private static LineTermination DetectLineTermination(Stream stream, LineTermination defaultLineTermination)
{
int c;
while ((c = stream.ReadByte()) != -1)
{
if (c == '\r')
{
c = stream.ReadByte();
if (c != '\n')
{
return(LineTermination.Mac);
}
return(LineTermination.Pc);
}
else if (c == '\n')
{
return(LineTermination.Unix);
}
}
// The default when we don't have any line ending.
return(defaultLineTermination);
}
public static void NormalizeLineTermination(StringBuilder target, string value, LineTermination mode)
{
if (target == null)
throw new ArgumentNullException("target");
if (value == null)
return;
string lineTermination = GetNewline(mode);
for (int i = 0; i < value.Length; i++)
{
char c = value[i];
switch (c)
{
case '\r':
if (i < value.Length - 1 && value[i + 1] == '\n')
i++;
target.Append(lineTermination);
break;
case '\n':
target.Append(lineTermination);
break;
default:
target.Append(c);
break;
}
}
}
public TextFileType(Encoding encoding, LineTermination lineTermination)
: base(FileTypeType.Text)
{
if (encoding == null)
throw new ArgumentNullException("encoding");
Encoding = encoding;
LineTermination = lineTermination;
}
public TextFileType(Encoding encoding, LineTermination lineTermination)
: base(FileTypeType.Text)
{
if (encoding == null)
{
throw new ArgumentNullException("encoding");
}
Encoding = encoding;
LineTermination = lineTermination;
}
public static string NormalizeLineTermination(string value, LineTermination mode)
{
if (value == null)
return null;
var sb = new StringBuilder();
NormalizeLineTermination(sb, value, mode);
return sb.ToString();
}
public static string NormalizeLineTermination(string value, LineTermination mode)
{
if (value == null)
{
return(null);
}
var sb = new StringBuilder();
NormalizeLineTermination(sb, value, mode);
return(sb.ToString());
}
public static string GetLineTermination(LineTermination mode)
{
switch (mode)
{
case LineTermination.Pc:
return "\r\n";
case LineTermination.Unix:
return "\n";
case LineTermination.Mac:
return "\r";
default:
throw new ArgumentOutOfRangeException("mode");
}
}
public static string GetNewline(LineTermination mode)
{
switch (mode)
{
case LineTermination.Pc:
return("\r\n");
case LineTermination.Unix:
return("\n");
case LineTermination.Mac:
return("\r");
default:
throw new ArgumentOutOfRangeException("mode");
}
}
public static TextFileType FromStream(Stream stream, string extension, Encoding defaultEncoding, LineTermination defaultLineTermination)
{
if (stream == null)
throw new ArgumentNullException("stream");
if (extension == null)
throw new ArgumentNullException("extension");
if (defaultEncoding == null)
defaultEncoding = Encoding.ASCII;
if (stream.Length == 0)
return new TextFileType(defaultEncoding, defaultLineTermination);
stream.Position = 0;
var encoding = DetectEncoding(stream);
if (encoding != null)
{
int bomSize = (int)stream.Position;
byte[] bom = null;
if (bomSize > 0)
{
stream.Position = 0;
bom = new byte[bomSize];
stream.Read(bom, 0, bom.Length);
}
Debug.Assert(ArrayUtil.Equals(
bom ?? new byte[0],
encoding.GetPreamble()
));
return new TextFileType(encoding, DetectLineTermination(stream, defaultLineTermination));
}
encoding = GuessEncoding(stream, defaultEncoding);
if (encoding != null)
return new TextFileType(encoding, DetectLineTermination(stream, defaultLineTermination));
return null;
}
public static TextFileType FromStream(Stream stream, string extension, Encoding defaultEncoding, LineTermination defaultLineTermination)
{
if (stream == null)
{
throw new ArgumentNullException("stream");
}
if (extension == null)
{
throw new ArgumentNullException("extension");
}
if (defaultEncoding == null)
{
defaultEncoding = Encoding.ASCII;
}
if (stream.Length == 0)
{
return(new TextFileType(defaultEncoding, defaultLineTermination));
}
stream.Position = 0;
var encoding = DetectEncoding(stream);
if (encoding != null)
{
int bomSize = (int)stream.Position;
byte[] bom = null;
if (bomSize > 0)
{
stream.Position = 0;
bom = new byte[bomSize];
stream.Read(bom, 0, bom.Length);
}
Debug.Assert(ArrayUtil.Equals(
bom ?? new byte[0],
encoding.GetPreamble()
));
return(new TextFileType(encoding, DetectLineTermination(stream, defaultLineTermination)));
}
encoding = GuessEncoding(stream, defaultEncoding);
if (encoding != null)
{
return(new TextFileType(encoding, DetectLineTermination(stream, defaultLineTermination)));
}
return(null);
}
private static LineTermination DetectLineTermination(Stream stream, LineTermination defaultLineTermination)
{
int c;
while ((c = stream.ReadByte()) != -1)
{
if (c == '\r')
{
c = stream.ReadByte();
if (c != '\n')
return LineTermination.Mac;
return LineTermination.Pc;
}
else if (c == '\n')
{
return LineTermination.Unix;
}
}
// The default when we don't have any line ending.
return defaultLineTermination;
}
public static void NormalizeLineTermination(StringBuilder target, string value, LineTermination mode)
{
if (target == null)
{
throw new ArgumentNullException("target");
}
if (value == null)
{
return;
}
string lineTermination = GetNewline(mode);
for (int i = 0; i < value.Length; i++)
{
char c = value[i];
switch (c)
{
case '\r':
if (i < value.Length - 1 && value[i + 1] == '\n')
{
i++;
}
target.Append(lineTermination);
break;
case '\n':
target.Append(lineTermination);
break;
default:
target.Append(c);
break;
}
}
}
