public virtual extern void DetectOutboundCodePage([In] MLCPF dwFlags,
[In][MarshalAs(UnmanagedType.LPWStr)] string lpWideCharStr,
[In] uint cchWideChar,
[In] IntPtr puiPreferredCodePages,
[In] uint nPreferredCodePages,
[In] IntPtr puiDetectedCodePages,
[In][Out] ref uint pnDetectedCodePages,
[In] ref ushort lpSpecialChar);
public virtual extern HRESULT DetectOutboundCodePageInIStream(
[In] MLCPF dwFlags,
[In, MarshalAs(UnmanagedType.Interface)] IStream pStrIn,
[In] IntPtr puiPreferredCodePages,
[In] uint nPreferredCodePages,
[In] IntPtr puiDetectedCodePages,
[In, Out] ref uint pnDetectedCodePages,
[In] ref ushort lpSpecialChar
);
public static Encoding[] DetectOutgoingEncodings(string input, int[] preferredEncodings, bool preserveOrder)
{
if (input == null)
throw new ArgumentNullException("input");
// empty strings can always be encoded as ASCII
if (input.Length == 0)
return new Encoding[] { Encoding.ASCII };
List<Encoding> result = new List<Encoding>();
// get the IMultiLanguage3 interface
IMultiLanguage3 multilang3 = new CMultiLanguageClass();
if (multilang3 == null)
throw new COMException("Failed to get IMultilang3");
try
{
int[] resultCodePages = new int[preferredEncodings.Length];
uint detectedCodepages = (uint)resultCodePages.Length;
ushort specialChar = (ushort)'?';
// get unmanaged arrays
IntPtr pPrefEncs = Marshal.AllocCoTaskMem(sizeof(uint) * preferredEncodings.Length);
IntPtr pDetectedEncs = Marshal.AllocCoTaskMem(sizeof(uint) * resultCodePages.Length);
try
{
Marshal.Copy(preferredEncodings, 0, pPrefEncs, preferredEncodings.Length);
Marshal.Copy(resultCodePages, 0, pDetectedEncs, resultCodePages.Length);
MLCPF options = MLCPF.MLDETECTF_VALID_NLS | MLCPF.MLDETECTF_PREFERRED_ONLY;
if (preserveOrder)
options |= MLCPF.MLDETECTF_PRESERVE_ORDER;
options |= MLCPF.MLDETECTF_PREFERRED_ONLY;
// finally... call to DetectOutboundCodePage
multilang3.DetectOutboundCodePage(options,
input, (uint)input.Length,
pPrefEncs, (uint)preferredEncodings.Length,
pDetectedEncs, ref detectedCodepages,
ref specialChar);
// get result
if (detectedCodepages > 0)
{
int[] theResult = new int[detectedCodepages];
Marshal.Copy(pDetectedEncs, theResult, 0, theResult.Length);
// get the encodings for the codepages
for (int i = 0; i < detectedCodepages; i++)
result.Add(Encoding.GetEncoding(theResult[i]));
}
}
finally
{
if (pPrefEncs != IntPtr.Zero)
Marshal.FreeCoTaskMem(pPrefEncs);
Marshal.FreeCoTaskMem(pDetectedEncs);
}
}
finally
{
Marshal.FinalReleaseComObject(multilang3);
}
// nothing found
return result.ToArray();
}
private static Encoding DetectOutgoingEncoding(string input, int[] preferredEncodings, bool preserveOrder)
{
if (input == null)
throw new ArgumentNullException("input");
// empty strings can always be encoded as ASCII
if (input.Length == 0)
return Encoding.ASCII;
Encoding result = Encoding.ASCII;
// get the IMultiLanguage3 interface
IMultiLanguage3 multilang3 = new CMultiLanguageClass();
if (multilang3 == null)
throw new COMException("Failed to get IMultilang3");
try
{
int[] resultCodePages = new int[preferredEncodings != null ? preferredEncodings.Length : Encoding.GetEncodings().Length];
uint detectedCodepages = (uint)resultCodePages.Length;
