#include <sstream>
#include <vector>
+#include "sha1.h"
+
/* In memory datatype to represent key/value pairs of information, such as file
* metadata. Currently implemented as map<string, string>. */
typedef std::map<std::string, std::string> dictionary;
OutputStream ℜ
};
+/* Like WrapperOutputStream, but additionally computes a checksum of data as it
+ * is written. */
+class ChecksumOutputStream : public OutputStream {
+public:
+ explicit ChecksumOutputStream(OutputStream &o);
+ virtual ~ChecksumOutputStream() { }
+
+ /* Once a checksum is computed, no further data should be written to the
+ * stream. */
+ const uint8_t *finish_and_checksum();
+ size_t checksum_size() const { return csum.checksum_size(); }
+
+protected:
+ virtual void write_internal(const void *data, size_t len);
+
+private:
+ OutputStream ℜ
+ SHA1Checksum csum;
+};
+
/* Simple wrappers that encode integers using a StringOutputStream and return
* the encoded result. */
std::string encode_u16(uint16_t val);
private:
typedef std::vector<std::pair<int64_t, int64_t> > object_table;
- OutputStream *out;
+ ChecksumOutputStream *out; // Output stream with checksumming enabled
+ OutputStream *raw_out; // Raw output stream, without checksumming
struct uuid id;
int64_t object_start_offset;