source: irc_util.c @ 4255320

  /********************************************************************\
  * BitlBee -- An IRC to other IM-networks gateway                     *
  *                                                                    *
  * Copyright 2002-2010 Wilmer van der Gaast and others                *
  \********************************************************************/

/* Some stuff that doesn't belong anywhere else.                        */

/*
  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 with
  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  Suite 330, Boston, MA  02111-1307  USA
*/

#include "bitlbee.h"

char *set_eval_timezone( set_t *set, char *value )
{
        char *s;
        
        if( strcmp( value, "local" ) == 0 ||
            strcmp( value, "gmt" ) == 0 || strcmp( value, "utc" ) == 0 )
                return value;
        
        /* Otherwise: +/- at the beginning optional, then one or more numbers,
           possibly followed by a colon and more numbers. Don't bother bound-
           checking them since users are free to shoot themselves in the foot. */
        s = value;
        if( *s == '+' || *s == '-' )
                s ++;
        
        /* \d+ */
        if( !isdigit( *s ) )
                return SET_INVALID;
        while( *s && isdigit( *s ) ) s ++;
        
        /* EOS? */
        if( *s == '\0' )
                return value;
        
        /* Otherwise, colon */
        if( *s != ':' )
                return SET_INVALID;
        s ++;
        
        /* \d+ */
        if( !isdigit( *s ) )
                return SET_INVALID;
        while( *s && isdigit( *s ) ) s ++;
        
        /* EOS */
        return *s == '\0' ? value : SET_INVALID;
}

char *irc_format_timestamp( irc_t *irc, time_t msg_ts )
{
        time_t now_ts = time( NULL );
        struct tm now, msg;
        char *set;
        
        /* If the timestamp is <= 0 or less than a minute ago, discard it as
           it doesn't seem to add to much useful info and/or might be noise. */
        if( msg_ts <= 0 || msg_ts > now_ts - 60 )
                return NULL;
        
        set = set_getstr( &irc->b->set, "timezone" );
        if( strcmp( set, "local" ) == 0 )
        {
                localtime_r( &now_ts, &now );
                localtime_r( &msg_ts, &msg );
        }
        else
        {
                int hr, min = 0, sign = 60;
                
                if( set[0] == '-' )
                {
                        sign *= -1;
                        set ++;
                }
                else if( set[0] == '+' )
                {
                        set ++;
                }
                
                if( sscanf( set, "%d:%d", &hr, &min ) >= 1 )
                {
                        msg_ts += sign * ( hr * 60 + min );
                        now_ts += sign * ( hr * 60 + min );
                }
                
                gmtime_r( &now_ts, &now );
                gmtime_r( &msg_ts, &msg );
        }
        
        if( msg.tm_year == now.tm_year && msg.tm_yday == now.tm_yday )
                return g_strdup_printf( "\x02[\x02\x02\x02%02d:%02d:%02d\x02]\x02 ",
                                        msg.tm_hour, msg.tm_min, msg.tm_sec );
        else
                return g_strdup_printf( "\x02[\x02\x02\x02%04d-%02d-%02d "
                                        "%02d:%02d:%02d\x02]\x02 ",
                                        msg.tm_year + 1900, msg.tm_mon + 1, msg.tm_mday,
                                        msg.tm_hour, msg.tm_min, msg.tm_sec );
}