mirror of
https://github.com/python/cpython.git
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b1056c2a44
Co-authored-by: Kumar Aditya <kumaraditya@python.org> Co-authored-by: Victor Stinner <vstinner@python.org>
2773 lines
77 KiB
C
2773 lines
77 KiB
C
/*
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An implementation of Buffered I/O as defined by PEP 3116 - "New I/O"
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Classes defined here: BufferedIOBase, BufferedReader, BufferedWriter,
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BufferedRandom.
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Written by Amaury Forgeot d'Arc and Antoine Pitrou
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*/
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#include "Python.h"
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#include "pycore_call.h" // _PyObject_CallNoArgs()
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#include "pycore_fileutils.h" // _PyFile_Flush
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#include "pycore_object.h" // _PyObject_GC_UNTRACK()
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#include "pycore_pyerrors.h" // _Py_FatalErrorFormat()
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#include "pycore_pylifecycle.h" // _Py_IsInterpreterFinalizing()
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#include "pycore_weakref.h" // FT_CLEAR_WEAKREFS()
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#include "_iomodule.h"
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/*[clinic input]
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module _io
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class _io._BufferedIOBase "PyObject *" "clinic_state()->PyBufferedIOBase_Type"
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class _io._Buffered "buffered *" "clinic_state()->PyBufferedIOBase_Type"
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class _io.BufferedReader "buffered *" "clinic_state()->PyBufferedReader_Type"
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class _io.BufferedWriter "buffered *" "clinic_state()->PyBufferedWriter_Type"
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class _io.BufferedRWPair "rwpair *" "clinic_state()->PyBufferedRWPair_Type"
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class _io.BufferedRandom "buffered *" "clinic_state()->PyBufferedRandom_Type"
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[clinic start generated code]*/
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/*[clinic end generated code: output=da39a3ee5e6b4b0d input=3b3ef9cbbbad4590]*/
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/*
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* BufferedIOBase class, inherits from IOBase.
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*/
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PyDoc_STRVAR(bufferediobase_doc,
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"Base class for buffered IO objects.\n"
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"\n"
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"The main difference with RawIOBase is that the read() method\n"
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"supports omitting the size argument, and does not have a default\n"
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"implementation that defers to readinto().\n"
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"\n"
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"In addition, read(), readinto() and write() may raise\n"
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"BlockingIOError if the underlying raw stream is in non-blocking\n"
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"mode and not ready; unlike their raw counterparts, they will never\n"
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"return None.\n"
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"\n"
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"A typical implementation should not inherit from a RawIOBase\n"
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"implementation, but wrap one.\n"
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);
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static PyObject *
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_bufferediobase_readinto_generic(PyObject *self, Py_buffer *buffer, char readinto1)
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{
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Py_ssize_t len;
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PyObject *data;
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PyObject *attr = readinto1
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? &_Py_ID(read1)
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: &_Py_ID(read);
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data = _PyObject_CallMethod(self, attr, "n", buffer->len);
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if (data == NULL)
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return NULL;
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if (!PyBytes_Check(data)) {
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Py_DECREF(data);
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PyErr_SetString(PyExc_TypeError, "read() should return bytes");
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return NULL;
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}
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len = PyBytes_GET_SIZE(data);
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if (len > buffer->len) {
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PyErr_Format(PyExc_ValueError,
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"read() returned too much data: "
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"%zd bytes requested, %zd returned",
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buffer->len, len);
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Py_DECREF(data);
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return NULL;
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}
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memcpy(buffer->buf, PyBytes_AS_STRING(data), len);
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Py_DECREF(data);
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return PyLong_FromSsize_t(len);
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}
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/*[clinic input]
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@critical_section
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_io._BufferedIOBase.readinto
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buffer: Py_buffer(accept={rwbuffer})
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/
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[clinic start generated code]*/
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static PyObject *
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_io__BufferedIOBase_readinto_impl(PyObject *self, Py_buffer *buffer)
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/*[clinic end generated code: output=8c8cda6684af8038 input=5273d20db7f56e1a]*/
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{
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return _bufferediobase_readinto_generic(self, buffer, 0);
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}
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/*[clinic input]
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@critical_section
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_io._BufferedIOBase.readinto1
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buffer: Py_buffer(accept={rwbuffer})
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/
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[clinic start generated code]*/
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static PyObject *
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_io__BufferedIOBase_readinto1_impl(PyObject *self, Py_buffer *buffer)
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/*[clinic end generated code: output=358623e4fd2b69d3 input=d6eb723dedcee654]*/
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{
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return _bufferediobase_readinto_generic(self, buffer, 1);
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}
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static PyObject *
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bufferediobase_unsupported(_PyIO_State *state, const char *message)
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{
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PyErr_SetString(state->unsupported_operation, message);
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return NULL;
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}
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/*[clinic input]
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_io._BufferedIOBase.detach
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cls: defining_class
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/
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Disconnect this buffer from its underlying raw stream and return it.
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After the raw stream has been detached, the buffer is in an unusable
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state.
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[clinic start generated code]*/
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static PyObject *
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_io__BufferedIOBase_detach_impl(PyObject *self, PyTypeObject *cls)
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/*[clinic end generated code: output=b87b135d67cd4448 input=0b61a7b4357c1ea7]*/
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{
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_PyIO_State *state = get_io_state_by_cls(cls);
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return bufferediobase_unsupported(state, "detach");
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}
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/*[clinic input]
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_io._BufferedIOBase.read
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cls: defining_class
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size: int(unused=True) = -1
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/
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Read and return up to n bytes.
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If the size argument is omitted, None, or negative, read and
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return all data until EOF.
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If the size argument is positive, and the underlying raw stream is
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not 'interactive', multiple raw reads may be issued to satisfy
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the byte count (unless EOF is reached first).
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However, for interactive raw streams (as well as sockets and pipes),
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at most one raw read will be issued, and a short result does not
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imply that EOF is imminent.
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Return an empty bytes object on EOF.
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Return None if the underlying raw stream was open in non-blocking
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mode and no data is available at the moment.
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[clinic start generated code]*/
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static PyObject *
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_io__BufferedIOBase_read_impl(PyObject *self, PyTypeObject *cls,
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int Py_UNUSED(size))
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/*[clinic end generated code: output=aceb2765587b0a29 input=824f6f910465e61a]*/
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{
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_PyIO_State *state = get_io_state_by_cls(cls);
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return bufferediobase_unsupported(state, "read");
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}
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/*[clinic input]
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_io._BufferedIOBase.read1
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cls: defining_class
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size: int(unused=True) = -1
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/
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Read and return up to size bytes, with at most one read() call to the underlying raw stream.
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Return an empty bytes object on EOF.
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A short result does not imply that EOF is imminent.
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[clinic start generated code]*/
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static PyObject *
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_io__BufferedIOBase_read1_impl(PyObject *self, PyTypeObject *cls,
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int Py_UNUSED(size))
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/*[clinic end generated code: output=2e7fc62972487eaa input=af76380e020fd9e6]*/
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{
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_PyIO_State *state = get_io_state_by_cls(cls);
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return bufferediobase_unsupported(state, "read1");
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}
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/*[clinic input]
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_io._BufferedIOBase.write
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cls: defining_class
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b: object(unused=True)
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/
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Write buffer b to the IO stream.
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Return the number of bytes written, which is always
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the length of b in bytes.
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Raise BlockingIOError if the buffer is full and the
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underlying raw stream cannot accept more data at the moment.
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[clinic start generated code]*/
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static PyObject *
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_io__BufferedIOBase_write_impl(PyObject *self, PyTypeObject *cls,
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PyObject *Py_UNUSED(b))
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/*[clinic end generated code: output=712c635246bf2306 input=9793f5c8f71029ad]*/
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{
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_PyIO_State *state = get_io_state_by_cls(cls);
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return bufferediobase_unsupported(state, "write");
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}
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typedef struct {
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PyObject_HEAD
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PyObject *raw;
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int ok; /* Initialized? */
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int detached;
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int readable;
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int writable;
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char finalizing;
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/* True if this is a vanilla Buffered object (rather than a user derived
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class) *and* the raw stream is a vanilla FileIO object. */
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int fast_closed_checks;
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/* Absolute position inside the raw stream (-1 if unknown). */
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Py_off_t abs_pos;
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/* A static buffer of size `buffer_size` */
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char *buffer;
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/* Current logical position in the buffer. */
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Py_off_t pos;
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/* Position of the raw stream in the buffer. */
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Py_off_t raw_pos;
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/* Just after the last buffered byte in the buffer, or -1 if the buffer
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isn't ready for reading. */
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Py_off_t read_end;
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/* Just after the last byte actually written */
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Py_off_t write_pos;
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/* Just after the last byte waiting to be written, or -1 if the buffer
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isn't ready for writing. */
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Py_off_t write_end;
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PyThread_type_lock lock;
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volatile unsigned long owner;
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Py_ssize_t buffer_size;
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Py_ssize_t buffer_mask;
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PyObject *dict;
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PyObject *weakreflist;
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} buffered;
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#define buffered_CAST(op) ((buffered *)(op))
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/*
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Implementation notes:
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* BufferedReader, BufferedWriter and BufferedRandom try to share most
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methods (this is helped by the members `readable` and `writable`, which
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are initialized in the respective constructors)
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* They also share a single buffer for reading and writing. This enables
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interleaved reads and writes without flushing. It also makes the logic
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a bit trickier to get right.
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* The absolute position of the raw stream is cached, if possible, in the
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`abs_pos` member. It must be updated every time an operation is done
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on the raw stream. If not sure, it can be reinitialized by calling
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_buffered_raw_tell(), which queries the raw stream (_buffered_raw_seek()
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also does it). To read it, use RAW_TELL().
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* Three helpers, _bufferedreader_raw_read, _bufferedwriter_raw_write and
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_bufferedwriter_flush_unlocked do a lot of useful housekeeping.
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NOTE: we should try to maintain block alignment of reads and writes to the
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raw stream (according to the buffer size), but for now it is only done
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in read() and friends.
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*/
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/* These macros protect the buffered object against concurrent operations. */
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static int
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_enter_buffered_busy(buffered *self)
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{
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int relax_locking;
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PyLockStatus st;
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if (self->owner == PyThread_get_thread_ident()) {
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PyErr_Format(PyExc_RuntimeError,
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"reentrant call inside %R", self);
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return 0;
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}
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PyInterpreterState *interp = _PyInterpreterState_GET();
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relax_locking = _Py_IsInterpreterFinalizing(interp);
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Py_BEGIN_ALLOW_THREADS
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if (!relax_locking)
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st = PyThread_acquire_lock(self->lock, 1);
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else {
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/* When finalizing, we don't want a deadlock to happen with daemon
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* threads abruptly shut down while they owned the lock.
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* Therefore, only wait for a grace period (1 s.).
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* Note that non-daemon threads have already exited here, so this
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* shouldn't affect carefully written threaded I/O code.
