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lib/mergeset: use unsafe.Slice and unsafe.String instead of deprecated reflect.SliceHeader with unsafe conversion from slice header to string header

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Aliaksandr Valialkin 2024-02-29 17:29:33 +02:00
parent 99269ea640
commit 01d8bee14c
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1 changed files with 3 additions and 10 deletions
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13
lib/mergeset/encoding.go
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@ -4,7 +4,6 @@ import (
"bytes" "bytes"
"fmt" "fmt"
"os" "os"
"reflect"
"sort" "sort"
"strings" "strings"
"sync" "sync"
@ -29,21 +28,15 @@ type Item struct {
// The returned bytes representation belongs to data. // The returned bytes representation belongs to data.
func (it Item) Bytes(data []byte) []byte { func (it Item) Bytes(data []byte) []byte {
n := int(it.End - it.Start) n := int(it.End - it.Start)
sh := (*reflect.SliceHeader)(unsafe.Pointer(&data)) return unsafe.Slice((*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(unsafe.SliceData(data)))+uintptr(it.Start))), n)
sh.Cap = n
sh.Len = n
sh.Data += uintptr(it.Start)
return data
} }
// String returns string representation of it obtained from data. // String returns string representation of it obtained from data.
// //
// The returned string representation belongs to data. // The returned string representation belongs to data.
func (it Item) String(data []byte) string { func (it Item) String(data []byte) string {
sh := (*reflect.SliceHeader)(unsafe.Pointer(&data)) n := int(it.End - it.Start)
sh.Data += uintptr(it.Start) return unsafe.String((*byte)(unsafe.Pointer(uintptr(unsafe.Pointer(unsafe.SliceData(data)))+uintptr(it.Start))), n)
sh.Len = int(it.End - it.Start)
return *(*string)(unsafe.Pointer(sh))
} }
func (ib *inmemoryBlock) Len() int { func (ib *inmemoryBlock) Len() int {