/
InputStreamCheckpoint.go
37 lines (30 loc) · 1.36 KB
/
InputStreamCheckpoint.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
package store
import "github.com/mothdb-bd/orc-go/pkg/util"
func CreateInputStreamCheckpoint(compressed bool, positionsList *ColumnPositionsList) int64 {
if compressed {
return CreateInputStreamCheckpoint2(positionsList.NextPosition(), positionsList.NextPosition())
} else {
return CreateInputStreamCheckpoint2(0, positionsList.NextPosition())
}
}
func CreateInputStreamCheckpoint2(compressedBlockOffset int32, decompressedOffset int32) int64 {
return (int64(compressedBlockOffset) << 32) | int64(decompressedOffset)
}
func DecodeCompressedBlockOffset(inputStreamCheckpoint int64) int32 {
return int32(inputStreamCheckpoint >> 32)
}
func DecodeDecompressedOffset(inputStreamCheckpoint int64) int32 {
// low order bits contain the decompressed offset, so a simple cast here will suffice
return int32(inputStreamCheckpoint)
}
func CreateInputStreamPositionList(compressed bool, inputStreamCheckpoint int64) *util.ArrayList[int32] {
l := util.NewArrayList[int32]()
if compressed {
l.Add(DecodeCompressedBlockOffset(inputStreamCheckpoint), DecodeDecompressedOffset(inputStreamCheckpoint))
// return ImmutableList.of(DecodeCompressedBlockOffset(inputStreamCheckpoint), DecodeDecompressedOffset(inputStreamCheckpoint))
} else {
l.Add(DecodeDecompressedOffset(inputStreamCheckpoint))
// return ImmutableList.of(DecodeDecompressedOffset(inputStreamCheckpoint))
}
return l
}