/// <summary>
/// Returns up to maxEncodings codepages that are assumed to be apropriate
/// </summary>
/// <param name="input">array containing the raw data</param>
/// <param name="maxEncodings">maxiumum number of encodings to detect</param>
/// <returns>an array of Encoding with assumed encodings</returns>
public static Encoding[] DetectInputCodepages(byte[] input, int maxEncodings)
{
if (maxEncodings < 1)
throw new ArgumentOutOfRangeException("maxEncodings", "at least one encoding must be returned");
if (input == null)
throw new ArgumentNullException("input");
// empty strings can always be encoded as ASCII
if (input.Length == 0)
return new Encoding[] { Encoding.ASCII };
// expand the string to be at least 256 bytes
if (input.Length < 256)
{
byte[] newInput = new byte[256];
int steps = 256 / input.Length;
for (int i = 0; i < steps; i++)
Array.Copy(input, 0, newInput, input.Length * i, input.Length);
int rest = 256 % input.Length;
if (rest > 0)
Array.Copy(input, 0, newInput, steps * input.Length, rest);
input = newInput;
}
List<Encoding> result = new List<Encoding>();
// get the IMultiLanguage" interface
IMultiLanguage2 multilang2 = new CMultiLanguageClass();
if (multilang2 == null)
throw new COMException("Failed to get IMultilang2");
try
{
DetectEncodingInfo[] detectedEncdings = new DetectEncodingInfo[maxEncodings];
int scores = detectedEncdings.Length;
int srcLen = input.Length;
// setup options (none)
const MLDETECTCP options = MLDETECTCP.MLDETECTCP_NONE;
// finally... call to DetectInputCodepage
multilang2.DetectInputCodepage(options, 0,
ref input[0], ref srcLen, ref detectedEncdings[0], ref scores);
// get result
if (scores > 0)
{
for (int i = 0; i < scores; i++)
{
// add the result
result.Add(Encoding.GetEncoding((int)detectedEncdings[i].nCodePage));
}
}
}
finally
{
Marshal.FinalReleaseComObject(multilang2);
}
// nothing found
return result.ToArray();
}
public static Encoding[] GetEncodings(byte[] input, int maxEncodings)
{
if (input.IsNullOrEmpty())
{
return(new[]
{
Default
});
}
if (maxEncodings < 1)
{
maxEncodings = 1;
}
// expand the string to be at least 256 bytes
if (input.Length < 256)
{
byte[] newInput = new byte[256];
int steps = 256 / input.Length;
for (int i = 0; i < steps; i++)
{
Array.Copy(input, 0, newInput, input.Length * i, input.Length);
}
int rest = 256 % input.Length;
if (rest > 0)
{
Array.Copy(input, 0, newInput, steps * input.Length, rest);
}
input = newInput;
}
List <Encoding> result = new List <Encoding>();
// get the IMultiLanguage" interface
IMultiLanguage2 multiLang2 = new CMultiLanguageClass();
if (multiLang2 == null)
{
throw new COMException("Failed to get " + nameof(IMultiLanguage2));
}
try
{
DetectEncodingInfo[] detectedEncodings = new DetectEncodingInfo[maxEncodings];
int scores = detectedEncodings.Length;
int srcLen = input.Length;
// finally... call to DetectInputCodepage
multiLang2.DetectInputCodepage(MLDETECTCP.MLDETECTCP_NONE, 0, ref input[0], ref srcLen, ref detectedEncodings[0], ref scores);
// get result
if (scores > 0)
{
for (int i = 0; i < scores; i++)
{
result.Add(Encoding.GetEncoding((int)detectedEncodings[i].nCodePage));
}
}
}
finally
{
Marshal.FinalReleaseComObject(multiLang2);
}
return(result.ToArray());
}
/// <summary>
/// Rerurns up to maxEncodings codpages that are assumed to be apropriate
/// </summary>
/// <param name="input">array containing the raw data</param>
/// <param name="maxEncodings">maxiumum number of encodings to detect</param>
/// <returns>an array of Encoding with assumed encodings</returns>
public static Encoding[] DetectInputCodepages(byte[] input, int maxEncodings)
{
if (maxEncodings < 1)
{
throw new ArgumentOutOfRangeException("maxEncodings", "at least one encoding must be returned");
}
if (input == null)
{
throw new ArgumentNullException("input");
}
// empty strings can always be encoded as ASCII
if (input.Length == 0)
{
return new Encoding[] { Encoding.ASCII };
}
// expand the string to be at least 256 bytes
if (input.Length < 256)
{
byte[] newInput = new byte[256];
int steps = 256 / input.Length;
for (int i = 0; i < steps; i++)
{
Array.Copy(input, 0, newInput, input.Length * i, input.Length);
}
int rest = 256 % input.Length;
if (rest > 0)
{
Array.Copy(input, 0, newInput, steps * input.Length, rest);
}
input = newInput;
}
List<Encoding> result = new List<Encoding>();
// get the IMultiLanguage" interface
IMultiLanguage2 multilang2 = new CMultiLanguageClass();
if (multilang2 == null)
{
throw new COMException("Failed to get IMultilang2");
}
try
{
DetectEncodingInfo[] detectedEncdings = new DetectEncodingInfo[maxEncodings];
int scores = detectedEncdings.Length;
int srcLen = input.Length;
// setup options (none)
const Mldetectcp options = Mldetectcp.MldetectcpNone;
// finally... call to DetectInputCodepage
multilang2.DetectInputCodepage(options, 0,
ref input[0], ref srcLen, ref detectedEncdings[0], ref scores);
// get result
if (scores > 0)
{
for (int i = 0; i < scores; i++)
{
// add the result
result.Add(Encoding.GetEncoding((int)detectedEncdings[i].nCodePage));
}
}
}
finally
{
Marshal.FinalReleaseComObject(multilang2);
}
// nothing found
return result.ToArray();
}
public static Encoding DetectEncoding(byte[] data, int dataLength, DetectOption flags)
{
Encoding encoding2;
if (data == null)
{
throw new ArgumentNullException("data");
}
if (data.Length < dataLength)
{
throw new ArgumentException("data length is less than dataLength");
}
if (dataLength == 0)
{
return null;
}
if ((flags & DetectOption.TrySimpleDetectFirst) > DetectOption.Default)
{
Encoding encoding = SimpleDetectEncoding(data, dataLength);
if (encoding != null)
{
return encoding;
}
}
IMultiLanguage2 o = new CMultiLanguageClass() as IMultiLanguage2;
if (o == null)
{
return (((flags & DetectOption.TrySimpleDetectFirst) > DetectOption.Default) ? null : SimpleDetectEncoding(data, dataLength));
}
try
{
DetectEncodingInfo[] lpEncoding = new DetectEncodingInfo[1];
int length = lpEncoding.Length;
switch (o.DetectInputCodepage(((MLDETECTCP) flags) & MLDETECTCP.MLDETECTCP_MASK, 0, data, ref dataLength, lpEncoding, ref length))
{
case 0:
case 1:
if (length <= 0)
{
break;
}
return Encoding.GetEncoding((int) lpEncoding[0].nCodePage);
}
encoding2 = null;
}
finally
{
Marshal.FinalReleaseComObject(o);
}
return encoding2;
}