--- /dev/null
+/* $Id$ */
+
+/* log - a generic logging facility in the spirit of log4j */
+
+/* Authors: Martin Quinson */
+/* Copyright (C) 2003, 2004 Martin Quinson. */
+
+/* This program is free software; you can redistribute it and/or modify it
+ under the terms of the license (GNU LGPL) which comes with this package. */
+
+/* GRAS_LOG_MAYDAY: define this to replace the logging facilities with basic
+ printf function. Useful to debug the logging facilities themselves */
+#undef GRAS_LOG_MAYDAY
+//#define GRAS_LOG_MAYDAY
+
+
+#ifndef _GRAS_LOG_H_
+#define _GRAS_LOG_H_
+
+#include <stdarg.h>
+
+/**
+ * gras_log_priority_t:
+ * @gras_log_priority_none: used internally (don't poke with)
+ * @gras_log_priority_debug: crufty output
+ * @gras_log_priority_verbose: verbose output for the user wanting more
+ * @gras_log_priority_info: output about the regular functionning
+ * @gras_log_priority_warning: minor issue encountered
+ * @gras_log_priority_error: issue encountered
+ * @gras_log_priority_critical: major issue encountered
+ * @gras_log_priority_infinite: value for GRAS_LOG_STATIC_THRESHOLD to not log
+ * @gras_log_priority_uninitialized: used internally (don't poke with)
+ *
+ * The different existing priorities.
+ */
+typedef enum {
+ gras_log_priority_none = 0,
+ gras_log_priority_debug = 1,
+ gras_log_priority_verbose = 2,
+ gras_log_priority_info = 3,
+ gras_log_priority_warning = 4,
+ gras_log_priority_error = 5,
+ gras_log_priority_critical = 6,
+
+ gras_log_priority_infinite = 7,
+
+ gras_log_priority_uninitialized = -1
+} gras_log_priority_t;
+
+
+/**
+ * GRAS_LOG_STATIC_THRESHOLD:
+ *
+ * All logging with priority < GRAS_LOG_STATIC_THRESHOLD is disabled at
+ * compile time, i.e., compiled out.
+ */
+#ifndef GRAS_LOG_STATIC_THRESHOLD
+# define GRAS_LOG_STATIC_THRESHOLD gras_log_priority_none
+#endif
+
+
+/* Transforms a category name to a global variable name. */
+#define _GRAS_LOGV(cat) _GRAS_LOG_CONCAT(_gras_this_log_category_does_not_exist__, cat)
+#define _GRAS_LOG_CONCAT(x,y) x ## y
+
+/* The root of the category hierarchy. */
+#define GRAS_LOG_ROOT_CAT root
+
+/**
+ * GRAS_LOG_NEW_SUBCATEGORY:
+ * @catName: name of new category
+ * @parent: father of the new category in the tree
+ *
+ * Defines a new subcategory of the parent.
+ */
+#define GRAS_LOG_NEW_SUBCATEGORY(catName, parent) \
+ extern gras_log_category_t _GRAS_LOGV(parent); \
+ gras_log_category_t _GRAS_LOGV(catName) = { \
+ &_GRAS_LOGV(parent), 0, 0, \
+ #catName, gras_log_priority_uninitialized, 1, \
+ 0, 1 \
+ };
+
+/**
+ * GRAS_LOG_NEW_CATEGORY:
+ * @catName: name of new category
+ *
+ * Creates a new subcategory of the root category.
+ */
+#define GRAS_LOG_NEW_CATEGORY(catName) GRAS_LOG_NEW_SUBCATEGORY(catName, GRAS_LOG_ROOT_CAT)
+
+/**
+ * GRAS_LOG_DEFAULT_CATEGORY:
+ * @cname: name of the cat
+ *
+ * Indicates which category is the default one.
+ */
+
+#ifdef GRAS_LOG_MAYDAY /* debuging the logs themselves */
+# define GRAS_LOG_DEFAULT_CATEGORY(cname)
+#else
+# define GRAS_LOG_DEFAULT_CATEGORY(cname) \
+ static gras_log_category_t* _GRAS_LOGV(default) = &_GRAS_LOGV(cname)
+#endif
+
+/**
+ * GRAS_LOG_NEW_DEFAULT_CATEGORY:
+ * @cname: name of the cat
+ *
+ * Creates a new subcategory of the root category and makes it the default
+ * (used by macros that don't explicitly specify a category).
