mirror of
https://github.com/go-gitea/gitea.git
synced 2024-12-06 01:24:16 +08:00
f5abe2f563
* Upgrade blevesearch dependency to v2.0.1 * Update rupture to v1.0.0 * Fix test
146 lines
3.6 KiB
Go
Vendored
146 lines
3.6 KiB
Go
Vendored
// Copyright (c) 2017 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.
|
|
|
|
package zap
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"io"
|
|
|
|
"github.com/RoaringBitmap/roaring"
|
|
)
|
|
|
|
// writes out the length of the roaring bitmap in bytes as varint
|
|
// then writes out the roaring bitmap itself
|
|
func writeRoaringWithLen(r *roaring.Bitmap, w io.Writer,
|
|
reuseBufVarint []byte) (int, error) {
|
|
buf, err := r.ToBytes()
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
var tw int
|
|
|
|
// write out the length
|
|
n := binary.PutUvarint(reuseBufVarint, uint64(len(buf)))
|
|
nw, err := w.Write(reuseBufVarint[:n])
|
|
tw += nw
|
|
if err != nil {
|
|
return tw, err
|
|
}
|
|
|
|
// write out the roaring bytes
|
|
nw, err = w.Write(buf)
|
|
tw += nw
|
|
if err != nil {
|
|
return tw, err
|
|
}
|
|
|
|
return tw, nil
|
|
}
|
|
|
|
func persistFields(fieldsInv []string, w *CountHashWriter, dictLocs []uint64) (uint64, error) {
|
|
var rv uint64
|
|
var fieldsOffsets []uint64
|
|
|
|
for fieldID, fieldName := range fieldsInv {
|
|
// record start of this field
|
|
fieldsOffsets = append(fieldsOffsets, uint64(w.Count()))
|
|
|
|
// write out the dict location and field name length
|
|
_, err := writeUvarints(w, dictLocs[fieldID], uint64(len(fieldName)))
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
|
|
// write out the field name
|
|
_, err = w.Write([]byte(fieldName))
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
}
|
|
|
|
// now write out the fields index
|
|
rv = uint64(w.Count())
|
|
for fieldID := range fieldsInv {
|
|
err := binary.Write(w, binary.BigEndian, fieldsOffsets[fieldID])
|
|
if err != nil {
|
|
return 0, err
|
|
}
|
|
}
|
|
|
|
return rv, nil
|
|
}
|
|
|
|
// FooterSize is the size of the footer record in bytes
|
|
// crc + ver + chunk + field offset + stored offset + num docs + docValueOffset
|
|
const FooterSize = 4 + 4 + 4 + 8 + 8 + 8 + 8
|
|
|
|
func persistFooter(numDocs, storedIndexOffset, fieldsIndexOffset, docValueOffset uint64,
|
|
chunkMode uint32, crcBeforeFooter uint32, writerIn io.Writer) error {
|
|
w := NewCountHashWriter(writerIn)
|
|
w.crc = crcBeforeFooter
|
|
|
|
// write out the number of docs
|
|
err := binary.Write(w, binary.BigEndian, numDocs)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// write out the stored field index location:
|
|
err = binary.Write(w, binary.BigEndian, storedIndexOffset)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// write out the field index location
|
|
err = binary.Write(w, binary.BigEndian, fieldsIndexOffset)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// write out the fieldDocValue location
|
|
err = binary.Write(w, binary.BigEndian, docValueOffset)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// write out 32-bit chunk factor
|
|
err = binary.Write(w, binary.BigEndian, chunkMode)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// write out 32-bit version
|
|
err = binary.Write(w, binary.BigEndian, Version)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
// write out CRC-32 of everything upto but not including this CRC
|
|
err = binary.Write(w, binary.BigEndian, w.crc)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func writeUvarints(w io.Writer, vals ...uint64) (tw int, err error) {
|
|
buf := make([]byte, binary.MaxVarintLen64)
|
|
for _, val := range vals {
|
|
n := binary.PutUvarint(buf, val)
|
|
var nw int
|
|
nw, err = w.Write(buf[:n])
|
|
tw += nw
|
|
if err != nil {
|
|
return tw, err
|
|
}
|
|
}
|
|
return tw, err
|
|
}
|