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python: Developing context wrappers for maps

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Signed-off-by: David Shah <davey1576@gmail.com>
This commit is contained in:
David Shah
2018-07-03 10:55:32 +02:00
parent 45ec502ded
commit a382d906ef
5 changed files with 87 additions and 27 deletions
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6
common/pybindings.cc
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@@ -107,9 +107,9 @@ BOOST_PYTHON_MODULE(MODULE_NAME)
// WRAP_MAP(decltype(CellInfo::ports), "IdPortMap");
// WRAP_MAP(decltype(CellInfo::pins), "IdIdMap");
class_<BaseCtx, BaseCtx *, boost::noncopyable>("BaseCtx", no_init)
.add_property("nets", make_getter(&Context::nets, return_internal_reference<>()))
.add_property("cells", make_getter(&Context::cells, return_internal_reference<>()));
class_<BaseCtx, BaseCtx *, boost::noncopyable>("BaseCtx", no_init);
//.add_property("nets", make_getter(&Context::nets, return_internal_reference<>()))
//.add_property("cells", make_getter(&Context::cells, return_internal_reference<>()));
// WRAP_MAP_UPTR(decltype(Context::nets), "IdNetMap");
// WRAP_MAP_UPTR(decltype(Context::cells), "IdCellMap");

7
common/pybindings.h
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@@ -72,6 +72,13 @@ template <> struct string_converter<IdString>
inline std::string to_str(Context *ctx, IdString id) { return id.str(ctx); }
};
template <> struct string_converter<const IdString>
{
inline IdString from_str(Context *ctx, std::string name) { return ctx->id(name); }
inline std::string to_str(Context *ctx, IdString id) { return id.str(ctx); }
};
} // namespace PythonConversion
NEXTPNR_NAMESPACE_END

