1 /*
2  * Copyright 2023 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 #pragma once
17 
18 #include <android/log.h>
19 
20 #include <sstream>
21 
22 extern std::ostream aout;
23 extern std::ostream aerr;
24 
25 /*!
26  * Use this class to create an output stream that writes to logcat. By default, a global one is
27  * defined as @a aout
28  */
29 class AndroidOut : public std::stringbuf {
30 public:
31     /*!
32      * Creates a new output stream for logcat
33      * @param kLogTag the log tag to output
34      */
AndroidOut(const char * logTag,android_LogPriority priority)35     inline AndroidOut(const char* logTag, android_LogPriority priority)
36           : mLogTag(logTag), mPriority(priority) {}
37 
38 protected:
sync()39     virtual int sync() override {
40         __android_log_print(mPriority, mLogTag, "%s", str().c_str());
41 
42         str("");
43         return 0;
44     }
45 
46 private:
47     const char* mLogTag;
48     android_LogPriority mPriority;
49 };
50