frostfs-sdk-go/subnet/id/id.go

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package subnetid
import (
"fmt"
"strconv"
"git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs"
)
// ID represents unique identifier of the subnet in the FrostFS network.
//
// ID is mutually compatible with git.frostfs.info/TrueCloudLab/frostfs-api-go/v2/refs.SubnetID
// message. See ReadFromV2 / WriteToV2 methods.
//
// Instances can be created using built-in var declaration. Zero value is
// equivalent to identifier of the zero subnet (whole FrostFS network).
type ID struct {
m refs.SubnetID
}
// ReadFromV2 reads ID from the refs.SubnetID message. Checks if the
// message conforms to FrostFS API V2 protocol.
//
// See also WriteToV2.
func (x *ID) ReadFromV2(msg refs.SubnetID) error {
x.m = msg
return nil
}
// WriteToV2 writes ID to refs.SubnetID message structure. The message MUST NOT
// be nil.
//
// See also ReadFromV2.
func (x ID) WriteToV2(msg *refs.SubnetID) {
*msg = x.m
}
// Equals defines a comparison relation between two ID instances.
//
// Note that comparison using '==' operator is not recommended since it MAY result
// in loss of compatibility.
func (x ID) Equals(x2 ID) bool {
return x.m.GetValue() == x2.m.GetValue()
}
// EncodeToString encodes ID into FrostFS API protocol string (base10 encoding).
//
// See also DecodeString.
func (x ID) EncodeToString() string {
return strconv.FormatUint(uint64(x.m.GetValue()), 10)
}
// DecodeString decodes string calculated using EncodeToString. Returns
// an error if s is malformed.
func (x *ID) DecodeString(s string) error {
num, err := strconv.ParseUint(s, 10, 32)
if err != nil {
return fmt.Errorf("invalid numeric value: %w", err)
}
x.m.SetValue(uint32(num))
return nil
}
// String implements fmt.Stringer.
//
// String is designed to be human-readable, and its format MAY differ between
// SDK versions. String MAY return same result as EncodeToString. String MUST NOT
// be used to encode ID into FrostFS protocol string.
func (x ID) String() string {
return "#" + strconv.FormatUint(uint64(x.m.GetValue()), 10)
}
// Marshal encodes ID into a binary format of the FrostFS API protocol
// (Protocol Buffers with direct field order).
//
// See also Unmarshal.
func (x ID) Marshal() []byte {
return x.m.StableMarshal(nil)
}
// Unmarshal decodes binary ID calculated using Marshal. Returns an error
// describing a format violation.
func (x *ID) Unmarshal(data []byte) error {
return x.m.Unmarshal(data)
}
// SetNumeric sets ID value in numeric format. By default, number is 0 which
// refers to the zero subnet.
func (x *ID) SetNumeric(num uint32) {
x.m.SetValue(num)
}
// IsZero compares id with zero subnet ID.
func IsZero(id ID) bool {
return id.Equals(ID{})
}
// MakeZero makes ID to refer to zero subnet.
//
// Makes no sense to call on zero value (e.g. declared using var).
func MakeZero(id *ID) {
id.SetNumeric(0)
}