+
+/* Scans 'bitmap' from bit offset 'start' to 'end', excluding 'end' itself.
+ * Returns the bit offset of the lowest-numbered bit set to 'target', or 'end'
+ * if all of the bits are set to '!target'. */
+size_t
+bitmap_scan(const unsigned long int *bitmap, bool target,
+ size_t start, size_t end)
+{
+ /* XXX slow */
+ size_t i;
+
+ for (i = start; i < end; i++) {
+ if (bitmap_is_set(bitmap, i) == target) {
+ break;
+ }
+ }
+ 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;
+}