const char *repo_lookup_checksum(Repo *repo, Id entry, Id keyname, Id *typep);
const unsigned char *repo_lookup_bin_checksum(Repo *repo, Id entry, Id keyname, Id *typep);
const void *repo_lookup_binary(Repo *repo, Id entry, Id keyname, int *lenp);
const char *repo_lookup_checksum(Repo *repo, Id entry, Id keyname, Id *typep);
const unsigned char *repo_lookup_bin_checksum(Repo *repo, Id entry, Id keyname, Id *typep);
const void *repo_lookup_binary(Repo *repo, Id entry, Id keyname, int *lenp);