3 files changed, 28 insertions, 9 deletions
diff --git a/src/basic/bitmap.c b/src/basic/bitmap.c
index bf9d8d4d7c..7ea3357031 100644
--- a/src/basic/bitmap.c
+++ b/src/basic/bitmap.c
@@ -145,7 +145,10 @@ bool bitmap_isclear(Bitmap *b) {
 void bitmap_clear(Bitmap *b) {
         assert(b);
 
+        free(b->bitmaps);
+        b->bitmaps = NULL;
         b->n_bitmaps = 0;
+        b->bitmaps_allocated = 0;
 }
 
 bool bitmap_iterate(Bitmap *b, Iterator *i, unsigned *n) {
@@ -184,6 +187,9 @@ bool bitmap_iterate(Bitmap *b, Iterator *i, unsigned *n) {
 }
 
 bool bitmap_equal(Bitmap *a, Bitmap *b) {
+        size_t common_n_bitmaps;
+        Bitmap *c;
+        unsigned i;
 
         if (!a ^ !b)
                 return false;
@@ -191,8 +197,14 @@ bool bitmap_equal(Bitmap *a, Bitmap *b) {
         if (!a)
                 return true;
 
-        if (a->n_bitmaps != b->n_bitmaps)
+        common_n_bitmaps = MIN(a->n_bitmaps, b->n_bitmaps);
+        if (memcmp(a->bitmaps, b->bitmaps, sizeof(uint64_t) * common_n_bitmaps) != 0)
                 return false;
 
-        return memcmp(a->bitmaps, b->bitmaps, sizeof(uint64_t) * a->n_bitmaps) == 0;
+        c = a->n_bitmaps > b->n_bitmaps ? a : b;
+        for (i = common_n_bitmaps; i < c->n_bitmaps; i++)
+                if (c->bitmaps[i] != 0)
+                        return false;
+
+        return true;
 }
diff --git a/src/basic/util.c b/src/basic/util.c
index 1c15fbc172..a968e2156d 100644
--- a/src/basic/util.c
+++ b/src/basic/util.c
@@ -115,17 +115,23 @@ size_t page_size(void) {
         return pgsz;
 }
 
-bool streq_ptr(const char *a, const char *b) {
-
-        /* Like streq(), but tries to make sense of NULL pointers */
+int strcmp_ptr(const char *a, const char *b) {
 
+        /* Like strcmp(), but tries to make sense of NULL pointers */
         if (a && b)
-                return streq(a, b);
+                return strcmp(a, b);
 
-        if (!a && !b)
-                return true;
+        if (!a && b)
+                return -1;
 
-        return false;
+        if (a && !b)
+                return 1;
+
+        return 0;
+}
+
+bool streq_ptr(const char *a, const char *b) {
+        return strcmp_ptr(a, b) == 0;
 }
 
 char* endswith(const char *s, const char *postfix) {
diff --git a/src/basic/util.h b/src/basic/util.h
index 06c82665be..88c44273d4 100644
--- a/src/basic/util.h
+++ b/src/basic/util.h
@@ -71,6 +71,7 @@ size_t page_size(void) _pure_;
 #define strncaseeq(a, b, n) (strncasecmp((a), (b), (n)) == 0)
 
 bool streq_ptr(const char *a, const char *b) _pure_;
+int strcmp_ptr(const char *a, const char *b) _pure_;
 
 #define new(t, n) ((t*) malloc_multiply(sizeof(t), (n)))