// SPDX-License-Identifier: LGPL-2.1+
// Copyright (C) 2022, Linaro Ltd - Daniel Lezcano <daniel.lezcano@linaro.org>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include <syslog.h>
#include "log.h"

static const char *__ident = "unknown";
static int __options;

static const char * const loglvl[] = {
        [LOG_DEBUG]     = "DEBUG",
        [LOG_INFO]      = "INFO",
        [LOG_NOTICE]    = "NOTICE",
        [LOG_WARNING]   = "WARN",
        [LOG_ERR]       = "ERROR",
        [LOG_CRIT]      = "CRITICAL",
        [LOG_ALERT]     = "ALERT",
        [LOG_EMERG]     = "EMERG",
};

int log_str2level(const char *lvl)
{
        int i;

        for (i = 0; i < sizeof(loglvl) / sizeof(loglvl[LOG_DEBUG]); i++)
                if (!strcmp(lvl, loglvl[i]))
                        return i;

        return LOG_DEBUG;
}

extern void logit(int level, const char *format, ...)
{
        va_list args;

        va_start(args, format);

        if (__options & TO_SYSLOG)
                vsyslog(level, format, args);

        if (__options & TO_STDERR)
                vfprintf(stderr, format, args);

        if (__options & TO_STDOUT)
                vfprintf(stdout, format, args);

        va_end(args);
}

int log_init(int level, const char *ident, int options)
{
        if (!options)
                return -1;

        if (level > LOG_DEBUG)
                return -1;

        if (!ident)
                return -1;

        __ident = ident;
        __options = options;

        if (options & TO_SYSLOG) {
                openlog(__ident, options | LOG_NDELAY, LOG_USER);
                setlogmask(LOG_UPTO(level));
        }

        return 0;
}

void log_exit(void)
{
        closelog();
}