1 files changed, 19 insertions, 0 deletions
diff --git a/sourcecodes/k-best/src/varpar.c b/sourcecodes/k-best/src/varpar.c
new file mode 100644
index 00000000..584799c6
--- /dev/null
+++ b/sourcecodes/k-best/src/varpar.c
@@ -0,0 +1,19 @@
+#include "varpar.h"
+
+varset_t parset2varset(int v, varset_t set){
+  varset_t sinkleton = 1U<<v;
+  varset_t mask      = sinkleton - 1;
+  varset_t low       = set &  mask;
+  varset_t high      = set & ~mask;
+  return (high<<1) | low;
+}
+
+varset_t varset2parset(int v, varset_t set){
+  /* assumes v not set */
+  varset_t sinkleton = 1U<<v;
+  varset_t mask      = sinkleton - 1;
+  varset_t low       = set &  mask;
+  varset_t high      = set & ~mask;
+  return (high>>1) | low;
+}
+