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7.26 kB
| ///////////////////// ModuleLoader.proto ////////////////////////// | |
| static PyObject* __Pyx_LoadInternalModule(const char* name, const char* fallback_code); /* proto */ | |
| //////////////////// ModuleLoader /////////////////////// | |
| //@requires: CommonStructures.c::FetchSharedCythonModule | |
| static PyObject* __Pyx_LoadInternalModule(const char* name, const char* fallback_code) { | |
| // We want to be able to use the contents of the standard library dataclasses module where available. | |
| // If those objects aren't available (due to Python version) then a simple fallback is substituted | |
| // instead, which largely just fails with a not-implemented error. | |
| // | |
| // The fallbacks are placed in the "shared abi module" as a convenient internal place to | |
| // store them | |
| PyObject *shared_abi_module = 0, *module = 0; | |
| PyObject *result; | |
| shared_abi_module = __Pyx_FetchSharedCythonABIModule(); | |
| if (!shared_abi_module) return NULL; | |
| if (PyObject_GetOptionalAttrString(shared_abi_module, name, &result) != 0) { | |
| Py_DECREF(shared_abi_module); | |
| return result; | |
| } | |
| if (PyObject_HasAttrString(shared_abi_module, name)) { | |
| PyObject* result = PyObject_GetAttrString(shared_abi_module, name); | |
| Py_DECREF(shared_abi_module); | |
| return result; | |
| } | |
| // the best and simplest case is simply to defer to the standard library (if available) | |
| module = PyImport_ImportModule(name); | |
| if (!module) { | |
| PyObject *localDict, *runValue, *builtins, *modulename; | |
| if (!PyErr_ExceptionMatches(PyExc_ImportError)) goto bad; | |
| PyErr_Clear(); /* this is reasonably likely (especially on older versions of Python) */ | |
| modulename = PyUnicode_FromFormat("_cython_" CYTHON_ABI ".%s", name); | |
| if (!modulename) goto bad; | |
| module = PyImport_AddModuleObject(modulename); /* borrowed */ | |
| module = PyImport_AddModule(PyBytes_AsString(modulename)); /* borrowed */ | |
| Py_DECREF(modulename); | |
| if (!module) goto bad; | |
| Py_INCREF(module); | |
| if (PyObject_SetAttrString(shared_abi_module, name, module) < 0) goto bad; | |
| localDict = PyModule_GetDict(module); /* borrowed */ | |
| if (!localDict) goto bad; | |
| builtins = PyEval_GetBuiltins(); /* borrowed */ | |
| if (!builtins) goto bad; | |
| if (PyDict_SetItemString(localDict, "__builtins__", builtins) <0) goto bad; | |
| { | |
| PyObject *compiled = Py_CompileString(fallback_code, "<dataclass fallback code>", Py_file_input); | |
| if (!compiled) goto bad; | |
| runValue = PyEval_EvalCode(compiled, localDict, localDict); | |
| Py_DECREF(compiled); | |
| } | |
| runValue = PyRun_String(fallback_code, Py_file_input, localDict, localDict); | |
| if (!runValue) goto bad; | |
| Py_DECREF(runValue); | |
| } | |
| goto shared_cleanup; | |
| bad: | |
| Py_CLEAR(module); | |
| shared_cleanup: | |
| Py_XDECREF(shared_abi_module); | |
| return module; | |
| } | |
| ///////////////////// SpecificModuleLoader.proto ////////////////////// | |
| //@substitute: tempita | |
| static PyObject* __Pyx_Load_{{cname}}_Module(void); /* proto */ | |
| //////////////////// SpecificModuleLoader /////////////////////// | |
| //@requires: ModuleLoader | |
| static PyObject* __Pyx_Load_{{cname}}_Module(void) { | |
| return __Pyx_LoadInternalModule("{{cname}}", {{py_code}}); | |
| } | |
| //////////////////// DataclassesCallHelper.proto //////////////////////// | |
