third_party/android_platform/bionic/tools/relocation_packer/src/debug.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "debug.h"
   6
   7 #include <stdlib.h>
   8 #include <iostream>
   9 #include <string>
  10
  11 namespace relocation_packer {
  12
  13 // Construct a new message logger.  Prints if level is less than or equal to
  14 // the level set with SetVerbose() and predicate is true.
  15 Logger::Logger(Severity severity, int level, bool predicate) {
  16   severity_ = severity;
  17   level_ = level;
  18   predicate_ = predicate;
  19 }
  20
  21 // On destruction, flush and print the strings accumulated.  Abort if FATAL.
  22 Logger::~Logger() {
  23   if (predicate_) {
  24     if (level_ <= max_level_) {
  25       std::ostream* log = severity_ == INFO ? info_stream_ : error_stream_;
  26       std::string tag;
  27       switch (severity_) {
  28         case INFO: tag = "INFO"; break;
  29         case WARNING: tag = "WARNING"; break;
  30         case ERROR: tag = "ERROR"; break;
  31         case FATAL: tag = "FATAL"; break;
  32       }
  33       stream_.flush();
  34       *log << tag << ": " << stream_.str() << std::endl;
  35     }
  36     if (severity_ == FATAL)
  37       abort();
  38   }
  39 }
  40
  41 // Reset to initial state.
  42 void Logger::Reset() {
  43   max_level_ = -1;
  44   info_stream_ = &std::cout;
  45   error_stream_ = &std::cerr;
  46 }
  47
  48 // Verbosity.  Not thread-safe.
  49 int Logger::max_level_ = -1;
  50
  51 // Logging streams.  Not thread-safe.
  52 std::ostream* Logger::info_stream_ = &std::cout;
  53 std::ostream* Logger::error_stream_ = &std::cerr;
  54
  55 }  // namespace relocation_packer