mirror of https://github.com/python/cpython
86 lines
2.2 KiB
ReStructuredText
86 lines
2.2 KiB
ReStructuredText
.. highlight:: c
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.. _bytearrayobjects:
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Byte Array Objects
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------------------
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.. index:: pair: object; bytearray
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.. c:type:: PyByteArrayObject
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This subtype of :c:type:`PyObject` represents a Python bytearray object.
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.. c:var:: PyTypeObject PyByteArray_Type
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This instance of :c:type:`PyTypeObject` represents the Python bytearray type;
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it is the same object as :class:`bytearray` in the Python layer.
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Type check macros
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^^^^^^^^^^^^^^^^^
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.. c:function:: int PyByteArray_Check(PyObject *o)
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Return true if the object *o* is a bytearray object or an instance of a
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subtype of the bytearray type. This function always succeeds.
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.. c:function:: int PyByteArray_CheckExact(PyObject *o)
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Return true if the object *o* is a bytearray object, but not an instance of a
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subtype of the bytearray type. This function always succeeds.
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Direct API functions
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^^^^^^^^^^^^^^^^^^^^
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.. c:function:: PyObject* PyByteArray_FromObject(PyObject *o)
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Return a new bytearray object from any object, *o*, that implements the
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:ref:`buffer protocol <bufferobjects>`.
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.. c:function:: PyObject* PyByteArray_FromStringAndSize(const char *string, Py_ssize_t len)
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Create a new bytearray object from *string* and its length, *len*. On
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failure, ``NULL`` is returned.
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.. c:function:: PyObject* PyByteArray_Concat(PyObject *a, PyObject *b)
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Concat bytearrays *a* and *b* and return a new bytearray with the result.
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.. c:function:: Py_ssize_t PyByteArray_Size(PyObject *bytearray)
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Return the size of *bytearray* after checking for a ``NULL`` pointer.
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.. c:function:: char* PyByteArray_AsString(PyObject *bytearray)
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Return the contents of *bytearray* as a char array after checking for a
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``NULL`` pointer. The returned array always has an extra
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null byte appended.
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.. c:function:: int PyByteArray_Resize(PyObject *bytearray, Py_ssize_t len)
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Resize the internal buffer of *bytearray* to *len*.
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Macros
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^^^^^^
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These macros trade safety for speed and they don't check pointers.
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.. c:function:: char* PyByteArray_AS_STRING(PyObject *bytearray)
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Similar to :c:func:`PyByteArray_AsString`, but without error checking.
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.. c:function:: Py_ssize_t PyByteArray_GET_SIZE(PyObject *bytearray)
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Similar to :c:func:`PyByteArray_Size`, but without error checking.
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