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kv.go
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kv.go
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package forestdb
// Copyright (c) 2014 Couchbase, Inc.
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file
// except in compliance with the License. You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
// Unless required by applicable law or agreed to in writing, software distributed under the
// License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
// either express or implied. See the License for the specific language governing permissions
// and limitations under the License.
//#include <stdlib.h>
//#include <libforestdb/forestdb.h>
import "C"
import (
"unsafe"
)
// GetKV simplified API for key/value access to Get()
func (k *KVStore) GetKV(key []byte) ([]byte, error) {
var kk unsafe.Pointer
if len(key) != 0 {
kk = unsafe.Pointer(&key[0])
}
lenk := len(key)
var bodyLen C.size_t
var bodyPointer unsafe.Pointer
Log.Tracef("fdb_get_kv call k:%p db:%p kk:%v", k, k.db, kk)
errNo := C.fdb_get_kv(k.db, kk, C.size_t(lenk), &bodyPointer, &bodyLen)
Log.Tracef("fdb_get_kv retn k:%p errNo:%v body:%p len:%v", k, errNo, bodyPointer, bodyLen)
if errNo != RESULT_SUCCESS {
return nil, Error(errNo)
}
body := C.GoBytes(bodyPointer, C.int(bodyLen))
C.fdb_free_block(bodyPointer)
return body, nil
}
// SetKV simplified API for key/value access to Set()
func (k *KVStore) SetKV(key, value []byte) error {
var kk, v unsafe.Pointer
if len(key) != 0 {
kk = unsafe.Pointer(&key[0])
}
if len(value) != 0 {
v = unsafe.Pointer(&value[0])
}
lenk := len(key)
lenv := len(value)
Log.Tracef("fdb_set_kv call k:%p db:%p kk:%v v:%v", k, k.db, kk, v)
errNo := C.fdb_set_kv(k.db, kk, C.size_t(lenk), v, C.size_t(lenv))
Log.Tracef("fdb_set_kv retn k:%p errNo:%v", k, errNo)
if errNo != RESULT_SUCCESS {
return Error(errNo)
}
return nil
}
// DeleteKV simplified API for key/value access to Delete()
func (k *KVStore) DeleteKV(key []byte) error {
var kk unsafe.Pointer
if len(key) != 0 {
kk = unsafe.Pointer(&key[0])
}
lenk := len(key)
Log.Tracef("fdb_del_kv call k:%p db:%p kk:%v", k, k.db, kk)
errNo := C.fdb_del_kv(k.db, kk, C.size_t(lenk))
Log.Tracef("fdb_del_kv retn k:%p errNo:%v", k, errNo)
if errNo != RESULT_SUCCESS {
return Error(errNo)
}
return nil
}