server/logger.c

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/************************************************************************
*            Atrinik, a Multiplayer Online Role Playing Game            *
*                                                                       *
*    Copyright (C) 2009-2011 Alex Tokar and Atrinik Development Team    *
*                                                                       *
* Fork from Daimonin (Massive Multiplayer Online Role Playing Game)     *
* and Crossfire (Multiplayer game for X-windows).                       *
*                                                                       *
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.             *
*                                                                       *
* The author can be reached at admin@atrinik.org                        *
************************************************************************/

#include <stdarg.h>
#include <global.h>

static const char *const loglevel_names[] =
{
    "[System] ",
    "[Error]  ",
    "[Bug]    ",
    "[Chat]   ",
    "[Info]   ",
    "[Debug]  "
};

static uint8 loglevel_name_disable = 0;

static void do_print(const char *buf)
{
    fputs(buf, logfile);

    /* Is logfile a custom file, and not stderr (default)? */
    if (logfile != stderr)
    {
        /* Log to stderr as well. */
        fputs(buf, stderr);
        /* Flush the log file. */
        fflush(logfile);
    }
}

void LOG(LogLevel logLevel, const char *format, ...)
{
    static int fatal_error = 0;
    char buf[HUGE_BUF * 2];

    if (logLevel <= settings.debug)
    {
        va_list ap;
        int written;

        /* If loglevel name was disabled but this is a bug or an error,
         * make an exception and put it onto the next line. */
        if (loglevel_name_disable && (logLevel == llevBug || logLevel == llevError))
        {
            loglevel_name_disable = 0;
            do_print("\n");
        }

        if (!loglevel_name_disable)
        {
            /* Prefix with timestamp. */
            if (settings.timestamp)
            {
                snprintf(buf, sizeof(buf), "[%"FMT64U"] ", (uint64) time(NULL));
                do_print(buf);
            }

            do_print(loglevel_names[logLevel]);
        }

        va_start(ap, format);
        written = vsnprintf(buf, sizeof(buf), format, ap);
        do_print(buf);

        if (written > 0)
        {
            /* If the last character isn't a newline, mark the next LOG
             * call to have the loglevel name disabled. */
            if (buf[written - 1] != '\n')
            {
                loglevel_name_disable = 1;
            }
            else
            {
                loglevel_name_disable = 0;
            }
        }

        va_end(ap);
    }

    if (logLevel == llevBug)
    {
        nroferrors++;
    }

    if (nroferrors > MAX_ERRORS || logLevel == llevError)
    {
        if (fatal_error == 0)
        {
            fatal_error = 1;
            fatal(logLevel);
        }
    }
}