1 /*
2  * Copyright (C) 2008 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 // All static variables go here, to control initialization and
18 // destruction order in the library.
19 
20 #include "Static.h"
21 
22 #include "BufferedTextOutput.h"
23 #include <binder/IPCThreadState.h>
24 #include <utils/Log.h>
25 
26 namespace android {
27 
28 // ------------ Text output streams
29 
30 Vector<int32_t> gTextBuffers;
31 
32 class LogTextOutput : public BufferedTextOutput
33 {
34 public:
LogTextOutput()35     LogTextOutput() : BufferedTextOutput(MULTITHREADED) { }
~LogTextOutput()36     virtual ~LogTextOutput() { };
37 
38 protected:
writeLines(const struct iovec & vec,size_t N)39     virtual status_t writeLines(const struct iovec& vec, size_t N)
40     {
41         //android_writevLog(&vec, N);       <-- this is now a no-op
42         if (N != 1) ALOGI("WARNING: writeLines N=%zu\n", N);
43         ALOGI("%.*s", (int)vec.iov_len, (const char*) vec.iov_base);
44         return NO_ERROR;
45     }
46 };
47 
48 class FdTextOutput : public BufferedTextOutput
49 {
50 public:
FdTextOutput(int fd)51     explicit FdTextOutput(int fd) : BufferedTextOutput(MULTITHREADED), mFD(fd) { }
~FdTextOutput()52     virtual ~FdTextOutput() { };
53 
54 protected:
writeLines(const struct iovec & vec,size_t N)55     virtual status_t writeLines(const struct iovec& vec, size_t N)
56     {
57         ssize_t ret = writev(mFD, &vec, N);
58         if (ret == -1) return -errno;
59         if (static_cast<size_t>(ret) != N) return UNKNOWN_ERROR;
60         return NO_ERROR;
61     }
62 
63 private:
64     int mFD;
65 };
66 
67 TextOutput& alog(*new LogTextOutput());
68 TextOutput& aout(*new FdTextOutput(STDOUT_FILENO));
69 TextOutput& aerr(*new FdTextOutput(STDERR_FILENO));
70 
71 }   // namespace android
72