[#1064] putsvc: Add EC put

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/core/container/ec.go

@@ -0,0 +1,11 @@
+package container
+
+import (
+	"git.frostfs.info/TrueCloudLab/frostfs-node/pkg/core/policy"
+	containerSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/container"
+)
+
+// IsECContainer returns True if container has erasure coding policy.
+func IsECContainer(cnr containerSDK.Container) bool {
+	return policy.IsECPlacement(cnr.PlacementPolicy())
+}

pkg/core/object/ec.go

@@ -0,0 +1,13 @@
+package object
+
+import (
+	objectSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/object"
+)
+
+// IsECSupported returns True if EC supported for object.
+//
+// EC supported only for regular, not linking objects.
+func IsECSupported(obj *objectSDK.Object) bool {
+	return obj.Type() == objectSDK.TypeRegular &&
+		len(obj.Children()) == 0
+}

pkg/core/policy/ec.go

@@ -0,0 +1,20 @@
+package policy
+
+import (
+	netmapSDK "git.frostfs.info/TrueCloudLab/frostfs-sdk-go/netmap"
+)
+
+// IsECPlacement returns True if policy is erasure coding policy.
+func IsECPlacement(policy netmapSDK.PlacementPolicy) bool {
+	return policy.NumberOfReplicas() == 1 && policy.ReplicaDescriptor(0).GetECDataCount() > 0
+}
+
+// ECDataCount returns EC data count for EC placement policy.
+func ECDataCount(policy netmapSDK.PlacementPolicy) int {
+	return int(policy.ReplicaDescriptor(0).GetECDataCount())
+}
+
+// ECParityCount returns EC parity count for EC placement policy.
+func ECParityCount(policy netmapSDK.PlacementPolicy) int {
+	return int(policy.ReplicaDescriptor(0).GetECParityCount())
+}