notmuch: Break notmuch.c up into several smaller files.

[notmuch] / notmuch-time.c

diff --git a/notmuch-time.c b/notmuch-time.c
new file mode 100644 (file)
index 0000000..de56db9
--- /dev/null
+++ b/notmuch-time.c
@@ -0,0 +1,137 @@
+/* notmuch - Not much of an email program, (just index and search)
+ *
+ * Copyright © 2009 Carl Worth
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see http://www.gnu.org/licenses/ .
+ *
+ * Author: Carl Worth <cworth@cworth.org>
+ */
+
+#include "notmuch-client.h"
+
+/* Format a nice representation of 'time' relative to the current time.
+ *
+ * Examples include:
+ *
+ *     5 mins. ago     (For times less than 60 minutes ago)
+ *     Today 12:30     (For times >60 minutes but still today)
+ *     Yest. 12:30
+ *     Mon.  12:30     (Before yesterday but fewer than 7 days ago)
+ *     October 12      (Between 7 and 180 days ago (about 6 months))
+ *     2008-06-30      (More than 180 days ago)
+ *
+ * The returned string is either static data (a string literal) or
+ * newly talloced data belonging to 'ctx'. That is, the caller should
+ * not modify nor free the returned value. But when the caller
+ * arranges for 'ctx' to be talloc_freed, then memory allocated here
+ * (if any) will be reclaimed.
+ *
+ */
+#define MINUTE (60)
+#define HOUR (60 * MINUTE)
+#define DAY (24 * HOUR)
+#define RELATIVE_DATE_MAX 20
+const char *
+notmuch_time_relative_date (void *ctx, time_t then)
+{
+    struct tm tm_now, tm_then;
+    time_t now = time(NULL);
+    time_t delta;
+    char *result;
+
+    localtime_r (&now, &tm_now);
+    localtime_r (&then, &tm_then);
+
+    result = talloc_zero_size (ctx, RELATIVE_DATE_MAX);
+    if (result == NULL)
+       return "when?";
+
+    if (then > now)
+       return "the future";
+
+    delta = now - then;
+
+    if (delta > 180 * DAY) {
+       strftime (result, RELATIVE_DATE_MAX,
+                 "%F", &tm_then); /* 2008-06-30 */
+       return result;
+    }
+
+    if (delta < 3600) {
+       snprintf (result, RELATIVE_DATE_MAX,
+                 "%d mins. ago", (int) (delta / 60));
+       return result;
+    }
+
+    if (delta <= 7 * DAY) {
+       if (tm_then.tm_wday == tm_now.tm_wday &&
+           delta < DAY)
+       {
+           strftime (result, RELATIVE_DATE_MAX,
+                     "Today %R", &tm_then); /* Today 12:30 */
+           return result;
+       } else if ((tm_now.tm_wday + 7 - tm_then.tm_wday) % 7 == 1) {
+           strftime (result, RELATIVE_DATE_MAX,
+                     "Yest. %R", &tm_then); /* Yest. 12:30 */
+           return result;
+       } else {
+           if (tm_then.tm_wday != tm_now.tm_wday) {
+               strftime (result, RELATIVE_DATE_MAX,
+                         "%a. %R", &tm_then); /* Mon. 12:30 */
+               return result;
+           }
+       }
+    }
+
+    strftime (result, RELATIVE_DATE_MAX,
+             "%B %d", &tm_then); /* October 12 */
+    return result;
+}
+#undef MINUTE
+#undef HOUR
+#undef DAY
+
+void
+notmuch_time_print_formatted_seconds (double seconds)
+{
+    int hours;
+    int minutes;
+
+    if (seconds < 1) {
+       printf ("almost no time");
+       return;
+    }
+
+    if (seconds > 3600) {
+       hours = (int) seconds / 3600;
+       printf ("%dh ", hours);
+       seconds -= hours * 3600;
+    }
+
+    if (seconds > 60) {
+       minutes = (int) seconds / 60;
+       printf ("%dm ", minutes);
+       seconds -= minutes * 60;
+    }
+
+    printf ("%ds", (int) seconds);
+}
+
+/* Compute the number of seconds elapsed from start to end. */
+double
+notmuch_time_elapsed (struct timeval start, struct timeval end)
+{
+    return ((end.tv_sec - start.tv_sec) +
+           (end.tv_usec - start.tv_usec) / 1e6);
+}