From 79e46469093fc5bbbf4e358822e1e9ac9a1d1638 Mon Sep 17 00:00:00 2001
From: Jean Delvare <jdelvare@suse.de>
Date: Wed, 24 Nov 2010 12:48:17 +0000
Subject: Add utility function u64_range, which computes the range between two
 u64 values.

---
 util.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

(limited to 'util.c')

diff --git a/util.c b/util.c
index d292bf8..4e4c0af 100644
--- a/util.c
+++ b/util.c
@@ -201,3 +201,19 @@ err_close:
 	fclose(f);
 	return -1;
 }
+
+/* Returns end - start + 1, assuming start < end */
+u64 u64_range(u64 start, u64 end)
+{
+	u64 res;
+
+	res.h = end.h - start.h;
+	res.l = end.l - start.l;
+
+	if (end.l < start.l)
+		res.h--;
+	if (++res.l == 0)
+		res.h++;
+
+	return res;
+}
-- 
cgit v1.2.1