Fuse SUCCESS

internal/data/fullreader.go

@@ -79,6 +79,91 @@ func (r FullReader) process(index int, offset int64, out chan outDat) {
 	}
 }
 
+func (r FullReader) ReadAt(p []byte, off int64) (n int, err error) {
+	out := make(chan outDat, len(r.sizes))
+	offset := r.start
+	num := len(r.sizes)
+	start := off / int64(r.blockSize)
+	end := len(p) / int(r.blockSize)
+	if end%int(r.blockSize) > 0 {
+		end++
+	}
+	if end > len(r.sizes) {
+		if r.fragRdr != nil {
+			end = len(r.sizes)
+		} else {
+			end = len(r.sizes) + 1
+		}
+	}
+	for i := 0; i < num; i++ {
+		if i < int(start) || i > end {
+			offset += uint64(realSize(r.sizes[i]))
+			continue
+		}
+		if i == num-1 && r.fragRdr != nil {
+			go func() {
+				rdr, e := r.fragRdr()
+				if err != nil {
+					out <- outDat{
+						i:   num - 1,
+						err: e,
+					}
+					return
+				}
+				dat, e := io.ReadAll(rdr)
+				out <- outDat{
+					i:    num - 1,
+					err:  e,
+					data: dat,
+				}
+				if clr, ok := rdr.(io.Closer); ok {
+					clr.Close()
+				}
+			}()
+			continue
+		}
+		go r.process(i, int64(offset), out)
+		offset += uint64(realSize(r.sizes[i]))
+	}
+	cache := make(map[int]outDat)
+	for cur := start; cur < int64(end); {
+		dat := <-out
+		if dat.err != nil {
+			err = dat.err
+			return
+		}
+		if dat.i != int(cur) {
+			cache[dat.i] = dat
+			continue
+		}
+		if cur == start {
+			dat.data = dat.data[off%int64(r.blockSize):]
+		}
+		for i := range dat.data {
+			p[n+i] = dat.data[i]
+		}
+		n += len(dat.data)
+		cur++
+		var ok bool
+		for {
+			dat, ok = cache[int(cur)]
+			if !ok {
+				break
+			}
+			for i := range dat.data {
+				p[n+i] = dat.data[i]
+			}
+			n += len(dat.data)
+			cur++
+			delete(cache, int(cur))
+		}
+	}
+	if n < len(p) {
+		err = io.EOF
+	}
+	return
+}
+
 func (r FullReader) WriteTo(w io.Writer) (n int64, err error) {
 	out := make(chan outDat, len(r.sizes))
 	offset := r.start

internal/directory/directory.go

@@ -29,6 +29,7 @@ type Entry struct {
 	BlockStart uint32
 	Type       uint16
 	Offset     uint16
+	Num        uint32
 }
 
 func readEntry(r io.Reader) (e entry, err error) {
@@ -72,6 +73,7 @@ func ReadEntries(rdr io.Reader, size uint32) (e []Entry, err error) {
 				BlockStart: h.InodeStart,
 				Type:       en.Type,
 				Offset:     en.Offset,
+				Num:        h.Num + uint32(en.NumOffset),
 			})
 		}
 	}

internal/inode/inode.go

@@ -4,6 +4,7 @@ import (
 	"encoding/binary"
 	"errors"
 	"io"
+	"io/fs"
 	"strconv"
 )
 
@@ -77,3 +78,66 @@ func Read(r io.Reader, blockSize uint32) (i Inode, err error) {
 	}
 	return
 }
+
+func (i Inode) Mode() (out fs.FileMode) {
+	out = fs.FileMode(i.Perm)
+	switch i.Data.(type) {
+	case Directory:
+		out |= fs.ModeDir
+	case EDirectory:
+		out |= fs.ModeDir
+	case Symlink:
+		out |= fs.ModeSymlink
+	case ESymlink:
+		out |= fs.ModeSymlink
+	case Device:
+		out |= fs.ModeDevice
+	case EDevice:
+		out |= fs.ModeDevice
+	case IPC:
+		out |= fs.ModeNamedPipe
+	case EIPC:
+		out |= fs.ModeNamedPipe
+	}
+	return
+}
+
+func (i Inode) LinkCount() uint32 {
+	switch i.Data.(type) {
+	case EFile:
+		return i.Data.(EFile).LinkCount
+	case Directory:
+		return i.Data.(Directory).LinkCount
+	case EDirectory:
+		return i.Data.(EDirectory).LinkCount
+	case Device:
+		return i.Data.(Device).LinkCount
+	case EDevice:
+		return i.Data.(EDevice).LinkCount
+	case IPC:
+		return i.Data.(IPC).LinkCount
+	case EIPC:
+		return i.Data.(EIPC).LinkCount
+	case Symlink:
+		return i.Data.(Symlink).LinkCount
+	case ESymlink:
+		return i.Data.(ESymlink).LinkCount
+	default:
+		return 0
+	}
+}
+
+func (i Inode) Size() uint64 {
+	switch i.Data.(type) {
+	case File:
+		return uint64(i.Data.(File).Size)
+	case EFile:
+		return i.Data.(EFile).Size
+	// case Directory:
+	// 	return uint64(i.Data.(Directory).Size)
+	// case EDirectory:
+	// 	return uint64(i.Data.(EDirectory).Size)
+	default:
+		return 0
+	}
+}