/* $Id$ */ /* * Copyright (C) 2008-2009 Teluu Inc. (http://www.teluu.com) * Copyright (C) 2003-2008 Benny Prijono * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #ifndef __PJ_LOG_H__ #define __PJ_LOG_H__ /** * @file log.h * @brief Logging Utility. */ #include #include PJ_BEGIN_DECL /** * @defgroup PJ_MISC Miscelaneous */ /** * @defgroup PJ_LOG Logging Facility * @ingroup PJ_MISC * @{ * * The PJLIB logging facility is a configurable, flexible, and convenient * way to write logging or trace information. * * To write to the log, one uses construct like below: * *
 *   ...
 *   PJ_LOG(3, ("main.c", "Starting hello..."));
 *   ...
 *   PJ_LOG(3, ("main.c", "Hello world from process %d", pj_getpid()));
 *   ...
 * 
* * In the above example, the number @b 3 controls the verbosity level of * the information (which means "information", by convention). The string * "main.c" specifies the source or sender of the message. * * * \section pj_log_quick_sample_sec Examples * * For examples, see: * - @ref page_pjlib_samples_log_c. * */ /** * Log decoration flag, to be specified with #pj_log_set_decor(). */ enum pj_log_decoration { PJ_LOG_HAS_DAY_NAME = 1, /**< Include day name [default: no] */ PJ_LOG_HAS_YEAR = 2, /**< Include year digit [no] */ PJ_LOG_HAS_MONTH = 4, /**< Include month [no] */ PJ_LOG_HAS_DAY_OF_MON = 8, /**< Include day of month [no] */ PJ_LOG_HAS_TIME = 16, /**< Include time [yes] */ PJ_LOG_HAS_MICRO_SEC = 32, /**< Include microseconds [yes] */ PJ_LOG_HAS_SENDER = 64, /**< Include sender in the log [yes] */ PJ_LOG_HAS_NEWLINE = 128, /**< Terminate each call with newline [yes] */ PJ_LOG_HAS_CR = 256, /**< Include carriage return [no] */ PJ_LOG_HAS_SPACE = 512, /**< Include two spaces before log [yes] */ PJ_LOG_HAS_COLOR = 1024, /**< Colorize logs [yes on win32] */ PJ_LOG_HAS_LEVEL_TEXT = 2048 /**< Include level text string [no] */ }; /** * Write log message. * This is the main macro used to write text to the logging backend. * * @param level The logging verbosity level. Lower number indicates higher * importance, with level zero indicates fatal error. Only * numeral argument is permitted (e.g. not variable). * @param arg Enclosed 'printf' like arguments, with the first * argument is the sender, the second argument is format * string and the following arguments are variable number of * arguments suitable for the format string. * * Sample: * \verbatim PJ_LOG(2, (__FILE__, "current value is %d", value)); \endverbatim * @hideinitializer */ #define PJ_LOG(level,arg) do { \ if (level <= pj_log_get_level()) \ pj_log_wrapper_##level(arg); \ } while (0) /** * Signature for function to be registered to the logging subsystem to * write the actual log message to some output device. * * @param level Log level. * @param data Log message, which will be NULL terminated. * @param len Message length. */ typedef void pj_log_func(int level, const char *data, int len); /** * Default logging writer function used by front end logger function. * This function will print the log message to stdout only. * Application normally should NOT need to call this function, but * rather use the PJ_LOG macro. * * @param level Log level. * @param buffer Log message. * @param len Message length. */ PJ_DECL(void) pj_log_write(int level, const char *buffer, int len); #if PJ_LOG_MAX_LEVEL >= 1 /** * Write to log. * * @param sender Source of the message. * @param level Verbosity level. * @param format Format. * @param marker Marker. */ PJ_DECL(void) pj_log(const char *sender, int level, const char *format, va_list marker); /** * Change log output function. The front-end logging functions will call * this function to write the actual message to the desired device. * By default, the front-end functions use pj_log_write() to write * the messages, unless it's changed by calling this function. * * @param func The function that will be called to write the log * messages to the desired device. */ PJ_DECL(void) pj_log_set_log_func( pj_log_func *func ); /** * Get the current log output function that is used to write log messages. * * @return Current log output function. */ PJ_DECL(pj_log_func*) pj_log_get_log_func(void); /** * Set maximum log level. Application can call this function to set * the desired level of verbosity of the logging messages. The bigger the * value, the more verbose the logging messages will be printed. However, * the maximum level of verbosity can not exceed compile time value of * PJ_LOG_MAX_LEVEL. * * @param level The maximum level of verbosity of the logging * messages (6=very detailed..1=error only, 0=disabled) */ PJ_DECL(void) pj_log_set_level(int level); /** * Get current maximum log verbositylevel. * * @return Current log maximum level. */ #if 1 PJ_DECL(int) pj_log_get_level(void); #else PJ_DECL_DATA(int) pj_log_max_level; #define pj_log_get_level() pj_log_max_level #endif /** * Set log decoration. The log decoration flag controls what are printed * to output device alongside the actual message. For example, application * can specify that date/time information should be displayed with each * log message. * * @param decor Bitmask combination of #pj_log_decoration to control * the layout of the log message. */ PJ_DECL(void) pj_log_set_decor(unsigned decor); /** * Get current log decoration flag. * * @return Log decoration flag. */ PJ_DECL(unsigned) pj_log_get_decor(void); /** * Set color of log messages. * * @param level Log level which color will be changed. * @param color Desired color. */ PJ_DECL(void) pj_log_set_color(int level, pj_color_t color); /** * Get color of log messages. * * @param level Log level which color will be returned. * @return Log color. */ PJ_DECL(pj_color_t) pj_log_get_color(int level); #else /* #if PJ_LOG_MAX_LEVEL >= 1 */ /** * Change log output function. The front-end logging functions will call * this function to write the actual message to the desired device. * By default, the front-end functions use pj_log_write() to write * the messages, unless it's changed by calling this function. * * @param func The function that will be called to write the log * messages to the desired device. */ # define pj_log_set_log_func(func) /** * Set maximum log level. Application can call this function to set * the desired level of verbosity of the logging messages. The bigger the * value, the more verbose the logging messages will be printed. However, * the maximum level of verbosity can not exceed compile time value of * PJ_LOG_MAX_LEVEL. * * @param level The maximum level of verbosity of the logging * messages (6=very detailed..1=error only, 0=disabled) */ # define pj_log_set_level(level) /** * Set log decoration. The log decoration flag controls what are printed * to output device alongside the actual message. For example, application * can specify that date/time information should be displayed with each * log message. * * @param decor Bitmask combination of #pj_log_decoration to control * the layout of the log message. */ # define pj_log_set_decor(decor) /** * Set color of log messages. * * @param level Log level which color will be changed. * @param color Desired color. */ # define pj_log_set_color(level, color) /** * Get current maximum log verbositylevel. * * @return Current log maximum level. */ # define pj_log_get_level() 0 /** * Get current log decoration flag. * * @return Log decoration flag. */ # define pj_log_get_decor() 0 /** * Get color of log messages. * * @param level Log level which color will be returned. * @return Log color. */ # define pj_log_get_color(level) 0 #endif /* #if PJ_LOG_MAX_LEVEL >= 1 */ /** * @} */ /* **************************************************************************/ /* * Log functions implementation prototypes. * These functions are called by PJ_LOG macros according to verbosity * level specified when calling the macro. Applications should not normally * need to call these functions directly. */ /** * @def pj_log_wrapper_1(arg) * Internal function to write log with verbosity 1. Will evaluate to * empty expression if PJ_LOG_MAX_LEVEL is below 1. * @param arg Log expression. */ #if PJ_LOG_MAX_LEVEL >= 1 #define pj_log_wrapper_1(arg) pj_log_1 arg /** Internal function. */ PJ_DECL(void) pj_log_1(const char *src, const char *format, ...); #else #define pj_log_wrapper_1(arg) #endif /** * @def pj_log_wrapper_2(arg) * Internal function to write log with verbosity 2. Will evaluate to * empty expression if PJ_LOG_MAX_LEVEL is below 2. * @param arg Log expression. */ #if PJ_LOG_MAX_LEVEL >= 2 #define pj_log_wrapper_2(arg) pj_log_2 arg /** Internal function. */ PJ_DECL(void) pj_log_2(const char *src, const char *format, ...); #else #define pj_log_wrapper_2(arg) #endif /** * @def pj_log_wrapper_3(arg) * Internal function to write log with verbosity 3. Will evaluate to * empty expression if PJ_LOG_MAX_LEVEL is below 3. * @param arg Log expression. */ #if PJ_LOG_MAX_LEVEL >= 3 #define pj_log_wrapper_3(arg) pj_log_3 arg /** Internal function. */ PJ_DECL(void) pj_log_3(const char *src, const char *format, ...); #else #define pj_log_wrapper_3(arg) #endif /** * @def pj_log_wrapper_4(arg) * Internal function to write log with verbosity 4. Will evaluate to * empty expression if PJ_LOG_MAX_LEVEL is below 4. * @param arg Log expression. */ #if PJ_LOG_MAX_LEVEL >= 4 #define pj_log_wrapper_4(arg) pj_log_4 arg /** Internal function. */ PJ_DECL(void) pj_log_4(const char *src, const char *format, ...); #else #define pj_log_wrapper_4(arg) #endif /** * @def pj_log_wrapper_5(arg) * Internal function to write log with verbosity 5. Will evaluate to * empty expression if PJ_LOG_MAX_LEVEL is below 5. * @param arg Log expression. */ #if PJ_LOG_MAX_LEVEL >= 5 #define pj_log_wrapper_5(arg) pj_log_5 arg /** Internal function. */ PJ_DECL(void) pj_log_5(const char *src, const char *format, ...); #else #define pj_log_wrapper_5(arg) #endif /** * @def pj_log_wrapper_6(arg) * Internal function to write log with verbosity 6. Will evaluate to * empty expression if PJ_LOG_MAX_LEVEL is below 6. * @param arg Log expression. */ #if PJ_LOG_MAX_LEVEL >= 6 #define pj_log_wrapper_6(arg) pj_log_6 arg /** Internal function. */ PJ_DECL(void) pj_log_6(const char *src, const char *format, ...); #else #define pj_log_wrapper_6(arg) #endif PJ_END_DECL #endif /* __PJ_LOG_H__ */