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

   1 package hotline
   2
   3 import (
   4         "encoding/binary"
   5         "github.com/jhalter/mobius/concat"
   6 )
   7
   8 // FileNameWithInfo field content is presented in this structure:
   9 // Type 4               Folder (‘fldr’) or other
  10 // Creator      4
  11 // File size    4
  12 // 4            Reserved?
  13 // Name script  2
  14 // Name size    2
  15 // Name data    size
  16 type FileNameWithInfo struct {
  17         Type       []byte // file type code
  18         Creator    []byte // File creator code
  19         FileSize   []byte // File Size in bytes
  20         RSVD       []byte
  21         NameScript []byte // TODO: What is this?
  22         NameSize   []byte // Length of name field
  23         Name       []byte // File name
  24 }
  25
  26 func (f FileNameWithInfo) Payload() []byte {
  27         name := f.Name
  28         nameSize := make([]byte, 2)
  29         binary.BigEndian.PutUint16(nameSize, uint16(len(name)))
  30
  31         return concat.Slices(
  32                 f.Type,
  33                 f.Creator,
  34                 f.FileSize,
  35                 []byte{0, 0, 0, 0},
  36                 f.NameScript,
  37                 nameSize,
  38                 f.Name,
  39         )
  40 }
  41
  42 func (f *FileNameWithInfo) Read(p []byte) (n int, err error) {
  43         // TODO: check p for expected len
  44         f.Type = p[0:4]
  45         f.Creator = p[4:8]
  46         f.FileSize = p[8:12]
  47         f.RSVD = p[12:16]
  48         f.NameScript = p[16:18]
  49         f.NameSize = p[18:20]
  50         f.Name = p[20:]
  51
  52         return len(p), err
  53 }