frostfs-api-go/v2/acl/marshal.go
Alex Vanin d4336d8d5b Simplify marshal with nested structure helper
Signed-off-by: Alex Vanin <alexey@nspcc.ru>
2020-09-18 10:42:57 +03:00

246 lines
4.8 KiB
Go

package acl
import (
"github.com/nspcc-dev/neofs-api-go/util/proto"
)
const (
filterHeaderTypeField = 1
filterMatchTypeField = 2
filterNameField = 3
filterValueField = 4
targetTypeField = 1
targetKeysField = 2
recordOperationField = 1
recordActionField = 2
recordFiltersField = 3
recordTargetsField = 4
tableContainerIDField = 1
tableRecordsField = 2
)
// StableMarshal marshals unified acl table structure in a protobuf
// compatible way without field order shuffle.
func (t *Table) StableMarshal(buf []byte) ([]byte, error) {
if t == nil {
return []byte{}, nil
}
if buf == nil {
buf = make([]byte, t.StableSize())
}
var (
offset, n int
err error
)
n, err = proto.NestedStructureMarshal(tableContainerIDField, buf[offset:], t.cid)
if err != nil {
return nil, err
}
offset += n
for i := range t.records {
n, err = proto.NestedStructureMarshal(tableRecordsField, buf[offset:], t.records[i])
if err != nil {
return nil, err
}
offset += n
}
return buf, nil
}
// StableSize of acl table structure marshalled by StableMarshal function.
func (t *Table) StableSize() (size int) {
if t == nil {
return 0
}
size += proto.NestedStructureSize(tableContainerIDField, t.cid)
for i := range t.records {
size += proto.NestedStructureSize(tableRecordsField, t.records[i])
}
return size
}
// StableMarshal marshals unified acl record structure in a protobuf
// compatible way without field order shuffle.
func (r *Record) StableMarshal(buf []byte) ([]byte, error) {
if r == nil {
return []byte{}, nil
}
if buf == nil {
buf = make([]byte, r.StableSize())
}
var (
offset, n int
err error
)
n, err = proto.EnumMarshal(recordOperationField, buf[offset:], int32(r.op))
if err != nil {
return nil, err
}
offset += n
n, err = proto.EnumMarshal(recordActionField, buf[offset:], int32(r.action))
if err != nil {
return nil, err
}
offset += n
for i := range r.filters {
n, err = proto.NestedStructureMarshal(recordFiltersField, buf[offset:], r.filters[i])
if err != nil {
return nil, err
}
offset += n
}
for i := range r.targets {
n, err = proto.NestedStructureMarshal(recordTargetsField, buf[offset:], r.targets[i])
if err != nil {
return nil, err
}
offset += n
}
return buf, nil
}
// StableSize of acl record structure marshalled by StableMarshal function.
func (r *Record) StableSize() (size int) {
if r == nil {
return 0
}
size += proto.EnumSize(recordOperationField, int32(r.op))
size += proto.EnumSize(recordActionField, int32(r.op))
for i := range r.filters {
size += proto.NestedStructureSize(recordFiltersField, r.filters[i])
}
for i := range r.targets {
size += proto.NestedStructureSize(recordTargetsField, r.targets[i])
}
return size
}
// StableMarshal marshals unified header filter structure in a protobuf
// compatible way without field order shuffle.
func (f *HeaderFilter) StableMarshal(buf []byte) ([]byte, error) {
if f == nil {
return []byte{}, nil
}
if buf == nil {
buf = make([]byte, f.StableSize())
}
var (
offset, n int
err error
)
n, err = proto.EnumMarshal(filterHeaderTypeField, buf[offset:], int32(f.hdrType))
if err != nil {
return nil, err
}
offset += n
n, err = proto.EnumMarshal(filterMatchTypeField, buf[offset:], int32(f.matchType))
if err != nil {
return nil, err
}
offset += n
n, err = proto.StringMarshal(filterNameField, buf[offset:], f.name)
if err != nil {
return nil, err
}
offset += n
_, err = proto.StringMarshal(filterValueField, buf[offset:], f.value)
if err != nil {
return nil, err
}
return buf, nil
}
// StableSize of header filter structure marshalled by StableMarshal function.
func (f *HeaderFilter) StableSize() (size int) {
if f == nil {
return 0
}
size += proto.EnumSize(filterHeaderTypeField, int32(f.hdrType))
size += proto.EnumSize(filterMatchTypeField, int32(f.matchType))
size += proto.StringSize(filterNameField, f.name)
size += proto.StringSize(filterValueField, f.value)
return size
}
// StableMarshal marshals unified target info structure in a protobuf
// compatible way without field order shuffle.
func (t *TargetInfo) StableMarshal(buf []byte) ([]byte, error) {
if t == nil {
return []byte{}, nil
}
if buf == nil {
buf = make([]byte, t.StableSize())
}
var (
offset, n int
err error
)
n, err = proto.EnumMarshal(targetTypeField, buf[offset:], int32(t.target))
if err != nil {
return nil, err
}
offset += n
_, err = proto.RepeatedBytesMarshal(targetKeysField, buf[offset:], t.keys)
if err != nil {
return nil, err
}
return buf, nil
}
// StableSize of target info structure marshalled by StableMarshal function.
func (t *TargetInfo) StableSize() (size int) {
if t == nil {
return 0
}
size += proto.EnumSize(targetTypeField, int32(t.target))
size += proto.RepeatedBytesSize(targetKeysField, t.keys)
return size
}