From e576f71838290ff12b98145fb02af84563fc03c1 Mon Sep 17 00:00:00 2001 From: David Shah Date: Thu, 7 Jun 2018 11:41:54 +0200 Subject: Developing Python bindings for Design and related types --- common/pycontainers.h | 129 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 129 insertions(+) create mode 100644 common/pycontainers.h (limited to 'common/pycontainers.h') diff --git a/common/pycontainers.h b/common/pycontainers.h new file mode 100644 index 00000000..64fb265b --- /dev/null +++ b/common/pycontainers.h @@ -0,0 +1,129 @@ +/* + * nextpnr -- Next Generation Place and Route + * + * Copyright (C) 2018 Clifford Wolf + * Copyright (C) 2018 David Shah + * + * 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_PYCONTAINERS_H +#define COMMON_PYCONTAINERS_H + +#include +#include +#include +#include +#include +#include +#include + +using namespace boost::python; + +/* +A wrapper for a Pythonised nextpnr Iterator. The actual class wrapped is a +pair containing (current, end) +*/ + +template +struct iterator_wrapper { + typedef decltype(*(std::declval())) value_t; + + static value_t next(std::pair &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, P()); + } +}; + +/* +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> +struct range_wrapper { + typedef decltype(std::declval().begin()) iterator_t; + + static std::pair iter(T &range) { + return std::make_pair(range.begin(), range.end()); + } + + static void wrap(const char *range_name, const char *iter_name) { + class_(range_name, no_init) + .def("__iter__", iter); + iterator_wrapper().wrap(iter_name); + } + typedef iterator_wrapper iter_wrap; +}; + +#define WRAP_RANGE(t) range_wrapper().wrap(#t "Range", #t "Iterator") + +/* +Wrapper for a map, either an unordered_map, regular map or dict + */ +inline void KeyError() { PyErr_SetString(PyExc_KeyError, "Key not found"); } + +template +struct map_wrapper { + typedef boost::remove_cv_t> K; + typedef typename T::mapped_type V; + typedef typename T::value_type KV; + + static V &get(T &x, K const &i) { + if (x.find(i) != x.end()) return x.at(i); + KeyError(); + std::terminate(); + } + + static void set(T &x, K const &i, V const &v) { + x[i] = v; + } + + static void del(T const &x, K const &i) { + if (x.find(i) != x.end()) x.erase(i); + else KeyError(); + std::terminate(); + } + + static void wrap(const char *map_name, const char *kv_name, const char *iter_name) { + class_(kv_name) + .def_readonly("first", &KV::first) + .def_readwrite("second", &KV::second); + typedef range_wrapper> rw; + typename rw::iter_wrap().wrap(iter_name); + class_(map_name, no_init) + .def("__iter__", rw::iter) + .def("__len__", &T::size) + .def("__getitem__", get, return_internal_reference<>()) + .def("__setitem__", set, with_custodian_and_ward<1,2>()); + } +}; + +#define WRAP_MAP(t, name) map_wrapper().wrap(#name, #name "KeyValue", #name "Iterator") + +#endif -- cgit v1.2.3 From ed0c44891fb510c8181c2ae9332d7a030f0aaaff Mon Sep 17 00:00:00 2001 From: David Shah Date: Thu, 7 Jun 2018 13:36:42 +0200 Subject: Replacing Boost type_traits with std Signed-off-by: David Shah --- common/pycontainers.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'common/pycontainers.h') diff --git a/common/pycontainers.h b/common/pycontainers.h index 64fb265b..6e2cdea9 100644 --- a/common/pycontainers.h +++ b/common/pycontainers.h @@ -90,7 +90,7 @@ inline void KeyError() { PyErr_SetString(PyExc_KeyError, "Key not found"); } template struct map_wrapper { - typedef boost::remove_cv_t> K; + typedef typename std::remove_cv::type>::type K; typedef typename T::mapped_type V; typedef typename T::value_type KV; -- cgit v1.2.3