1 files changed, 88 insertions, 0 deletions
diff --git a/src/crimson/os/cyan_object.cc b/src/crimson/os/cyan_object.cc
new file mode 100644
index 00000000..1612cebe
--- /dev/null
+++ b/src/crimson/os/cyan_object.cc
@@ -0,0 +1,88 @@
+#include "cyan_object.h"
+#include "include/encoding.h"
+
+namespace ceph::os {
+
+size_t Object::get_size() const {
+  return data.length();
+}
+
+int Object::read(uint64_t offset, uint64_t len, bufferlist &bl)
+{
+  bl.substr_of(data, offset, len);
+  return bl.length();
+}
+
+int Object::write(uint64_t offset, const bufferlist &src)
+{
+  unsigned len = src.length();
+  // before
+  bufferlist newdata;
+  if (get_size() >= offset) {
+    newdata.substr_of(data, 0, offset);
+  } else {
+    if (get_size()) {
+      newdata.substr_of(data, 0, get_size());
+    }
+    newdata.append_zero(offset - get_size());
+  }
+
+  newdata.append(src);
+
+  // after
+  if (get_size() > offset + len) {
+    bufferlist tail;
+    tail.substr_of(data, offset + len, get_size() - (offset + len));
+    newdata.append(tail);
+  }
+
+  data.claim(newdata);
+  return 0;
+}
+
+int Object::clone(Object *src, uint64_t srcoff, uint64_t len,
+                  uint64_t dstoff)
+{
+  bufferlist bl;
+  if (srcoff == dstoff && len == src->get_size()) {
+    data = src->data;
+    return 0;
+  }
+  bl.substr_of(src->data, srcoff, len);
+  return write(dstoff, bl);
+
+}
+
+int Object::truncate(uint64_t size)
+{
+  if (get_size() > size) {
+    bufferlist bl;
+    bl.substr_of(data, 0, size);
+    data.claim(bl);
+  } else if (get_size() == size) {
+    // do nothing
+  } else {
+    data.append_zero(size - get_size());
+  }
+  return 0;
+}
+
+void Object::encode(bufferlist& bl) const {
+  ENCODE_START(1, 1, bl);
+  encode(data, bl);
+  encode(xattr, bl);
+  encode(omap_header, bl);
+  encode(omap, bl);
+  ENCODE_FINISH(bl);
+}
+
+void Object::decode(bufferlist::const_iterator& p) {
+  DECODE_START(1, p);
+  decode(data, p);
+  decode(xattr, p);
+  decode(omap_header, p);
+  decode(omap, p);
+  DECODE_FINISH(p);
+}
+
+}