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#include <Python.h>
#include "pegen_interface.h"
static int
_mode_str_to_int(char *mode_str)
{
int mode;
if (strcmp(mode_str, "exec") == 0) {
mode = Py_file_input;
}
else if (strcmp(mode_str, "eval") == 0) {
mode = Py_eval_input;
}
else if (strcmp(mode_str, "single") == 0) {
mode = Py_single_input;
}
else {
mode = -1;
}
return mode;
}
static mod_ty
_run_parser(char *str, char *filename, int mode, PyCompilerFlags *flags, PyArena *arena, int oldparser)
{
mod_ty mod;
if (!oldparser) {
mod = PyPegen_ASTFromString(str, filename, mode, flags, arena);
}
else {
mod = PyParser_ASTFromString(str, filename, mode, flags, arena);
}
return mod;
}
PyObject *
_Py_compile_string(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"string", "filename", "mode", "oldparser", NULL};
char *the_string;
char *filename = "<string>";
char *mode_str = "exec";
int oldparser = 0;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|ssp", keywords,
&the_string, &filename, &mode_str, &oldparser)) {
return NULL;
}
int mode = _mode_str_to_int(mode_str);
if (mode == -1) {
return PyErr_Format(PyExc_ValueError, "mode must be either 'exec' or 'eval' or 'single'");
}
PyCompilerFlags flags = _PyCompilerFlags_INIT;
flags.cf_flags = PyCF_IGNORE_COOKIE;
PyArena *arena = PyArena_New();
if (arena == NULL) {
return NULL;
}
mod_ty mod = _run_parser(the_string, filename, mode, &flags, arena, oldparser);
if (mod == NULL) {
PyArena_Free(arena);
return NULL;
}
PyObject *filename_ob = PyUnicode_DecodeFSDefault(filename);
if (filename_ob == NULL) {
PyArena_Free(arena);
return NULL;
}
PyCodeObject *result = PyAST_CompileObject(mod, filename_ob, &flags, -1, arena);
Py_XDECREF(filename_ob);
PyArena_Free(arena);
return (PyObject *)result;
}
PyObject *
_Py_parse_string(PyObject *self, PyObject *args, PyObject *kwds)
{
static char *keywords[] = {"string", "filename", "mode", "oldparser", NULL};
char *the_string;
char *filename = "<string>";
char *mode_str = "exec";
int oldparser = 0;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "s|ssp", keywords,
&the_string, &filename, &mode_str, &oldparser)) {
return NULL;
}
int mode = _mode_str_to_int(mode_str);
if (mode == -1) {
return PyErr_Format(PyExc_ValueError, "mode must be either 'exec' or 'eval' or 'single'");
}
PyCompilerFlags flags = _PyCompilerFlags_INIT;
flags.cf_flags = PyCF_IGNORE_COOKIE;
PyArena *arena = PyArena_New();
if (arena == NULL) {
return NULL;
}
mod_ty mod = _run_parser(the_string, filename, mode, &flags, arena, oldparser);
if (mod == NULL) {
PyArena_Free(arena);
return NULL;
}
PyObject *result = PyAST_mod2obj(mod);
PyArena_Free(arena);
return result;
}
static PyMethodDef ParseMethods[] = {
{
"parse_string",
(PyCFunction)(void (*)(void))_Py_parse_string,
METH_VARARGS|METH_KEYWORDS,
"Parse a string, return an AST."
},
{
"compile_string",
(PyCFunction)(void (*)(void))_Py_compile_string,
METH_VARARGS|METH_KEYWORDS,
"Compile a string, return a code object."
},
{NULL, NULL, 0, NULL} /* Sentinel */
};
static struct PyModuleDef parsemodule = {
PyModuleDef_HEAD_INIT,
.m_name = "peg_parser",
.m_doc = "A parser.",
.m_methods = ParseMethods,
};
PyMODINIT_FUNC
PyInit__peg_parser(void)
{
return PyModule_Create(&parsemodule);
}
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