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simple logger 

v1.0

if init with config file 

/*
splog.cfg ascii file
filename@loglevel@logtype

logtype=[tofile toconsole]
loglevel=[debug,info,warning,error,fatal]

example
log.txt@warning@tofile
*/

or 
#define SLOG_DEFAULT_INIT splog::logger GLOG;
#define SLOG_TOFILE_LEVEL_INIT(log_filename,loglevel) SLOG_COMMON_INIT(log_filename,loglevel,NULL)
#define SLOG_TOFILE_INIT(log_filename) SLOG_TOFILE_LEVEL_INIT(log_filename,(splog::LOGL_DEBUG))
#define SLOG_CFG_INIT(cfg_filename) SLOG_TOFILE_LEVEL_INIT(DEFAULT_LOG_FILENAME,(splog::LOGL_DEBUG),cfg_filename)
#define SLOG_CFG_DEFAULT_INIT	    SLOG_CFG_INIT(DEFAULT_CFG_FILENAME)

/*
default log write
*/
#define SLOG_DEBUG(foramt,...)	  GLOG.log_fmt_debug(foramt,##__VA_ARGS__)
#define SLOG_INFO(foramt,...)	  GLOG.log_fmt_info(foramt,##__VA_ARGS__)
#define SLOG_WARNING(foramt,...)  GLOG.log_fmt_warning(foramt,##__VA_ARGS__)
#define SLOG_ERROR(foramt,...)    GLOG.log_fmt_error(foramt,##__VA_ARGS__)
#define SLOG_FATAL(foramt,...)    GLOG.log_fmt_fatal(foramt,##__VA_ARGS__)

V1.1 2017.3.3.23
support linux version

add function name ,thread id information

support set_log_flag()
#define SLTIME  1 	    time
#define SLTID   2 		threadid
#define SLSRCFL 4 		filename line number
#define SLLEVEL 8  		level info
#define SLMSG   16 		sufix info
#define SLFUNCNAME 32 	function name
#define SLALL (SLTIME|SLTID|SLSRCFL|SLLEVEL|SLMSG|SLFUNCNAME)

SET_LOG_FLAG(SLALL)

v1.1.1 2017.6.12
add convenient error info function
#define SLOG_INVALID_ARGS				SLOG_FATAL("INVALID ARGUMENTS");
#define SLOG_NULL_POINTER				SLOG_FATAL("NULL POINTER");
#define SLOG_BUFFER_TOO_SMALL			SLOG_FATAL("DATA OR BUFFER TOO SMALL");
#define SLOG_BUFFER_TOO_LARGE			SLOG_FATAL("DATA OR BUFFER TOO LARGE");
#define SLOG_REACHHERE					SLOG_FATAL("REACH HERE");
#define SLOG_SYS_API_ERROR				SLOG_FATAL("CALL SYSAPI ERROR");