| static PyObject* __Pyx_DataclassesCallHelper(PyObject *callable, PyObject *kwds); /* proto */ | |
| //////////////////// DataclassesCallHelper //////////////////////// | |
| // The signature of a few of the dataclasses module functions has | |
| // been expanded over the years. Cython always passes the full set | |
| // of arguments from the most recent version we know of, so needs | |
| // to remove any arguments that don't exist on earlier versions. | |
| static int __Pyx_DataclassesCallHelper_FilterToDict(PyObject *callable, PyObject *kwds, PyObject *new_kwds, PyObject *args_list, int is_kwonly) { | |
| Py_ssize_t size, i; | |
| size = PySequence_Size(args_list); | |
| if (unlikely(size < 0)) return -1; | |
| for (i=0; i<size; ++i) { | |
| PyObject *key, *value; | |
| int setitem_result; | |
| key = PySequence_GetItem(args_list, i); | |
| if (!key) return -1; | |
| if (PyUnicode_Check(key) && ( | |
| PyUnicode_CompareWithASCIIString(key, "self") == 0 || | |
| // namedtuple constructor in fallback code | |
| PyUnicode_CompareWithASCIIString(key, "_cls") == 0)) { | |
| Py_DECREF(key); | |
| continue; | |
| } | |
| value = PyDict_GetItem(kwds, key); | |
| if (!value) { | |
| if (is_kwonly) { | |
| Py_DECREF(key); | |
| continue; | |
| } else { | |
| // The most likely reason for this is that Cython | |
| // hasn't kept up to date with the Python dataclasses module. | |
| // To be nice to our users, try not to fail, but ask them | |
| // to report a bug so we can keep up to date. | |
| value = Py_None; | |
| if (PyErr_WarnFormat( | |
| PyExc_RuntimeWarning, 1, | |
| "Argument %S not passed to %R. This is likely a bug in Cython so please report it.", | |
| key, callable) == -1) { | |
| Py_DECREF(key); | |
| return -1; | |
| } | |
| } | |
| } | |
| Py_INCREF(value); | |
| setitem_result = PyDict_SetItem(new_kwds, key, value); | |
| Py_DECREF(key); | |
| Py_DECREF(value); | |
| if (setitem_result == -1) return -1; | |
| } | |
| return 0; | |
| } | |
| static PyObject* __Pyx_DataclassesCallHelper(PyObject *callable, PyObject *kwds) { | |
| PyObject *new_kwds=NULL, *result=NULL; | |
| PyObject *inspect; | |
| PyObject *args_list=NULL, *kwonly_args_list=NULL, *getfullargspec_result=NULL; | |
| // Going via inspect to work out what arguments to pass is unlikely to be the | |
| // fastest thing ever. However, it is compatible, and only happens once | |
| // at module-import time. | |
| inspect = PyImport_ImportModule("inspect"); | |
| if (!inspect) goto bad; | |
| getfullargspec_result = PyObject_CallMethodObjArgs(inspect, PYUNICODE("getfullargspec"), callable, NULL); | |
| Py_DECREF(inspect); | |
| if (!getfullargspec_result) goto bad; | |
| args_list = PyObject_GetAttrString(getfullargspec_result, "args"); | |
| if (!args_list) goto bad; | |
| kwonly_args_list = PyObject_GetAttrString(getfullargspec_result, "kwonlyargs"); | |
| if (!kwonly_args_list) goto bad; | |
| new_kwds = PyDict_New(); | |
| if (!new_kwds) goto bad; | |
| // copy over only those arguments that are in the specification | |
| if (__Pyx_DataclassesCallHelper_FilterToDict(callable, kwds, new_kwds, args_list, 0) == -1) goto bad; | |
| if (__Pyx_DataclassesCallHelper_FilterToDict(callable, kwds, new_kwds, kwonly_args_list, 1) == -1) goto bad; | |
| result = PyObject_Call(callable, EMPTY(tuple), new_kwds); | |
| bad: | |
| Py_XDECREF(getfullargspec_result); | |
| Py_XDECREF(args_list); | |
| Py_XDECREF(kwonly_args_list); | |
| Py_XDECREF(new_kwds); | |
| return result; | |
| } | |