cpython/Python/intrinsics.c at 2bd04d423404e5ea862c858f62af76feade4d831 · python/cpython · GitHub

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#define _PY_INTERPRETER

#include "Python.h"

#include "pycore_frame.h"

#include "pycore_function.h"

#include "pycore_runtime.h"

#include "pycore_global_objects.h"

#include "pycore_intrinsics.h"

#include "pycore_pyerrors.h"

#include "pycore_typevarobject.h"

/******** Unary functions ********/

static PyObject *

no_intrinsic1(PyThreadState* tstate, PyObject *unused)

{

_PyErr_SetString(tstate, PyExc_SystemError, "invalid intrinsic function");

return NULL;

}

static PyObject *

print_expr(PyThreadState* tstate, PyObject *value)

{

PyObject *hook = _PySys_GetAttr(tstate, &_Py_ID(displayhook));

// Can't use ERROR_IF here.

if (hook == NULL) {

_PyErr_SetString(tstate, PyExc_RuntimeError,

"lost sys.displayhook");

return NULL;

}

return PyObject_CallOneArg(hook, value);

}

static int

import_all_from(PyThreadState *tstate, PyObject *locals, PyObject *v)

{

PyObject *all, *dict, *name, *value;

int skip_leading_underscores = 0;

int pos, err;

if (PyObject_GetOptionalAttr(v, &_Py_ID(__all__), &all) < 0) {

return -1; /* Unexpected error */

}

if (all == NULL) {

if (PyObject_GetOptionalAttr(v, &_Py_ID(__dict__), &dict) < 0) {

return -1;

}

if (dict == NULL) {

_PyErr_SetString(tstate, PyExc_ImportError,

"from-import-* object has no __dict__ and no __all__");

return -1;

}

all = PyMapping_Keys(dict);

Py_DECREF(dict);

if (all == NULL)

return -1;

skip_leading_underscores = 1;

}

for (pos = 0, err = 0; ; pos++) {

name = PySequence_GetItem(all, pos);

if (name == NULL) {

if (!_PyErr_ExceptionMatches(tstate, PyExc_IndexError)) {

err = -1;

}

else {

_PyErr_Clear(tstate);

}

break;

}

if (!PyUnicode_Check(name)) {

PyObject *modname = PyObject_GetAttr(v, &_Py_ID(__name__));

if (modname == NULL) {

Py_DECREF(name);

err = -1;

break;

}

if (!PyUnicode_Check(modname)) {

_PyErr_Format(tstate, PyExc_TypeError,

"module __name__ must be a string, not %.100s",

Py_TYPE(modname)->tp_name);

}

else {

_PyErr_Format(tstate, PyExc_TypeError,

"%s in %U.%s must be str, not %.100s",

skip_leading_underscores ? "Key" : "Item",

modname,

skip_leading_underscores ? "__dict__" : "__all__",

Py_TYPE(name)->tp_name);

}

Py_DECREF(modname);

Py_DECREF(name);

err = -1;

break;

}

if (skip_leading_underscores) {

if (PyUnicode_READ_CHAR(name, 0) == '_') {

Py_DECREF(name);

continue;

}

value = PyObject_GetAttr(v, name);

if (value == NULL)

err = -1;

else if (PyDict_CheckExact(locals))

err = PyDict_SetItem(locals, name, value);

else

err = PyObject_SetItem(locals, name, value);

Py_DECREF(name);

Py_XDECREF(value);

if (err < 0)

break;

}

Py_DECREF(all);

return err;

}

static PyObject *

import_star(PyThreadState* tstate, PyObject *from)

{

_PyInterpreterFrame *frame = tstate->cframe->current_frame;

if (_PyFrame_FastToLocalsWithError(frame) < 0) {

return NULL;

}

PyObject *locals = frame->f_locals;

if (locals == NULL) {

_PyErr_SetString(tstate, PyExc_SystemError,

"no locals found during 'import *'");

return NULL;

}

int err = import_all_from(tstate, locals, from);

_PyFrame_LocalsToFast(frame, 0);

if (err < 0) {

return NULL;

}

Py_RETURN_NONE;

}

static PyObject *

stopiteration_error(PyThreadState* tstate, PyObject *exc)

{

_PyInterpreterFrame *frame = tstate->cframe->current_frame;

assert(frame->owner == FRAME_OWNED_BY_GENERATOR);

assert(PyExceptionInstance_Check(exc));

const char *msg = NULL;

if (PyErr_GivenExceptionMatches(exc, PyExc_StopIteration)) {

msg = "generator raised StopIteration";

if (_PyFrame_GetCode(frame)->co_flags & CO_ASYNC_GENERATOR) {

msg = "async generator raised StopIteration";

}

else if (_PyFrame_GetCode(frame)->co_flags & CO_COROUTINE) {

msg = "coroutine raised StopIteration";

}

else if ((_PyFrame_GetCode(frame)->co_flags & CO_ASYNC_GENERATOR) &&

PyErr_GivenExceptionMatches(exc, PyExc_StopAsyncIteration))

{

/* code in `gen` raised a StopAsyncIteration error:

raise a RuntimeError.

