const struct strbuf *log, const char *uuid,
const char *url, unsigned long timestamp);
void fast_export_end_commit(uint32_t revision);
-void fast_export_data(uint32_t mode, uint32_t len, struct line_buffer *input);
+void fast_export_data(uint32_t mode, off_t len, struct line_buffer *input);
+void fast_export_blob_delta(uint32_t mode,
+ uint32_t old_mode, const char *old_data,
+ off_t len, struct line_buffer *input);
/* If there is no such file at that rev, returns -1, errno == ENOENT. */
int fast_export_ls_rev(uint32_t rev, const char *path,