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CRCWriter consistent with CRC

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This commit is contained in:
Chris Lu 2021-03-06 14:24:24 -08:00
parent 1444e9d275
commit 38fc200e56
1 changed files with 5 additions and 6 deletions
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11
weed/storage/needle/crc.go
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@ -2,7 +2,6 @@ package needle
import ( import (
"fmt" "fmt"
"hash"
"io" "io"
"github.com/klauspost/crc32" "github.com/klauspost/crc32"
@ -35,21 +34,21 @@ func (n *Needle) Etag() string {
func NewCRCwriter(w io.Writer) *CRCwriter { func NewCRCwriter(w io.Writer) *CRCwriter {
return &CRCwriter{ return &CRCwriter{
h: crc32.New(table), crc: CRC(0),
w: w, w: w,
} }
} }
type CRCwriter struct { type CRCwriter struct {
h hash.Hash32 crc CRC
w io.Writer w io.Writer
} }
func (c *CRCwriter) Write(p []byte) (n int, err error) { func (c *CRCwriter) Write(p []byte) (n int, err error) {
n, err = c.w.Write(p) // with each write ... n, err = c.w.Write(p) // with each write ...
c.h.Write(p) // ... update the hash c.crc = c.crc.Update(p)
return return
} }
func (c *CRCwriter) Sum() uint32 { return c.h.Sum32() } // final hash func (c *CRCwriter) Sum() uint32 { return c.crc.Value() } // final hash