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|
package hotline
import (
"bytes"
"encoding/binary"
"io"
"slices"
)
type FileNameWithInfo struct {
fileNameWithInfoHeader
name []byte // File name
}
// fileNameWithInfoHeader contains the fixed length fields of FileNameWithInfo
type fileNameWithInfoHeader struct {
Type [4]byte // File type code
Creator [4]byte // File creator code
FileSize [4]byte // File Size in bytes
RSVD [4]byte
NameScript [2]byte // ??
NameSize [2]byte // Length of name field
}
func (f *fileNameWithInfoHeader) nameLen() int {
return int(binary.BigEndian.Uint16(f.NameSize[:]))
}
// Read implements io.Reader for FileNameWithInfo
func (f *FileNameWithInfo) Read(b []byte) (int, error) {
return copy(b,
slices.Concat(
f.Type[:],
f.Creator[:],
f.FileSize[:],
f.RSVD[:],
f.NameScript[:],
f.NameSize[:],
f.name,
),
), io.EOF
}
func (f *FileNameWithInfo) Write(p []byte) (int, error) {
err := binary.Read(bytes.NewReader(p), binary.BigEndian, &f.fileNameWithInfoHeader)
if err != nil {
return 0, err
}
headerLen := binary.Size(f.fileNameWithInfoHeader)
f.name = p[headerLen : headerLen+f.nameLen()]
return len(p), nil
}
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