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Update pythoncapi_compat.h #18535

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Jan 27, 2025
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Update pythoncapi_compat.h #18535

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264 changes: 263 additions & 1 deletion mypyc/lib-rt/pythoncapi_compat.h
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@ extern "C" {
#endif

#include <Python.h>
#include <stddef.h> // offsetof()

// Python 3.11.0b4 added PyFrame_Back() to Python.h
#if PY_VERSION_HEX < 0x030b00B4 && !defined(PYPY_VERSION)
Expand Down Expand Up @@ -583,7 +584,7 @@ static inline int PyWeakref_GetRef(PyObject *ref, PyObject **pobj)
return 0;
}
*pobj = Py_NewRef(obj);
return (*pobj != NULL);
return 1;
}
#endif

Expand Down Expand Up @@ -1933,6 +1934,267 @@ PyLongWriter_Finish(PyLongWriter *writer)
#endif


// gh-127350 added Py_fopen() and Py_fclose() to Python 3.14a4
#if PY_VERSION_HEX < 0x030E00A4
static inline FILE* Py_fopen(PyObject *path, const char *mode)
{
#if 0x030400A2 <= PY_VERSION_HEX && !defined(PYPY_VERSION)
extern FILE* _Py_fopen_obj(PyObject *path, const char *mode);
return _Py_fopen_obj(path, mode);
#else
FILE *f;
PyObject *bytes;
#if PY_VERSION_HEX >= 0x03000000
if (!PyUnicode_FSConverter(path, &bytes)) {
return NULL;
}
#else
if (!PyString_Check(path)) {
PyErr_SetString(PyExc_TypeError, "except str");
return NULL;
}
bytes = Py_NewRef(path);
#endif
const char *path_bytes = PyBytes_AS_STRING(bytes);

f = fopen(path_bytes, mode);
Py_DECREF(bytes);

if (f == NULL) {
PyErr_SetFromErrnoWithFilenameObject(PyExc_OSError, path);
return NULL;
}
return f;
#endif
}

static inline int Py_fclose(FILE *file)
{
return fclose(file);
}
#endif


#if 0x03090000 <= PY_VERSION_HEX && PY_VERSION_HEX < 0x030E0000 && !defined(PYPY_VERSION)
static inline PyObject*
PyConfig_Get(const char *name)
{
typedef enum {
_PyConfig_MEMBER_INT,
_PyConfig_MEMBER_UINT,
_PyConfig_MEMBER_ULONG,
_PyConfig_MEMBER_BOOL,
_PyConfig_MEMBER_WSTR,
_PyConfig_MEMBER_WSTR_OPT,
_PyConfig_MEMBER_WSTR_LIST,
} PyConfigMemberType;

typedef struct {
const char *name;
size_t offset;
PyConfigMemberType type;
const char *sys_attr;
} PyConfigSpec;

#define PYTHONCAPI_COMPAT_SPEC(MEMBER, TYPE, sys_attr) \
{#MEMBER, offsetof(PyConfig, MEMBER), \
_PyConfig_MEMBER_##TYPE, sys_attr}

