irc_util.c

   1   /********************************************************************\
   2   * BitlBee -- An IRC to other IM-networks gateway                     *
   3   *                                                                    *
   4   * Copyright 2002-2010 Wilmer van der Gaast and others                *
   5   \********************************************************************/
   6
   7 /* Some stuff that doesn't belong anywhere else.                        */
   8
   9 /*
  10   This program is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU General Public License as published by
  12   the Free Software Foundation; either version 2 of the License, or
  13   (at your option) any later version.
  14
  15   This program is distributed in the hope that it will be useful,
  16   but WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18   GNU General Public License for more details.
  19
  20   You should have received a copy of the GNU General Public License with
  21   the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
  22   if not, write to the Free Software Foundation, Inc., 59 Temple Place,
  23   Suite 330, Boston, MA  02111-1307  USA
  24 */
  25
  26 #include "bitlbee.h"
  27
  28 char *set_eval_timezone( set_t *set, char *value )
  29 {
  30         char *s;
  31
  32         if( strcmp( value, "local" ) == 0 ||
  33             strcmp( value, "gmt" ) == 0 || strcmp( value, "utc" ) == 0 )
  34                 return value;
  35
  36         /* Otherwise: +/- at the beginning optional, then one or more numbers,
  37            possibly followed by a colon and more numbers. Don't bother bound-
  38            checking them since users are free to shoot themselves in the foot. */
  39         s = value;
  40         if( *s == '+' || *s == '-' )
  41                 s ++;
  42
  43         /* \d+ */
  44         if( !isdigit( *s ) )
  45                 return SET_INVALID;
  46         while( *s && isdigit( *s ) ) s ++;
  47
  48         /* EOS? */
  49         if( *s == '\0' )
  50                 return value;
  51
  52         /* Otherwise, colon */
  53         if( *s != ':' )
  54                 return SET_INVALID;
  55         s ++;
  56
  57         /* \d+ */
  58         if( !isdigit( *s ) )
  59                 return SET_INVALID;
  60         while( *s && isdigit( *s ) ) s ++;
  61
  62         /* EOS */
  63         return *s == '\0' ? value : SET_INVALID;
  64 }
  65
  66 char *irc_format_timestamp( irc_t *irc, time_t msg_ts )
  67 {
  68         time_t now_ts = time( NULL );
  69         struct tm now, msg;
  70         char *set;
  71
  72         /* If the timestamp is <= 0 or less than a minute ago, discard it as
  73            it doesn't seem to add to much useful info and/or might be noise. */
  74         if( msg_ts <= 0 || msg_ts > now_ts - 60 )
  75                 return NULL;
  76
  77         set = set_getstr( &irc->b->set, "timezone" );
  78         if( strcmp( set, "local" ) == 0 )
  79         {
  80                 localtime_r( &now_ts, &now );
  81                 localtime_r( &msg_ts, &msg );
  82         }
  83         else
  84         {
  85                 int hr, min = 0, sign = 60;
  86
  87                 if( set[0] == '-' )
  88                 {
  89                         sign *= -1;
  90                         set ++;
  91                 }
  92                 else if( set[0] == '+' )
  93                 {
  94                         set ++;
  95                 }
  96
  97                 if( sscanf( set, "%d:%d", &hr, &min ) >= 1 )
  98                 {
  99                         msg_ts += sign * ( hr * 60 + min );
 100                         now_ts += sign * ( hr * 60 + min );
 101                 }
 102
 103                 gmtime_r( &now_ts, &now );
 104                 gmtime_r( &msg_ts, &msg );
 105         }
 106
 107         if( msg.tm_year == now.tm_year && msg.tm_yday == now.tm_yday )
 108                 return g_strdup_printf( "\x02[\x02\x02\x02%02d:%02d:%02d\x02]\x02 ",
 109                                         msg.tm_hour, msg.tm_min, msg.tm_sec );
 110         else
 111                 return g_strdup_printf( "\x02[\x02\x02\x02%04d-%02d-%02d "
 112                                         "%02d:%02d:%02d\x02]\x02 ",
 113                                         msg.tm_year + 1900, msg.tm_mon + 1, msg.tm_mday,
 114                                         msg.tm_hour, msg.tm_min, msg.tm_sec );
 115 }