Rename squashfs/squashfs to squashfs/low

squashfs/low library name is now squashfslow

low/directory/directory.go

@@ -0,0 +1,60 @@
+package directory
+
+import (
+	"encoding/binary"
+	"io"
+)
+
+type header struct {
+	Count      uint32
+	BlockStart uint32
+	Num        uint32
+}
+
+type decEntry struct {
+	Offset    uint16
+	NumOffset int16
+	InodeType uint16
+	NameSize  uint16
+	// Name []byte (not decoded along with decEntry)
+}
+
+type Entry struct {
+	Name       string
+	BlockStart uint32
+	Offset     uint16
+	InodeType  uint16
+}
+
+func ReadDirectory(r io.Reader, size uint32) (out []Entry, err error) {
+	size -= 3
+	var curRead uint32
+	var h header
+	var de decEntry
+	for curRead < size {
+		err = binary.Read(r, binary.LittleEndian, &h)
+		if err != nil {
+			return
+		}
+		curRead += 12
+		for i := uint32(0); i < h.Count+1 && curRead < size; i++ {
+			err = binary.Read(r, binary.LittleEndian, &de)
+			if err != nil {
+				return
+			}
+			nameTmp := make([]byte, de.NameSize+1)
+			err = binary.Read(r, binary.LittleEndian, &nameTmp)
+			if err != nil {
+				return
+			}
+			curRead += 8 + uint32(de.NameSize) + 1
+			out = append(out, Entry{
+				BlockStart: h.BlockStart,
+				Offset:     de.Offset,
+				Name:       string(nameTmp),
+				InodeType:  de.InodeType,
+			})
+		}
+	}
+	return
+}