static const PyConfigSpec config_spec[] = {
PYTHONCAPI_COMPAT_SPEC(argv, WSTR_LIST, "argv"),
PYTHONCAPI_COMPAT_SPEC(base_exec_prefix, WSTR_OPT, "base_exec_prefix"),
PYTHONCAPI_COMPAT_SPEC(base_executable, WSTR_OPT, "_base_executable"),
PYTHONCAPI_COMPAT_SPEC(base_prefix, WSTR_OPT, "base_prefix"),
PYTHONCAPI_COMPAT_SPEC(bytes_warning, UINT, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(exec_prefix, WSTR_OPT, "exec_prefix"),
PYTHONCAPI_COMPAT_SPEC(executable, WSTR_OPT, "executable"),
PYTHONCAPI_COMPAT_SPEC(inspect, BOOL, _Py_NULL),
#if 0x030C0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(int_max_str_digits, UINT, _Py_NULL),
#endif
PYTHONCAPI_COMPAT_SPEC(interactive, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(module_search_paths, WSTR_LIST, "path"),
PYTHONCAPI_COMPAT_SPEC(optimization_level, UINT, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(parser_debug, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(platlibdir, WSTR, "platlibdir"),
PYTHONCAPI_COMPAT_SPEC(prefix, WSTR_OPT, "prefix"),
PYTHONCAPI_COMPAT_SPEC(pycache_prefix, WSTR_OPT, "pycache_prefix"),
PYTHONCAPI_COMPAT_SPEC(quiet, BOOL, _Py_NULL),
#if 0x030B0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(stdlib_dir, WSTR_OPT, "_stdlib_dir"),
#endif
PYTHONCAPI_COMPAT_SPEC(use_environment, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(verbose, UINT, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(warnoptions, WSTR_LIST, "warnoptions"),
PYTHONCAPI_COMPAT_SPEC(write_bytecode, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(xoptions, WSTR_LIST, "_xoptions"),
PYTHONCAPI_COMPAT_SPEC(buffered_stdio, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(check_hash_pycs_mode, WSTR, _Py_NULL),
#if 0x030B0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(code_debug_ranges, BOOL, _Py_NULL),
#endif
PYTHONCAPI_COMPAT_SPEC(configure_c_stdio, BOOL, _Py_NULL),
#if 0x030D0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(cpu_count, INT, _Py_NULL),
#endif
PYTHONCAPI_COMPAT_SPEC(dev_mode, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(dump_refs, BOOL, _Py_NULL),
#if 0x030B0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(dump_refs_file, WSTR_OPT, _Py_NULL),
#endif
#ifdef Py_GIL_DISABLED
PYTHONCAPI_COMPAT_SPEC(enable_gil, INT, _Py_NULL),
#endif
PYTHONCAPI_COMPAT_SPEC(faulthandler, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(filesystem_encoding, WSTR, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(filesystem_errors, WSTR, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(hash_seed, ULONG, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(home, WSTR_OPT, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(import_time, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(install_signal_handlers, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(isolated, BOOL, _Py_NULL),
#ifdef MS_WINDOWS
PYTHONCAPI_COMPAT_SPEC(legacy_windows_stdio, BOOL, _Py_NULL),
#endif
PYTHONCAPI_COMPAT_SPEC(malloc_stats, BOOL, _Py_NULL),
#if 0x030A0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(orig_argv, WSTR_LIST, "orig_argv"),
#endif
PYTHONCAPI_COMPAT_SPEC(parse_argv, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(pathconfig_warnings, BOOL, _Py_NULL),
#if 0x030C0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(perf_profiling, UINT, _Py_NULL),
#endif
PYTHONCAPI_COMPAT_SPEC(program_name, WSTR, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(run_command, WSTR_OPT, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(run_filename, WSTR_OPT, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(run_module, WSTR_OPT, _Py_NULL),
#if 0x030B0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(safe_path, BOOL, _Py_NULL),
#endif
PYTHONCAPI_COMPAT_SPEC(show_ref_count, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(site_import, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(skip_source_first_line, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(stdio_encoding, WSTR, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(stdio_errors, WSTR, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(tracemalloc, UINT, _Py_NULL),
#if 0x030B0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(use_frozen_modules, BOOL, _Py_NULL),
#endif
PYTHONCAPI_COMPAT_SPEC(use_hash_seed, BOOL, _Py_NULL),
PYTHONCAPI_COMPAT_SPEC(user_site_directory, BOOL, _Py_NULL),
#if 0x030A0000 <= PY_VERSION_HEX
PYTHONCAPI_COMPAT_SPEC(warn_default_encoding, BOOL, _Py_NULL),
#endif
};

#undef PYTHONCAPI_COMPAT_SPEC

const PyConfigSpec *spec;
int found = 0;
for (size_t i=0; i < sizeof(config_spec) / sizeof(config_spec[0]); i++) {
spec = &config_spec[i];
if (strcmp(spec->name, name) == 0) {
found = 1;
break;
}
}
if (found) {
if (spec->sys_attr != NULL) {
PyObject *value = PySys_GetObject(spec->sys_attr);
if (value == NULL) {
PyErr_Format(PyExc_RuntimeError, "lost sys.%s", spec->sys_attr);
return NULL;
}
return Py_NewRef(value);
}

extern const PyConfig* _Py_GetConfig(void);
const PyConfig *config = _Py_GetConfig();
void *member = (char *)config + spec->offset;
switch (spec->type) {
case _PyConfig_MEMBER_INT:
case _PyConfig_MEMBER_UINT:
{
int value = *(int *)member;
return PyLong_FromLong(value);
}
case _PyConfig_MEMBER_BOOL:
{
int value = *(int *)member;
return PyBool_FromLong(value != 0);
}
case _PyConfig_MEMBER_ULONG:
{
unsigned long value = *(unsigned long *)member;
return PyLong_FromUnsignedLong(value);
}
case _PyConfig_MEMBER_WSTR:
case _PyConfig_MEMBER_WSTR_OPT:
{
wchar_t *wstr = *(wchar_t **)member;
if (wstr != NULL) {
return PyUnicode_FromWideChar(wstr, -1);
}
else {
return Py_NewRef(Py_None);
}
}
case _PyConfig_MEMBER_WSTR_LIST:
{
const PyWideStringList *list = (const PyWideStringList *)member;
PyObject *tuple = PyTuple_New(list->length);
if (tuple == NULL) {
return NULL;
}

for (Py_ssize_t i = 0; i < list->length; i++) {
PyObject *item = PyUnicode_FromWideChar(list->items[i], -1);
if (item == NULL) {
Py_DECREF(tuple);
return NULL;
}
PyTuple_SET_ITEM(tuple, i, item);
}
return tuple;
}
default:
Py_UNREACHABLE();
}
}

PyErr_Format(PyExc_ValueError, "unknown config option name: %s", name);
return NULL;
}

static inline int
PyConfig_GetInt(const char *name, int *value)
{
PyObject *obj = PyConfig_Get(name);
if (obj == NULL) {
return -1;
}

if (!PyLong_Check(obj)) {
Py_DECREF(obj);
PyErr_Format(PyExc_TypeError, "config option %s is not an int", name);
return -1;
}

int as_int = PyLong_AsInt(obj);
Py_DECREF(obj);
if (as_int == -1 && PyErr_Occurred()) {
PyErr_Format(PyExc_OverflowError,
"config option %s value does not fit into a C int", name);
return -1;
}

*value = as_int;
return 0;
}
#endif // PY_VERSION_HEX > 0x03090000 && !defined(PYPY_VERSION)


#ifdef __cplusplus
}
#endif
Expand Down
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