git.r.bdr.sh - rbdr/mobius/blob - hotline/file_name_with_info.go

   1 package hotline
   2
   3 import (
   4         "bytes"
   5         "encoding/binary"
   6 )
   7
   8 type FileNameWithInfo struct {
   9         fileNameWithInfoHeader
  10         name []byte // File name
  11 }
  12
  13 // fileNameWithInfoHeader contains the fixed length fields of FileNameWithInfo
  14 type fileNameWithInfoHeader struct {
  15         Type       [4]byte // File type code
  16         Creator    [4]byte // File creator code
  17         FileSize   [4]byte // File Size in bytes
  18         RSVD       [4]byte
  19         NameScript [2]byte // ??
  20         NameSize   [2]byte // Length of name field
  21 }
  22
  23 func (f *fileNameWithInfoHeader) nameLen() int {
  24         return int(binary.BigEndian.Uint16(f.NameSize[:]))
  25 }
  26
  27 func (f *FileNameWithInfo) MarshalBinary() (data []byte, err error) {
  28         var buf bytes.Buffer
  29         err = binary.Write(&buf, binary.LittleEndian, f.fileNameWithInfoHeader)
  30         if err != nil {
  31                 return data, err
  32         }
  33
  34         _, err = buf.Write(f.name)
  35         if err != nil {
  36                 return data, err
  37         }
  38
  39         return buf.Bytes(), err
  40 }
  41
  42 func (f *FileNameWithInfo) UnmarshalBinary(data []byte) error {
  43         err := binary.Read(bytes.NewReader(data), binary.BigEndian, &f.fileNameWithInfoHeader)
  44         if err != nil {
  45                 return err
  46         }
  47         headerLen := binary.Size(f.fileNameWithInfoHeader)
  48         f.name = data[headerLen : headerLen+f.nameLen()]
  49
  50         return err
  51 }