jellyfin-server/Emby.Common.Implementations/TextEncoding/TextEncoding.cs
2016-11-03 18:34:16 -04:00

49 lines
1.4 KiB
C#

using System.Text;
using MediaBrowser.Model.IO;
using MediaBrowser.Model.TextEncoding;
namespace Emby.Common.Implementations.TextEncoding
{
public class TextEncoding : IEncoding
{
private readonly IFileSystem _fileSystem;
public TextEncoding(IFileSystem fileSystem)
{
_fileSystem = fileSystem;
}
public byte[] GetASCIIBytes(string text)
{
return Encoding.ASCII.GetBytes(text);
}
public string GetASCIIString(byte[] bytes, int startIndex, int length)
{
return Encoding.ASCII.GetString(bytes, 0, bytes.Length);
}
public Encoding GetFileEncoding(string srcFile)
{
// *** Detect byte order mark if any - otherwise assume default
var buffer = new byte[5];
using (var file = _fileSystem.OpenRead(srcFile))
{
file.Read(buffer, 0, 5);
}
if (buffer[0] == 0xef && buffer[1] == 0xbb && buffer[2] == 0xbf)
return Encoding.UTF8;
if (buffer[0] == 0xfe && buffer[1] == 0xff)
return Encoding.Unicode;
if (buffer[0] == 0 && buffer[1] == 0 && buffer[2] == 0xfe && buffer[3] == 0xff)
return Encoding.UTF32;
if (buffer[0] == 0x2b && buffer[1] == 0x2f && buffer[2] == 0x76)
return Encoding.UTF7;
return null;
}
}
}