1 /*
2 * #%L
3 * Native ARchive plugin for Maven
4 * %%
5 * Copyright (C) 2002 - 2014 NAR Maven Plugin developers.
6 * %%
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
10 *
11 * http://www.apache.org/licenses/LICENSE-2.0
12 *
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * #L%
19 */
20 package com.github.maven_nar.cpptasks.parser;
21
22 import java.io.IOException;
23 import java.io.Reader;
24
25 /**
26 * An abstract base class for simple parsers
27 *
28 * @author Curt Arnold
29 */
30 public abstract class AbstractParser {
31 /**
32 *
33 *
34 */
35 protected AbstractParser() {
36 }
37
38 protected abstract void addFilename(String filename);
39
40 public abstract AbstractParserState getNewLineState();
41
42 protected void parse(final Reader reader) throws IOException {
43 final char[] buf = new char[4096];
44 final AbstractParserState newLineState = getNewLineState();
45 AbstractParserState state = newLineState;
46 int charsRead = -1;
47 do {
48 charsRead = reader.read(buf, 0, buf.length);
49 if (state == null) {
50 for (int i = 0; i < charsRead; i++) {
51 if (buf[i] == '\n') {
52 state = newLineState;
53 break;
54 }
55 }
56 }
57 if (state != null) {
58 for (int i = 0; i < charsRead; i++) {
59 state = state.consume(buf[i]);
60 //
61 // didn't match a production, skip to a new line
62 //
63 if (state == null) {
64 for (; i < charsRead; i++) {
65 if (buf[i] == '\n') {
66 state = newLineState;
67 break;
68 }
69 }
70 }
71 }
72 }
73 } while (charsRead >= 0);
74 }
75 }