// Fetch ...
func (db *Database) Fetch(key []byte) (value []byte, err error) {
var n C.unqlite_int64
res := C.unqlite_kv_fetch(db.handle, unsafe.Pointer(&key[0]), C.int(len(key)), nil, &n)
if res != C.UNQLITE_OK {
err = UnQLiteError(res)
return
}
value = make([]byte, int(n))
res = C.unqlite_kv_fetch(db.handle, unsafe.Pointer(&key[0]), C.int(len(key)), unsafe.Pointer(&value[0]), &n)
if res != C.UNQLITE_OK {
err = UnQLiteError(res)
}
return
}
// KvFetch a record from the database
// See: http://unqlite.org/c_api/unqlite_kv_fetch.html
func (u *Unqlite) KvFetch(key []byte) ([]byte, error) {
var n C.unqlite_int64
if rc := C.unqlite_kv_fetch(u.db, unsafe.Pointer(&key[0]), C.int(len(key)), nil, &n); rc != C.UNQLITE_OK {
return nil, ErrCode(rc)
}
buf := make([]byte, int64(n))
if rc := C.unqlite_kv_fetch(u.db, unsafe.Pointer(&key[0]), C.int(len(key)), unsafe.Pointer(&buf[0]), &n); rc != C.UNQLITE_OK {
return nil, ErrCode(rc)
}
return buf, nil
}
// Fetch retrieves the value for the specified key from the database.
func (h *Handle) Fetch(key []byte) (value []byte, err error) {
// Fetch size of value.
var n C.unqlite_int64
rv := C.unqlite_kv_fetch(h.db, unsafe.Pointer(&key[0]), C.int(len(key)), nil, &n)
if rv != C.UNQLITE_OK {
return nil, Errno(rv)
}
// Fetch value.
b := make([]byte, int(n))
rv = C.unqlite_kv_fetch(h.db, unsafe.Pointer(&key[0]), C.int(len(key)), unsafe.Pointer(&b[0]), &n)
if rv != C.UNQLITE_OK {
return nil, Errno(rv)
}
return b, nil
}
func (u *Unqlite) KvFetch(key, value []byte) ([]byte, error) {
outlen := C.unqlite_int64(len(value))
e := C.unqlite_kv_fetch(u.db, unsafe.Pointer(&key[0]), C.int(len(key)), unsafe.Pointer(&value[0]), &outlen)
err := code2Error(e)
n := int(outlen)
if n <= 0 {
return nil, err
}
return value[:n], err
}