diff options
Diffstat (limited to 'Python')
| -rw-r--r-- | Python/sysmodule.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/Python/sysmodule.c b/Python/sysmodule.c index 77b120f..4c87d54 100644 --- a/Python/sysmodule.c +++ b/Python/sysmodule.c @@ -570,6 +570,57 @@ sys_setrecursionlimit(PyObject *self, PyObject *args) return Py_None; } +static PyTypeObject Hash_InfoType; + +PyDoc_STRVAR(hash_info_doc, +"hash_info\n\ +\n\ +A struct sequence providing parameters used for computing\n\ +numeric hashes. The attributes are read only."); + +static PyStructSequence_Field hash_info_fields[] = { + {"width", "width of the type used for hashing, in bits"}, + {"modulus", "prime number giving the modulus on which the hash " + "function is based"}, + {"inf", "value to be used for hash of a positive infinity"}, + {"nan", "value to be used for hash of a nan"}, + {"imag", "multiplier used for the imaginary part of a complex number"}, + {NULL, NULL} +}; + +static PyStructSequence_Desc hash_info_desc = { + "sys.hash_info", + hash_info_doc, + hash_info_fields, + 5, +}; + +PyObject * +get_hash_info(void) +{ + PyObject *hash_info; + int field = 0; + hash_info = PyStructSequence_New(&Hash_InfoType); + if (hash_info == NULL) + return NULL; + PyStructSequence_SET_ITEM(hash_info, field++, + PyLong_FromLong(8*sizeof(long))); + PyStructSequence_SET_ITEM(hash_info, field++, + PyLong_FromLong(_PyHASH_MODULUS)); + PyStructSequence_SET_ITEM(hash_info, field++, + PyLong_FromLong(_PyHASH_INF)); + PyStructSequence_SET_ITEM(hash_info, field++, + PyLong_FromLong(_PyHASH_NAN)); + PyStructSequence_SET_ITEM(hash_info, field++, + PyLong_FromLong(_PyHASH_IMAG)); + if (PyErr_Occurred()) { + Py_CLEAR(hash_info); + return NULL; + } + return hash_info; +} + + PyDoc_STRVAR(setrecursionlimit_doc, "setrecursionlimit(n)\n\ \n\ @@ -1482,6 +1533,11 @@ _PySys_Init(void) PyFloat_GetInfo()); SET_SYS_FROM_STRING("int_info", PyLong_GetInfo()); + /* initialize hash_info */ + if (Hash_InfoType.tp_name == 0) + PyStructSequence_InitType(&Hash_InfoType, &hash_info_desc); + SET_SYS_FROM_STRING("hash_info", + get_hash_info()); SET_SYS_FROM_STRING("maxunicode", PyLong_FromLong(PyUnicode_GetMax())); SET_SYS_FROM_STRING("builtin_module_names", |