1 /*
2 * Copyright (C) 2017 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 #include "util/base/logging_raw.h"
18
19 #include <stdio.h>
20 #include <string>
21
22 // NOTE: this file contains two implementations: one for Android, one for all
23 // other cases. We always build exactly one implementation.
24 #if defined(__ANDROID__)
25
26 // Compiled as part of Android.
27 #include <android/log.h>
28
29 namespace libtextclassifier {
30 namespace logging {
31
32 namespace {
33 // Converts LogSeverity to level for __android_log_write.
GetAndroidLogLevel(LogSeverity severity)34 int GetAndroidLogLevel(LogSeverity severity) {
35 switch (severity) {
36 case FATAL:
37 return ANDROID_LOG_FATAL;
38 case ERROR:
39 return ANDROID_LOG_ERROR;
40 case WARNING:
41 return ANDROID_LOG_WARN;
42 case INFO:
43 return ANDROID_LOG_INFO;
44 default:
45 return ANDROID_LOG_DEBUG;
46 }
47 }
48 } // namespace
49
LowLevelLogging(LogSeverity severity,const std::string & tag,const std::string & message)50 void LowLevelLogging(LogSeverity severity, const std::string& tag,
51 const std::string& message) {
52 const int android_log_level = GetAndroidLogLevel(severity);
53 #if !defined(TC_DEBUG_LOGGING)
54 if (android_log_level != ANDROID_LOG_ERROR &&
55 android_log_level != ANDROID_LOG_FATAL) {
56 return;
57 }
58 #endif
59 __android_log_write(android_log_level, tag.c_str(), message.c_str());
60 }
61
62 } // namespace logging
63 } // namespace libtextclassifier
64
65 #else // if defined(__ANDROID__)
66
67 // Not on Android: implement LowLevelLogging to print to stderr (see below).
68 namespace libtextclassifier {
69 namespace logging {
70
71 namespace {
72 // Converts LogSeverity to human-readable text.
LogSeverityToString(LogSeverity severity)73 const char *LogSeverityToString(LogSeverity severity) {
74 switch (severity) {
75 case INFO:
76 return "INFO";
77 case WARNING:
78 return "WARNING";
79 case ERROR:
80 return "ERROR";
81 case FATAL:
82 return "FATAL";
83 default:
84 return "UNKNOWN";
85 }
86 }
87 } // namespace
88
LowLevelLogging(LogSeverity severity,const std::string & tag,const std::string & message)89 void LowLevelLogging(LogSeverity severity, const std::string &tag,
90 const std::string &message) {
91 fprintf(stderr, "[%s] %s : %s\n", LogSeverityToString(severity), tag.c_str(),
92 message.c_str());
93 fflush(stderr);
94 }
95
96 } // namespace logging
97 } // namespace libtextclassifier
98
99 #endif // if defined(__ANDROID__)
100