1 files changed, 15 insertions, 0 deletions

diff --git a/common/util.c b/common/util.c
new file mode 100644
index 00000000..ed6d033f
--- /dev/null
+++ b/common/util.c
@@ -0,0 +1,15 @@
+#include "util.h"
+
+int wrap(int i, int max) {
+        return ((i % max) + max) % max;
+}
+
+int numlen(int n) {
+        if (n >= 1000000) return 7;
+        if (n >= 100000) return 6;
+        if (n >= 10000) return 5;
+        if (n >= 1000) return 4;
+        if (n >= 100) return 3;
+        if (n >= 10) return 2;
+        return 1;
+}