////  LogHandler.cpp//  libraries/shared/src////  Created by Stephen Birarda on 2014-10-28.//  Migrated from Logging.cpp created on 6/11/13//  Copyright 2014 High Fidelity, Inc.////  Distributed under the Apache License, Version 2.0.//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html// #ifdef _WIN32#include <process.h>#define getpid _getpid#define getppid _getpid // hack to build#define pid_t int // hack to build#endif #include <qdebug.h>#include <qtimer.h> #include "LogHandler.h" LogHandler& LogHandler::getInstance() {    static LogHandler staticInstance;    return staticInstance;} LogHandler::LogHandler() :    _shouldOutputPID(false){    // setup our timer to flush the verbose logs every 5 seconds    QTimer* logFlushTimer = new QTimer(this);    connect(logFlushTimer, &QTimer::timeout, this, &LogHandler::flushRepeatedMessages);    logFlushTimer->start(VERBOSE_LOG_INTERVAL_SECONDS * 1000);} const char* stringForLogType(QtMsgType msgType) {    switch (msgType) {        case QtDebugMsg:            return "DEBUG";        case QtCriticalMsg:            return "CRITICAL";        case QtFatalMsg:            return "FATAL";        case QtWarningMsg:            return "WARNING";        default:            return "UNKNOWN";    }} // the following will produce 2000-10-02 13:55:36 -0700const char DATE_STRING_FORMAT[] = "%Y-%m-%d %H:%M:%S %z"; void LogHandler::flushRepeatedMessages() {    QHash<QString, int>::iterator message = _repeatMessageCountHash.begin();    while (message != _repeatMessageCountHash.end()) {        message = _repeatMessageCountHash.erase(message);    }} QString LogHandler::printMessage(QtMsgType type, const QMessageLogContext& context, const QString& message) {        if (message.isEmpty()) {        return QString();    }        if (type == QtDebugMsg) {        // for debug messages, check if this matches any of our regexes for repeated log messages        foreach(const QString& regexString, getInstance()._repeatedMessageRegexes) {            QRegExp repeatRegex(regexString);            if (repeatRegex.indexIn(message) != -1) {                                // we have a match - add 1 to the count of repeats for this message and set this as the last repeated message                _repeatMessageCountHash[regexString] += 1;                _lastRepeatedMessage[regexString] = message;                                // return out, we're not printing this one                return QString();            }        }    }        // log prefix is in the following format    // [DEBUG] [TIMESTAMP] [PID:PARENT_PID] [TARGET] logged string        QString prefixString = QString("[%1]").arg(stringForLogType(type));        time_t rawTime;    time(&rawTime);    struct tm* localTime = localtime(&rawTime);        char dateString[100];    strftime(dateString, sizeof(dateString), DATE_STRING_FORMAT, localTime);        prefixString.append(QString(" [%1]").arg(dateString));        if (_shouldOutputPID) {        prefixString.append(QString(" [%1").arg(getpid()));                pid_t parentProcessID = getppid();        if (parentProcessID != 0) {            prefixString.append(QString(":%1]").arg(parentProcessID));        } else {            prefixString.append("]");        }    }        if (!_targetName.isEmpty()) {        prefixString.append(QString(" [%1]").arg(_targetName));    }        QString logMessage = QString("%1 %2").arg(prefixString, message);    fprintf(stdout, "%s\n", qPrintable(logMessage));    return logMessage;} void LogHandler::verboseMessageHandler(QtMsgType type, const QMessageLogContext& context, const QString& message) {    getInstance().printMessage(type, context, message);}