[#69] util: Rename stableMarshaler

It should be with a single `l`, see `json.Marshaler`.

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

session/marshal.go

@@ -211,7 +211,7 @@ func (c *ObjectSessionContext) StableMarshal(buf []byte) []byte {
 	}
 
 	offset := proto.EnumMarshal(objectCtxVerbField, buf, int32(c.verb))
-	proto.NestedStructureMarshal(objectCtxTargetField, buf[offset:], objectSessionContextTarget{
+	proto.NestedStructureMarshalUnchecked(objectCtxTargetField, buf[offset:], objectSessionContextTarget{
 		cnr:  c.cnr,
 		objs: c.objs,
 	})
@@ -225,7 +225,7 @@ func (c *ObjectSessionContext) StableSize() (size int) {
 	}
 
 	size += proto.EnumSize(objectCtxVerbField, int32(c.verb))
-	size += proto.NestedStructureSize(objectCtxTargetField, objectSessionContextTarget{
+	size += proto.NestedStructureSizeUnchecked(objectCtxTargetField, objectSessionContextTarget{
 		cnr:  c.cnr,
 		objs: c.objs,
 	})

util/proto/marshal.go

@@ -15,7 +15,7 @@ import (
 )
 
 type (
-	stableMarshaller interface {
+	stableMarshaler interface {
 		StableMarshal([]byte) []byte
 		StableSize() int
 	}
@@ -249,12 +249,21 @@ func VarUIntSize(x uint64) int {
 	return (bits.Len64(x|1) + 6) / 7
 }
 
-func NestedStructureMarshal[T stableMarshaller](field int64, buf []byte, v T) int {
-	n := v.StableSize()
-	if n == 0 {
+type ptrStableMarshaler[T any] interface {
+	stableMarshaler
+	~*T
+}
+
+func NestedStructureMarshal[T any, M ptrStableMarshaler[T]](field int64, buf []byte, v M) int {
+	if v == nil {
 		return 0
 	}
 
+	return NestedStructureMarshalUnchecked(field, buf, v)
+}
+
+func NestedStructureMarshalUnchecked[T stableMarshaler](field int64, buf []byte, v T) int {
+	n := v.StableSize()
 	prefix := protowire.EncodeTag(protowire.Number(field), protowire.BytesType)
 	offset := binary.PutUvarint(buf, prefix)
 	offset += binary.PutUvarint(buf[offset:], uint64(n))
@@ -263,13 +272,17 @@ func NestedStructureMarshal[T stableMarshaller](field int64, buf []byte, v T) in
 	return offset + n
 }
 
-func NestedStructureSize[T stableMarshaller](field int64, v T) (size int) {
-	n := v.StableSize()
-	if n == 0 {
+func NestedStructureSize[T any, M ptrStableMarshaler[T]](field int64, v M) (size int) {
+	if v == nil {
 		return 0
 	}
-	size = protowire.SizeGroup(protowire.Number(field), protowire.SizeBytes(n))
-	return
+
+	return NestedStructureSizeUnchecked(field, v)
+}
+
+func NestedStructureSizeUnchecked[T stableMarshaler](field int64, v T) int {
+	n := v.StableSize()
+	return protowire.SizeGroup(protowire.Number(field), protowire.SizeBytes(n))
 }
 
 func Fixed64Marshal(field int, buf []byte, v uint64) int {