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72 lines
2.0 KiB
Python
72 lines
2.0 KiB
Python
from gen_function import *
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import string
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def gen_callback(args):
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# A template for the call_method function which we're going to generate
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call_method = '''%{ template <%(class A%n%:, %)>
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%} static %1 call_method(PyObject* self, const char* name%(, const A%n& a%n%))
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{ %2PyEval_CallMethod(self, const_cast<char*>(name), const_cast<char*>("(%(N%))")%(, to_python(a%n)%))%3; }
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'''
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non_void = ('R', 'return from_python(expect_non_null(', '), Type<R>())')
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void = ('void', 'expect_and_absorb_non_null(', ')')
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return (
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"""// (C) Copyright David Abrahams 2000. Permission to copy, use, modify, sell and
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// distribute this software is granted provided this copyright notice appears
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// in all copies. This software is provided "as is" without express or implied
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// warranty, and with no claim as to its suitability for any purpose.
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//
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// The author gratefully acknowleges the support of Dragon Systems, Inc., in
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// producing this work.
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//
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// This file was generated for %d-argument python callbacks by gen_callback.py
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#ifndef CALLBACK_DWA_052100_H_
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# define CALLBACK_DWA_052100_H_
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# include "pyconfig.h"
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# include "py.h"
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namespace py {
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// Just like the above, except we decrement p's reference count instead of returning it.
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void expect_and_absorb_non_null(PyObject* p);
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// Calling Python from C++
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template <class R>
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struct Callback
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{
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""" % args
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+ gen_functions(call_method, args, 'R', 'return from_python(expect_non_null(', '), Type<R>())')
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+
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"""};
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// This specialization wouldn't be needed, but MSVC6 doesn't correctly allow the following:
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// void g();
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// void f() { return g(); }
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template <>
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struct Callback<void>
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{
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"""
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+ gen_functions(call_method, args, 'void', 'expect_and_absorb_non_null(', ')')
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+
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"""};
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} // namespace py
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#endif // CALLBACK_DWA_052100_H_
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""")
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if __name__ == '__main__':
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import sys
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if len(sys.argv) == 1:
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args = 5
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else:
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args = int(sys.argv[1])
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print gen_callback(args)
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