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