1 files changed, 17 insertions, 1 deletions
diff --git a/src/timestamp.rs b/src/timestamp.rs
index 52ab154..73fe91f 100644
--- a/src/timestamp.rs
+++ b/src/timestamp.rs
@@ -1,11 +1,27 @@
+use std::time::{SystemTime, UNIX_EPOCH};
+
 pub type TAI64N = [u8; 12];
 
+const TAI64_EPOCH : u64 = 4000000000000000;
+
 pub fn zero() -> TAI64N {
     [0u8; 12]
 }
 
 pub fn now() -> TAI64N {
-    [0u8; 12] // TODO, return current timestamp
+    // get system time as duration
+    let sysnow  = SystemTime::now();
+    let delta   = sysnow.duration_since(UNIX_EPOCH).unwrap();
+
+    // convert to tai64n
+    let tai64_secs = delta.as_secs() + TAI64_EPOCH;
+    let tai64_nano = delta.subsec_nanos();
+
+    // serialize
+    let mut res = [0u8; 12];
+    res[..8].copy_from_slice(&tai64_secs.to_be_bytes()[..]);
+    res[8..].copy_from_slice(&tai64_nano.to_be_bytes()[..]);
+    res
 }
 
 pub fn compare(old : &TAI64N, new : &TAI64N) -> bool {