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Embedding XASM-programs in C-applications

If the XASM-part of a system should provide services for a C-based application, the main asm and all sub-asms of it can be called from the C-code. In this case, the XASM-compiler must be invoked with a special option that prevents the generation of the ``main''-function.

Before any of the asms can be invoked, the XASM-part must be initialized. For this purpose, the generated C-code defines the function ``asm_main'' as follows:

\mbox{\tt int asm\_main(int argc, char **argv);}

The arguments to this function are given as strings which are parsed and transformed to corresponding ``ASMOBJs''. The actual invocation of the main asm can be made using the C-function ``run_mainasm'':

\mbox{\tt ASMOBJ run\_mainasm();}

This kind of embedding is actually used in the implementation of the XASM-compiler itself: the static semantics check is carried out by an algorithm specified in XASM.

A number of external C-functions are already integrated into the runtime system. For example, external functions to communicate using UNIX-Sockets, string manipulation functions, file access functions etc. .

Philipp Kutter 2002-03-18