1 files changed, 15 insertions, 0 deletions
diff --git a/src/libbiguint/bu_srbc.c b/src/libbiguint/bu_srbc.c
new file mode 100644
index 0000000..87196b1
--- /dev/null
+++ b/src/libbiguint/bu_srbc.c
@@ -0,0 +1,15 @@
+/* ISC license. */
+
+#include <skalibs/uint32.h>
+#include <skalibs/biguint.h>
+
+int bu_srbc (register uint32 *a, register unsigned int n, register int carry)
+{
+  while (n--)
+  {
+    register int c = a[n] & 1 ;
+    a[n] = (a[n] >> 1) | (carry ? 0x80000000UL : 0) ;
+    carry = c ;
+  }
+  return carry ;
+}