coco
74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
// Copyright (C) 2013 Davis E. King (davis@dlib.net)
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// License: Boost Software License See LICENSE.txt for the full license.
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#ifndef DLIB_SERIALIZE_PiCKLE_Hh_
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#define DLIB_SERIALIZE_PiCKLE_Hh_
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#include <dlib/serialize.h>
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#include <pybind11/pybind11.h>
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#include <sstream>
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#include <dlib/vectorstream.h>
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namespace py = pybind11;
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namespace dlib
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{
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template<typename T>
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py::tuple getstate(const T& item)
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{
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using namespace dlib;
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std::vector<char> buf;
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buf.reserve(5000);
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vectorstream sout(buf);
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serialize(item, sout);
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return py::make_tuple(py::handle(
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PyBytes_FromStringAndSize(buf.size()?&buf[0]:0, buf.size())));
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}
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template<typename T>
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T setstate(py::tuple state)
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{
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using namespace dlib;
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if (len(state) != 1)
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{
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PyErr_SetObject(PyExc_ValueError,
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py::str("expected 1-item tuple in call to __setstate__; got {}").format(state).ptr()
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);
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throw py::error_already_set();
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}
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// We used to serialize by converting to a str but the boost.python routines for
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// doing this don't work in Python 3. You end up getting an error about invalid
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// UTF-8 encodings. So instead we access the python C interface directly and use
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// bytes objects. However, we keep the deserialization code that worked with str
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// for backwards compatibility with previously pickled files.
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T item;
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py::object obj = state[0];
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if (py::isinstance<py::str>(obj))
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{
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py::str data = state[0].cast<py::str>();
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std::string temp = data;
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std::istringstream sin(temp);
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deserialize(item, sin);
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}
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else if(PyBytes_Check(py::object(state[0]).ptr()))
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{
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py::object obj = state[0];
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char* data = PyBytes_AsString(obj.ptr());
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unsigned long num = PyBytes_Size(obj.ptr());
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std::istringstream sin(std::string(data, num));
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deserialize(item, sin);
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}
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else
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{
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throw error("Unable to unpickle, error in input file.");
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}
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return item;
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}
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}
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#endif // DLIB_SERIALIZE_PiCKLE_Hh_
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