* range specifier is given, then by default the entire object is used.
* <range> ::= <start> "+" <length>
* Both <start> and <length> are decimal values. If included, the range is
- * enclosed in brackets.
+ * enclosed in brackets. As an abbreviation, if <start> is 0 then the range
+ * can be given as just <length> (no "+" needed).
*
* When both a checksum and a range are included, note that the checksum is
* taken over the entire original object, before the range is taken into
* and converted to and from the text representation. */
class ObjectReference {
public:
+ enum RefType { REF_NULL, REF_ZERO, REF_NORMAL };
+
+ ObjectReference();
+ ObjectReference(RefType t);
ObjectReference(const std::string& segment, int sequence);
+ ObjectReference(const std::string& segment, const std::string& sequence);
+ bool is_null() const { return type == REF_NULL; }
+ bool is_normal() const { return type == REF_NORMAL; }
std::string to_string() const;
+ static ObjectReference parse(const std::string& s);
std::string get_segment() const { return segment; }
- void set_segment(const std::string& segment) { this->segment = segment; }
+ std::string get_sequence() const { return object; }
+ std::string get_basename() const { return segment + "/" + object; }
bool has_checksum() const { return checksum_valid; }
std::string get_checksum() const { return checksum; }
void set_range(size_t start, size_t length)
{ range_start = start; range_length = length; range_valid = true; }
+ bool merge(ObjectReference ref);
+
private:
+ RefType type;
std::string segment, object, checksum;
size_t range_start, range_length;
bool checksum_valid, range_valid;