bitmap: Add functions to set/clear ranges of bits

[ccan] / ccan / bitmap / test / run-ranges.c

diff --git a/ccan/bitmap/test/run-ranges.c b/ccan/bitmap/test/run-ranges.c
new file mode 100644 (file)
index 0000000..5ba383c
--- /dev/null
+++ b/ccan/bitmap/test/run-ranges.c
@@ -0,0 +1,77 @@
+#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, 24, 32, 64, 256,
+       /*
+        * Don't put too big sizes in here, or it will take forever to
+        * run under valgrind (the test is O(n^3)).
+        */
+};
+#define NSIZES ARRAY_SIZE(bitmap_sizes)
+#define NTESTS 2
+
+static void test_size(int nbits)
+{
+       BITMAP_DECLARE(bitmap, nbits);
+       uint32_t marker = 0xdeadbeef;
+       int i, j, k;
+       bool wrong;
+
+       for (i = 0; i < nbits; i++) {
+               for (j = i; j <= nbits; j++) {
+                       bitmap_zero(bitmap, nbits);
+                       bitmap_fill_range(bitmap, i, j);
+
+                       wrong = false;
+                       for (k = 0; k < nbits; k++) {
+                               bool inrange = (k >= i) && (k < j);
+                               wrong = wrong || (bitmap_test_bit(bitmap, k) != inrange);
+                       }
+                       ok1(!wrong);
+               }
+       }
+
+       for (i = 0; i < nbits; i++) {
+               for (j = i; j <= nbits; j++) {
+                       bitmap_fill(bitmap, nbits);
+                       bitmap_zero_range(bitmap, i, j);
+
+                       wrong = false;
+                       for (k = 0; k < nbits; k++) {
+                               bool inrange = (k >= i) && (k < j);
+                               wrong = wrong || (bitmap_test_bit(bitmap, k) == inrange);
+                       }
+                       ok1(!wrong);
+               }
+       }
+
+       ok1(marker == 0xdeadbeef);
+}
+
+int main(void)
+{
+       int totaltests = 0;
+       int i;
+
+       for (i = 0; i < NSIZES; i++) {
+               int size = bitmap_sizes[i];
+
+               /* Summing the arithmetic series gives: */
+               totaltests += size*(size + 3) + 1;
+       }
+       plan_tests(totaltests);
+
+       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();
+}