time_t GetDate(const uni_char* date_str)
{
struct tm gmt_time;
if (GetTmDate(date_str, gmt_time))
{
if (gmt_time.tm_year < 70 ||
(gmt_time.tm_year == 70 && (gmt_time.tm_mon <= 0 || gmt_time.tm_mday < 1 ||
(gmt_time.tm_hour == 0 && gmt_time.tm_min == 0 && gmt_time.tm_sec == 0))) )
return 1;
/* Avoid overflowing time functions: A four-digit time_t wraps
* after 2037; a eight-digit time_t overflows a 32-bit signed
* int for time formatting in the year 2147483647 (0x7FFFFFFF),
* which adjusted for the 1900 offset is 0x7FFFF893 */
static const int max_tm_year = sizeof (time_t) == 4 ? 136 : 0x7FFFF893;
if(gmt_time.tm_year > max_tm_year)
gmt_time.tm_year = max_tm_year;
time_t ret_time = op_timegm(&gmt_time);
if ((long)ret_time == -1)
return 0;
return ret_time;
}
return 0;
}
time_t ParseDate(char *date_string)
{
#ifdef _OPENWAVE
struct op_tm tm;
if (op_time_parse_http_date(date_string, &tm))
{
return op_timegm(&tm);
}
return 0;
#else
struct tm time_info; // Points to static tm structure
char* ip = NULL;
char mname[256] = {0}; /* Flawfinder: ignore */
time_t rv;
memset(&time_info, 0, sizeof(struct tm));
// Whatever format we're looking at, it will start with weekday.
// Skip to first space
if(!(ip = strchr(date_string,' ')))
{
return 0;
}
else
{
while(IS_SPACE(*ip))
{
++ip;
}
}
/* make sure that the date is less than 256
* That will keep mname from ever overflowing
*/
if(255 < strlen(ip))
{
return 0;
}
if(isalpha(*ip))
{
// ctime
sscanf(ip, (strstr(ip, "DST") ? "%s %d %d:%d:%d %*s %d"
: "%s %d %d:%d:%d %d"),
mname,
&time_info.tm_mday,
&time_info.tm_hour,
&time_info.tm_min,
&time_info.tm_sec,
&time_info.tm_year);
time_info.tm_year -= 1900;
}
else if(ip[2] == '-')
{
// RFC 850 (normal HTTP)
char t[256] = {0}; /* Flawfinder: ignore */
sscanf(ip,"%s %d:%d:%d", t,
&time_info.tm_hour,
&time_info.tm_min,
&time_info.tm_sec);
t[2] = '\0';
time_info.tm_mday = atoi(t);
t[6] = '\0';
SafeStrCpy(mname, &t[3], 256);
time_info.tm_year = atoi(&t[7]);
// Prevent wraparound from ambiguity
if(time_info.tm_year < 70)
{
time_info.tm_year += 100;
}
else if(time_info.tm_year > 1900)
{
time_info.tm_year -= 1900;
}
}
else
{
// RFC 822
sscanf(ip,"%d %s %d %d:%d:%d",&time_info.tm_mday,
mname,
&time_info.tm_year,
&time_info.tm_hour,
&time_info.tm_min,
&time_info.tm_sec);
// since tm_year is years since 1900 and the year we parsed
// is absolute, we need to subtract 1900 years from it
time_info.tm_year -= 1900;
}
time_info.tm_mon = MonthNo(mname);
if(time_info.tm_mon == -1)
{
return 0;
}
rv = mktime(&time_info);
#ifndef NO_TM_ISDST
if(time_info.tm_isdst)
{
rv -= 3600;
}
#endif /* NO_TM_ISDST */
if(rv == -1)
{
return(0);
}
else
{
return(rv);
}
#endif /* _OPENWAVE */
}
