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#ifndef MULTILOG_H
#define MULTILOG_H
#include <stdio.h>
#include <stdarg.h>
#include <time.h>
#include "ringlist.h"
#include "linkedlist.h"
#include "singleton.h"
/**
* Calls the DetailLog function but includes pre-processor macros to fill in
* most of the fields for you. This makes your life a lot easier, and makes the
* log useful for system debugging as well as just letting people know what's
* going on.
*@param LEVEL The log level, comes from an enum in the MultiLog class.
*@param FORMAT The text to store in the log, using printf style formatting.
*@param ... Parameters to help format the text in the FROMAT param.
*/
#define LineLog( LEVEL, FORMAT, ...) DetailLog( LEVEL, __FILE__, __LINE__, __PRETTY_FUNCTION__, FORMAT, ##__VA_ARGS__ )
#define MultiLineLog( LEVEL, FORMAT, ...) MultiLog::getInstance().DetailLog( LEVEL, __FILE__, __LINE__, __PRETTY_FUNCTION__, FORMAT, ##__VA_ARGS__ )
/** MultiLog keeps track of logfile info in a myriad of varieties, and is
* easily configurable between them all. It allows output to the standard
* output, error output, files, networks, and streams, which includes memory
* buffers.
* MultiLog uses the singleton pattern to keep only a single instance of
* the log. Instead of instantiating a new copy, call the getLog method.
*@author Mike Buland
*/
class MultiLog : public Singleton<MultiLog>
{
friend class Singleton<MultiLog>;
public:
/**
* Keeps track of a single log entry, in a standard format, that can be
* processed by any MultiLogChannel derrived class.
*@author Mike Buland
*/
typedef struct LogEntry
{
/** Safely delete a log entry. */
virtual ~LogEntry();
time_t xTime; /**< The time the log entry was made. */
int nLevel; /**< The log-level of the entry. */
char *lpFile; /**< The name of the file this entry came from. */
int nLine; /**< The line number that this log came from. */
char *lpText; /**< The text content of this log entry. */
} LogEntry;
protected:
/**
* Private constructor, this ensures that this is a singleton.
*/
MultiLog();
/**
* Destroy the multilog.
*/
virtual ~MultiLog();
/**
* Append a new logentry to the log list, possibly pushing an old entry off.
*@param pEntry The new entry to append.
*/
void append( LogEntry *pEntry );
/**
* The actual log entry storage mechanism.
*/
RingList *rEntry;
/**
* The number of entries that have rolled off the end of the RingList.
*/
unsigned long nEntriesLost;
/**
* A list of all channels that are registered with the MultiLog.
*/
LinkedList *lChannel;
public:
/** Sends info to the logfile.
*@param nLevel The type of data being logged (error, info, etc.)
*@param lpFormat The data to send to the log.
*@author Mike Buland
*/
//void Log( int nLevel, const char *lpFormat, ...);
/** Sends info to the logfile with extra information, including the files
* that it was called from and the line in the code. Besides that, it's
* exactly the same as Log. Please use the LineLog macro to make DetailLog
* really easy to use. It operates exacly like Log, but inserts the
* builtin macros as the lpFile and nLine parameters.
*@param nLevel The type of data being logged (error, info, etc.)
*@param lpFile The name of the file that called the log function.
*@param nLine The line in the file that this log function was called from.
*@param lpFunction The name of the function that called the log function.
*@param lpFormat The data to send to the log.
*@author Mike Buland
*/
void DetailLog( int nLevel, const char *lpFile, int nLine, const char *lpFunction, const char *lpFormat, ...);
/**
* Adds a logging channel to the MultiLog channel chain. Every added
* channel will automatically receive a complete log of everything that
* happened before the channel was added as well as all future messages.
*@param pChannel A pointer to the pre-contructed channel object to add.
*/
void addChannel( class MultiLogChannel *pChannel );
/** The various pre-defined levels available to use when logging.
* The person logging can make up their own, just make sure to remember
* which value is which (all levels are integers).
*@author Mike Buland
*/
enum Levels
{
LError,
LWarning,
LInfo,
LStatus
};
};
#endif
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