/*
* This is like mktime, but without normalization of tm_wday and tm_yday.
*/
-time_t tm_to_time_t(const struct tm *tm)
+static time_t tm_to_time_t(const struct tm *tm)
{
static const int mdays[] = {
0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
return -1;
if (month < 2 || (year + 2) % 4)
day--;
+ if (tm->tm_hour < 0 || tm->tm_min < 0 || tm->tm_sec < 0)
+ return -1;
return (year * 365 + (year + 1) / 4 + mdays[month] + day) * 24*60*60UL +
tm->tm_hour * 60*60 + tm->tm_min * 60 + tm->tm_sec;
}
return offset * eastwest;
}
+const char *show_date_relative(unsigned long time, int tz,
+ const struct timeval *now,
+ char *timebuf,
+ size_t timebuf_size)
+{
+ unsigned long diff;
+ if (now->tv_sec < time)
+ return "in the future";
+ diff = now->tv_sec - time;
+ if (diff < 90) {
+ snprintf(timebuf, timebuf_size, "%lu seconds ago", diff);
+ return timebuf;
+ }
+ /* Turn it into minutes */
+ diff = (diff + 30) / 60;
+ if (diff < 90) {
+ snprintf(timebuf, timebuf_size, "%lu minutes ago", diff);
+ return timebuf;
+ }
+ /* Turn it into hours */
+ diff = (diff + 30) / 60;
+ if (diff < 36) {
+ snprintf(timebuf, timebuf_size, "%lu hours ago", diff);
+ return timebuf;
+ }
+ /* We deal with number of days from here on */
+ diff = (diff + 12) / 24;
+ if (diff < 14) {
+ snprintf(timebuf, timebuf_size, "%lu days ago", diff);
+ return timebuf;
+ }
+ /* Say weeks for the past 10 weeks or so */
+ if (diff < 70) {
+ snprintf(timebuf, timebuf_size, "%lu weeks ago", (diff + 3) / 7);
+ return timebuf;
+ }
+ /* Say months for the past 12 months or so */
+ if (diff < 365) {
+ snprintf(timebuf, timebuf_size, "%lu months ago", (diff + 15) / 30);
+ return timebuf;
+ }
+ /* Give years and months for 5 years or so */
+ if (diff < 1825) {
+ unsigned long years = diff / 365;
+ unsigned long months = (diff % 365 + 15) / 30;
+ int n;
+ n = snprintf(timebuf, timebuf_size, "%lu year%s",
+ years, (years > 1 ? "s" : ""));
+ if (months)
+ snprintf(timebuf + n, timebuf_size - n,
+ ", %lu month%s ago",
+ months, (months > 1 ? "s" : ""));
+ else
+ snprintf(timebuf + n, timebuf_size - n, " ago");
+ return timebuf;
+ }
+ /* Otherwise, just years. Centuries is probably overkill. */
+ snprintf(timebuf, timebuf_size, "%lu years ago", (diff + 183) / 365);
+ return timebuf;
+}
+
const char *show_date(unsigned long time, int tz, enum date_mode mode)
{
struct tm *tm;
}
if (mode == DATE_RELATIVE) {
- unsigned long diff;
struct timeval now;
gettimeofday(&now, NULL);
- if (now.tv_sec < time)
- return "in the future";
- diff = now.tv_sec - time;
- if (diff < 90) {
- snprintf(timebuf, sizeof(timebuf), "%lu seconds ago", diff);
- return timebuf;
- }
- /* Turn it into minutes */
- diff = (diff + 30) / 60;
- if (diff < 90) {
- snprintf(timebuf, sizeof(timebuf), "%lu minutes ago", diff);
- return timebuf;
- }
- /* Turn it into hours */
- diff = (diff + 30) / 60;
- if (diff < 36) {
- snprintf(timebuf, sizeof(timebuf), "%lu hours ago", diff);
- return timebuf;
- }
- /* We deal with number of days from here on */
- diff = (diff + 12) / 24;
- if (diff < 14) {
- snprintf(timebuf, sizeof(timebuf), "%lu days ago", diff);
- return timebuf;
- }
- /* Say weeks for the past 10 weeks or so */
- if (diff < 70) {
- snprintf(timebuf, sizeof(timebuf), "%lu weeks ago", (diff + 3) / 7);
- return timebuf;
- }
- /* Say months for the past 12 months or so */
- if (diff < 360) {
- snprintf(timebuf, sizeof(timebuf), "%lu months ago", (diff + 15) / 30);
- return timebuf;
- }
- /* Give years and months for 5 years or so */
- if (diff < 1825) {
- unsigned long years = (diff + 183) / 365;
- unsigned long months = (diff % 365 + 15) / 30;
- int n;
- n = snprintf(timebuf, sizeof(timebuf), "%lu year%s",
- years, (years > 1 ? "s" : ""));
- if (months)
- snprintf(timebuf + n, sizeof(timebuf) - n,
- ", %lu month%s ago",
- months, (months > 1 ? "s" : ""));
- else
- snprintf(timebuf + n, sizeof(timebuf) - n,
- " ago");
- return timebuf;
- }
- /* Otherwise, just years. Centuries is probably overkill. */
- snprintf(timebuf, sizeof(timebuf), "%lu years ago", (diff + 183) / 365);
- return timebuf;
+ return show_date_relative(time, tz, &now,
+ timebuf, sizeof(timebuf));
}
if (mode == DATE_LOCAL)
return end - date;
}
-/* Have we filled in any part of the time/date yet? */
+/*
+ * Have we filled in any part of the time/date yet?