66
common/pycontainers.h
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@@ -112,7 +112,7 @@ struct range_wrapper
iterator_wrapper<iterator_t, P, value_conv>().wrap(iter_name);
}
typedef iterator_wrapper<iterator_t, P> iter_wrap;
typedef iterator_wrapper<iterator_t, P, value_conv> iter_wrap;
};
#define WRAP_RANGE(t, conv) \
@@ -288,18 +288,20 @@ Special case of above for map key/values where value is a unique_ptr
template <typename T1, typename T2> struct map_pair_wrapper_uptr
{
typedef std::pair<T1, T2> T;
typedef PythonConversion::ContextualWrapper<T &> wrapped_pair;
typedef typename T::second_type::element_type V;
struct pair_iterator_wrapper
{
static object next(std::pair<T &, int> &iter)
static object next(std::pair<wrapped_pair &, int> &iter)
{
if (iter.second == 0) {
iter.second++;
return object(iter.first.first);
return object(PythonConversion::string_converter<typeof(iter.first.base.first)>().to_str(
iter.first.ctx, iter.first.base.first));
} else if (iter.second == 1) {
iter.second++;
return object(iter.first.second.get());
return object(PythonConversion::ContextualWrapper<V &>(iter.first.ctx, *iter.first.base.second.get()));
} else {
PyErr_SetString(PyExc_StopIteration, "End of range reached");
boost::python::throw_error_already_set();
@@ -311,32 +313,41 @@ template <typename T1, typename T2> struct map_pair_wrapper_uptr
static void wrap(const char *python_name)
{
class_<std::pair<T &, int>>(python_name, no_init).def("__next__", next);
class_<std::pair<wrapped_pair &, int>>(python_name, no_init).def("__next__", next);
}
};
static object get(T &x, int i)
static object get(wrapped_pair &x, int i)
{
if ((i >= 2) || (i < 0))
KeyError();
return (i == 1) ? object(x.second.get()) : object(x.first);
return (i == 1) ? object(PythonConversion::ContextualWrapper<V &>(x.ctx, *x.base.second.get()))
: object(x.base.first);
}
static int len(T &x) { return 2; }
static int len(wrapped_pair &x) { return 2; }
static std::pair<T &, int> iter(T &x) { return std::make_pair(boost::ref(x), 0); };
static std::pair<wrapped_pair &, int> iter(wrapped_pair &x) { return std::make_pair(boost::ref(x), 0); };
static V &second_getter(T &t) { return *t.second.get(); }
static std::string first_getter(wrapped_pair &t)
{
return PythonConversion::string_converter<typeof(t.base.first)>().to_str(t.ctx, t.base.first);
}
static PythonConversion::ContextualWrapper<V &> second_getter(wrapped_pair &t)
{
return PythonConversion::ContextualWrapper<V &>(t.ctx, *t.base.second.get());
}
static void wrap(const char *pair_name, const char *iter_name)
{
pair_iterator_wrapper::wrap(iter_name);
class_<T, boost::noncopyable>(pair_name, no_init)
class_<wrapped_pair, boost::noncopyable>(pair_name, no_init)
.def("__iter__", iter)
.def("__len__", len)
.def("__getitem__", get)
.def_readonly("first", &T::first)
.add_property("second", make_function(second_getter, return_internal_reference<>()));
.add_property("first", first_getter)
.add_property("second", second_getter);
}
};
@@ -348,22 +359,29 @@ template <typename T> struct map_wrapper_uptr
{
typedef typename std::remove_cv<typename std::remove_reference<typename T::key_type>::type>::type K;
typedef typename T::mapped_type::pointer V;
typedef typename T::mapped_type::element_type &Vr;
typedef typename T::value_type KV;
typedef typename PythonConversion::ContextualWrapper<T &> wrapped_map;
static V get(T &x, K const &i)
static PythonConversion::ContextualWrapper<Vr> get(wrapped_map &x, std::string const &i)
{
if (x.find(i) != x.end())
return x.at(i).get();
K k = PythonConversion::string_converter<K>().from_str(x.ctx, i);
if (x.base.find(k) != x.base.end())
return PythonConversion::ContextualWrapper<Vr>(x.ctx, *x.base.at(k).get());
KeyError();
std::terminate();
}
static void set(T &x, K const &i, V const &v) { x[i] = typename T::mapped_type(v); }
static void del(T const &x, K const &i)
static void set(wrapped_map &x, std::string const &i, V const &v)
{
if (x.find(i) != x.end())
x.erase(i);
x.base[PythonConversion::string_converter<K>().from_str(x.ctx, i)] = typename T::mapped_type(v);
}
static void del(T const &x, std::string const &i)
{
K k = PythonConversion::string_converter<K>().from_str(x.ctx, i);
if (x.base.find(k) != x.base.end())
x.base.erase(k);
else
KeyError();
std::terminate();
@@ -372,12 +390,12 @@ template <typename T> struct map_wrapper_uptr
static void wrap(const char *map_name, const char *kv_name, const char *kv_iter_name, const char *iter_name)
{
map_pair_wrapper_uptr<typename KV::first_type, typename KV::second_type>::wrap(kv_name, kv_iter_name);
typedef range_wrapper<T, return_internal_reference<>> rw;
typedef range_wrapper<T, return_value_policy<return_by_value>, PythonConversion::wrap_context<KV &>> rw;
typename rw::iter_wrap().wrap(iter_name);
class_<T, boost::noncopyable>(map_name, no_init)
class_<wrapped_map, boost::noncopyable>(map_name, no_init)
.def("__iter__", rw::iter)
.def("__len__", &T::size)
.def("__getitem__", get, return_internal_reference<>())
.def("__getitem__", get)
.def("__setitem__", set, with_custodian_and_ward<1, 2>());
}
};

19
common/pywrappers.h
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@@ -150,6 +150,25 @@ template <typename Class, typename FuncT, FuncT fn, typename rv_conv, typename a
template <typename WrapCls> static void def_wrap(WrapCls cls_, const char *name) { cls_.def(name, wrapped_fn); }
};
// Wrapped getter
template <typename Class, typename MemT, MemT mem, typename v_conv> struct readonly_wrapper
{
using class_type = typename WrapIfNotContext<Class>::maybe_wrapped_t;
using conv_val_type = typename v_conv::ret_type;
static conv_val_type wrapped_getter(class_type &cls)
{
Context *ctx = get_ctx<Class>(cls);
Class &base = get_base<Class>(cls);
return v_conv()(ctx, (base.*mem));
}
template <typename WrapCls> static void def_wrap(WrapCls cls_, const char *name)
{
cls_.add_property(name, wrapped_getter);
}
};
} // namespace PythonConversion
NEXTPNR_NAMESPACE_END