lib: Add timeval_str_buf

Similarly to server_id_str_buf it does not do any allocation

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>

2 files changed, 51 insertions, 0 deletions

diff --git a/lib/util/time.c b/lib/util/time.c
index 03345ec8d1f..c502dc40a01 100644
--- a/lib/util/time.c
+++ b/lib/util/time.c
@@ -342,6 +342,45 @@ _PUBLIC_ time_t pull_dos_date3(const uint8_t *date_ptr, int zone_offset)
 }
 
 
+char *timeval_str_buf(const struct timeval *tp, bool hires,
+		      struct timeval_buf *dst)
+{
+	time_t t;
+	struct tm *tm;
+	size_t len;
+
+	t = (time_t)tp->tv_sec;
+	tm = localtime(&t);
+
+	if (tm == NULL) {
+		if (hires) {
+			snprintf(dst->buf, sizeof(dst->buf),
+				 "%ld.%06ld seconds since the Epoch",
+				 (long)tp->tv_sec, (long)tp->tv_usec);
+		} else {
+			snprintf(dst->buf, sizeof(dst->buf),
+				 "%ld seconds since the Epoch", (long)t);
+		}
+		return dst->buf;
+	}
+
+#ifdef HAVE_STRFTIME
+	len = strftime(dst->buf, sizeof(dst->buf), "%Y/%m/%d %H:%M:%S", tm);
+#else
+	{
+		const char *asct = asctime(tm);
+		len = strlcpy(dst->buf, sizeof(dst->buf),
+			      asct ? asct : "unknown");
+	}
+#endif
+	if (hires && (len < sizeof(dst->buf))) {
+		snprintf(dst->buf + len, sizeof(dst->buf) - len,
+			 ".%06ld", (long)tp->tv_usec);
+	}
+
+	return dst->buf;
+}
+
 /****************************************************************************
  Return the date and time as a string
 ****************************************************************************/
diff --git a/lib/util/time.h b/lib/util/time.h
index 8595bb06137..44d4f455686 100644
--- a/lib/util/time.h
+++ b/lib/util/time.h
@@ -119,6 +119,18 @@ time_t pull_dos_date2(const uint8_t *date_ptr, int zone_offset);
 **/
 time_t pull_dos_date3(const uint8_t *date_ptr, int zone_offset);
 
+struct timeval_buf { char buf[128]; };
+
+/**
+ Put a date and time into dst->buf, return it dst->buf
+ (optionally with microseconds)
+
+ format is %Y/%m/%d %H:%M:%S if strftime is available
+**/
+
+char *timeval_str_buf(const struct timeval *tp, bool hires,
+		      struct timeval_buf *dst);
+
 /**
  Return a date and time as a string (optionally with microseconds)