1 /*
2  * Copyright (C) 2012 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License"); you may not
5  * use this file except in compliance with the License. You may obtain a copy of
6  * 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, WITHOUT
12  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
13  * License for the specific language governing permissions and limitations under
14  * the License.
15  */
16 
17 
18 #ifndef CTSAUDIO_FILEUTIL_H
19 #define CTSAUDIO_FILEUTIL_H
20 
21 #include <stdarg.h>
22 
23 #include <utils/String8.h>
24 #include <utils/threads.h>
25 #include <iostream>
26 #include <fstream>
27 
28 /**
29  * Class to write to file and stdout at the same time.
30  *
31  */
32 class FileUtil {
33 public:
34     /**
35      * create log / report dir
36      * @param dirPath returns path of created dir
37      */
38     static bool prepare(android::String8& dirPath);
39 
40 protected:
41     FileUtil();
42     virtual ~FileUtil();
43 
44     /**
45      * if fileName is NULL, only stdout output will be supproted
46      */
47     virtual bool init(const char* fileName);
48 
49     virtual bool doPrintf(const char* fmt, ...);
50     /// fileOnly log only to file
51     /// loglevel 0 .., -1 means no log level.
52     virtual bool doVprintf(bool fileOnly, int loglevel, const char *fmt, va_list ap);
53 
54 private:
55     // store dirPath to prevent creating multiple times
56     static android::String8 mDirPath;
57     std::ofstream mFile;
58     static const int DEFAULT_BUFFER_SIZE = 1024;
59     // buffer for printf. one line longer than this will be truncated.
60     char* mBuffer;
61     int mBufferSize;
62     android::Mutex mWriteLock;
63 };
64 
65 
66 #endif // CTSAUDIO_FILEUTIL_H
67