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*/
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st = PyThread_acquire_lock_timed(self->lock, (PY_TIMEOUT_T)1e6, 0);
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}
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Py_END_ALLOW_THREADS
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if (relax_locking && st != PY_LOCK_ACQUIRED) {
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PyObject *ascii = PyObject_ASCII((PyObject*)self);
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_Py_FatalErrorFormat(__func__,
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"could not acquire lock for %s at interpreter "
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"shutdown, possibly due to daemon threads",
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ascii ? PyUnicode_AsUTF8(ascii) : "<ascii(self) failed>");
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}
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return 1;
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}
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#define ENTER_BUFFERED(self) \
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( (PyThread_acquire_lock(self->lock, 0) ? \
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1 : _enter_buffered_busy(self)) \
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&& (self->owner = PyThread_get_thread_ident(), 1) )
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#define LEAVE_BUFFERED(self) \
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do { \
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self->owner = 0; \
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PyThread_release_lock(self->lock); \
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} while(0);
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#define CHECK_INITIALIZED(self) \
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if (self->ok <= 0) { \
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if (self->detached) { \
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PyErr_SetString(PyExc_ValueError, \
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"raw stream has been detached"); \
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} else { \
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PyErr_SetString(PyExc_ValueError, \
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"I/O operation on uninitialized object"); \
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} \
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return NULL; \
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}
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#define CHECK_INITIALIZED_INT(self) \
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if (self->ok <= 0) { \
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if (self->detached) { \
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PyErr_SetString(PyExc_ValueError, \
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"raw stream has been detached"); \
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} else { \
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PyErr_SetString(PyExc_ValueError, \
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"I/O operation on uninitialized object"); \
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} \
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return -1; \
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}
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#define IS_CLOSED(self) \
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(!self->buffer || \
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(self->fast_closed_checks \
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? _PyFileIO_closed(self->raw) \
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: buffered_closed(self)))
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#define CHECK_CLOSED(self, error_msg) \
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if (IS_CLOSED(self) && (Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t) == 0)) { \
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PyErr_SetString(PyExc_ValueError, error_msg); \
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return NULL; \
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} \
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#define VALID_READ_BUFFER(self) \
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(self->readable && self->read_end != -1)
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#define VALID_WRITE_BUFFER(self) \
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(self->writable && self->write_end != -1)
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#define ADJUST_POSITION(self, _new_pos) \
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do { \
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self->pos = _new_pos; \
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if (VALID_READ_BUFFER(self) && self->read_end < self->pos) \
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self->read_end = self->pos; \
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} while(0)
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#define READAHEAD(self) \
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((self->readable && VALID_READ_BUFFER(self)) \
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? (self->read_end - self->pos) : 0)
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#define RAW_OFFSET(self) \
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(((VALID_READ_BUFFER(self) || VALID_WRITE_BUFFER(self)) \
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&& self->raw_pos >= 0) ? self->raw_pos - self->pos : 0)
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#define RAW_TELL(self) \
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(self->abs_pos != -1 ? self->abs_pos : _buffered_raw_tell(self))
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#define MINUS_LAST_BLOCK(self, size) \
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(self->buffer_mask ? \
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(size & ~self->buffer_mask) : \
|
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(self->buffer_size * (size / self->buffer_size)))
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|
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static int
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buffered_clear(PyObject *op)
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{
|
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buffered *self = buffered_CAST(op);
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self->ok = 0;
|
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Py_CLEAR(self->raw);
|
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Py_CLEAR(self->dict);
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return 0;
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}
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|
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static void
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buffered_dealloc(PyObject *op)
|
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{
|
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buffered *self = buffered_CAST(op);
|
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PyTypeObject *tp = Py_TYPE(self);
|
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self->finalizing = 1;
|
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if (_PyIOBase_finalize(op) < 0)
|
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return;
|
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_PyObject_GC_UNTRACK(self);
|
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self->ok = 0;
|
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FT_CLEAR_WEAKREFS(op, self->weakreflist);
|
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if (self->buffer) {
|
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PyMem_Free(self->buffer);
|
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self->buffer = NULL;
|
|
}
|
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if (self->lock) {
|
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PyThread_free_lock(self->lock);
|
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self->lock = NULL;
|
|
}
|
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(void)buffered_clear(op);
|
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tp->tp_free(self);
|
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Py_DECREF(tp);
|
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}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.__sizeof__
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
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_io__Buffered___sizeof___impl(buffered *self)
|
|
/*[clinic end generated code: output=0231ef7f5053134e input=07a32d578073ea64]*/
|
|
{
|
|
size_t res = _PyObject_SIZE(Py_TYPE(self));
|
|
if (self->buffer) {
|
|
res += (size_t)self->buffer_size;
|
|
}
|
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return PyLong_FromSize_t(res);
|
|
}
|
|
|
|
static int
|
|
buffered_traverse(PyObject *op, visitproc visit, void *arg)
|
|
{
|
|
buffered *self = buffered_CAST(op);
|
|
Py_VISIT(Py_TYPE(self));
|
|
Py_VISIT(self->raw);
|
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Py_VISIT(self->dict);
|
|
return 0;
|
|
}
|
|
|
|
/* Because this can call arbitrary code, it shouldn't be called when
|
|
the refcount is 0 (that is, not directly from tp_dealloc unless
|
|
the refcount has been temporarily re-incremented). */
|
|
/*[clinic input]
|
|
_io._Buffered._dealloc_warn
|
|
|
|
source: object
|
|
/
|
|
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered__dealloc_warn_impl(buffered *self, PyObject *source)
|
|
/*[clinic end generated code: output=d8db21c6dec0e614 input=8f845f2a4786391c]*/
|
|
{
|
|
if (self->ok && self->raw) {
|
|
PyObject *r;
|
|
r = PyObject_CallMethodOneArg(self->raw, &_Py_ID(_dealloc_warn), source);
|
|
if (r)
|
|
Py_DECREF(r);
|
|
else
|
|
PyErr_Clear();
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*
|
|
* _BufferedIOMixin methods
|
|
* This is not a class, just a collection of methods that will be reused
|
|
* by BufferedReader and BufferedWriter
|
|
*/
|
|
|
|
/* Flush and close */
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.flush as _io__Buffered_simple_flush
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_simple_flush_impl(buffered *self)
|
|
/*[clinic end generated code: output=29ebb3820db1bdfd input=5248cb84a65f80bd]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return PyObject_CallMethodNoArgs(self->raw, &_Py_ID(flush));
|
|
}
|
|
|
|
static int
|
|
buffered_closed(buffered *self)
|
|
{
|
|
int closed;
|
|
PyObject *res;
|
|
CHECK_INITIALIZED_INT(self)
|
|
res = PyObject_GetAttr(self->raw, &_Py_ID(closed));
|
|
if (res == NULL)
|
|
return -1;
|
|
closed = PyObject_IsTrue(res);
|
|
Py_DECREF(res);
|
|
return closed;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
@getter
|
|
_io._Buffered.closed
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_closed_get_impl(buffered *self)
|
|
/*[clinic end generated code: output=f08ce57290703a1a input=18eddefdfe4a3d2f]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return PyObject_GetAttr(self->raw, &_Py_ID(closed));
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.close
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_close_impl(buffered *self)
|
|
/*[clinic end generated code: output=7280b7b42033be0c input=56d95935b03fd326]*/
|
|
{
|
|
PyObject *res = NULL;
|
|
int r;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
if (!ENTER_BUFFERED(self)) {
|
|
return NULL;
|
|
}
|
|
|
|
r = buffered_closed(self);
|
|
if (r < 0)
|
|
goto end;
|
|
if (r > 0) {
|
|
res = Py_NewRef(Py_None);
|
|
goto end;
|
|
}
|
|
|
|
if (self->finalizing) {
|
|
PyObject *r = _io__Buffered__dealloc_warn_impl(self, (PyObject *)self);
|
|
if (r)
|
|
Py_DECREF(r);
|
|
else
|
|
PyErr_Clear();
|
|
}
|
|
/* flush() will most probably re-take the lock, so drop it first */
|
|
LEAVE_BUFFERED(self)
|
|
r = _PyFile_Flush((PyObject *)self);
|
|
if (!ENTER_BUFFERED(self)) {
|
|
return NULL;
|
|
}
|
|
PyObject *exc = NULL;
|
|
if (r < 0) {
|
|
exc = PyErr_GetRaisedException();
|
|
}
|
|
|
|
res = PyObject_CallMethodNoArgs(self->raw, &_Py_ID(close));
|
|
|
|
if (self->buffer) {
|
|
PyMem_Free(self->buffer);
|
|
self->buffer = NULL;
|
|
}
|
|
|
|
if (exc != NULL) {
|
|
_PyErr_ChainExceptions1(exc);
|
|
Py_CLEAR(res);
|
|
}
|
|
|
|
self->read_end = 0;
|
|
self->pos = 0;
|
|
|
|
end:
|
|
LEAVE_BUFFERED(self)
|
|
return res;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.detach
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_detach_impl(buffered *self)
|
|
/*[clinic end generated code: output=dd0fc057b8b779f7 input=d4ef1828a678be37]*/
|
|
{
|
|
PyObject *raw;
|
|
CHECK_INITIALIZED(self)
|
|
if (_PyFile_Flush((PyObject *)self) < 0) {
|
|
return NULL;
|
|
}
|
|
raw = self->raw;
|
|
self->raw = NULL;
|
|
self->detached = 1;
|
|
self->ok = 0;
|
|
return raw;
|
|
}
|
|
|
|
/* Inquiries */
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.seekable
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_seekable_impl(buffered *self)
|
|
/*[clinic end generated code: output=90172abb5ceb6e8f input=e3a4fc1d297b2fd3]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return PyObject_CallMethodNoArgs(self->raw, &_Py_ID(seekable));
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.readable
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_readable_impl(buffered *self)
|
|
/*[clinic end generated code: output=92afa07661ecb698 input=abe54107d59bca9a]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return PyObject_CallMethodNoArgs(self->raw, &_Py_ID(readable));
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.writable
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_writable_impl(buffered *self)
|
|
/*[clinic end generated code: output=4e3eee8d6f9d8552 input=45eb76bf6a10e6f7]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return PyObject_CallMethodNoArgs(self->raw, &_Py_ID(writable));
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
@getter
|
|
_io._Buffered.name
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_name_get_impl(buffered *self)
|
|
/*[clinic end generated code: output=d2adf384051d3d10 input=6b84a0e6126f545e]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return PyObject_GetAttr(self->raw, &_Py_ID(name));
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
@getter
|
|
_io._Buffered.mode
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_mode_get_impl(buffered *self)
|
|
/*[clinic end generated code: output=0feb205748892fa4 input=0762d5e28542fd8c]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return PyObject_GetAttr(self->raw, &_Py_ID(mode));
|
|
}
|
|
|
|
/* Lower-level APIs */
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.fileno
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_fileno_impl(buffered *self)
|
|
/*[clinic end generated code: output=b717648d58a95ee3 input=1c4fead777bae20a]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return PyObject_CallMethodNoArgs(self->raw, &_Py_ID(fileno));
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.isatty
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_isatty_impl(buffered *self)
|
|
/*[clinic end generated code: output=c20e55caae67baea input=e53d182d7e490e3a]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return PyObject_CallMethodNoArgs(self->raw, &_Py_ID(isatty));
|
|
}
|
|
|
|
/* Forward decls */
|
|
static PyObject *
|
|
_bufferedwriter_flush_unlocked(buffered *);
|
|
static Py_ssize_t
|
|
_bufferedreader_fill_buffer(buffered *self);
|
|
static void
|
|
_bufferedreader_reset_buf(buffered *self);
|
|
static void
|
|
_bufferedwriter_reset_buf(buffered *self);
|
|
static PyObject *
|
|
_bufferedreader_peek_unlocked(buffered *self);
|
|
static PyObject *
|
|
_bufferedreader_read_all(buffered *self);
|
|
static PyObject *
|
|
_bufferedreader_read_fast(buffered *self, Py_ssize_t);
|
|
static PyObject *
|
|
_bufferedreader_read_generic(buffered *self, Py_ssize_t);
|
|
static Py_ssize_t
|
|
_bufferedreader_raw_read(buffered *self, char *start, Py_ssize_t len);
|
|
|
|
/*
|
|
* Helpers
|
|
*/
|
|
|
|
/* Sets the current error to BlockingIOError */
|
|
static void
|
|
_set_BlockingIOError(const char *msg, Py_ssize_t written)
|
|
{
|
|
PyObject *err;
|
|
PyErr_Clear();
|
|
err = PyObject_CallFunction(PyExc_BlockingIOError, "isn",
|
|
errno, msg, written);
|
|
if (err)
|
|
PyErr_SetObject(PyExc_BlockingIOError, err);
|
|
Py_XDECREF(err);
|
|
}
|
|
|
|
/* Returns the address of the `written` member if a BlockingIOError was
|
|
raised, NULL otherwise. The error is always re-raised. */
|
|
static Py_ssize_t *
|
|
_buffered_check_blocking_error(void)
|
|
{
|
|
PyObject *exc = PyErr_GetRaisedException();
|
|
if (exc == NULL || !PyErr_GivenExceptionMatches(exc, PyExc_BlockingIOError)) {
|
|
PyErr_SetRaisedException(exc);
|
|
return NULL;
|
|
}
|
|
PyOSErrorObject *err = (PyOSErrorObject *)exc;
|
|
/* TODO: sanity check (err->written >= 0) */
|
|
PyErr_SetRaisedException(exc);
|
|
return &err->written;
|
|
}
|
|
|
|
static Py_off_t
|
|
_buffered_raw_tell(buffered *self)
|
|
{
|
|
Py_off_t n;
|
|
PyObject *res;
|
|
res = PyObject_CallMethodNoArgs(self->raw, &_Py_ID(tell));
|
|
if (res == NULL)
|
|
return -1;
|
|
n = PyNumber_AsOff_t(res, PyExc_ValueError);
|
|
Py_DECREF(res);
|
|
if (n < 0) {
|
|
if (!PyErr_Occurred())
|
|
PyErr_Format(PyExc_OSError,
|
|
"Raw stream returned invalid position %" PY_PRIdOFF,
|
|
(PY_OFF_T_COMPAT)n);
|
|
return -1;
|
|
}
|
|
self->abs_pos = n;
|
|
return n;
|
|
}
|
|
|
|
static Py_off_t
|
|
_buffered_raw_seek(buffered *self, Py_off_t target, int whence)
|
|
{
|
|
PyObject *res, *posobj, *whenceobj;
|
|
Py_off_t n;
|
|
|
|
posobj = PyLong_FromOff_t(target);
|
|
if (posobj == NULL)
|
|
return -1;
|
|
whenceobj = PyLong_FromLong(whence);
|
|
if (whenceobj == NULL) {
|
|
Py_DECREF(posobj);
|
|
return -1;
|
|
}
|
|
res = PyObject_CallMethodObjArgs(self->raw, &_Py_ID(seek),
|
|
posobj, whenceobj, NULL);
|
|
Py_DECREF(posobj);
|
|
Py_DECREF(whenceobj);
|
|
if (res == NULL)
|
|
return -1;
|
|
n = PyNumber_AsOff_t(res, PyExc_ValueError);
|
|
Py_DECREF(res);
|
|
if (n < 0) {
|
|
if (!PyErr_Occurred())
|
|
PyErr_Format(PyExc_OSError,
|
|
"Raw stream returned invalid position %" PY_PRIdOFF,
|
|
(PY_OFF_T_COMPAT)n);
|
|
return -1;
|
|
}
|
|
self->abs_pos = n;
|
|
return n;
|
|
}
|
|
|
|
static int
|
|
_buffered_init(buffered *self)
|
|
{
|
|
Py_ssize_t n;
|
|
if (self->buffer_size <= 0) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"buffer size must be strictly positive");
|
|
return -1;
|
|
}
|
|
if (self->buffer)
|
|
PyMem_Free(self->buffer);
|
|
self->buffer = PyMem_Malloc(self->buffer_size);
|
|
if (self->buffer == NULL) {
|
|
PyErr_NoMemory();
|
|
return -1;
|
|
}
|
|
if (self->lock)
|
|
PyThread_free_lock(self->lock);
|
|
self->lock = PyThread_allocate_lock();
|
|
if (self->lock == NULL) {
|
|
PyErr_SetString(PyExc_RuntimeError, "can't allocate read lock");
|
|
return -1;
|
|
}
|
|
self->owner = 0;
|
|
/* Find out whether buffer_size is a power of 2 */
|
|
/* XXX is this optimization useful? */
|
|
for (n = self->buffer_size - 1; n & 1; n >>= 1)
|
|
;
|
|
if (n == 0)
|
|
self->buffer_mask = self->buffer_size - 1;
|
|
else
|
|
self->buffer_mask = 0;
|
|
if (_buffered_raw_tell(self) == -1)
|
|
PyErr_Clear();
|
|
return 0;
|
|
}
|
|
|
|
/* Return 1 if an OSError with errno == EINTR is set (and then
|
|
clears the error indicator), 0 otherwise.
