bitmap: implement map_and and MAPSETALL

[platform/upstream/libsolv.git] / src / bitmap.c

diff --git a/src/bitmap.c b/src/bitmap.c
index d57971d..94a88ca 100644 (file)
--- a/src/bitmap.c
+++ b/src/bitmap.c
@@ -59,4 +59,16 @@ map_grow(Map *m, int n)
     }
 }
 
+/* bitwise-ands same-sized maps t and s, stores the result in t. */
+void
+map_and(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 */