+ */
+#define GRAS_LOG_NEW_DEFAULT_CATEGORY(cname) \
+ GRAS_LOG_NEW_CATEGORY(cname) \
+ GRAS_LOG_DEFAULT_CATEGORY(cname)
+
+/**
+ * GRAS_LOG_NEW_DEFAULT_SUBCATEGORY:
+ * @cname: name of the cat
+ * @parent: name of the parent
+ *
+ * Creates a new subcategory of the parent category and makes it the default
+ * (used by macros that don't explicitly specify a category).
+ */
+#define GRAS_LOG_NEW_DEFAULT_SUBCATEGORY(cname, parent) \
+ GRAS_LOG_NEW_SUBCATEGORY(cname, parent) \
+ GRAS_LOG_DEFAULT_CATEGORY(cname)
+
+/**
+ * GRAS_LOG_EXTERNAL_CATEGORY:
+ * @cname: name of the cat
+ *
+ * Indicates that a category you'll use in this file (to get subcategories of it,
+ * for example) really lives in another file.
+ */
+
+#define GRAS_LOG_EXTERNAL_CATEGORY(cname) \
+ extern gras_log_category_t _GRAS_LOGV(cname)
+
+// Functions you may call
+
+extern gras_error_t gras_log_control_set(const char* cs);
+
+// Forward declarations
+typedef struct gras_log_appender_s gras_log_appender_t;
+typedef struct gras_log_event_s gras_log_event_t;
+typedef struct gras_log_category_s gras_log_category_t;
+
+/**
+ * Do NOT access any members of this structure directly.
+ */
+struct gras_log_category_s {
+ gras_log_category_t *parent;
+ gras_log_category_t *firstChild, *nextSibling;
+ const char *name;
+ int threshold;
+ int isThreshInherited;
+ gras_log_appender_t *appender;
+ int willLogToParent;
+ // TODO: Formats?
+};
+
+struct gras_log_appender_s {
+ void (*do_append) (gras_log_appender_t* thisLogAppender,
+ gras_log_event_t* event);
+ void *appender_data;
+};
+
+struct gras_log_event_s {
+ gras_log_category_t* cat;
+ gras_log_priority_t priority;
+ const char* fileName;
+ const char* functionName;
+ int lineNum;
+ const char* fmt;
+ va_list ap;
+};
+
+/**
+ * gras_log_threshold_set:
+ * @cat: the category (not only its name, but the variable)
+ * @thresholdPriority: the priority
+ *
+ * Programatically alters a category's threshold priority (don't use).
+ */
+extern void gras_log_threshold_set(gras_log_category_t* cat,
+ gras_log_priority_t thresholdPriority);
+
+/**
+ * gras_log_parent_set:
+ * @cat: the category (not only its name, but the variable)
+ * @parent: the parent cat
+ *
+ * Programatically alter a category's parent (don't use).
+ */
+extern void gras_log_parent_set(gras_log_category_t* cat,
+ gras_log_category_t* parent);
+
+/**
+ * gras_log_appender_set:
+ * @cat: the category (not only its name, but the variable)
+ * @app: the appender
+ *
+ * Programatically sets the category's appender (don't use).
+ */
+extern void gras_log_appender_set(gras_log_category_t* cat,
+ gras_log_appender_t* app);
+
+// Functions that you shouldn't call.
+extern void _gras_log_event_log(gras_log_event_t*ev,
+ ...);
+extern int _gras_log_cat_init(gras_log_priority_t priority,
+ gras_log_category_t* category);
+
+
+extern gras_log_category_t _GRAS_LOGV(GRAS_LOG_ROOT_CAT);
+GRAS_LOG_EXTERNAL_CATEGORY(GRAS);
+extern gras_log_appender_t *gras_log_default_appender;
+
+/**
+ * GRAS_LOG_ISENABLED:
+ * @catName: name of the category
+ * @priority: minimal priority to be enabled to return true
+ *
+ * Returns true if the given priority is enabled for the category.