|
|
Should only be called when PyErr_Occurred() is true.
|
|
*/
|
|
int
|
|
_PyIO_trap_eintr(void)
|
|
{
|
|
if (!PyErr_ExceptionMatches(PyExc_OSError)) {
|
|
return 0;
|
|
}
|
|
PyObject *exc = PyErr_GetRaisedException();
|
|
PyOSErrorObject *env_err = (PyOSErrorObject *)exc;
|
|
assert(env_err != NULL);
|
|
if (env_err->myerrno != NULL) {
|
|
assert(EINTR > 0 && EINTR < INT_MAX);
|
|
assert(PyLong_CheckExact(env_err->myerrno));
|
|
int overflow;
|
|
int myerrno = PyLong_AsLongAndOverflow(env_err->myerrno, &overflow);
|
|
PyErr_Clear();
|
|
if (myerrno == EINTR) {
|
|
Py_DECREF(exc);
|
|
return 1;
|
|
}
|
|
}
|
|
/* This silences any error set by PyObject_RichCompareBool() */
|
|
PyErr_SetRaisedException(exc);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Shared methods and wrappers
|
|
*/
|
|
|
|
static PyObject *
|
|
buffered_flush_and_rewind_unlocked(buffered *self)
|
|
{
|
|
PyObject *res;
|
|
|
|
res = _bufferedwriter_flush_unlocked(self);
|
|
if (res == NULL)
|
|
return NULL;
|
|
Py_DECREF(res);
|
|
|
|
if (self->readable) {
|
|
/* Rewind the raw stream so that its position corresponds to
|
|
the current logical position. */
|
|
Py_off_t n;
|
|
n = _buffered_raw_seek(self, -RAW_OFFSET(self), 1);
|
|
_bufferedreader_reset_buf(self);
|
|
if (n == -1)
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.flush
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_flush_impl(buffered *self)
|
|
/*[clinic end generated code: output=da2674ef1ce71f3a input=6b30de9f083419c2]*/
|
|
{
|
|
PyObject *res;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
CHECK_CLOSED(self, "flush of closed file")
|
|
|
|
if (!ENTER_BUFFERED(self))
|
|
return NULL;
|
|
res = buffered_flush_and_rewind_unlocked(self);
|
|
LEAVE_BUFFERED(self)
|
|
|
|
return res;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.peek
|
|
size: Py_ssize_t = 0
|
|
/
|
|
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_peek_impl(buffered *self, Py_ssize_t size)
|
|
/*[clinic end generated code: output=ba7a097ca230102b input=56733376f926d982]*/
|
|
{
|
|
PyObject *res = NULL;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
CHECK_CLOSED(self, "peek of closed file")
|
|
|
|
if (!ENTER_BUFFERED(self))
|
|
return NULL;
|
|
|
|
if (self->writable) {
|
|
res = buffered_flush_and_rewind_unlocked(self);
|
|
if (res == NULL)
|
|
goto end;
|
|
Py_CLEAR(res);
|
|
}
|
|
res = _bufferedreader_peek_unlocked(self);
|
|
|
|
end:
|
|
LEAVE_BUFFERED(self)
|
|
return res;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.read
|
|
size as n: Py_ssize_t(accept={int, NoneType}) = -1
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_read_impl(buffered *self, Py_ssize_t n)
|
|
/*[clinic end generated code: output=f41c78bb15b9bbe9 input=bdb4b0425b295472]*/
|
|
{
|
|
PyObject *res;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
if (n < -1) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"read length must be non-negative or -1");
|
|
return NULL;
|
|
}
|
|
|
|
CHECK_CLOSED(self, "read of closed file")
|
|
|
|
if (n == -1) {
|
|
/* The number of bytes is unspecified, read until the end of stream */
|
|
if (!ENTER_BUFFERED(self))
|
|
return NULL;
|
|
res = _bufferedreader_read_all(self);
|
|
}
|
|
else {
|
|
res = _bufferedreader_read_fast(self, n);
|
|
if (res != Py_None)
|
|
return res;
|
|
Py_DECREF(res);
|
|
if (!ENTER_BUFFERED(self))
|
|
return NULL;
|
|
res = _bufferedreader_read_generic(self, n);
|
|
}
|
|
|
|
LEAVE_BUFFERED(self)
|
|
return res;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.read1
|
|
size as n: Py_ssize_t = -1
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_read1_impl(buffered *self, Py_ssize_t n)
|
|
/*[clinic end generated code: output=bcc4fb4e54d103a3 input=3d0ad241aa52b36c]*/
|
|
{
|
|
Py_ssize_t have, r;
|
|
PyObject *res = NULL;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
if (n < 0) {
|
|
n = self->buffer_size;
|
|
}
|
|
|
|
CHECK_CLOSED(self, "read of closed file")
|
|
|
|
if (n == 0)
|
|
return PyBytes_FromStringAndSize(NULL, 0);
|
|
|
|
/* Return up to n bytes. If at least one byte is buffered, we
|
|
only return buffered bytes. Otherwise, we do one raw read. */
|
|
|
|
have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
|
|
if (have > 0) {
|
|
n = Py_MIN(have, n);
|
|
res = _bufferedreader_read_fast(self, n);
|
|
assert(res != Py_None);
|
|
return res;
|
|
}
|
|
res = PyBytes_FromStringAndSize(NULL, n);
|
|
if (res == NULL)
|
|
return NULL;
|
|
if (!ENTER_BUFFERED(self)) {
|
|
Py_DECREF(res);
|
|
return NULL;
|
|
}
|
|
/* Flush the write buffer if necessary */
|
|
if (self->writable) {
|
|
PyObject *r = buffered_flush_and_rewind_unlocked(self);
|
|
if (r == NULL) {
|
|
LEAVE_BUFFERED(self)
|
|
Py_DECREF(res);
|
|
return NULL;
|
|
}
|
|
Py_DECREF(r);
|
|
}
|
|
_bufferedreader_reset_buf(self);
|
|
r = _bufferedreader_raw_read(self, PyBytes_AS_STRING(res), n);
|
|
LEAVE_BUFFERED(self)
|
|
if (r == -1) {
|
|
Py_DECREF(res);
|
|
return NULL;
|
|
}
|
|
if (r == -2)
|
|
r = 0;
|
|
if (n > r)
|
|
_PyBytes_Resize(&res, r);
|
|
return res;
|
|
}
|
|
|
|
static PyObject *
|
|
_buffered_readinto_generic(buffered *self, Py_buffer *buffer, char readinto1)
|
|
{
|
|
Py_ssize_t n, written = 0, remaining;
|
|
PyObject *res = NULL;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
CHECK_CLOSED(self, "readinto of closed file")
|
|
|
|
n = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
|
|
if (n > 0) {
|
|
if (n >= buffer->len) {
|
|
memcpy(buffer->buf, self->buffer + self->pos, buffer->len);
|
|
self->pos += buffer->len;
|
|
return PyLong_FromSsize_t(buffer->len);
|
|
}
|
|
memcpy(buffer->buf, self->buffer + self->pos, n);
|
|
self->pos += n;
|
|
written = n;
|
|
}
|
|
|
|
if (!ENTER_BUFFERED(self))
|
|
return NULL;
|
|
|
|
if (self->writable) {
|
|
res = buffered_flush_and_rewind_unlocked(self);
|
|
if (res == NULL)
|
|
goto end;
|
|
Py_CLEAR(res);
|
|
}
|
|
|
|
_bufferedreader_reset_buf(self);
|
|
self->pos = 0;
|
|
|
|
for (remaining = buffer->len - written;
|
|
remaining > 0;
|
|
written += n, remaining -= n) {
|
|
/* If remaining bytes is larger than internal buffer size, copy
|
|
* directly into caller's buffer. */
|
|
if (remaining > self->buffer_size) {
|
|
n = _bufferedreader_raw_read(self, (char *) buffer->buf + written,
|
|
remaining);
|
|
}
|
|
|
|
/* In readinto1 mode, we do not want to fill the internal
|
|
buffer if we already have some data to return */
|
|
else if (!(readinto1 && written)) {
|
|
n = _bufferedreader_fill_buffer(self);
|
|
if (n > 0) {
|
|
if (n > remaining)
|
|
n = remaining;
|
|
memcpy((char *) buffer->buf + written,
|
|
self->buffer + self->pos, n);
|
|
self->pos += n;
|
|
continue; /* short circuit */
|
|
}
|
|
}
|
|
else
|
|
n = 0;
|
|
|
|
if (n == 0 || (n == -2 && written > 0))
|
|
break;
|
|
if (n < 0) {
|
|
if (n == -2) {
|
|
res = Py_NewRef(Py_None);
|
|
}
|
|
goto end;
|
|
}
|
|
|
|
/* At most one read in readinto1 mode */
|
|
if (readinto1) {
|
|
written += n;
|
|
break;
|
|
}
|
|
}
|
|
res = PyLong_FromSsize_t(written);
|
|
|
|
end:
|
|
LEAVE_BUFFERED(self);
|
|
return res;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.readinto
|
|
buffer: Py_buffer(accept={rwbuffer})
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_readinto_impl(buffered *self, Py_buffer *buffer)
|
|
/*[clinic end generated code: output=bcb376580b1d8170 input=777c33e7adaa2bcd]*/
|
|
{
|
|
return _buffered_readinto_generic(self, buffer, 0);
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.readinto1
|
|
buffer: Py_buffer(accept={rwbuffer})
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_readinto1_impl(buffered *self, Py_buffer *buffer)
|
|
/*[clinic end generated code: output=6e5c6ac5868205d6 input=ef03cc5fc92a6895]*/
|
|
{
|
|
return _buffered_readinto_generic(self, buffer, 1);
|
|
}
|
|
|
|
|
|
static PyObject *
|
|
_buffered_readline(buffered *self, Py_ssize_t limit)
|
|
{
|
|
PyObject *res = NULL;
|
|
PyObject *chunks = NULL;
|
|
Py_ssize_t n;
|
|
const char *start, *s, *end;
|
|
|
|
CHECK_CLOSED(self, "readline of closed file")
|
|
|
|
/* First, try to find a line in the buffer. This can run unlocked because
|
|
the calls to the C API are simple enough that they can't trigger
|
|
any thread switch. */
|
|
n = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
|
|
if (limit >= 0 && n > limit)
|
|
n = limit;
|
|
start = self->buffer + self->pos;
|
|
s = memchr(start, '\n', n);
|
|
if (s != NULL) {
|
|
res = PyBytes_FromStringAndSize(start, s - start + 1);
|
|
if (res != NULL)
|
|
self->pos += s - start + 1;
|
|
goto end_unlocked;
|
|
}
|
|
if (n == limit) {
|
|
res = PyBytes_FromStringAndSize(start, n);
|
|
if (res != NULL)
|
|
self->pos += n;
|
|
goto end_unlocked;
|
|
}
|
|
|
|
if (!ENTER_BUFFERED(self))
