prevCharIsLF = true; |
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} |
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else |
152 | 0 | line += (column = 1); |
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} |
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155 | 9975 | switch (c) |
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{ |
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case '\r' : |
158 | 571 | prevCharIsCR = true; |
159 | 571 | break; |
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case '\n' : |
161 | 571 | prevCharIsLF = true; |
162 | 571 | break; |
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case '\t' : |
164 | 0 | column--; |
165 | 0 | column += (8 - (column & 07)); |
166 | 0 | break; |
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default : |
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break; |
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} |
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|
171 | 9975 | bufline[bufpos] = line; |
172 | 9975 | bufcolumn[bufpos] = column; |
173 | 9975 | } |
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public char readChar() throws java.io.IOException |
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{ |
177 | 10389 | if (inBuf > 0) |
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{ |
179 | 386 | --inBuf; |
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|
181 | 386 | if (++bufpos == bufsize) |
182 | 0 | bufpos = 0; |
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|
184 | 386 | return buffer[bufpos]; |
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} |
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187 | 10003 | if (++bufpos >= maxNextCharInd) |
188 | 42 | FillBuff(); |
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190 | 9975 | char c = buffer[bufpos]; |
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192 | 9975 | UpdateLineColumn(c); |
193 | 9975 | return (c); |
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} |
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public int getColumn() { |
202 | 0 | return bufcolumn[bufpos]; |
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} |
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public int getLine() { |
211 | 0 | return bufline[bufpos]; |
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} |
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public int getEndColumn() { |
215 | 1483 | return bufcolumn[bufpos]; |
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} |
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public int getEndLine() { |
219 | 1483 | return bufline[bufpos]; |
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} |
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public int getBeginColumn() { |
223 | 1483 | return bufcolumn[tokenBegin]; |
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} |
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public int getBeginLine() { |
227 | 1483 | return bufline[tokenBegin]; |
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} |
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public void backup(int amount) { |
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232 | 1895 | inBuf += amount; |
233 | 1895 | if ((bufpos -= amount) < 0) |
234 | 1 | bufpos += bufsize; |
235 | 1895 | } |
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public SimpleCharStream(java.io.Reader dstream, int startline, |
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int startcolumn, int buffersize) |
239 | 18 | { |
240 | 18 | inputStream = dstream; |
241 | 18 | line = startline; |
242 | 18 | column = startcolumn - 1; |
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|
244 | 18 | available = bufsize = buffersize; |
245 | 18 | buffer = new char[buffersize]; |
246 | 18 | bufline = new int[buffersize]; |
247 | 18 | bufcolumn = new int[buffersize]; |
248 | 18 | } |
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public SimpleCharStream(java.io.Reader dstream, int startline, |
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int startcolumn) |
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{ |
253 | 18 | this(dstream, startline, startcolumn, 4096); |
254 | 18 | } |
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public SimpleCharStream(java.io.Reader dstream) |
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{ |
258 | 0 | this(dstream, 1, 1, 4096); |
259 | 0 | } |
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public void ReInit(java.io.Reader dstream, int startline, |
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int startcolumn, int buffersize) |
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{ |
263 | 0 | inputStream = dstream; |
264 | 0 | line = startline; |
265 | 0 | column = startcolumn - 1; |
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|
267 | 0 | if (buffer == null || buffersize != buffer.length) |
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{ |
269 | 0 | available = bufsize = buffersize; |
270 | 0 | buffer = new char[buffersize]; |
271 | 0 | bufline = new int[buffersize]; |
272 | 0 | bufcolumn = new int[buffersize]; |
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} |
274 | 0 | prevCharIsLF = prevCharIsCR = false; |
275 | 0 | tokenBegin = inBuf = maxNextCharInd = 0; |
276 | 0 | bufpos = -1; |
277 | 0 | } |
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public SimpleCharStream(java.io.InputStream dstream, int startline, |
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int startcolumn, int buffersize) |
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{ |
282 | 0 | this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096); |
283 | 0 | } |
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public SimpleCharStream(java.io.InputStream dstream, int startline, |
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int startcolumn) |
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{ |
288 | 0 | this(dstream, startline, startcolumn, 4096); |
289 | 0 | } |
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public SimpleCharStream(java.io.InputStream dstream) |
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{ |
293 | 0 | this(dstream, 1, 1, 4096); |
294 | 0 | } |
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public String GetImage() |
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{ |
298 | 531 | if (bufpos >= tokenBegin) |
299 | 531 | return new String(buffer, tokenBegin, bufpos - tokenBegin + 1); |
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else |
301 | 0 | return new String(buffer, tokenBegin, bufsize - tokenBegin) + |
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new String(buffer, 0, bufpos + 1); |
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} |
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public void Done() |
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{ |
307 | 0 | buffer = null; |
308 | 0 | bufline = null; |
309 | 0 | bufcolumn = null; |
310 | 0 | } |
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} |