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index_int64.go
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/
index_int64.go
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package nosql
import (
"encoding/binary"
"github.com/moontrade/mdbx-go"
"unsafe"
)
var (
_ Index = (*Int64)(nil)
)
type Int64ValueOf func(data string, unmarshalled interface{}) (int64, error)
type Int64 struct {
indexBase
ValueOf Int64ValueOf
}
func NewInt64(
name, selector, version string,
valueOf Int64ValueOf,
) *Int64 {
if valueOf == nil {
valueOf = jsonInt64(selector)
}
return &Int64{
ValueOf: valueOf,
indexBase: newIndexBase(name, selector, version, IndexKindInt64, false, false),
}
}
func (i64 *Int64) doInsert(tx *Tx) error {
var (
value, err = i64.ValueOf(tx.doc, tx.docTyped)
)
if err != nil {
if err == ErrSkip {
return err
}
}
// Set key to next value
*(*uint32)(unsafe.Pointer(&tx.buffer[0])) = i64.IndexMeta.ID
binary.BigEndian.PutUint64(tx.buffer[4:], uint64(tx.docID))
binary.BigEndian.PutUint64(tx.buffer[12:], *(*uint64)(unsafe.Pointer(&value)))
var (
key = mdbx.Val{
Base: &tx.buffer[0],
Len: 20,
}
data = tx.docID.Key()
)
if err = tx.index.Put(&key, &data, 0); err != mdbx.ErrSuccess {
return err
} else {
err = nil
}
return nil
}
func (i64 *Int64) doUpdate(tx *Tx) error {
if len(tx.prev) == 0 {
return i64.doInsert(tx)
}
var (
prevValue, prevErr = i64.ValueOf(tx.prev, tx.prevTyped)
prevSkip = prevErr == ErrSkip
nextValue, nextErr = i64.ValueOf(tx.doc, tx.docTyped)
nextSkip = nextErr == ErrSkip
)
if prevSkip {
prevErr = nil
}
if nextSkip {
if prevSkip {
return nil
}
nextErr = nil
}
if nextErr != nil {
return nextErr
}
if prevErr != nil {
return prevErr
}
// Previous value?
if !prevSkip {
// Did value change?
if !nextSkip && prevValue == nextValue {
return nil
}
// Set key to existing value
*(*uint32)(unsafe.Pointer(&tx.buffer[0])) = i64.IndexMeta.ID
binary.BigEndian.PutUint64(tx.buffer[4:], uint64(tx.docID))
binary.BigEndian.PutUint64(tx.buffer[12:], *(*uint64)(unsafe.Pointer(&prevValue)))
var (
key = mdbx.Val{
Base: &tx.buffer[0],
Len: 20,
}
data mdbx.Val
)
// Find entry of previous value.
if prevErr = tx.index.Get(&key, &data, mdbx.CursorSetRange); prevErr != mdbx.ErrSuccess {
if prevErr == mdbx.ErrNotFound {
prevErr = nil
} else {
return nil
}
} else {
prevErr = nil
keyBytes := key.UnsafeBytes()
if key.Len == 20 &&
*(*uint32)(unsafe.Pointer(&keyBytes[0])) == i64.IndexMeta.ID &&
DocID(binary.BigEndian.Uint64(keyBytes[4:])) == tx.docID &&
bigEndianI64(keyBytes[12:]) == prevValue {
if prevErr = tx.index.Delete(0); prevErr != mdbx.ErrSuccess {
return prevErr
} else {
prevErr = nil
}
}
}
}
if !nextSkip {
// Set key to next value
*(*uint32)(unsafe.Pointer(&tx.buffer[0])) = i64.IndexMeta.ID
binary.BigEndian.PutUint64(tx.buffer[4:], uint64(tx.docID))
binary.BigEndian.PutUint64(tx.buffer[12:], *(*uint64)(unsafe.Pointer(&nextValue)))
var (
key = mdbx.Val{
Base: &tx.buffer[0],
Len: 20,
}
data mdbx.Val
)
if nextErr = tx.index.Put(&key, &data, 0); nextErr != mdbx.ErrSuccess {
return nextErr
} else {
nextErr = nil
}
}
return nil
}
func (i64 *Int64) doDelete(tx *Tx) error {
var (
value, err = i64.ValueOf(tx.doc, tx.docTyped)
)
if err != nil {
if err == ErrSkip {
return err
}
}
// Set key to next value
*(*uint32)(unsafe.Pointer(&tx.buffer[0])) = i64.IndexMeta.ID
binary.BigEndian.PutUint64(tx.buffer[4:], uint64(tx.docID))
binary.BigEndian.PutUint64(tx.buffer[12:], *(*uint64)(unsafe.Pointer(&value)))
var (
key = mdbx.Val{
Base: &tx.buffer[0],
Len: 20,
}
data mdbx.Val
)
if err = tx.index.Get(&key, &data, mdbx.CursorSetRange); err != mdbx.ErrSuccess {
if err == mdbx.ErrNotFound {
return nil
}
return err
}
err = nil
keyBytes := key.UnsafeBytes()
if key.Len == 20 &&
*(*uint32)(unsafe.Pointer(&keyBytes[0])) == i64.IndexMeta.ID &&
DocID(binary.BigEndian.Uint64(keyBytes[4:])) == tx.docID &&
bigEndianI64(keyBytes[12:]) == value {
if err = tx.index.Delete(0); err != mdbx.ErrSuccess {
return err
} else {
err = nil
}
}
return nil
}