+ * We just do a binary 'and' to see if the sign bit
+ * is set in all the values.
+ */
static inline int nodate(struct tm *tm)
{
- return tm->tm_year < 0 &&
- tm->tm_mon < 0 &&
- tm->tm_mday < 0 &&
- !(tm->tm_hour | tm->tm_min | tm->tm_sec);
+ return (tm->tm_year &
+ tm->tm_mon &
+ tm->tm_mday &
+ tm->tm_hour &
+ tm->tm_min &
+ tm->tm_sec) < 0;
}
/*
}
}
- if (num > 0 && num < 32) {
- tm->tm_mday = num;
- } else if (num > 0 && num < 13) {
+ if (num > 0 && num < 13 && tm->tm_mon < 0)
tm->tm_mon = num-1;
- }
return n;
}
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;
date_string(now, offset, buf, bufsize);
}
-static void update_tm(struct tm *tm, unsigned long sec)
+/*
+ * Relative time update (eg "2 days ago"). If we haven't set the time
+ * yet, we need to set it from current time.
+ */
+static unsigned long update_tm(struct tm *tm, struct tm *now, unsigned long sec)
{
- time_t n = mktime(tm) - sec;
+ time_t n;
+
+ if (tm->tm_mday < 0)
+ tm->tm_mday = now->tm_mday;
+ if (tm->tm_mon < 0)
+ tm->tm_mon = now->tm_mon;
+ if (tm->tm_year < 0) {
+ tm->tm_year = now->tm_year;
+ if (tm->tm_mon > now->tm_mon)
+ tm->tm_year--;
+ }
+
+ n = mktime(tm) - sec;
localtime_r(&n, tm);
+ return n;
}
-static void date_yesterday(struct tm *tm, int *num)
+static void date_now(struct tm *tm, struct tm *now, int *num)
{
- update_tm(tm, 24*60*60);
+ update_tm(tm, now, 0);
}
-static void date_time(struct tm *tm, int hour)
+static void date_yesterday(struct tm *tm, struct tm *now, int *num)
+{
+ update_tm(tm, now, 24*60*60);
+}
+
+static void date_time(struct tm *tm, struct tm *now, int hour)
{
if (tm->tm_hour < hour)
- date_yesterday(tm, NULL);
+ date_yesterday(tm, now, NULL);
tm->tm_hour = hour;
tm->tm_min = 0;
tm->tm_sec = 0;
}
-static void date_midnight(struct tm *tm, int *num)
+static void date_midnight(struct tm *tm, struct tm *now, int *num)
{
- date_time(tm, 0);
+ date_time(tm, now, 0);
}
-static void date_noon(struct tm *tm, int *num)
+static void date_noon(struct tm *tm, struct tm *now, int *num)
{
- date_time(tm, 12);
+ date_time(tm, now, 12);
}
-static void date_tea(struct tm *tm, int *num)
+static void date_tea(struct tm *tm, struct tm *now, int *num)
{
- date_time(tm, 17);
+ date_time(tm, now, 17);
}
-static void date_pm(struct tm *tm, int *num)
+static void date_pm(struct tm *tm, struct tm *now, int *num)
{
int hour, n = *num;
*num = 0;
tm->tm_hour = (hour % 12) + 12;
}
-static void date_am(struct tm *tm, int *num)
+static void date_am(struct tm *tm, struct tm *now, int *num)
{
int hour, n = *num;
*num = 0;
tm->tm_hour = (hour % 12);
}
-static void date_never(struct tm *tm, int *num)
+static void date_never(struct tm *tm, struct tm *now, int *num)
{
time_t n = 0;
localtime_r(&n, tm);
static const struct special {
const char *name;
- void (*fn)(struct tm *, int *);
+ void (*fn)(struct tm *, struct tm *, int *);
} special[] = {
{ "yesterday", date_yesterday },
{ "noon", date_noon },
{ "PM", date_pm },
{ "AM", date_am },
{ "never", date_never },
+ { "now", date_now },
{ NULL }
};
{ NULL }
};
-static const char *approxidate_alpha(const char *date, struct tm *tm, int *num)
+static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm *now, int *num, int *touched)
{
const struct typelen *tl;
const struct special *s;
int match = match_string(date, month_names[i]);
if (match >= 3) {
tm->tm_mon = i;
+ *touched = 1;
return end;
}
}
for (s = special; s->name; s++) {
int len = strlen(s->name);
if (match_string(date, s->name) == len) {
