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バージョン 3.0 で撤廃.
</
span
>
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p
>
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div
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<
p
>
これらの関数は、 Python 2 の「古いバッファプロトコル」 API の一部です。 Python 3 では、もうこのプロトコルは存在しませんが、 2.x のコードを移植しやすいように関数は公開されています。
<
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class
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std std-ref
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>
新しいバッファプロトコル
</
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>
</
a
>
と互換性のあるラッパー関数のように振る舞いますが、バッファがエクスポートされるときに取得されるリソースの生存期間を管理することはできません。
</
p
>
<
p
>
従って、あるオブジェクトのバッファビューを取得するために、
<
a
class
="
reference internal
"
href
="
buffer.html#c.PyObject_GetBuffer
"
title
="
PyObject_GetBuffer
"
>
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code
class
="
xref c c-func docutils literal
"
>
<
span
class
="
pre
"
>
PyObject_GetBuffer()
</
span
>
</
code
>
</
a
>
(もしくは
<
code
class
="
docutils literal
"
>
<
span
class
="
pre
"
>
y*
</
span
>
</
code
>
および
<
code
class
="
docutils literal
"
>
<
span
class
="
pre
"
>
w*
</
span
>
</
code
>
<
a
class
="
reference internal
"
href
="
arg.html#arg-parsing
"
>
<
span
class
="
std std-ref
"
>
フォーマットコード
</
span
>
</
a
>
で
<
a
class
="
reference internal
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href
="
arg.html#c.PyArg_ParseTuple
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title
="
PyArg_ParseTuple
"
>
<
code
class
="
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"
>
<
span
class
="
pre
"
>
PyArg_ParseTuple()
</
span
>
</
code
>
</
a
>
やその仲間) を呼び出し、バッファビューを解放するときには
<
a
class
="
reference internal
"
href
="
buffer.html#c.PyBuffer_Release
"
title
="
PyBuffer_Release
"
>
<
code
class
="
xref c c-func docutils literal
"
>
<
span
class
="
pre
"
>
PyBuffer_Release()
</
span
>
</
code
>
</
a
>
を呼び出します。
</
p
>
<
dl
class
="
function
"
>
<
dt
id
="
c.PyObject_AsCharBuffer
"
>
int
<
code
class
="
descname
"
>
PyObject_AsCharBuffer
</
code
>
<
span
class
="
sig-paren
"
>
(
</
span
>
<
a
class
="
reference internal
"
href
="
structures.html#c.PyObject
"
title
="
PyObject
"
>
PyObject
</
a
>
<
em
>
*obj
</
em
>
, const char
<
em
>
**buffer
</
em
>
, Py_ssize_t
<
em
>
*buffer_len
</
em
>
<
span
class
="
sig-paren
"
>
)
</
span
>
<
a
class
="
headerlink
"
href
="
#c.PyObject_AsCharBuffer
"
title
="
この定義へのパーマリンク
"
>
¶
</
a
>
</
dt
>
<
dd
>
<
p
>
文字ベースの入力として使える読み出し専用メモリ上の位置へのポインタを返します。
<
em
>
obj
</
em
>
引数は単一セグメントからなる文字バッファインタフェースをサポートしていなければなりません。成功すると
<
code
class
="
docutils literal
"
>
<
span
class
="
pre
"
>
0
</
span
>
</
code
>
を返し、
<
em
>
buffer
</
em
>
をメモリの位置に、
<
em
>
buffer_len
</
em
>
をバッファの長さに設定します。エラーの際には
<
code
class
="
docutils literal
"
>
<
span
class
="
pre
