forked from TrueCloudLab/frostfs-node
75 lines
1.5 KiB
Go
75 lines
1.5 KiB
Go
package container
|
|
|
|
import (
|
|
"encoding/binary"
|
|
"io"
|
|
|
|
"github.com/nspcc-dev/neofs-node/pkg/core/container/acl/basic"
|
|
)
|
|
|
|
const (
|
|
saltLenSize = 2
|
|
|
|
fixedSize = 0 +
|
|
basic.Size +
|
|
OwnerIDSize +
|
|
saltLenSize
|
|
)
|
|
|
|
// MarshalBinary encodes the container into a binary form
|
|
// and returns the result.
|
|
func (c *Container) MarshalBinary() ([]byte, error) {
|
|
data := make([]byte, binaryContainerSize(c))
|
|
|
|
off := copy(data, basic.Marshal(c.basicACL))
|
|
|
|
off += copy(data[off:], c.ownerID.Bytes())
|
|
|
|
binary.BigEndian.PutUint16(data[off:], uint16(len(c.salt)))
|
|
off += saltLenSize
|
|
|
|
off += copy(data[off:], c.salt)
|
|
|
|
if _, err := c.placementRule.MarshalTo(data[off:]); err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return data, nil
|
|
}
|
|
|
|
// UnmarshalBinary unmarshals container from a binary
|
|
// representation.
|
|
//
|
|
// If buffer size is insufficient, io.ErrUnexpectedEOF is returned.
|
|
func (c *Container) UnmarshalBinary(data []byte) error {
|
|
if len(data) < binaryContainerSize(c) {
|
|
return io.ErrUnexpectedEOF
|
|
}
|
|
|
|
if err := c.basicACL.UnmarshalBinary(data); err != nil {
|
|
return err
|
|
}
|
|
|
|
off := basic.Size
|
|
|
|
off += copy(c.ownerID[:], data[off:])
|
|
|
|
saltLen := binary.BigEndian.Uint16(data[off:])
|
|
off += saltLenSize
|
|
|
|
c.salt = make([]byte, saltLen)
|
|
off += copy(c.salt, data[off:])
|
|
|
|
if err := c.placementRule.Unmarshal(data[off:]); err != nil {
|
|
return err
|
|
}
|
|
|
|
return nil
|
|
}
|
|
|
|
// returns the length of the container in binary form.
|
|
func binaryContainerSize(cnr *Container) int {
|
|
return fixedSize +
|
|
len(cnr.salt) +
|
|
cnr.placementRule.Size()
|
|
}
|