|
|
goto end_unlocked;
|
|
|
|
/* Now we try to get some more from the raw stream */
|
|
chunks = PyList_New(0);
|
|
if (chunks == NULL)
|
|
goto end;
|
|
if (n > 0) {
|
|
res = PyBytes_FromStringAndSize(start, n);
|
|
if (res == NULL)
|
|
goto end;
|
|
if (PyList_Append(chunks, res) < 0) {
|
|
Py_CLEAR(res);
|
|
goto end;
|
|
}
|
|
Py_CLEAR(res);
|
|
self->pos += n;
|
|
if (limit >= 0)
|
|
limit -= n;
|
|
}
|
|
if (self->writable) {
|
|
PyObject *r = buffered_flush_and_rewind_unlocked(self);
|
|
if (r == NULL)
|
|
goto end;
|
|
Py_DECREF(r);
|
|
}
|
|
|
|
for (;;) {
|
|
_bufferedreader_reset_buf(self);
|
|
n = _bufferedreader_fill_buffer(self);
|
|
if (n == -1)
|
|
goto end;
|
|
if (n <= 0)
|
|
break;
|
|
if (limit >= 0 && n > limit)
|
|
n = limit;
|
|
start = self->buffer;
|
|
end = start + n;
|
|
s = start;
|
|
while (s < end) {
|
|
if (*s++ == '\n') {
|
|
res = PyBytes_FromStringAndSize(start, s - start);
|
|
if (res == NULL)
|
|
goto end;
|
|
self->pos = s - start;
|
|
goto found;
|
|
}
|
|
}
|
|
res = PyBytes_FromStringAndSize(start, n);
|
|
if (res == NULL)
|
|
goto end;
|
|
if (n == limit) {
|
|
self->pos = n;
|
|
break;
|
|
}
|
|
if (PyList_Append(chunks, res) < 0) {
|
|
Py_CLEAR(res);
|
|
goto end;
|
|
}
|
|
Py_CLEAR(res);
|
|
if (limit >= 0)
|
|
limit -= n;
|
|
}
|
|
found:
|
|
if (res != NULL && PyList_Append(chunks, res) < 0) {
|
|
Py_CLEAR(res);
|
|
goto end;
|
|
}
|
|
Py_XSETREF(res, PyBytes_Join((PyObject *)&_Py_SINGLETON(bytes_empty), chunks));
|
|
|
|
end:
|
|
LEAVE_BUFFERED(self)
|
|
end_unlocked:
|
|
Py_XDECREF(chunks);
|
|
return res;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.readline
|
|
size: Py_ssize_t(accept={int, NoneType}) = -1
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_readline_impl(buffered *self, Py_ssize_t size)
|
|
/*[clinic end generated code: output=24dd2aa6e33be83c input=e81ca5abd4280776]*/
|
|
{
|
|
CHECK_INITIALIZED(self)
|
|
return _buffered_readline(self, size);
|
|
}
|
|
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.tell
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_tell_impl(buffered *self)
|
|
/*[clinic end generated code: output=386972ae84716c1e input=ab12e67d8abcb42f]*/
|
|
{
|
|
Py_off_t pos;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
pos = _buffered_raw_tell(self);
|
|
if (pos == -1)
|
|
return NULL;
|
|
pos -= RAW_OFFSET(self);
|
|
|
|
// GH-95782
|
|
if (pos < 0)
|
|
pos = 0;
|
|
|
|
return PyLong_FromOff_t(pos);
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.seek
|
|
target as targetobj: object
|
|
whence: int = 0
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_seek_impl(buffered *self, PyObject *targetobj, int whence)
|
|
/*[clinic end generated code: output=7ae0e8dc46efdefb input=b5a12be70e0ad07b]*/
|
|
{
|
|
Py_off_t target, n;
|
|
PyObject *res = NULL;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
|
|
/* Do some error checking instead of trusting OS 'seek()'
|
|
** error detection, just in case.
|
|
*/
|
|
if ((whence < 0 || whence >2)
|
|
#ifdef SEEK_HOLE
|
|
&& (whence != SEEK_HOLE)
|
|
#endif
|
|
#ifdef SEEK_DATA
|
|
&& (whence != SEEK_DATA)
|
|
#endif
|
|
) {
|
|
PyErr_Format(PyExc_ValueError,
|
|
"whence value %d unsupported", whence);
|
|
return NULL;
|
|
}
|
|
|
|
CHECK_CLOSED(self, "seek of closed file")
|
|
|
|
_PyIO_State *state = find_io_state_by_def(Py_TYPE(self));
|
|
if (_PyIOBase_check_seekable(state, self->raw, Py_True) == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
target = PyNumber_AsOff_t(targetobj, PyExc_ValueError);
|
|
if (target == -1 && PyErr_Occurred())
|
|
return NULL;
|
|
|
|
/* SEEK_SET and SEEK_CUR are special because we could seek inside the
|
|
buffer. Other whence values must be managed without this optimization.
|
|
Some Operating Systems can provide additional values, like
|
|
SEEK_HOLE/SEEK_DATA. */
|
|
if (((whence == 0) || (whence == 1)) && self->readable) {
|
|
Py_off_t current, avail;
|
|
/* Check if seeking leaves us inside the current buffer,
|
|
so as to return quickly if possible. Also, we needn't take the
|
|
lock in this fast path.
|
|
Don't know how to do that when whence == 2, though. */
|
|
/* NOTE: RAW_TELL() can release the GIL but the object is in a stable
|
|
state at this point. */
|
|
current = RAW_TELL(self);
|
|
avail = READAHEAD(self);
|
|
if (avail > 0) {
|
|
Py_off_t offset;
|
|
if (whence == 0)
|
|
offset = target - (current - RAW_OFFSET(self));
|
|
else
|
|
offset = target;
|
|
if (offset >= -self->pos && offset <= avail) {
|
|
self->pos += offset;
|
|
|
|
// GH-95782
|
|
if (current - avail + offset < 0)
|
|
return PyLong_FromOff_t(0);
|
|
|
|
return PyLong_FromOff_t(current - avail + offset);
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!ENTER_BUFFERED(self))
|
|
return NULL;
|
|
|
|
/* Fallback: invoke raw seek() method and clear buffer */
|
|
if (self->writable) {
|
|
res = _bufferedwriter_flush_unlocked(self);
|
|
if (res == NULL)
|
|
goto end;
|
|
Py_CLEAR(res);
|
|
}
|
|
|
|
/* TODO: align on block boundary and read buffer if needed? */
|
|
if (whence == 1)
|
|
target -= RAW_OFFSET(self);
|
|
n = _buffered_raw_seek(self, target, whence);
|
|
if (n == -1)
|
|
goto end;
|
|
self->raw_pos = -1;
|
|
res = PyLong_FromOff_t(n);
|
|
if (res != NULL && self->readable)
|
|
_bufferedreader_reset_buf(self);
|
|
|
|
end:
|
|
LEAVE_BUFFERED(self)
|
|
return res;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io._Buffered.truncate
|
|
cls: defining_class
|
|
pos: object = None
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io__Buffered_truncate_impl(buffered *self, PyTypeObject *cls, PyObject *pos)
|
|
/*[clinic end generated code: output=fe3882fbffe79f1a input=e3cbf794575bd794]*/
|
|
{
|
|
PyObject *res = NULL;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
CHECK_CLOSED(self, "truncate of closed file")
|
|
if (!self->writable) {
|
|
_PyIO_State *state = get_io_state_by_cls(cls);
|
|
return bufferediobase_unsupported(state, "truncate");
|
|
}
|
|
if (!ENTER_BUFFERED(self))
|
|
return NULL;
|
|
|
|
res = buffered_flush_and_rewind_unlocked(self);
|
|
if (res == NULL) {
|
|
goto end;
|
|
}
|
|
Py_CLEAR(res);
|
|
|
|
res = PyObject_CallMethodOneArg(self->raw, &_Py_ID(truncate), pos);
|
|
if (res == NULL)
|
|
goto end;
|
|
/* Reset cached position */
|
|
if (_buffered_raw_tell(self) == -1)
|
|
PyErr_Clear();
|
|
|
|
end:
|
|
LEAVE_BUFFERED(self)
|
|
return res;
|
|
}
|
|
|
|
static PyObject *
|
|
buffered_iternext(PyObject *op)
|
|
{
|
|
buffered *self = buffered_CAST(op);
|
|
PyObject *line;
|
|
PyTypeObject *tp;
|
|
|
|
CHECK_INITIALIZED(self);
|
|
|
|
_PyIO_State *state = find_io_state_by_def(Py_TYPE(self));
|
|
tp = Py_TYPE(self);
|
|
if (Py_IS_TYPE(tp, state->PyBufferedReader_Type) ||
|
|
Py_IS_TYPE(tp, state->PyBufferedRandom_Type))
|
|
{
|
|
/* Skip method call overhead for speed */
|
|
line = _buffered_readline(self, -1);
|
|
}
|
|
else {
|
|
line = PyObject_CallMethodNoArgs((PyObject *)self,
|
|
&_Py_ID(readline));
|
|
if (line && !PyBytes_Check(line)) {
|
|
PyErr_Format(PyExc_OSError,
|
|
"readline() should have returned a bytes object, "
|
|
"not '%.200s'", Py_TYPE(line)->tp_name);
|
|
Py_DECREF(line);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
if (line == NULL)
|
|
return NULL;
|
|
|
|
if (PyBytes_GET_SIZE(line) == 0) {
|
|
/* Reached EOF or would have blocked */
|
|
Py_DECREF(line);
|
|
return NULL;
|
|
}
|
|
|
|
return line;
|
|
}
|
|
|
|
static PyObject *
|
|
buffered_repr(PyObject *op)
|
|
{
|
|
buffered *self = buffered_CAST(op);
|
|
PyObject *nameobj, *res;
|
|
|
|
if (PyObject_GetOptionalAttr((PyObject *) self, &_Py_ID(name), &nameobj) < 0) {
|
|
if (!PyErr_ExceptionMatches(PyExc_ValueError)) {
|
|
return NULL;
|
|
}
|
|
/* Ignore ValueError raised if the underlying stream was detached */
|
|
PyErr_Clear();
|
|
}
|
|
if (nameobj == NULL) {
|
|
res = PyUnicode_FromFormat("<%s>", Py_TYPE(self)->tp_name);
|
|
}
|
|
else {
|
|
int status = Py_ReprEnter((PyObject *)self);
|
|
res = NULL;
|
|
if (status == 0) {
|
|
res = PyUnicode_FromFormat("<%s name=%R>",
|
|
Py_TYPE(self)->tp_name, nameobj);
|
|
Py_ReprLeave((PyObject *)self);
|
|
}
|
|
else if (status > 0) {
|
|
PyErr_Format(PyExc_RuntimeError,
|
|
"reentrant call inside %s.__repr__",
|
|
Py_TYPE(self)->tp_name);
|
|
}
|
|
Py_DECREF(nameobj);
|
|
}
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* class BufferedReader
|
|
*/
|
|
|
|
static void _bufferedreader_reset_buf(buffered *self)
|
|
{
|
|
self->read_end = -1;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_io.BufferedReader.__init__
|
|
raw: object
|
|
buffer_size: Py_ssize_t(c_default="DEFAULT_BUFFER_SIZE") = DEFAULT_BUFFER_SIZE
|
|
|
|
Create a new buffered reader using the given readable raw IO object.
