lmdb::stream Namespace Reference

Functions
mdb_size_t	count (MDB_cursor *cur)
std::pair< epee::span< const std::uint8_t >, epee::span< const std::uint8_t > >	get (MDB_cursor &cur, MDB_cursor_op op, std::size_t key, std::size_t value)

Function Documentation

count()

mdb_size_t lmdb::stream::count

(

MDB_cursor *

cur

)

get()

std::pair< epee::span< const std::uint8_t >, epee::span< const std::uint8_t > > lmdb::stream::get	(	MDB_cursor &	cur,
		MDB_cursor_op	op,
		std::size_t	key,
		std::size_t	value )

Calls mdb_cursor_get and does some error checking.

Parameters

cur	is given to mdb_cursor_get without modification.
op	is passed to mdb_cursor_get without modification.
key	expected key size or 0 to skip key size check.
value	expected value size or 0 to skip value size check.

Exceptions

std::system_error	if key != 0 and key_.mv_size != key.
std::system_error	if value != 0 and value_.mv_size != value.
std::system_error	if mdb_cursor_get returns any error other than MDB_NOTFOUND.

Returns

{key bytes, value bytes} or two empty spans if MDB_NOTFOUND.