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use better math

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This commit is contained in:
whyrusleeping 2019-11-05 15:57:46 -08:00
parent ba1e8c6668
commit 87616e1c03
1 changed files with 5 additions and 5 deletions
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10
storage/sector/store.go
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@ -1,10 +1,11 @@
package sector package sector
import ( import (
"bytes"
"context" "context"
"fmt" "fmt"
"io" "io"
"math" "math/bits"
"sync" "sync"
"github.com/filecoin-project/go-sectorbuilder/sealing_state" "github.com/filecoin-project/go-sectorbuilder/sealing_state"
@ -61,16 +62,15 @@ func (s *Store) SectorStatus(sid uint64) (*sectorbuilder.SectorSealingStatus, er
} }
func computePaddedSize(size uint64) uint64 { func computePaddedSize(size uint64) uint64 {
// TODO: there is a better way to compute the log2 of an integer... i'm just lazy logv := 64 - bits.LeadingZeros64(size)
logv := uint64(math.Log2(float64(size)))
sectSize := uint64(1 << (logv + 1)) sectSize := uint64(1 << logv)
bound := sectorbuilder.UserBytesForSectorSize(sectSize) bound := sectorbuilder.UserBytesForSectorSize(sectSize)
if size <= bound { if size <= bound {
return bound return bound
} }
return sectorbuilder.UserBytesForSectorSize(1 << (logv + 2)) return sectorbuilder.UserBytesForSectorSize(1 << (logv + 1))
} }
type nullReader struct{} type nullReader struct{}