Merge branch 'ns/send-email-no-chain-reply-to'
[gitweb.git] / date.c
diff --git a/date.c b/date.c
index 51c646166f0377b6073a2bbbdfdfd46df1ca54a2..5d05ef61cfb140f004702a5ed614afa755c50670 100644 (file)
--- a/date.c
+++ b/date.c
@@ -24,6 +24,8 @@ time_t tm_to_time_t(const struct tm *tm)
                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;
 }
@@ -84,6 +86,67 @@ static int local_tzoffset(unsigned long time)
        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;
@@ -95,63 +158,10 @@ const char *show_date(unsigned long time, int tz, enum date_mode mode)
        }
 
        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)
@@ -425,13 +435,19 @@ static int match_multi_number(unsigned long num, char c, const char *date, char
        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;
 }
 
 /*
@@ -580,6 +596,9 @@ int parse_date(const char *date, char *result, int maxlen)
        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;
 
@@ -838,7 +857,9 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
        }
 
        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;
@@ -849,6 +870,7 @@ static const char *approxidate_alpha(const char *date, struct tm *tm, struct tm
        }
 
        if (match_string(date, "years") >= 4) {
+               update_tm(tm, now, 0); /* fill in date fields if needed */
                tm->tm_year -= *num;
                *num = 0;
                return end;
@@ -893,22 +915,27 @@ static void pending_number(struct tm *tm, int *num)
                *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 ? */
+               }
        }
 }
 
-unsigned long approxidate(const char *date)
+static unsigned long approxidate_str(const char *date, const struct timeval *tv)
 {
        int number = 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;
 
@@ -932,3 +959,25 @@ unsigned long approxidate(const char *date)
        pending_number(&tm, &number);
        return update_tm(&tm, &now, 0);
 }
+
+unsigned long approxidate_relative(const char *date, const struct timeval *tv)
+{
+       char buffer[50];
+
+       if (parse_date(date, buffer, sizeof(buffer)) > 0)
+               return strtoul(buffer, NULL, 0);
+
+       return approxidate_str(date, tv);
+}
+
+unsigned long approxidate(const char *date)
+{
+       struct timeval tv;
+       char buffer[50];
+
+       if (parse_date(date, buffer, sizeof(buffer)) > 0)
+               return strtoul(buffer, NULL, 0);
+
+       gettimeofday(&tv, NULL);
+       return approxidate_str(date, &tv);
+}