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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
SimpleCharStream.java | - | - | - | - |
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/* Generated By:JavaCC: Do not edit this line. SimpleCharStream.java Version 2.1 */
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// Copyright 2004 The Apache Software Foundation
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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///CLOVER:OFF
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package org.apache.hivemind.sdl.parser;
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/**
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* An implementation of interface CharStream, where the stream is assumed to
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* contain only ASCII characters (without unicode processing).
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*/
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public final 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;
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public int bufpos = -1; |
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private int bufline[]; |
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private int bufcolumn[]; |
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private int column = 0; |
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private int line = 1; |
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private boolean prevCharIsCR = false; |
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private boolean prevCharIsLF = false; |
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private java.io.Reader inputStream;
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private char[] buffer; |
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private int maxNextCharInd = 0; |
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private int inBuf = 0; |
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private final void ExpandBuff(boolean wrapAround) |
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{ |
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char[] newbuffer = new char[bufsize + 2048]; |
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int newbufline[] = new int[bufsize + 2048]; |
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int newbufcolumn[] = new int[bufsize + 2048]; |
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try
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{ |
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if (wrapAround)
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{ |
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System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); |
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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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System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); |
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System.arraycopy(bufline, 0, newbufline, bufsize - tokenBegin, bufpos); |
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bufline = newbufline; |
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System.arraycopy(bufcolumn, tokenBegin, newbufcolumn, 0, bufsize - tokenBegin); |
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System.arraycopy(bufcolumn, 0, newbufcolumn, bufsize - tokenBegin, bufpos); |
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bufcolumn = newbufcolumn; |
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maxNextCharInd = (bufpos += (bufsize - tokenBegin)); |
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} |
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else
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{ |
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System.arraycopy(buffer, tokenBegin, newbuffer, 0, bufsize - tokenBegin); |
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buffer = newbuffer; |
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System.arraycopy(bufline, tokenBegin, newbufline, 0, bufsize - tokenBegin); |
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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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maxNextCharInd = (bufpos -= tokenBegin); |
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} |
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} |
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catch (Throwable t)
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{ |
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throw new Error(t.getMessage()); |
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} |
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bufsize += 2048; |
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available = bufsize; |
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tokenBegin = 0; |
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} |
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private final void FillBuff() throws java.io.IOException |
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{ |
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if (maxNextCharInd == available)
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{ |
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if (available == bufsize)
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{ |
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if (tokenBegin > 2048)
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{ |
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bufpos = maxNextCharInd = 0; |
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available = tokenBegin; |
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} |
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else if (tokenBegin < 0) |
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bufpos = maxNextCharInd = 0; |
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else
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ExpandBuff(false);
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} |
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else if (available > tokenBegin) |
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available = bufsize; |
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else if ((tokenBegin - available) < 2048) |
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ExpandBuff(true);
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else
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available = tokenBegin; |
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} |
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int i;
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try {
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if ((i = inputStream.read(buffer, maxNextCharInd,
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available - maxNextCharInd)) == -1) |
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{ |
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inputStream.close(); |
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throw new java.io.IOException(); |
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} |
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else
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maxNextCharInd += i; |
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return;
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} |
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catch(java.io.IOException e) {
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--bufpos; |
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backup(0); |
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if (tokenBegin == -1)
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tokenBegin = bufpos; |
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throw e;
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} |
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} |
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public final char BeginToken() throws java.io.IOException |
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{ |
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tokenBegin = -1; |
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char c = readChar();
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tokenBegin = bufpos; |
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return c;
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} |
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private final void UpdateLineColumn(char c) |
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{ |
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column++; |
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if (prevCharIsLF)
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{ |
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prevCharIsLF = false;
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line += (column = 1); |
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} |
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else if (prevCharIsCR) |
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{ |
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prevCharIsCR = false;
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if (c == '\n')
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{ |
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prevCharIsLF = true;
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} |
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else
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line += (column = 1); |
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} |
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switch (c)
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{ |
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case '\r' :
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prevCharIsCR = true;
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break;
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case '\n' :
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prevCharIsLF = true;
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break;
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case '\t' :
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column--; |
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column += (8 - (column & 07)); |
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break;
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default :
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break;
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} |
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bufline[bufpos] = line; |
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bufcolumn[bufpos] = column; |
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} |
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public final char readChar() throws java.io.IOException |
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{ |
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if (inBuf > 0)
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{ |
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--inBuf; |
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if (++bufpos == bufsize)
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bufpos = 0; |
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return buffer[bufpos];
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} |
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if (++bufpos >= maxNextCharInd)
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FillBuff(); |
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char c = buffer[bufpos];
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UpdateLineColumn(c); |
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return (c);
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} |
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/**
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* @deprecated
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* @see #getEndColumn
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*/
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public final int getColumn() { |
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return bufcolumn[bufpos];
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} |
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/**
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* @deprecated
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* @see #getEndLine
