/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
(i.e. English) day/month names, and it doesn't work correctly with %z. */
int parse_date_basic(const char *date, unsigned long *timestamp, int *offset)
{
struct tm tm;
int tm_gmt;
unsigned long dummy_timestamp;
int dummy_offset;
if (!timestamp)
timestamp = &dummy_timestamp;
if (!offset)
offset = &dummy_offset;
memset(&tm, 0, sizeof(tm));
tm.tm_year = -1;
tm.tm_mon = -1;
tm.tm_mday = -1;
tm.tm_isdst = -1;
tm.tm_hour = -1;
tm.tm_min = -1;
tm.tm_sec = -1;
*offset = -1;
tm_gmt = 0;
if (*date == '@' &&
!match_object_header_date(date + 1, timestamp, offset))
return 0; /* success */
for (;;) {
int match = 0;
unsigned char c = *date;
/* Stop at end of string or newline */
if (!c || c == '\n')
break;
if (isalpha(c))
match = match_alpha(date, &tm, offset);
else if (isdigit(c))
match = match_digit(date, &tm, offset, &tm_gmt);
else if ((c == '-' || c == '+') && isdigit(date[1]))
match = match_tz(date, offset);
if (!match) {
/* BAD CRAP */
match = 1;
}
date += match;
}
/* mktime uses local timezone */
*timestamp = tm_to_time_t(&tm);
if (*offset == -1) {
time_t temp_time = mktime(&tm);
if ((time_t)*timestamp > temp_time) {
*offset = ((time_t)*timestamp - temp_time) / 60;
} else {
*offset = -(int)((temp_time - (time_t)*timestamp) / 60);
}
}
if (*timestamp == -1)
return -1;
if (!tm_gmt)
*timestamp -= *offset * 60;
return 0; /* success */
}
/* Gr. strptime is crap for this; it doesn't have a way to require RFC2822
(i.e. English) day/month names, and it doesn't work correctly with %z. */
int parse_date_basic(const char *date, struct timeval *tv, int *offset)
{
struct atm tm;
int tm_gmt;
int dummy_offset;
if (!offset)
offset = &dummy_offset;
tm.tm_year = -1;
tm.tm_mon = -1;
tm.tm_mday = -1;
tm.tm_isdst = -1;
tm.tm_hour = -1;
tm.tm_min = -1;
tm.tm_sec = -1;
tm.tm_usec = 0;
*offset = -1;
tm_gmt = 0;
if (*date == '@' &&
!match_object_header_date(date + 1, tv, offset))
return 0; /* success */
for (;;) {
int match = 0;
unsigned char c = *date;
/* Stop at end of string or newline */
if (!c || c == '\n')
break;
if (isalpha(c))
match = match_alpha(date, &tm, offset);
else if (isdigit(c))
match = match_digit(date, &tm, offset, &tm_gmt);
else if ((c == '-' || c == '+') && isdigit(date[1]))
match = match_tz(date, offset);
if (!match) {
/* BAD CRAP */
match = 1;
}
date += match;
}
// mktime() is larger than struct atm, so it can clobber usec
tv->tv_usec = tm.tm_usec;
/* mktime uses local timezone */
tv->tv_sec = tm_to_time_t(&tm);
if (*offset == -1)
*offset = (((time_t)tv->tv_sec) - mktime((struct tm*)&tm)) / 60;
if (tv->tv_sec == -1)
return -1;
if (!tm_gmt)
tv->tv_sec -= *offset * 60;
return 0; /* success */
}