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Commit8a52253

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Add PyConfig_Get() (#128)
1 parentb1b2071 commit8a52253

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4 files changed

+296
-2
lines changed

4 files changed

+296
-2
lines changed

‎docs/api.rst

Lines changed: 8 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -177,11 +177,17 @@ Python 3.14
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178178
See `Py_fclose() documentation <https://docs.python.org/dev/c-api/sys.html#c.Py_fclose>`__.
179179

180+
.. c:function:: PyObject* PyConfig_Get(const char *name)
181+
182+
See `PyConfig_Get() documentation <https://docs.python.org/dev/c-api/init_config.html#c.PyConfig_Get>`__.
183+
184+
.. c:function:: int PyConfig_GetInt(const char *name, int *value)
185+
186+
See `PyConfig_GetInt() documentation <https://docs.python.org/dev/c-api/init_config.html#c.PyConfig_GetInt>`__.
187+
180188

181189
Not supported:
182190

183-
* ``PyConfig_Get()``
184-
* ``PyConfig_GetInt()``
185191
* ``PyConfig_Names()``
186192
* ``PyConfig_Set()``
187193
* ``PyInitConfig_AddModule()``

‎docs/changelog.rst

Lines changed: 1 addition & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
11
Changelog
22
=========
33

4+
* 2025-01-19: Add ``PyConfig_Get()`` functions.
45
* 2025-01-06: Add ``Py_fopen()`` and ``Py_fclose()`` functions.
56
* 2024-12-16: Add ``structmember.h`` constants:
67

‎pythoncapi_compat.h

Lines changed: 224 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -19,6 +19,7 @@ extern "C" {
1919
#endif
2020

2121
#include<Python.h>
22+
#include<stddef.h>// offsetof()
2223

2324
// Python 3.11.0b4 added PyFrame_Back() to Python.h
2425
#if PY_VERSION_HEX < 0x030b00B4 && !defined(PYPY_VERSION)
@@ -1974,6 +1975,229 @@ int Py_fclose(FILE *file)
19741975
#endif
19751976