+ * If you have expensive expressions that are computed outside of the log
+ * command and used only within it, you should make its evaluation conditional
+ * using this macro.
+ */
+#define GRAS_LOG_ISENABLED(catName, priority) \
+ _GRAS_LOG_ISENABLEDV(_GRAS_LOGV(catName), priority)
+
+/*
+ * Helper function that implements GRAS_LOG_ISENABLED.
+ *
+ * NOTES
+ * First part is a compile-time constant.
+ * Call to _log_initCat only happens once.
+ */
+#define _GRAS_LOG_ISENABLEDV(catv, priority) \
+ (priority >= GRAS_LOG_STATIC_THRESHOLD \
+ && priority >= catv.threshold \
+ && (catv.threshold != gras_log_priority_uninitialized \
+ || _gras_log_cat_init(priority, &catv)) )
+
+/*
+ * Internal Macros
+ * Some kludge macros to ease maintenance. See how they're used below.
+ *
+ * IMPLEMENTATION NOTE: To reduce the parameter passing overhead of an enabled
+ * message, the many parameters passed to the logging function are packed in a
+ * structure. Since these values will be usually be passed to at least 3
+ * functions, this is a win.
+ * It also allows adding new values (such as a timestamp) without breaking
+ * code.
+ * Setting the LogEvent's valist member is done inside _log_logEvent.
+ */
+
+#define _GRAS_LOG_PRE(catv, priority, fmt) do { \
+ if (_GRAS_LOG_ISENABLEDV(catv, priority)) { \
+ gras_log_event_t _log_ev = \
+ {&(catv),priority,__FILE__,__FUNCTION__,__LINE__,fmt}; \
+ _gras_log_event_log(&_log_ev
+#define _GRAS_LOG_POST \
+ ); \
+ } } while(0)
+
+
+/* Logging Macros */
+
+#ifdef GRAS_LOG_MAYDAY
+# define CLOG0(c, p, f) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__)
+# define CLOG1(c, p, f,a1) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1)
+# define CLOG2(c, p, f,a1,a2) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2)
+# define CLOG3(c, p, f,a1,a2,a3) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2,a3)
+# define CLOG4(c, p, f,a1,a2,a3,a4) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2,a3,a4)
+# define CLOG5(c, p, f,a1,a2,a3,a4,a5) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2,a3,a4,a5)
+# define CLOG6(c, p, f,a1,a2,a3,a4,a5,a6) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2,a3,a4,a5,a6)
+#else
+# define CLOG0(c, p, f) _GRAS_LOG_PRE(_GRAS_LOGV(c),p,f) _GRAS_LOG_POST
+# define CLOG1(c, p, f,a1) _GRAS_LOG_PRE(_GRAS_LOGV(c),p,f) ,a1 _GRAS_LOG_POST
+# define CLOG2(c, p, f,a1,a2) _GRAS_LOG_PRE(_GRAS_LOGV(c),p,f) ,a1,a2 _GRAS_LOG_POST
+# define CLOG3(c, p, f,a1,a2,a3) _GRAS_LOG_PRE(_GRAS_LOGV(c),p,f) ,a1,a2,a3 _GRAS_LOG_POST
+# define CLOG4(c, p, f,a1,a2,a3,a4) _GRAS_LOG_PRE(_GRAS_LOGV(c),p,f) ,a1,a2,a3,a4 _GRAS_LOG_POST
+# define CLOG5(c, p, f,a1,a2,a3,a4,a5) _GRAS_LOG_PRE(_GRAS_LOGV(c),p,f) ,a1,a2,a3,a4,a5 _GRAS_LOG_POST
+# define CLOG6(c, p, f,a1,a2,a3,a4,a5,a6) _GRAS_LOG_PRE(_GRAS_LOGV(c),p,f) ,a1,a2,a3,a4,a5,a6 _GRAS_LOG_POST
+#endif
+
+#define CDEBUG0(c, f) CLOG0(c, gras_log_priority_debug, f)
+#define CDEBUG1(c, f,a1) CLOG1(c, gras_log_priority_debug, f,a1)
