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/*
*
* Copyright 2001-2004 The Ant-Contrib project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.sf.antcontrib.cpptasks.parser;
import java.io.IOException;
import java.io.Reader;
/**
* An abstract base class for simple parsers
*
* @author Curt Arnold
*/
public abstract class AbstractParser {
/**
*
*
*/
protected AbstractParser() {
}
protected abstract void addFilename(String filename);
public abstract AbstractParserState getNewLineState();
protected void parse(Reader reader) throws IOException {
char[] buf = new char[4096];
AbstractParserState newLineState = getNewLineState();
AbstractParserState state = newLineState;
int charsRead = -1;
do {
charsRead = reader.read(buf, 0, buf.length);
if (state == null) {
for (int i = 0; i < charsRead; i++) {
if (buf[i] == '\n') {
state = newLineState;
break;
}
}
}
if (state != null) {
for (int i = 0; i < charsRead; i++) {
state = state.consume(buf[i]);
//
// didn't match a production, skip to a new line
//
if (state == null) {
for (; i < charsRead; i++) {
if (buf[i] == '\n') {
state = newLineState;
break;
}
}
}
}
}
} while (charsRead >= 0);
}
}
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