04.08: find a portable way to obtain the timezone offset
Portable GMT offset calculation to display correct time on GSM. Change-Id: I673f17af2550c9708c4771e4ea4eafbbfafbb824
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@ -496,12 +496,19 @@ int gsm48_tx_mm_info(struct gsm_subscriber_connection *conn)
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else {
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/* Need to get GSM offset and convert into 15 min units */
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/* This probably breaks if gmtoff returns a value not evenly divisible by 15? */
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local_time = localtime(&cur_t);
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#ifdef HAVE_TM_GMTOFF_IN_TM
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local_time = localtime(&cur_t);
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tzunits = (local_time->tm_gmtoff/60)/15;
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#else
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#warning find a portable way to obtain the timezone offset
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tzunits = 0;
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/* find timezone offset */
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time_t utc;
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double offsetFromUTC;
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utc = mktime(gmt_time);
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local_time = localtime(&cur_t);
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offsetFromUTC = difftime(cur_t, utc);
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if (local_time->tm_isdst)
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offsetFromUTC += 3600.0;
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tzunits = ((int)offsetFromUTC) / 60 / 15;
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#endif
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if (tzunits < 0) {
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tzunits = tzunits/-1;
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