mirror of
https://github.com/octoleo/syncthing.git
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125 lines
2.8 KiB
Go
125 lines
2.8 KiB
Go
// Copyright (C) 2014 The Protocol Authors.
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//go:generate go run ../../script/protofmt.go bep.proto
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//go:generate protoc --proto_path=../../../../../:../../../../gogo/protobuf/protobuf:. --gogofast_out=. bep.proto
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package protocol
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import (
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"bytes"
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"crypto/sha256"
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"encoding/binary"
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"errors"
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"fmt"
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"github.com/syncthing/syncthing/lib/rand"
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)
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var (
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sha256OfEmptyBlock = sha256.Sum256(make([]byte, BlockSize))
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HelloMessageMagic = uint32(0x2EA7D90B)
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)
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func (m Hello) Magic() uint32 {
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return HelloMessageMagic
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}
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func (f FileInfo) String() string {
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return fmt.Sprintf("File{Name:%q, Type:%v, Sequence:%d, Permissions:0%o, Modified:%d, Version:%v, Length:%d, Deleted:%v, Invalid:%v, NoPermissions:%v, Blocks:%v}",
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f.Name, f.Type, f.Sequence, f.Permissions, f.Modified, f.Version, f.Size, f.Deleted, f.Invalid, f.NoPermissions, f.Blocks)
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}
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func (f FileInfo) IsDeleted() bool {
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return f.Deleted
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}
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func (f FileInfo) IsInvalid() bool {
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return f.Invalid
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}
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func (f FileInfo) IsDirectory() bool {
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return f.Type == FileInfoTypeDirectory
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}
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func (f FileInfo) IsSymlink() bool {
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switch f.Type {
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case FileInfoTypeSymlinkDirectory, FileInfoTypeSymlinkFile, FileInfoTypeSymlinkUnknown:
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return true
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default:
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return false
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}
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}
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func (f FileInfo) HasPermissionBits() bool {
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return !f.NoPermissions
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}
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func (f FileInfo) FileSize() int64 {
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if f.IsDirectory() || f.IsDeleted() {
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return 128
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}
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return f.Size
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}
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func (f FileInfo) FileName() string {
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return f.Name
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}
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// WinsConflict returns true if "f" is the one to choose when it is in
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// conflict with "other".
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func (f FileInfo) WinsConflict(other FileInfo) bool {
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// If a modification is in conflict with a delete, we pick the
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// modification.
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if !f.IsDeleted() && other.IsDeleted() {
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return true
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}
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if f.IsDeleted() && !other.IsDeleted() {
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return false
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}
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// The one with the newer modification time wins.
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if f.Modified > other.Modified {
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return true
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}
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if f.Modified < other.Modified {
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return false
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}
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// The modification times were equal. Use the device ID in the version
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// vector as tie breaker.
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return f.Version.Compare(other.Version) == ConcurrentGreater
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}
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func (b BlockInfo) String() string {
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return fmt.Sprintf("Block{%d/%d/%x}", b.Offset, b.Size, b.Hash)
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}
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// IsEmpty returns true if the block is a full block of zeroes.
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func (b BlockInfo) IsEmpty() bool {
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return b.Size == BlockSize && bytes.Equal(b.Hash, sha256OfEmptyBlock[:])
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}
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type IndexID uint64
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func (i IndexID) String() string {
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return fmt.Sprintf("0x%16X", uint64(i))
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}
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func (i IndexID) Marshal() ([]byte, error) {
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bs := make([]byte, 8)
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binary.BigEndian.PutUint64(bs, uint64(i))
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return bs, nil
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}
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func (i *IndexID) Unmarshal(bs []byte) error {
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if len(bs) != 8 {
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return errors.New("incorrect IndexID length")
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}
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*i = IndexID(binary.BigEndian.Uint64(bs))
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return nil
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}
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func NewIndexID() IndexID {
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return IndexID(rand.Int64())
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}
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