251 lines
7.7 KiB
ReStructuredText
251 lines
7.7 KiB
ReStructuredText
.. 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:: long PyLong_AsLongAndOverflow(PyObject *pylong, int *overflow)
|
|
|
|
Return a C :ctype:`long` representation of the contents of
|
|
*pylong*. If *pylong* is greater than :const:`LONG_MAX` or less
|
|
than :const:`LONG_MIN`, set *\*overflow* to ``1`` or ``-1``,
|
|
respectively, and return ``-1``; otherwise, set *\*overflow* to
|
|
``0``. If any other exception occurs (for example a TypeError or
|
|
MemoryError), then ``-1`` will be returned and *\*overflow* will
|
|
be ``0``.
|
|
|
|
.. versionadded:: 2.7
|
|
|
|
|
|
.. cfunction:: PY_LONG_LONG PyLong_AsLongLongAndOverflow(PyObject *pylong, int *overflow)
|
|
|
|
Return a C :ctype:`long long` representation of the contents of
|
|
*pylong*. If *pylong* is greater than :const:`PY_LLONG_MAX` or less
|
|
than :const:`PY_LLONG_MIN`, set *\*overflow* to ``1`` or ``-1``,
|
|
respectively, and return ``-1``; otherwise, set *\*overflow* to
|
|
``0``. If any other exception occurs (for example a TypeError or
|
|
MemoryError), then ``-1`` will be returned and *\*overflow* will
|
|
be ``0``.
|
|
|
|
.. versionadded:: 2.7
|
|
|
|
|
|
.. 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)
|
|
|
|
.. index::
|
|
single: OverflowError (built-in exception)
|
|
|
|
Return a C :ctype:`long long` from a Python long integer. If
|
|
*pylong* cannot be represented as a :ctype:`long long`, an
|
|
:exc:`OverflowError` is raised and ``-1`` is returned.
|
|
|
|
.. versionadded:: 2.2
|
|
|
|
|
|
.. cfunction:: unsigned PY_LONG_LONG PyLong_AsUnsignedLongLong(PyObject *pylong)
|
|
|
|
.. index::
|
|
single: OverflowError (built-in exception)
|
|
|
|
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` is raised and ``(unsigned long long)-1`` is
|
|
returned.
|
|
|
|
.. versionadded:: 2.2
|
|
|
|
.. versionchanged:: 2.7
|
|
A negative *pylong* now raises :exc:`OverflowError`, not
|
|
:exc:`TypeError`.
|
|
|
|
|
|
.. 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.
|
|
|
|
|