Check the grubby details-- some fortran compilers can pass the length as a separate parameter, just after the string parameter, so you can receive them in C with void callfromfortran( char * Str, int Len )
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calling convention from fortran to c++ for strings
There is a fairly standard calling convention for fortran, and it's documented out on the web moderately well. Variables in general are passed by reference in FORTRAN. The problem is that no one states how strings are terminated.
I tried:
call myRoutine('xyz', 'abc')
in FORTRNA, and it calls:
void myroutine_(const char*a, const char* b) {
}
The problem is to identify the end of the strings, which is not obvious. They run into one another, not being null terminated.
As a temporary hack, I can write in my fortran:
call myRoutine('xyz\0', 'abc\0')
I don't believe \0 in FORTRAN is standard, and in any case, this is ugly.
Clearly, there is a way to get the size of the string. Identify it, and get the full 500 points, but no wild guesses please. You either know the answer, or you don't.
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by: jkrPosted on 2006-08-23 at 13:33:28ID: 17375997
I know this is "enemy territory", but MS has some info about that: http://msdn.microsoft.com/