|
|
[clinic start generated code]*/
|
|
|
|
static int
|
|
_io_BufferedReader___init___impl(buffered *self, PyObject *raw,
|
|
Py_ssize_t buffer_size)
|
|
/*[clinic end generated code: output=cddcfefa0ed294c4 input=fb887e06f11b4e48]*/
|
|
{
|
|
self->ok = 0;
|
|
self->detached = 0;
|
|
|
|
_PyIO_State *state = find_io_state_by_def(Py_TYPE(self));
|
|
if (_PyIOBase_check_readable(state, raw, Py_True) == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
Py_XSETREF(self->raw, Py_NewRef(raw));
|
|
self->buffer_size = buffer_size;
|
|
self->readable = 1;
|
|
self->writable = 0;
|
|
|
|
if (_buffered_init(self) < 0)
|
|
return -1;
|
|
_bufferedreader_reset_buf(self);
|
|
|
|
self->fast_closed_checks = (
|
|
Py_IS_TYPE(self, state->PyBufferedReader_Type) &&
|
|
Py_IS_TYPE(raw, state->PyFileIO_Type)
|
|
);
|
|
|
|
self->ok = 1;
|
|
return 0;
|
|
}
|
|
|
|
static Py_ssize_t
|
|
_bufferedreader_raw_read(buffered *self, char *start, Py_ssize_t len)
|
|
{
|
|
Py_buffer buf;
|
|
PyObject *memobj, *res;
|
|
Py_ssize_t n;
|
|
/* NOTE: the buffer needn't be released as its object is NULL. */
|
|
if (PyBuffer_FillInfo(&buf, NULL, start, len, 0, PyBUF_CONTIG) == -1)
|
|
return -1;
|
|
memobj = PyMemoryView_FromBuffer(&buf);
|
|
if (memobj == NULL)
|
|
return -1;
|
|
/* NOTE: PyErr_SetFromErrno() calls PyErr_CheckSignals() when EINTR
|
|
occurs so we needn't do it ourselves.
|
|
We then retry reading, ignoring the signal if no handler has
|
|
raised (see issue #10956).
|
|
*/
|
|
do {
|
|
res = PyObject_CallMethodOneArg(self->raw, &_Py_ID(readinto), memobj);
|
|
} while (res == NULL && _PyIO_trap_eintr());
|
|
Py_DECREF(memobj);
|
|
if (res == NULL)
|
|
return -1;
|
|
if (res == Py_None) {
|
|
/* Non-blocking stream would have blocked. Special return code! */
|
|
Py_DECREF(res);
|
|
return -2;
|
|
}
|
|
n = PyNumber_AsSsize_t(res, PyExc_ValueError);
|
|
Py_DECREF(res);
|
|
|
|
if (n == -1 && PyErr_Occurred()) {
|
|
_PyErr_FormatFromCause(
|
|
PyExc_OSError,
|
|
"raw readinto() failed"
|
|
);
|
|
return -1;
|
|
}
|
|
|
|
if (n < 0 || n > len) {
|
|
PyErr_Format(PyExc_OSError,
|
|
"raw readinto() returned invalid length %zd "
|
|
"(should have been between 0 and %zd)", n, len);
|
|
return -1;
|
|
}
|
|
if (n > 0 && self->abs_pos != -1)
|
|
self->abs_pos += n;
|
|
return n;
|
|
}
|
|
|
|
static Py_ssize_t
|
|
_bufferedreader_fill_buffer(buffered *self)
|
|
{
|
|
Py_ssize_t start, len, n;
|
|
if (VALID_READ_BUFFER(self))
|
|
start = Py_SAFE_DOWNCAST(self->read_end, Py_off_t, Py_ssize_t);
|
|
else
|
|
start = 0;
|
|
len = self->buffer_size - start;
|
|
n = _bufferedreader_raw_read(self, self->buffer + start, len);
|
|
if (n <= 0)
|
|
return n;
|
|
self->read_end = start + n;
|
|
self->raw_pos = start + n;
|
|
return n;
|
|
}
|
|
|
|
static PyObject *
|
|
_bufferedreader_read_all(buffered *self)
|
|
{
|
|
Py_ssize_t current_size;
|
|
PyObject *res = NULL, *data = NULL, *tmp = NULL, *chunks = NULL, *readall;
|
|
|
|
/* First copy what we have in the current buffer. */
|
|
current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
|
|
if (current_size) {
|
|
data = PyBytes_FromStringAndSize(
|
|
self->buffer + self->pos, current_size);
|
|
if (data == NULL)
|
|
return NULL;
|
|
self->pos += current_size;
|
|
}
|
|
/* We're going past the buffer's bounds, flush it */
|
|
if (self->writable) {
|
|
tmp = buffered_flush_and_rewind_unlocked(self);
|
|
if (tmp == NULL)
|
|
goto cleanup;
|
|
Py_CLEAR(tmp);
|
|
}
|
|
_bufferedreader_reset_buf(self);
|
|
|
|
if (PyObject_GetOptionalAttr(self->raw, &_Py_ID(readall), &readall) < 0) {
|
|
goto cleanup;
|
|
}
|
|
if (readall) {
|
|
tmp = _PyObject_CallNoArgs(readall);
|
|
Py_DECREF(readall);
|
|
if (tmp == NULL)
|
|
goto cleanup;
|
|
if (tmp != Py_None && !PyBytes_Check(tmp)) {
|
|
PyErr_SetString(PyExc_TypeError, "readall() should return bytes");
|
|
goto cleanup;
|
|
}
|
|
if (current_size == 0) {
|
|
res = tmp;
|
|
} else {
|
|
if (tmp != Py_None) {
|
|
PyBytes_Concat(&data, tmp);
|
|
}
|
|
res = data;
|
|
}
|
|
goto cleanup;
|
|
}
|
|
|
|
chunks = PyList_New(0);
|
|
if (chunks == NULL)
|
|
goto cleanup;
|
|
|
|
while (1) {
|
|
if (data) {
|
|
if (PyList_Append(chunks, data) < 0)
|
|
goto cleanup;
|
|
Py_CLEAR(data);
|
|
}
|
|
|
|
/* Read until EOF or until read() would block. */
|
|
data = PyObject_CallMethodNoArgs(self->raw, &_Py_ID(read));
|
|
if (data == NULL)
|
|
goto cleanup;
|
|
if (data != Py_None && !PyBytes_Check(data)) {
|
|
PyErr_SetString(PyExc_TypeError, "read() should return bytes");
|
|
goto cleanup;
|
|
}
|
|
if (data == Py_None || PyBytes_GET_SIZE(data) == 0) {
|
|
if (current_size == 0) {
|
|
res = data;
|
|
goto cleanup;
|
|
}
|
|
else {
|
|
tmp = PyBytes_Join((PyObject *)&_Py_SINGLETON(bytes_empty), chunks);
|
|
res = tmp;
|
|
goto cleanup;
|
|
}
|
|
}
|
|
current_size += PyBytes_GET_SIZE(data);
|
|
if (self->abs_pos != -1)
|
|
self->abs_pos += PyBytes_GET_SIZE(data);
|
|
}
|
|
cleanup:
|
|
/* res is either NULL or a borrowed ref */
|
|
Py_XINCREF(res);
|
|
Py_XDECREF(data);
|
|
Py_XDECREF(tmp);
|
|
Py_XDECREF(chunks);
|
|
return res;
|
|
}
|
|
|
|
/* Read n bytes from the buffer if it can, otherwise return None.
|
|
This function is simple enough that it can run unlocked. */
|
|
static PyObject *
|
|
_bufferedreader_read_fast(buffered *self, Py_ssize_t n)
|
|
{
|
|
Py_ssize_t current_size;
|
|
|
|
current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
|
|
if (n <= current_size) {
|
|
/* Fast path: the data to read is fully buffered. */
|
|
PyObject *res = PyBytes_FromStringAndSize(self->buffer + self->pos, n);
|
|
if (res != NULL)
|
|
self->pos += n;
|
|
return res;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
/* Generic read function: read from the stream until enough bytes are read,
|
|
* or until an EOF occurs or until read() would block.
|
|
*/
|
|
static PyObject *
|
|
_bufferedreader_read_generic(buffered *self, Py_ssize_t n)
|
|
{
|
|
PyObject *res = NULL;
|
|
Py_ssize_t current_size, remaining, written;
|
|
char *out;
|
|
|
|
current_size = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
|
|
if (n <= current_size)
|
|
return _bufferedreader_read_fast(self, n);
|
|
|
|
res = PyBytes_FromStringAndSize(NULL, n);
|
|
if (res == NULL)
|
|
goto error;
|
|
out = PyBytes_AS_STRING(res);
|
|
remaining = n;
|
|
written = 0;
|
|
if (current_size > 0) {
|
|
memcpy(out, self->buffer + self->pos, current_size);
|
|
remaining -= current_size;
|
|
written += current_size;
|
|
self->pos += current_size;
|
|
}
|
|
/* Flush the write buffer if necessary */
|
|
if (self->writable) {
|
|
PyObject *r = buffered_flush_and_rewind_unlocked(self);
|
|
if (r == NULL)
|
|
goto error;
|
|
Py_DECREF(r);
|
|
}
|
|
_bufferedreader_reset_buf(self);
|
|
while (remaining > 0) {
|
|
/* We want to read a whole block at the end into buffer.
|
|
If we had readv() we could do this in one pass. */
|
|
Py_ssize_t r = MINUS_LAST_BLOCK(self, remaining);
|
|
if (r == 0)
|
|
break;
|
|
r = _bufferedreader_raw_read(self, out + written, r);
|
|
if (r == -1)
|
|
goto error;
|
|
if (r == 0 || r == -2) {
|
|
/* EOF occurred or read() would block. */
|
|
if (r == 0 || written > 0) {
|
|
if (_PyBytes_Resize(&res, written))
|
|
goto error;
|
|
return res;
|
|
}
|
|
Py_DECREF(res);
|
|
Py_RETURN_NONE;
|
|
}
|
|
remaining -= r;
|
|
written += r;
|
|
}
|
|
assert(remaining <= self->buffer_size);
|
|
self->pos = 0;
|
|
self->raw_pos = 0;
|
|
self->read_end = 0;
|
|
/* NOTE: when the read is satisfied, we avoid issuing any additional
|
|
reads, which could block indefinitely (e.g. on a socket).
