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#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);
}
}
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