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: [PATCH] bitmap: implement map_and_not.

---
 src/bitmap.c    | 12 ++++++++++++
 src/bitmap.h    |  1 +
 src/libsolv.ver |  1 +
 3 files changed, 14 insertions(+)

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 */
diff --git a/src/bitmap.h b/src/bitmap.h
index 12257ff..b098b26 100644
--- a/src/bitmap.h
+++ b/src/bitmap.h
@@ -35,6 +35,7 @@ extern void map_init_clone(Map *t, Map *s);
 extern void map_grow(Map *m, int n);
 extern void map_free(Map *m);
 extern void map_and(Map *t, Map *s);
+extern void map_and_not(Map *t, Map *s);
 
 static inline void map_empty(Map *m)
 {
diff --git a/src/libsolv.ver b/src/libsolv.ver
index 5204e29..3902354 100644
--- a/src/libsolv.ver
+++ b/src/libsolv.ver
@@ -27,6 +27,7 @@ SOLV_1.0 {
 		dirpool_init;
 		dirpool_make_dirtraverse;
 		map_and;
+		map_and_not;
 		map_free;
 		map_grow;
 		map_init;
-- 
2.7.4