+#define CDEBUG2(c, f,a1,a2) CLOG2(c, gras_log_priority_debug, f,a1,a2)
+#define CDEBUG3(c, f,a1,a2,a3) CLOG3(c, gras_log_priority_debug, f,a1,a2,a3)
+#define CDEBUG4(c, f,a1,a2,a3,a4) CLOG4(c, gras_log_priority_debug, f,a1,a2,a3,a4)
+#define CDEBUG5(c, f,a1,a2,a3,a4,a5) CLOG5(c, gras_log_priority_debug, f,a1,a2,a3,a4,a5)
+#define CDEBUG6(c, f,a1,a2,a3,a4,a5,a6) CLOG6(c, gras_log_priority_debug, f,a1,a2,a3,a4,a5,a6)
+
+#define CVERB0(c, f) CLOG0(c, gras_log_priority_verbose, f)
+#define CVERB1(c, f,a1) CLOG1(c, gras_log_priority_verbose, f,a1)
+#define CVERB2(c, f,a1,a2) CLOG2(c, gras_log_priority_verbose, f,a1,a2)
+#define CVERB3(c, f,a1,a2,a3) CLOG3(c, gras_log_priority_verbose, f,a1,a2,a3)
+#define CVERB4(c, f,a1,a2,a3,a4) CLOG4(c, gras_log_priority_verbose, f,a1,a2,a3,a4)
+#define CVERB5(c, f,a1,a2,a3,a4,a5) CLOG5(c, gras_log_priority_verbose, f,a1,a2,a3,a4,a5)
+#define CVERB6(c, f,a1,a2,a3,a4,a5,a6) CLOG6(c, gras_log_priority_verbose, f,a1,a2,a3,a4,a5,a6)
+
+#define CINFO0(c, f) CLOG0(c, gras_log_priority_info, f)
+#define CINFO1(c, f,a1) CLOG1(c, gras_log_priority_info, f,a1)
+#define CINFO2(c, f,a1,a2) CLOG2(c, gras_log_priority_info, f,a1,a2)
+#define CINFO3(c, f,a1,a2,a3) CLOG3(c, gras_log_priority_info, f,a1,a2,a3)
+#define CINFO4(c, f,a1,a2,a3,a4) CLOG4(c, gras_log_priority_info, f,a1,a2,a3,a4)
+#define CINFO5(c, f,a1,a2,a3,a4,a5) CLOG5(c, gras_log_priority_info, f,a1,a2,a3,a4,a5)
+#define CINFO6(c, f,a1,a2,a3,a4,a5,a6) CLOG6(c, gras_log_priority_info, f,a1,a2,a3,a4,a5,a6)
+
+#define CWARNING0(c, f) CLOG0(c, gras_log_priority_warning, f)
+#define CWARNING1(c, f,a1) CLOG1(c, gras_log_priority_warning, f,a1)
+#define CWARNING2(c, f,a1,a2) CLOG2(c, gras_log_priority_warning, f,a1,a2)
+#define CWARNING3(c, f,a1,a2,a3) CLOG3(c, gras_log_priority_warning, f,a1,a2,a3)
+#define CWARNING4(c, f,a1,a2,a3,a4) CLOG4(c, gras_log_priority_warning, f,a1,a2,a3,a4)
+#define CWARNING5(c, f,a1,a2,a3,a4,a5) CLOG5(c, gras_log_priority_warning, f,a1,a2,a3,a4,a5)
+#define CWARNING6(c, f,a1,a2,a3,a4,a5,a6) CLOG6(c, gras_log_priority_warning, f,a1,a2,a3,a4,a5,a6)
+
+#define CERROR0(c, f) CLOG0(c, gras_log_priority_error, f)
+#define CERROR1(c, f,a1) CLOG1(c, gras_log_priority_error, f,a1)
+#define CERROR2(c, f,a1,a2) CLOG2(c, gras_log_priority_error, f,a1,a2)
+#define CERROR3(c, f,a1,a2,a3) CLOG3(c, gras_log_priority_error, f,a1,a2,a3)
+#define CERROR4(c, f,a1,a2,a3,a4) CLOG4(c, gras_log_priority_error, f,a1,a2,a3,a4)
+#define CERROR5(c, f,a1,a2,a3,a4,a5) CLOG5(c, gras_log_priority_error, f,a1,a2,a3,a4,a5)
+#define CERROR6(c, f,a1,a2,a3,a4,a5,a6) CLOG6(c, gras_log_priority_error, f,a1,a2,a3,a4,a5,a6)
+
+/**
+ * CCRITICAL6:
+ * @c: the category to log into
+ * @f: the format string
+ * @a1: first argument of the format
+ * @a2: second argument of the format
+ * @a3: third argument of the format
+ * @a4: fourth argument of the format
+ * @a5: fifth argument of the format
+ * @a6: sixth argument of the format
+ *
+ * Log something to the current default category under the warning priority.
