source: cpp/common/loggers/loggers.h @ 1097

// This file is a part of Framsticks SDK.  http://www.framsticks.com/
// Copyright (C) 1999-2019  Maciej Komosinski and Szymon Ulatowski.
// See LICENSE.txt for details.

#ifndef _COMMON_LOGGERS_H_
#define _COMMON_LOGGERS_H_

#include <common/log.h>
#include <common/threads.h>
#include <common/nonstd_stl.h>

class LoggerBase;

class LoggerManager
{
        friend class LoggerBase;
        vector<LoggerBase*> loggers;
        void send(int position, const char *obj, const char *method, int level, const char *msg);
public:
        int find(LoggerBase *logger)
        {
                vector<LoggerBase*>::iterator it = std::find(loggers.begin(), loggers.end(), logger);
                return it == loggers.end() ? -1 : std::distance(loggers.begin(), it);
        }
        int add(LoggerBase *logger);
        void remove(int i);
        void remove(LoggerBase *logger);
        void removeAll();
        void send(const char *obj, const char *method, int level, const char *msg)
        {
                send(int(loggers.size())-1, obj, method, level, msg);
        }
        ~LoggerManager() { removeAll(); }
};

extern THREAD_LOCAL_DECL(LoggerManager, message_handler_manager_instance);

////////////////////////////////////////

class LoggerBase
{
        friend class LoggerManager;
protected:
        LoggerManager* manager;
        int options;

public:

        enum LoggerOptions
        {
                DontBlock = 1, CannotBeBlocked = 2, Enable = 4, Paused = 8
        };

        void logPrintf(const char *o, const char *m, int w, const char *bl, ...);
        void send(const char *obj, const char *method, int level, const char *msg);

        int getOptions() { return options; }
        bool isEnabled() { return manager ? true : false; }
        void enable();
        void disable();
        bool isPaused() { return (options & Paused) != 0; }
        void pause();
        void resume();

        LoggerBase(int opts = 0) :manager(NULL), options(opts)
        {
                if (options&Enable) enable();
        }
        virtual ~LoggerBase()
        {
                disable();
        }

        virtual void handle(const char *obj, const char *method, int level, const char *msg); ///< implemented by loggers accepting multiline messages. if not implemented, the default handle() splits multiline text into single lines and calls handleSingleLine()
        virtual void handleSingleLine(const char *obj, const char *method, int level, const char *msg) {}  ///< implemented by loggers expecting single line messages
};

///////////////////////////////////////////

class LoggerToMemory : public LoggerBase
{
protected:
        int maxlevel, minleveltostore, errcount, warncount, infocount, storedcount;
        string msgs;

public:

        void reset() { maxlevel = LOG_MIN - 1; errcount = warncount = infocount = storedcount = 0; msgs = ""; }

        enum Options2
        {
                StoreFirstMessage = 16, StoreAllMessages = 32
        };

        int getErrorCount() const   { return errcount; }
        int getWarningCount() const { return warncount; }
        int getInfoCount() const    { return infocount; }
        int getStoredCount() const  { return storedcount; }
        int getErrorLevel() const   { return maxlevel; }
        string getMessages() const  { return msgs; }
        string getCountSummary() const; ///< return the standard "... error(s), ... warning(s), ... message(s)" text (or empty string if count==0)
        void setStoreOptions(int opts) {options=options&(~(StoreFirstMessage|StoreAllMessages))|(opts&(StoreFirstMessage|StoreAllMessages));}
        
        LoggerToMemory(int opts = 0, int minimal_level_to_store = LOG_ERROR) :LoggerBase(opts), minleveltostore(minimal_level_to_store)
        {
                reset();
        }

        void handle(const char *obj, const char *method, int level, const char *msg);
};

class RedirectingLogger : public LoggerBase
{
        LoggerManager *other_manager;
public:
        RedirectingLogger(LoggerManager *other_mgr, int opts = 0)
                :LoggerBase(opts), other_manager(other_mgr) {}

        void handle(const char *obj, const char *method, int level, const char *msg)
        {
                other_manager->send(obj, method, level, msg);
        }
};

#endif