Mercurial > cpython-lru_cache-weakref

annotate Doc/c-api/objbuffer.rst @ 44825:ef859cd754a7 legacy-trunk

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Fixed a wrong assumption in configure.in and Include/pyport.h. The is finite function is not called isfinite() but finite(). Sorry, my fault. :)
author Christian Heimes <christian@cheimes.de>
date Sun, 20 Jan 2008 14:28:28 +0000
parents 13dc65fe8599
children 853af5bbb497
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1 .. highlightlang:: c
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3 .. _abstract-buffer:
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5 Buffer Protocol
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6 ===============
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9 .. cfunction:: int PyObject_AsCharBuffer(PyObject *obj, const char **buffer, Py_ssize_t *buffer_len)
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11 Returns a pointer to a read-only memory location useable as character- based
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12 input. The *obj* argument must support the single-segment character buffer
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13 interface. On success, returns ``0``, sets *buffer* to the memory location and
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14 *buffer_len* to the buffer length. Returns ``-1`` and sets a :exc:`TypeError`
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15 on error.
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17 .. versionadded:: 1.6
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20 .. cfunction:: int PyObject_AsReadBuffer(PyObject *obj, const void **buffer, Py_ssize_t *buffer_len)
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22 Returns a pointer to a read-only memory location containing arbitrary data. The
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23 *obj* argument must support the single-segment readable buffer interface. On
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24 success, returns ``0``, sets *buffer* to the memory location and *buffer_len* to
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25 the buffer length. Returns ``-1`` and sets a :exc:`TypeError` on error.
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27 .. versionadded:: 1.6
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30 .. cfunction:: int PyObject_CheckReadBuffer(PyObject *o)
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32 Returns ``1`` if *o* supports the single-segment readable buffer interface.
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33 Otherwise returns ``0``.
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35 .. versionadded:: 2.2
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38 .. cfunction:: int PyObject_AsWriteBuffer(PyObject *obj, void **buffer, Py_ssize_t *buffer_len)
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40 Returns a pointer to a writeable memory location. The *obj* argument must
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41 support the single-segment, character buffer interface. On success, returns
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42 ``0``, sets *buffer* to the memory location and *buffer_len* to the buffer
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43 length. Returns ``-1`` and sets a :exc:`TypeError` on error.
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45 .. versionadded:: 1.6
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