1 files changed, 128 insertions, 0 deletions
diff --git a/src/test/common/ObjectContents.cc b/src/test/common/ObjectContents.cc
new file mode 100644
index 000000000..381c59c7c
--- /dev/null
+++ b/src/test/common/ObjectContents.cc
@@ -0,0 +1,128 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+#include "ObjectContents.h"
+#include "include/buffer.h"
+#include <iostream>
+#include <map>
+
+bool test_object_contents()
+{
+  ObjectContents c, d;
+  ceph_assert(!c.exists());
+  c.debug(std::cerr);
+  c.write(10, 10, 10);
+  ceph_assert(c.exists());
+  ceph_assert(c.size() == 20);
+
+  c.debug(std::cerr);
+  bufferlist bl;
+  for (ObjectContents::Iterator iter = c.get_iterator();
+       iter.valid();
+       ++iter) {
+    bl.append(*iter);
+  }
+  ceph_assert(bl.length() == 20);
+
+  bufferlist bl2;
+  for (unsigned i = 0; i < 8; ++i) bl2.append(bl[i]);
+  c.write(10, 8, 4);
+  c.debug(std::cerr);
+  ObjectContents::Iterator iter = c.get_iterator();
+  iter.seek_to(8);
+  for (uint64_t i = 8;
+       i < 12;
+       ++i, ++iter) {
+    bl2.append(*iter);
+  }
+  for (unsigned i = 12; i < 20; ++i) bl2.append(bl[i]);
+  ceph_assert(bl2.length() == 20);
+
+  for (ObjectContents::Iterator iter3 = c.get_iterator();
+       iter.valid();
+       ++iter) {
+    ceph_assert(bl2[iter3.get_pos()] == *iter3);
+  }
+
+  ceph_assert(bl2[0] == '\0');
+  ceph_assert(bl2[7] == '\0');
+
+  interval_set<uint64_t> to_clone;
+  to_clone.insert(5, 10);
+  d.clone_range(c, to_clone);
+  ceph_assert(d.size() == 15);
+
+  c.debug(std::cerr);
+  d.debug(std::cerr);
+
+  ObjectContents::Iterator iter2 = d.get_iterator();
+  iter2.seek_to(5);
+  for (uint64_t i = 5; i < 15; ++i, ++iter2) {
+    std::cerr << "i is " << i << std::endl;
+    ceph_assert(iter2.get_pos() == i);
+    ceph_assert(*iter2 == bl2[i]);
+  }
+  return true;
+}
+
+
+unsigned int ObjectContents::Iterator::get_state(uint64_t _pos)
+{
+  if (parent->seeds.count(_pos)) {
+    return parent->seeds[_pos];
+  }
+  seek_to(_pos - 1);
+  return current_state;
+}
+
+void ObjectContents::clone_range(ObjectContents &other,
+				 interval_set<uint64_t> &intervals)
+{
+  interval_set<uint64_t> written_to_clone;
+  written_to_clone.intersection_of(intervals, other.written);
+
+  interval_set<uint64_t> zeroed = intervals;
+  zeroed.subtract(written_to_clone);
+
+  written.union_of(intervals);
+  written.subtract(zeroed);
+
+  for (interval_set<uint64_t>::iterator i = written_to_clone.begin();
+       i != written_to_clone.end();
+       ++i) {
+    uint64_t start = i.get_start();
+    uint64_t len = i.get_len();
+
+    unsigned int seed = get_iterator().get_state(start+len);
+
+    seeds[start+len] = seed;
+    seeds.erase(seeds.lower_bound(start), seeds.lower_bound(start+len));
+
+    seeds[start] = other.get_iterator().get_state(start);
+    seeds.insert(other.seeds.upper_bound(start),
+		 other.seeds.lower_bound(start+len));
+  }
+
+  if (intervals.range_end() > _size)
+    _size = intervals.range_end();
+  _exists = true;
+  return;
+}
+
+void ObjectContents::write(unsigned int seed,
+			   uint64_t start,
+			   uint64_t len)
+{
+  _exists = true;
+  unsigned int _seed = get_iterator().get_state(start+len);
+  seeds[start+len] = _seed;
+  seeds.erase(seeds.lower_bound(start),
+	      seeds.lower_bound(start+len));
+  seeds[start] = seed;
+
+  interval_set<uint64_t> to_write;
+  to_write.insert(start, len);
+  written.union_of(to_write);
+
+  if (start + len > _size)
+    _size = start + len;
+  return;
+}