19761977

1978+
#if 0x03090000 <= PY_VERSION_HEX && PY_VERSION_HEX < 0x030E0000 && !defined(PYPY_VERSION)
1979+
staticinline PyObject*
1980+
PyConfig_Get(constchar *name)
1981+
{
1982+
typedefenum {
1983+
_PyConfig_MEMBER_INT,
1984+
_PyConfig_MEMBER_UINT,
1985+
_PyConfig_MEMBER_ULONG,
1986+
_PyConfig_MEMBER_BOOL,
1987+
_PyConfig_MEMBER_WSTR,
1988+
_PyConfig_MEMBER_WSTR_OPT,
1989+
_PyConfig_MEMBER_WSTR_LIST,
1990+
} PyConfigMemberType;
1991+
1992+
typedefstruct {
1993+
constchar *name;
1994+
size_t offset;
1995+
PyConfigMemberType type;
1996+
constchar *sys_attr;
1997+
} PyConfigSpec;
1998+
1999+
#definePYTHONCAPI_COMPAT_SPEC(MEMBER, TYPE, sys_attr) \
2000+
{#MEMBER,offsetof(PyConfig, MEMBER), \
2001+
_PyConfig_MEMBER_##TYPE, sys_attr}
2002+
2003+
staticconst PyConfigSpec config_spec[] = {
2004+
PYTHONCAPI_COMPAT_SPEC(argv, WSTR_LIST,"argv"),
2005+
PYTHONCAPI_COMPAT_SPEC(base_exec_prefix, WSTR_OPT,"base_exec_prefix"),
2006+
PYTHONCAPI_COMPAT_SPEC(base_executable, WSTR_OPT,"_base_executable"),
2007+
PYTHONCAPI_COMPAT_SPEC(base_prefix, WSTR_OPT,"base_prefix"),
2008+
PYTHONCAPI_COMPAT_SPEC(bytes_warning, UINT, _Py_NULL),
2009+
PYTHONCAPI_COMPAT_SPEC(exec_prefix, WSTR_OPT,"exec_prefix"),
2010+
PYTHONCAPI_COMPAT_SPEC(executable, WSTR_OPT,"executable"),
2011+
PYTHONCAPI_COMPAT_SPEC(inspect, BOOL, _Py_NULL),
2012+
#if 0x030C0000 <= PY_VERSION_HEX
2013+
PYTHONCAPI_COMPAT_SPEC(int_max_str_digits, UINT, _Py_NULL),
2014+
#endif
2015+
PYTHONCAPI_COMPAT_SPEC(interactive, BOOL, _Py_NULL),
2016+
PYTHONCAPI_COMPAT_SPEC(module_search_paths, WSTR_LIST,"path"),
2017+
PYTHONCAPI_COMPAT_SPEC(optimization_level, UINT, _Py_NULL),
2018+
PYTHONCAPI_COMPAT_SPEC(parser_debug, BOOL, _Py_NULL),
2019+
PYTHONCAPI_COMPAT_SPEC(platlibdir, WSTR,"platlibdir"),
2020+
PYTHONCAPI_COMPAT_SPEC(prefix, WSTR_OPT,"prefix"),
2021+
PYTHONCAPI_COMPAT_SPEC(pycache_prefix, WSTR_OPT,"pycache_prefix"),
2022+
PYTHONCAPI_COMPAT_SPEC(quiet, BOOL, _Py_NULL),
2023+
#if 0x030B0000 <= PY_VERSION_HEX
2024+
PYTHONCAPI_COMPAT_SPEC(stdlib_dir, WSTR_OPT,"_stdlib_dir"),
2025+
#endif
2026+
PYTHONCAPI_COMPAT_SPEC(use_environment, BOOL, _Py_NULL),
2027+
PYTHONCAPI_COMPAT_SPEC(verbose, UINT, _Py_NULL),
2028+
PYTHONCAPI_COMPAT_SPEC(warnoptions, WSTR_LIST,"warnoptions"),
2029+
PYTHONCAPI_COMPAT_SPEC(write_bytecode, BOOL, _Py_NULL),
2030+
PYTHONCAPI_COMPAT_SPEC(xoptions, WSTR_LIST,"_xoptions"),
2031+
PYTHONCAPI_COMPAT_SPEC(buffered_stdio, BOOL, _Py_NULL),
2032+
PYTHONCAPI_COMPAT_SPEC(check_hash_pycs_mode, WSTR, _Py_NULL),
2033+
#if 0x030B0000 <= PY_VERSION_HEX
2034+
PYTHONCAPI_COMPAT_SPEC(code_debug_ranges, BOOL, _Py_NULL),
2035+
#endif
2036+
PYTHONCAPI_COMPAT_SPEC(configure_c_stdio, BOOL, _Py_NULL),
2037+
#if 0x030D0000 <= PY_VERSION_HEX
2038+
