No UTF-32 big-endian in C#?

Question

In C#, Encoding.UTF32 is UTF-32 little-endian, Encoding.BigEndianUnicode is UTF-16 big-endian, Encoding.Unicode is UTF-16 little-endian. But I can't find any for UTF-32 big-endian.

I'm developing a simple textviewer and don't think there are many documents encoded in UTF-32 big-endian but I want to prepare for that too, just in case.

Doesn't C# support UTF32 big-endian?

BTW Java supports it.

https://msdn.microsoft.com/en-us/library/system.text.utf32encoding%28v=vs.110%29.aspx seems to indicate that the byte order is a parameter to the constructor -- is that something different than you had in mind? — Peter - Reinstate Monica, Oct 06 '15 at 15:29
Encoding.GetEncoding("utf-32be") is a simple way to get one. — Hans Passant, Oct 06 '15 at 15:36

score 14 · Accepted Answer · answered Oct 06 '15 at 15:29

14

It does support big endian on UTF-32. Just create the encoding yourself using the overloaded constructor:

Encoding e = new UTF32Encoding(true /*bigEndian*/, true /*byteOrderMark*/);

The encodings predefined as static on Encoding aren't an exhaustive list. You can create much and much more other encodings.

answered Oct 06 '15 at 15:29

Patrick Hofman

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I found a few resources that said it could be done but not explicitly how to do it - nice work! – Luke Baughan Oct 06 '15 at 15:31
Wow! you saved me! Thanks a lot!! – Jenix Oct 06 '15 at 15:35

score 0 · Answer 2 · answered Sep 20 '18 at 20:46

//https://learn.microsoft.com/en-us/dotnet/api/system.text.encoding?view=netframework-4.7.2
//12000 utf-32  Unicode (UTF-32)    ✓   ✓
//12001 utf-32BE    Unicode (UTF-32 Big endian)
const string strUniRepChr = "�"; //Unicode Character 'REPLACEMENT CHARACTER' (U+FFFD)
Encoding cpUTF32 = Encoding.GetEncoding(12000,
                   new EncoderReplacementFallback(strUniRepChr),
                   new DecoderReplacementFallback(strUniRepChr) );

No UTF-32 big-endian in C#?

2 Answers2

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