static int
_gdbm_fetch (mu_dbm_file_t db, struct mu_dbm_datum const *key,
struct mu_dbm_datum *ret)
{
struct gdbm_descr *gd = db->db_descr;
int rc;
datum keydat, content;
keydat.dptr = key->mu_dptr;
keydat.dsize = key->mu_dsize;
gdbm_errno = 0;
content = gdbm_fetch (gd->file, keydat);
if (content.dptr == NULL)
{
if (gdbm_errno == GDBM_ITEM_NOT_FOUND)
return MU_ERR_NOENT;
else
{
db->db_errno.n = gdbm_errno;
return MU_ERR_FAILURE;
}
}
mu_dbm_datum_free (ret);
rc = _gdbm_conv_datum (db, ret, content, 1);
if (rc)
{
free (content.dptr);
return rc;
}
return 0;
}
static int
_gdbm_nextkey (mu_dbm_file_t db, struct mu_dbm_datum *ret)
{
struct gdbm_descr *gd = db->db_descr;
int rc;
datum key;
if (!gd->prev.dptr)
return MU_ERR_NOENT;
key = gdbm_nextkey (gd->file, gd->prev);
if (key.dptr == NULL)
{
if (gdbm_errno == GDBM_ITEM_NOT_FOUND)
return MU_ERR_NOENT;
else
{
db->db_errno.n = gdbm_errno;
return MU_ERR_FAILURE;
}
}
mu_dbm_datum_free (ret);
rc = _gdbm_conv_datum (db, ret, key, 0);
if (rc)
{
free (key.dptr);
return rc;
}
free (gd->prev.dptr);
gd->prev = key;
return 0;
}
static int
_ndbm_fetch (mu_dbm_file_t db, struct mu_dbm_datum const *key,
struct mu_dbm_datum *ret)
{
datum keydat, content;
keydat.dptr = key->mu_dptr;
keydat.dsize = key->mu_dsize;
errno = 0;
content = dbm_fetch (db->db_descr, keydat);
mu_dbm_datum_free (ret);
if (content.dptr == NULL)
return MU_ERR_NOENT;
return _ndbm_conv_datum (db, ret, content);
}
static int
_tc_nextkey (mu_dbm_file_t db, struct mu_dbm_datum *ret)
{
TCHDB *hdb = db->db_descr;
void *ptr;
int retsize;
ptr = tchdbiternext (hdb, &retsize);
if (ptr)
{
mu_dbm_datum_free (ret);
ret->mu_dptr = ptr;
ret->mu_dsize = retsize;
return 0;
}
else if ((db->db_errno.n = tchdbecode (hdb)) == TCENOREC)
return MU_ERR_NOENT;
return MU_ERR_FAILURE;
}