PYTHONCAPI_COMPAT_SPEC(cpu_count, INT, _Py_NULL),
2039+
#endif
2040+
PYTHONCAPI_COMPAT_SPEC(dev_mode, BOOL, _Py_NULL),
2041+
PYTHONCAPI_COMPAT_SPEC(dump_refs, BOOL, _Py_NULL),
2042+
#if 0x030B0000 <= PY_VERSION_HEX
2043+
PYTHONCAPI_COMPAT_SPEC(dump_refs_file, WSTR_OPT, _Py_NULL),
2044+
#endif
2045+
#ifdef Py_GIL_DISABLED
2046+
PYTHONCAPI_COMPAT_SPEC(enable_gil, INT, _Py_NULL),
2047+
#endif
2048+
PYTHONCAPI_COMPAT_SPEC(faulthandler, BOOL, _Py_NULL),
2049+
PYTHONCAPI_COMPAT_SPEC(filesystem_encoding, WSTR, _Py_NULL),
2050+
PYTHONCAPI_COMPAT_SPEC(filesystem_errors, WSTR, _Py_NULL),
2051+
PYTHONCAPI_COMPAT_SPEC(hash_seed, ULONG, _Py_NULL),
2052+
PYTHONCAPI_COMPAT_SPEC(home, WSTR_OPT, _Py_NULL),
2053+
PYTHONCAPI_COMPAT_SPEC(import_time, BOOL, _Py_NULL),
2054+
PYTHONCAPI_COMPAT_SPEC(install_signal_handlers, BOOL, _Py_NULL),
2055+
PYTHONCAPI_COMPAT_SPEC(isolated, BOOL, _Py_NULL),
2056+
#ifdef MS_WINDOWS
2057+
PYTHONCAPI_COMPAT_SPEC(legacy_windows_stdio, BOOL, _Py_NULL),
2058+
#endif
2059+
PYTHONCAPI_COMPAT_SPEC(malloc_stats, BOOL, _Py_NULL),
2060+
#if 0x030A0000 <= PY_VERSION_HEX
2061+
PYTHONCAPI_COMPAT_SPEC(orig_argv, WSTR_LIST,"orig_argv"),
2062+
#endif
2063+
PYTHONCAPI_COMPAT_SPEC(parse_argv, BOOL, _Py_NULL),
2064+
PYTHONCAPI_COMPAT_SPEC(pathconfig_warnings, BOOL, _Py_NULL),
2065+
#if 0x030C0000 <= PY_VERSION_HEX
2066+
PYTHONCAPI_COMPAT_SPEC(perf_profiling, UINT, _Py_NULL),
2067+
#endif
2068+
PYTHONCAPI_COMPAT_SPEC(program_name, WSTR, _Py_NULL),
2069+
PYTHONCAPI_COMPAT_SPEC(run_command, WSTR_OPT, _Py_NULL),
2070+
PYTHONCAPI_COMPAT_SPEC(run_filename, WSTR_OPT, _Py_NULL),
2071+
PYTHONCAPI_COMPAT_SPEC(run_module, WSTR_OPT, _Py_NULL),
2072+
#if 0x030B0000 <= PY_VERSION_HEX
2073+
PYTHONCAPI_COMPAT_SPEC(safe_path, BOOL, _Py_NULL),
2074+
#endif
2075+
PYTHONCAPI_COMPAT_SPEC(show_ref_count, BOOL, _Py_NULL),
2076+
PYTHONCAPI_COMPAT_SPEC(site_import, BOOL, _Py_NULL),
2077+
PYTHONCAPI_COMPAT_SPEC(skip_source_first_line, BOOL, _Py_NULL),
2078+
PYTHONCAPI_COMPAT_SPEC(stdio_encoding, WSTR, _Py_NULL),
2079+
PYTHONCAPI_COMPAT_SPEC(stdio_errors, WSTR, _Py_NULL),
2080+
PYTHONCAPI_COMPAT_SPEC(tracemalloc, UINT, _Py_NULL),
2081+
#if 0x030B0000 <= PY_VERSION_HEX
2082+
PYTHONCAPI_COMPAT_SPEC(use_frozen_modules, BOOL, _Py_NULL),
2083+
#endif
2084+
PYTHONCAPI_COMPAT_SPEC(use_hash_seed, BOOL, _Py_NULL),
2085+
#if 0x030D0000 <= PY_VERSION_HEX && defined(__APPLE__)
2086+
PYTHONCAPI_COMPAT_SPEC(use_system_logger, BOOL, _Py_NULL),
2087+
#endif
2088+
PYTHONCAPI_COMPAT_SPEC(user_site_directory, BOOL, _Py_NULL),
2089+
#if 0x030A0000 <= PY_VERSION_HEX
2090+
PYTHONCAPI_COMPAT_SPEC(warn_default_encoding, BOOL, _Py_NULL),
2091+
#endif
2092+
};
2093+
2094+
#undef PYTHONCAPI_COMPAT_SPEC
2095+
2096+
const PyConfigSpec *spec;
2097+
int found =0;
2098+
