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      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 #include <stdio.h>
     17 #include <stdarg.h>
     18 
     19 #include "StringUtil.h"
     20 #include "Log.h"
     21 
     22 Log* Log::mInstance = NULL;
     23 
     24 #define ASSERT_PLAIN(cond) if(!(cond)) { fprintf(stderr, \
     25         "assertion failed %s %d", __FILE__, __LINE__); \
     26     *(char*)0 = 0; /* this will crash */};
     27 
     28 Log* Log::Instance(const char* dirName)
     29 {
     30     if (!mInstance) {
     31         mInstance = new Log();
     32         ASSERT_PLAIN(mInstance->init(dirName));
     33     }
     34     return mInstance;
     35 }
     36 void Log::Finalize()
     37 {
     38     delete mInstance;
     39     mInstance = NULL;
     40 }
     41 void Log::printf(LogLevel level, const char* fmt, ...)
     42 {
     43     va_list ap;
     44     va_start(ap, fmt);
     45     FileUtil::doVprintf(level < mLogLevel, level, fmt, ap);
     46     va_end(ap);
     47 }
     48 
     49 void Log::setLogLevel(LogLevel level)
     50 {
     51     mLogLevel = level;
     52 }
     53 
     54 Log::Log()
     55     : mLogLevel(ELogV)
     56 {
     57     ::fprintf(stderr, "Log level %d\n", mLogLevel);
     58 }
     59 
     60 Log::~Log()
     61 {
     62 
     63 }
     64 
     65 bool Log::init(const char* dirName)
     66 {
     67     if (dirName == NULL) {
     68         return true;
     69     }
     70     android::String8 logFile;
     71     if (logFile.appendFormat("%s/log.txt", dirName) != 0) {
     72         return false;
     73     }
     74     return FileUtil::init(logFile.string());
     75 }
     76 
     77 
     78 
     79