public FileEncoding(Encoding type, bool bom, NewlineMode newline, bool endOfFileNewline)
{
this.Type = type;
this.Bom = bom;
this.Newline = newline;
this.EndOfFileNewline = endOfFileNewline;
}
private static string GetNewline(NewlineMode newlineMode)
{
switch (newlineMode)
{
case NewlineMode.Unix: return("\n");
case NewlineMode.Windows: return("\r\n");
}
throw new Exception($"Unrecognized newline-mode: '{newlineMode}'");
}
public static FileEncoding GetEncoding(string path)
{
Encoding encoding = Encoding.Default;
bool bom = false;
NewlineMode newlineMode = NewlineMode.Windows;
var bytes = new byte[10000];
int bytesRead = 0;
using (var fileStream = new FileStream(path, FileMode.Open, FileAccess.Read))
{
bytesRead = fileStream.Read(bytes, 0, bytes.Length);
}
// Check if the file has a BOM
if (bytes[0] == 0x2B && bytes[1] == 0x2F && bytes[2] == 0x76)
{
encoding = Encoding.UTF7;
bom = true;
}
else if (bytes[0] == 0xEF && bytes[1] == 0xBB && bytes[2] == 0xBF)
{
encoding = Encoding.UTF8;
bom = true;
}
else if (bytes[0] == 0xFF && bytes[1] == 0xFE)
{
encoding = Encoding.Unicode;
bom = true;
}
else if (bytes[0] == 0xFE && bytes[1] == 0xFF)
{
encoding = Encoding.BigEndianUnicode;
bom = true;
}
else if (bytes[0] == 0x00 && bytes[1] == 0x00 && bytes[2] == 0xFE && bytes[3] == 0xFF)
{
encoding = new UTF32Encoding(true, true);
bom = true;
}
// No bom found, check if data passes as a bom-less UTF-8 file
else if (ValidUtf8(bytes, bytesRead))
{
encoding = Encoding.UTF8;
}
// Check if the file has null bytes, if so we assume it's a bom-less UTF-16
else
{
for (int i = 0; i < bytesRead; i++)
{
if (bytes[i] == 0)
{
encoding = Encoding.Unicode;
break;
}
}
}
// Check what newline characters are used
for (int i = 0; i < bytesRead; i++)
{
if (bytes[i] == '\n')
{
newlineMode = NewlineMode.Unix;
break;
}
else if (bytes[i] == '\r')
{
int newLineBytes = encoding == Encoding.Unicode || encoding == Encoding.BigEndianUnicode ? 2 : 1;
if (i < bytesRead - newLineBytes && bytes[i + newLineBytes] == '\n')
{
newlineMode = NewlineMode.Windows;
break;
}
newlineMode = NewlineMode.Mac;
break;
}
}
return(new FileEncoding(encoding, bom, newlineMode));
}
/// <summary>
/// Initializes a new instance of the <see cref="CodeBuilder"/> class.
/// </summary>
/// <param name="indentMode">Mode to use for indenting</param>
/// <param name="spaceIndentSize">When indenting with spaces this controls how many</param>
/// <param name="newlineMode">Mode to use for ending lines</param>
public CodeBuilder(IndentMode indentMode, int spaceIndentSize, NewlineMode newlineMode)
{
this.indent = GetIndent(indentMode, spaceIndentSize);
this.newline = GetNewline(newlineMode);
}