- s->fn(tm, num);
+ s->fn(tm, now, num);
+ *touched = 1;
return end;
}
}
int len = strlen(number_name[i]);
if (match_string(date, number_name[i]) == len) {
*num = i;
+ *touched = 1;
return end;
}
}
- if (match_string(date, "last") == 4)
+ if (match_string(date, "last") == 4) {
*num = 1;
+ *touched = 1;
+ }
return end;
}
while (tl->type) {
int len = strlen(tl->type);
if (match_string(date, tl->type) >= len-1) {
- update_tm(tm, tl->length * *num);
+ update_tm(tm, now, tl->length * *num);
*num = 0;
+ *touched = 1;
return end;
}
tl++;
n++;
diff += 7*n;
- update_tm(tm, diff * 24 * 60 * 60);
+ update_tm(tm, now, diff * 24 * 60 * 60);
+ *touched = 1;
return end;
}
}
if (match_string(date, "months") >= 5) {
- int n = tm->tm_mon - *num;
+ int n;
+ update_tm(tm, now, 0); /* fill in date fields if needed */
+ n = tm->tm_mon - *num;
*num = 0;
while (n < 0) {
n += 12;
tm->tm_year--;
}
tm->tm_mon = n;
+ *touched = 1;
return end;
}
if (match_string(date, "years") >= 4) {
+ update_tm(tm, now, 0); /* fill in date fields if needed */
tm->tm_year -= *num;
*num = 0;
+ *touched = 1;
return end;
}
return end;
}
-unsigned long approxidate(const char *date)
+/*
+ * Do we have a pending number at the end, or when
+ * we see a new one? Let's assume it's a month day,
+ * as in "Dec 6, 1992"
+ */
+static void pending_number(struct tm *tm, int *num)
+{
+ int number = *num;
+
+ if (number) {
+ *num = 0;
+ if (tm->tm_mday < 0 && number < 32)
+ tm->tm_mday = number;
+ else if (tm->tm_mon < 0 && number < 13)
+ tm->tm_mon = number-1;
+ else if (tm->tm_year < 0) {
+ if (number > 1969 && number < 2100)
+ tm->tm_year = number - 1900;
+ else if (number > 69 && number < 100)
+ tm->tm_year = number;
+ else if (number < 38)
+ tm->tm_year = 100 + number;
+ /* We screw up for number = 00 ? */
+ }
+ }
+}
+
+static unsigned long approxidate_str(const char *date,
+ const struct timeval *tv,
+ int *error_ret)
{
int number = 0;
+ int touched = 0;
struct tm tm, now;
- struct timeval tv;
time_t time_sec;
- char buffer[50];
-
- if (parse_date(date, buffer, sizeof(buffer)) > 0)
- return strtoul(buffer, NULL, 10);
- gettimeofday(&tv, NULL);
- time_sec = tv.tv_sec;
+ time_sec = tv->tv_sec;
localtime_r(&time_sec, &tm);
now = tm;
+
+ tm.tm_year = -1;
+ tm.tm_mon = -1;
+ tm.tm_mday = -1;
+
for (;;) {
unsigned char c = *date;
if (!c)
break;
date++;
if (isdigit(c)) {
+ pending_number(&tm, &number);
date = approxidate_digit(date-1, &tm, &number);
+ touched = 1;
continue;
}
if (isalpha(c))
- date = approxidate_alpha(date-1, &tm, &number);
+ date = approxidate_alpha(date-1, &tm, &now, &number, &touched);
+ }
+ pending_number(&tm, &number);
+ if (!touched)
+ *error_ret = 1;
+ return update_tm(&tm, &now, 0);
+}
+
+unsigned long approxidate_relative(const char *date, const struct timeval *tv)
+{
+ char buffer[50];
+ int errors = 0;
+
+ if (parse_date(date, buffer, sizeof(buffer)) > 0)
+ return strtoul(buffer, NULL, 0);
+
+ return approxidate_str(date, tv, &errors);
+}
+
+unsigned long approxidate_careful(const char *date, int *error_ret)
+{
+ struct timeval tv;
+ char buffer[50];
+ int dummy = 0;
+ if (!error_ret)
+ error_ret = &dummy;
+
+ if (parse_date(date, buffer, sizeof(buffer)) > 0) {
+ *error_ret = 0;
+ return strtoul(buffer, NULL, 0);
}
- if (number > 0 && number < 32)
- tm.tm_mday = number;
- if (tm.tm_mon > now.tm_mon && tm.tm_year == now.tm_year)
- tm.tm_year--;
- return mktime(&tm);
+
+ gettimeofday(&tv, NULL);
+ return approxidate_str(date, &tv, error_ret);
}