for (size_t i=0; i <Py_ARRAY_LENGTH(config_spec); i++) {
2099+
spec = &config_spec[i];
2100+
if (strcmp(spec->name, name) ==0) {
2101+
found =1;
2102+
break;
2103+
}
2104+
}
2105+
if (found) {
2106+
if (spec->sys_attr !=NULL) {
2107+
PyObject *value =PySys_GetObject(spec->sys_attr);
2108+
if (value ==NULL) {
2109+
PyErr_Format(PyExc_RuntimeError,"lost sys.%s", spec->sys_attr);
2110+
returnNULL;
2111+
}
2112+
returnPy_NewRef(value);
2113+
}
2114+
2115+
externconst PyConfig*_Py_GetConfig(void);
2116+
const PyConfig *config =_Py_GetConfig();
2117+
void *member = (char *)config + spec->offset;
2118+
switch (spec->type) {
2119+
case _PyConfig_MEMBER_INT:
2120+
case _PyConfig_MEMBER_UINT:
2121+
{
2122+
int value = *(int *)member;
2123+
returnPyLong_FromLong(value);
2124+
}
2125+
case _PyConfig_MEMBER_BOOL:
2126+
{
2127+
int value = *(int *)member;
2128+
returnPyBool_FromLong(value !=0);
2129+
}
2130+
case _PyConfig_MEMBER_ULONG:
2131+
{
2132+
unsignedlong value = *(unsignedlong *)member;
2133+
returnPyLong_FromUnsignedLong(value);
2134+
}
2135+
case _PyConfig_MEMBER_WSTR:
2136+
case _PyConfig_MEMBER_WSTR_OPT:
2137+
{
2138+
wchar_t *wstr = *(wchar_t **)member;
2139+
if (wstr !=NULL) {
2140+
returnPyUnicode_FromWideChar(wstr, -1);
2141+
}
2142+
else {
2143+
returnPy_NewRef(Py_None);
2144+
}
2145+
}
2146+
case _PyConfig_MEMBER_WSTR_LIST:
2147+
{
2148+
const PyWideStringList *list = (const PyWideStringList *)member;
2149+
PyObject *tuple =PyTuple_New(list->length);
2150+
if (tuple ==NULL) {
2151+
returnNULL;
2152+
}
2153+
2154+
for (Py_ssize_t i =0; i < list->length; i++) {
2155+
PyObject *item =PyUnicode_FromWideChar(list->items[i], -1);
2156+
if (item ==NULL) {
2157+
Py_DECREF(tuple);
2158+
returnNULL;
2159+
}
2160+
PyTuple_SET_ITEM(tuple, i, item);
2161+
}
2162+
return tuple;
2163+
}
2164+
default:
2165+
Py_UNREACHABLE();
2166+
}
2167+
}
2168+
2169+
PyErr_Format(PyExc_ValueError,"unknown config option name: %s", name);
2170+
returnNULL;
2171+
}
2172+
2173+
staticinlineint
2174+
PyConfig_GetInt(constchar *name,int *value)
2175+
{
2176+
PyObject *obj =PyConfig_Get(name);
2177+
if (obj ==NULL) {
2178+
return -1;
2179+
}
2180+
2181+
if (!PyLong_Check(obj)) {
2182+
Py_DECREF(obj);
2183+
PyErr_Format(PyExc_TypeError,"config option %s is not an int", name);
2184+
return -1;
2185+
}
2186+
2187+
int as_int =PyLong_AsInt(obj);
2188+
Py_DECREF(obj);
2189+
if (as_int == -1 &&PyErr_Occurred()) {
2190+
PyErr_Format(PyExc_OverflowError,
2191+
"config option %s value does not fit into a C int", name);
2192+
return -1;
2193+
}
2194+
2195+
*value = as_int;
2196+
return0;
2197+
}
2198+
#endif// PY_VERSION_HEX > 0x03090000 && !defined(PYPY_VERSION)
2199+
2200+
19772201
#ifdef __cplusplus
19782202
}
19792203
#endif