msg = "async generator raised StopAsyncIteration";

}

if (msg != NULL) {

PyObject *message = _PyUnicode_FromASCII(msg, strlen(msg));

if (message == NULL) {

return NULL;

}

PyObject *error = PyObject_CallOneArg(PyExc_RuntimeError, message);

if (error == NULL) {

Py_DECREF(message);

return NULL;

}

assert(PyExceptionInstance_Check(error));

PyException_SetCause(error, Py_NewRef(exc));

// Steal exc reference, rather than Py_NewRef+Py_DECREF

PyException_SetContext(error, Py_NewRef(exc));

Py_DECREF(message);

return error;

}

return Py_NewRef(exc);

}

static PyObject *

unary_pos(PyThreadState* unused, PyObject *value)

{

return PyNumber_Positive(value);

}

static PyObject *

list_to_tuple(PyThreadState* unused, PyObject *v)

{

assert(PyList_Check(v));

return _PyTuple_FromArray(((PyListObject *)v)->ob_item, Py_SIZE(v));

}

static PyObject *

make_typevar(PyThreadState* Py_UNUSED(ignored), PyObject *v)

{

assert(PyUnicode_Check(v));

return _Py_make_typevar(v, NULL, NULL);

}

#define INTRINSIC_FUNC_ENTRY(N, F) \

[N] = {F, #N},

const intrinsic_func1_info

_PyIntrinsics_UnaryFunctions[] = {

INTRINSIC_FUNC_ENTRY(INTRINSIC_1_INVALID, no_intrinsic1)

INTRINSIC_FUNC_ENTRY(INTRINSIC_PRINT, print_expr)

INTRINSIC_FUNC_ENTRY(INTRINSIC_IMPORT_STAR, import_star)

INTRINSIC_FUNC_ENTRY(INTRINSIC_STOPITERATION_ERROR, stopiteration_error)

INTRINSIC_FUNC_ENTRY(INTRINSIC_ASYNC_GEN_WRAP, _PyAsyncGenValueWrapperNew)

INTRINSIC_FUNC_ENTRY(INTRINSIC_UNARY_POSITIVE, unary_pos)

INTRINSIC_FUNC_ENTRY(INTRINSIC_LIST_TO_TUPLE, list_to_tuple)

INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVAR, make_typevar)

INTRINSIC_FUNC_ENTRY(INTRINSIC_PARAMSPEC, _Py_make_paramspec)

INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVARTUPLE, _Py_make_typevartuple)

INTRINSIC_FUNC_ENTRY(INTRINSIC_SUBSCRIPT_GENERIC, _Py_subscript_generic)

INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEALIAS, _Py_make_typealias)

};

/******** Binary functions ********/

static PyObject *

no_intrinsic2(PyThreadState* tstate, PyObject *unused1, PyObject *unused2)

{

_PyErr_SetString(tstate, PyExc_SystemError, "invalid intrinsic function");

return NULL;

}

static PyObject *

prep_reraise_star(PyThreadState* unused, PyObject *orig, PyObject *excs)

{

assert(PyList_Check(excs));

return _PyExc_PrepReraiseStar(orig, excs);

}

static PyObject *

make_typevar_with_bound(PyThreadState* Py_UNUSED(ignored), PyObject *name,

PyObject *evaluate_bound)

{

assert(PyUnicode_Check(name));

return _Py_make_typevar(name, evaluate_bound, NULL);

}

static PyObject *

make_typevar_with_constraints(PyThreadState* Py_UNUSED(ignored), PyObject *name,

PyObject *evaluate_constraints)

{

assert(PyUnicode_Check(name));

return _Py_make_typevar(name, NULL, evaluate_constraints);

}

const intrinsic_func2_info

_PyIntrinsics_BinaryFunctions[] = {

INTRINSIC_FUNC_ENTRY(INTRINSIC_2_INVALID, no_intrinsic2)

INTRINSIC_FUNC_ENTRY(INTRINSIC_PREP_RERAISE_STAR, prep_reraise_star)

INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVAR_WITH_BOUND, make_typevar_with_bound)

INTRINSIC_FUNC_ENTRY(INTRINSIC_TYPEVAR_WITH_CONSTRAINTS, make_typevar_with_constraints)

INTRINSIC_FUNC_ENTRY(INTRINSIC_SET_FUNCTION_TYPE_PARAMS, _Py_set_function_type_params)

};

#undef INTRINSIC_FUNC_ENTRY

PyObject*

_PyUnstable_GetUnaryIntrinsicName(int index)

{

if (index < 0 || index > MAX_INTRINSIC_1) {

return NULL;

}

return PyUnicode_FromString(_PyIntrinsics_UnaryFunctions[index].name);

}

PyObject*

_PyUnstable_GetBinaryIntrinsicName(int index)

{

if (index < 0 || index > MAX_INTRINSIC_2) {

return NULL;

}

return PyUnicode_FromString(_PyIntrinsics_BinaryFunctions[index].name);

}

cpython/Python/intrinsics.c at 2bd04d423404e5ea862c858f62af76feade4d831 · python/cpython · GitHub

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