|
|
See issue #9550. */
|
|
while (remaining > 0 && self->read_end < self->buffer_size) {
|
|
Py_ssize_t r = _bufferedreader_fill_buffer(self);
|
|
if (r == -1)
|
|
goto error;
|
|
if (r == 0 || r == -2) {
|
|
/* EOF occurred or read() would block. */
|
|
if (r == 0 || written > 0) {
|
|
if (_PyBytes_Resize(&res, written))
|
|
goto error;
|
|
return res;
|
|
}
|
|
Py_DECREF(res);
|
|
Py_RETURN_NONE;
|
|
}
|
|
if (remaining > r) {
|
|
memcpy(out + written, self->buffer + self->pos, r);
|
|
written += r;
|
|
self->pos += r;
|
|
remaining -= r;
|
|
}
|
|
else if (remaining > 0) {
|
|
memcpy(out + written, self->buffer + self->pos, remaining);
|
|
written += remaining;
|
|
self->pos += remaining;
|
|
remaining = 0;
|
|
}
|
|
if (remaining == 0)
|
|
break;
|
|
}
|
|
|
|
return res;
|
|
|
|
error:
|
|
Py_XDECREF(res);
|
|
return NULL;
|
|
}
|
|
|
|
static PyObject *
|
|
_bufferedreader_peek_unlocked(buffered *self)
|
|
{
|
|
Py_ssize_t have, r;
|
|
|
|
have = Py_SAFE_DOWNCAST(READAHEAD(self), Py_off_t, Py_ssize_t);
|
|
/* Constraints:
|
|
1. we don't want to advance the file position.
|
|
2. we don't want to lose block alignment, so we can't shift the buffer
|
|
to make some place.
|
|
Therefore, we either return `have` bytes (if > 0), or a full buffer.
|
|
*/
|
|
if (have > 0) {
|
|
return PyBytes_FromStringAndSize(self->buffer + self->pos, have);
|
|
}
|
|
|
|
/* Fill the buffer from the raw stream, and copy it to the result. */
|
|
_bufferedreader_reset_buf(self);
|
|
r = _bufferedreader_fill_buffer(self);
|
|
if (r == -1)
|
|
return NULL;
|
|
if (r == -2)
|
|
r = 0;
|
|
self->pos = 0;
|
|
return PyBytes_FromStringAndSize(self->buffer, r);
|
|
}
|
|
|
|
|
|
/*
|
|
* class BufferedWriter
|
|
*/
|
|
static void
|
|
_bufferedwriter_reset_buf(buffered *self)
|
|
{
|
|
self->write_pos = 0;
|
|
self->write_end = -1;
|
|
}
|
|
|
|
/*[clinic input]
|
|
_io.BufferedWriter.__init__
|
|
raw: object
|
|
buffer_size: Py_ssize_t(c_default="DEFAULT_BUFFER_SIZE") = DEFAULT_BUFFER_SIZE
|
|
|
|
A buffer for a writeable sequential RawIO object.
|
|
|
|
The constructor creates a BufferedWriter for the given writeable raw
|
|
stream. If the buffer_size is not given, it defaults to
|
|
DEFAULT_BUFFER_SIZE.
|
|
[clinic start generated code]*/
|
|
|
|
static int
|
|
_io_BufferedWriter___init___impl(buffered *self, PyObject *raw,
|
|
Py_ssize_t buffer_size)
|
|
/*[clinic end generated code: output=c8942a020c0dee64 input=914be9b95e16007b]*/
|
|
{
|
|
self->ok = 0;
|
|
self->detached = 0;
|
|
|
|
_PyIO_State *state = find_io_state_by_def(Py_TYPE(self));
|
|
if (_PyIOBase_check_writable(state, raw, Py_True) == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
Py_INCREF(raw);
|
|
Py_XSETREF(self->raw, raw);
|
|
self->readable = 0;
|
|
self->writable = 1;
|
|
|
|
self->buffer_size = buffer_size;
|
|
if (_buffered_init(self) < 0)
|
|
return -1;
|
|
_bufferedwriter_reset_buf(self);
|
|
self->pos = 0;
|
|
|
|
self->fast_closed_checks = (
|
|
Py_IS_TYPE(self, state->PyBufferedWriter_Type) &&
|
|
Py_IS_TYPE(raw, state->PyFileIO_Type)
|
|
);
|
|
|
|
self->ok = 1;
|
|
return 0;
|
|
}
|
|
|
|
static Py_ssize_t
|
|
_bufferedwriter_raw_write(buffered *self, char *start, Py_ssize_t len)
|
|
{
|
|
Py_buffer buf;
|
|
PyObject *memobj, *res;
|
|
Py_ssize_t n;
|
|
int errnum;
|
|
/* NOTE: the buffer needn't be released as its object is NULL. */
|
|
if (PyBuffer_FillInfo(&buf, NULL, start, len, 1, PyBUF_CONTIG_RO) == -1)
|
|
return -1;
|
|
memobj = PyMemoryView_FromBuffer(&buf);
|
|
if (memobj == NULL)
|
|
return -1;
|
|
/* NOTE: PyErr_SetFromErrno() calls PyErr_CheckSignals() when EINTR
|
|
occurs so we needn't do it ourselves.
|
|
We then retry writing, ignoring the signal if no handler has
|
|
raised (see issue #10956).
|
|
*/
|
|
do {
|
|
errno = 0;
|
|
res = PyObject_CallMethodOneArg(self->raw, &_Py_ID(write), memobj);
|
|
errnum = errno;
|
|
} while (res == NULL && _PyIO_trap_eintr());
|
|
Py_DECREF(memobj);
|
|
if (res == NULL)
|
|
return -1;
|
|
if (res == Py_None) {
|
|
/* Non-blocking stream would have blocked. Special return code!
|
|
Being paranoid we reset errno in case it is changed by code
|
|
triggered by a decref. errno is used by _set_BlockingIOError(). */
|
|
Py_DECREF(res);
|
|
errno = errnum;
|
|
return -2;
|
|
}
|
|
n = PyNumber_AsSsize_t(res, PyExc_ValueError);
|
|
Py_DECREF(res);
|
|
if (n < 0 || n > len) {
|
|
PyErr_Format(PyExc_OSError,
|
|
"raw write() returned invalid length %zd "
|
|
"(should have been between 0 and %zd)", n, len);
|
|
return -1;
|
|
}
|
|
if (n > 0 && self->abs_pos != -1)
|
|
self->abs_pos += n;
|
|
return n;
|
|
}
|
|
|
|
static PyObject *
|
|
_bufferedwriter_flush_unlocked(buffered *self)
|
|
{
|
|
Py_off_t n, rewind;
|
|
|
|
if (!VALID_WRITE_BUFFER(self) || self->write_pos == self->write_end)
|
|
goto end;
|
|
/* First, rewind */
|
|
rewind = RAW_OFFSET(self) + (self->pos - self->write_pos);
|
|
if (rewind != 0) {
|
|
n = _buffered_raw_seek(self, -rewind, 1);
|
|
if (n < 0) {
|
|
goto error;
|
|
}
|
|
self->raw_pos -= rewind;
|
|
}
|
|
while (self->write_pos < self->write_end) {
|
|
n = _bufferedwriter_raw_write(self,
|
|
self->buffer + self->write_pos,
|
|
Py_SAFE_DOWNCAST(self->write_end - self->write_pos,
|
|
Py_off_t, Py_ssize_t));
|
|
if (n == -1) {
|
|
goto error;
|
|
}
|
|
else if (n == -2) {
|
|
_set_BlockingIOError("write could not complete without blocking",
|
|
0);
|
|
goto error;
|
|
}
|
|
self->write_pos += n;
|
|
self->raw_pos = self->write_pos;
|
|
/* Partial writes can return successfully when interrupted by a
|
|
signal (see write(2)). We must run signal handlers before
|
|
blocking another time, possibly indefinitely. */
|
|
if (PyErr_CheckSignals() < 0)
|
|
goto error;
|
|
}
|
|
|
|
|
|
end:
|
|
/* This ensures that after return from this function,
|
|
VALID_WRITE_BUFFER(self) returns false.
|
|
|
|
This is a required condition because when a tell() is called
|
|
after flushing and if VALID_READ_BUFFER(self) is false, we need
|
|
VALID_WRITE_BUFFER(self) to be false to have
|
|
RAW_OFFSET(self) == 0.
|
|
|
|
Issue: https://bugs.python.org/issue32228 */
|
|
_bufferedwriter_reset_buf(self);
|
|
Py_RETURN_NONE;
|
|
|
|
error:
|
|
return NULL;
|
|
}
|
|
|
|
/*[clinic input]
|
|
@critical_section
|
|
_io.BufferedWriter.write
|
|
buffer: Py_buffer
|
|
/
|
|
[clinic start generated code]*/
|
|
|
|
static PyObject *
|
|
_io_BufferedWriter_write_impl(buffered *self, Py_buffer *buffer)
|
|
/*[clinic end generated code: output=7f8d1365759bfc6b input=6a9c041de0c337be]*/
|
|
{
|
|
PyObject *res = NULL;
|
|
Py_ssize_t written, avail, remaining;
|
|
Py_off_t offset;
|
|
|
|
CHECK_INITIALIZED(self)
|
|
|
|
if (!ENTER_BUFFERED(self))
|
|
return NULL;
|
|
|
|
/* Issue #31976: Check for closed file after acquiring the lock. Another
|
|
thread could be holding the lock while closing the file. */
|
|
if (IS_CLOSED(self)) {
|
|
PyErr_SetString(PyExc_ValueError, "write to closed file");
|
|
goto error;
|
|
}
|
|
|
|
/* Fast path: the data to write can be fully buffered. */
|
|
if (!VALID_READ_BUFFER(self) && !VALID_WRITE_BUFFER(self)) {
|
|
self->pos = 0;
|
|
self->raw_pos = 0;
|
|
}
|
|
avail = Py_SAFE_DOWNCAST(self->buffer_size - self->pos, Py_off_t, Py_ssize_t);
|
|
if (buffer->len <= avail && buffer->len < self->buffer_size) {
|
|
memcpy(self->buffer + self->pos, buffer->buf, buffer->len);
|
|
if (!VALID_WRITE_BUFFER(self) || self->write_pos > self->pos) {
|
|
self->write_pos = self->pos;
|
|
}
|
|
ADJUST_POSITION(self, self->pos + buffer->len);
|
|
if (self->pos > self->write_end)
|
|
self->write_end = self->pos;
|
|
written = buffer->len;
|
|
goto end;
|
|
}
|
|
|
|
/* First write the current buffer */
|
|
res = _bufferedwriter_flush_unlocked(self);
|
|
if (res == NULL) {
|
|
Py_ssize_t *w = _buffered_check_blocking_error();
|
|
if (w == NULL)
|
|
goto error;
|
|
if (self->readable)
|
|
_bufferedreader_reset_buf(self);
|
|
/* Make some place by shifting the buffer. */
|
|
assert(VALID_WRITE_BUFFER(self));
|
|
memmove(self->buffer, self->buffer + self->write_pos,
|
|
Py_SAFE_DOWNCAST(self->write_end - self->write_pos,
|
|
Py_off_t, Py_ssize_t));
|
|
self->write_end -= self->write_pos;
|
|
self->raw_pos -= self->write_pos;
|
|
self->pos -= self->write_pos;
|
|
self->write_pos = 0;
|
|
avail = Py_SAFE_DOWNCAST(self->buffer_size - self->write_end,
|
|
Py_off_t, Py_ssize_t);
|
|
if (buffer->len <= avail) {
|
|
/* Everything can be buffered */
|
|
PyErr_Clear();
|
|
memcpy(self->buffer + self->write_end, buffer->buf, buffer->len);
|
|
self->write_end += buffer->len;
|
|
self->pos += buffer->len;
|
|
written = buffer->len;
|
|
goto end;
|
|
}
|
|
/* Buffer as much as possible. */
|
|
memcpy(self->buffer + self->write_end, buffer->buf, avail);
|
|
self->write_end += avail;
|
|
self->pos += avail;
|
|
/* XXX Modifying the existing exception e using the pointer w
|
|
will change e.characters_written but not e.args[2].
|
|
Therefore we just replace with a new error. */
|
|
_set_BlockingIOError("write could not complete without blocking",
|
|
avail);
|
|
goto error;
|
|
}
|
|
Py_CLEAR(res);
|
|
|
|
/* Adjust the raw stream position if it is away from the logical stream
|
|
position. This happens if the read buffer has been filled but not
|
|
modified (and therefore _bufferedwriter_flush_unlocked() didn't rewind
|
|
the raw stream by itself).
|
|
Fixes issue #6629.