"
>
-1
</
span
>
</
code
>
を返し、
<
a
class
="
reference internal
"
href
="
../library/exceptions.html#TypeError
"
title
="
TypeError
"
>
<
code
class
="
xref py py-exc docutils literal
"
>
<
span
class
="
pre
"
>
TypeError
</
span
>
</
code
>
</
a
>
をセットします。
</
p
>
</
dd
>
</
dl
>
<
dl
class
="
function
"
>
<
dt
id
="
c.PyObject_AsReadBuffer
"
>
int
<
code
class
="
descname
"
>
PyObject_AsReadBuffer
</
code
>
<
span
class
="
sig-paren
"
>
(
</
span
>
<
a
class
="
reference internal
"
href
="
structures.html#c.PyObject
"
title
="
PyObject
"
>
PyObject
</
a
>
<
em
>
*obj
</
em
>
, const void
<
em
>
**buffer
</
em
>
, Py_ssize_t
<
em
>
*buffer_len
</
em
>
<
span
class
="
sig-paren
"
>
)
</
span
>
<
a
class
="
headerlink
"
href
="
#c.PyObject_AsReadBuffer
"
title
="
この定義へのパーマリンク
"
>
¶
</
a
>
</
dt
>
<
dd
>
<
p
>
任意のデータを収めた読み出し専用のメモリ上の位置へのポインタを返します。
<
em
>
obj
</
em
>
引数は単一セグメントからなる読み出し可能バッファインタフェースをサポートしていなければなりません。成功すると
<
code
class
="
docutils literal
"
>
<
span
class
="
pre
"
>
0
</
span
>
</
code
>
を返し、
<
em
>
buffer
</
em
>
をメモリの位置に、
<
em
>
buffer_len
</
em
>
をバッファの長さに設定します。エラーの際には
<
code
class
="
docutils literal
"
>
<
span
class
="
pre
"
>
-1
</
span
>
</
code
>
を返し、
<
a
class
="
reference internal
"
href
="
../library/exceptions.html#TypeError
"
title
="
TypeError
"
>
<
code
class
="
xref py py-exc docutils literal
"
>
<
span
class
="
pre
"
>
TypeError
</
span
>
</
code
>
</
a
>
をセットします。
</
p
>
</
dd
>
</
dl
>
<
dl
class
="
function
"
>
<
dt
id
="
c.PyObject_CheckReadBuffer
"
>
int
<
code
class
="
descname
"
>
PyObject_CheckReadBuffer
</
code
>
<
span
class
="
sig-paren
"
>
(
</
span
>
<
a
class
="
reference internal
"
href
="
structures.html#c.PyObject
"
title
="
PyObject
"
>
PyObject
</
a
>
<
em
>
*o
</
em
>
<
span
class
="
sig-paren
"
>
)
</
span
>
<
a
class
="
headerlink
"
href
="
#c.PyObject_CheckReadBuffer
"
title
="
この定義へのパーマリンク
"
>
¶
</
a
>
</
dt
>
<
dd
>
<
p
>
<
em
>
o
</
em
>
が単一セグメントからなる読み出し可能バッファインタフェースをサポートしている場合に
<
code
class
="
docutils literal
"
>
<
span
class
="
pre
"
>
1
</
span
>
</
code
>
を返します。それ以外の場合には
<
code
class
="
docutils literal
"
>
<
span
class
="
pre
"
>
0
</
span
>
</
code
>
を返します。
</
p
>
</
dd
>
</
dl
>
<
dl
class
="
function
"
>
<
dt
id
="
c.PyObject_AsWriteBuffer
"
>
int
<
code
class
="
descname
"
>
PyObject_AsWriteBuffer
</
code
>
<
span
class
="
sig-paren
"
>
(
</
span
>
<
a
class
="
reference internal
"
href
="
structures.html#c.PyObject
"
title
="
PyObject
"
>
PyObject
</
a
>
<
em
>
*obj
</
em
>
, void
<
em
>
**buffer
</
em
>
, Py_ssize_t
<
em
>
*buffer_len
</
em
>
<
span
class
="
sig-paren
"
>
)
</
span
>
<
a
class
="
headerlink
"
href
="
#c.PyObject_AsWriteBuffer
"
title
="
この定義へのパーマリンク
"
>
¶
</
a
>
</
dt
>
<
dd
>
<
p
>
書き込み可能なメモリ上の位置へのポインタを返します。
<
em
>
obj
</
em
>
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