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category.h(3) log4c category.h(3)

NAME

category.h -
central class in the log4c package.

SYNOPSIS

#include <stdio.h>
 
#include <stdarg.h>
 
#include <log4c/defs.h>
 
#include <log4c/priority.h>
 
#include <log4c/location_info.h>
 

Defines


#define log4c_category_define(a_category, a_name)
 

Typedefs


typedef struct __log4c_category log4c_category_t
 

Functions


LOG4C_API log4c_category_t * log4c_category_get (const char *a_name)
 
LOG4C_API int log4c_category_list (log4c_category_t **a_cats, int a_ncats)
 
LOG4C_API log4c_category_t * log4c_category_new (const char *a_name)
 
LOG4C_API void log4c_category_delete (log4c_category_t *a_category)
 
LOG4C_API const char * log4c_category_get_name (const log4c_category_t *a_category)
 
LOG4C_API struct __log4c_appender * log4c_category_get_appender (const log4c_category_t *a_category)
 
LOG4C_API int log4c_category_get_additivity (const log4c_category_t *a_category)
 
LOG4C_API int log4c_category_get_priority (const log4c_category_t *a_category)
 
LOG4C_API int log4c_category_get_chainedpriority (const log4c_category_t *a_category)
 
LOG4C_API struct __log4c_appender * log4c_category_set_appender (log4c_category_t *a_category, struct __log4c_appender *a_appender)
 
LOG4C_API int log4c_category_set_priority (log4c_category_t *a_category, int a_priority)
 
LOG4C_API int log4c_category_set_additivity (log4c_category_t *a_category, int a_additivity)
 
LOG4C_API void log4c_category_print (const log4c_category_t *a_category, FILE *a_stream)
 
static int log4c_category_is_priority_enabled (const log4c_category_t *a_category, int a_priority)
 
static int log4c_category_is_fatal_enabled (const log4c_category_t *a_category)
 
static int log4c_category_is_alert_enabled (const log4c_category_t *a_category)
 
static int log4c_category_is_crit_enabled (const log4c_category_t *a_category)
 
static int log4c_category_is_error_enabled (const log4c_category_t *a_category)
 
static int log4c_category_is_warn_enabled (const log4c_category_t *a_category)
 
static int log4c_category_is_notice_enabled (const log4c_category_t *a_category)
 
static int log4c_category_is_info_enabled (const log4c_category_t *a_category)
 
static int log4c_category_is_debug_enabled (const log4c_category_t *a_category)
 
static int log4c_category_is_trace_enabled (const log4c_category_t *a_category)
 
static LOG4C_INLINE void log4c_category_log (const log4c_category_t *a_category, int a_priority, const char *a_format,...)
 
static LOG4C_INLINE void log4c_category_log_locinfo (const log4c_category_t *a_category, const log4c_location_info_t *a_locinfo, int a_priority, const char *a_format,...)
 
static LOG4C_INLINE void log4c_category_fatal (const log4c_category_t *a_category, const char *a_format,...)
 
static LOG4C_INLINE void log4c_category_alert (const log4c_category_t *a_category, const char *a_format,...)
 
static LOG4C_INLINE void log4c_category_crit (const log4c_category_t *a_category, const char *a_format,...)
 
static LOG4C_INLINE void log4c_category_error (const log4c_category_t *a_category, const char *a_format,...)
 
static LOG4C_INLINE void log4c_category_warn (const log4c_category_t *a_category, const char *a_format,...)
 
static LOG4C_INLINE void log4c_category_notice (const log4c_category_t *a_category, const char *a_format,...)
 
static LOG4C_INLINE void log4c_category_info (const log4c_category_t *a_category, const char *a_format,...)
 
static LOG4C_INLINE void log4c_category_debug (const log4c_category_t *a_category, const char *a_format,...)
 
static LOG4C_INLINE void __log4c_category_trace (const log4c_category_t *a_category, const char *a_format,...)
 

Detailed Description

central class in the log4c package.
One of the distintive features of log4j (and hence log4c) are hierarchical categories and their evaluation.

Define Documentation

#define log4c_category_define(a_category, a_name) Helper macro to define static categories.

Parameters:
a_category the log4c_category_t pointer name
 
a_name the category name

Typedef Documentation

typedef struct __log4c_category log4c_category_t log4c category class

Function Documentation

static LOG4C_INLINE void __log4c_category_trace (const log4c_category_t *a_category, const char *a_format, ...) [static] Log a message with trace priority.

