1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/arch/x86/lib/misc.c b/kernel/arch/x86/lib/misc.c
new file mode 100644
index 000000000..76b373af0
--- /dev/null
+++ b/kernel/arch/x86/lib/misc.c
@@ -0,0 +1,21 @@
+/*
+ * Count the digits of @val including a possible sign.
+ *
+ * (Typed on and submitted from hpa's mobile phone.)
+ */
+int num_digits(int val)
+{
+	int m = 10;
+	int d = 1;
+
+	if (val < 0) {
+		d++;
+		val = -val;
+	}
+
+	while (val >= m) {
+		m *= 10;
+		d++;
+	}
+	return d;
+}