Code to convert Unicode to ASCII

Question

I am looking for code for convert unicode to 7bit ASCII. Any suggestions?

Unicode is 16/32 bit - making it 7 bit is not decompression - it's compression. — Amarghosh
– Amarghosh, Commented Nov 26, 2009 at 8:45
If you were to call it compression then it's lossy compression, at best. — Jonas Elfström
– Jonas Elfström, Commented Nov 26, 2009 at 8:55
Do you need to "decompress" it, or do you want functions to print it and play with it? — mrduclaw
– mrduclaw, Commented Nov 26, 2009 at 9:08
Unicode is actually 20 bits; UTF-16 is a 16 bits encoding and UTF-32 a (trivial) 32 bits encoding. — MSalters
– MSalters, Commented Nov 26, 2009 at 9:40

dave4420 · Accepted Answer · 2009-11-26 11:42:12Z

1

If encoded with utf-8, it is the same for both ascii and unicode as ascii is a subset of unicode. See the example in RFC 2044

edited Nov 26, 2009 at 11:42

dave4420

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answered Nov 26, 2009 at 9:12

Yacoby

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Comments

Xander · Accepted Answer · 2009-11-26 11:20:14Z

0

A simple example below:

 try { System.IO.TextWriter writeFile = new StreamWriter("c:\\textwriter.txt",false,Encoding.UTF7); writeFile.WriteLine("example text here"); writeFile.Flush(); writeFile.Close(); writeFile = null; } catch (IOException ex) { MessageBox.Show(ex.ToString()); }

answered Nov 26, 2009 at 11:20

Xander

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5 Comments

Xander Over a year ago

This allows you to write to UTF-7, the string can be in any encoding i believe

Xander Over a year ago

NOTE: If there are some characters in the string that is not supppored by UTF-7, it will be lost

Kylotan Over a year ago

Looks rather more Java than C++ to me.

mrduclaw Over a year ago

@Kylotan, I was thinking it looked more like C#, but same point: OP wanted a C++ answer.

MSalters Over a year ago

@Xander: UTF-7 is a Unicode encoding, like the UTF-16 used by .Net. Now there are characters outside of Unicode (Klingon for instance) but you can't lose those by converting between different Unicode representations.

Nelson Benítez León · Accepted Answer · 2018-09-05 23:06:16Z

I'd recommend to adapt the code from glib C function g_str_to_ascii() to C++:

Link to g_str_to_ascii() code

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