RE: [Help-glpk] Russian characters not allowed in GMPL?

[Meketon, Marc]

Andrew and Xypron: Thank you.  It's great that you respond so quickly to all 
types of questions.  It significantly increases the value of GLPK to know that 
there is such a dedicated user community.  Kudos also go for all the others 
that regularly respond to help requests (Noli, Nigel, Michael and so many 
others).

I'll probably go the unicode to win-1251 route, since the data file is 
generated via a C# program so using Notepad or the utf8proc is a bit more work 
than I want to do for now.  I believe that if I detect a Russian character, 
then subtracting 848 from it will get me into the win-1251 realm.  I try it out 
in the next day or two.

I was amused that "Russian" software did not handle Russian.

I am using GMPL to create the initial model - it's great for quick modeling and 
analysis.  I expect to finalize the model within the next week or two.  GMPL 
takes a couple of minutes to generate the matrix, and then GLPK takes less than 
a second to solve it.  For performance, I will then bypass GMPL and use direct 
calls to the GLPK library using the C# interface that Nigel and others helped 
me with a couple of days ago.  At that point I would not need to store any 
Russian terms.  

-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Andrew Makhorin
Sent: Sunday, June 13, 2010 8:00 PM
To: Meketon, Marc
Cc: address@hidden
Subject: Re: [Help-glpk] Russian characters not allowed in GMPL?

> I #8217;m have a GMPL data set, and some of the symbolic
> parameters have some Russian characters (example:š 70000_70460_1×Ó_20).
> šGMPL issues an error statement like  #8220;character Ð not allowed #8221;.

> Any easy fix?

Glpk does not support unicode as was noticed by Xypron. However, you can
use some cyrillic encoding like koi-8 or windows-1251. Note also that such
string literals should be enclosed within quotes, e.g.

set S := "cyrillic text", "another abracadabra", ... ;

Another way is to use multibyte characters; but in this case you need to
have a specialized text editor.


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