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special characters

#1105  Permalink Top

special characters

May-03-11 22:41:57

Hi,
I need to pass a string to a external c-function under windows. The string contains special characters like \n for a new line. If I Write the characetr to a text file, the two characters \n appear in the text file (and not the expected new line).

My questions:
How does OpenModelica treat special characters like \n?
Which string would give me the new line?

Frank

#1106  Permalink Top

Re: special characters

May-03-11 22:49:18

It depends what version of OMC you are using. Older versions of OMC would output \\n in some cases and \n in others (a bit arbitrarily).

As far as I know, putting a newline character in the Modelica string, i.e.

Code:

String str = "ab

c";

works for all OMC versions. If you found a certain way (read:bug) in which OMC 1.7 does not translate \n, post it and it will be fixed.

#1107  Permalink Top

Re: special characters

May-03-11 22:49:53

Oh yea... The code I tested was:

Code:

model M

  function fn

    input String str;

    output Integer i;

  external "C" i=puts(str);

  end fn;

  Real x;

equation

  x = fn(String(time) + " ab\nc");

end M;

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