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Eric Snow's implementation of PEP 421.

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Issue 14673: Add sys.implementation
This commit is contained in:
Barry Warsaw 2012-06-03 16:18:47 -04:00
parent 82ffabdfa4
commit 409da157d7
11 changed files with 541 additions and 3 deletions
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72
Python/sysmodule.c
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@ -1261,6 +1261,7 @@ executable -- absolute path of the executable binary of the Python interpreter\n
float_info -- a struct sequence with information about the float implementation.\n\
float_repr_style -- string indicating the style of repr() output for floats\n\
hexversion -- version information encoded as a single integer\n\
implementation -- Python implementation information.\n\
int_info -- a struct sequence with information about the int implementation.\n\
maxsize -- the largest supported length of containers.\n\
maxunicode -- the value of the largest Unicode codepoint\n\
@ -1454,6 +1455,69 @@ make_version_info(void)
return version_info;
}
static PyObject *
make_impl_info(PyObject *version_info)
{
int res;
PyObject *impl_info, *value, *ns;
impl_info = PyDict_New();
if (impl_info == NULL)
return NULL;
/* populate the dict */
#define NAME "cpython"
#define QUOTE(arg) #arg
#define STRIFY(name) QUOTE(name)
#define MAJOR STRIFY(PY_MAJOR_VERSION)
#define MINOR STRIFY(PY_MINOR_VERSION)
#define TAG NAME "-" MAJOR MINOR
value = PyUnicode_FromString(NAME);
if (value == NULL)
goto error;
res = PyDict_SetItemString(impl_info, "name", value);
Py_DECREF(value);
if (res < 0)
goto error;
value = PyUnicode_FromString(TAG);
if (value == NULL)
goto error;
res = PyDict_SetItemString(impl_info, "cache_tag", value);
Py_DECREF(value);
if (res < 0)
goto error;
#undef NAME
#undef QUOTE
#undef STRIFY
#undef MAJOR
#undef MINOR
#undef TAG
res = PyDict_SetItemString(impl_info, "version", version_info);
if (res < 0)
goto error;
value = PyLong_FromLong(PY_VERSION_HEX);
if (value == NULL)
goto error;
res = PyDict_SetItemString(impl_info, "hexversion", value);
Py_DECREF(value);
if (res < 0)
goto error;
/* dict ready */
ns = _PyNamespace_New(impl_info);
Py_DECREF(impl_info);
return ns;
error:
Py_CLEAR(impl_info);
return NULL;
}
static struct PyModuleDef sysmodule = {
PyModuleDef_HEAD_INIT,
"sys",
@ -1469,7 +1533,7 @@ static struct PyModuleDef sysmodule = {
PyObject *
_PySys_Init(void)
{
PyObject *m, *v, *sysdict;
PyObject *m, *v, *sysdict, *version_info;
char *s;
m = PyModule_Create(&sysmodule);
@ -1589,11 +1653,15 @@ _PySys_Init(void)
/* version_info */
if (VersionInfoType.tp_name == 0)
PyStructSequence_InitType(&VersionInfoType, &version_info_desc);
SET_SYS_FROM_STRING("version_info", make_version_info());
version_info = make_version_info();
SET_SYS_FROM_STRING("version_info", version_info);
/* prevent user from creating new instances */
VersionInfoType.tp_init = NULL;
VersionInfoType.tp_new = NULL;
/* implementation */
SET_SYS_FROM_STRING("implementation", make_impl_info(version_info));
/* flags */
if (FlagsType.tp_name == 0)
PyStructSequence_InitType(&FlagsType, &flags_desc);