SubtitleEdit/libse/TarHeader.cs

48 lines
1.4 KiB
C#
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using System;
using System.IO;
using System.Text;
namespace Nikse.SubtitleEdit.Core
{
public class TarHeader
{
public const int HeaderSize = 512;
public string FileName { get; set; }
public bool IsFolder { get; set; }
public long FileSizeInBytes { get; set; }
public long FilePosition { get; set; }
private readonly Stream _stream;
public TarHeader(Stream stream)
{
_stream = stream;
var buffer = new byte[HeaderSize];
stream.Read(buffer, 0, HeaderSize);
FilePosition = stream.Position;
FileName = Encoding.ASCII.GetString(buffer, 0, 100)
.Replace("\0", string.Empty)
.Replace('/', Path.DirectorySeparatorChar)
.Trim();
IsFolder = buffer[156] == 53;
var sizeInBytes = Encoding.ASCII.GetString(buffer, 124, 11);
if (!string.IsNullOrEmpty(FileName) && Utilities.IsInteger(sizeInBytes))
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{
FileSizeInBytes = Convert.ToInt64(sizeInBytes.Trim(), 8);
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}
}
public void WriteData(string fileName)
{
var buffer = new byte[FileSizeInBytes];
_stream.Position = FilePosition;
_stream.Read(buffer, 0, buffer.Length);
File.WriteAllBytes(fileName, buffer);
}
}
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}