/***************************************************************************
 * CVSID: $Id$
 *
 * logger.h : Logging facility
 *
 * Copyright (C) 2003 David Zeuthen, <david@fubar.dk>
 *
 * Licensed under the Academic Free License version 2.1
 *
 * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 **************************************************************************/

#ifdef __cplusplus
extern "C" {
#endif

#ifndef LOGGER_H
#define LOGGER_H

#include <stdio.h>
#include <stdlib.h>

/* Logging levels for HAL daemon */
enum {
	HAL_LOGPRI_TRACE = (1 << 0),   /**< function call sequences */
	HAL_LOGPRI_DEBUG = (1 << 1),   /**< debug statements in code */
	HAL_LOGPRI_INFO = (1 << 2),    /**< informational level */
	HAL_LOGPRI_WARNING = (1 << 3), /**< warnings */
	HAL_LOGPRI_ERROR = (1 << 4)    /**< error */
};

void logger_setup (int priority, const char *file, int line, const char *function);

void logger_emit (const char *format, ...);
/* void logger_forward_debug (const char *format, va_list args); */
void logger_forward_debug (const char *format, ...);

void logger_enable (void);
void logger_disable (void);

void logger_enable_syslog (void);
void logger_disable_syslog (void);

void setup_logger (void);

#ifdef __SUNPRO_C
#define __FUNCTION__ __func__
#endif

/** Trace logging macro */
#define HAL_TRACE(expr)   do {logger_setup(HAL_LOGPRI_TRACE,   __FILE__, __LINE__, __FUNCTION__); logger_emit expr; } while(0)

/** Debug information logging macro */
#define HAL_DEBUG(expr)   do {logger_setup(HAL_LOGPRI_DEBUG,   __FILE__, __LINE__, __FUNCTION__); logger_emit expr; } while(0)

/** Information level logging macro */
#define HAL_INFO(expr)    do {logger_setup(HAL_LOGPRI_INFO,    __FILE__, __LINE__, __FUNCTION__); logger_emit expr; } while(0)

/** Warning level logging macro */
#define HAL_WARNING(expr) do {logger_setup(HAL_LOGPRI_WARNING, __FILE__, __LINE__, __FUNCTION__); logger_emit expr; } while(0)

/** Error leve logging macro */
#define HAL_ERROR(expr)   do {logger_setup(HAL_LOGPRI_ERROR,   __FILE__, __LINE__, __FUNCTION__); logger_emit expr; } while(0)

/** Macro for terminating the program on an unrecoverable error */
#define DIE(expr) do {printf("*** [DIE] %s:%s():%d : ", __FILE__, __FUNCTION__, __LINE__); printf expr; printf("\n"); exit(1); } while(0)

#endif				/* LOGGER_H */

#ifdef __cplusplus
}
#endif