// file at path must be utf8 encoded
public static string ReadLastLineFromUTF8EncodedFile(string path)
{
using (System.IO.Stream fs = System.IO.File.OpenRead(path))
{
int b;
fs.Position = fs.Length;
while (fs.Position > 0)
{
fs.Position--;
b = fs.ReadByte();
if (b < 0)
{
// the only way this should happen is if someone truncates the file out from underneath us while we are reading backwards
throw new System.IO.IOException("Error reading from file at " + path);
}
if (b == '\n')
{
break;
}
fs.Position--;
}
byte[] bytes = new byte[fs.Length - fs.Position];
fs.ReadExactly(bytes);
return(System.Text.Encoding.UTF8.GetString(bytes));
}
}
// file at path must be utf8 encoded
public static string ReadLastLineFromUTF8EncodedFile(string path)
{
using (System.IO.Stream fs = System.IO.File.OpenRead(path))
{
int b;
fs.Position = fs.Length;
while (fs.Position > 0)
{
fs.Position--;
b = fs.ReadByte();
if (b < 0)
{
throw new System.IO.IOException("Error reading from file at " + path);
}
if (b == '\n')
{
break;
}
fs.Position--;
}
byte[] bytes = new byte[fs.Length - fs.Position];
fs.ReadExactly(bytes);
return(System.Text.Encoding.UTF8.GetString(bytes));
}
}