Edit File: long.txt
.. highlightlang:: c .. _longobjects: Long Integer Objects -------------------- .. index:: object: long integer .. ctype:: PyLongObject This subtype of :ctype:`PyObject` represents a Python long integer object. .. cvar:: PyTypeObject PyLong_Type .. index:: single: LongType (in modules types) This instance of :ctype:`PyTypeObject` represents the Python long integer type. This is the same object as ``long`` and ``types.LongType``. .. cfunction:: int PyLong_Check(PyObject *p) Return true if its argument is a :ctype:`PyLongObject` or a subtype of :ctype:`PyLongObject`. .. versionchanged:: 2.2 Allowed subtypes to be accepted. .. cfunction:: int PyLong_CheckExact(PyObject *p) Return true if its argument is a :ctype:`PyLongObject`, but not a subtype of :ctype:`PyLongObject`. .. versionadded:: 2.2 .. cfunction:: PyObject* PyLong_FromLong(long v) Return a new :ctype:`PyLongObject` object from *v*, or *NULL* on failure. .. cfunction:: PyObject* PyLong_FromUnsignedLong(unsigned long v) Return a new :ctype:`PyLongObject` object from a C :ctype:`unsigned long`, or *NULL* on failure. .. cfunction:: PyObject* PyLong_FromSsize_t(Py_ssize_t v) Return a new :ctype:`PyLongObject` object from a C :ctype:`Py_ssize_t`, or *NULL* on failure. .. versionadded:: 2.6 .. cfunction:: PyObject* PyLong_FromSize_t(size_t v) Return a new :ctype:`PyLongObject` object from a C :ctype:`size_t`, or *NULL* on failure. .. versionadded:: 2.6 .. cfunction:: PyObject* PyLong_FromLongLong(PY_LONG_LONG v) Return a new :ctype:`PyLongObject` object from a C :ctype:`long long`, or *NULL* on failure. .. cfunction:: PyObject* PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG v) Return a new :ctype:`PyLongObject` object from a C :ctype:`unsigned long long`, or *NULL* on failure. .. cfunction:: PyObject* PyLong_FromDouble(double v) Return a new :ctype:`PyLongObject` object from the integer part of *v*, or *NULL* on failure. .. cfunction:: PyObject* PyLong_FromString(char *str, char **pend, int base) Return a new :ctype:`PyLongObject` based on the string value in *str*, which is interpreted according to the radix in *base*. If *pend* is non-*NULL*, ``*pend`` will point to the first character in *str* which follows the representation of the number. If *base* is ``0``, the radix will be determined based on the leading characters of *str*: if *str* starts with ``'0x'`` or ``'0X'``, radix 16 will be used; if *str* starts with ``'0'``, radix 8 will be used; otherwise radix 10 will be used. If *base* is not ``0``, it must be between ``2`` and ``36``, inclusive. Leading spaces are ignored. If there are no digits, :exc:`ValueError` will be raised. .. cfunction:: PyObject* PyLong_FromUnicode(Py_UNICODE *u, Py_ssize_t length, int base) Convert a sequence of Unicode digits to a Python long integer value. The first parameter, *u*, points to the first character of the Unicode string, *length* gives the number of characters, and *base* is the radix for the conversion. The radix must be in the range [2, 36]; if it is out of range, :exc:`ValueError` will be raised. .. versionadded:: 1.6 .. versionchanged:: 2.5 This function used an :ctype:`int` for *length*. This might require changes in your code for properly supporting 64-bit systems. .. cfunction:: PyObject* PyLong_FromVoidPtr(void *p) Create a Python integer or long integer from the pointer *p*. The pointer value can be retrieved from the resulting value using :cfunc:`PyLong_AsVoidPtr`. .. versionadded:: 1.5.2 .. versionchanged:: 2.5 If the integer is larger than LONG_MAX, a positive long integer is returned. .. cfunction:: long PyLong_AsLong(PyObject *pylong) .. index:: single: LONG_MAX single: OverflowError (built-in exception) Return a C :ctype:`long` representation of the contents of *pylong*. If *pylong* is greater than :const:`LONG_MAX`, an :exc:`OverflowError` is raised and ``-1`` will be returned. .. cfunction:: Py_ssize_t PyLong_AsSsize_t(PyObject *pylong) .. index:: single: PY_SSIZE_T_MAX single: OverflowError (built-in exception) Return a C :ctype:`Py_ssize_t` representation of the contents of *pylong*. If *pylong* is greater than :const:`PY_SSIZE_T_MAX`, an :exc:`OverflowError` is raised and ``-1`` will be returned. .. versionadded:: 2.6 .. cfunction:: unsigned long PyLong_AsUnsignedLong(PyObject *pylong) .. index:: single: ULONG_MAX single: OverflowError (built-in exception) Return a C :ctype:`unsigned long` representation of the contents of *pylong*. If *pylong* is greater than :const:`ULONG_MAX`, an :exc:`OverflowError` is raised. .. cfunction:: PY_LONG_LONG PyLong_AsLongLong(PyObject *pylong) Return a C :ctype:`long long` from a Python long integer. If *pylong* cannot be represented as a :ctype:`long long`, an :exc:`OverflowError` will be raised. .. versionadded:: 2.2 .. cfunction:: unsigned PY_LONG_LONG PyLong_AsUnsignedLongLong(PyObject *pylong) Return a C :ctype:`unsigned long long` from a Python long integer. If *pylong* cannot be represented as an :ctype:`unsigned long long`, an :exc:`OverflowError` will be raised if the value is positive, or a :exc:`TypeError` will be raised if the value is negative. .. versionadded:: 2.2 .. cfunction:: unsigned long PyLong_AsUnsignedLongMask(PyObject *io) Return a C :ctype:`unsigned long` from a Python long integer, without checking for overflow. .. versionadded:: 2.3 .. cfunction:: unsigned PY_LONG_LONG PyLong_AsUnsignedLongLongMask(PyObject *io) Return a C :ctype:`unsigned long long` from a Python long integer, without checking for overflow. .. versionadded:: 2.3 .. cfunction:: double PyLong_AsDouble(PyObject *pylong) Return a C :ctype:`double` representation of the contents of *pylong*. If *pylong* cannot be approximately represented as a :ctype:`double`, an :exc:`OverflowError` exception is raised and ``-1.0`` will be returned. .. cfunction:: void* PyLong_AsVoidPtr(PyObject *pylong) Convert a Python integer or long integer *pylong* to a C :ctype:`void` pointer. If *pylong* cannot be converted, an :exc:`OverflowError` will be raised. This is only assured to produce a usable :ctype:`void` pointer for values created with :cfunc:`PyLong_FromVoidPtr`. .. versionadded:: 1.5.2 .. versionchanged:: 2.5 For values outside 0..LONG_MAX, both signed and unsigned integers are accepted.
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