/*
 * Copyright (c) 2011 Vojtech Horky
 * Copyright (c) 2011 Jiri Svoboda
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/** @addtogroup libc
 * @{
 */

#ifndef LIBC_IO_LOG_H_
#define LIBC_IO_LOG_H_

#include <stdarg.h>
#include <inttypes.h>
#include <bool.h>

typedef enum {
	LVL_FATAL,
	LVL_ERROR,
	LVL_WARN,
	LVL_NOTE,
	LVL_DEBUG,
	LVL_DEBUG2,

	/** For checking range of values */
	LVL_LIMIT
} log_level_t;

typedef sysarg_t log_context_t;
#define PRIlogctx PRIxn
#define LOG_CONTEXT_DEFAULT 0

extern const char *log_level_str(log_level_t);
extern int log_level_from_str(const char *, log_level_t *);

extern bool _log_shall_record(log_context_t, log_level_t);
extern int log_init(const char *, log_level_t);

extern log_context_t log_context_create(const char *);

#define log_ctx_msg(context, level, format, ...) \
	do { \
		if (_log_shall_record((context), (level))) { \
			_log_ctx_msg((context), (level), format, ##__VA_ARGS__); \
		} \
	} while (false)

#define log_ctx_msgv(context, level, format, args) \
	do { \
		if (_log_shall_record((context), (level))) { \
			_log_ctx_msgv((context), (level), format, args); \
		} \
	} while (false)

#define log_msg(level, format, ...) \
	log_ctx_msg(LOG_CONTEXT_DEFAULT, (level), (format), ##__VA_ARGS__)
#define log_msgv(level, format, args) \
	log_ctx_msgv(LOG_CONTEXT_DEFAULT, (level), (format), (args))

extern void _log_ctx_msg(log_context_t, log_level_t, const char *, ...);
extern void _log_ctx_msgv(log_context_t, log_level_t, const char *, va_list);

#endif

/** @}
 */