Parameters:
a_category the log4c_category_t object
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_TRACE.

static LOG4C_INLINE void log4c_category_alert (const log4c_category_t *a_category, const char *a_format, ...) [static] Log a message with alert priority.

Parameters:
a_category the log4c_category_t object
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_ALERT.

static LOG4C_INLINE void log4c_category_crit (const log4c_category_t *a_category, const char *a_format, ...) [static] Log a message with crit priority.

Parameters:
a_category the log4c_category_t object
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_CRIT.

static LOG4C_INLINE void log4c_category_debug (const log4c_category_t *a_category, const char *a_format, ...) [static] Log a message with debug priority.

Parameters:
a_category the log4c_category_t object
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_DEBUG.

LOG4C_API void log4c_category_delete ( log4c_category_t *a_category) Destructor for a log4c_category_t.

Parameters:
a_category the log4c_category_t object

static LOG4C_INLINE void log4c_category_error (const log4c_category_t *a_category, const char *a_format, ...) [static] Log a message with error priority.

Parameters:
a_category the log4c_category_t object
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_ERROR.

static LOG4C_INLINE void log4c_category_fatal (const log4c_category_t *a_category, const char *a_format, ...) [static] Log a message with fatal priority.

Parameters:
a_category the log4c_category_t object
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_FATAL.

LOG4C_API log4c_category_t* log4c_category_get (const char *a_name) Instantiate a log4c_category_t with name name. This method does not set priority of the category which is by default LOG4C_PRIORITY_NOTSET.

Parameters:
a_name The name of the category to retrieve.
Bug
the root category name should be '' not 'root'. *

LOG4C_API int log4c_category_get_additivity (const log4c_category_t *a_category) Get the additivity flag for this log4c_category_t..

Parameters:
a_category the log4c_category_t object
Returns:
the category additivity

LOG4C_API struct __log4c_appender* log4c_category_get_appender (const log4c_category_t *a_category) [read] Returns the Appender for this log4c_category_t, or NULL if no Appender has been set.

Parameters:
a_category the log4c_category_t object
Returns:
The Appender.

LOG4C_API int log4c_category_get_chainedpriority (const log4c_category_t *a_category) Starting from this category, search the category hierarchy for a set priority and return it. Otherwise, return the priority of the root category.

Parameters:
a_category the log4c_category_t object
Todo
the log4c_category_t is designed so that this method executes as quickly as possible. It could even be faster if the set priority was propagated through the children hierarchy of a category.
References LOG4C_PRIORITY_NOTSET, and LOG4C_PRIORITY_UNKNOWN.

LOG4C_API const char* log4c_category_get_name (const log4c_category_t *a_category) Return the category name.

Parameters:
a_category the log4c_category_t object
Returns:
the category name.

LOG4C_API int log4c_category_get_priority (const log4c_category_t *a_category) Returns the assigned Priority, if any, for this log4c_category_t.

Parameters:
a_category the log4c_category_t object
Returns:
Priority - the assigned Priority, can be LOG4C_PRIORITY_NOTSET
References LOG4C_PRIORITY_UNKNOWN.

static LOG4C_INLINE void log4c_category_info (const log4c_category_t *a_category, const char *a_format, ...) [static] Log a message with info priority.

Parameters:
a_category the log4c_category_t object
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_INFO.

static int log4c_category_is_alert_enabled (const log4c_category_t *a_category) [inline, static] Return true if the category will log messages with priority LOG4C_PRIORITY_ALERT.

Parameters:
a_category the log4c_category_t object
Returns:
Whether the category will log.
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_ALERT.

static int log4c_category_is_crit_enabled (const log4c_category_t *a_category) [inline, static] Return true if the category will log messages with priority LOG4C_PRIORITY_CRIT.

Parameters:
a_category the log4c_category_t object
Returns:
Whether the category will log.
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_CRIT.

static int log4c_category_is_debug_enabled (const log4c_category_t *a_category) [inline, static] Return true if the category will log messages with priority LOG4C_PRIORITY_DEBUG.

Parameters:
a_category the log4c_category_t object
Returns:
Whether the category will log.
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_DEBUG.

static int log4c_category_is_error_enabled (const log4c_category_t *a_category) [inline, static] Return true if the category will log messages with priority LOG4C_PRIORITY_ERROR.

Parameters:
a_category the log4c_category_t object
Returns:
Whether the category will log.
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_ERROR.

static int log4c_category_is_fatal_enabled (const log4c_category_t *a_category) [inline, static] Return true if the category will log messages with priority LOG4C_PRIORITY_FATAL.

