X-Git-Url: https://git.ozlabs.org/?a=blobdiff_plain;f=ccan%2Fbitmap%2Ftest%2Frun-ffs.c;fp=ccan%2Fbitmap%2Ftest%2Frun-ffs.c;h=0f6cc4cf810ca00a3be745e3b42a4d77b173506e;hb=f591ef48f887f6c1608cdd89d78eebacd27e8552;hp=0000000000000000000000000000000000000000;hpb=b9c9f5d934cda9717e373824e81670ec075fe001;p=ccan

diff --git a/ccan/bitmap/test/run-ffs.c b/ccan/bitmap/test/run-ffs.c
new file mode 100644
index 00000000..0f6cc4cf
--- /dev/null
+++ b/ccan/bitmap/test/run-ffs.c
@@ -0,0 +1,74 @@
+#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();
+}