+ *
+ * The macros CCRITICAL0 ... CCRITICAL5 naturally also exist, but are not listed here
+ * for sake of clarity. They just differ in the number of arguments passed
+ * along with the format string.
+ */
+
+#define CCRITICAL0(c, f) CLOG0(c, gras_log_priority_critical, f)
+#define CCRITICAL1(c, f,a1) CLOG1(c, gras_log_priority_critical, f,a1)
+#define CCRITICAL2(c, f,a1,a2) CLOG2(c, gras_log_priority_critical, f,a1,a2)
+#define CCRITICAL3(c, f,a1,a2,a3) CLOG3(c, gras_log_priority_critical, f,a1,a2,a3)
+#define CCRITICAL4(c, f,a1,a2,a3,a4) CLOG4(c, gras_log_priority_critical, f,a1,a2,a3,a4)
+#define CCRITICAL5(c, f,a1,a2,a3,a4,a5) CLOG5(c, gras_log_priority_critical, f,a1,a2,a3,a4,a5)
+#define CCRITICAL6(c, f,a1,a2,a3,a4,a5,a6) CLOG6(c, gras_log_priority_critical, f,a1,a2,a3,a4,a5,a6)
+
+#ifdef GRAS_LOG_MAYDAY
+# define LOG0(p, f) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__)
+# define LOG1(p, f,a1) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1)
+# define LOG2(p, f,a1,a2) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2)
+# define LOG3(p, f,a1,a2,a3) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2,a3)
+# define LOG4(p, f,a1,a2,a3,a4) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2,a3,a4)
+# define LOG5(p, f,a1,a2,a3,a4,a5) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2,a3,a4,a5)
+# define LOG6(p, f,a1,a2,a3,a4,a5,a6) fprintf(stderr,"%s:%d:" f "\n",__FILE__,__LINE__,a1,a2,a3,a4,a5,a6)
+#else
+# define LOG0(p, f) _GRAS_LOG_PRE((*_GRAS_LOGV(default)),p,f) _GRAS_LOG_POST
+# define LOG1(p, f,a1) _GRAS_LOG_PRE((*_GRAS_LOGV(default)),p,f) ,a1 _GRAS_LOG_POST
+# define LOG2(p, f,a1,a2) _GRAS_LOG_PRE((*_GRAS_LOGV(default)),p,f) ,a1,a2 _GRAS_LOG_POST
+# define LOG3(p, f,a1,a2,a3) _GRAS_LOG_PRE((*_GRAS_LOGV(default)),p,f) ,a1,a2,a3 _GRAS_LOG_POST
+# define LOG4(p, f,a1,a2,a3,a4) _GRAS_LOG_PRE((*_GRAS_LOGV(default)),p,f) ,a1,a2,a3,a4 _GRAS_LOG_POST
+# define LOG5(p, f,a1,a2,a3,a4,a5) _GRAS_LOG_PRE((*_GRAS_LOGV(default)),p,f) ,a1,a2,a3,a4,a5 _GRAS_LOG_POST
+# define LOG6(p, f,a1,a2,a3,a4,a5,a6) _GRAS_LOG_PRE((*_GRAS_LOGV(default)),p,f) ,a1,a2,a3,a4,a5,a6 _GRAS_LOG_POST
+#endif
+
+/**
+ * DEBUG6:
+ * @f: the format string
+ * @a1: first argument of the format
+ * @a2: second argument of the format
+ * @a3: third argument of the format
+ * @a4: fourth argument of the format
+ * @a5: fifth argument of the format
+ * @a6: sixth argument of the format
+ *
+ * Log something to the current default category under the debug priority.