ushort specialChar = (ushort)'?';
// get unmanaged arrays
IntPtr pPrefEncs = preferredEncodings == null ? IntPtr.Zero : Marshal.AllocCoTaskMem(sizeof(uint) * preferredEncodings.Length);
IntPtr pDetectedEncs = Marshal.AllocCoTaskMem(sizeof(uint) * resultCodePages.Length);
try
{
if (preferredEncodings != null)
Marshal.Copy(preferredEncodings, 0, pPrefEncs, preferredEncodings.Length);
Marshal.Copy(resultCodePages, 0, pDetectedEncs, resultCodePages.Length);
MLCPF options = MLCPF.MLDETECTF_VALID_NLS;
if (preserveOrder)
options |= MLCPF.MLDETECTF_PRESERVE_ORDER;
if (preferredEncodings != null)
options |= MLCPF.MLDETECTF_PREFERRED_ONLY;
multilang3.DetectOutboundCodePage(options,
input, (uint)input.Length,
pPrefEncs, (uint)(preferredEncodings == null ? 0 : preferredEncodings.Length),
pDetectedEncs, ref detectedCodepages,
ref specialChar);
// get result
if (detectedCodepages > 0)
{
int[] theResult = new int[detectedCodepages];
Marshal.Copy(pDetectedEncs, theResult, 0, theResult.Length);
result = Encoding.GetEncoding(theResult[0]);
}
}
finally
{
if (pPrefEncs != IntPtr.Zero)
Marshal.FreeCoTaskMem(pPrefEncs);
Marshal.FreeCoTaskMem(pDetectedEncs);
}
}
finally
{
Marshal.FinalReleaseComObject(multilang3);
}
return result;
}
private static Encoding[] FindEncodings(string input, int[] preferredEncodings, bool preserveOrder)
{
// empty strings can always be encoded as ASCII
if (string.IsNullOrEmpty(input))
{
return(new[]
{
Default
});
}
bool bPrefEnc = !preferredEncodings.IsNullOrEmpty();
List <Encoding> result = new List <Encoding>();
// get the IMultiLanguage3 interface
IMultiLanguage3 multiLang3 = new CMultiLanguageClass();
if (multiLang3 == null)
{
throw new COMException("Failed to get " + nameof(IMultiLanguage3));
}
try
{
int count = bPrefEnc ? preferredEncodings.Length : SystemEncodingCount;
int[] resultCodePages = new int[count];
uint detectedCodePages = (uint)resultCodePages.Length;
ushort specialChar = '?';
// get unmanaged arrays
IntPtr preferred = bPrefEnc ? Marshal.AllocCoTaskMem(sizeof(uint) * preferredEncodings.Length) : IntPtr.Zero;
IntPtr detected = Marshal.AllocCoTaskMem(sizeof(uint) * resultCodePages.Length);
try
{
if (bPrefEnc)
{
Marshal.Copy(preferredEncodings, 0, preferred, preferredEncodings.Length);
}
Marshal.Copy(resultCodePages, 0, detected, resultCodePages.Length);
MLCPF options = MLCPF.MLDETECTF_VALID_NLS;
if (preserveOrder)
{
options |= MLCPF.MLDETECTF_PRESERVE_ORDER;
}
if (bPrefEnc)
{
options |= MLCPF.MLDETECTF_PREFERRED_ONLY;
}
// finally... call to DetectOutboundCodePage
multiLang3.DetectOutboundCodePage(options,
input,
(uint)input.Length,
preferred,
(uint)(bPrefEnc ? preferredEncodings.Length : 0),
detected,
ref detectedCodePages,
ref specialChar);
// get result
if (detectedCodePages > 0)
{
int[] theResult = new int[detectedCodePages];
Marshal.Copy(detected, theResult, 0, theResult.Length);
// get the encodings for the code pages
for (int i = 0; i < detectedCodePages; i++)
{
result.Add(Encoding.GetEncoding(theResult[i]));
}
}
}
finally
{
if (!preferred.IsZero())
{
Marshal.FreeCoTaskMem(preferred);
}
Marshal.FreeCoTaskMem(detected);
}
}
finally
{
Marshal.FinalReleaseComObject(multiLang3);
}
return(result.ToArray());
}
