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/*
 * Copyright (c) 2017-2019 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef UTIL_LOG_H
#define UTIL_LOG_H

#include <stdarg.h> // va_*
#include <stdio.h> // FILE
#include <time.h> // time, localtime

#define LOG_FATAL 0
#define LOG_ERROR 1
#define LOG_WARN  2
#define LOG_INFO  3
#define LOG_DEBUG 4
#define LOG_TRACE 5

typedef struct {
  int log_level;
  int debug;
  FILE * log_file;
} log_conf_t;

#define DEFAULT_LOG_CONF {      \
    .log_level = LOG_DEBUG,     \
    .debug = 0,                 \
    .log_file = NULL,           \
};

extern log_conf_t log_conf;

#define WITH_DEBUG(BLOCK)                       \
    if (log_conf.log_level >= LOG_DEBUG)        \
        BLOCK

#define FATAL(fmt, ...) (_log(LOG_FATAL, fmt, ##__VA_ARGS__ ))
#define ERROR(fmt, ...) (_log(LOG_ERROR, fmt, ##__VA_ARGS__ ))
#define WARN(fmt,  ...) (_log(LOG_WARN,  fmt, ##__VA_ARGS__ ))
#define INFO(fmt,  ...) (_log(LOG_INFO,  fmt, ##__VA_ARGS__ ))
#define DEBUG(fmt, ...) (_log(LOG_DEBUG, fmt, ##__VA_ARGS__ ))
#define TRACE(fmt, ...) (_log(LOG_TRACE, fmt, ##__VA_ARGS__ ))

void _log_va(int level, const char *fmt, va_list ap);

void _log(int level, const char *fmt, ...);

void fatal(char *fmt, ...);

#ifdef HAVE_BACKTRACE
#include <execinfo.h>
void print_trace(void);
#endif

#endif // UTIL_LOG_H