mirror of
https://github.com/python/cpython.git
synced 2024-11-26 19:34:19 +08:00
b70ccc348b
this branch. While I am here, also get rid of other versionchanged:: 2.x constructs, as discussed.
40 lines
1.5 KiB
ReStructuredText
40 lines
1.5 KiB
ReStructuredText
.. highlightlang:: c
|
|
|
|
.. _abstract-buffer:
|
|
|
|
Buffer Protocol
|
|
===============
|
|
|
|
|
|
.. cfunction:: int PyObject_AsCharBuffer(PyObject *obj, const char **buffer, Py_ssize_t *buffer_len)
|
|
|
|
Returns a pointer to a read-only memory location usable as character-based
|
|
input. The *obj* argument must support the single-segment character buffer
|
|
interface. On success, returns ``0``, sets *buffer* to the memory location
|
|
and *buffer_len* to the buffer length. Returns ``-1`` and sets a
|
|
:exc:`TypeError` on error.
|
|
|
|
|
|
.. cfunction:: int PyObject_AsReadBuffer(PyObject *obj, const void **buffer, Py_ssize_t *buffer_len)
|
|
|
|
Returns a pointer to a read-only memory location containing arbitrary data.
|
|
The *obj* argument must support the single-segment readable buffer
|
|
interface. On success, returns ``0``, sets *buffer* to the memory location
|
|
and *buffer_len* to the buffer length. Returns ``-1`` and sets a
|
|
:exc:`TypeError` on error.
|
|
|
|
|
|
.. cfunction:: int PyObject_CheckReadBuffer(PyObject *o)
|
|
|
|
Returns ``1`` if *o* supports the single-segment readable buffer interface.
|
|
Otherwise returns ``0``.
|
|
|
|
|
|
.. cfunction:: int PyObject_AsWriteBuffer(PyObject *obj, void **buffer, Py_ssize_t *buffer_len)
|
|
|
|
Returns a pointer to a writable memory location. The *obj* argument must
|
|
support the single-segment, character buffer interface. On success,
|
|
returns ``0``, sets *buffer* to the memory location and *buffer_len* to the
|
|
buffer length. Returns ``-1`` and sets a :exc:`TypeError` on error.
|
|
|