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*/
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public final int getLine() { |
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return bufline[bufpos];
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} |
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public final int getEndColumn() { |
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return bufcolumn[bufpos];
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} |
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public final int getEndLine() { |
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return bufline[bufpos];
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} |
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public final int getBeginColumn() { |
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return bufcolumn[tokenBegin];
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} |
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public final int getBeginLine() { |
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return bufline[tokenBegin];
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} |
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public final void backup(int amount) { |
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inBuf += amount; |
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if ((bufpos -= amount) < 0)
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bufpos += bufsize; |
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} |
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public SimpleCharStream(java.io.Reader dstream, int startline, |
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int startcolumn, int buffersize) |
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{ |
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inputStream = dstream; |
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line = startline; |
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column = startcolumn - 1; |
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available = bufsize = buffersize; |
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buffer = new char[buffersize]; |
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bufline = new int[buffersize]; |
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bufcolumn = new int[buffersize]; |
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} |
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public SimpleCharStream(java.io.Reader dstream, int startline, |
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int startcolumn)
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{ |
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this(dstream, startline, startcolumn, 4096);
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} |
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public SimpleCharStream(java.io.Reader dstream)
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{ |
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this(dstream, 1, 1, 4096);
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} |
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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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{ |
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inputStream = dstream; |
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line = startline; |
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column = startcolumn - 1; |
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if (buffer == null || buffersize != buffer.length) |
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{ |
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available = bufsize = buffersize; |
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buffer = new char[buffersize]; |
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bufline = new int[buffersize]; |
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bufcolumn = new int[buffersize]; |
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} |
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prevCharIsLF = prevCharIsCR = false;
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tokenBegin = inBuf = maxNextCharInd = 0; |
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bufpos = -1; |
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} |
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public void ReInit(java.io.Reader dstream, int startline, |
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int startcolumn)
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{ |
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ReInit(dstream, startline, startcolumn, 4096); |
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} |
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public void ReInit(java.io.Reader dstream) |
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{ |
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ReInit(dstream, 1, 1, 4096); |
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} |
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public SimpleCharStream(java.io.InputStream dstream, int startline, |
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int startcolumn, int buffersize) |
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{ |
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this(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096); |
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} |
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public SimpleCharStream(java.io.InputStream dstream, int startline, |
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int startcolumn)
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{ |
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this(dstream, startline, startcolumn, 4096);
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} |
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public SimpleCharStream(java.io.InputStream dstream)
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{ |
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this(dstream, 1, 1, 4096);
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} |
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public void ReInit(java.io.InputStream dstream, int startline, |
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int startcolumn, int buffersize) |
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{ |
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ReInit(new java.io.InputStreamReader(dstream), startline, startcolumn, 4096);
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} |
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public void ReInit(java.io.InputStream dstream) |
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{ |
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ReInit(dstream, 1, 1, 4096); |
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} |
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public void ReInit(java.io.InputStream dstream, int startline, |
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int startcolumn)
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{ |
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ReInit(dstream, startline, startcolumn, 4096); |
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} |
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public final String GetImage()
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{ |
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if (bufpos >= tokenBegin)
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return new String(buffer, tokenBegin, bufpos - tokenBegin + 1); |
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else
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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 final char[] GetSuffix(int len) |
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{ |
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char[] ret = new char[len]; |
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if ((bufpos + 1) >= len)
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System.arraycopy(buffer, bufpos - len + 1, ret, 0, len); |
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else
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{ |
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System.arraycopy(buffer, bufsize - (len - bufpos - 1), ret, 0, |
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len - bufpos - 1); |
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System.arraycopy(buffer, 0, ret, len - bufpos - 1, bufpos + 1); |
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} |
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return ret;
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} |
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360 |
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public void Done() |
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{ |
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buffer = null;
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bufline = null;
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bufcolumn = null;
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} |
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367 |
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/**
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* Method to adjust line and column numbers for the start of a token.<BR>
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370 |
*/
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371 |
public void adjustBeginLineColumn(int newLine, int newCol) |
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372 |
{ |
|
373 |
int start = tokenBegin;
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374 |
int len;
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375 |
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376 |
if (bufpos >= tokenBegin)
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377 |
{ |
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378 |
len = bufpos - tokenBegin + inBuf + 1; |
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379 |
} |
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380 |
else
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381 |
{ |
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382 |
len = bufsize - tokenBegin + bufpos + 1 + inBuf; |
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383 |
} |
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384 |
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385 |
int i = 0, j = 0, k = 0;
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int nextColDiff = 0, columnDiff = 0;
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387 |
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388 |
while (i < len &&
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bufline[j = start % bufsize] == bufline[k = ++start % bufsize]) |
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{ |
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bufline[j] = newLine; |
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nextColDiff = columnDiff + bufcolumn[k] - bufcolumn[j]; |
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393 |
bufcolumn[j] = newCol + columnDiff; |
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columnDiff = nextColDiff; |
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i++; |
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396 |
} |
|
397 |
|
|
398 |
if (i < len)
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{ |
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400 |
bufline[j] = newLine++; |
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401 |
bufcolumn[j] = newCol + columnDiff; |
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402 |
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403 |
while (i++ < len)
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{ |
|
405 |
if (bufline[j = start % bufsize] != bufline[++start % bufsize])
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406 |
bufline[j] = newLine++; |
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407 |
else
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408 |
bufline[j] = newLine; |
|
409 |
} |
|
410 |
} |
|
411 |
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412 |
line = bufline[j]; |
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413 |
column = bufcolumn[j]; |
|
414 |
} |
|
415 |
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|
416 |
} |
|
417 |
|
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