John Fletcher wrote:
I am doing some work adapting E4Graph to export RDF/XML.
To do this I want to be able to add some end of lines to the output to improve readability. I have done this for Linux using \n.
The problem is, of course, that for Windows and MacOS the need is different. Is there a system of defines setup within Metakit or E4Graph for testing for the operating system, or have I to go back to each OS for that?
There's some boilerplate checking in mk4.h, but at that level MK really tries to stay out of as many details as possible. For Windows, it uses:
#ifdef _WIN32
For classic Mac, you ought to be able to use:
#ifdef macintosh
For Mac OS X, the line ending is \n, i.e. as in every other Unix variant.
Look in src/fileio.cpp, that's the only spot where system dependencies in MK are supposed to matter. Note however that q4_UNIX, q4_WIN32, etc are only defined during the compilation of MK itself. As I said, the "mk4.h" public header goes out of its way to not be conditional on OS or STL/MFC.
Isn't it simpler to make the output code emit (fopen, puts, etc) the proper line ending, and stick to always using \n in C/C++ code and in MK storage? That way line endings differences needn't affect most of the code.
-jcw
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