Parameters:
a_category the log4c_category_t object
Returns:
Whether the category will log.
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_FATAL.

static int log4c_category_is_info_enabled (const log4c_category_t *a_category) [inline, static] Return true if the category will log messages with priority LOG4C_PRIORITY_INFO.

Parameters:
a_category the log4c_category_t object
Returns:
Whether the category will log.
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_INFO.

static int log4c_category_is_notice_enabled (const log4c_category_t *a_category) [inline, static] Return true if the category will log messages with priority LOG4C_PRIORITY_NOTICE.

Parameters:
a_category the log4c_category_t object
Returns:
Whether the category will log.
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_NOTICE.

static int log4c_category_is_priority_enabled (const log4c_category_t *a_category, inta_priority) [inline, static] Returns true if the chained priority of the log4c_category_t is equal to or higher than given priority.

Parameters:
a_category the log4c_category_t object
 
a_priority The priority to compare with.
Returns:
whether logging is enable for this priority.

static int log4c_category_is_trace_enabled (const log4c_category_t *a_category) [inline, static] Return true if the category will log messages with priority LOG4C_PRIORITY_TRACE.

Parameters:
a_category the log4c_category_t object
Returns:
Whether the category will log.
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_TRACE.

static int log4c_category_is_warn_enabled (const log4c_category_t *a_category) [inline, static] Return true if the category will log messages with priority LOG4C_PRIORITY_WARN.

Parameters:
a_category the log4c_category_t object
Returns:
Whether the category will log.
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_WARN.

LOG4C_API int log4c_category_list ( log4c_category_t **a_cats, inta_ncats) Fill in an array with the log4c categories.

Parameters:
a_cats array of categories that will be filled
 
a_ncats number of categories in the array
Returns:
-1 if it fails or the number of available categories in log4c.

static LOG4C_INLINE void log4c_category_log (const log4c_category_t *a_category, inta_priority, const char *a_format, ...) [static] Log a message with the specified priority.

Parameters:
a_category the log4c_category_t object
 
a_priority The priority of this log message.
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled().

static LOG4C_INLINE void log4c_category_log_locinfo (const log4c_category_t *a_category, const log4c_location_info_t *a_locinfo, inta_priority, const char *a_format, ...) [static] Log a message with the specified priority and a user location info.

Parameters:
a_category the log4c_category_t object
 
a_locinfo a user location info
 
a_priority The priority of this log message.
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled().

LOG4C_API log4c_category_t* log4c_category_new (const char *a_name) Constructor for a log4c_category_t.

Parameters:
a_name the category name
Returns:
a log4c_category object
Warning:
this method should not be called directly. You should use the log4c_category_get() method in order to preserve the categories hierarchy.
References LOG4C_PRIORITY_NOTSET.

static LOG4C_INLINE void log4c_category_notice (const log4c_category_t *a_category, const char *a_format, ...) [static] Log a message with notice priority.

Parameters:
a_category the log4c_category_t object
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_NOTICE.

LOG4C_API void log4c_category_print (const log4c_category_t *a_category, FILE *a_stream) prints the log4c_category_t object on a stream

Parameters:
a_category the log4c_category_t object
 
a_stream The stream

LOG4C_API int log4c_category_set_additivity ( log4c_category_t *a_category, inta_additivity) Sets a new additivity flag for this category.

Parameters:
a_category the log4c_category_t object
 
a_additivity the new category additivity
Returns:
the previous category additivity

LOG4C_API struct __log4c_appender* log4c_category_set_appender ( log4c_category_t *this, log4c_appender_t *a_appender) [read] Sets a new appender for this category.

Parameters:
a_category the log4c_category_t object
 
a_appender the new category appender
Returns:
the previous category appender
Todo
need multiple appenders per category

LOG4C_API int log4c_category_set_priority ( log4c_category_t *a_category, inta_priority) Sets a new priority of this category.

Parameters:
a_category the log4c_category_t object
 
a_priority the new priority to set. Use LOG4C_PRIORITY_NOTSET to let the category use its parents priority as effective priority.
Returns:
the previous category priority
References LOG4C_PRIORITY_UNKNOWN.

static LOG4C_INLINE void log4c_category_warn (const log4c_category_t *a_category, const char *a_format, ...) [static] Log a message with warn priority.

Parameters:
a_category the log4c_category_t object
 
a_format Format specifier for the string to write in the log file.
 
... The arguments for a_format
References log4c_category_is_priority_enabled(), and LOG4C_PRIORITY_WARN.

Author

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Mon May 2 2011 Version 1.2.1