|
|
*/
|
|
offset = RAW_OFFSET(self);
|
|
if (offset != 0) {
|
|
if (_buffered_raw_seek(self, -offset, 1) < 0)
|
|
goto error;
|
|
self->raw_pos -= offset;
|
|
}
|
|
|
|
/* Then write buf itself. At this point the buffer has been emptied. */
|
|
remaining = buffer->len;
|
|
written = 0;
|
|
while (remaining >= self->buffer_size) {
|
|
Py_ssize_t n = _bufferedwriter_raw_write(
|
|
self, (char *) buffer->buf + written, buffer->len - written);
|
|
if (n == -1) {
|
|
goto error;
|
|
} else if (n == -2) {
|
|
/* Write failed because raw file is non-blocking */
|
|
if (remaining > self->buffer_size) {
|
|
/* Can't buffer everything, still buffer as much as possible */
|
|
memcpy(self->buffer,
|
|
(char *) buffer->buf + written, self->buffer_size);
|
|
self->raw_pos = 0;
|
|
ADJUST_POSITION(self, self->buffer_size);
|
|
self->write_end = self->buffer_size;
|
|
written += self->buffer_size;
|
|
_set_BlockingIOError("write could not complete without "
|
|
"blocking", written);
|
|
goto error;
|
|
}
|
|
PyErr_Clear();
|
|
break;
|
|
}
|
|
written += n;
|
|
remaining -= n;
|
|
/* Partial writes can return successfully when interrupted by a
|
|
signal (see write(2)). We must run signal handlers before
|
|
blocking another time, possibly indefinitely. */
|
|
if (PyErr_CheckSignals() < 0)
|
|
goto error;
|
|
}
|
|
if (self->readable)
|
|
_bufferedreader_reset_buf(self);
|
|
if (remaining > 0) {
|
|
memcpy(self->buffer, (char *) buffer->buf + written, remaining);
|
|
written += remaining;
|
|
}
|
|
self->write_pos = 0;
|
|
/* TODO: sanity check (remaining >= 0) */
|
|
self->write_end = remaining;
|
|
ADJUST_POSITION(self, remaining);
|
|
self->raw_pos = 0;
|
|
|
|
end:
|
|
res = PyLong_FromSsize_t(written);
|
|
|
|
error:
|
|
LEAVE_BUFFERED(self)
|
|
return res;
|
|
}
|
|
|
|
|
|
/*
|
|
* BufferedRWPair
|
|
*/
|
|
|
|
/* XXX The usefulness of this (compared to having two separate IO objects) is
|
|
* questionable.
|
|
*/
|
|
|
|
typedef struct {
|
|
PyObject_HEAD
|
|
buffered *reader;
|
|
buffered *writer;
|
|
PyObject *dict;
|
|
PyObject *weakreflist;
|
|
} rwpair;
|
|
|
|
#define rwpair_CAST(op) ((rwpair *)(op))
|
|
|
|
/*[clinic input]
|
|
_io.BufferedRWPair.__init__
|
|
reader: object
|
|
writer: object
|
|
buffer_size: Py_ssize_t(c_default="DEFAULT_BUFFER_SIZE") = DEFAULT_BUFFER_SIZE
|
|
/
|
|
|
|
A buffered reader and writer object together.
|
|
|
|
A buffered reader object and buffered writer object put together to
|
|
form a sequential IO object that can read and write. This is typically
|
|
used with a socket or two-way pipe.
|
|
|
|
reader and writer are RawIOBase objects that are readable and
|
|
writeable respectively. If the buffer_size is omitted it defaults to
|
|
DEFAULT_BUFFER_SIZE.
|
|
[clinic start generated code]*/
|
|
|
|
static int
|
|
_io_BufferedRWPair___init___impl(rwpair *self, PyObject *reader,
|
|
PyObject *writer, Py_ssize_t buffer_size)
|
|
/*[clinic end generated code: output=327e73d1aee8f984 input=620d42d71f33a031]*/
|
|
{
|
|
_PyIO_State *state = find_io_state_by_def(Py_TYPE(self));
|
|
if (_PyIOBase_check_readable(state, reader, Py_True) == NULL) {
|
|
return -1;
|
|
}
|
|
if (_PyIOBase_check_writable(state, writer, Py_True) == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
self->reader = (buffered *) PyObject_CallFunction(
|
|
(PyObject *)state->PyBufferedReader_Type,
|
|
"On", reader, buffer_size);
|
|
if (self->reader == NULL)
|
|
return -1;
|
|
|
|
self->writer = (buffered *) PyObject_CallFunction(
|
|
(PyObject *)state->PyBufferedWriter_Type,
|
|
"On", writer, buffer_size);
|
|
if (self->writer == NULL) {
|
|
Py_CLEAR(self->reader);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
bufferedrwpair_traverse(PyObject *op, visitproc visit, void *arg)
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
Py_VISIT(Py_TYPE(self));
|
|
Py_VISIT(self->dict);
|
|
Py_VISIT(self->reader);
|
|
Py_VISIT(self->writer);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
bufferedrwpair_clear(PyObject *op)
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
Py_CLEAR(self->reader);
|
|
Py_CLEAR(self->writer);
|
|
Py_CLEAR(self->dict);
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
bufferedrwpair_dealloc(PyObject *op)
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
PyTypeObject *tp = Py_TYPE(self);
|
|
_PyObject_GC_UNTRACK(self);
|
|
FT_CLEAR_WEAKREFS(op, self->weakreflist);
|
|
(void)bufferedrwpair_clear(op);
|
|
tp->tp_free(self);
|
|
Py_DECREF(tp);
|
|
}
|
|
|
|
static PyObject *
|
|
_forward_call(buffered *self, PyObject *name, PyObject *args)
|
|
{
|
|
PyObject *func, *ret;
|
|
if (self == NULL) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"I/O operation on uninitialized object");
|
|
return NULL;
|
|
}
|
|
|
|
func = PyObject_GetAttr((PyObject *)self, name);
|
|
if (func == NULL) {
|
|
PyErr_SetObject(PyExc_AttributeError, name);
|
|
return NULL;
|
|
}
|
|
|
|
ret = PyObject_CallObject(func, args);
|
|
Py_DECREF(func);
|
|
return ret;
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_read(PyObject *op, PyObject *args)
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
return _forward_call(self->reader, &_Py_ID(read), args);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_peek(PyObject *op, PyObject *args)
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
return _forward_call(self->reader, &_Py_ID(peek), args);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_read1(PyObject *op, PyObject *args)
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
return _forward_call(self->reader, &_Py_ID(read1), args);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_readinto(PyObject *op, PyObject *args)
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
return _forward_call(self->reader, &_Py_ID(readinto), args);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_readinto1(PyObject *op, PyObject *args)
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
return _forward_call(self->reader, &_Py_ID(readinto1), args);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_write(PyObject *op, PyObject *args)
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
return _forward_call(self->writer, &_Py_ID(write), args);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_flush(PyObject *op, PyObject *Py_UNUSED(dummy))
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
return _forward_call(self->writer, &_Py_ID(flush), NULL);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_readable(PyObject *op, PyObject *Py_UNUSED(dummy))
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
return _forward_call(self->reader, &_Py_ID(readable), NULL);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_writable(PyObject *op, PyObject *Py_UNUSED(dummy))
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
return _forward_call(self->writer, &_Py_ID(writable), NULL);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_close(PyObject *op, PyObject *Py_UNUSED(dummy))
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
PyObject *exc = NULL;
|
|
PyObject *ret = _forward_call(self->writer, &_Py_ID(close), NULL);
|
|
if (ret == NULL) {
|
|
exc = PyErr_GetRaisedException();
|
|
}
|
|
else {
|
|
Py_DECREF(ret);
|
|
}
|
|
ret = _forward_call(self->reader, &_Py_ID(close), NULL);
|
|
if (exc != NULL) {
|
|
_PyErr_ChainExceptions1(exc);
|
|
Py_CLEAR(ret);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_isatty(PyObject *op, PyObject *Py_UNUSED(dummy))
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
PyObject *ret = _forward_call(self->writer, &_Py_ID(isatty), NULL);
|
|
|
|
if (ret != Py_False) {
|
|
/* either True or exception */
|
|
return ret;
|
|
}
|
|
Py_DECREF(ret);
|
|
|
|
return _forward_call(self->reader, &_Py_ID(isatty), NULL);
|
|
}
|
|
|
|
static PyObject *
|
|
bufferedrwpair_closed_get(PyObject *op, void *Py_UNUSED(dummy))
|
|
{
|
|
rwpair *self = rwpair_CAST(op);
|
|
if (self->writer == NULL) {
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"the BufferedRWPair object is being garbage-collected");
|
|
return NULL;
|
|
}
|
|
return PyObject_GetAttr((PyObject *) self->writer, &_Py_ID(closed));
|
|
}
|
|
|
|
|
|
/*
|
|
* BufferedRandom
|
|
*/
|
|
|
|
/*[clinic input]
|
|
_io.BufferedRandom.__init__
|
|
raw: object
|
|
buffer_size: Py_ssize_t(c_default="DEFAULT_BUFFER_SIZE") = DEFAULT_BUFFER_SIZE
|
|
|
|
A buffered interface to random access streams.
|
|
|
|
The constructor creates a reader and writer for a seekable stream,
|
|
raw, given in the first argument. If the buffer_size is omitted it
|
|
defaults to DEFAULT_BUFFER_SIZE.
