public static bool IsBinary(byte[] buf)
{
BufStatistic bufStatistic = GetBufStatistic(buf);
if (bufStatistic.cntNul > 0)
{
return(true);
}
if ((bufStatistic.cntPrintable / 128) < bufStatistic.cntNonPrintable)
{
return(true);
}
return(false);
}
public static byte[] ConvertCrLfToWorktree([CanBeNull] byte[] buf)
{
if (buf == null)
{
return(buf);
}
var bufStatistic = new BufStatistic(buf);
if (bufStatistic.cntLf == 0)
{
return(buf);
}
if (bufStatistic.cntLf == bufStatistic.cntCrlf)
{
return(buf);
}
if (bufStatistic.cntCr != bufStatistic.cntCrlf)
{
return(buf);
}
if (IsBinary())
{
return(buf);
}
var bytes = new List <byte>((int)(buf.Length * 1.01));
if (buf.Length >= 1)
{
if (buf[0] == lf)
{
bytes.Add(cr);
bytes.Add(lf);
}
else
{
bytes.Add(buf[0]);
}
}
for (var index = 1; index < buf.Length; index++)
{
if (buf[index] == lf)
{
if (buf[index - 1] == cr)
{
bytes.Add(lf);
}
else
{
bytes.Add(cr);
bytes.Add(lf);
}
}
else
{
bytes.Add(buf[index]);
}
}
return(bytes.ToArray());
bool IsBinary()
{
if (bufStatistic.cntNul > 0)
{
return(true);
}
if ((bufStatistic.cntPrintable / 128) < bufStatistic.cntNonPrintable)
{
return(true);
}
return(false);
}
}
private static BufStatistic GetBufStatistic(byte[] buf)
{
BufStatistic bufStatistic = new BufStatistic();
bufStatistic.ResetBufStatistic();
if (buf == null)
{
return(bufStatistic);
}
for (long i = 0; i < buf.Length; i++)
{
if (buf[i] == 0x0D)
{
bufStatistic.cntCr++;
if (i + 1 < buf.Length)
{
if (buf[i + 1] == 0x0A)
{
bufStatistic.cntCrlf++;
}
}
continue;
}
if (buf[i] == 0x0A)
{
bufStatistic.cntLf++;
continue;
}
if (buf[i] == 0x7F)
{
bufStatistic.cntNonPrintable++;
}
else if (buf[i] < 0x20)
{
switch (buf[i])
{
case 0x08:
case 0x09:
case 0x1B:
case 0x0C:
bufStatistic.cntPrintable++;
break;
case 0:
bufStatistic.cntNul++;
bufStatistic.cntNonPrintable++;
break;
default:
bufStatistic.cntNonPrintable++;
break;
}
}
else
{
bufStatistic.cntPrintable++;
}
}
if (buf.Length >= 1)
{
if (buf[buf.Length - 1] == 0x1A)
{
bufStatistic.cntNonPrintable--;
}
}
return(bufStatistic);
}
public static byte[] ConvertCrLfToWorktree(byte[] buf)
{
if (buf == null)
{
return(buf);
}
BufStatistic bufStatistic = GetBufStatistic(buf);
if (bufStatistic.cntLf == 0)
{
return(buf);
}
if (bufStatistic.cntLf == bufStatistic.cntCrlf)
{
return(buf);
}
if (bufStatistic.cntCr != bufStatistic.cntCrlf)
{
return(buf);
}
if (IsBinary(buf))
{
return(buf);
}
List <byte> byteList = new List <byte>();
if (buf.LongLength >= 1)
{
if (buf[0] == 0x0A)
{
byteList.Add(0x0D);
byteList.Add(0x0A);
}
else
{
byteList.Add(buf[0]);
}
}
for (long index = 1; index < buf.LongLength; index++)
{
if (buf[index] == 0x0A)
{
if (buf[index - 1] == 0x0D)
{
byteList.Add(0x0A);
}
else
{
byteList.Add(0x0D);
byteList.Add(0x0A);
}
}
else
{
byteList.Add(buf[index]);
}
}
return(byteList.ToArray());
}
private static BufStatistic GetBufStatistic(byte[] buf)
{
BufStatistic bufStatistic = new BufStatistic();
bufStatistic.ResetBufStatistic();
if (buf == null)
return bufStatistic;
for (long i = 0; i < buf.Length; i++)
{
if (buf[i] == 0x0D)
{
bufStatistic.cntCr++;
if (i + 1 < buf.Length)
{
if (buf[i + 1] == 0x0A)
{
bufStatistic.cntCrlf++;
}
}
continue;
}
if (buf[i] == 0x0A)
{
bufStatistic.cntLf++;
continue;
}
if (buf[i] == 0x7F)
{
bufStatistic.cntNonPrintable++;
}
else if (buf[i] < 0x20)
{
switch (buf[i])
{
case 0x08:
case 0x09:
case 0x1B:
case 0x0C:
bufStatistic.cntPrintable++;
break;
case 0:
bufStatistic.cntNul++;
bufStatistic.cntNonPrintable++;
break;
default:
bufStatistic.cntNonPrintable++;
break;
}
}
else
{
bufStatistic.cntPrintable++;
}
}
if (buf.Length >= 1)
{
if (buf[buf.Length - 1] == 0x1A)
{
bufStatistic.cntNonPrintable--;
}
}
return bufStatistic;
}
