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amt_internal.go
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/
amt_internal.go
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// Copied from go-amt-ipld https://github.com/filecoin-project/go-amt-ipld/tree/master/internal
// which for some reason is a go internal package and therefore cannot be imported
package main
import (
"fmt"
"io"
"math"
"sort"
cid "github.com/ipfs/go-cid"
cbg "github.com/whyrusleeping/cbor-gen"
xerrors "golang.org/x/xerrors"
)
type AMTRoot struct {
BitWidth uint64
Height uint64
Count uint64
AMTNode AMTNode
}
type AMTNode struct {
Bmap []byte
Links []cid.Cid
Values []*cbg.Deferred
}
// Code generated by github.com/whyrusleeping/cbor-gen. DO NOT EDIT.
var _ = xerrors.Errorf
var _ = cid.Undef
var _ = math.E
var _ = sort.Sort
var lengthBufAMTRoot = []byte{132}
func (t *AMTRoot) MarshalCBOR(w io.Writer) error {
if t == nil {
_, err := w.Write(cbg.CborNull)
return err
}
cw := cbg.NewCborWriter(w)
if _, err := cw.Write(lengthBufAMTRoot); err != nil {
return err
}
// t.BitWidth (uint64) (uint64)
if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, t.BitWidth); err != nil {
return err
}
// t.Height (uint64) (uint64)
if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, t.Height); err != nil {
return err
}
// t.Count (uint64) (uint64)
if err := cw.WriteMajorTypeHeader(cbg.MajUnsignedInt, t.Count); err != nil {
return err
}
// t.AMTNode (internal.AMTNode) (struct)
if err := t.AMTNode.MarshalCBOR(cw); err != nil {
return err
}
return nil
}
func (t *AMTRoot) UnmarshalCBOR(r io.Reader) (err error) {
*t = AMTRoot{}
cr := cbg.NewCborReader(r)
maj, extra, err := cr.ReadHeader()
if err != nil {
return err
}
defer func() {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
}()
if maj != cbg.MajArray {
return fmt.Errorf("cbor input should be of type array")
}
if extra != 4 {
return fmt.Errorf("cbor input had wrong number of fields")
}
// t.BitWidth (uint64) (uint64)
{
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if maj != cbg.MajUnsignedInt {
return fmt.Errorf("wrong type for uint64 field")
}
t.BitWidth = extra
}
// t.Height (uint64) (uint64)
{
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if maj != cbg.MajUnsignedInt {
return fmt.Errorf("wrong type for uint64 field")
}
t.Height = extra
}
// t.Count (uint64) (uint64)
{
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if maj != cbg.MajUnsignedInt {
return fmt.Errorf("wrong type for uint64 field")
}
t.Count = extra
}
// t.AMTNode (internal.AMTNode) (struct)
{
if err := t.AMTNode.UnmarshalCBOR(cr); err != nil {
return xerrors.Errorf("unmarshaling t.AMTNode: %w", err)
}
}
return nil
}
var lengthBufAMTNode = []byte{131}
func (t *AMTNode) MarshalCBOR(w io.Writer) error {
if t == nil {
_, err := w.Write(cbg.CborNull)
return err
}
cw := cbg.NewCborWriter(w)
if _, err := cw.Write(lengthBufAMTNode); err != nil {
return err
}
// t.Bmap ([]uint8) (slice)
if len(t.Bmap) > cbg.ByteArrayMaxLen {
return xerrors.Errorf("Byte array in field t.Bmap was too long")
}
if err := cw.WriteMajorTypeHeader(cbg.MajByteString, uint64(len(t.Bmap))); err != nil {
return err
}
if _, err := cw.Write(t.Bmap[:]); err != nil {
return err
}
// t.Links ([]cid.Cid) (slice)
if len(t.Links) > cbg.MaxLength {
return xerrors.Errorf("Slice value in field t.Links was too long")
}
if err := cw.WriteMajorTypeHeader(cbg.MajArray, uint64(len(t.Links))); err != nil {
return err
}
for _, v := range t.Links {
if err := cbg.WriteCid(w, v); err != nil {
return xerrors.Errorf("failed writing cid field t.Links: %w", err)
}
}
// t.Values ([]*typegen.Deferred) (slice)
if len(t.Values) > cbg.MaxLength {
return xerrors.Errorf("Slice value in field t.Values was too long")
}
if err := cw.WriteMajorTypeHeader(cbg.MajArray, uint64(len(t.Values))); err != nil {
return err
}
for _, v := range t.Values {
if err := v.MarshalCBOR(cw); err != nil {
return err
}
}
return nil
}
func (t *AMTNode) UnmarshalCBOR(r io.Reader) (err error) {
*t = AMTNode{}
cr := cbg.NewCborReader(r)
maj, extra, err := cr.ReadHeader()
if err != nil {
return err
}
defer func() {
if err == io.EOF {
err = io.ErrUnexpectedEOF
}
}()
if maj != cbg.MajArray {
return fmt.Errorf("cbor input should be of type array")
}
if extra != 3 {
return fmt.Errorf("cbor input had wrong number of fields")
}
// t.Bmap ([]uint8) (slice)
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if extra > cbg.ByteArrayMaxLen {
return fmt.Errorf("t.Bmap: byte array too large (%d)", extra)
}
if maj != cbg.MajByteString {
return fmt.Errorf("expected byte array")
}
if extra > 0 {
t.Bmap = make([]uint8, extra)
}
if _, err := io.ReadFull(cr, t.Bmap[:]); err != nil {
return err
}
// t.Links ([]cid.Cid) (slice)
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if extra > cbg.MaxLength {
return fmt.Errorf("t.Links: array too large (%d)", extra)
}
if maj != cbg.MajArray {
return fmt.Errorf("expected cbor array")
}
if extra > 0 {
t.Links = make([]cid.Cid, extra)
}
for i := 0; i < int(extra); i++ {
c, err := cbg.ReadCid(cr)
if err != nil {
return xerrors.Errorf("reading cid field t.Links failed: %w", err)
}
t.Links[i] = c
}
// t.Values ([]*typegen.Deferred) (slice)
maj, extra, err = cr.ReadHeader()
if err != nil {
return err
}
if extra > cbg.MaxLength {
return fmt.Errorf("t.Values: array too large (%d)", extra)
}
if maj != cbg.MajArray {
return fmt.Errorf("expected cbor array")
}
if extra > 0 {
t.Values = make([]*cbg.Deferred, extra)
}
for i := 0; i < int(extra); i++ {
var v cbg.Deferred
if err := v.UnmarshalCBOR(cr); err != nil {
return err
}
t.Values[i] = &v
}
return nil
}