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authorDavid Shah <davey1576@gmail.com>2018-06-01 15:02:38 +0200
committerDavid Shah <davey1576@gmail.com>2018-06-02 13:48:28 +0200
commita7415bfbc34d1c0aae6ca0843600e88cded23b1c (patch)
tree3ab3210e9c6cdf9370534e0f1a9a49d40e08a46c /common/pybindings.cc
parentd62f7abd9561f1ac5085eadb21030211e7cabf4f (diff)
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Adding generic Python range and iterator bindings
Signed-off-by: David Shah <davey1576@gmail.com>
Diffstat (limited to 'common/pybindings.cc')
-rw-r--r--common/pybindings.cc86
1 files changed, 83 insertions, 3 deletions
diff --git a/common/pybindings.cc b/common/pybindings.cc
index 43e474e1..0990c00c 100644
--- a/common/pybindings.cc
+++ b/common/pybindings.cc
@@ -1,15 +1,95 @@
+/*
+ * 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.
+ *
+ */
+
#include "design.h"
#include "chip.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;
-#define PASTER(x,y) x ## _ ## y
-#define EVALUATOR(x,y) PASTER(x,y)
+#define PASTER(x, y) x ## _ ## y
+#define EVALUATOR(x, y) PASTER(x,y)
#define MODULE_NAME EVALUATOR(nextpnrpy, ARCHNAME)
+/*
+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
+*/
+inline object pass_through(object const &o) { return o; }
+
+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);
+ }
+};
+
+#define WRAP_RANGE(t) range_wrapper<t##Range>().wrap(#t "Range", #t "Iterator")
+
BOOST_PYTHON_MODULE (MODULE_NAME) {
+ // From Chip.h
+ class_<ChipArgs>("ChipArgs");
+ WRAP_RANGE(Bels);
+ WRAP_RANGE(AllWires);
+ WRAP_RANGE(WireDelay);
+ WRAP_RANGE(BelPin);
}