mirror of
https://github.com/go-gitea/gitea
synced 2024-11-14 06:04:25 +00:00
84 lines
2.1 KiB
Go
84 lines
2.1 KiB
Go
|
package roaring
|
||
|
|
|
||
|
|
import (
|
||
|
|
"encoding/binary"
|
||
|
|
"errors"
|
||
|
|
"fmt"
|
||
|
|
"io"
|
||
|
|
|
||
|
|
"github.com/tinylib/msgp/msgp"
|
||
|
|
)
|
||
|
|
|
||
|
|
// writeTo for runContainer16 follows this
|
||
|
|
// spec: https://github.com/RoaringBitmap/RoaringFormatSpec
|
||
|
|
//
|
||
|
|
func (b *runContainer16) writeTo(stream io.Writer) (int, error) {
|
||
|
|
buf := make([]byte, 2+4*len(b.iv))
|
||
|
|
binary.LittleEndian.PutUint16(buf[0:], uint16(len(b.iv)))
|
||
|
|
for i, v := range b.iv {
|
||
|
|
binary.LittleEndian.PutUint16(buf[2+i*4:], v.start)
|
||
|
|
binary.LittleEndian.PutUint16(buf[2+2+i*4:], v.length)
|
||
|
|
}
|
||
|
|
return stream.Write(buf)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (b *runContainer32) writeToMsgpack(stream io.Writer) (int, error) {
|
||
|
|
bts, err := b.MarshalMsg(nil)
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
return stream.Write(bts)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (b *runContainer16) writeToMsgpack(stream io.Writer) (int, error) {
|
||
|
|
bts, err := b.MarshalMsg(nil)
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
return stream.Write(bts)
|
||
|
|
}
|
||
|
|
|
||
|
|
func (b *runContainer32) readFromMsgpack(stream io.Reader) (int, error) {
|
||
|
|
err := msgp.Decode(stream, b)
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
|
||
|
|
func (b *runContainer16) readFromMsgpack(stream io.Reader) (int, error) {
|
||
|
|
err := msgp.Decode(stream, b)
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
|
||
|
|
var errCorruptedStream = errors.New("insufficient/odd number of stored bytes, corrupted stream detected")
|
||
|
|
|
||
|
|
func (b *runContainer16) readFrom(stream io.Reader) (int, error) {
|
||
|
|
b.iv = b.iv[:0]
|
||
|
|
b.card = 0
|
||
|
|
var numRuns uint16
|
||
|
|
err := binary.Read(stream, binary.LittleEndian, &numRuns)
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
nr := int(numRuns)
|
||
|
|
encRun := make([]uint16, 2*nr)
|
||
|
|
by := make([]byte, 4*nr)
|
||
|
|
err = binary.Read(stream, binary.LittleEndian, &by)
|
||
|
|
if err != nil {
|
||
|
|
return 0, err
|
||
|
|
}
|
||
|
|
for i := range encRun {
|
||
|
|
if len(by) < 2 {
|
||
|
|
return 0, errCorruptedStream
|
||
|
|
}
|
||
|
|
encRun[i] = binary.LittleEndian.Uint16(by)
|
||
|
|
by = by[2:]
|
||
|
|
}
|
||
|
|
for i := 0; i < nr; i++ {
|
||
|
|
if i > 0 && b.iv[i-1].last() >= encRun[i*2] {
|
||
|
|
return 0, fmt.Errorf("error: stored runContainer had runs that were not in sorted order!! (b.iv[i-1=%v].last = %v >= encRun[i=%v] = %v)", i-1, b.iv[i-1].last(), i, encRun[i*2])
|
||
|
|
}
|
||
|
|
b.iv = append(b.iv, interval16{start: encRun[i*2], length: encRun[i*2+1]})
|
||
|
|
b.card += int64(encRun[i*2+1]) + 1
|
||
|
|
}
|
||
|
|
return 0, err
|
||
|
|
}
|