+ *
+ * The macros DEBUG0 ... DEBUG5 naturally also exist, but are not listed here
+ * for sake of clarity. They just differ in the number of arguments passed
+ * along with the format string.
+ */
+
+#define DEBUG0(f) LOG0(gras_log_priority_debug, f)
+#define DEBUG1(f,a1) LOG1(gras_log_priority_debug, f,a1)
+#define DEBUG2(f,a1,a2) LOG2(gras_log_priority_debug, f,a1,a2)
+#define DEBUG3(f,a1,a2,a3) LOG3(gras_log_priority_debug, f,a1,a2,a3)
+#define DEBUG4(f,a1,a2,a3,a4) LOG4(gras_log_priority_debug, f,a1,a2,a3,a4)
+#define DEBUG5(f,a1,a2,a3,a4,a5) LOG5(gras_log_priority_debug, f,a1,a2,a3,a4,a5)
+#define DEBUG6(f,a1,a2,a3,a4,a5,a6) LOG6(gras_log_priority_debug, f,a1,a2,a3,a4,a5,a6)
+
+/**
+ * VERB6:
+ * @f: the format string
+ * @a1: first argument of the format
+ * @a2: second argument of the format
+ * @a3: third argument of the format
+ * @a4: fourth argument of the format
+ * @a5: fifth argument of the format
+ * @a6: sixth argument of the format
+ *
+ * Log something to the current default category under the verbose priority.
+ *
+ * The macros VERB0 ... VERB5 naturally also exist, but are not listed here
+ * for sake of clarity. They just differ in the number of arguments passed
+ * along with the format string.
+ */
+
+#define VERB0(f) LOG0(gras_log_priority_verbose, f)
+#define VERB1(f,a1) LOG1(gras_log_priority_verbose, f,a1)
+#define VERB2(f,a1,a2) LOG2(gras_log_priority_verbose, f,a1,a2)
+#define VERB3(f,a1,a2,a3) LOG3(gras_log_priority_verbose, f,a1,a2,a3)
+#define VERB4(f,a1,a2,a3,a4) LOG4(gras_log_priority_verbose, f,a1,a2,a3,a4)
+#define VERB5(f,a1,a2,a3,a4,a5) LOG5(gras_log_priority_verbose, f,a1,a2,a3,a4,a5)
+#define VERB6(f,a1,a2,a3,a4,a5,a6) LOG6(gras_log_priority_verbose, f,a1,a2,a3,a4,a5,a6)
+
+/**
+ * INFO6:
+ * @f: the format string
+ * @a1: first argument of the format
+ * @a2: second argument of the format
+ * @a3: third argument of the format
+ * @a4: fourth argument of the format
+ * @a5: fifth argument of the format
+ * @a6: sixth argument of the format
+ *
+ * Log something to the current default category under the info priority.
+ *
+ * The macros INFO0 ... INFO5 naturally also exist, but are not listed here
+ * for sake of clarity. They just differ in the number of arguments passed
+ * along with the format string.
+ */
+
+#define INFO0(f) LOG0(gras_log_priority_info, f)
+#define INFO1(f,a1) LOG1(gras_log_priority_info, f,a1)
+#define INFO2(f,a1,a2) LOG2(gras_log_priority_info, f,a1,a2)
+#define INFO3(f,a1,a2,a3) LOG3(gras_log_priority_info, f,a1,a2,a3)
+#define INFO4(f,a1,a2,a3,a4) LOG4(gras_log_priority_info, f,a1,a2,a3,a4)
+#define INFO5(f,a1,a2,a3,a4,a5) LOG5(gras_log_priority_info, f,a1,a2,a3,a4,a5)
+#define INFO6(f,a1,a2,a3,a4,a5,a6) LOG6(gras_log_priority_info, f,a1,a2,a3,a4,a5,a6)
+
+/**
+ * WARNING6:
+ * @f: the format string
+ * @a1: first argument of the format
+ * @a2: second argument of the format
+ * @a3: third argument of the format
+ * @a4: fourth argument of the format
+ * @a5: fifth argument of the format
+ * @a6: sixth argument of the format
+ *
+ * Log something to the current default category under the warning priority.
