1 files changed, 23 insertions, 0 deletions
diff --git a/runit-2.1.2/src/taia_sub.c b/runit-2.1.2/src/taia_sub.c
new file mode 100644
index 0000000..d902e50
--- /dev/null
+++ b/runit-2.1.2/src/taia_sub.c
@@ -0,0 +1,23 @@
+/* Public domain. */
+
+#include "taia.h"
+
+/* XXX: breaks tai encapsulation */
+
+void taia_sub(struct taia *t,const struct taia *u,const struct taia *v)
+{
+  unsigned long unano = u->nano;
+  unsigned long uatto = u->atto;
+  
+  t->sec.x = u->sec.x - v->sec.x;
+  t->nano = unano - v->nano;
+  t->atto = uatto - v->atto;
+  if (t->atto > uatto) {
+    t->atto += 1000000000UL;
+    --t->nano;
+  }
+  if (t->nano > unano) {
+    t->nano += 1000000000UL;
+    --t->sec.x;
+  }
+}