adding roaring64 to fuzzer as a step toward solving issue 662 (#670)

fuzz/croaring_fuzzer.c

@@ -20,7 +20,7 @@
 
 #include "roaring/roaring.h"
 
-int LLVMFuzzerTestOneInput(const char *data, size_t size) {
+int bitmap32(const char *data, size_t size) {
  // We test that deserialization never fails.
  roaring_bitmap_t *bitmap =
  roaring_bitmap_portable_deserialize_safe(data, size);
@@ -48,3 +48,44 @@ int LLVMFuzzerTestOneInput(const char *data, size_t size) {
  }
  return 0;
 }
+
+int bitmap64(const char *data, size_t size) {
+ // We test that deserialization never fails.
+ roaring64_bitmap_t *bitmap =
+ roaring64_bitmap_portable_deserialize_safe(data, size);
+ if (bitmap) {
+ // The bitmap may not be usable if it does not follow the specification.
+ // We can validate the bitmap we recovered to make sure it is proper.
+ const char *reason_failure = NULL;
+ if (roaring64_bitmap_internal_validate(bitmap, &reason_failure)) {
+ // the bitmap is ok!
+ uint64_t cardinality = roaring64_bitmap_get_cardinality(bitmap);
+
+ for (uint32_t i = 100; i < 1000; i++) {
+ if (!roaring64_bitmap_contains(bitmap, i)) {
+ cardinality++;
+ roaring64_bitmap_add(bitmap, i);
+ }
+ }
+ uint64_t new_cardinality = roaring64_bitmap_get_cardinality(bitmap);
+ if (cardinality != new_cardinality) {
+ printf("bug\n");
+ exit(1);
+ }
+ }
+ roaring64_bitmap_free(bitmap);
+ }
+ return 0;
+}
+int LLVMFuzzerTestOneInput(const char *data, size_t size) {
+ int r;
+ r = bitmap32(data, size);
+ if (r) {
+ return r;
+ }
+ r = bitmap64(data, size);
+ if (r) {
+ return r;
+ }
+ return 0;
+}