+#include <ccan/bitmap/bitmap.h>
+#include <ccan/tap/tap.h>
+#include <ccan/array_size/array_size.h>
+#include <ccan/foreach/foreach.h>
+
+#include <ccan/bitmap/bitmap.c>
+
+int bitmap_sizes[] = {
+ 1, 2, 3, 4, 5, 6, 7, 8,
+ 16, 17, 24, 32, 33,
+ 64, 65, 127, 128, 129,
+ 1023, 1024, 1025,
+};
+#define NSIZES ARRAY_SIZE(bitmap_sizes)
+
+#define ok_eq(a, b) \
+ ok((a) == (b), "%s [%u] == %s [%u]", \
+ #a, (unsigned)(a), #b, (unsigned)(b))
+
+static void test_size(int nbits)
+{
+ BITMAP_DECLARE(bitmap, nbits);
+ int i;
+
+ bitmap_zero(bitmap, nbits);
+ ok_eq(bitmap_ffs(bitmap, 0, nbits), nbits);
+
+ for (i = 0; i < nbits; i++) {
+ bitmap_zero(bitmap, nbits);
+ bitmap_set_bit(bitmap, i);
+
+ ok_eq(bitmap_ffs(bitmap, 0, nbits), i);
+ ok_eq(bitmap_ffs(bitmap, i, nbits), i);
+ ok_eq(bitmap_ffs(bitmap, i + 1, nbits), nbits);
+
+ bitmap_zero(bitmap, nbits);
+ bitmap_fill_range(bitmap, i, nbits);
+
+ ok_eq(bitmap_ffs(bitmap, 0, nbits), i);
+ ok_eq(bitmap_ffs(bitmap, i, nbits), i);
+ ok_eq(bitmap_ffs(bitmap, i + 1, nbits), (i + 1));
+ ok_eq(bitmap_ffs(bitmap, nbits - 1, nbits), (nbits - 1));
+
+ if (i > 0) {
+ ok_eq(bitmap_ffs(bitmap, 0, i), i);
+ ok_eq(bitmap_ffs(bitmap, 0, i - 1), (i - 1));
+ }
+
+ if (i > 0) {
+ bitmap_zero(bitmap, nbits);
+ bitmap_fill_range(bitmap, 0, i);
+
+ ok_eq(bitmap_ffs(bitmap, 0, nbits), 0);
+ ok_eq(bitmap_ffs(bitmap, i - 1, nbits), (i - 1));
+ ok_eq(bitmap_ffs(bitmap, i, nbits), nbits);
+ }
+ }
+}
+
+int main(void)
+{
+ int i;
+
+ /* Too complicated to work out the exact number */
+ plan_no_plan();
+
+ for (i = 0; i < NSIZES; i++) {
+ diag("Testing %d-bit bitmap", bitmap_sizes[i]);
+ test_size(bitmap_sizes[i]);
+ }
+
+ /* This exits depending on whether all tests passed */
+ return exit_status();
+}