func (self *LsmDb) Get(key string, obj interface{}) error {
var cur *C.lsm_cursor
rc := C.lsm_csr_open(self.cdb, &cur)
if rc != C.LSM_OK {
return errors.New("cannot create cursor")
}
defer C.lsm_csr_close(cur)
cKey := C.CString(key)
defer C.free(unsafe.Pointer(cKey))
rc = C.lsm_csr_seek(cur, unsafe.Pointer(cKey), C.int(len(key)), C.LSM_SEEK_EQ)
if rc != C.LSM_OK {
return errors.New("error when seeking a key")
}
if C.lsm_csr_valid(cur) == lsmTrue {
var valP unsafe.Pointer
var valL C.int
rc = C.lsm_csr_value(cur, &valP, &valL)
if rc != C.LSM_OK {
return errors.New("error when retrieving value")
}
bs := C.GoBytes(valP, valL)
r := bytes.NewReader(bs)
err := decode(r, obj)
if err != nil {
return err
}
}
return nil
}
func (self *LsmDb) Iter(fun func(string, Getter) bool) {
var cur *C.lsm_cursor
rc := C.lsm_csr_open(self.cdb, &cur)
if rc != C.LSM_OK {
return
}
defer C.lsm_csr_close(cur)
var keyP, valP unsafe.Pointer
var keyL, valL C.int
for rc := C.lsm_csr_first(cur); rc == C.LSM_OK && C.lsm_csr_valid(cur) == lsmTrue; rc = C.lsm_csr_next(cur) {
rc = C.lsm_csr_key(cur, &keyP, &keyL)
if rc != C.LSM_OK {
break
}
rc = C.lsm_csr_value(cur, &valP, &valL)
if rc != C.LSM_OK {
break
}
key := string(C.GoBytes(keyP, keyL))
value := C.GoBytes(valP, valL)
r := bytes.NewReader(value)
ret := fun(key, func(obj interface{}) error {
return decode(r, obj)
})
if ret == false {
break
}
}
}