X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fbitmap.c;h=51ad5bf919eaa2bb39e46704bbfe1dee658da6cd;hb=4b0424809b823101c969a0691fc1db0c880ae64a;hp=ac568e97be072112dea6c3e4d7e65b9417a09e8d;hpb=bbb8dee92d639331e8bd81823638267dcc895396;p=sliver-openvswitch.git

diff --git a/lib/bitmap.c b/lib/bitmap.c
index ac568e97b..51ad5bf91 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -17,6 +17,7 @@
 #include <config.h>
 #include "bitmap.h"
 #include <string.h>
+#include "util.h"
 
 /* Allocates and returns a bitmap initialized to all-1-bits. */
 unsigned long *
@@ -92,3 +93,18 @@ bitmap_scan(const unsigned long int *bitmap, size_t start, size_t end)
     }
     return i;
 }
+
+/* Returns the number of 1-bits in the 'n'-bit bitmap at 'bitmap'. */
+size_t
+bitmap_count1(const unsigned long int *bitmap, size_t n)
+{
+    size_t i;
+    size_t count = 0;
+
+    BUILD_ASSERT(ULONG_MAX <= UINT64_MAX);
+    for (i = 0; i < BITMAP_N_LONGS(n); i++) {
+        count += count_1bits(bitmap[i]);
+    }
+
+    return count;
+}