+ *
+ * The macros WARNING0 ... WARNING5 naturally also exist, but are not listed here
+ * for sake of clarity. They just differ in the number of arguments passed
+ * along with the format string.
+ */
+
+#define WARNING0(f) LOG0(gras_log_priority_warning, f)
+#define WARNING1(f,a1) LOG1(gras_log_priority_warning, f,a1)
+#define WARNING2(f,a1,a2) LOG2(gras_log_priority_warning, f,a1,a2)
+#define WARNING3(f,a1,a2,a3) LOG3(gras_log_priority_warning, f,a1,a2,a3)
+#define WARNING4(f,a1,a2,a3,a4) LOG4(gras_log_priority_warning, f,a1,a2,a3,a4)
+#define WARNING5(f,a1,a2,a3,a4,a5) LOG5(gras_log_priority_warning, f,a1,a2,a3,a4,a5)
+#define WARNING6(f,a1,a2,a3,a4,a5,a6) LOG6(gras_log_priority_warning, f,a1,a2,a3,a4,a5,a6)
+
+/**
+ * ERROR6:
+ * @f: the format string
+ * @a1: first argument of the format
+ * @a2: second argument of the format
+ * @a3: third argument of the format
+ * @a4: fourth argument of the format
+ * @a5: fifth argument of the format
+ * @a6: sixth argument of the format
+ *
+ * Log something to the current default category under the error priority.
+ *
+ * The macros ERROR0 ... ERROR5 naturally also exist, but are not listed here
+ * for sake of clarity. They just differ in the number of arguments passed
+ * along with the format string.
+ */
+
+#define ERROR0(f) LOG0(gras_log_priority_error, f)
+#define ERROR1(f,a1) LOG1(gras_log_priority_error, f,a1)
+#define ERROR2(f,a1,a2) LOG2(gras_log_priority_error, f,a1,a2)
+#define ERROR3(f,a1,a2,a3) LOG3(gras_log_priority_error, f,a1,a2,a3)
+#define ERROR4(f,a1,a2,a3,a4) LOG4(gras_log_priority_error, f,a1,a2,a3,a4)
+#define ERROR5(f,a1,a2,a3,a4,a5) LOG5(gras_log_priority_error, f,a1,a2,a3,a4,a5)
+#define ERROR6(f,a1,a2,a3,a4,a5,a6) LOG6(gras_log_priority_error, f,a1,a2,a3,a4,a5,a6)
+
+/**
+ * CRITICAL6:
+ * @f: the format string
+ * @a1: first argument of the format
+ * @a2: second argument of the format
+ * @a3: third argument of the format
+ * @a4: fourth argument of the format
+ * @a5: fifth argument of the format
+ * @a6: sixth argument of the format
+ *
+ * Log something to the current default category under the critical priority.
+ *
+ * The macros CRITICAL0 ... CRITICAL5 naturally also exist, but are not listed here
+ * for sake of clarity. They just differ in the number of arguments passed
+ * along with the format string.
+ */
+#define CRITICAL0(f) LOG0(gras_log_priority_critical, f)
+#define CRITICAL1(f,a1) LOG1(gras_log_priority_critical, f,a1)
+#define CRITICAL2(f,a1,a2) LOG2(gras_log_priority_critical, f,a1,a2)
+#define CRITICAL3(f,a1,a2,a3) LOG3(gras_log_priority_critical, f,a1,a2,a3)
+#define CRITICAL4(f,a1,a2,a3,a4) LOG4(gras_log_priority_critical, f,a1,a2,a3,a4)
+#define CRITICAL5(f,a1,a2,a3,a4,a5) LOG5(gras_log_priority_critical, f,a1,a2,a3,a4,a5)
+#define CRITICAL6(f,a1,a2,a3,a4,a5,a6) LOG6(gras_log_priority_critical, f,a1,a2,a3,a4,a5,a6)
+
+#define GRAS_IN DEBUG0(">> begin of function")
+#define GRAS_OUT DEBUG0("<< end of function")
+
+#endif /* ! _GRAS_LOG_H_ */
