static time_t
xstrpisotime(const char *s, char **endptr)
{
/** like strptime() but strictly for ISO 8601 Zulu strings */
struct tm tm;
time_t res = (time_t)-1;
/* make sure tm is clean */
memset(&tm, 0, sizeof(tm));
/* as a courtesy to our callers, and since this is a non-standard
* routine, we skip leading whitespace */
for (; isspace(*s); s++);
/* read year */
if ((tm.tm_year = strtoi_lim(s, &s, 1583, 4095)) < 0 || *s++ != '-') {
goto out;
}
/* read month */
if ((tm.tm_mon = strtoi_lim(s, &s, 1, 12)) < 0 || *s++ != '-') {
goto out;
}
/* read day-of-month */
if ((tm.tm_mday = strtoi_lim(s, &s, 1, 31)) < 0 || *s++ != 'T') {
goto out;
}
/* read hour */
if ((tm.tm_hour = strtoi_lim(s, &s, 0, 23)) < 0 || *s++ != ':') {
goto out;
}
/* read minute */
if ((tm.tm_min = strtoi_lim(s, &s, 0, 59)) < 0 || *s++ != ':') {
goto out;
}
/* read second */
if ((tm.tm_sec = strtoi_lim(s, &s, 0, 60)) < 0 || *s++ != 'Z') {
goto out;
}
/* massage TM to fulfill some of POSIX' contraints */
tm.tm_year -= 1900;
tm.tm_mon--;
/* now convert our custom tm struct to a unix stamp using UTC */
res = time_from_tm(&tm);
out:
if (endptr != NULL) {
*endptr = deconst(s);
}
return res;
}
static time_t
isodate7(const unsigned char *v)
{
struct tm tm;
int offset;
memset(&tm, 0, sizeof(tm));
tm.tm_year = v[0];
tm.tm_mon = v[1] - 1;
tm.tm_mday = v[2];
tm.tm_hour = v[3];
tm.tm_min = v[4];
tm.tm_sec = v[5];
/* v[6] is the signed timezone offset, in 1/4-hour increments. */
offset = ((const signed char *)v)[6];
if (offset > -48 && offset < 52) {
tm.tm_hour -= offset / 4;
tm.tm_min -= (offset % 4) * 15;
}
return (time_from_tm(&tm));
}
static time_t
isodate17(const unsigned char *v)
{
struct tm tm;
int offset;
memset(&tm, 0, sizeof(tm));
tm.tm_year = (v[0] - '0') * 1000 + (v[1] - '0') * 100
+ (v[2] - '0') * 10 + (v[3] - '0')
- 1900;
tm.tm_mon = (v[4] - '0') * 10 + (v[5] - '0');
tm.tm_mday = (v[6] - '0') * 10 + (v[7] - '0');
tm.tm_hour = (v[8] - '0') * 10 + (v[9] - '0');
tm.tm_min = (v[10] - '0') * 10 + (v[11] - '0');
tm.tm_sec = (v[12] - '0') * 10 + (v[13] - '0');
/* v[16] is the signed timezone offset, in 1/4-hour increments. */
offset = ((const signed char *)v)[16];
if (offset > -48 && offset < 52) {
tm.tm_hour -= offset / 4;
tm.tm_min -= (offset % 4) * 15;
}
return (time_from_tm(&tm));
}
