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      1 /*
      2  * Copyright (C) 2016 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.bugreport.logcat;
     18 
     19 import com.android.bugreport.util.Line;
     20 import com.android.bugreport.util.Lines;
     21 import com.android.bugreport.util.Utils;
     22 
     23 import java.util.regex.Pattern;
     24 import java.util.regex.Matcher;
     25 
     26 /**
     27  * Parses a stream of text as a logcat.
     28  */
     29 public class LogcatParser {
     30 
     31     public static final Pattern BUFFER_BEGIN_RE = Pattern.compile(
     32             "--------- beginning of (.*)");
     33     private static final Pattern LOG_LINE_RE = Pattern.compile(
     34             "(" + Utils.DATE_TIME_MS_PATTERN
     35                 + "\\s+(\\d+)\\s+(\\d+)\\s+(.)\\s+)(.*?):\\s(.*)");
     36 
     37     private final Matcher mBufferBeginRe = BUFFER_BEGIN_RE.matcher("");
     38     private final Matcher mLogLineRe = LOG_LINE_RE.matcher("");
     39 
     40     /**
     41      * Constructor
     42      */
     43     public LogcatParser() {
     44     }
     45 
     46     /**
     47      * Parse the logcat lines, returning a Logcat object.
     48      */
     49     public Logcat parse(Lines<? extends Line> lines) {
     50         final Logcat result = new Logcat();
     51 
     52         Matcher m;
     53         int lineno = 0;
     54 
     55         while (lines.hasNext()) {
     56             final Line line = lines.next();
     57             final String text = line.text;
     58 
     59             if ((m = Utils.match(mBufferBeginRe, text)) != null) {
     60                 // Beginning of buffer marker
     61                 final LogLine ll = new LogLine();
     62 
     63                 ll.lineno = lineno++;
     64                 ll.rawText = text;
     65                 ll.bufferBegin = m.group(1);
     66 
     67                 result.lines.add(ll);
     68             } else if ((m = Utils.match(mLogLineRe, text)) != null) {
     69                 // Matched line
     70                 final LogLine ll = new LogLine();
     71 
     72                 ll.lineno = lineno++;
     73                 ll.rawText = text;
     74                 ll.header = m.group(1);
     75                 ll.time = Utils.parseCalendar(m, 2, true);
     76                 ll.pid = Integer.parseInt(m.group(9));
     77                 ll.tid = Integer.parseInt(m.group(10));
     78                 ll.level = m.group(11).charAt(0);
     79                 ll.tag = m.group(12);
     80                 ll.text = m.group(13);
     81 
     82                 result.lines.add(ll);
     83 
     84                 if (false) {
     85                     System.out.println("LogLine: time=" + ll.time + " pid=" + ll.pid
     86                             + " tid=" + ll.tid + " level=" + ll.level + " tag=" + ll.tag
     87                             + " text=" + ll.text);
     88                 }
     89             } else {
     90                 if (false) {
     91                     System.out.println("\nUNMATCHED: [" + text + "]");
     92                 }
     93             }
     94         }
     95 
     96         return result;
     97     }
     98 
     99 }
    100