1 files changed, 20 insertions, 0 deletions
diff --git a/src/libstddjb/tain_addsec.c b/src/libstddjb/tain_addsec.c
new file mode 100644
index 0000000..f4252a7
--- /dev/null
+++ b/src/libstddjb/tain_addsec.c
@@ -0,0 +1,20 @@
+/* ISC license. */
+
+#include <skalibs/tai.h>
+
+void tain_addsec (tain_t *b, tain_t const *a, int c)
+{
+  b->nano = a->nano ;
+  if (c >= 0)
+  {
+    tai_t t ;
+    tai_u64(&t, c) ;
+    tai_add(&b->sec, &a->sec, &t) ;
+  }
+  else
+  {
+    tai_t t ;
+    tai_u64(&t, -c) ;
+    tai_sub(&b->sec, &a->sec, &t) ;
+  }
+}