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#include "pegen.h"
#include "pycore_compile.h" // _PyAST_Compile()
PyObject *
_build_return_object(mod_ty module, int mode, PyObject *filename_ob, PyArena *arena)
{
PyObject *result = NULL;
if (mode == 2) {
result = (PyObject *)_PyAST_Compile(module, filename_ob, NULL, -1, arena);
} else if (mode == 1) {
result = PyAST_mod2obj(module);
} else {
result = Py_None;
Py_INCREF(result);
}
return result;
}
static PyObject *
parse_file(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"file", "mode", NULL};
const char *filename;
int mode = 2;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|i", keywords, &filename, &mode)) {
return NULL;
}
if (mode < 0 || mode > 2) {
return PyErr_Format(PyExc_ValueError, "Bad mode, must be 0 <= mode <= 2");
}
PyArena *arena = PyArena_New();
if (arena == NULL) {
return NULL;
}
PyObject *result = NULL;
PyObject *filename_ob = PyUnicode_FromString(filename);
if (filename_ob == NULL) {
goto error;
}
PyCompilerFlags flags = _PyCompilerFlags_INIT;
mod_ty res = _PyPegen_run_parser_from_file(filename, Py_file_input, filename_ob, &flags, arena);
if (res == NULL) {
goto error;
}
result = _build_return_object(res, mode, filename_ob, arena);
error:
Py_XDECREF(filename_ob);
PyArena_Free(arena);
return result;
}
static PyObject *
parse_string(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"str", "mode", NULL};
const char *the_string;
int mode = 2;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|i", keywords, &the_string, &mode)) {
return NULL;
}
if (mode < 0 || mode > 2) {
return PyErr_Format(PyExc_ValueError, "Bad mode, must be 0 <= mode <= 2");
}
PyArena *arena = PyArena_New();
if (arena == NULL) {
return NULL;
}
PyObject *result = NULL;
PyObject *filename_ob = PyUnicode_FromString("<string>");
if (filename_ob == NULL) {
goto error;
}
PyCompilerFlags flags = _PyCompilerFlags_INIT;
mod_ty res = _PyPegen_run_parser_from_string(the_string, Py_file_input, filename_ob,
&flags, arena);
if (res == NULL) {
goto error;
}
result = _build_return_object(res, mode, filename_ob, arena);
error:
Py_XDECREF(filename_ob);
PyArena_Free(arena);
return result;
}
static PyObject *
clear_memo_stats(PyObject *Py_UNUSED(self), PyObject *Py_UNUSED(ignored))
{
_PyPegen_clear_memo_statistics();
Py_RETURN_NONE;
}
static PyObject *
get_memo_stats(PyObject *Py_UNUSED(self), PyObject *Py_UNUSED(ignored))
{
return _PyPegen_get_memo_statistics();
}
// TODO: Write to Python's sys.stdout instead of C's stdout.
static PyObject *
dump_memo_stats(PyObject *Py_UNUSED(self), PyObject *Py_UNUSED(ignored))
{
PyObject *list = _PyPegen_get_memo_statistics();
if (list == NULL) {
return NULL;
}
Py_ssize_t len = PyList_Size(list);
for (Py_ssize_t i = 0; i < len; i++) {
PyObject *value = PyList_GetItem(list, i); // Borrowed reference.
long count = PyLong_AsLong(value);
if (count < 0) {
break;
}
if (count > 0) {
printf("%4zd %9ld\n", i, count);
}
}
Py_DECREF(list);
Py_RETURN_NONE;
}
static PyMethodDef ParseMethods[] = {
{"parse_file", (PyCFunction)(void(*)(void))parse_file, METH_VARARGS|METH_KEYWORDS, "Parse a file."},
{"parse_string", (PyCFunction)(void(*)(void))parse_string, METH_VARARGS|METH_KEYWORDS, "Parse a string."},
{"clear_memo_stats", clear_memo_stats, METH_NOARGS},
{"dump_memo_stats", dump_memo_stats, METH_NOARGS},
{"get_memo_stats", get_memo_stats, METH_NOARGS},
{NULL, NULL, 0, NULL} /* Sentinel */
};
static struct PyModuleDef parsemodule = {
PyModuleDef_HEAD_INIT,
.m_name = "parse",
.m_doc = "A parser.",
.m_methods = ParseMethods,
};
PyMODINIT_FUNC
PyInit_parse(void)
{
return PyModule_Create(&parsemodule);
}
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