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define_cffi_proc

Definition: include cffi.e
integer id = define_cffi_proc(object lib, string cdef, integer machine=machine_bits())
(note: this is a text-based wrapper of define_c_proc)
Description: parse a string containing a C void function definition and obtain a routine id.
pwa/p2js: Not supported.
Comments: Converts a textual C void function definition, such as one copied directly from MSDN, to the parameters expected by define_c_proc(), and returns the routine_id obtained by calling that function. In other words define_cffi_proc("... HWND ...") is equivalent to, and in fact maps to define_c_proc(...{.. C_PTR ..}...), with most of the previously manual conversion automated for you.
a proc is expected to begin with a "void" return type.
lib can be a string or the previous result of open_dll.
The machine parameter can be set to 32 or 64 for testing purposes.

The void function definition may contain comments, however they must be C-style, ie/eg // comment or /* comment */, not -- comment.
Example: 
include cffi.e
constant tSleep="""
VOID WINAPI Sleep(
  _In_  DWORD dwMilliseconds
);
"""
constant xSleep = define_cffi_proc("kernel32.dll",tSleep)
c_proc(xSleep,{500})

set_unicode() is needed before any auto "A/W" handling.
See Also: define_c_proc, c_proc, set_unicode, machine_bits
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