samba-mirror/lib/tevent/tevent_debug.c

/*
   Unix SMB/CIFS implementation.

   Copyright (C) Andrew Tridgell 2005
   Copyright (C) Jelmer Vernooij 2005

   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 3 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, see <http://www.gnu.org/licenses/>.
*/

#include "replace.h"
#include "events.h"
#include "events_internal.h"

/********************************************************************
 * Debug wrapper functions, modeled (with lot's of code copied as is)
 * after the ev debug wrapper functions
 ********************************************************************/

/*
  this allows the user to choose their own debug function
*/
int ev_set_debug(struct event_context *ev,
		 void (*debug)(void *context, enum ev_debug_level level,
				const char *fmt, va_list ap),
		 void *context)
{
	ev->debug_ops.debug = debug;
	ev->debug_ops.context = context;
	return 0;
}

/*
  debug function for ev_set_debug_stderr
*/
void ev_debug_stderr(void *context, enum ev_debug_level level,
			    const char *fmt, va_list ap) PRINTF_ATTRIBUTE(3,0);
void ev_debug_stderr(void *context, enum ev_debug_level level,
			    const char *fmt, va_list ap)
{
	if (level <= EV_DEBUG_WARNING) {
		vfprintf(stderr, fmt, ap);
	}
}

/*
  convenience function to setup debug messages on stderr
  messages of level EV_DEBUG_WARNING and higher are printed
*/
int ev_set_debug_stderr(struct event_context *ev)
{
	return ev_set_debug(ev, ev_debug_stderr, ev);
}

/*
 * log a message
 *
 * The default debug action is to ignore debugging messages.
 * This is the most appropriate action for a library.
 * Applications using the library must decide where to
 * redirect debugging messages
*/
void ev_debug(struct event_context *ev, enum ev_debug_level level, const char *fmt, ...)
{
	va_list ap;
	if (ev->debug_ops.debug == NULL) {
		return;
	}
	va_start(ap, fmt);
	ev->debug_ops.debug(ev->debug_ops.context, level, fmt, ap);
	va_end(ap);
}