‎tests/test_pythoncapi_compat_cext.c

Lines changed: 63 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -2112,6 +2112,66 @@ test_file(PyObject *Py_UNUSED(module), PyObject *Py_UNUSED(args))
21122112
}
21132113

21142114

2115+
#if0x03090000 <=PY_VERSION_HEX&& !defined(PYPY_VERSION)
2116+
staticPyObject*
2117+
test_config(PyObject*Py_UNUSED(module),PyObject*Py_UNUSED(args))
2118+
{
2119+
// Test PyConfig_Get()
2120+
PyObject*sys=PyImport_ImportModule("sys");
2121+
if (sys==_Py_NULL) {
2122+
return_Py_NULL;
2123+
}
2124+
2125+
PyObject*obj=PyConfig_Get("argv");
2126+
PyObject*sys_attr=PyObject_GetAttrString(sys,"argv");
2127+
assert(obj==sys_attr);
2128+
Py_DECREF(obj);
2129+
Py_DECREF(sys_attr);
2130+
2131+
obj=PyConfig_Get("module_search_paths");
2132+
sys_attr=PyObject_GetAttrString(sys,"path");
2133+
assert(obj==sys_attr);
2134+
Py_DECREF(obj);
2135+
Py_DECREF(sys_attr);
2136+
2137+
obj=PyConfig_Get("xoptions");
2138+
sys_attr=PyObject_GetAttrString(sys,"_xoptions");
2139+
assert(obj==sys_attr);
2140+
Py_DECREF(obj);
2141+
Py_DECREF(sys_attr);
2142+
2143+
obj=PyConfig_Get("use_environment");
2144+
assert(PyBool_Check(obj));
2145+
Py_DECREF(obj);
2146+
2147+
obj=PyConfig_Get("verbose");
2148+
assert(PyLong_Check(obj));
2149+
Py_DECREF(obj);
2150+
2151+
assert(PyConfig_Get("nonexistent")==NULL);
2152+
assert(PyErr_ExceptionMatches(PyExc_ValueError));
2153+
PyErr_Clear();
2154+
2155+
// Test PyConfig_GetInt()
2156+
intvalue=-3;
2157+
2158+
assert(PyConfig_GetInt("verbose",&value)==0);
2159+
assert(value >=0);
2160+
2161+
assert(PyConfig_GetInt("argv",&value)==-1);
2162+
assert(PyErr_ExceptionMatches(PyExc_TypeError));
2163+
PyErr_Clear();
2164+
2165+
assert(PyConfig_GetInt("nonexistent",&value)==-1);
2166+
assert(PyErr_ExceptionMatches(PyExc_ValueError));
2167+
PyErr_Clear();
2168+
2169+
Py_DECREF(sys);
2170+
Py_RETURN_NONE;
2171+
}
2172+
#endif
2173+
2174+
21152175
staticstructPyMethodDefmethods[]= {
21162176
{"test_object",test_object,METH_NOARGS,_Py_NULL},
21172177
{"test_py_is",test_py_is,METH_NOARGS,_Py_NULL},
@@ -2160,6 +2220,9 @@ static struct PyMethodDef methods[] = {
21602220
{"test_long_stdint",test_long_stdint,METH_NOARGS,_Py_NULL},
21612221
{"test_structmember",test_structmember,METH_NOARGS,_Py_NULL},
21622222
{"test_file",test_file,METH_NOARGS,_Py_NULL},
2223+
#if0x03090000 <=PY_VERSION_HEX&& !defined(PYPY_VERSION)
2224+
{"test_config",test_config,METH_NOARGS,_Py_NULL},
2225+
#endif
21632226
{_Py_NULL,_Py_NULL,0,_Py_NULL}
21642227
};
21652228

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