/* | |
* | |
* 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); | |
} | |
} |