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/*
* nextpnr -- Next Generation Place and Route
*
* Copyright (C) 2018 Clifford Wolf <clifford@clifford.at>
* Copyright (C) 2018 David Shah <dave@ds0.me>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
*/
#ifndef COMMON_PYBINDINGS_H
#define COMMON_PYBINDINGS_H
#include <utility>
#include <stdexcept>
#include <boost/python.hpp>
#include <boost/python/suite/indexing/vector_indexing_suite.hpp>
#include <boost/python/suite/indexing/map_indexing_suite.hpp>
#include <boost/python/suite/indexing/map_indexing_suite.hpp>
using namespace boost::python;
/*
A wrapper for a Pythonised nextpnr Iterator. The actual class wrapped is a
pair<Iterator, Iterator> containing (current, end)
*/
template<typename T>
struct iterator_wrapper {
typedef decltype(*(std::declval<T>())) value_t;
static value_t next(std::pair<T, T> &iter) {
if (iter.first != iter.second) {
value_t val = *iter.first;
++iter.first;
return val;
} else {
PyErr_SetString(PyExc_StopIteration, "End of range reached");
boost::python::throw_error_already_set();
// Should be unreachable, but prevent control may reach end of non-void
throw std::runtime_error("unreachable");
}
}
static void wrap(const char *python_name) {
class_<std::pair<T, T>>(python_name, no_init)
.def("__next__", next);
}
};
/*
A wrapper for a nextpnr Range. Ranges should have two functions, begin()
and end() which return iterator-like objects supporting ++, * and !=
Full STL iterator semantics are not required, unlike the standard Boost wrappers
*/
template<typename T>
struct range_wrapper {
typedef decltype(std::declval<T>().begin()) iterator_t;
static std::pair<iterator_t, iterator_t> iter(T &range) {
return std::make_pair(range.begin(), range.end());
}
static void wrap(const char *range_name, const char *iter_name) {
class_<T>(range_name, no_init)
.def("__iter__", iter);
iterator_wrapper<iterator_t>().wrap(iter_name);
}
};
/*
A wrapper to enable custom type/ID to/from string conversions
*/
template <typename T> struct string_wrapper {
template<typename F>
struct from_pystring_converter {
from_pystring_converter() {
converter::registry::push_back(
&convertible,
&construct,
boost::python::type_id<T>());
};
static void* convertible(PyObject* object) {
return PyUnicode_Check(object) ? object : 0;
}
static void construct(
PyObject* object,
converter::rvalue_from_python_stage1_data* data) {
const wchar_t* value = PyUnicode_AsUnicode(object);
const std::wstring value_ws(value);
if (value == 0) throw_error_already_set();
void* storage = (
(boost::python::converter::rvalue_from_python_storage<T>*)
data)->storage.bytes;
new (storage) T(fn(std::string(value_ws.begin(), value_ws.end())));
data->convertible = storage;
}
static F fn;
};
template<typename F> struct to_str_wrapper {
static F fn;
std::string str(T& x) {
return fn(x);
}
};
template<typename F1, typename F2> static void wrap(const char *type_name, F1 to_str_fn, F2 from_str_fn) {
from_pystring_converter<F2>::fn = from_str_fn;
from_pystring_converter<F2>();
to_str_wrapper<F1>::fn = to_str_fn;
class_<T>(type_name, no_init).def("__str__", to_str_wrapper<F1>::str);
};
};
#define WRAP_RANGE(t) range_wrapper<t##Range>().wrap(#t "Range", #t "Iterator")
void init_python(const char *executable);
void deinit_python();
void execute_python_file(const char* python_file);
std::string parse_python_exception();
void arch_appendinittab();
#endif /* end of include guard: COMMON_PYBINDINGS_HH */
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