log.h

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright 2016, Olivier MATZ <zer0@droids-corp.org>
 */

 
#pragma once
 
#include <stdarg.h>
#include <sys/queue.h>
#include <syslog.h>
 
#include <ecoli/assert.h>

enum ec_log_level {
    EC_LOG_EMERG = 0, 
    EC_LOG_ALERT = 1, 
    EC_LOG_CRIT = 2, 
    EC_LOG_ERR = 3, 
    EC_LOG_WARNING = 4, 
    EC_LOG_NOTICE = 5, 
    EC_LOG_INFO = 6, 
    EC_LOG_DEBUG = 7, 
};

struct ec_log_type {
    TAILQ_ENTRY(ec_log_type) next; 
    const char *name; 
    enum ec_log_level level; 
    int id; 
};

#define EC_LOG_TYPE_REGISTER(name)                                                                 \
    static struct ec_log_type name##_log_type = {                                              \
        .n##ame = #name,                                                                   \
    };                                                                                         \
    static int ec_log_local_type;                                                              \
    __attribute__((constructor, used)) static void ec_log_register_##name(void)                \
    {                                                                                          \
        ec_log_local_type = ec_log_type_register(&name##_log_type);                        \
        ec_assert_print(ec_log_local_type >= 0, "cannot register log type.\n");            \
    }

typedef int (*ec_log_t)(int type, enum ec_log_level level, void *opaque, const char *str);

int ec_log_fct_register(ec_log_t usr_log, void *opaque);

int ec_log_type_register(struct ec_log_type *type);

const char *ec_log_name(int type);

int ec_log(int type, enum ec_log_level level, const char *format, ...)
    __attribute__((format(__printf__, 3, 4)));

int ec_vlog(int type, enum ec_log_level level, const char *format, va_list ap);

#define EC_LOG(level, args...) ec_log(ec_log_local_type, level, args)

#define EC_VLOG(level, fmt, ap) ec_vlog(ec_log_local_type, level, fmt, ap)

int ec_log_default_cb(int type, enum ec_log_level level, void *opaque, const char *str);

int ec_log_level_set(enum ec_log_level level);

enum ec_log_level ec_log_level_get(void);