|
|
[clinic start generated code]*/
|
|
|
|
static int
|
|
_io_BufferedRandom___init___impl(buffered *self, PyObject *raw,
|
|
Py_ssize_t buffer_size)
|
|
/*[clinic end generated code: output=d3d64eb0f64e64a3 input=a4e818fb86d0e50c]*/
|
|
{
|
|
self->ok = 0;
|
|
self->detached = 0;
|
|
|
|
_PyIO_State *state = find_io_state_by_def(Py_TYPE(self));
|
|
if (_PyIOBase_check_seekable(state, raw, Py_True) == NULL) {
|
|
return -1;
|
|
}
|
|
if (_PyIOBase_check_readable(state, raw, Py_True) == NULL) {
|
|
return -1;
|
|
}
|
|
if (_PyIOBase_check_writable(state, raw, Py_True) == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
Py_INCREF(raw);
|
|
Py_XSETREF(self->raw, raw);
|
|
self->buffer_size = buffer_size;
|
|
self->readable = 1;
|
|
self->writable = 1;
|
|
|
|
if (_buffered_init(self) < 0)
|
|
return -1;
|
|
_bufferedreader_reset_buf(self);
|
|
_bufferedwriter_reset_buf(self);
|
|
self->pos = 0;
|
|
|
|
self->fast_closed_checks = (Py_IS_TYPE(self, state->PyBufferedRandom_Type) &&
|
|
Py_IS_TYPE(raw, state->PyFileIO_Type));
|
|
|
|
self->ok = 1;
|
|
return 0;
|
|
}
|
|
|
|
#define clinic_state() (find_io_state_by_def(Py_TYPE(self)))
|
|
#include "clinic/bufferedio.c.h"
|
|
#undef clinic_state
|
|
|
|
static PyMethodDef bufferediobase_methods[] = {
|
|
_IO__BUFFEREDIOBASE_DETACH_METHODDEF
|
|
_IO__BUFFEREDIOBASE_READ_METHODDEF
|
|
_IO__BUFFEREDIOBASE_READ1_METHODDEF
|
|
_IO__BUFFEREDIOBASE_READINTO_METHODDEF
|
|
_IO__BUFFEREDIOBASE_READINTO1_METHODDEF
|
|
_IO__BUFFEREDIOBASE_WRITE_METHODDEF
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static PyType_Slot bufferediobase_slots[] = {
|
|
{Py_tp_doc, (void *)bufferediobase_doc},
|
|
{Py_tp_methods, bufferediobase_methods},
|
|
{0, NULL},
|
|
};
|
|
|
|
/* Do not set Py_TPFLAGS_HAVE_GC so that tp_traverse and tp_clear are inherited */
|
|
PyType_Spec bufferediobase_spec = {
|
|
.name = "_io._BufferedIOBase",
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
|
|
Py_TPFLAGS_IMMUTABLETYPE),
|
|
.slots = bufferediobase_slots,
|
|
};
|
|
|
|
static PyMethodDef bufferedreader_methods[] = {
|
|
/* BufferedIOMixin methods */
|
|
_IO__BUFFERED_DETACH_METHODDEF
|
|
_IO__BUFFERED_SIMPLE_FLUSH_METHODDEF
|
|
_IO__BUFFERED_CLOSE_METHODDEF
|
|
_IO__BUFFERED_SEEKABLE_METHODDEF
|
|
_IO__BUFFERED_READABLE_METHODDEF
|
|
_IO__BUFFERED_FILENO_METHODDEF
|
|
_IO__BUFFERED_ISATTY_METHODDEF
|
|
_IO__BUFFERED__DEALLOC_WARN_METHODDEF
|
|
|
|
_IO__BUFFERED_READ_METHODDEF
|
|
_IO__BUFFERED_PEEK_METHODDEF
|
|
_IO__BUFFERED_READ1_METHODDEF
|
|
_IO__BUFFERED_READINTO_METHODDEF
|
|
_IO__BUFFERED_READINTO1_METHODDEF
|
|
_IO__BUFFERED_READLINE_METHODDEF
|
|
_IO__BUFFERED_SEEK_METHODDEF
|
|
_IO__BUFFERED_TELL_METHODDEF
|
|
_IO__BUFFERED_TRUNCATE_METHODDEF
|
|
_IO__BUFFERED___SIZEOF___METHODDEF
|
|
|
|
{"__getstate__", _PyIOBase_cannot_pickle, METH_NOARGS},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static PyMemberDef bufferedreader_members[] = {
|
|
{"raw", _Py_T_OBJECT, offsetof(buffered, raw), Py_READONLY},
|
|
{"_finalizing", Py_T_BOOL, offsetof(buffered, finalizing), 0},
|
|
{"__weaklistoffset__", Py_T_PYSSIZET, offsetof(buffered, weakreflist), Py_READONLY},
|
|
{"__dictoffset__", Py_T_PYSSIZET, offsetof(buffered, dict), Py_READONLY},
|
|
{NULL}
|
|
};
|
|
|
|
static PyGetSetDef bufferedreader_getset[] = {
|
|
_IO__BUFFERED_CLOSED_GETSETDEF
|
|
_IO__BUFFERED_NAME_GETSETDEF
|
|
_IO__BUFFERED_MODE_GETSETDEF
|
|
{NULL}
|
|
};
|
|
|
|
|
|
static PyType_Slot bufferedreader_slots[] = {
|
|
{Py_tp_dealloc, buffered_dealloc},
|
|
{Py_tp_repr, buffered_repr},
|
|
{Py_tp_doc, (void *)_io_BufferedReader___init____doc__},
|
|
{Py_tp_traverse, buffered_traverse},
|
|
{Py_tp_clear, buffered_clear},
|
|
{Py_tp_iternext, buffered_iternext},
|
|
{Py_tp_methods, bufferedreader_methods},
|
|
{Py_tp_members, bufferedreader_members},
|
|
{Py_tp_getset, bufferedreader_getset},
|
|
{Py_tp_init, _io_BufferedReader___init__},
|
|
{0, NULL},
|
|
};
|
|
|
|
PyType_Spec bufferedreader_spec = {
|
|
.name = "_io.BufferedReader",
|
|
.basicsize = sizeof(buffered),
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC |
|
|
Py_TPFLAGS_IMMUTABLETYPE),
|
|
.slots = bufferedreader_slots,
|
|
};
|
|
|
|
static PyMethodDef bufferedwriter_methods[] = {
|
|
/* BufferedIOMixin methods */
|
|
_IO__BUFFERED_CLOSE_METHODDEF
|
|
_IO__BUFFERED_DETACH_METHODDEF
|
|
_IO__BUFFERED_SEEKABLE_METHODDEF
|
|
_IO__BUFFERED_WRITABLE_METHODDEF
|
|
_IO__BUFFERED_FILENO_METHODDEF
|
|
_IO__BUFFERED_ISATTY_METHODDEF
|
|
_IO__BUFFERED__DEALLOC_WARN_METHODDEF
|
|
|
|
_IO_BUFFEREDWRITER_WRITE_METHODDEF
|
|
_IO__BUFFERED_TRUNCATE_METHODDEF
|
|
_IO__BUFFERED_FLUSH_METHODDEF
|
|
_IO__BUFFERED_SEEK_METHODDEF
|
|
_IO__BUFFERED_TELL_METHODDEF
|
|
_IO__BUFFERED___SIZEOF___METHODDEF
|
|
|
|
{"__getstate__", _PyIOBase_cannot_pickle, METH_NOARGS},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static PyMemberDef bufferedwriter_members[] = {
|
|
{"raw", _Py_T_OBJECT, offsetof(buffered, raw), Py_READONLY},
|
|
{"_finalizing", Py_T_BOOL, offsetof(buffered, finalizing), 0},
|
|
{"__weaklistoffset__", Py_T_PYSSIZET, offsetof(buffered, weakreflist), Py_READONLY},
|
|
{"__dictoffset__", Py_T_PYSSIZET, offsetof(buffered, dict), Py_READONLY},
|
|
{NULL}
|
|
};
|
|
|
|
static PyGetSetDef bufferedwriter_getset[] = {
|
|
_IO__BUFFERED_CLOSED_GETSETDEF
|
|
_IO__BUFFERED_NAME_GETSETDEF
|
|
_IO__BUFFERED_MODE_GETSETDEF
|
|
{NULL}
|
|
};
|
|
|
|
|
|
static PyType_Slot bufferedwriter_slots[] = {
|
|
{Py_tp_dealloc, buffered_dealloc},
|
|
{Py_tp_repr, buffered_repr},
|
|
{Py_tp_doc, (void *)_io_BufferedWriter___init____doc__},
|
|
{Py_tp_traverse, buffered_traverse},
|
|
{Py_tp_clear, buffered_clear},
|
|
{Py_tp_methods, bufferedwriter_methods},
|
|
{Py_tp_members, bufferedwriter_members},
|
|
{Py_tp_getset, bufferedwriter_getset},
|
|
{Py_tp_init, _io_BufferedWriter___init__},
|
|
{0, NULL},
|
|
};
|
|
|
|
PyType_Spec bufferedwriter_spec = {
|
|
.name = "_io.BufferedWriter",
|
|
.basicsize = sizeof(buffered),
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC |
|
|
Py_TPFLAGS_IMMUTABLETYPE),
|
|
.slots = bufferedwriter_slots,
|
|
};
|
|
|
|
static PyMethodDef bufferedrwpair_methods[] = {
|
|
{"read", bufferedrwpair_read, METH_VARARGS},
|
|
{"peek", bufferedrwpair_peek, METH_VARARGS},
|
|
{"read1", bufferedrwpair_read1, METH_VARARGS},
|
|
{"readinto", bufferedrwpair_readinto, METH_VARARGS},
|
|
{"readinto1", bufferedrwpair_readinto1, METH_VARARGS},
|
|
|
|
{"write", bufferedrwpair_write, METH_VARARGS},
|
|
{"flush", bufferedrwpair_flush, METH_NOARGS},
|
|
|
|
{"readable", bufferedrwpair_readable, METH_NOARGS},
|
|
{"writable", bufferedrwpair_writable, METH_NOARGS},
|
|
|
|
{"close", bufferedrwpair_close, METH_NOARGS},
|
|
{"isatty", bufferedrwpair_isatty, METH_NOARGS},
|
|
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static PyMemberDef bufferedrwpair_members[] = {
|
|
{"__weaklistoffset__", Py_T_PYSSIZET, offsetof(rwpair, weakreflist), Py_READONLY},
|
|
{"__dictoffset__", Py_T_PYSSIZET, offsetof(rwpair, dict), Py_READONLY},
|
|
{NULL}
|
|
};
|
|
|
|
static PyGetSetDef bufferedrwpair_getset[] = {
|
|
{"closed", bufferedrwpair_closed_get, NULL, NULL},
|
|
{NULL}
|
|
};
|
|
|
|
static PyType_Slot bufferedrwpair_slots[] = {
|
|
{Py_tp_dealloc, bufferedrwpair_dealloc},
|
|
{Py_tp_doc, (void *)_io_BufferedRWPair___init____doc__},
|
|
{Py_tp_traverse, bufferedrwpair_traverse},
|
|
{Py_tp_clear, bufferedrwpair_clear},
|
|
{Py_tp_methods, bufferedrwpair_methods},
|
|
{Py_tp_members, bufferedrwpair_members},
|
|
{Py_tp_getset, bufferedrwpair_getset},
|
|
{Py_tp_init, _io_BufferedRWPair___init__},
|
|
{0, NULL},
|
|
};
|
|
|
|
PyType_Spec bufferedrwpair_spec = {
|
|
.name = "_io.BufferedRWPair",
|
|
.basicsize = sizeof(rwpair),
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC |
|
|
Py_TPFLAGS_IMMUTABLETYPE),
|
|
.slots = bufferedrwpair_slots,
|
|
};
|
|
|
|
|
|
static PyMethodDef bufferedrandom_methods[] = {
|
|
/* BufferedIOMixin methods */
|
|
_IO__BUFFERED_CLOSE_METHODDEF
|
|
_IO__BUFFERED_DETACH_METHODDEF
|
|
_IO__BUFFERED_SEEKABLE_METHODDEF
|
|
_IO__BUFFERED_READABLE_METHODDEF
|
|
_IO__BUFFERED_WRITABLE_METHODDEF
|
|
_IO__BUFFERED_FILENO_METHODDEF
|
|
_IO__BUFFERED_ISATTY_METHODDEF
|
|
_IO__BUFFERED__DEALLOC_WARN_METHODDEF
|
|
|
|
_IO__BUFFERED_FLUSH_METHODDEF
|
|
|
|
_IO__BUFFERED_SEEK_METHODDEF
|
|
_IO__BUFFERED_TELL_METHODDEF
|
|
_IO__BUFFERED_TRUNCATE_METHODDEF
|
|
_IO__BUFFERED_READ_METHODDEF
|
|
_IO__BUFFERED_READ1_METHODDEF
|
|
_IO__BUFFERED_READINTO_METHODDEF
|
|
_IO__BUFFERED_READINTO1_METHODDEF
|
|
_IO__BUFFERED_READLINE_METHODDEF
|
|
_IO__BUFFERED_PEEK_METHODDEF
|
|
_IO_BUFFEREDWRITER_WRITE_METHODDEF
|
|
_IO__BUFFERED___SIZEOF___METHODDEF
|
|
|
|
{"__getstate__", _PyIOBase_cannot_pickle, METH_NOARGS},
|
|
{NULL, NULL}
|
|
};
|
|
|
|
static PyMemberDef bufferedrandom_members[] = {
|
|
{"raw", _Py_T_OBJECT, offsetof(buffered, raw), Py_READONLY},
|
|
{"_finalizing", Py_T_BOOL, offsetof(buffered, finalizing), 0},
|
|
{"__weaklistoffset__", Py_T_PYSSIZET, offsetof(buffered, weakreflist), Py_READONLY},
|
|
{"__dictoffset__", Py_T_PYSSIZET, offsetof(buffered, dict), Py_READONLY},
|
|
{NULL}
|
|
};
|
|
|
|
static PyGetSetDef bufferedrandom_getset[] = {
|
|
_IO__BUFFERED_CLOSED_GETSETDEF
|
|
_IO__BUFFERED_NAME_GETSETDEF
|
|
_IO__BUFFERED_MODE_GETSETDEF
|
|
{NULL}
|
|
};
|
|
|
|
|
|
static PyType_Slot bufferedrandom_slots[] = {
|
|
{Py_tp_dealloc, buffered_dealloc},
|
|
{Py_tp_repr, buffered_repr},
|
|
{Py_tp_doc, (void *)_io_BufferedRandom___init____doc__},
|
|
{Py_tp_traverse, buffered_traverse},
|
|
{Py_tp_clear, buffered_clear},
|
|
{Py_tp_iternext, buffered_iternext},
|
|
{Py_tp_methods, bufferedrandom_methods},
|
|
{Py_tp_members, bufferedrandom_members},
|
|
{Py_tp_getset, bufferedrandom_getset},
|
|
{Py_tp_init, _io_BufferedRandom___init__},
|
|
{0, NULL},
|
|
};
|
|
|
|
PyType_Spec bufferedrandom_spec = {
|
|
.name = "_io.BufferedRandom",
|
|
.basicsize = sizeof(buffered),
|
|
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE | Py_TPFLAGS_HAVE_GC |
|
|
Py_TPFLAGS_IMMUTABLETYPE),
|
|
.slots = bufferedrandom_slots,
|
|
};
|