From fd144ef57517b9cff624d5c8ca11d2bc3f461ed2 Mon Sep 17 00:00:00 2001
From: Ales Kozumplik <akozumpl@redhat.com>
Date: Tue, 27 Mar 2012 14:06:42 +0200
Subject: bitmap: implement map_and_not.

---
 src/bitmap.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'src/bitmap.c')

diff --git a/src/bitmap.c b/src/bitmap.c
index 94a88ca..5a8dcd8 100644
--- a/src/bitmap.c
+++ b/src/bitmap.c
@@ -71,4 +71,16 @@ map_and(Map *t, Map *s)
 	*ti++ &= *si++;
 }
 
+/* like map_and but negates value in s first, i.e. t & ~s */
+void
+map_and_not(Map *t, Map *s)
+{
+    unsigned char *ti, *si, *end;
+    ti = t->map;
+    si = s->map;
+    end = ti + t->size;
+    while (ti < end)
+	*ti++ &= ~*si++;
+}
+
 /* EOF */
-- 
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